CN210356494U - Tail-end dust removal and whitening system for flue gas - Google Patents
Tail-end dust removal and whitening system for flue gas Download PDFInfo
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- CN210356494U CN210356494U CN201920683099.8U CN201920683099U CN210356494U CN 210356494 U CN210356494 U CN 210356494U CN 201920683099 U CN201920683099 U CN 201920683099U CN 210356494 U CN210356494 U CN 210356494U
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Abstract
The utility model discloses a terminal dust removal of flue gas takes off white system relates to atmosphere pollution control field. The utility model discloses a: the bottom of the interior of the dust removal box body is provided with a sedimentation tank with an upward opening; the flue gas inlet flue is introduced into the dedusting box body from the outside of the dedusting box body and penetrates through the sedimentation tank to reach the upper part of the sedimentation tank; the first-stage dust removal dehydration area and the second-stage dust removal dehydration area are positioned in the dust removal box body, the second-stage dust removal dehydration area is positioned above the first-stage dust removal dehydration area, and the first-stage dust removal dehydration area is positioned above the sedimentation tank; the first-stage dust removal dehydration zone and the second-stage dust removal dehydration zone respectively comprise a plurality of layers of heat pipe heat exchange layers and filter screen dust removal layers which are distributed at intervals; and the flue gas outlet flue is communicated with the top end of the dust removal box body. The utility model aims to further remove dust to industrial flue gas under the conditions of low cost and low energy consumption to reach near zero emission and eliminate white smoke.
Description
Technical Field
The utility model relates to an atmosphere pollution control field, more specifically say, relate to a terminal dust removal of flue gas takes off white system, is 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 electrons and the charged particles are subjected to combined action of electric field force, water mist collision and adsorption coagulationThe particles are collected on the dust collecting plate to achieve the purpose of removing dust. 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; the LT method can remove 99% of smoke dust, and reduce the smoke dust to 10mg/m3And a large amount of water resources are saved. But the most widely used is OG method dust pelletizing system at present, and this application 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 increased water saturation by sprayingThe dust removal device has the advantages of large water consumption, continuous supplement of clean water, consumption of a large amount of electric energy, rough dust removal mode, difficulty in fine dust removal, suitability for front-section dust removal and inapplicability to tail-end dust removal.
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 dust removal of flue gas takes off white system, 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 dust removal of flue gas takes off white system, include:
the bottom of the interior of the dust removal box body is provided with a sedimentation tank with an upward opening;
the flue gas inlet flue is introduced into the dedusting box body from the outside of the dedusting box body and penetrates through the sedimentation tank to reach the upper part of the sedimentation tank;
the device comprises a first-stage dust removal dehydration area and a second-stage dust removal dehydration area which are positioned in a dust removal box body, wherein the second-stage dust removal dehydration area is positioned above the first-stage dust removal dehydration area, and the first-stage dust removal dehydration area is positioned above a sedimentation tank; the first-stage dust removal dehydration zone and the second-stage dust removal dehydration zone respectively comprise a plurality of layers of heat pipe heat exchange layers and filter screen dust removal layers which are distributed at intervals;
and the flue gas outlet flue is communicated with the top end of the dust removal box body.
As a further improvement, the one-level dust removal dehydration zone top with the second grade dust removal dehydration zone top corresponds respectively and installs the unit that sprays.
As a further improvement, the opening part on the top end of the sedimentation tank is covered with a pore plate, and a plurality of limber holes are arranged on the pore plate.
As a further improvement, the heat exchange layer of the heat pipe comprises a plurality of heat pipes arranged in parallel, the evaporation section of each heat pipe is positioned inside the dust removal box, and the condensation section of each heat pipe is positioned outside the dust removal box.
As a further improvement, the filter screen dust removal layer comprises a support frame, and a filter screen is paved on the support frame.
As a further improvement, a plurality of object placing plates are fixed on the inner side wall of the dust removing box body, and the supporting frame is supported on the object placing plates.
