CN110711446A - A ceramic membrane subassembly for desorption flue gas particulate matter - Google Patents
A ceramic membrane subassembly for desorption flue gas particulate matter Download PDFInfo
- Publication number
- CN110711446A CN110711446A CN201911084053.5A CN201911084053A CN110711446A CN 110711446 A CN110711446 A CN 110711446A CN 201911084053 A CN201911084053 A CN 201911084053A CN 110711446 A CN110711446 A CN 110711446A
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- ceramic membrane
- flue gas
- water tank
- flange plate
- water chamber
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- 239000012528 membrane Substances 0.000 title claims abstract description 120
- 239000000919 ceramic Substances 0.000 title claims abstract description 113
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 239000003546 flue gas Substances 0.000 title claims abstract description 59
- 239000013618 particulate matter Substances 0.000 title claims description 17
- 238000003795 desorption Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- 239000002245 particle Substances 0.000 claims abstract description 22
- 239000000779 smoke Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 25
- 238000005192 partition Methods 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 6
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
- 229910052815 sulfur oxide Inorganic materials 0.000 abstract description 2
- 239000000498 cooling water Substances 0.000 description 8
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000001089 thermophoresis Methods 0.000 description 4
- 238000001962 electrophoresis Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 239000010963 304 stainless steel Substances 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 2
- JJWKPURADFRFRB-UHFFFAOYSA-N carbon oxide sulfide Natural products O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/05—Separating dispersed particles from gases, air or vapours by liquid as separating agent by condensation of the separating agent
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a ceramic membrane component for removing flue gas particles, which comprises a bottom water tank, a top water tank, a bottom flange plate, a top flange plate and a plurality of ceramic membrane pipes, wherein the bottom water tank is connected with the top water tank through a pipeline; the bottom water tank is connected with the bottom flange, the top water tank is connected with the top flange, and the ceramic membrane tube penetrates through the bottom flange and the top flange to be respectively communicated with the bottom water tank and the top water tank; a water inlet is arranged below the bottom water tank, and a water outlet is arranged above the top water tank; a leading-out port is arranged on one side of the bottom flange plate far away from the flue gas inlet, and the bottom of the leading-out port is connected with a leading-out pipe; and a circle of fence is also arranged on the bottom flange plate and surrounds the ceramic membrane tube and the lead-out port. The invention can effectively remove the smoke particles, and can keep higher removal efficiency for the particles with the particle size less than 1 micron; meanwhile, because the ceramic membrane is utilized, the ceramic membrane can well remove moisture, carbon dioxide and sulfur oxides in the flue gas, and can work for a long time in a severe flue gas environment.
Description
Technical Field
The invention relates to the technical field of environmental engineering, in particular to a ceramic membrane component for removing smoke particles.
Background
The current commonly used flue gas particulate matter removing device mainly comprises an electrostatic dust collector, a bag-type dust collector, a Venturi dust collector, an ultrasonic dust collector and the like, and the removing efficiency of the traditional particulate matter removing device is lower for particulate matters with the particle size smaller than 1 micron.
In addition, the wet desulphurization technology is a desulphurization technology commonly adopted in domestic thermal power plants at present, the desulphurization mode adopts gypsum slurry as an absorbent, and when sulfur oxides are removed from the flue gas, part of gypsum liquid drops with smaller particle size can be taken out from the desulphurization tower, so that the concentration of particulate matters in the tail flue gas is further increased.
Therefore, how to provide a new flue gas particulate removal device, which can effectively overcome the above problems, is a direction that needs to be intensively studied by those skilled in the art.
