CN116717640A - Waterproof vapour is palirrheated flange subassembly and tail gas processing system - Google Patents
Waterproof vapour is palirrheated flange subassembly and tail gas processing system Download PDFInfo
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- CN116717640A CN116717640A CN202310613876.2A CN202310613876A CN116717640A CN 116717640 A CN116717640 A CN 116717640A CN 202310613876 A CN202310613876 A CN 202310613876A CN 116717640 A CN116717640 A CN 116717640A
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- 239000012530 fluid Substances 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 239000007921 spray Substances 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 3
- 238000005979 thermal decomposition reaction Methods 0.000 abstract description 13
- 238000003754 machining Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 35
- 238000011010 flushing procedure Methods 0.000 description 30
- 239000000428 dust Substances 0.000 description 25
- 230000000694 effects Effects 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000008021 deposition Effects 0.000 description 4
- 238000000197 pyrolysis Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/005—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Separating Particles In Gases By Inertia (AREA)
Abstract
The invention discloses a flange component capable of preventing reverse flow of steam and a tail gas treatment system, belongs to the technical field of tail gas treatment, and aims to solve the problems that in the prior art, a water film is unevenly covered on the inner wall of a reaction cavity, steam flows back to damage electronic elements in a flame generator in a thermal decomposition cavity, overflow branch pipes are additionally machined, machining removal amount is large, machining is complex, and machining efficiency is low. In the assembly, the fluid rotary flange comprises a flange base body, wherein an overflow groove is formed in the flange base body, the overflow hole penetrates through the side wall of the overflow groove, and the overflow groove is communicated with the fluid supply unit through the overflow hole; the flow guide baffle comprises a vertical ring and a transverse ring, the transverse ring is arranged above the overflow groove and has a first gap with the overflow groove, the vertical ring is arranged on the side wall of the flange base body and has a second gap with the side wall of the flange base body, and the first gap and the second gap are communicated to form a fluid channel between the water outlet of the fluid rotary flange and the reaction cavity. The invention can be used for tail gas treatment.
Description
Technical Field
The invention belongs to the technical field of tail gas treatment, and particularly relates to a flange assembly capable of preventing reverse flow of steam and a tail gas treatment system.
Background
The existing semiconductor tail gas treatment equipment generally comprises a thermal decomposition cavity and a reaction cavity which are sequentially arranged along the flowing direction of a tail body, a fluid rotary flange is arranged between the thermal decomposition cavity and the reaction cavity, a plurality of water inlets of the fluid rotary flange are connected with an overflow straight pipe, the axial direction of the overflow branch pipe is obliquely arranged relative to the radial direction of the fluid rotary flange, fluid with tangential velocity can be provided in the fluid rotary flange, and a rotary water curtain is formed.
However, on one hand, the problem that the water film covers unevenly on the inner wall of the reaction cavity exists due to the limited number of water outlets of the fluid rotary flange; meanwhile, as the reaction cavity is connected with the thermal decomposition cavity, the temperature at the top of the reaction cavity is higher, water vapor is inevitably generated, and the water vapor flows back into the thermal decomposition cavity and damages electronic elements in a flame generator in the thermal decomposition cavity.
On the other hand, as the overflow branch pipe is an independent component, the overflow branch pipe protrudes out of the outer wall of the flange base body to form a straight pipe structure, and the overflow branch pipe and the fluid rotary flange can be integrally formed, but the overflow branch pipe needs to be additionally processed in the processing process, so that the processing removal amount is large, the processing is complex, and the processing efficiency is low.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a flange assembly and a tail gas treatment system for preventing reverse flow of steam, which are used for solving at least one of the problems of uneven coverage of a water film on an inner wall of a reaction cavity, damage to electronic elements in a flame generator in a thermal decomposition cavity caused by reverse flow of steam, additional processing of overflow branch pipes, large processing removal amount and complex processing, and low processing efficiency in the prior art.
