CN219526444U - Desulfurization wastewater zero-discharge system of coal-fired power plant - Google Patents
Desulfurization wastewater zero-discharge system of coal-fired power plant Download PDFInfo
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- CN219526444U CN219526444U CN202320532591.1U CN202320532591U CN219526444U CN 219526444 U CN219526444 U CN 219526444U CN 202320532591 U CN202320532591 U CN 202320532591U CN 219526444 U CN219526444 U CN 219526444U
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- flue
- reverse osmosis
- osmosis membrane
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- desulfurization wastewater
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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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The utility model discloses a desulfurization wastewater zero-discharge system of a coal-fired power plant, which comprises the following components: the device comprises a softening and clarifying tank, wherein an ultrafiltration membrane is arranged at the output end of the softening and clarifying tank, a reverse osmosis membrane combination is arranged at the output end of the ultrafiltration membrane, a drying tower is arranged at the output end of the reverse osmosis membrane combination, a main flue is arranged at the output end of the drying tower, a bypass leading-in flue and a bypass leading-out flue are respectively arranged between the main flue and the drying tower, an air preheater is arranged in the main flue, and the bypass leading-in flue and the bypass leading-out flue are positioned at two sides of the air preheater. The desulfurization wastewater is reduced by the relatively mature and cheap dosing softening and membrane concentration process in the early stage, so that the output of a subsequent evaporation curing system and the investment cost of the subsequent evaporation curing system are effectively reduced; the reverse osmosis fresh water is recycled and reused, can be used as water supplement or other purposes of the front-end desulfurization process, saves water resources and reduces water cost; the bypass flue evaporation has little influence on the main flue system, and simultaneously, high-temperature flue gas is utilized, so that the manufacturing cost and the cost are saved.
Description
Technical Field
The utility model belongs to the technical field of desulfurization waste water discharge of power plants, and particularly relates to a zero discharge system for desulfurization waste water of a coal-fired power plant.
Background
At present, limestone-gypsum wet desulfurization is a mainstream flue gas desulfurization technology of a coal-fired power plant, and desulfurization wastewater generated by flue gas of the coal-fired power plant has the characteristics of high suspended matter concentration, high salt content, complex components and the like.
Due to the specificity, complexity and strong corrosiveness of the components of the desulfurization wastewater, the desulfurization wastewater becomes a key factor for restricting the zero emission of the desulfurization wastewater of the coal-fired power plant. Therefore, a new solution is needed.
Disclosure of Invention
The utility model aims to provide a desulfurization wastewater zero-emission system of a coal-fired power plant, which solves the problem that desulfurization wastewater becomes a key factor for restricting zero emission of desulfurization wastewater of the coal-fired power plant due to the specificity, complexity and strong corrosiveness of components of the desulfurization wastewater.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a desulfurization wastewater zero-discharge system of a coal-fired power plant, comprising: the device comprises a softening and clarifying tank, wherein an ultrafiltration membrane is arranged at the output end of the softening and clarifying tank, a reverse osmosis membrane combination is arranged at the output end of the ultrafiltration membrane, a drying tower is arranged at the output end of the reverse osmosis membrane combination, a main flue is arranged at the output end of the drying tower, a bypass leading-in flue and a bypass leading-out flue are respectively arranged between the main flue and the drying tower, an air preheater is arranged in the main flue, and the bypass leading-in flue and the bypass leading-out flue are positioned at two sides of the air preheater.
As a preferred embodiment of the present utility model, the concentrated water outlet of the reverse osmosis membrane combination is communicated with a drying tower.
As a preferred embodiment of the present utility model, the outlet of the ultrafiltration membrane is in communication with the inlet of the reverse osmosis membrane assembly.
As a preferred embodiment of the utility model, the reverse osmosis membrane combination is formed by connecting a seawater desalination reverse osmosis membrane and a disc-tube type reverse osmosis membrane.
In a preferred embodiment of the present utility model, the reverse osmosis membrane assembly is formed by connecting a brackish water reverse osmosis membrane and a pipe network reverse osmosis membrane.
Compared with the prior art, the utility model has the following beneficial effects:
the softening and clarifying tank is filled with desulfurization wastewater and the wastewater is discharged from the three-header, and after softening and clarifying by adding a softening agent, the supernatant enters an ultrafiltration membrane. The ultrafiltration membrane further separates and filters the wastewater, so that the stable operation of the subsequent reverse osmosis membrane combination is ensured. The outlet of the ultrafiltration membrane is communicated with the inlet of the reverse osmosis membrane combination, the reverse osmosis membrane combination purifies and purifies the incoming water, fresh water is recycled and reused as water supplement or other purposes of the front-end desulfurization process, and the concentrated water outlet of the reverse osmosis membrane combination is communicated with the drying tower. The drying tower is provided with a rotary atomizer to atomize the desulfurized waste water into droplet groups of 30-100 mu m. One end of the bypass introducing flue is connected with the main flue, the other end of the bypass introducing flue is communicated with the drying tower, the joint of the bypass introducing flue and the main flue is positioned at the front end of the air preheater, and the smoke temperature in the bypass introducing flue is 330-350 ℃. One end of the bypass leading-out flue is connected with the main flue, the other end of the bypass leading-out flue is communicated with the drying tower, the joint of the bypass leading-out flue and the main flue is positioned at the rear end of the air preheater, and particles generated after the desulfurization wastewater is evaporated and solidified enter the main flue along the bypass leading-out flue and are removed after entering the dust remover along with the flue gas of the main flue, so that zero emission of the desulfurization wastewater is realized.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model.
