CN113551534A - Air inlet channel, gravity dust remover, pre-dust removing method and dust removing system - Google Patents
Air inlet channel, gravity dust remover, pre-dust removing method and dust removing system Download PDFInfo
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- CN113551534A CN113551534A CN202110816862.1A CN202110816862A CN113551534A CN 113551534 A CN113551534 A CN 113551534A CN 202110816862 A CN202110816862 A CN 202110816862A CN 113551534 A CN113551534 A CN 113551534A
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- 239000000428 dust Substances 0.000 title claims abstract description 129
- 230000005484 gravity Effects 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002826 coolant Substances 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 6
- 238000005453 pelletization Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 27
- 239000007789 gas Substances 0.000 description 15
- 238000001914 filtration Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003034 coal gas Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
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- F27D17/004—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/02—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
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- F27D17/008—
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Abstract
The invention discloses an air inlet channel, a gravity dust collector, a pre-dust collection method and a dust collection system. The technical scheme is as follows: the air inlet channel of the gravity dust collector is provided with a first channel and a second channel which are sequentially connected, and the cross section size of the outlet end of the second channel is larger than that of the inlet end; the first channel is surrounded by a first heat exchange structure.
Description
Technical Field
The invention relates to the technical field of gravity dust collectors, in particular to an air inlet channel, a gravity dust collector, a pre-dust collection method and a dust collection system.
Background
The general process flow of the traditional submerged arc furnace high-temperature flue gas purification is as follows: high-temperature flue gas generated by the submerged arc furnace enters gas (with the temperature of 800-1000 ℃) in a rear-end dedusting process pipe section, is cooled to about 450 ℃ through a water cooling flue, then enters a pre-deduster for pre-dedusting and a fine deduster for fine dedusting, clean coal gas (about 350 ℃) after dedusting is cooled to about 200 ℃ through an air cooler, is conveyed backwards through a high-temperature coal gas fan, and is finally cooled to about 60 ℃ through a clean coal gas cooler and conveyed to the next procedure or is ignited for emission.
Because the system runs for a long time, dust accumulation and wall surface pollution aggravation can not occur on the inner wall of the water-cooling flue. The heat exchange coefficient of the water-cooling flue is continuously reduced due to dust accumulation, the outlet temperature of the water-cooling flue is greatly higher than the design parameter value (450 ℃), and the highest temperature can reach 550 ℃.
The increase of the temperature of the outlet of the water-cooling flue can have adverse effect on the operation of equipment (a gravity dust collector, a fine dust collector and the like) at the rear end of the water-cooling flue, and particularly, the air inlet temperature of the fine dust collector is increased, so that the filtering air speed of the fine dust collector is greatly increased, and the filtering precision is obviously reduced. After the situation occurs, the furnace can only be shut down for ash removal or the measure for reducing the load of the submerged arc furnace is adopted for treatment, so that the continuous generation of a factory is influenced, and larger economic loss is brought.
Disclosure of Invention
In a first aspect, the present invention is directed to provide an air inlet channel of a gravity dust collector, where the air inlet channel has a heat exchange structure, and is capable of reducing an outlet air temperature of the gravity dust collector, so as to provide an inlet air suitable for a temperature required by a subsequent fine dust collector, and solve a technical problem in the prior art that a filtering precision of the fine dust collector is significantly reduced due to a high inlet air temperature.
In a second aspect, the present invention is directed to provide a gravity dust collector, which is capable of reducing an outlet air temperature of the gravity dust collector by heat exchange when the outlet air temperature of a water-cooled flue at a front end of the gravity dust collector increases, so as to avoid or reduce an influence of an inlet air temperature on a fine dust collector, and solve a technical problem in the prior art that a filtering precision of the fine dust collector is significantly reduced due to a high inlet air temperature.
In a third aspect, the present invention aims to provide a pre-dust removal method, which can perform adaptive processing in response to an excessively high outlet air temperature or inlet air temperature of a gravity dust collector, so as to ensure that the outlet air temperature of the gravity dust collector is within a required range, and solve the technical problem of significantly reduced filtration precision of a fine dust collector due to a high inlet air temperature in the prior art.