The aim of the invention is mainly achieved by the following technical scheme.
The invention provides a flange assembly for preventing reverse flow of steam, which comprises a fluid rotary flange and a flow guide baffle, wherein the fluid rotary flange comprises a flange base body, an overflow groove and an overflow hole; the upper surface of the flange base body is provided with an overflow groove, the overflow hole penetrates through the side wall of one side of the overflow groove far away from the central line of the flange base body, and the overflow groove is communicated with the fluid supply unit through the overflow hole; the flow guide baffle comprises a vertical ring and a transverse ring connected with the vertical ring, the transverse ring is arranged above the overflow groove and has a first gap with the overflow groove, the vertical ring is arranged on the side wall of the flange base body and has a second gap with the side wall of the flange base body, and the first gap and the second gap are communicated to form a fluid channel between the water outlet of the fluid rotary flange and the reaction cavity.
Further, the flange base is quadrilateral in shape.
Further, the water outlet flow rate of the overflow groove is 8-32L/min.
Further, the flange base member is including connecting gradually four limits that constitute the quadrangle, and every limit all includes connecting gradually first straight line section, transition arc section and second straight line section, and first straight line section and second straight line section are parallel with a central line of flange base member, and the distance between first straight line section and the central line is less than the distance between second straight line section and the central line, and the overflow aperture is seted up on first straight line section.
Further, the overflow hole includes a first straight pipe and a second straight pipe which are sequentially arranged along the fluid movement direction.
Further, the diameter of the first straight pipe is 10-12 mm, and the diameter of the second straight pipe is 6-8 mm.
Further, the length of the first straight pipe is 30-32 mm, and the length of the second straight pipe is 70-74 mm.
Further, the number of the overflow holes is 2-8, and a plurality of the overflow holes are uniformly distributed along the circumferential direction of the overflow groove.
The invention also provides a tail gas treatment device which comprises the flange assembly for preventing reverse flow of the waterproof steam.
Further, the device also comprises a dehumidifying cyclone device, an exhaust pipe and a spray tower connected with the air inlet of the exhaust pipe, wherein the dehumidifying cyclone device is arranged in the exhaust pipe or the spray tower.
Compared with the prior art, the invention can realize at least one of the following beneficial effects.
A) According to the flange assembly capable of preventing reverse flow of water vapor, on one hand, the gap between the flow guide baffle and the flange base body is used as the fluid channel between the water outlet of the fluid rotary flange and the reaction cavity, when fluid passes through the fluid channel, the fluid channel can be basically filled with a whole circle of fluid channel under the action of rotational flow, rotational flow fluid flowing out of the fluid channel can cover the inner wall of the reaction cavity more uniformly, dust particles are reduced to be accumulated on the side wall of the reaction cavity, and the reaction cavity is prevented from being blocked.
B) According to the flange assembly capable of preventing reverse flow of water vapor, the transverse ring is arranged, namely the cover is covered on the upper surface of the flange base body, so that water vapor on the upper surface of the flange base body can be reduced from flowing back to the thermal decomposition cavity, damage to electronic elements in a flame generator in the thermal decomposition cavity is caused by the water vapor flowing back, the upper part of a water curtain on the side wall of the reaction cavity can be shielded to a certain extent by the arrangement of the vertical ring, and damage to the electronic elements in the flame generator in the thermal decomposition cavity is also reduced by the water vapor flowing back to the upper surface of the fluid rotary flange.
C) According to the flange assembly capable of preventing reverse flow of water vapor, the flange base body is quadrilateral or approximately quadrilateral, the overflow holes penetrate through the side wall of the overflow groove on one side far away from the center line of the flange base body and are directly formed in the flange base body, so that in the machining process, quadrangular blanks can be directly adopted to machine the flange base body, then the upper surface of the flange base body is formed in the overflow groove, and the penetrating overflow holes are machined in the side wall of the overflow groove on one side far away from the center line of the flange base body, so that machining of the fluid rotary flange can be completed, the machining removal amount is small, the machining difficulty is low, and the machining efficiency can be greatly improved.
