CN216726218U - Electric bag dust collector capable of recycling flue gas moisture - Google Patents
Electric bag dust collector capable of recycling flue gas moisture Download PDFInfo
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- CN216726218U CN216726218U CN202122811662.5U CN202122811662U CN216726218U CN 216726218 U CN216726218 U CN 216726218U CN 202122811662 U CN202122811662 U CN 202122811662U CN 216726218 U CN216726218 U CN 216726218U
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- flue gas
- ceramic membrane
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- filter bag
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- 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
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The utility model discloses an electric bag dust collector capable of recycling flue gas moisture, which comprises an electric bag dust collector main body and a moisture recycling device, wherein the electric bag dust collector main body comprises a bell mouth, a dust collecting chamber, a shell, a gas purifying chamber, a filter bag, an electrode, an electrostatic generator, a gas purifying outlet and a gas purifying chamber; the bell mouth, the dust collecting chamber are connected with the shell, the upper part of the filter bag is the air purifying chamber, the tail end of the filter bag is a purified air outlet, the electrode and the composite ceramic membrane tube are separated by the porous insulating plate, two ends of the composite ceramic membrane tube are respectively connected with the connector, and the cooling water inlet device and the water return device are respectively controlled by the controller and the adapter. The utility model can not only recover the moisture in the smoke, but also protect the filter bag and reduce the resistance.
Description
Technical Field
The utility model relates to the field of flue gas dehydration and dust removal of a thermal power plant, in particular to an electric bag dust remover capable of recovering flue gas moisture.
Background
The flue gas of the thermal power plant inevitably contains dust and vapor, and in order to reduce the dust emission, the dust in the flue gas at the tail part of the boiler is removed by a common electric bag dust remover. However, the coal contains a large amount of moisture, and the soot blower also blows a large amount of water vapor, so the flue gas generated by the boiler contains a large amount of moisture, when the flue gas flows through the electric bag dust collector, because the flue gas temperature is reduced more because the flue gas is far away from the outlet of the boiler, when the flue gas continuously flows to the filter bag in the electric bag dust collector, along with the continuous reduction of the flue gas temperature, the flue gas temperature around the filter bag is often reduced to be below an acid dew point, so that the filter bag is often corroded by acid, meanwhile, the condensed water drops are easily attached to the surface of the fiber forming the filter bag after being mixed with fine dust particles, and the dust drops are difficult to be cleaned by the soot blower, so that the pasted bag and the filter bag are finally hardened.
The inside filter bag of electricity bag dust remover is corroded the back by acid, will make the filter bag damaged to lead to dust collection efficiency to descend, seriously endanger ecological environment and people's life health, the filter bag is blockked up by moist dust simultaneously and is caused the stick with paste the bag and harden the back, will make dust remover overall resistance rise, causes the draught fan power consumption to increase, and boiler unit overall efficiency descends.
In order to reduce the water content in the flue gas, the composite ceramic membrane tube can be used for recovering the water content. The principle is mainly as follows: the composite ceramic membrane tube is hollow inside, the outside has selectivity to gas and water vapor, after circulating cooling water is added in the composite ceramic membrane tube, when smoke flows through the surface of the composite ceramic membrane tube, because the temperature of the cooling water in the composite ceramic membrane tube is lower than that of the smoke, the water vapor in the smoke enters the wall surface of the ceramic membrane tube to undergo capillary condensation and is condensed into water, and under the action of pressure difference, the condensed water in the composite ceramic membrane tube can enter the tube and is taken away by the cooling water and recovered. Therefore, the composite ceramic membrane tube can be used for recovering moisture of the flue gas in the electrostatic fabric filter, and water resources can be saved on the basis of protecting the filter bag and reducing resistance.
Disclosure of Invention
The utility model aims to solve the technical problem of how to overcome the problem that a filter bag in an electric bag dust collector is blocked due to overhigh humidity and high dust concentration of the operating environment.
In order to solve the problems, the utility model provides an electric bag dust collector capable of recovering the moisture of flue gas. The composite ceramic membrane tube is added in the middle of a traditional electric bag dust collector, dust-containing smoke is subjected to primary dust removal after passing through an electric dust removal area, and then moisture in the smoke is recovered by the composite ceramic membrane tube.