As a further improvement, the flue gas inlet flue is located the vertical upwards setting of open end of sedimentation tank top, the top of open end is provided with the hood, and the top surface of this hood is the bellied arc surface that makes progress, and the vertical decurrent projection of this hood top surface covers the open end.
As a further improvement of the present invention, the portion below the top surface of the hood is a cone with its vertex downward, and a plurality of ventilation grooves are arranged on the outer surface of the cone at intervals, and the ventilation grooves are located on the generatrix of the cone.
As a further improvement of the utility model, the bottom of the sedimentation tank is provided with an opening, and a sealing plug is arranged on the opening.
As a further improvement, the dust removal box is equipped with the flue gas entry on being close to the lateral wall of sedimentation tank top and observes the hole, the dust removal box is equipped with the exhanst gas outlet on being close to the lateral wall of exhanst gas outlet flue and observes the hole.
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, a multi-stage dust removal dehydration area is arranged to cool the flue gas in stages to achieve the purposes of dust removal and dehydration, and the temperature of the discharged flue gas can be controlled; the heat exchange layers of the heat pipes and the dust removal layers of the filter screens are arranged at intervals, so that the temperature in the dust removal box body can be adjusted, water vapor in the flue gas is condensed by taking micro dust as a condensation core and is collided to grow, and the dust removal and dehydration efficiency is high.
(2) The utility model discloses a white system is taken off in dust removal can one-time investment, realizes the flue gas cooling through natural forced air cooling in the operation process, does not consume other power, hardly consumes the cooling water.
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 dust removal and whitening system at the tail end of flue gas in the embodiment;
FIG. 2 is a schematic sectional view taken along A-A in FIG. 1;
FIG. 3 is a schematic structural diagram of a screen dust removal unit in the embodiment;
FIG. 4 is a flow chart of a method for removing dust and whitening at the end of flue gas in the embodiment.
The reference numerals in the schematic drawings illustrate: 1. a flue gas inlet flue; 2. a first-stage dust removal dehydration zone; 3. a secondary dust removal dehydration zone; 4. a flue gas outlet flue; 5. a spraying unit; 6. a sedimentation tank; 7. a sealing plug; 8. an orifice plate; 9. a flue gas inlet observation hole; 10. a flue gas outlet observation hole; 11. a heat pipe; 12. a filter screen dedusting layer; 1201. a support frame; 1202. filtering with a screen; 13. a dust removal box body; 1301. a storage plate; 14. a blast cap.
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. 1-3, the system for removing dust and white at the end of flue gas of the present embodiment includes:
the bottom of the interior of the dust removal box body 13 is provided with a sedimentation tank 6 with an upward opening;
the flue gas inlet flue 1 is introduced into the dedusting box body 13 from the outside of the dedusting box body 13, and penetrates through the sedimentation tank 6 to reach the upper part of the sedimentation tank 6;
the primary dedusting and dewatering area 2 and the secondary dedusting and dewatering area 3 are positioned in the dedusting box body 13, the secondary dedusting and dewatering area 3 is positioned above the primary dedusting and dewatering area 2, and the primary dedusting and dewatering area 2 is positioned above the sedimentation tank 6; the first-stage dust removal dehydration zone 2 and the second-stage dust removal dehydration zone 3 both comprise a plurality of layers of heat pipe heat exchange layers and filter screen dust removal layers 12 which are distributed at intervals; (i.e. one heat pipe heat exchange layer, one filter screen dedusting layer 12 and one heat pipe heat exchange layer …. the first-stage dedusting and dewatering area 2 or the second-stage dedusting and dewatering area 3 are formed by the interval distribution)
And the flue gas outlet flue 4 is communicated with the top end of the dedusting box body 13.