In a fourth aspect, the present invention is directed to provide a dust removal system, which can control an intake air temperature of a fine dust collector, ensure stability of a filtering precision of the fine dust collector, and solve a technical problem in the prior art that the filtering precision of the fine dust collector is significantly reduced due to a high intake air temperature.
In order to achieve the above object, according to a first aspect of the present invention, three kinds of intake passages of a gravity dust collector are provided.
The first technical scheme of the air inlet channel of the gravity dust collector is as follows:
the air inlet channel of the gravity dust collector is provided with a first heat exchange structure; the first heat exchange structure is provided with a heat exchange cavity, the axis of the heat exchange cavity is spiral, and a first channel for flowing of dust-containing gas is formed on the inner side of the heat exchange cavity.
Furthermore, the axis of the heat exchange cavity is in a cylindrical spiral line shape, and the spiral angle alpha of the spiral line is 50-80 degrees; and/or the first heat exchange structure is provided with a coiled heat exchange pipe, and the heat exchange cavity is formed inside the heat exchange pipe.
Furthermore, the first heat exchange structure is only formed by tightly winding, sealing and fixing heat exchange pipelines; or, the first heat exchange structure is further provided with a first support cylinder, the heat exchange pipeline is wound along the outer wall of the first support cylinder, and the first channel is arranged inside the first support cylinder.
Further, the pipe diameter of the heat exchange pipeline is 70-100 mm; the lower end of the heat exchange pipeline is connected with the cooling medium inlet, and the upper end of the heat exchange pipeline is connected with the cooling medium outlet.
Further, the air inlet passage also comprises a second passage connected with the outlet end of the first passage, and the cross-sectional dimension of the outlet end of the second passage is larger than that of the inlet end.
Further, the air inlet channel further comprises a second heat exchange structure, and the second heat exchange structure surrounds the second channel; and/or the inner diameter of the first channel is 300-800 mm, and the inner diameter of the outlet end of the second channel is 1000-1500 mm.
Further, the second heat exchange structure comprises: the upper water collecting pipe is annular and is arranged at the inlet end of the second channel; the lower water collecting pipe is annular and is arranged at the outlet end of the second channel; the upper ends of the heat exchange branch pipes are connected with the upper water collecting pipe, the lower ends of the heat exchange branch pipes are connected with the lower water collecting pipe, and the number of the heat exchange branch pipes is multiple; and the heat exchange branch pipe is arranged outside the second supporting cylinder, and the second channel is arranged inside the second supporting cylinder.
Further, the pipe diameters of the upper water collecting pipe and the lower water collecting pipe are 90-120 mm; the pipe diameter of the heat exchange branch pipe is 15-35 mm.
Furthermore, the lower water collecting pipe is connected with the cooling medium inlet, and the upper water collecting pipe is connected with the cooling medium outlet
Further, still include the first connecting portion of locating between last water-collecting pipe and the heat exchange pipeline.
The second technical scheme of the air inlet channel of the gravity dust collector is as follows:
the air inlet channel of the gravity dust collector is provided with a first heat exchange structure; the first heat exchange structure is provided with a heat exchange cavity, the axis of the heat exchange cavity is vertically arranged, and a first channel for flowing of dust-containing gas is formed on the inner side of the heat exchange cavity.
Further, the first heat exchange structure comprises: the upper main pipe is annular and is arranged at the inlet end of the first channel; the lower main pipe is annular and is arranged at the outlet end of the first channel; the heat exchange cavity is formed inside the vertical pipe, the upper end of the vertical pipe is connected with the upper header pipe, the lower end of the vertical pipe is connected with the lower header pipe, and the vertical pipes are multiple and enclose the first channel.
Further, the pipe diameters of the upper main pipe and the lower main pipe are 90-120 mm; the pipe diameter of the vertical pipe is 70-100 mm.
Further, the side walls of the adjacent vertical pipes are connected in a sealing way; or the first heat exchange structure further comprises a first supporting cylinder, the vertical pipe is arranged outside the first supporting cylinder, and the first channel is arranged inside the first supporting cylinder.
Further, the air inlet passage also comprises a second passage connected with the outlet end of the first passage, and the cross-sectional dimension of the outlet end of the second passage is larger than that of the inlet end.