In the invention, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the embodiments of the invention particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.
Fig. 1 is a perspective view of a flange assembly for preventing reverse flow of steam according to a first embodiment of the present invention;
FIG. 2 is a top view of a flange assembly for preventing reverse flow of steam according to an embodiment of the present invention;
FIG. 3 is a radial cross-sectional view of a flange assembly for preventing reverse flow of steam according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fluid rotary flange in a flange assembly for preventing reverse flow of steam according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a baffle in a flange assembly for preventing reverse flow of steam according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a dehumidifying cyclone device in an exhaust gas treatment system according to a second embodiment of the present invention;
fig. 7 is a first schematic diagram of cooperation of an adjusting protrusion of a dehumidifying cyclone device, a second circular arc through hole and a blade in an exhaust gas treatment system according to a second embodiment of the present invention, wherein the blade is in a horizontal state;
fig. 8 is a second schematic diagram illustrating the cooperation of the adjusting protrusion, the second circular arc through hole and the blade of the dehumidifying cyclone device in the exhaust gas treatment system according to the second embodiment of the present invention, wherein the blade is in an inclined state;
fig. 9 is a schematic diagram illustrating connection between a dehumidifying cyclone device and an exhaust pipe and a spray tower in an exhaust gas treatment system according to a second embodiment of the present invention.
Reference numerals:
1-a vertical ring; 2-transverse rings; 3-a flange base; 4-an overflow trough; 5-overflow holes; 6-a second circular arc-shaped through hole; 7-flushing the assembly; 8-a dehumidifying component; 9-a second spherical hinge structure; 10-exhaust pipe; 11-a spray tower; 12-cyclone sheets; 121-an outer ring; 122-center column; 123-leaf; 13-adjusting the projections.
Detailed Description
The following detailed description of preferred embodiments of the invention is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the invention, are used to explain the principles of the invention and are not intended to limit the scope of the invention.
Example 1
The embodiment provides a flange assembly preventing reverse flow of steam, see fig. 1 to 5, including a fluid rotary flange and a diversion baffle, the fluid rotary flange includes a flange base 3, an overflow groove 4 and an overflow hole 5, the flange base 3 is quadrilateral (for example, rectangular or approximately rectangular), the overflow groove 4 is opened on the upper surface of the flange base 3, the overflow hole 5 penetrates through the side wall of the overflow groove 4 far away from the central line side of the flange base 3, the overflow groove 4 is communicated with the fluid supply unit through the overflow hole 5, the fluid inlet axis of the overflow hole 5 is inclined relative to the radial direction of the side wall of the overflow groove 4, the diversion baffle includes a vertical ring 1 and a transverse ring 2 connected with the vertical ring 1, the transverse ring 2 is arranged above the overflow groove 4 and has a first gap with the overflow groove 4, the vertical ring 1 is arranged on the side wall of the fluid rotary flange and has a second gap with the side wall of the flange base 3, and the first gap and the second gap are communicated to form a fluid channel between the water outlet of the fluid rotary flange and the reaction chamber.
Compared with the prior art, the flange component preventing reverse flow of steam is provided in the embodiment, on one hand, through setting up the baffle, the clearance between baffle and the flange base member 3 is as the fluid channel between the delivery port of fluid swivel flange and the reaction chamber, when fluid passes through this kind of fluid channel, can pack the fluid channel of full circle basically under the effect of whirl, the whirl fluid that flows from this fluid channel can cover the inner wall of reaction chamber more evenly, reduce dust particle and pile up the lateral wall at the reaction chamber, avoid the reaction chamber to block up.
