CN216703931U - Wet desulphurization system - Google Patents
Wet desulphurization system Download PDFInfo
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- CN216703931U CN216703931U CN202122558457.2U CN202122558457U CN216703931U CN 216703931 U CN216703931 U CN 216703931U CN 202122558457 U CN202122558457 U CN 202122558457U CN 216703931 U CN216703931 U CN 216703931U
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- gypsum
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Abstract
The utility model discloses a wet desulphurization system, which comprises a desulphurization tower, an oxidation fan, a gypsum pump, a gypsum dewatering device, a filtrate tank, a limestone slurry tank and a limestone powder bin. The oxidation fan oxidizes the calcium sulfite in the desulfurizing tower to form gypsum, so that the links of construction of an oxidation tank and slurry conveying are reduced, and the operation efficiency is improved. The gypsum filtrate can be recycled in the system, thereby greatly reducing the use of process water and the discharge of sewage.
Description
Technical Field
The utility model relates to the field of flue gas treatment, in particular to a wet desulphurization system.
Background
Flue gas desulfurization means are divided into dry desulfurization and wet desulfurization. The dry desulfurization is to remove sulfur dioxide from flue gas by adopting powder or granular absorbent, adsorbent or catalyst, and has the advantages of simple process, no waste water and low energy consumption. The wet desulphurization means that sulfur dioxide in flue gas is removed by using a liquid absorbent, and compared with the dry desulphurization, the wet desulphurization has the advantages of high desulphurization efficiency and easiness in control, but the wet desulphurization can generate waste water and has higher energy consumption.
For large-scale factories in industries such as ceramic production, the amount of flue gas generated in the production process is large, correspondingly, the amount of waste water generated by wet desulphurization is also large, great treatment pressure is caused to a sewage treatment system, and the operation cost is high. At present, the national emission standard of enterprises with high emission and high energy consumption is increasingly improved, and the existing wet desulphurization system generates excessive waste water and is difficult to meet the requirements.
It is seen that improvements and enhancements to the prior art are needed.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, the present invention is directed to a wet desulfurization system, which is designed to improve the operation efficiency and reduce the generation of wastewater.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a wet desulphurization system comprises a desulphurization tower, an oxidation fan, a gypsum pump, a gypsum dewatering device, a filtrate tank, a limestone slurry tank and a limestone powder bin; the oxidation fan is connected with the lower part of the desulfurizing tower through a gas conveying pipeline; the gypsum pump is connected with the desulfurization tower and is used for conveying the gypsum slurry in the desulfurization tower to the gypsum dehydration device; the filtrate tank is used for collecting filtrate formed by the gypsum dewatering device; the filtrate tank conveys filtrate to the desulfurizing tower or the limestone slurry tank through a filtrate pump; the discharge hole of the limestone powder bin is communicated with the limestone slurry pool; and the limestone slurry pool conveys limestone slurry to the desulfurizing tower through a slurry pump.
The wet desulphurization system further comprises a circulating pump, wherein the circulating pump is connected with the desulphurization tower and used for conveying the slurry at the lower part of the desulphurization tower to a spraying device arranged at the upper part of the desulphurization tower.
The wet desulphurization system is characterized in that the limestone slurry pool is also connected with a slurry pump, and the slurry pump is used for conveying limestone slurry to the spraying device.
The wet desulphurization system is characterized in that the limestone slurry tank is connected with a process water pipeline.
The wet desulphurization system is characterized in that the spraying device is connected with the process water pipeline.
The wet desulphurization system is characterized in that the limestone slurry pool is connected with the oxidation fan through a gas conveying pipeline.
The wet desulphurization system is characterized in that the limestone powder bin is provided with a fluidization plate, and the fluidization plate is connected with the oxidation fan through a gas conveying pipeline.
The wet desulphurization system is characterized in that a plurality of discharging channels are arranged at the lower part of the limestone powder bin, and a plurality of vibrating devices are respectively arranged on the discharging channels.
Has the advantages that:
the utility model provides a wet desulphurization system, wherein the lower part of a desulphurization tower is connected with an oxidation fan, calcium sulfite in the desulphurization tower is oxidized to form gypsum, the links of construction of an oxidation tank and slurry conveying are reduced, and the operation efficiency is improved. The filtrate tank in the wet desulphurization system is connected with the limestone slurry tank or the desulphurization tower, and the gypsum filtrate is used for preparing limestone slurry or flows back to the desulphurization tower, so that the filtrate is recycled, and the use of process water and the discharge of sewage are greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of a wet desulfurization system provided by the present invention.