In the embodiment, the flue gas after wet dedusting enters the dedusting box body 13 through the flue gas inlet flue 1, because the flue gas inlet flue 1 is introduced into the dedusting box body 13 from the outside of the dedusting box body 13 and passes through the sedimentation tank 6 to reach the upper part of the sedimentation tank 6, when the flue gas circulates in the flue gas inlet flue 1 in the sedimentation tank 6, the water stored in the sedimentation tank 6 exchanges heat with the flue gas, so that the flue gas flowing out from the flue gas inlet flue 1 is pre-cooled to a certain degree, then the flue gas is processed by the primary dedusting and dehydrating zone 2 and the secondary dedusting and dehydrating zone 3 in sequence, wherein the flue gas condenses small droplets near each layer of heat exchange layer by taking smoke dust as a condensation core, part of water vapor condenses and grows on the surfaces of the heat pipes, falls into the lower filter screen dedusting layer 12 under the action of gravity, collides, grows and finally falls into the sedimentation tank 6, and part of the small droplets are carried by the, and the smoke gradually collides and grows up, finally falls into a sedimentation tank 6 below, is subjected to fine dust removal and dehydration in a primary dust removal dehydration zone 2 and a secondary dust removal dehydration zone 3, and is discharged into the atmosphere from a smoke outlet flue 4, wherein the temperature of the discharged smoke is about 50 ℃, the dust content and the water content are remarkably reduced, and white smoke is eliminated. It should be noted that, the interior of the dust removing box 13 in this embodiment is not limited to the first-stage dust removing and dewatering zone 2 and the second-stage dust removing and dewatering zone 3, and it is also possible to set a third-stage dust removing and dewatering zone and a fourth-stage dust removing and dewatering zone above the second-stage dust removing and dewatering zone 3 in sequence.
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 lies in achieving near zero emission and eliminating white smoke by further dedusting the industrial flue gas under the conditions of low cost and low energy consumption, in this embodiment, a multi-stage dedusting and dehydrating area is arranged, the flue gas is cooled in stages to achieve the purposes of dedusting and dehydrating, and the temperature of the discharged flue gas can be controlled; the heat pipe heat exchange layers and the filter screen dust removal layer 12 are arranged at intervals, so that the temperature in the dust removal box body 13 can be adjusted, water vapor in the flue gas is condensed by taking tiny dust as a condensation core continuously and is collided to grow, and the dust removal and dehydration efficiency is high; the dedusting and whitening system of the embodiment can realize flue gas cooling through natural air cooling in the operation process by one-time investment, does not consume other power, and hardly consumes cooling water.
Example 2
The structure of the system for removing dust and white at the tail end of the flue gas is basically the same as that of the system in the embodiment 1, and further: spraying units 5 are respectively and correspondingly arranged above the primary dust-removing and dewatering area 2 and the secondary dust-removing and dewatering area 3 (in the embodiment, the spraying units 5 comprise a horizontal water pipe, and a plurality of nozzles are arranged on the water pipe).
In this embodiment, the unit 5 that sprays is installed to one-level dust removal dehydration district 2 top and second grade dust removal dehydration district 3 top correspondence respectively, after the system operation of removing dust and whitening for a period, there is a small amount of bonding thing in every layer of heat pipe heat transfer layer surface and every layer of filter screen dust removal layer 12 surface, can open the unit 5 that sprays above one-level dust removal dehydration district 2 and the unit 5 that sprays above second grade dust removal dehydration district 3 and wash, ensures the reliability of system operation.
Example 3
The structure of the flue gas terminal dust removal and whitening system of the embodiment is basically the same as that of the embodiment 2, and further: the opening part at the top end of the sedimentation tank 6 is covered with a pore plate 8, and a plurality of water through holes are formed in the pore plate 8.
In this embodiment, the opening at the top end of the sedimentation tank 6 is covered with a pore plate 8, the pore plate 8 is provided with a plurality of water through holes, moisture falling from the upper side of the sedimentation tank 6 can enter the sedimentation tank 6 along the water through holes to be stored, and other bonded dust and particles are blocked on the pore plate 8 and can be cleaned regularly.