Further, the air inlet channel further comprises a second heat exchange structure, and the second heat exchange structure surrounds the second channel; the internal diameter of the first channel is 300-800 mm, and the internal diameter of the outlet end of the second channel is 1000-1500 mm.
Further, the second heat exchange structure comprises: the lower water collecting pipe is annular and is horizontally arranged at the outlet end of the second channel; the upper ends of the heat exchange branch pipes are connected with the lower header pipe, the lower ends of the heat exchange branch pipes are connected with the lower water collecting pipe, and the number of the heat exchange branch pipes is multiple; and the heat exchange branch pipe is arranged outside the second supporting cylinder, and the second channel is arranged inside the second supporting cylinder.
Furthermore, the heat exchange branch pipes are provided with inclined pipes and vertical pipes which are arranged from top to bottom in sequence.
Further, the pipe diameters of the upper water collecting pipe and the lower water collecting pipe are 90-120 mm; the pipe diameter of the heat exchange branch pipe is 15-35 mm.
Further, the lower header pipe is connected to the cooling medium inlet, and the upper header pipe and the lower header pipe are connected to the cooling medium outlet.
The third kind of gravity dust collector has the following technical scheme:
the air inlet channel of the gravity dust collector is provided with a first channel and a second channel which are sequentially connected, and the cross section size of the outlet end of the second channel is larger than that of the inlet end; the first channel is surrounded by a first heat exchange structure.
Furthermore, the first heat exchange structure is provided with a heat exchange cavity, the axis of the heat exchange cavity is spirally or vertically arranged, and a first channel is formed on the inner side of the heat exchange cavity; and/or the second channel is surrounded by a second heat exchange structure.
Furthermore, the axis of the heat exchange cavity is in a cylindrical spiral line shape, and the spiral angle alpha of the spiral line is 50-80 degrees; and/or the first heat exchange structure is provided with a coiled heat exchange pipe, and the heat exchange cavity is formed inside the heat exchange pipe.
Furthermore, the first heat exchange structure is only formed by tightly winding, sealing and fixing heat exchange pipelines; or, the first heat exchange structure is further provided with a first support cylinder, the heat exchange pipeline is wound along the outer wall of the first support cylinder, and the first channel is arranged inside the first support cylinder.
Further, the first heat exchange structure comprises: the upper main pipe is annular and is arranged at the inlet end of the first channel; the lower main pipe is annular and is arranged at the outlet end of the first channel; the heat exchange cavity is formed inside the vertical pipe, the upper end of the vertical pipe is connected with the upper header pipe, the lower end of the vertical pipe is connected with the lower header pipe, and the vertical pipes are multiple and enclose the first channel.
Further, the side walls of the adjacent vertical pipes are connected in a sealing way; or the first heat exchange structure further comprises a first supporting cylinder, the vertical pipe is arranged outside the first supporting cylinder, and the first channel is arranged inside the first supporting cylinder.
In order to achieve the above object, according to a second aspect of the present invention, there is provided a gravity dust collector. The gravity dust collector is provided with the air inlet channel.
Furthermore, the gravity dust collector is also provided with a temperature sensor, a controller and an electromagnetic valve, wherein the temperature controller is used for detecting the air inlet temperature or the air outlet temperature of the gravity dust collector, the electromagnetic valve is arranged on a conveying pipeline of a cooling medium, and when the air outlet temperature or the air inlet temperature is higher than a preset value, the controller automatically controls the electromagnetic valve to be opened.
In order to achieve the above object, according to a third aspect of the present invention, there is provided a pre-dust removing method. The pre-dedusting method comprises the following steps: by adopting the gravity dust collector, when the outlet air temperature or the inlet air temperature of the gravity dust collector is higher than a preset value, a cooling medium is input into the heat exchange structure.
In order to achieve the above object, according to a fourth aspect of the present invention, there is provided a dust removing system. The dust removal system comprises the gravity dust remover and a fine dust remover arranged at the rear end of the gravity dust remover.
The invention is further described with reference to the following figures and detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to assist in understanding the invention, and are included to explain the invention and their equivalents and not limit it unduly. In the drawings:
fig. 1 is a schematic structural view of an air intake passage of a gravity dust collector according to a first embodiment of the present invention.
