CN219291044U - Circulating film type flue gas desulfurization tower - Google Patents
Circulating film type flue gas desulfurization tower Download PDFInfo
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- CN219291044U CN219291044U CN202320179012.XU CN202320179012U CN219291044U CN 219291044 U CN219291044 U CN 219291044U CN 202320179012 U CN202320179012 U CN 202320179012U CN 219291044 U CN219291044 U CN 219291044U
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- flue gas
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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
Abstract
The utility model relates to the technical field of catalytic cracking tail gas treatment, in particular to a circulating film type flue gas desulfurization tower which comprises a tower body and a film circulating part and is characterized in that the tower body is of a vertical hollow tower structure and is divided into an immersed cavity, a desulfurization cavity and a dehumidification cavity from bottom to top, the immersed cavity is communicated with a scrubbing liquid inlet pipe and a scrubbing liquid outlet pipe, circulating water is filled in the immersed cavity, a flue gas inlet is communicated with the lower part of the desulfurization cavity, the top of the dehumidification cavity is communicated with a flue gas outlet, the film circulating part comprises an attached film, a driving wheel, driven wheels and a separation strip, the attached film and a plurality of driven wheels on the left side form a multilayer Z-shaped desulfurization structure and divide the desulfurization cavity into a plurality of desulfurization partitions, and the driving wheel on the right lower part of the immersed cavity is immersed in the circulating water and drives the attached film to circularly move.
Description
Technical Field
The utility model relates to the technical field of catalytic cracking tail gas treatment, in particular to a circulating film type flue gas desulfurization tower.
Background
The catalytic cracking device plays a role in the oil refining industry, the energy production ratio is large, the flue gas regenerated by the catalyst is a main pollution source of the device and a refinery, the catalytic raw material contains sulfur, nitrogen and other harmful substances (the mass fraction of sulfur is generally 0.2% -0.7%), and the proportion of sulfur entering the flue gas is increased along with the improvement of the blending proportion of residual oil. The sulfur-containing flue gas treatment has a plurality of modes, the membrane treatment is a novel mode, alkali liquor is attached to the membrane, sulfur-containing flue gas can react with the alkali liquor when passing through the membrane, sulfate is generated, and the sulfate is deposited and attached to the membrane, so that sulfur components in the flue gas are removed.
The patent with the application number of CN201320423959.7 discloses a resource recovery type membrane method flue gas simultaneous desulfurization and denitrification device, wherein a gas phase inlet of a hydrophobic hollow fiber membrane absorber is connected with a booster fan, and flue gas enters a shell side of the hydrophobic hollow fiber membrane absorber through the booster fan; the gas phase outlet of the hydrophobic hollow fiber membrane absorber is connected to a chimney, the device further comprises a middle box, an absorbent replenishing device, a first water pump and a neutralization device, the absorbent replenishing device is connected with the middle box, the middle box is connected with the liquid phase inlet of the hydrophobic hollow fiber membrane absorber through a circulating pump, the absorbent enters the middle box through the absorbent replenishing device and then enters the tube pass of the hydrophobic hollow fiber membrane absorber through the circulating pump, the liquid phase outlet of the hydrophobic hollow fiber membrane absorber is connected to the middle box, the middle box is connected with the neutralization device through the first water pump, and the outlet of the neutralization device is sequentially connected to a second water pump, a crystallizer, a dehydrator and a dryer; the neutralization device is connected with an alkali liquor tank. However, the fiber membrane of the device needs to be maintained after sulfur-containing flue gas is blown in for a long time, and flue gas desulfurization cannot be performed during maintenance, so that the working efficiency is reduced, and meanwhile, the operation cost is also improved due to frequent maintenance.
Disclosure of Invention
The utility model aims to solve the problems of complex replacement of an adsorption film, high cost and high time cost of replacement of the adsorption film in the prior art, and provides a circulating film type flue gas desulfurization tower.
