CN113477037A - Ridge type demister capable of recycling flushing water, demisting system and wet desulphurization system - Google Patents
Ridge type demister capable of recycling flushing water, demisting system and wet desulphurization system Download PDFInfo
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- CN113477037A CN113477037A CN202110961960.4A CN202110961960A CN113477037A CN 113477037 A CN113477037 A CN 113477037A CN 202110961960 A CN202110961960 A CN 202110961960A CN 113477037 A CN113477037 A CN 113477037A
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- water
- demister
- ridge
- washing water
- mist eliminator
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- 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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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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
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
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- Treating Waste Gases (AREA)
Abstract
The invention discloses a ridge type demister capable of recycling flushing water, a demisting system and a wet desulphurization system. The invention utilizes the inclined arrangement characteristic of the ridge type demister blades, the lower ends of the demister blades are provided with the water collecting grooves, and the lower end of the water collecting groove is provided with the drainage groove which is used for collecting washing water and finally converging the washing water into the collecting pipe, so that the washing water can be finally recovered, the recovery of the washing water is realized, and a water collecting device is not required to be arranged below the demister.
Description
Technical Field
The invention belongs to the field of flue gas environment-friendly devices, and relates to a ridge type demister capable of recycling washing water, a demisting system and a wet desulphurization system.
Background
The wet desulphurization process accounts for more than 92% of the flue gas desulphurization process, and the wet desulphurization process is widely applied to industries such as electric power, steel and the like. The demister is used as a main device in the wet desulphurization system, has the function of efficiently intercepting slurry fog drops, and avoids flue gas carrying gypsum liquid drops to be discharged into the atmosphere. The demister mainly has the types of plate type, tube type, ridge type and the like, wherein the ridge type demister is widely applied to a wet desulphurization system due to the characteristics of high efficiency and reliability. The defroster need regularly wash through arranging the washing nozzle in the defroster top, and the defroster sparge water is as the main technology moisturizing of absorption tower, and the water consumption is huge. There is a great potential for water conservation in the form of cascade water.
The existing device for recovering the flushing water of the demister is of a liquid receiving disc type below the demister, and the mode has the defects of large occupied space, certain resistance and large engineering implementation difficulty.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a ridge demister, a demisting system and a wet desulphurization system capable of recycling washing water.
The technical scheme adopted by the invention is as follows:
ridge formula defroster of recoverable sparge water, including ridge formula defroster and collecting pipe, the bottom of every defroster blade of ridge formula defroster is equipped with receives the basin, receives the basin and sets up along defroster blade length direction, and the bottom of every defroster blade is provided with the drainage groove in the lower one end of receiving the basin, all drainage grooves and collecting pipe intercommunication.
Preferably, the demister blades are provided with channels.
Preferably, the bottom of the demister blade is provided with a bent part bent upwards for forming a water collecting tank.
Preferably, the collecting pipe is arranged at a position opposite to the lower edge of the ridge type demister, and the collecting pipe is correspondingly arranged on the lower edges of two sides of the ridge type demister.
Preferably, the collecting pipe is arranged obliquely with respect to a lower edge of the ridge mist eliminator.
The invention also provides a demisting system, which comprises a demister washing water device and the ridge type demister capable of recycling washing water, wherein the demister washing water device comprises a demister washing water nozzle and a water supply device connected with the demister washing water nozzle, the demister washing water nozzle is arranged above the ridge type demister, and the collecting pipe is connected with a washing water outlet pipe.
Preferably, water supply installation includes sparge water recovery tank and defroster wash water pump, and the entry and the sparge water recovery tank of defroster wash water pump are connected, and the export of defroster wash water pump is passed through the wash water pipeline and is connected with defroster wash water nozzle, and the wash water eduction tube is connected with wash water recovery tank.
Preferably, be connected with the technology water moisturizing pipeline on the sparge water recovery tank, the bottom of sparge water recovery tank is equipped with the evacuation mouth, and evacuation mouth department is equipped with the solenoid valve, is equipped with the recycled water quality monitoring device who is used for detecting the recovery aquatic and contains solid volume in the sparge water recovery tank, recycled water quality monitoring device with solenoid valve and defroster wash water pump are connected.
The invention also provides a wet desulphurization system, which comprises an absorption tower and the defogging system, wherein the defogger flushing water nozzle and the ridge defogger are arranged in the absorption tower.