Example 4
The structure of the system for removing dust and white at the tail end of the flue gas is basically the same as that of the system in the embodiment 3, and further: each layer of heat exchange layer of heat pipes comprises a plurality of heat pipes 11 which are arranged in parallel, the evaporation sections of the heat pipes 11 are positioned inside the dust removal box body 13, and the condensation sections of the heat pipes 11 are positioned outside the dust removal box body 13.
In this embodiment, each layer of heat exchange layer of heat pipes includes a plurality of heat pipes 11 arranged in parallel, the evaporation sections of the heat pipes 11 are located inside the dust removing box 13, the condensation sections of the heat pipes 11 are located outside the dust removing box 13, when flue gas passes through the evaporation sections of the heat pipes 11 inside the dust removing box 13, heat is absorbed quickly, and then the absorbed heat of the flue gas is dissipated to the outside of the dust removing box 13 in time through working media in the heat pipes 11.
Example 5
The structure of the flue gas terminal dust removal and whitening system of the embodiment is basically the same as that of the embodiment 4, and further: the filter screen dust-removing layer 12 comprises a supporting frame 1201, a filter screen 1202 is laid on the supporting frame 1201 (in the embodiment, the supporting frame 1201 is a rectangular frame fixed on the inner side wall of the dust-removing box 13, the filter screen 1202 is laid on the supporting frame 1201, and the edge of the filter screen 1202 is fixed on the edge of the supporting frame 1201 through screws.)
In this embodiment, the filter screen dust removal layer 12 includes the support frame 1201, and this support frame 1201 is spread with the filter screen 1202 on, blocks, adsorbs moisture, dust in the flue gas through the filter screen 1202, can effectually realize that the flue gas removes dust and takes off white.
Example 6
The structure of the system for removing dust and white at the tail end of the flue gas is basically the same as that of the system in the embodiment 5, and further: a plurality of object placing plates 1301 are fixed on the inner side wall of the dust removing box body 13, and the supporting frame 1201 is supported on the object placing plates 1301 (in this embodiment, one object placing plate 1301 is respectively arranged on four surfaces of the inner side wall of the dust removing box body 13 at the same horizontal height, and one supporting frame 1201 is arranged above the four object placing plates 1301).
In this embodiment, a plurality of object placing plates 1301 are fixed on the inner side wall of the dust removing box body 13, and the supporting frame 1201 is supported on the object placing plates 1301, so that the supporting frame 1201 is greatly convenient to mount and dismount.
Example 7
The structure of the system for removing dust and white at the tail end of the flue gas is basically the same as that of the system in the embodiment 6, and further comprises the following steps: the open end that flue gas inlet flue 1 is located sedimentation tank 6 top sets up vertically upwards, and the top of open end is provided with hood 14, and the top surface of this hood 14 is the bellied arc surface that makes progress, and the vertical decurrent projection of this hood 14 top surface covers the open end (in this embodiment of the concrete, refer to fig. 1, the border part of hood 14 passes through the connecting rod to be connected on the open end).
In this embodiment, flue gas inlet flue 1 is located the vertical upwards setting of open end above sedimentation tank 6, the top of open end is provided with hood 14, the top surface of this hood 14 is the bellied arc surface that makes progress, and the vertical decurrent projection of this hood 14 top surface covers the open end, there are moisture and dust when sedimentation tank 6 top falls, the granule is when falling, it can be at first on the top surface of hood 14, then along with 14 top surfaces landing of hood to orifice plate 8, moisture and dust have effectively been avoided, the granule falls to in the flue gas inlet flue 1.