Fig. 2 is a schematic structural view of an air inlet passage of a gravity dust collector according to a second embodiment of the present invention.
Fig. 3 is a schematic structural view of an air intake passage of a gravity dust collector according to a third embodiment of the present invention.
Fig. 4 is a schematic structural view of an air intake passage of a gravity dust collector according to a fourth embodiment of the present invention.
Fig. 5 is a sectional view taken along line a-a of fig. 4.
Fig. 6 is a schematic structural view of an air inlet passage of a gravity dust collector according to a fifth embodiment of the present invention.
Fig. 7 is a sectional view taken along line B-B of fig. 6.
Fig. 8 is a schematic structural view of an air intake passage of a gravity dust collector according to a sixth embodiment of the present invention.
Fig. 9 is a schematic structural view of an intake passage of a gravity dust collector according to a seventh embodiment of the present invention.
Fig. 10 is a schematic structural view of an air intake passage of a gravity dust collector according to an eighth embodiment of the present invention.
Fig. 11 is a cross-sectional view taken along line C-C of fig. 10.
Fig. 12 is a schematic structural diagram of a gravity dust collector according to a first embodiment of the present invention.
Fig. 13 is a schematic structural diagram of a gravity dust collector according to a second embodiment of the present invention.
The relevant references in the above figures are:
100-heat exchange cavity, 210-first channel, 220-second channel, 300-heat exchange pipe, 410-first support cylinder, 420-second support cylinder, 430-first connecting part, 440-second connecting part, 510-cooling medium inlet, 520-cooling medium outlet, 610-upper water collecting pipe, 620-lower water collecting pipe, 630-heat exchange branch pipe, 710-upper header pipe, 720-lower header pipe, 730-vertical pipe, 810-temperature sensor, 820-controller and 830-solenoid valve.
Detailed Description
The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before the present invention is described in detail with reference to the accompanying drawings, it is to be noted that:
the technical solutions and features provided in the present invention in the respective sections including the following description may be combined with each other without conflict.
Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
With respect to terms and units in the present invention. The terms "comprising," "having," and any variations thereof in the description and claims of this invention and the related sections are intended to cover non-exclusive inclusions.
Fig. 1 is a schematic structural view of an air intake passage of a gravity dust collector according to a first embodiment of the present invention.
As shown in fig. 1, the first embodiment of the air inlet channel of the gravity dust collector has a first heat exchange structure; the first heat exchange structure has a heat exchange cavity 100, an axis of the heat exchange cavity 100 is spiral, and a first channel 210 for flowing of the dust-containing gas is formed inside the heat exchange cavity 100. Therefore, when the dust-containing gas flows in the first channel 210, the dust-containing gas exchanges heat with the cooling medium flowing in the heat exchange cavity 100, and the outlet gas temperature of the gravity dust collector is prevented from being too high.
The axis of the heat exchange cavity 100 is specifically in the shape of a cylindrical spiral line, the spiral angle alpha of the spiral line is 50-80 degrees, the first heat exchange structure is provided with a wound heat exchange pipeline 300, and the heat exchange cavity 100 is formed inside the heat exchange pipeline 300. Therefore, the processing and the manufacturing are convenient.
The first heat exchange structure is formed by tightly winding and sealing and fixing a heat exchange pipeline 300, and the pipe diameter of the heat exchange pipeline 300 is 70-100 mm. Therefore, the heat exchange efficiency is high. When winding, the heat exchange pipe 300 may be wound along the outside of the cylinder or barrel, and the cylinder or barrel may be drawn out after winding and fixing are completed. At this time, in order to facilitate connection with the pipeline at the rear end of the output end, a first connection portion 430 is provided at the output end; to facilitate connection with the pipe at the front end of the input end, a second connection portion 440 is provided at the input end.
The heat exchange tube 300 is connected at a lower end thereof to a cooling medium inlet 510 and at an upper end thereof to a cooling medium outlet 520. Therefore, the cooling medium is in countercurrent contact with the dust-containing gas, and the heat exchange efficiency is high.
Fig. 2 is a schematic structural view of an air inlet passage of a gravity dust collector according to a second embodiment of the present invention.