On the other hand, the setting of horizontal ring 2 is equivalent to covering and establishing a lid on flange base member 3 upper surface, can reduce the steam of flange base member 3 upper surface and flow back to the pyrolysis chamber, and steam flow back causes the harm to the electronic component in the flame generator in the pyrolysis chamber, and the setting of vertical ring 1 can carry out certain shielding to the water curtain upper portion of reaction chamber lateral wall, can reduce the steam of fluid rotatory flange upper surface equally and flow back to the pyrolysis chamber, and steam flow back causes the harm to the electronic component in the flame generator in the pyrolysis chamber.
On the other hand, the shape of the flange base body 3 is quadrilateral, the overflow hole 5 penetrates through the side wall of the overflow groove 4, which is far away from the side of the center line of the flange base body 3, and is directly formed on the flange base body 3, so that in the processing process, the quadrilateral blank can be directly adopted to process the flange base body 3, then, the upper surface of the flange base body 3 is formed on the overflow groove 4, and the penetrating overflow hole 5 is processed on the side wall of the overflow groove 4, which is far away from the side of the center line of the flange base body 3, so that the processing of the fluid rotary flange can be completed, the processing removal amount is small, the processing difficulty is low, and the processing efficiency can be greatly improved.
Illustratively, to better cover the isopipe 4, the end of the transverse ring 2 remote from the side wall of the fluid rotating flange is 15-25 mm (e.g., 20 mm) radially beyond the isopipe 4.
In order to be able to form a more uniform curtain of water, the width of the overflow launder 4 in the radial direction is 20 to 30mm (e.g. 25 mm), considering that the width of the overflow launder 4 will directly affect the water supply rate.
Similarly, since the first gap and the second gap are communicated to form a fluid channel between the water outlet of the fluid rotary flange and the reaction chamber, correspondingly, the size of the fluid channel also directly influences the water supply speed, and the height of the first gap is 4-8 mm, and the radial width of the second gap is 4-8 mm.
By limiting the above dimensions, the flow rate of the rotational flow water curtain of the reaction chamber (i.e., the outflow rate of the overflow tank) can be basically ensured to be 8 to 32L/min (e.g., 16L/min), so that it is ensured that a uniform water curtain is formed.
Considering that the overflow hole 5 is provided on the flange base 3, the length of the overflow hole 5 may be too long, resulting in that the flow resistance in the overflow hole 5 is too large, therefore, the shape of the flange base 3 is approximately rectangular, which includes four sides sequentially connected to form a quadrangle, each side includes sequentially connected first straight line segments, transition arc segments and second straight line segments, the first straight line segments and the second straight line segments are parallel to a center line of the flange base 3, and the distance between the first straight line segments and the center line is smaller than the distance between the second straight line segments and the center line, and the overflow hole 5 is provided on the first straight line segments. Thus, by adopting the flange base body 3 of such a shape, the overflow hole 5 is opened on the first straight line section, and the length of the overflow hole 5 can be reduced on the basis of ensuring an appropriate processing removal amount, thereby reducing the flow resistance in the overflow hole 5.
From the viewpoint of flow resistance, the overflow aperture 5 has a length of 100 to 120mm, for example.
For the convenience of connection, the structure of the overflow hole 5, specifically, it includes a first straight pipe and a second straight pipe which are sequentially disposed in the fluid movement direction, the diameter of the first straight pipe being larger than that of the second straight pipe. In this way, the connector of the fluid supply unit can be conveniently inserted into the first straight tube, enabling connection of the fluid supply unit with the overflow aperture 5.
Likewise, from the viewpoint of flow resistance, the diameter ratio of the first straight tube to the second straight tube is 5 to 6:3 to 4.
Illustratively, the first straight tube has a diameter of 10 to 12mm and the second straight tube has a diameter of 6 to 8mm.
Correspondingly, the length ratio of the first straight pipe to the second straight pipe is 15-16: 35 to 37.
The length of the first straight tube is typically 30-32 m, and the length of the second straight tube is 70-74 mm.
In order to further improve the uniformity of the coating of the spiral fluid film on the inner wall of the chamber, the number of the overflow holes 5 is 2-8, 4 overflow holes 5 are selected from the viewpoint of layout, and the 4 overflow holes 5 are uniformly arranged along the circumferential direction of the overflow groove 4.