Disclosure of Invention
Therefore, the invention aims to provide a ceramic membrane component for removing flue gas particles, which comprises a bottom water tank, a top water tank, a bottom flange plate, a top flange plate and a plurality of ceramic membrane pipes, wherein the bottom water tank is connected with the top water tank;
the bottom water tank consists of a bottom water chamber and a bottom outer edge flange positioned above the bottom water chamber, and the top water tank consists of a top water chamber and a top outer edge flange positioned below the top water chamber; a water inlet is arranged below the bottom water chamber, a water outlet is arranged above the top water chamber, and the water inlet is connected with a water pump; the bottom water tank is connected with the bottom flange plate through the bottom outer edge flange, and the top water tank is connected with the top flange plate through the top outer edge flange; the top surface of the bottom flange plate and the bottom surface of the top flange plate are correspondingly provided with a plurality of trapezoidal holes for penetrating and fixing the ceramic membrane tubes; two ends of the ceramic membrane tube are respectively communicated with a corresponding water outlet pipe on the bottom water chamber and a corresponding water inlet pipe on the top water chamber;
a leading-out port is arranged on one side, far away from the flue gas inlet, of the bottom flange plate, and the bottom of the leading-out port is connected with a leading-out pipe; and a circle of fence for preventing the pollution liquid flowing down along the ceramic membrane pipe from splashing everywhere is also arranged on the bottom flange plate, and the ceramic membrane pipe and the leading-out port are surrounded by the fence.
The invention provides a ceramic membrane component for removing flue gas particles, which can effectively remove the flue gas particles and can also keep higher removal efficiency for particles with the particle size less than 1 micron; meanwhile, because the ceramic membrane is utilized, the invention can well remove moisture, carbon dioxide and oxysulfide in the flue gas and can work for a long time in a severe flue gas environment.
The ceramic membrane component for removing the flue gas particles realizes the application of a heterogeneous condensation technology on a porous membrane material, and flue gas carrying the particles can be condensed on the outer surface of the ceramic membrane tube to form a liquid membrane by utilizing the heterogeneous condensation technology; when the particulate matter meets the liquid film, the particulate matter is finally captured by the liquid film to form a polluted liquid under the synergistic action of thermophoresis effect, inertial collision, diffusion electrophoresis and Brownian diffusion; under the action of gravity, the polluted liquid flows down along the outer surface of the ceramic membrane tube and is finally effectively collected and discharged.
On the basis of the technical scheme, the invention can be improved as follows:
preferably, the ceramic membrane tube further comprises a bearing rod, the length of the bearing rod is equal to that of the ceramic membrane tube, and two ends of the bearing rod are respectively connected with the top surface of the bottom flange plate and the bottom surface of the top flange plate.
The bearing rod is mainly used for bearing the weight of the top flange plate and the top water tank which are positioned above, and the phenomenon that the ceramic membrane pipe is damaged due to overlarge pressure of the top flange plate and the top water tank is avoided.
More preferably, the rod diameter of the bearing rod is equal to the outer diameter of the ceramic membrane tube, and the bearing rod is connected with the top surface of the bottom flange plate and the bottom surface of the top flange plate through bolts.
Preferably, the top surface of the bottom flange plate and the bottom surface of the top flange plate are respectively provided with a circle of sealing channel, and sealing rings are arranged in the sealing channels. The sealing channel and the sealing ring can ensure the connection tightness of the flange plate and the water tank.
More preferably, the sealing channel has a depth of no more than 3 mm and a width of no more than 10 mm.
Preferably, an internal thread is arranged in the trapezoidal hole, and the ceramic membrane tube is extruded and fixed in the trapezoidal hole through a screwed nut.
Preferably, graphite gaskets are sleeved at two ends of the ceramic membrane tube and are positioned between the outer side surface of the ceramic membrane tube and the inner side surface of the trapezoidal hole.
The graphite gaskets can ensure the connection tightness of the ceramic membrane tube and the top flange and the bottom flange, and the graphite gaskets are sleeved at two ends of the ceramic membrane tube during installation; when the ceramic membrane assembly works, the ceramic membrane assembly is positioned in a smoke environment, the environment temperature is high, and the graphite gasket is subjected to thermal expansion, so that a gap between the ceramic membrane tube and the flange plate can be effectively filled, and good sealing performance is kept.
Preferably, two crossed partition plates are respectively arranged in the bottom water chamber and the top water chamber, and a plurality of through holes are formed in the partition plates.
The water chamber is equally divided into four parts by the two crossed partition plates, and each partition plate is provided with a plurality of through holes, so that the cooling water flow field inside the water chamber is uniformly distributed.
More preferably, the separator has a thickness of no more than 10 mm; in order to ensure the strength of the partition plate, the number of the openings on the partition plate is not more than 20.
Preferably, the number and the positions of the openings of each partition plate are mirror-symmetrical about the center of the partition plate.