The second embodiment of the air intake passage of the gravity dust collector has differences compared with the first embodiment in that: as shown in fig. 2, the first heat exchange structure further has a first support cylinder 410, the heat exchange pipe 300 is wound along an outer wall of the first support cylinder 410, and the first channel 210 is inside the first support cylinder 410. At this time, the heat exchange pipe 300 does not need to be tightly wound, sealing and fixing processes are reduced, and production efficiency is improved.
Fig. 3 is a schematic structural view of an air intake passage of a gravity dust collector according to a third embodiment of the present invention.
In addition to the first and second embodiments, the third embodiment of the air intake passage of the gravity dust collector further has: as shown in fig. 3, the intake passage further includes a second passage 220 connected to the outlet end of the first passage 210, the outlet end of the second passage 220 having a cross-sectional size larger than that of the inlet end; the inner diameter of the first channel 210 is 300-800 mm, and the inner diameter of the outlet end of the second channel 220 is 1000-1500 mm. Therefore, the second channel 220 can reduce the flow velocity of the dust-containing gas and improve the dust settling effect.
Fig. 4 is a schematic structural view of an air intake passage of a gravity dust collector according to a fourth embodiment of the present invention.
Fig. 5 is a sectional view taken along line a-a of fig. 4.
In addition to the third embodiment, the fourth embodiment of the intake passage of the gravity dust collector further has: as shown in fig. 4-5, the air inlet passage further comprises a second heat exchange structure, and the second heat exchange structure encloses the second passage 220; the second heat exchange structure comprises an upper water collecting pipe 610, a lower water collecting pipe 620, heat exchange branch pipes 630 and a second supporting cylinder 420; the upper header 610 is annular and is disposed at the inlet end of the second channel 220; the lower water collecting pipe 620 is annular and is disposed at the outlet end of the second channel 220; the upper end of the heat exchange branch pipe 630 is connected with the upper water collecting pipe 610, the lower end is connected with the lower water collecting pipe 620, and a plurality of heat exchange branch pipes 630 are provided; the heat exchange branch pipe 630 is arranged outside the second supporting cylinder 420, and the second channel 220 is arranged inside the second supporting cylinder 420; the pipe diameters of the upper water collecting pipe 610 and the lower water collecting pipe 620 are 90-120 mm; the pipe diameter of the heat exchange branch pipe 630 is 15-35 mm; the lower header 620 is connected to the cooling medium inlet 510, and the upper header 610 is connected to the cooling medium outlet 520. Therefore, the heat exchange effect is improved, and the outlet temperature of the gravity dust collector is ensured within the design range.
Fig. 6 is a schematic structural view of an air inlet passage of a gravity dust collector according to a fifth embodiment of the present invention.
Fig. 7 is a sectional view taken along line B-B of fig. 6.
As shown in fig. 6 to 7, the fifth embodiment of the air inlet passage of the gravity dust collector has a first heat exchange structure; the first heat exchange structure is provided with a heat exchange cavity 100, the axis of the heat exchange cavity 100 is vertically arranged, and a first channel 210 for dust-containing gas to flow is formed inside the heat exchange cavity 100. Therefore, when the dust-containing gas flows in the first channel 210, the dust-containing gas exchanges heat with the cooling medium flowing in the heat exchange cavity 100, and the outlet gas temperature of the gravity dust collector is prevented from being too high.
The first heat exchange structure specifically comprises an upper header pipe 710, a lower header pipe 720 and vertical pipes 730; the upper manifold 710 is annular and disposed at the inlet end of the first channel 210; the lower manifold 720 is annular and disposed at the outlet end of the first channel 210; the heat exchange cavity 100 is formed inside the vertical tubes 730, the upper ends of the vertical tubes 730 are connected with the upper header pipe 710, the lower ends of the vertical tubes 730 are connected with the lower header pipe 720, and the vertical tubes 730 are multiple and enclose the first channel 210; the pipe diameters of the upper main pipe 710 and the lower main pipe 720 are 90-120 mm; the pipe diameter of the vertical pipe 730 is 70-100 mm; the lower manifold 720 is connected to the cooling medium inlet 510, and the upper manifold 710 is connected to the cooling medium outlet 520.
When the side walls of the adjacent vertical tubes 730 are connected in a sealing manner, the heat exchange effect is high.