Example two
The embodiment provides a tail gas treatment device, including thermal decomposition chamber, reaction chamber and the reverse flow flange subassembly of waterproof vapour that embodiment one provided, thermal decomposition chamber passes through reverse flow flange subassembly of waterproof vapour and is connected with the reaction chamber.
Compared with the prior art, the beneficial effects of the tail gas treatment device provided by the embodiment are basically the same as those of the flange assembly preventing reverse flow of steam provided by the embodiment one, and are not repeated here.
It will be appreciated that, in order to be able to realize that the fluid rotary flange has the function of connecting two chambers, the upper end face of the flange base body 3 is provided with an upper connecting ring, the lower end face is provided with a lower connecting ring, the upper connecting ring is detachably and fixedly connected with the thermal decomposition chamber, the lower connecting ring is detachably and fixedly connected with the reaction chamber, and the upper connecting piece and the lower connecting piece are illustratively sealing rings or annular gaskets or the like.
From the installation and processing point of view, the upper connecting ring, the flange base body 3 and the lower connecting ring are coaxially arranged, and the upper connecting ring and the lower connecting ring are positioned at the outer side of the overflow groove 4, in this way, not only is it easy to install and process, but it is also possible to avoid interference between the upper and lower connecting rings with the fluid flowing out of the overflow launder 4.
In order to realize the exhaust gas after the treatment, it is understood that the exhaust gas treatment system further includes a dehumidifying cyclone device, an exhaust pipe 10, and a spray tower 11 connected to the air inlet of the exhaust pipe 10, see fig. 9, where the dehumidifying cyclone device, see fig. 6 to 8, includes a cyclone sheet 12, the cyclone sheet 12 is disposed at the air inlet of the exhaust pipe 10 or in a device connected to the air inlet of the exhaust pipe 10, the cyclone sheet 12 includes an outer ring 121, a central column 122 disposed in an inner ring area of the outer ring 121, and a plurality of blades 123 disposed between the outer ring 121 and the central column 122, a first end of each blade 123 is connected to the outer ring 121, and a second end of each blade 123 is connected to the central column 122, and the outer ring 121 is connected to an inner wall of the exhaust pipe 10 or an inner wall of a device connected to the air inlet of the exhaust pipe 10 (e.g., the spray tower 11).
Compared with the prior art, the dehumidifying cyclone device provided by the embodiment is provided with the cyclone sheet 12, so that when the tail gas after the treatment containing dust and liquid drops passes through the cyclone sheet 12, the movement direction of the liquid drops and dust particles can be changed, so that the liquid drops and the dust particles are in a spiral upward movement mode, under the action of centrifugal force, the liquid drops and the dust particles, especially the liquid drops and the dust particles with larger mass, can be gradually concentrated in the inner wall area of the exhaust pipe 10, and the concentrated liquid drops and the concentrated dust are gradually fused into large liquid drops and large dust particles, thereby realizing gas-liquid separation, reducing the dust and water vapor content in the entering exhaust gas, and reducing the occurrence of the condition that the exhaust pipe 10 is easy to be blocked due to the fact that the dust particles and the water vapor are mixed to form slurry.
From the viewpoint of the water vapor reduction effect, the number of the swirl plates 12 is 2 in the device connected to the air inlet of the exhaust pipe 10, one of the swirl plates 12 is provided at the air inlet end (i.e., lower end) of the device connected to the air inlet of the exhaust pipe 10, and the other is provided at the air outlet end (i.e., upper end) of the device connected to the air inlet of the exhaust pipe 10.
In order to ensure the dehumidification swirling effect, the size of the swirling sheet 12, the number and inclination angle of the blades 123, and the gas flow rate need to be comprehensively considered, and the outside diameter of the swirling sheet 12 is 100 to 300mm, the height of the swirling sheet 12 is 30 to 100mm, the number of the blades 123 is 8 to 20, the inclination angle of the blades 123 with respect to the radial plane is 45 to 75 °, and the gas flow rate is 2 to 8m/s, for example.