The electric bag dust collector capable of recovering the moisture in the flue gas adopts the following technical scheme: the electric bag dust collector comprises an electric bag dust collector main body and a water return device. The electric bag dust collector main body comprises a bell mouth, a dust collecting hopper, a shell, an air purifying chamber, a filter bag, an electrostatic generator, an air purifying chamber, an air purifying outlet and an electrode. The bell mouth is used for flue gas to flow in; the dust collecting hopper is arranged at the lower parts of the electrode and the filter bag and is connected with the shell; the upper part of the flower plate is provided with the air purifying chamber; the tail end of the air purifying chamber is provided with the air purifying outlet. The water return device comprises a composite ceramic membrane pipe, a porous insulating plate, a cooling water inlet device, a water return device, a connector, a controller and a tuner. The composite ceramic membrane tube and the electrode are separated by the porous insulating plate; the two ends of the composite ceramic membrane tube are respectively connected with the connectors; the connector can support the composite ceramic membrane tube and is connected to the cooling water inlet device and the water return device; the cooling water inlet device is controlled by the controller; the water return device is controlled by the dispenser.
Preferably, the water return device can remove dust, recover moisture and protect the filter bag. The main part of the water return device is a composite ceramic membrane tube which is divided into three layers, namely a selection layer, a transition layer and a support layer from outside to inside.
Preferably, the porous insulating plate separates the composite ceramic membrane tube from the electrode, so that the electrode discharge influence on the normal operation of the water return device is reduced, meanwhile, the porous insulating plate replaces a guide plate to a certain extent, the uniform distribution effect of the flue gas is achieved, and the local resistance loss is reduced.
Preferably, the openings on the porous insulating plate are arranged in a quincunx shape, and the porous insulating plate is made of high-temperature-resistant, high-pressure-resistant and corrosion-resistant materials.
Preferably, the composite ceramic membrane tube is arranged in the shell, the porous insulating plate is connected with the composite ceramic membrane tube, the composite ceramic membrane tube is horizontally arranged, the composite ceramic membrane tube is arranged in a row in the horizontal direction, and two ends of the composite ceramic membrane tube are respectively connected with the cooling water inlet device and the water return device.
Preferably, the cooling water inlet device is controlled by the controller, and the controller can regulate and control the water supply quantity of the cooling water inlet device, so that the cooling water in the composite ceramic membrane tube can be continuously adjusted along with the change of the flow of the flue gas, and the moisture recovery efficiency is kept at a higher level all the time.
Preferably, the water return device is controlled by the regulator, so that the water level in the water return device is kept at a preset value.
Technical effects
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the electric dust removal area in the electric bag dust remover is separated from the bag dust removal area, and the composite ceramic membrane tube capable of efficiently recovering moisture is arranged in the separation area, so that after the flue gas is purified in the electric dust removal area to a certain extent, the moisture contained in the flue gas flowing through the electric bag dust remover is efficiently recovered under the condition of meeting the basic working condition of the composite ceramic membrane tube, and further the water content and the acid dew point in the flue gas are reduced, thereby reducing the phenomena of bag pasting, bag hardening and the like caused by acid corrosion of a filter bag in the bag dust removal area and blockage of the filter bag by moist dust. The method provided by the utility model prolongs the service life of the filter bag, reduces the integral resistance of the electric bag dust collector and improves the integral efficiency of the unit. And due to the installation of the porous insulating plate, on the basis of separating the protective electrode and the composite ceramic membrane tube, the smoke distribution on two sides of the porous insulating plate is optimized, and the local resistance loss is reduced.
Drawings
The utility model is further described with reference to the following figures and examples.
Fig. 1 is a schematic vertical mid-section of the present invention.
Fig. 2 is a schematic view of a horizontal mid-section of the present invention.
Fig. 3 is a schematic view of the porous insulating plate of the present invention.
FIG. 4 is a cross-sectional view of a single composite ceramic membrane tube according to the present invention
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following describes the technical solutions of the embodiments of the present invention clearly and completely with reference to the drawings of the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by a person skilled in the art based on the embodiments in the patent of the utility model without any inventive step are within the scope of the patent protection of the utility model.
Example 1
Referring to fig. 1 to 4, in the embodiment of the present invention, an electric bag dust collector capable of recovering flue gas moisture includes a housing 4 and a water returning device 13, a bell mouth 1 is installed on a side surface of the housing 4, an electric dust removal stage 2 and a filter bag 5 are installed inside the housing 4, a dust collection chamber 3 connected to the housing 4 is installed below the electrode 2 and the filter bag 5, an electrostatic generator 10 is connected to an upper end of the electrode 2, a porous insulating plate 9 is installed behind the electrode 2, an opening 11 is arranged on the porous insulating plate 9, a composite ceramic membrane tube 8 is arranged behind the porous insulating plate 9, the filter bag 5 is arranged behind the composite ceramic membrane tube 8, the composite ceramic membrane tube 8 is arranged inside the housing 4 and is divided into three layers, namely, an inner supporting layer 17, a middle transition layer 18 and an outer selection layer 19, two ends of the composite ceramic membrane tube 8 are fixed by connectors 12, and the water returning device 13 controlled by a distributor 14 and a cooling water inlet device 16 controlled by a controller 15 are connected by a supporting layer 17 The connector 12 is communicated with the composite ceramic membrane tube 8, the rear part of the composite ceramic membrane tube 8 is provided with a filter bag 5, the upper part of the filter bag 5 is provided with the air purifying chamber 7, and the rear part of the air purifying chamber 7 is provided with the purified gas outlet 6.