Preferably, the bottom areas of the bottom water chamber and the top water chamber are larger than or equal to the bottom area of the ceramic membrane tube arrangement area and smaller than the bottom areas of the bottom flange plate and the top flange plate.
Preferably, a plurality of ceramic membrane tubes are arranged in a staggered manner along the flow direction of the flue gas.
Preferably, when the ceramic membrane module is integrally installed in a flue, an installation inclination angle with an inclination angle degree not more than 1 degree is formed along the flow direction of flue gas, the end close to the inlet side of the flue gas is slightly higher, and the end far away from the inlet side of the flue gas is slightly lower, so that the polluted liquid can flow out of the ceramic membrane module through the outlet and the outlet pipe.
Preferably, all parts in the ceramic membrane module, which are contacted with the flue gas, are made of 2205 stainless steel, and the parts which are only contacted with the cooling water are made of 304 stainless steel.
By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that:
(1) the invention can effectively remove the smoke particles and can keep higher removal efficiency for the particles with the particle size less than 1 micron.
(2) The parts of the structure of the ceramic membrane module, which are contacted with the flue gas, are made of 2205 stainless steel and inorganic ceramic, and the two materials are corrosion-resistant materials, so that the ceramic membrane module can work for a long time in a severe flue gas environment.
(3) The ceramic membrane component is sealed by the graphite gasket and the sealing ring, so that the ceramic membrane component can be ensured to keep good sealing performance in high-temperature and high-pressure environments;
(4) the bottom flange plate is provided with the fence, the lead-out opening and the lead-out pipe, so that formed polluted liquid can be effectively collected and discharged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a front view of a ceramic membrane module for removing flue gas particulates according to the present invention.
FIG. 2 is a sectional view taken along line A-A of FIG. 1 according to the present invention.
Figure 3 the attached drawing is a front view of the top tank of the present invention.
Figure 4 the attached drawing is a top view of the top tank of the present invention.
FIG. 5 is a sectional view taken along line A-A of FIG. 4 according to the present invention.
FIG. 6 is a sectional view taken along line B-B of FIG. 4 according to the present invention.
Wherein, in the figure,
1-a bottom water tank, 101-a bottom water chamber, 102-a bottom outer edge flange; 2-a top water tank, 201-a top water chamber, 202-a top outer edge flange, 2021-a connecting hole III; 3-a bottom flange plate, 301-a connecting hole II; 4-a top flange plate; 5-ceramic membrane tube; 6-water inlet; 7-water outlet; 8-a lead-out port; 9-an eduction tube; 10-a fence; 11-a load-bearing bar; 12-a sealing ring; 13-a separator; 14-a through hole; 15-ceramic membrane tube arrangement zone.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example (b):
the ceramic membrane module for removing flue gas particulate matters according to the embodiment of the invention is described in detail below with reference to the attached drawings.
As shown in fig. 1-6, an embodiment of the present invention discloses a ceramic membrane module for removing flue gas particulates, which includes a bottom water tank 1, a top water tank 2, a bottom flange 3, a top flange 4, a bearing rod 11, and a plurality of ceramic membrane tubes 5. Wherein the arrows in figure 2 indicate the flue gas flow direction.
According to the invention, by using a heterogeneous condensation technology, the flue gas carrying particulate matters can be condensed on the outer surfaces of a plurality of ceramic membrane tubes 5 to form a liquid membrane; when the particulate matter meets the liquid film, the particulate matter is finally captured by the liquid film to form a polluted liquid under the synergistic action of thermophoresis effect, inertial collision, diffusion electrophoresis and Brownian diffusion; under the action of gravity, the polluted liquid flows down along the outer surface of the ceramic membrane tube 5. The invention can well remove moisture, carbon dioxide and oxysulfide in the flue gas and can work for a long time in a severe flue gas environment.
In particular, the method comprises the following steps of,
the bottom water tank 1 is composed of a bottom water chamber 101 and a bottom outer edge flange 102 positioned above the bottom water chamber, the top water tank 2 is composed of a top water chamber 201 and a top outer edge flange 202 positioned below the top water chamber, and the bottom water tank 1 and the top water tank 2 are completely identical in structure.