Description of the main element symbols: 1-a desulfurizing tower, 2-an oxidation fan, 3-a gypsum pump, 4-a gypsum dehydration device, 5-a filtrate tank, 6-a limestone slurry tank, 7-a limestone powder bin, 8-a gas conveying pipeline, 9-a filtrate pump, 10-a circulating pump, 11-a spraying device, 12-a process water pipeline, 13-a fluidization plate, 14-a discharge channel, 15-a vibrating device, 16-a demister and 17-a slurry pump.
Detailed Description
The present invention provides a wet desulfurization system, and in order to make the objects, technical solutions, and effects of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specified.
Referring to fig. 1, the present invention provides a wet desulfurization system, which includes a desulfurization tower 1, an oxidation fan 2, a gypsum pump 3, a gypsum dewatering device 4, a filtrate tank 5, a limestone slurry tank 6, and a limestone powder bin 7; the oxidation fan 2 is connected with the lower part of the desulfurizing tower 1 through a gas conveying pipeline 8; the gypsum pump 3 is connected with the desulfurization tower 1 and is used for conveying the gypsum slurry in the desulfurization tower 1 to the gypsum dehydration device 4; the filtrate pool 5 is used for collecting the filtrate formed by the gypsum dewatering device 4; the filtrate tank 5 respectively conveys filtrate to the desulfurizing tower 1 or the limestone slurry tank 6 through a filtrate pump 9; a discharge hole of the limestone powder bin 7 is communicated with the limestone slurry pool 6; the limestone slurry pool 6 delivers limestone slurry to the desulfurization tower 1 through a slurry pump 17. Oxidation fan 2 provides the oxidizing air for desulfurizing tower 1, further oxidizes the calcium sulfite into calcium sulfate in the thick liquid layer of desulfurizing tower 1, forms the sediment, discharges to outside oxidation pond oxidation again for among the prior art calcium sulfite thick liquid, and this implementation is novel area occupied is littleer, and reduces the thick liquid and carry the link, improves the operating efficiency. The gypsum pump 3 pumps the gypsum deposited at the bottom of the desulfurization tower 1 into the gypsum dehydration device 4, and the filtrate directly flows back to the desulfurization tower 1 for continuous use or is used for preparing new limestone slurry, so that the discharge of the filtrate is greatly reduced, calcium ions which are not fully reacted in the filtrate can be fully utilized, the waste of a desulfurizer is reduced, and the purposes of energy conservation and emission reduction are achieved. Specifically, the bottom of the filtrate tank 5 is connected with a sewage treatment system, and redundant filtrate is discharged to the sewage treatment system.
In one embodiment, the gypsum dewatering device 4 includes a cyclone and a vacuum belt dewaterer. The one-level dehydration carries out solid-liquid separation with the gypsum thick liquid through the swirler, then carries out the second grade through vacuum belt hydroextractor and dewaters, further reduces the water content of gypsum, the transportation and the processing in the later stage of being convenient for.
In one embodiment, the wet desulphurization system further comprises a circulation pump 10, wherein the circulation pump 10 is connected with the desulphurization tower 1 and is used for conveying slurry at the lower part of the desulphurization tower 1 to a spray device 11 arranged at the upper part of the desulphurization tower 1. The circulating pump 10 provides pressure for the slurry, the high-pressure slurry is ejected through the nozzles on the spraying device 11 to form spray, and the spray of the slurry is fully contacted with the flue gas in the falling process to absorb gases such as sulfur dioxide in the flue gas and finally returns to the lower part of the desulfurizing tower 1.
In one embodiment, a slurry pump 17 is further connected to the limestone slurry tank 6, and the slurry pump 17 is used for delivering limestone slurry to the spraying device 11. Aiming at the condition that the sulfur content of the flue gas is too large, the limestone slurry can be directly conveyed to the spraying device 11 from the limestone slurry pool 6, the alkalinity of the limestone slurry is stronger, and the formed spray can absorb more sulfur dioxide.
Specifically, the desulfurization tower 1 is further provided with a demister 16, and the demister 16 is located above the spraying device 11. The demister 16 is used for removing the acidic water mist formed after spraying, so that small water drops in the water mist are gathered into large water drops, the large water drops can overcome the ascending effect of air flow, and the large water drops drop under the action of self gravity, so that the acid-containing gas is prevented from being discharged out of the desulfurizing tower 1, and equipment such as a fan, a flue and the like connected behind the desulfurizing tower 1 is corroded. In one embodiment, the demister 16 is provided with a plurality of cleaning spray openings, and the cleaning spray openings regularly clean the demister 16 to prevent dust particles mixed with flue gas from blocking the demister 16.
In one embodiment, the limestone slurry pond 6 is connected to a process water pipeline 12. When the filtrate is insufficient, the process water is supplemented. The process water can be tap water or discharge water which reaches the standard after being treated by a sewage treatment system. In addition, the process water pipeline 12 can clean the limestone slurry pool 6 and the connecting pipeline regularly, so that the blockage caused by the long-term deposition of limestone is avoided.