Considering that the inclination angle of the vane 123 relative to the radial plane may affect the rotational flow degree, in order to adjust the rotational flow degree according to the exhaust gas condition actually processed, the dehumidifying rotational flow device further includes an adjusting ring (not shown in the drawing) and a cylindrical adjusting protrusion 13, see fig. 7 to 8, the adjusting ring is rotatably sleeved on the outer wall of the exhaust pipe 10 or the outer wall of the device connected with the air inlet of the exhaust pipe 10, a first circular arc through hole (not shown in the drawing) with the spherical hinge structure of the second end as the center is formed on the outer ring 121, a second circular arc through hole 6 with the spherical hinge structure of the second end as the center is formed on the side wall of the exhaust pipe 10 or the side wall of the device connected with the air inlet of the exhaust pipe 10, the first circular arc through hole and the second circular arc through hole 6 are both disposed along the axial direction of the outer ring 121, and the first circular arc through hole coincides with the second circular arc through hole, the first end of the vane 123 is rotatably and fixedly connected with the outer ring 121, the second end of the vane 123 is rotatably and fixedly connected with the center post 122 through the second spherical hinge structure 9, one end of the adjusting protrusion 13 is rotatably connected with the second end of the vane 123, which sequentially passes through the first circular arc through the second circular arc through hole and the second circular arc through hole. This is because, the swirl plate 12 is located blast pipe 10 inner wall or the device inner wall of being connected with blast pipe 10 air inlet, can't directly adjust the angle of blade 123, through adjusting the setting of circle, adjusting protruding 13 and convex through-hole, through rotating the adjusting circle, drive adjusting protruding 13 along first convex through-hole and the upward or downward motion of second circular through-hole for the distance between the projection of the spherical hinge structure of adjusting protruding 13 and second end in radial plane changes, and the rotation of certain angle takes place for blade 123, thereby can adjust the inclination of blade 123 according to the tail gas condition of actual processing.
It should be noted that, due to the provision of the adjusting ring, it can cover the second circular arc-shaped through hole 6, so that the exhaust gas leakage does not substantially occur.
It should be noted that, when the tail gas after the dust and the liquid drops pass through the cyclone sheet 12, the tail gas inevitably collides with the blades 123, the outer ring 121 and the central column 122 of the cyclone sheet 12 and is deposited on the surface of the cyclone sheet 12, and if the tail gas is not cleaned, the cyclone sheet 12 is blocked, so that the exhaust pressure is high, and therefore, the dehumidifying cyclone device further includes a flushing assembly 7 disposed at the air outlet end of the cyclone sheet 12, and the water outlet of the flushing assembly 7 faces the cyclone sheet 12. Thus, when more dust is deposited on the cyclone sheet 12, the flushing assembly 7 can be started, and the dust on the cyclone sheet 12 is flushed by the water flow sprayed by the flushing assembly 7.
The structure of the flushing assembly 7 specifically comprises a plurality of flushing nozzles which are arranged in a plurality of layers, the water outlet shape of the flushing nozzles is columnar water flow, the number of the flushing nozzles in each layer is 1-3, and the flow rate of the flushing nozzles in each layer is 3-10 liters/min.
In order to automatically determine the deposition degree of the dust on the cyclone sheet 12, so that the flushing assembly 7 can be automatically opened, the dehumidifying cyclone device further comprises a flushing controller (not shown in the figure) and an infrared sensor (not shown in the figure), the projections of two adjacent blades 123 on the axial direction have an overlapping area, in the overlapping area, the transmitting end of the infrared sensor is arranged on one of the blades 123, the receiving end of the infrared sensor is arranged on the other blade 123, the positions of the transmitting end and the receiving end are corresponding, and the transmitting end, the flushing controller and the flushing assembly 7 are sequentially connected. When the method is implemented, the receiving end receives the signal sent by the transmitting end in real time and transmits the signal to the flushing controller, and once the flushing controller does not receive the signal sent by the receiving end within a time threshold range (for example, 5 seconds), the excessive deposition of dust on the cyclone sheet 12 is indicated, the flushing controller controls the flushing assembly 7 to be started, the cyclone sheet 12 is flushed, and the dust on the cyclone sheet 12 is flushed into the water tank.