A water inlet 6 is arranged below the bottom water chamber 101, a water outlet 7 is arranged above the top water chamber 201, and the water inlet 6 is connected with a water pump so that cooling water can circulate in the ceramic membrane tube 5. The bottom water tank 1 is connected with a second connecting hole 301 on the bottom flange plate 3 through a first connecting hole on the bottom outer edge flange 102, and the top water tank 2 is connected with a fourth connecting hole on the top flange plate 4 through a third connecting hole 2021 on the top outer edge flange 202.
Correspond on the top surface of bottom ring flange 3 and the bottom surface of top ring flange 4 and offer a plurality of trapezoidal holes that are used for passing and fixed ceramic membrane pipe 5, specifically, be equipped with the internal thread in the trapezoidal hole, ceramic membrane pipe 5 is fixed by the extrusion through the nut of screw in trapezoidal downthehole. Further, in order to guarantee the sealing performance of connecting the ceramic membrane tube 5 with the top flange plate 4 and the bottom flange plate 3, during installation, graphite gaskets are sleeved at two ends of the ceramic membrane tube 5 and are positioned between the outer side surface of the ceramic membrane tube 5 and the inner side surface of the trapezoidal hole, during work, the ceramic membrane assembly is in a smoke environment, the environment temperature is high, the graphite gaskets are thermally expanded, gaps between the ceramic membrane tube 5 and the flange plates can be effectively filled, and good sealing performance is kept.
Two ends of the ceramic membrane tube 5 are respectively communicated with a corresponding water outlet pipe on the bottom water chamber 101 and a corresponding water inlet pipe on the top water chamber 201.
Further, the ceramic membrane tubes 5 are arranged in a staggered manner along the flowing direction of the flue gas.
The ceramic membrane tube 5 in the invention is a porous tubular membrane material; the inner diameter of the membrane tube is within the range of 5-10 mm, the outer diameter of the membrane tube is within the range of 10-15 mm, and cooling water is introduced into the membrane tube, so that a certain temperature difference is formed between the inside and the outside of the membrane tube, and the thermophoresis effect is enhanced; the average pore diameter of the outer surface of the ceramic membrane tube 5 is within the range of 0.1 nanometer to 5 micrometers, the porosity is within the range of 10 percent to 60 percent, a plurality of pores exist on the outer surface of the membrane tube, and the surface structure can strengthen the condensation and heat transfer; the length of the ceramic membrane tube 5 is within the range of 5 cm-3 m, and the practical requirements of projects of different scales can be met.
Further, the bottom areas of the bottom water chamber 101 and the top water chamber 201 are greater than or equal to the bottom area of the ceramic membrane tube arrangement region 15 and smaller than the bottom areas of the bottom flange 3 and the top flange 4, so that an effective water supply function and a connection effect are realized. To further ensure the reliability of the connection, the thickness of the bottom flange 3, the top flange 4, the bottom flange 102 and the top flange 202 is not less than 20 mm.
The bearing rod 11 is mainly used for bearing the weight of the top flange plate 4 and the top water tank 2 which are positioned above, and the phenomenon that the ceramic membrane tube 5 is damaged due to overlarge pressure formed by the top flange plate 4 and the top water tank 2 is avoided. Therefore, the length of the bearing rod 11 is equal to that of the ceramic membrane tube 5, the rod diameter of the bearing rod 11 is equal to the outer diameter of the ceramic membrane tube 5, and two ends of the bearing rod 11 are respectively connected with the top surface of the bottom flange 3 and the bottom surface of the top flange 4 through bolts.
The top surface of the bottom flange plate 3 and the bottom surface of the top flange plate 4 are respectively provided with a circle of sealing channel, the depth of the sealing channel is not more than 3 mm, the width of the sealing channel is not more than 10 mm, and a sealing ring 12 is arranged in the sealing channel and used for ensuring the sealing property of the connection between the flange plate and the water tank.
One side of the bottom flange plate 3 far away from the flue gas inlet is provided with a lead-out opening 8, and the bottom of the lead-out opening 8 is connected with a lead-out pipe 9 for timely discharging the polluted liquid out of the ceramic membrane component. The bottom flange 3 is also provided with a circle of fences 10 for preventing the polluted liquid flowing down along the ceramic membrane tube 5 from splashing everywhere, and the fences 10 surround the ceramic membrane tube 5 and the leading-out opening 8.