The technical scheme of the utility model is as follows:
compared with the prior art, the utility model has the following advantages:
the utility model provides a circulating film formula flue gas desulfurization tower, includes tower body and membrane circulation portion, the tower body is vertical cavity tower structure and from the bottom up divide into immersion chamber, desulfurization chamber and dehumidification chamber, immersion chamber with washout liquid inlet tube and washout liquid outlet tube intercommunication and inside are full of circulating water, the flue gas entry with the lower part intercommunication of desulfurization chamber, the top and the flue gas outlet intercommunication of dehumidification chamber, membrane circulation portion includes adhesion membrane, action wheel, follow driving wheel and dividing strip, adhesion membrane and left a plurality of follow driving wheels constitute multilayer "Z" font desulfurization structure and will the desulfurization chamber is divided into a plurality of desulfurization and cuts off, the action wheel of immersion chamber right side lower part submerges in circulating water and drives adhesion membrane circulation motion, adhesion membrane with the action wheel tensioning in desulfurization chamber upper right side is connected, the division board set up in desulfurization chamber's right side and bottom submergence in circulating water, be provided with a plurality of shower nozzles on the division board and to adhesion membrane is followed driving wheel and is formed the sealing structure of adhesion membrane contact department with the corresponding follow driving wheel.
Preferably, the alkali solution attached to the attaching film is sodium hydroxide solution, and the water injected into the immersion cavity by the washing liquid inlet pipe is circulating water without sodium sulfate and sodium sulfite.
Preferably, the side wall of the tower body is provided with a limiting sealing strip, and the side edge of the attaching film is in clamping sliding connection with the limiting sealing strip.
Preferably, the side of adhesion membrane is provided with "protruding" font outwards bellied protruding card strip, limit seal strip includes two bar structures about and be provided with inwards bellied protruding card strip in the outside, protruding card strip and protruding card strip screens sliding connection.
Preferably, a cooling pipe is arranged in the dehumidification cavity, and the temperature in the dehumidification cavity is lower than 0 ℃.
Preferably, ceramic bearings are arranged on two sides of the driving wheel, and the adhesion membrane is made of corrosion-resistant porous elastic materials.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of the connection of an attachment membrane and a limit seal;
in the figure: the device comprises a 1-tower body, a 11-immersed cavity, a 12-desulfurization cavity, a 13-dehumidification cavity, a 14-flue gas inlet, a 15-scrubbing liquid inlet pipe, a 16-scrubbing liquid outlet pipe, a 17-flue gas outlet, a 18-partition plate and a 19-alkali liquor spray head;
2-film circulation part, 21-attached film, 211-convex clamping strip, 22-driving wheel, 23-driven wheel, 24-limit sealing strip, 241-convex clamping strip and 25-separation strip;
3-cooling tube.
Detailed Description
Various embodiments of the utility model are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.
Example 1
Referring to fig. 1, compared with a common mode desulfurizing tower, the circulating membrane type flue gas desulfurizing tower adopts circulating membrane type adsorption desulfurization, so that the problem that a large amount of water is doped in wet desulfurization is avoided, and the adhesive membrane 21 can be recycled, the maintenance frequency is reduced, and the working efficiency is improved. The tower body 1 is of a vertical hollow tower type structure and is divided into an immersion cavity 11, a desulfurization cavity 12 and a dehumidification cavity 13 from bottom to top, the immersion cavity 11 is communicated with a scrubbing liquid inlet pipe 15 and a scrubbing liquid outlet pipe 16, circulating water is filled in the immersion cavity, a flue gas inlet 14 is communicated with the lower part of the desulfurization cavity 12, the top of the dehumidification cavity 13 is communicated with a flue gas outlet 17, the membrane circulation part 2 comprises an attachment membrane 21, a driving wheel 22, driven wheels 23 and separation strips 25, the attachment membrane 21 and a plurality of driven wheels 23 on the left side form a multi-layer Z-shaped desulfurization structure and divide the desulfurization cavity 12 into a plurality of desulfurization partitions, the driving wheel 22 on the right lower part of the immersion cavity 11 is immersed in circulating water and drives the attachment membrane 21 to circularly move, the attachment membrane 21 is in tension connection with the driving wheel 22 on the right upper part of the desulfurization cavity 12, a separation plate 18 is arranged on the right side of the desulfurization cavity 12 and the bottom is immersed in the circulating water, a plurality of alkaline liquid spray heads 19 are arranged on the separation plate 18 and spray the attachment membrane 21, and the plurality of strips 25 are in contact with the attachment membrane 21 at the corresponding driven wheels 23 to form an attachment membrane 21.