Fig. 8 is a schematic structural view of an air intake passage of a gravity dust collector according to a sixth embodiment of the present invention.
The sixth embodiment of the intake passage of the gravity dust collector has differences from the fifth embodiment in that: as shown in fig. 8, the first heat exchange structure further includes a first supporting cylinder 410, the vertical tube 730 is disposed outside the first supporting cylinder 410, and the first channel 210 is disposed inside the first supporting cylinder 410. At this moment, need not closely to arrange and sealed between the vertical pipe 730, reduce manufacturing procedure, promote production efficiency.
Fig. 9 is a schematic structural view of an intake passage of a gravity dust collector according to a seventh embodiment of the present invention.
In addition to the fifth and sixth embodiments, the seventh embodiment of the air intake passage of the gravity dust collector further has: as shown in fig. 9, the intake passage further includes a second passage 220 connected to the outlet end of the first passage 210, the outlet end of the second passage 220 having a larger cross-sectional size than the inlet end; the inner diameter of the first channel 210 is 300-800 mm, and the inner diameter of the outlet end of the second channel 220 is 1000-1500 mm. Therefore, the second channel 220 can reduce the flow velocity of the dust-containing gas and improve the dust settling effect.
Fig. 10 is a schematic structural view of an air intake passage of a gravity dust collector according to an eighth embodiment of the present invention. Fig. 11 is a cross-sectional view taken along line C-C of fig. 10.
In addition to the seventh embodiment, the eighth embodiment of the intake passage of the gravity dust collector further has: as shown in fig. 10-11, the air inlet passage further comprises a second heat exchange structure, which encloses the second passage 220; the second heat exchange structure comprises a lower water collecting pipe 620, heat exchange branch pipes 630 and a second supporting cylinder 420; the lower water collecting pipe 620 is annular and is disposed at the outlet end of the second channel 220; the upper ends of the heat exchange branch pipes 630 are connected with the lower header pipe 720, the lower ends of the heat exchange branch pipes 630 are connected with the lower water collecting pipe 620, and a plurality of heat exchange branch pipes 630 are arranged; the heat exchange branch pipe 630 is arranged outside the second supporting cylinder 420, and the second channel 220 is arranged inside the second supporting cylinder 420; the pipe diameter of the lower water collecting pipe 620 is 90-120 mm; the pipe diameter of the heat exchange branch pipe 630 is 15-35 mm; the lower manifold 720 is connected to the cooling medium inlet 510, and the upper manifold 710 and the lower header 620 are connected to the cooling medium outlet 520. Therefore, the heat exchange effect is improved, and the outlet temperature of the gravity dust collector is ensured within the design range.
In the eighth embodiment of the air inlet passage of the gravity dust collector, the heat exchange branch pipe 630 has an inclined pipe and a vertical pipe which are arranged in sequence from top to bottom, as compared with the fourth embodiment, thereby facilitating the connection of the heat exchange branch pipe 630 and the lower water collecting pipe 620.
Fig. 12 is a schematic structural diagram of a gravity dust collector according to a first embodiment of the present invention.
As shown in fig. 12, the first embodiment of the gravity dust collector has the intake passage of any one of the above embodiments.
Fig. 13 is a schematic structural diagram of a gravity dust collector according to a second embodiment of the present invention.
In addition to the first embodiment, a second embodiment of the gravity dust collector further includes: as shown in fig. 13, the gravity dust collector further has a temperature sensor 810, a controller 820 and a solenoid valve 830, the temperature controller 820 is used for detecting the inlet air temperature or the outlet air temperature of the gravity dust collector, the solenoid valve 830 is arranged on the conveying pipeline of the cooling medium, and when the outlet air temperature or the inlet air temperature is higher than a preset value, the controller 820 automatically controls the solenoid valve 830 to open, so that the cooling medium flows into the heat exchange structure to exchange heat with the dust-containing gas.
The heat exchange structure can be any of a first heat exchange structure and a second heat exchange structure according to the required heat exchange efficiency. The number of the solenoid valves 830 is set according to the specific selection of the heat exchange structure.
The specific implementation mode of the pre-dedusting method comprises the following steps: by adopting the gravity dust collector of any one of the above embodiments, when the outlet air temperature or the inlet air temperature of the gravity dust collector is higher than a preset value, the cooling medium is input into the heat exchange structure.