Example 8
The structure of the system for removing dust and white at the tail end of the flue gas is basically the same as that of the system in the embodiment 7, and further comprises the following steps: the part below the top surface of the blast cap 14 is a cone with a downward vertex, a plurality of ventilation grooves are arranged on the outer surface of the cone at intervals, and the ventilation grooves are positioned on the generatrix of the cone.
In this embodiment, the part below the top surface of the hood 14 is a cone with a downward vertex, a plurality of ventilation grooves are arranged on the outer surface of the cone at intervals, the ventilation grooves are located on a bus of the cone, and the flue gas discharged from the opening end of the flue gas inlet flue 1 located above the sedimentation tank 6 is guided and dispersed around the ventilation grooves on the hood 14, so that the flue gas can be fully diffused in the primary dust removal dehydration zone 2 and the secondary dust removal dehydration zone 3, and the dust removal and whitening effects of the flue gas are remarkably improved.
Example 9
The structure of the system for removing dust and white at the tail end of the flue gas is basically the same as that of the system in the embodiment 8, and further: the bottom of the sedimentation tank 6 is provided with an opening, and a sealing plug 7 (in the embodiment, the sealing plug 7 is a pressing handle type rubber plug) is arranged on the opening.
In this embodiment, the bottom of sedimentation tank 6 is equipped with the opening, installs sealing plug 7 on this opening, and when the water in sedimentation tank 6 accumulated to a certain extent, sealing plug 7 that can open sedimentation tank 6 bottom discharged unnecessary ponding.
Example 10
The structure of the system for removing dust and white at the tail end of the flue gas is basically the same as that of the system in the embodiment 9, and further: a flue gas inlet observation hole 9 is arranged on the side wall of the dedusting box body 13 above the sedimentation tank 6, and a flue gas outlet observation hole 10 is arranged on the side wall of the dedusting box body 13 above the flue gas outlet flue 4.
In this embodiment, the side wall of the dust removal box body 13, which is close to the upper side of the sedimentation tank 6, is provided with the flue gas inlet observation hole 9, the side wall of the dust removal box body 13, which is close to the flue gas outlet flue 4, is provided with the flue gas outlet observation hole 10, and the flue gas inlet observation hole 9 and the flue gas outlet observation hole 10 can be used for comparing and observing the dust removal and whitening effects of flue gas in the dust removal box body 13 and regularly inspecting and maintaining the dust removal box body 13.
Example 11
The structure of the system for removing dust and white at the tail end of the flue gas is basically the same as that of the system in the embodiment 10, and further: the evaporation section of the heat pipe 11 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 11 is a finned pipe, which strengthens the heat exchange with the external environment; the lowest layer of the primary dedusting and dehydrating zone 2 is a heat pipe heat exchange layer, and the flue gas is firstly cooled, so that the subsequent dedusting effect is improved; the part of the flue gas inlet flue 1 positioned in the sedimentation tank 6 comprises a coil pipe section (namely a spiral pipeline system), and the heat in the flue gas can be efficiently transferred to the stored water in the sedimentation tank 6 through the coil pipe section, so that the subsequent dedusting and whitening effects of the flue gas are improved; the surface of the evaporation section of the heat pipe 11 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 11 to be beaded and rapidly fall under the action of gravity, so that the formation of film-shaped condensation deterioration heat transfer is avoided, and scale deposit or adhesive is not formed on the surface of the heat pipe 11; in the first-stage dust removal dehydration zone 2 and the second-stage dust removal dehydration zone 3, the heat pipes 11 on the heat pipe heat exchange layers of the two adjacent layers are mutually vertical, and the orthogonal arrangement of the heat pipes 11 improves the heat exchange uniformity and efficiency of the whole first-stage dust removal dehydration zone 2 and the second-stage dust removal dehydration zone 3, thereby improving the dust removal and whitening effect.