Alternatively, the dehumidifying cyclone device further comprises a flushing controller (not shown) and a pressure sensor (not shown), wherein the pressure sensor is arranged on the blade 123, or the pressure sensor can be arranged at any position between the tail gas inlet and the air inlet end of the dehumidifying cyclone device. When the method is implemented, pressure data acquired by the pressure sensor in real time are sent to the flushing controller, the flushing controller judges whether the pressure data exceeds a pressure threshold value, if so, excessive dust deposition on the cyclone sheet 12 is indicated, the flushing controller controls the flushing assembly 7 to be started, the cyclone sheet 12 is flushed, and the dust on the cyclone sheet 12 is flushed into the water tank.
Considering that the water vapor content of the treated exhaust gas is inevitably increased by the flushing assembly 7 during the flushing of the rotary blade 12, in order to be able to reduce the effect of the flushing assembly 7 on the water vapor content, the following two ways may be used, for example:
in the first mode, the flushing assembly 7 is periodically sprayed, illustratively, on 1 time for 10 to 30 minutes.
Alternatively, a dehumidifying unit 8 (such as a dehumidifying cylinder and/or a dehumidifying nozzle) is disposed above the flushing unit 7, and a drying gas (such as dry compressed air or dry compressed nitrogen) is supplied to the exhaust pipe 10 or a device connected to the air inlet of the exhaust pipe 10 under the action of the negative pressure of the exhaust gas, so that the water vapor in the treated exhaust gas can be diluted, the water vapor content therein can be reduced, and the air can be suppliedPressure of 3 to 5kgf/cm 2 The air supply flow rate is 20-200L/min.
As for the number of the arrangement of the swirl plates 12 and the number of the layers of the blades 123 on each swirl plate 12, the following may be exemplified:
in a first mode, the dehumidifying cyclone device includes a cyclone sheet 12, and the number of layers of the blades 123 on the cyclone sheet 12 is 1.
In a second mode, the dehumidifying cyclone device includes a cyclone sheet 12, and the number of layers of the blades 123 on the cyclone sheet 12 is at least 2.
In a third mode, the dehumidifying cyclone device includes at least 2 cyclone sheets 12, and the number of layers of the blades 123 on each cyclone sheet 12 is 1.
In a fourth mode, the dehumidifying cyclone device includes at least 2 cyclone sheets 12, and the number of layers of the blades 123 on the cyclone sheets 12 is at least 2.
In addition, the second mode or the third mode may be selected in practical application from the viewpoint of dual effects of water-vapor separation, anti-blocking effect and simplification of structure.
In the practical application process, in order to ensure sufficient separation of water vapor from the perspective of the processed tail gas dust amount and flow resistance, the number of the cyclone sheets 12 and the number of layers of the blades 123 on each layer of the cyclone sheets 12 are also required to be adjusted, and specific parameters are shown in table 1.
TABLE 1 correspondence table of dust amount and number of cyclone sheets and number of layers of blades on each layer of cyclone sheet
| Dust amount | Number of cyclone sheets | Number of blades per blade |
| Less than 100mg/m 3 | 2 pieces of | 1-2 layers |
| 100～2000mg/m 3 | 1 number of | Layer 1 |
| Over 2000mg/m 3 | 1 number of | Layer 1 |
In the technical field of exhaust gas treatment, it is generally considered that the greater the number of treatment devices, the more advantageous the effect is, however, this embodiment has found that when the amount of dust in the treated exhaust gas exceeds 100mg/m 3 After that, the increase of the number of the cyclone sheets 12 can affect the flow of the tail gas after treatment, which is unfavorable for improving the effect.