Preferably, be provided with a plurality of layers of ridge defroster along flue gas flow direction in the absorption tower, the collecting pipe and same sparge water delivery pipe intercommunication of the adjacent one side of all ridge defroster, the sparge water delivery pipe sets up along flue gas flow direction in following the absorption tower, and every layer of ridge defroster's top all corresponds and is provided with defroster washing water nozzle, and all demisters washing water nozzles are connected with same water supply installation.
The invention has the following beneficial effects:
in the ridge type demister capable of recycling flushing water, the water collecting groove is arranged at the bottom of each demister blade, water flowing down along the demister blades can be contained and received by the water collecting groove, the water on the demister blades is prevented from directly falling, the drainage groove is arranged at the lower end of the water collecting groove at the bottom of each demister blade and is communicated with the collecting pipe, the water contained and received in the water collecting groove can be guided into the collecting pipe by the drainage groove, and the collected water can be intensively guided by the collecting pipe, so that the high-efficiency recycling of the flushing water can be realized, a water collecting device (such as a liquid collecting disc) does not need to be arranged below the demister, and the system arrangement and the resistance are hardly influenced.
Furthermore, the demister blades are provided with channels, so that the trapping effect of the demister blades on water vapor in flue gas can be increased.
Further, the bottom of defroster blade is equipped with the curved part that is used for forming the water collecting tank of bending upward, consequently receives water tank and defroster blade formula structure as an organic whole, and spare part is few, the wholeness is good, also easily realizes in processing.
Further, the collector pipe is arranged obliquely relative to the lower edge of the ridge type demister, so that recovered water in the collector pipe is timely discharged through gravity, and deposited dirt in the collector pipe is prevented.
In the wet desulphurization system, the flushing water guide pipe is arranged along the flowing direction of the flue gas in the absorption tower, so that the influence of the flushing water guide pipe on the flue gas flowing in the absorption tower can be reduced as much as possible, and the flowing resistance is reduced.
Drawings
FIG. 1 is a schematic diagram of the wet desulfurization system of the present invention.
FIG. 2 is a schematic view of a portion (at the demister blades) of a ridge demister for recovering rinse water according to the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of a wet desulfurization system of the present invention.
Wherein, 1 is the absorption tower, 2 is ridge defroster, 2-1 is the defroster blade, 2-2 is the flexion, 3 is the collecting pipe, 4 is the channel, 5 is the receipts basin, 6 is the drainage groove, 7 is defroster washing nozzle, 8 is sparge water recovery tank, 9 is defroster washing water pump, 10 is the wash water pipeline, 11 is the process water moisturizing pipeline, 12 is defroster sparge water device, 13-pit, 14 is the sparge water eduction tube.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1 and 2, the ridge type demister capable of recycling washing water comprises a ridge type demister and a collecting pipe 3, wherein a water collecting groove 5 is arranged at the bottom of each demister blade 2-1 of the ridge type demister, the water collecting grooves 5 are arranged along the length direction of the demister blades 2-1, a drainage groove 6 is arranged at the lower end of the water collecting groove 5 at the bottom of each demister blade 2-1, and all the drainage grooves 6 are communicated with the collecting pipe 3. As shown in figure 1, the ridge type demister capable of recycling washing water of the invention utilizes the inclined arrangement characteristic of the ridge type demister blades because the middle part (ridge) is higher and each demister blade 2-1 at two sides is in an inclined arrangement mode with one higher end and one lower end, a water collecting groove 5 is arranged at the lower end of each demister blade 2-1, and a drainage groove 6 is arranged at the lower end of the water collecting groove 5 and is used for collecting washing water and finally converging the washing water into a collecting pipe 3, so that the washing water can be recycled finally.
Referring to fig. 2, a demister blade 2-1 is provided with a channel 4 as a preferred embodiment of the present invention.
Referring to fig. 2, the bottom of the demister blade 2-1 is provided with a bent part 2-2 bent upward to form a water receiving tank 5 as a preferred embodiment of the present invention.
Referring to fig. 1 and 3, a collecting pipe 3 is provided at a position facing a lower edge of a ridge mist eliminator, and the collecting pipe 3 is provided at both lower edges of the ridge mist eliminator.
Referring to fig. 1-3, as a preferred embodiment of the present invention, the manifold 3 is disposed at an angle with respect to the lower edge of the ridge mist eliminator (similar to the position of the eaves of a roof).