The leading-out ports 8 are only arranged on the bottom flange plate 3, the top flange plate 4 is not arranged, the number of the leading-out ports 8 is not less than two, and the leading-out ports 8 are connected with the leading-out pipe 9 through threads. The distance between the outlet 8 and the fence 10 and between the outlet 8 and the ceramic film tube 5 is required to be kept between 5 mm and 10 mm, on the basis, the diameter of the outlet 8 is increased as much as possible, and the diameter of the outlet 8 is not less than 20 mm.
Similarly, the rail 10 is only arranged on the bottom flange 3, the top flange 4 is not arranged, and the rail 10 and the bottom flange 3 are connected by welding. In order to avoid splashing of the polluted liquid flowing down along the ceramic membrane tube 5, the height of the fence 10 is not less than 10 mm; in order not to affect the arrangement of the ceramic membrane tube 5 and the bottom tank 1, the thickness of the enclosure 10 is not more than 10 mm.
In order to further optimize the technical scheme, under the working condition that the flow rate of the flue gas is higher than 15 meters per second or the temperature of the flue gas is higher than 100 ℃, the height of the fence 10 needs to be further increased, so that the pollution liquid is prevented from being carried by the flue gas or being accumulated to overflow the fence 10.
In order to further optimize the above technical solution, two criss-cross partition plates 13 are respectively disposed in the bottom water chamber 101 and the top water chamber 201, and a plurality of through holes 14 are formed in the partition plates 13. The water chamber is divided into four parts by two criss-cross partition plates 13, and each partition plate 13 is provided with a plurality of through holes 14, so that the cooling water flow field inside the water chamber is uniformly distributed. The thickness of the partition plate 13 is not more than 10 mm; in order to ensure the strength of the partition plate 13, the number of the openings in the partition plate 13 is not more than 20, and the number and the positions of the openings in each partition plate 13 are mirror-symmetrical with respect to the center of the partition plate 13.
In order to further optimize the technical scheme, all parts in the ceramic membrane module, which are in contact with the flue gas, need to be made of 2205 stainless steel, such as a bottom flange 3, a top flange 4, a bottom water tank 1, a top water tank 2, a fence 10 and a bearing rod 11; while the parts that only contact the cooling water are made of 304 stainless steel, such as the partition 13.
The ceramic membrane component for removing the smoke particles comprises the following specific working processes:
cooling water flows in from a water inlet 6, sequentially flows through a bottom water tank 1, a ceramic membrane tube 5 and a top water tank 2, and finally flows out from a water outlet 7; the temperature of the cooling water is not higher than 28 ℃, and the temperature of the flue gas is within the range of 40-250 ℃; when the flue gas sweeps across the outer surface of the ceramic membrane tube 5, the flue gas carrying particulate matters can be subjected to heterogeneous condensation on the surface of a non-uniform porous medium, a condensed liquid film generated by condensation is attached to the outer surface of the ceramic membrane tube 5, and the particulate matters are finally captured by the condensed liquid film under the synergistic effect of thermophoresis effect, inertial collision, diffusion electrophoresis and Brownian diffusion, so that the particulate matters in the flue gas are removed.
The polluted liquid generated in the smoke particulate matter removing process flows down along the outer surface of the ceramic membrane tube 5 under the action of gravity; under the action of the fence 10, the polluted liquid cannot splash out of the ceramic membrane tube arrangement area 15; the polluted liquid gathered in the ceramic membrane tube arrangement area 15 flows out of the ceramic membrane module through the outlet 8 and the outlet tube 9.
When the ceramic membrane module is installed in a flue, a tiny installation inclination angle is formed along the flow direction of flue gas, the inclination angle degree does not exceed 1 degree, the ceramic membrane module close to the flue gas inlet side is slightly higher, and the ceramic membrane module far away from the flue gas inlet side is slightly lower; this arrangement facilitates the flow of contaminated liquid out of the ceramic membrane module via the outlet 8 and the outlet tube 9.