In order to avoid excessive dust deposition on the cyclone sheets 12, at least one flushing assembly 7 needs to be arranged above each cyclone sheet 12.
In order to facilitate the observation of the water vapor reduction effect, a transparent observation window is provided at the position corresponding to the cyclone sheet 12 on the inner wall of the exhaust pipe 10 or the side wall of the device connected with the air inlet of the exhaust pipe 10, and the dust condition and the water vapor separation effect on the cyclone sheet 12 can be clearly observed through the observation window.
Through tests, the dehumidifying cyclone device with the structure has the advantages that the spraying amount of the flushing assembly 7 is 7 liters/min, the flow rate of the treated tail gas is 4000 liters/min, and when the air supply flow rate of the dehumidifying assembly 8 is 150 liters/min, the water vapor content of the treated tail gas can be reduced to one third of the original water vapor content according to the exhaust temperature of 30 ℃.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The flange assembly for preventing reverse flow of steam is characterized by comprising a fluid rotary flange and a flow guide baffle, wherein the fluid rotary flange comprises a flange base body, an overflow groove and an overflow hole;
the upper surface of the flange base body is provided with an overflow groove, the overflow hole penetrates through the side wall of one side of the overflow groove, which is far away from the center line of the flange base body, and the overflow groove is communicated with the fluid supply unit through the overflow hole;
the flow guide baffle comprises a vertical ring and a transverse ring connected with the vertical ring, wherein the transverse ring is arranged above the overflow groove and has a first gap with the overflow groove, the vertical ring is arranged on the side wall of the flange base body and has a second gap with the side wall of the flange base body, and the first gap and the second gap are communicated to form a fluid channel between a water outlet of the fluid rotary flange and the reaction cavity.
2. The flange assembly according to claim 1, wherein the flange base is quadrilateral in shape.
3. The flange assembly according to claim 1, wherein the overflow channel has a water outlet flow rate of 8-32L/min.
4. The flange assembly according to claim 1, wherein the overflow hole comprises a first straight pipe and a second straight pipe disposed in sequence along a fluid movement direction.
5. The flange assembly according to claim 4, wherein the first straight pipe has a diameter of 10 to 12mm and the second straight pipe has a diameter of 6 to 8mm.
6. The flange assembly according to claim 4, wherein the first straight tube has a length of 30 to 32mm and the second straight tube has a length of 70 to 74mm.
7. The flange assembly according to claim 1, wherein the flange base includes four sides connected in sequence to form a quadrilateral, each side including a first straight line segment, a transition arc segment, and a second straight line segment connected in sequence, the first straight line segment and the second straight line segment being parallel to a center line of the flange base, a distance between the first straight line segment and the center line being smaller than a distance between the second straight line segment and the center line, and the overflow hole being opened in the first straight line segment.
8. The flange assembly according to claim 1, wherein the number of the overflow holes is 2 to 8, and the plurality of overflow holes are uniformly arranged along the circumferential direction of the overflow groove.
9. An exhaust gas treatment device comprising a flange assembly according to any one of claims 1 to 8 that is resistant to reverse flow of steam.
10. The exhaust gas treatment device according to claim 9, further comprising a dehumidifying cyclone device, an exhaust pipe, and a spray tower connected to an air inlet of the exhaust pipe, wherein the dehumidifying cyclone device is provided in the exhaust pipe or in the spray tower.
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| CN202310613876.2A CN116717640B (en) | 2023-05-29 | 2023-05-29 | Waterproof vapour is palirrheated flange subassembly and tail gas processing system |
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| CN202310613876.2A CN116717640B (en) | 2023-05-29 | 2023-05-29 | Waterproof vapour is palirrheated flange subassembly and tail gas processing system |
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