The alkali solution attached to the attaching film 21 is sodium hydroxide solution, and the water injected into the immersion chamber 11 through the scrubbing liquid inlet pipe 15 is circulating water free of sodium sulfate and sodium sulfite.
Working principle:
flue gas desulfurization mainly relies on the reaction of alkali liquor with sulfur dioxide and sulfur trioxide in flue gas, so that flue gas is desulfurized, and sulfur components in the flue gas are removed from the flue gas due to the formation of water-soluble or water-insoluble salts. The device adopts the sodium method to remove sulfur components mainly because sodium sulfate and sodium sulfite are dissolved in water and can be taken away by circulating water, and sediment is not formed so as to block the device.
1. The operator injects the circulating water without sodium sulfate and sodium sulfite into the immersion cavity 11, and as salt can be spontaneously dissolved in the circulating water with low concentration, the sodium sulfate and sodium sulfite on the attached film 21 can be ensured to smoothly enter the circulating water and be taken away after the reaction, and the operator starts the alkali liquor spray head 19 and sprays sodium hydroxide solution to the attached film 21, so that the attached film 21 is ensured to be attached with sodium hydroxide.
2. The flue gas is blown in from the flue gas inlet 14, then contacts with the adhesion film 21 and reacts with sodium hydroxide on the adhesion film to generate sodium sulfate and sodium sulfite, and the unreacted flue gas is discharged from the flue gas outlet 17 after dehumidification treatment from the dehumidification cavity 13.
3. The sodium sulfate and sodium sulfite generated by the reaction on the adhesion film 21 are dissolved in the circulating water, the circulating water washes and cleans the adhesion film 21, the adhesion film 21 is driven by the driving wheel 22 to continuously circulate upwards, the circulating water in which the sodium sulfate and sodium sulfite are dissolved is discharged from the washing liquid outlet pipe 16, and the sodium sulfate and sodium sulfite form crystals after the water is evaporated by an external processing device.
4. The attached film 21 moves upwards after the immersed cavity 11 is washed and is sprayed with sodium hydroxide by the alkali liquor spray head 19, and the attached film 21 circularly moves back to the left side under the drive of the driving wheel 22 at the highest position to continuously adsorb sulfur components in the flue gas.
The device can fully react with sulfur components in smoke to filter out the sulfur components by arranging a plurality of driven wheels 23 to form a multi-layer Z-shaped filtering structure, and simultaneously submerges the attaching film 21 in circulating water by the driving wheel 22 arranged at the bottom to wash the attaching film 21, and then the attaching film 21 can be recycled by spraying the attaching film 21 again by the alkali liquor spray head 19, so that the working efficiency of the device is improved, and the maintenance time cost and the material cost of the device are reduced.
Example two
Referring to fig. 1 and 2, basically the same as the first embodiment, except that a limit sealing strip 24 is provided on a side wall of the tower body 1, and a side edge of the attaching film 21 is slidably connected with the limit sealing strip 24 in a clamping manner, and the limit sealing strip 24 is provided to continuously tighten the attaching film 21, so that the side edge of the attaching film 21 is prevented from shrinking, and the adsorption effect and the sealing effect are affected, so that smoke is emitted from the side edge of the attaching film 21.