The working principle of the utility model patent is as follows: flue gas flows into the interior of the shell 4 through the bell mouth 1 and is firstly contacted with the electrode 2, the electrode 2 generates static electricity by virtue of the static generator 10, adjacent electrodes in the electrode 2 are provided with charges with opposite polarities, after the flue gas passes through the electrode 2, large-particle dust is ionized and carries certain charges, and then the large-particle dust is adsorbed by the electrodes with opposite polarities, so that the effect of removing the large-particle dust is achieved, and finally the adsorbed large-particle dust is accumulated to the extent that the electrostatic force cannot be continuously accumulated, and then the large-particle dust falls into the dust collection chamber 3 at the lower part.
The residual flue gas containing tiny dust and more moisture continues to flow, in order to prevent the electrode 2 from discharging to influence the rear part to recover the moisture, a porous insulating plate 9 which is high temperature resistant, high pressure resistant and corrosion resistant is arranged at the rear part of the electrode 2, a circular opening 11 is arranged on the porous insulating plate, and the function of uniformly distributing the flue gas can be achieved on the basis of preventing the electrode 2 from discharging to influence the moisture recovery. The flue gas passes through the porous insulation board 9 and reaches the composite ceramic membrane tube 8, the composite ceramic membrane tube 8 is arranged in a row in the direction perpendicular to the horizontal direction, the flue gas can be fully contacted with the composite ceramic membrane tube 8, the outer side of the composite ceramic membrane tube is provided with the selective layer 19, moisture contained in the flue gas is condensed to the selective layer 19 at the outer side and then permeates to the transition layer 18 until the moisture enters the composite ceramic membrane tube 8 through the supporting layer 17 and is taken away by cooling water, and the driving force of the process comprises capillary force and negative pressure caused by continuous flowing of the cooling water provided by the water return device 13.
The dehydrated flue gas finally flows into a filter bag 5 inside the shell 4, and the clean flue gas after removing the tiny dust passes through a gas purifying chamber 7 and flows out from a gas purifying outlet 6.
In the dedusting and dewatering processes, the cooling water inlet device 16 controlled by the controller 15 provides cooling water inside the composite ceramic membrane tube 8, and when the load of the boiler changes, the amount of the cooling water is only maintained at the maximum fixed value and is not changed, so that the highest moisture recovery efficiency can be achieved at any time. The recovered water flows into the water returning device 13 controlled by the regulator 14 along with the cooling water, and after only enough cooling water is reserved, the redundant water can be reused.
Example 2
Referring to fig. 1 to 4, in the embodiment of the present invention, an electric bag dust collector capable of recovering flue gas moisture includes a housing 4 and a water returning device 13, a bell mouth 1 is installed on a side surface of the housing 4, an electric dust removal stage 2 and a filter bag 5 are installed inside the housing 4, a dust collection chamber 3 connected to the housing 4 is installed below the electrode 2 and the filter bag 5, an electrostatic generator 10 is connected to an upper end of the electrode 2, a porous insulation plate 9 is installed behind the electrode 2, an opening 11 is arranged on the porous insulation plate 9, a composite ceramic membrane tube 8 is arranged behind the porous insulation plate 9, the porous insulation plate 9 is arranged in front of the filter bag 5, the composite ceramic membrane tube 8 is arranged inside the housing 4 and is divided into three layers, namely, an inner supporting layer 17, a middle transition layer 18 and an outer selection layer 19, two ends of the composite ceramic membrane tube 8 are fixed by connectors 12, and the composite ceramic membrane tube 8 is connected with the distributor 14 and the control distributor 12 by the connectors 12 The device 15 is communicated, the regulator 14 is matched with the controller 15 to jointly control the water return device 13 and the cooling water inlet device 16, the filter bag 5 is arranged at the rear part of the composite ceramic membrane tube 8, the air purifying chamber 7 is arranged at the upper part of the filter bag 5, and the purified air outlet 6 is arranged at the rear part of the air purifying chamber 7.
The working principle of the utility model patent is as follows: flue gas flows into the interior of the shell 4 through the bell mouth 1 and is firstly contacted with the electrode 2, the electrode 2 generates static electricity by virtue of the static generator 10, adjacent electrodes in the electrode 2 are provided with charges with opposite polarities, after the flue gas passes through the electrode 2, large-particle dust is ionized and carries certain charges, and then the large-particle dust is adsorbed by the electrodes with opposite polarities, so that the effect of removing the large-particle dust is achieved, and finally the adsorbed large-particle dust is accumulated to the extent that the electrostatic force cannot be continuously accumulated, and then the large-particle dust falls into the dust collection chamber 3 at the lower part.