Example 12
The structure of the system for removing dust and white at the tail end of the flue gas is basically the same as that of the system in the embodiment 11, and further: in this embodiment, the heat pipe 11 is a negative pressure heat pipe, the working medium in the heat pipe 11 can be water, acetic acid, methanol, acetone, etc., and the phase transition temperature (i.e., boiling point) of the working medium in the heat pipe 11 is controlled to be 45-70 ℃, and the mesh number of the filter screen 1202 is controlled to be 30-60 meshes; wherein: the phase change temperature of the working medium in the heat pipe 11 in the primary dedusting and dehydrating area 2 is higher than that of the working medium in the heat pipe 11 in the secondary dedusting and dehydrating area 3; the aperture of the filter screen 1202 in the first-stage dust-removing dehydration zone 2 is larger than that of the filter screen 1202 in the second-stage dust-removing dehydration zone 3; in the embodiment, the working medium in the heat pipe 11 in the primary dedusting and dehydrating zone 2 is methanol, the phase change temperature is controlled to be 60 ℃, the working medium in the heat pipe 11 in the secondary dedusting and dehydrating zone 3 is acetone, and the phase change temperature is controlled to be 45 ℃; the mesh number of the filter screen 1202 in the first-stage dust-removing and dewatering area 2 is 35 meshes, and the mesh number of the filter screen 1202 in the second-stage dust-removing and dewatering area 3 is 50 meshes.
In this embodiment, the apertures of the filter screens 1202 in the first-stage dust-removing and dewatering zone 2 and the second-stage dust-removing and dewatering zone 3 and the phase-change temperature of the working medium in the heat pipes 11 are designed to be different, specifically, the number of the filter screens 1202 in the second-stage dust-removing and dewatering zone 3 is greater than that of the filter screens 1202 in the first-stage dust-removing and dewatering zone 2, the phase-change temperature of the working medium in the heat pipes 11 in the first-stage dust-removing and dewatering zone 2 is greater than that of the working medium in the heat pipes 11 in the second-stage dust-removing and dewatering zone 3, so as to increase the temperature difference between the working medium in the heat pipes 11 in the same-stage dust-removing and dewatering zone and the flue gas, increase the heat exchange capacity, lower the flue gas temperature, and further lower the flue gas water content and dust content, and simultaneously, by matching with the different apertures of the filter screens 1202 in, finally, the dust removal and whitening effect is improved.
Example 13
Referring to fig. 4, the flue gas terminal dust-removing and whitening method based on the flue gas terminal dust-removing and whitening system of the embodiment 12 of the present embodiment includes the following steps:
step A: preparing a flue gas tail end dust removal and whitening system, setting a working medium in a heat pipe 11 in a primary dust removal and dehydration area 2 as methanol, and controlling the phase change temperature to be 60 ℃; setting the working medium in the heat pipe 11 in the secondary dedusting and dehydrating area 3 as acetone, and controlling the phase change temperature to be 45 ℃; the mesh number of the filter screen 1202 in the first-stage dust removal dehydration zone 2 is set to be 35 meshes, and the mesh number of the filter screen 1202 in the second-stage dust removal dehydration zone 3 is set to be 50 meshes;
and B: introducing flue gas into the flue gas inlet flue 1, and cooling the flue gas due to heat exchange between the flue gas and water stored in the sedimentation tank 6 when the flue gas circulates in the flue gas inlet flue 1 positioned in the sedimentation tank 6;
and C: the flue gas is discharged from the opening end of the flue gas inlet flue 1 above the sedimentation tank 6, and the discharged flue gas is guided and dispersed to the periphery along a plurality of ventilation grooves on the blast cap 14;
step D: the flue gas passes through the primary dedusting and dehydrating area 2 and the secondary dedusting and dehydrating area 3 for dedusting and dehydrating treatment in sequence, and is discharged from the flue gas outlet flue 4.