In one embodiment, a process water pipe 12 is further connected to the spraying device 11, the process water pipe 12 is used for cleaning the spraying device 11, and emergency water can be provided for spraying to prevent the circulating pump 10 from malfunctioning or the slurry delivery pipe from being blocked.
In one embodiment, the limestone slurry pond 6 is connected to the oxidation fan 2 by a gas delivery line 8. Limestone slurry pond 6 adopts air stirring's mode to impel the limestone to distribute more evenly in the thick liquid, and air stirring is for only using mechanical stirring, and its scope of stirring is wider, and air intlet's the position that sets up is more nimble.
In one embodiment, the limestone powder bin 7 is provided with a fluidization plate 13, and the fluidization plate 13 is connected with the oxidation fan 2 through a gas conveying pipeline 8. The fluidization plate 13 can blow out dry gas, blow away limestone powder in the bin, reduce limestone agglomeration, on one hand, can reduce blocking of the discharge pipeline 14 by blocky limestone, and on the other hand, can make limestone disperse more uniformly in slurry when limestone slurry is prepared.
In one embodiment, a plurality of discharging channels 14 are provided at the lower part of the limestone powder bin 7, and a vibration device 15 is respectively provided on each of the discharging channels 14. Through many discharging channel 14 implementation ejection of compact reposition of redundant personnel, the limestone powder throughput of single discharging channel 14 reduces, and the back is reduced to discharging channel 14 cross-section, and the vibration wave that vibrating device 15 produced can run through its inside limestone powder, with the limestone powder vibration of caking. Furthermore, the discharge channel 14 is funnel-shaped, the discharge channel 14 becomes gradually narrower, and the vibration effect of the vibration device 15 is more obvious. The multi-channel discharging mode is adopted, even if one discharging channel 14 is blocked, the situation that the limestone powder bin 7 cannot discharge materials is avoided, and the limestone slurry can be normally prepared.
It should be understood that the technical solutions and the inventive concepts according to the present invention may be equally replaced or changed by those skilled in the art, and all such changes or substitutions should fall within the protection scope of the appended claims.
Claims (8)
1. A wet desulphurization system is characterized by comprising a desulphurization tower, an oxidation fan, a gypsum pump, a gypsum dewatering device, a filtrate tank, a limestone slurry tank and a limestone powder bin; the oxidation fan is connected with the lower part of the desulfurizing tower through a gas conveying pipeline; the gypsum pump is connected with the desulfurization tower and is used for conveying the gypsum slurry in the desulfurization tower to the gypsum dehydration device; the filtrate tank is used for collecting filtrate formed by the gypsum dewatering device; the filtrate tank conveys filtrate to the desulfurizing tower or the limestone slurry tank through a filtrate pump; the discharge hole of the limestone powder bin is communicated with the limestone slurry pool; and the limestone slurry pool conveys limestone slurry to the desulfurizing tower through a slurry pump.
2. The wet desulfurization system of claim 1, further comprising a circulation pump connected to the desulfurization tower for delivering the slurry in the lower portion of the desulfurization tower to a spray device disposed in the upper portion of the desulfurization tower.
3. The wet desulfurization system of claim 2, wherein a slurry pump is further connected to the limestone slurry tank for delivering limestone slurry to the spray device.
4. The wet desulfurization system of claim 2, wherein a process water conduit is connected to the limestone slurry pond.
5. The wet desulfurization system of claim 4, wherein the spray device is connected to the process water conduit.
6. The wet desulfurization system of claim 1, wherein the limestone slurry pond is connected to the oxidation blower via a gas delivery conduit.
7. The wet desulfurization system of claim 1, wherein the limestone powder silo is provided with a fluidization plate connected to the oxidation fan by a gas delivery conduit.
8. The wet desulphurization system according to claim 1, wherein a plurality of discharging channels are arranged at the lower part of the limestone powder bin, and a vibration device is respectively arranged on each discharging channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122558457.2U CN216703931U (en) | 2021-10-22 | 2021-10-22 | Wet desulphurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122558457.2U CN216703931U (en) | 2021-10-22 | 2021-10-22 | Wet desulphurization system |
Publications (1)
| Publication Number | Publication Date |
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| CN216703931U true CN216703931U (en) | 2022-06-10 |
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| CN202122558457.2U Active CN216703931U (en) | 2021-10-22 | 2021-10-22 | Wet desulphurization system |
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| CN (1) | CN216703931U (en) |
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2021
- 2021-10-22 CN CN202122558457.2U patent/CN216703931U/en active Active
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