The specific embodiment of the dust removing system of the invention comprises the gravity dust remover of any one of the embodiments and a fine dust remover arranged at the rear end of the gravity dust remover.
The contents of the present invention have been explained above. Those skilled in the art will be able to implement the invention based on these teachings. All other embodiments, which can be derived by a person skilled in the art from the above description without inventive step, shall fall within the scope of protection of the present invention.
Claims (10)
1. Air inlet channel of gravity dust remover, its characterized in that:
the air inlet channel is provided with a first channel (210) and a second channel (220) which are connected in sequence, and the cross section size of the outlet end of the second channel (220) is larger than that of the inlet end;
the first channel (210) is surrounded by a first heat exchange structure.
2. An air inlet passage for a gravity dust collector as claimed in claim 1, wherein: the first heat exchange structure is provided with a heat exchange cavity (100), the axis of the heat exchange cavity (100) is spirally or vertically arranged, and a first channel (210) is formed on the inner side of the heat exchange cavity (100); and/or the second channel (220) is surrounded by a second heat exchange structure.
3. An air intake passage of a gravity dust collector as set forth in claim 2, wherein: the axis of the heat exchange cavity (100) is in a cylindrical spiral line shape, and the spiral angle alpha of the spiral line is 50-80 degrees; and/or the first heat exchange structure is provided with coiled heat exchange pipes (300), and the heat exchange pipes (300) internally form the heat exchange cavity (100).
4. An air inlet passage for a gravity dust collector as claimed in claim 3, wherein: the first heat exchange structure is formed by tightly winding, sealing and fixing a heat exchange pipeline (300); or, the first heat exchange structure is also provided with a first support cylinder (410), the heat exchange pipe (300) is wound along the outer wall of the first support cylinder (410), and the first channel (210) is arranged inside the first support cylinder (410).
5. An air intake passage of a gravity dust collector as set forth in claim 2, wherein: the first heat exchange structure includes:
the upper header pipe (710), the upper header pipe (710) is annular and is placed at the inlet end of the first channel (210);
the lower manifold (720), the lower manifold (720) takes the form of a ring and is placed at the outlet end of the first channel (210);
the heat exchange cavity (100) is formed inside the vertical pipe (730), the upper end of the vertical pipe (730) is connected with the upper header pipe (710), the lower end of the vertical pipe (730) is connected with the lower header pipe (720), and the vertical pipe (730) is a plurality of and encloses into the first channel (210).
6. An air inlet passage for a gravity dust collector as claimed in claim 5, wherein: the side walls of the adjacent vertical pipes (730) are connected in a sealing way; or, the first heat exchange structure further comprises a first support cylinder (410), the vertical tube (730) is arranged outside the first support cylinder (410), and the first channel (210) is arranged inside the first support cylinder (410).
7. Gravity dust remover, its characterized in that: having an inlet channel according to one of claims 1 to 6.
8. The gravity dust collector as claimed in claim 7, wherein: the gravity dust collector is also provided with a temperature sensor (810), a controller (820) and an electromagnetic valve (830), wherein the temperature controller (820) is used for detecting the air inlet temperature or the air outlet temperature of the gravity dust collector, the electromagnetic valve (830) is arranged on a conveying pipeline of a cooling medium, and when the air outlet temperature or the air inlet temperature is higher than a preset value, the controller (820) automatically controls the electromagnetic valve (830) to be opened.
9. The pre-dedusting method comprises the following steps: with the gravity dust collector of claim 7 or 8, when the outlet air temperature or the inlet air temperature of the gravity dust collector is higher than a preset value, a cooling medium is fed into the heat exchange structure.
10. Dust pelletizing system, its characterized in that: comprising a gravity dust collector according to claim 7 or 8 and a fine dust collector provided at the rear end of the gravity dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110816862.1A CN113551534A (en) | 2021-07-20 | 2021-07-20 | Air inlet channel, gravity dust remover, pre-dust removing method and dust removing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110816862.1A CN113551534A (en) | 2021-07-20 | 2021-07-20 | Air inlet channel, gravity dust remover, pre-dust removing method and dust removing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113551534A true CN113551534A (en) | 2021-10-26 |
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