The residual flue gas containing tiny dust and more moisture continues to flow, in order to prevent the electrode 2 from discharging to influence the rear part to recover the moisture, a porous insulating plate 9 which is high temperature resistant, high pressure resistant and corrosion resistant is arranged at the rear part of the electrode 2, a circular opening 11 is arranged on the porous insulating plate, and the function of uniformly distributing the flue gas can be achieved on the basis of preventing the electrode 2 from discharging to influence the moisture recovery. The flue gas passes through the porous insulation board 9, reaches the composite ceramic membrane pipe 8, the composite ceramic membrane pipe 8 is arranged in a row of inserting in the direction perpendicular to the level, guarantee that the flue gas can fully contact the composite ceramic membrane pipe 8, the outside is the optional layer 19, moisture in the flue gas condenses to the outside optional layer 19 after, permeate to the transition layer 18, until entering the composite ceramic membrane pipe 8 through the supporting layer 17 inside and being taken away by the cooling water, the driving force of this process includes capillary force and the negative pressure that the continuous flow of cooling water that the backwater device 13 provided brought.
The dehydrated flue gas finally flows into a filter bag 5 inside the shell 4, and the clean flue gas after removing the tiny dust passes through a gas purifying chamber 7 and flows out from a gas purifying outlet 6.
In the whole dedusting and dewatering process, the cooling water inlet device 16 controlled by the controller 15 provides cooling water inside the composite ceramic membrane tube 8, and the amount of the cooling water is constantly changed along with the change of the load of the boiler, so that the minimum energy consumption can be ensured while the moisture is recovered.
While the embodiments of this invention have been illustrated and described in detail by the applicant with reference to the drawings attached hereto, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, and that the utility model can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (5)
1. The utility model provides an electric bag dust remover of recoverable flue gas moisture, including horn mouth (1), electrode (2), dust collecting chamber (3), casing (4), filter bag (5), net gas export (6), air-purifying chamber (7), composite ceramic membrane pipe (8), porous insulation board (9), electrostatic generator (10), trompil (11), connector (12), return water device (13), tuner (14), controller (15), cooling water installations (16), supporting layer (17), transition layer (18), selective layer (19), its characterized in that: the horn mouth (1) is used for flue gas to flow in, dust collecting chamber (3) are arranged in electrode (2) with filter bag (5) lower part, and with casing (4) link to each other, filter bag (5) upper portion is air-purifying chamber (7), air-purifying chamber (7) end is clean gas export (6), electrode (2) with compound ceramic membrane pipe (8) quilt porous insulation board (9) are separated, compound ceramic membrane pipe (8) both ends are connected respectively connector (12), connector (12) can support compound ceramic membrane pipe (8) and be connected to cooling water inlet device (16) with return water device (13), cooling water inlet device (16) are connected controller (15), return water device (13) are connected adapter (14).
2. The electric bag dust collector capable of recycling flue gas moisture as claimed in claim 1, wherein the composite ceramic membrane tube (8) is placed inside the shell (4) and behind the porous insulating plate (9) and in front of the filter bag (5).
3. The electric bag dust collector capable of recovering flue gas moisture as claimed in claim 1, wherein the porous insulating plate (9) is provided with the openings (11) so as to play a role of uniformly distributing flue gas on the basis of preventing the discharge of the electrode (2) from influencing moisture recovery.
4. The electric bag dust collector capable of recovering flue gas moisture as claimed in claim 1, wherein the composite ceramic membrane tube (8) is composed of three layers, respectively: the outer selection layer (19), the middle transition layer (18), and the inner support layer (17).
5. The electric bag dust collector capable of recovering flue gas moisture as claimed in claim 1, wherein cooling water inside the composite ceramic membrane tube (8) is provided by the cooling water inlet device (16), and recovered moisture is collected by the water return device (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122811662.5U CN216726218U (en) | 2021-11-17 | 2021-11-17 | Electric bag dust collector capable of recycling flue gas moisture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122811662.5U CN216726218U (en) | 2021-11-17 | 2021-11-17 | Electric bag dust collector capable of recycling flue gas moisture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216726218U true CN216726218U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122811662.5U Active CN216726218U (en) | 2021-11-17 | 2021-11-17 | Electric bag dust collector capable of recycling flue gas moisture |
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| Country | Link |
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| CN (1) | CN216726218U (en) |
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2021
- 2021-11-17 CN CN202122811662.5U patent/CN216726218U/en active Active
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