The ceramic membrane component for removing the smoke particles is designed based on a heterogeneous condensation technology, the ceramic membrane component can effectively remove the particles in the smoke with the particle size of less than 1 micron, and the material selected by the ceramic membrane component can meet the requirement of long-term operation in practical engineering.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A ceramic membrane component for removing smoke particles is characterized by comprising a bottom water tank (1), a top water tank (2), a bottom flange plate (3), a top flange plate (4) and a plurality of ceramic membrane pipes (5);
the bottom water tank (1) consists of a bottom water chamber (101) and a bottom outer edge flange (102) positioned above the bottom water chamber, and the top water tank (2) consists of a top water chamber (201) and a top outer edge flange (202) positioned below the top water chamber; a water inlet (6) is arranged below the bottom water chamber (101), a water outlet (7) is arranged above the top water chamber (201), and the water inlet (6) is connected with a water pump; the bottom water tank (1) is connected with the bottom flange plate (3) through the bottom outer edge flange (102), and the top water tank (2) is connected with the top flange plate (4) through the top outer edge flange (202); the top surface of the bottom flange plate (3) and the bottom surface of the top flange plate (4) are correspondingly provided with a plurality of trapezoidal holes for penetrating and fixing the ceramic membrane tubes (5); two ends of the ceramic membrane tube (5) are respectively communicated with a corresponding water outlet pipe on the bottom water chamber (101) and a corresponding water inlet pipe on the top water chamber (201);
a leading-out opening (8) is formed in one side, far away from the flue gas inlet, of the bottom flange plate (3), and the bottom of the leading-out opening (8) is connected with a leading-out pipe (9); the bottom flange plate (3) is also provided with a circle of fence (10) for preventing pollution liquid flowing down along the ceramic membrane tube (5) from splashing everywhere, and the fence (10) surrounds the ceramic membrane tube (5) and the leading-out opening (8).
2. The ceramic membrane module for removing the flue gas particulate matter as claimed in claim 1, wherein: the ceramic membrane tube is characterized by further comprising a bearing rod (11), wherein the length of the bearing rod (11) is equal to that of the ceramic membrane tube (5), and two ends of the bearing rod (11) are respectively connected with the top surface of the bottom flange plate (3) and the bottom surface of the top flange plate (4).
3. The ceramic membrane module for removing the flue gas particulate matter as claimed in claim 1, wherein: the top surface of the bottom flange plate (3) and the bottom surface of the top flange plate (4) are respectively provided with a circle of sealing channel, and a sealing ring (12) is arranged in each sealing channel.
4. The ceramic membrane module for removing the flue gas particulate matter as claimed in claim 1, wherein: the ceramic membrane tube is characterized in that internal threads are arranged in the trapezoidal holes, and the ceramic membrane tube (5) is extruded and fixed in the trapezoidal holes through screwed nuts.
5. The ceramic membrane module for removing the flue gas particulate matter according to claim 1 or 4, characterized in that: the graphite gasket is sleeved at two ends of the ceramic membrane tube (5) and located between the outer side face of the ceramic membrane tube (5) and the inner side face of the trapezoidal hole.
6. The ceramic membrane module for removing the flue gas particulate matter as claimed in claim 1, wherein: two crossed partition plates (13) are respectively arranged in the bottom water chamber (101) and the top water chamber (201), and a plurality of through holes (14) are formed in the partition plates (13).
7. The ceramic membrane module for removing the flue gas particulate matter of claim 6, wherein: the number and the positions of the holes of each partition plate (13) are mirror-symmetrical about the center of the partition plate (13).
8. The ceramic membrane module for removing the flue gas particulate matter as claimed in claim 1, wherein: the bottom water chamber (101) and the top water chamber (201) are larger than or equal to the bottom area of the ceramic membrane tube arrangement region (15) and smaller than the bottom areas of the bottom flange (3) and the top flange (4).
9. The ceramic membrane module for removing the flue gas particulate matter as claimed in claim 1, wherein: the ceramic membrane tubes (5) are arranged in a staggered manner along the flow direction of flue gas.
10. The ceramic membrane module for removing flue gas particulates according to any one of claims 1 to 4 and 6 to 9, wherein: when the ceramic membrane module is integrally installed in a flue, an installation inclination angle with the inclination angle degree not more than 1 degree needs to be formed along the flow direction of flue gas, one end close to the inlet side of the flue gas is slightly higher, and the other end far away from the inlet side of the flue gas is slightly lower.
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| CN112902699A (en) * | 2021-03-26 | 2021-06-04 | 华北电力大学 | Cooling tower water vapor recovery system of thermal power plant |
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