Referring to fig. 1, the present invention further provides a demisting system, which includes a demister washing water device 12 and the ridge demister of the present invention capable of recovering washing water, wherein the demister washing water device 12 includes a demister washing water nozzle and a water supply device connected to the demister washing water nozzle, the demister washing water nozzle is disposed above the ridge demister, and the collecting pipe 3 is connected to a washing water outlet pipe 14. According to the invention, the efficient water collection is realized on the premise of not additionally arranging a water collection device below the demister, and the pilot test shows that washing water of the demister is atomized by a nozzle above the demister due to the atomizing nozzle, most of water drops sprayed into the demister are attached to the blades, automatically flow to the lower points of the blades and then are collected and dripped to the absorption tower.
Referring to fig. 1, a water supply apparatus according to a preferred embodiment of the present invention includes a washing water recovery tank 8 and a demister washing water pump 9, an inlet of the demister washing water pump 9 is connected to the washing water recovery tank 8, an outlet of the demister washing water pump 9 is connected to a demister washing water nozzle through a washing water pipe 10, and a washing water delivery pipe 14 is connected to the washing water recovery tank 8.
As a preferred embodiment of the present invention, the rinse water recovery tank 8 is connected to a process water replenishing pipeline 11, the bottom of the rinse water recovery tank 8 is provided with an evacuation port, an electromagnetic valve is provided at the evacuation port, a rinse water quality monitoring device for detecting the solid content in the recovered water is provided in the rinse water recovery tank 8, and the rinse water quality monitoring device is connected to the electromagnetic valve and the demister rinse water pump 9. The invention can periodically sample or monitor the solid content of the recovered water in the recovery water tank 8 on line at the recovery water tank 8, when the solid content is higher than the preset value, the recovered water in the recovery water tank 8 can be considered to be discharged to a pit 13 through a vent, and is supplemented to a slurry pool in the absorption tower 1, and fresh process water is supplemented to enter the recovery water tank 8 through a process water supplementing pipeline 11.
Referring to fig. 1 and 3, the present invention further provides a wet desulfurization system, comprising an absorption tower 1 and the defogging system of the present invention as described above, wherein a defogger flushing water nozzle and a ridge defogger are disposed in the absorption tower 1.
As a preferred embodiment of the present invention, referring to fig. 1 and 3, a plurality of layers of ridge demisters are arranged in an absorption tower 1 along a flue gas flow direction, a collecting pipe 3 on one side adjacent to all ridge demisters is communicated with a same washing water outlet pipe 14, the washing water outlet pipe 14 is arranged in the absorption tower 1 along the flue gas flow direction, demister washing water nozzles are correspondingly arranged above each layer of ridge demisters, and all demister washing water nozzles are connected with a same water supply device.
Examples
Referring to fig. 1 to 3, the wet desulfurization system of the present invention comprises an absorption tower 1, a ridge type demister 2, a washing water collecting pipe 3, a demister washing device 12, a washing water recovery tank 8, a demister washing water pump 9, a washing water pipeline 10 and a process water replenishing pipeline 11, wherein a channel 4, a recovery groove 5 and a drainage groove 6 are arranged on a demister blade 2-1; the demister washing water device 12 comprises a demister washing water pipeline 10 and a demister washing nozzle 7, and the washing nozzle is uniformly arranged above the demister to realize high-efficiency washing of the demister.
The specific implementation process of the invention is as follows:
in the absorption tower 1, when the flue gas containing liquid drops passes through the ridge type demister 2, the liquid drops are removed under the interception action of the channels 4 on the inner side and the outer side of the demister blades 2-1, and the flue gas is discharged through the demister outlet section. Because the corrosive substance that contains in the liquid drop can produce the corrosive action to defogging blade surface, consequently wash ridge defroster 2 through ridge defroster 2 top defroster washing unit 12 regularly. The cleaning process requires a large amount of washing water. The defroster sparge water evenly sprays to the defroster blade inside through atomizing nozzle, and adnexed droplet can be along defogging blade surface whereabouts on the blade under the effect of sparge water. Because ridge defroster 2 adopts the slope arrangement mode, wash the droplet and can constantly collect at blade surface whereabouts in-process, form big liquid droplet, finally get into sparge water recovery tank 8 via collecting vat 5 and recovery water collecting pipe 3, realize the online recovery of sparge water, recycle water passes through defroster wash water pump and wash water pipeline 10 and recycles once more and get into in the absorption tower 1 and spray and wash in the recovery tank, but the technology moisturizing volume in this mode greatly reduced absorption tower 1, realize the energy-efficient operation of absorption tower.