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 (10)
1. The utility model provides a tail-end dust removal of flue gas takes off white system which characterized in that includes:
the bottom of the interior of the dust removal box body (13) is provided with a sedimentation tank (6) with an upward opening;
the flue gas inlet flue (1), the flue gas inlet flue (1) is introduced into the dedusting box body (13) from the outside of the dedusting box body (13) and passes through the sedimentation tank (6) to reach the upper part of the sedimentation tank (6);
the device comprises a primary dedusting and dewatering area (2) and a secondary dedusting and dewatering area (3) which are positioned in a dedusting box body (13), wherein the secondary dedusting and dewatering area (3) is positioned above the primary dedusting and dewatering area (2), and the primary dedusting and dewatering area (2) is positioned above a sedimentation tank (6); the first-stage dust removal dehydration zone (2) and the second-stage dust removal dehydration zone (3) both comprise a plurality of layers of heat pipe heat exchange layers and filter screen dust removal layers (12) which are distributed at intervals;
and the flue gas outlet flue (4), the flue gas outlet flue (4) is communicated with the top end of the dedusting box body (13).
2. The flue gas end dust removal and whitening system of claim 1, characterized in that: and a spraying unit (5) is correspondingly arranged above the first-stage dust removal dehydration zone (2) and above the second-stage dust removal dehydration zone (3) respectively.
3. The flue gas end dust removal and whitening system of claim 1, characterized in that: the opening part at the top end of the sedimentation tank (6) is covered with a pore plate (8), and the pore plate (8) is provided with a plurality of limber holes.
4. The flue gas end dust removal and whitening system of claim 1, characterized in that: each layer of heat exchange layer of the heat pipes comprises a plurality of heat pipes (11) which are arranged in parallel, evaporation sections of the heat pipes (11) are positioned inside the dust removal box body (13), and condensation sections of the heat pipes (11) are positioned outside the dust removal box body (13).
5. The flue gas end dust removal and whitening system of claim 4, characterized in that: the filter screen dust removal layer (12) comprises a support frame (1201), and a filter screen (1202) is paved on the support frame (1201).
6. The flue gas end dust removal and whitening system of claim 5, characterized in that: a plurality of object placing plates (1301) are fixed on the inner side wall of the dust removing box body (13), and the supporting frame (1201) is supported on the object placing plates (1301).
7. The flue gas end dust removal and whitening system of claim 1, characterized in that: the flue gas inlet flue (1) is located the vertical upwards setting of open end above sedimentation tank (6), the top of open end is provided with hood (14), and the top surface of this hood (14) is the bellied arc surface that makes progress, and the vertical decurrent projection of this hood (14) top surface covers the open end.
8. The flue gas end dust removal and whitening system of claim 7, characterized in that: the part below the top surface of the blast cap (14) is a cone with a downward vertex, a plurality of ventilation grooves are arranged on the outer surface of the cone at intervals, and the ventilation grooves are positioned on a generatrix of the cone.
9. The flue gas end dust removal and whitening system of claim 1, characterized in that: an opening is formed in the bottom of the sedimentation tank (6), and a sealing plug (7) is mounted on the opening.
10. The system for dedusting and whitening the tail end of the flue gas according to any one of claims 1 to 9, characterized in that: the side wall of the dust removal box body (13) close to the upper part of the sedimentation tank (6) is provided with a flue gas inlet observation hole (9), and the side wall of the dust removal box body (13) close to the flue gas outlet flue (4) is provided with a flue gas outlet observation hole (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920683099.8U CN210356494U (en) | 2019-05-13 | 2019-05-13 | Tail-end dust removal and whitening system for flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920683099.8U CN210356494U (en) | 2019-05-13 | 2019-05-13 | Tail-end dust removal and whitening system for flue gas |
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| CN210356494U true CN210356494U (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110090521A (en) * | 2019-05-13 | 2019-08-06 | 安徽工业大学 | A kind of dedusting of flue gas end takes off white system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110090521A (en) * | 2019-05-13 | 2019-08-06 | 安徽工业大学 | A kind of dedusting of flue gas end takes off white system |
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