The side of the attaching film 21 is provided with a convex clamping strip 211 protruding outwards in a convex shape, the limit sealing strip 24 comprises an upper strip-shaped structure and a lower strip-shaped structure, an inwards protruding clamping strip 241 is arranged on the outer side, and the convex clamping strip 211 is in clamping sliding connection with the protruding clamping strip 241.
Example III
Referring to fig. 1 and 2, basically the same as the second embodiment is different in that the cooling pipe 3 is provided in the dehumidifying chamber 13, and the temperature in the dehumidifying chamber 13 is lower than 0 ℃. The device removes the moisture in the flue gas in a dry and cold mode, and the water can be frozen at the temperature of 0 ℃, so that the water can be removed from the flue gas, the purity of the flue gas is ensured, and the moisture in the device can not be mixed.
Ceramic bearings are arranged on two sides of the driving wheel 22, corrosion in the running process is avoided, the attaching film 21 is made of a corrosion-resistant porous elastic material, stability of the attaching film 21 in the running process can be guaranteed, corrosion is avoided, and enough sodium hydroxide can be adsorbed.
The present utility model is not limited to the above-described embodiments, and various changes may be made without departing from the spirit of the present utility model within the knowledge of those skilled in the art, and the contents after the changes still fall within the scope of the present utility model.
Claims (6)
1. The utility model provides a circulating film formula flue gas desulfurization tower, includes tower body and membrane circulation portion, its characterized in that, the tower body is vertical cavity tower structure and from bottom to top divide into immersion chamber, desulfurization chamber and dehumidification chamber, immersion chamber with wash liquid inlet tube and wash liquid outlet tube intercommunication and inside are full of circulating water, the flue gas entry with the lower part intercommunication of desulfurization chamber, the top and the flue gas outlet intercommunication of dehumidification chamber, membrane circulation portion includes attachment membrane, action wheel, follow driving wheel and parting bead, attachment membrane and left a plurality of follow driving wheels constitute multilayer "Z" font desulfurization structure and will the desulfurization chamber is divided into a plurality of desulfurization cuts off, the action wheel of immersion chamber right side lower part submerges in circulating water and drives attachment membrane circulation motion, attachment membrane with the action wheel tensioning in desulfurization chamber upper right side is connected, the parting bead set up in the right side of desulfurization chamber and bottom submerges in circulating water, be provided with a plurality of shower nozzles on the parting bead and to attachment membrane and a plurality of follow driving wheels form the contact seal structure with the attachment membrane of parting bead.
2. A circulating film flue gas desulfurization tower according to claim 1, characterized in that: the alkali liquor attached to the attaching film is sodium hydroxide solution.
3. A circulating film flue gas desulfurization tower according to claim 2, characterized in that: the side wall of the tower body is provided with a limit sealing strip, and the side edge of the attaching film is in clamping sliding connection with the limit sealing strip.
4. A circulating film flue gas desulfurization tower according to claim 3, characterized in that: the side of adhesion membrane is provided with "protruding" font outwards bellied protruding card strip, limit seal strip includes two bar structures about and be provided with inwards bellied protruding card strip in the outside, protruding card strip and protruding card strip screens sliding connection.
5. A circulating film flue gas desulfurization tower according to claim 1, characterized in that: and a cooling pipe is arranged in the dehumidifying cavity.
6. A circulating film flue gas desulfurization tower according to claim 1, characterized in that: ceramic bearings are arranged on two sides of the driving wheel, and the adhesion film is made of corrosion-resistant porous elastic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320179012.XU CN219291044U (en) | 2023-02-10 | 2023-02-10 | Circulating film type flue gas desulfurization tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320179012.XU CN219291044U (en) | 2023-02-10 | 2023-02-10 | Circulating film type flue gas desulfurization tower |
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| CN219291044U true CN219291044U (en) | 2023-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320179012.XU Active CN219291044U (en) | 2023-02-10 | 2023-02-10 | Circulating film type flue gas desulfurization tower |
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| CN (1) | CN219291044U (en) |
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2023
- 2023-02-10 CN CN202320179012.XU patent/CN219291044U/en active Active
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