In addition, the recovery water tank 8 is provided with a recovered water quality monitoring device, when the solid content of the recovered water is lower than 0.5%, the recovered water is pumped to the demister 2 through a demister flushing water pump 9 for next flushing, so that the cyclic utilization of the process water is realized; when the solid content of the recovered water is more than 0.5 percent, the recovered water in the recovered water tank 8 is discharged to a pit 12 through a drain port, then is supplemented into a slurry tank in the absorption tower 1, and then is supplemented with fresh process water through a process water supplementing pipe 11 to enter the recovered water tank 8.
In conclusion, the invention is provided with the water recovery groove, thereby realizing the high-efficiency recovery of the flushing water, needing no additional water recovery device and having no influence on the system arrangement and the resistance; the invention can enhance the fog drop trapping efficiency of the flue gas under the working condition of low flow velocity through the disturbance of the inlet section. The invention increases the comprehensive removal efficiency of liquid drops in the air flow and realizes the online washing of the demister, namely the recovery of the washing water.
Claims (10)
1. The ridge type demister capable of recycling flushing water is characterized by comprising a ridge type demister and a collecting pipe (3), wherein a water collecting groove (5) is arranged at the bottom of each demister blade (2-1) of the ridge type demister, the water collecting groove (5) is arranged along the length direction of each demister blade (2-1), a drainage groove (6) is formed in the lower end of the water collecting groove (5) at the bottom of each demister blade (2-1), and all the drainage grooves (6) are communicated with the collecting pipe (3).
2. A ridge mist eliminator for retrieving washing water according to claim 1, characterized in that the mist eliminator blades (2-1) are provided with channels (4).
3. A ridge mist eliminator as claimed in claim 1, characterised in that the bottom of the mist eliminator blades (2-1) is provided with a bent up section (2-2) forming a water collection trough (5).
4. A ridge mist eliminator as claimed in claim 1 in which a manifold (3) is provided opposite the lower edge of the ridge mist eliminator, the manifold (3) being provided on both sides of the ridge mist eliminator.
5. A ridge mist eliminator as claimed in claim 4 in which the collector pipe (3) is inclined relative to the lower edge of the ridge mist eliminator.
6. Demisting system, characterized in that it comprises a demister washing water device (12) and a ridge demister of recoverable washing water according to any of claims 1-5, the demister washing water device (12) comprising a demister washing water nozzle and a water supply device connected to the demister washing water nozzle, the demister washing water nozzle being arranged above the ridge demister, the collecting pipe (3) being connected to a washing water outlet pipe (14).
7. A defogging system as recited in claim 6, wherein the water supply device comprises a rinse water recovery tank (8) and a defogger rinse water pump (9), the defogger rinse water pump (9) having an inlet connected to the rinse water recovery tank (8), the defogger rinse water pump (9) having an outlet connected to a defogger rinse water nozzle via a rinse water line (10), and a rinse water outlet pipe (14) connected to the rinse water recovery tank (8).
8. The defogging system according to claim 7, wherein a process water replenishing pipeline (11) is connected to the flushing water recovery tank (8), an evacuation port is arranged at the bottom of the flushing water recovery tank (8), an electromagnetic valve is arranged at the evacuation port, a recovered water quality monitoring device for detecting the solid content in the recovered water is arranged in the flushing water recovery tank (8), and the recovered water quality monitoring device is connected with the electromagnetic valve and a defogger flushing water pump (9).
9. Wet desulphurization system, comprising an absorption tower (1) and a demisting system according to any of claims 6 to 8, wherein a demister flushing water nozzle and a ridge demister are arranged in the absorption tower (1).
10. The wet desulphurization system according to claim 9, wherein a plurality of layers of ridge demisters are arranged in the absorption tower (1) along the flue gas flow direction, the collecting pipes (3) on the adjacent sides of all the ridge demisters are communicated with the same washing water outlet pipe (14), the washing water outlet pipes (14) are arranged in the absorption tower (1) along the flue gas flow direction, demister washing water nozzles are correspondingly arranged above each layer of ridge demisters, and all the demister washing water nozzles are connected with the same water supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110961960.4A CN113477037A (en) | 2021-08-20 | 2021-08-20 | Ridge type demister capable of recycling flushing water, demisting system and wet desulphurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110961960.4A CN113477037A (en) | 2021-08-20 | 2021-08-20 | Ridge type demister capable of recycling flushing water, demisting system and wet desulphurization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113477037A true CN113477037A (en) | 2021-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110961960.4A Pending CN113477037A (en) | 2021-08-20 | 2021-08-20 | Ridge type demister capable of recycling flushing water, demisting system and wet desulphurization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113477037A (en) |
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2021
- 2021-08-20 CN CN202110961960.4A patent/CN113477037A/en active Pending
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