In the figure: 1. softening and clarifying the pool; 2. an ultrafiltration membrane; 3. a reverse osmosis membrane combination; 4. a drying tower; 5. a bypass is introduced into the flue; 6. the bypass is led out of the flue; 7. a main flue; 8. an air preheater.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the present utility model provides a technical solution: a desulfurization wastewater zero-discharge system of a coal-fired power plant, comprising: the softening and clarifying tank 1, the output of softening and clarifying tank 1 is provided with milipore filter 2 and milipore filter 2's output is provided with reverse osmosis membrane combination 3, reverse osmosis membrane combination 3's output is provided with drying tower 4 and drying tower 4's output is provided with main flue 7, be provided with bypass between main flue 7 and the drying tower 4 respectively and introduce flue 5 and bypass and draw forth flue 6, the inside of main flue 7 is provided with air preheater 8 and bypass and introduce flue 5 and bypass and draw forth flue 6 and be located air preheater 8's both sides, reverse osmosis membrane combination 3's dense water export and drying tower 4 intercommunication, the export of milipore filter 2 and reverse osmosis membrane combination 3's entry intercommunication, and the three headers of desulfurization waste water of softening and clarifying tank 1 lets in desulfurization waste water and goes out water, and after the softening and clarifying is carried out in the throwing softening agent, the supernatant fluid enters milipore filter 2. The ultrafiltration membrane 2 further separates and filters the wastewater, so that the stable operation of the subsequent reverse osmosis membrane combination 3 is ensured. The outlet of the ultrafiltration membrane 2 is communicated with the inlet of the reverse osmosis membrane combination 3, the reverse osmosis membrane combination 3 purifies and purifies the incoming water, and fresh water is recycled and reused as water supplement or other purposes of the front-end desulfurization process, and the concentrated water outlet of the reverse osmosis membrane combination 3 is communicated with the drying tower 4. The drying tower 4 is provided with a rotary atomizer to atomize the desulfurized waste water into a droplet group of 30-100 μm. One end of the bypass introducing flue 5 is connected with the main flue 7, the other end of the bypass introducing flue is communicated with the drying tower 4, the joint of the bypass introducing flue 5 and the main flue 7 is positioned at the front end of the air preheater 8, and the smoke temperature in the bypass introducing flue 5 is 330-350 ℃. One end of a bypass leading-out flue 6 is connected with the main flue 7, the other end of the bypass leading-out flue is communicated with the drying tower 4, the joint of the bypass leading-out flue 6 and the main flue 7 is positioned at the rear end of the air preheater 8, and particles generated after the desulfurization wastewater is evaporated and solidified enter the main flue 7 along the bypass leading-out flue 6 and are removed after entering the dust remover along with the flue gas of the main flue 7, so that zero emission of the desulfurization wastewater is realized.
Example 1
Further improved, the reverse osmosis membrane combination 3 is formed by connecting a sea water desalination reverse osmosis membrane and a disc-tube type reverse osmosis membrane, the softening agent is a combination of sodium hydroxide and sodium carbonate, the reverse osmosis membrane combination 3 is formed by connecting a sea water desalination reverse osmosis membrane (SWRO) and a disc-tube type reverse osmosis membrane (DTRO), the concentrated water generated after sewage is purified by SWRO is purified by the DTRO for the second time, and the concentrated water generated by the DTRO purification is the concentrated water of the reverse osmosis membrane combination 33. Fresh water generated by purifying SWRO and DTRO is recovered and reused after being collected.
Example 2
Further improved, as shown in fig. 1: the reverse osmosis membrane combination 3 is formed by connecting a brackish water reverse osmosis membrane and a pipe network type reverse osmosis membrane, the reverse osmosis membrane combination 3 is formed by connecting a brackish water reverse osmosis membrane (BWRO) and a pipe network type reverse osmosis membrane (STRO), concentrated water generated after sewage is purified by the BWRO is purified by the STRO for the second time, the concentrated water generated by the STRO purification is the concentrated water of the reverse osmosis membrane combination 3, and fresh water generated by the BWRO and the STRO purification is recovered and reused after being collected.
According to the utility model, the softening and clarifying tank 1 is filled with desulfurization wastewater and the wastewater is discharged from the three-header, and after softening and clarifying are carried out by adding a softening agent, the supernatant enters the ultrafiltration membrane 2. The ultrafiltration membrane 2 further separates and filters the wastewater, so that the stable operation of the subsequent reverse osmosis membrane combination 3 is ensured. The outlet of the ultrafiltration membrane 2 is communicated with the inlet of the reverse osmosis membrane combination 3, the reverse osmosis membrane combination 3 purifies and purifies the incoming water, and fresh water is recycled and reused as water supplement or other purposes of the front-end desulfurization process, and the concentrated water outlet of the reverse osmosis membrane combination 3 is communicated with the drying tower 4. The drying tower 4 is provided with a rotary atomizer to atomize the desulfurized waste water into a droplet group of 30-100 μm. One end of the bypass introducing flue 5 is connected with the main flue 7, the other end of the bypass introducing flue is communicated with the drying tower 4, the joint of the bypass introducing flue 5 and the main flue 7 is positioned at the front end of the air preheater 8, and the smoke temperature in the bypass introducing flue 5 is 330-350 ℃. One end of a bypass leading-out flue 6 is connected with the main flue 7, the other end of the bypass leading-out flue is communicated with the drying tower 4, the joint of the bypass leading-out flue 6 and the main flue 7 is positioned at the rear end of the air preheater 8, and particles generated after the desulfurization wastewater is evaporated and solidified enter the main flue 7 along the bypass leading-out flue 6 and are removed after entering the dust remover along with the flue gas of the main flue 7, so that zero emission of the desulfurization wastewater is realized.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (5)
1. A desulfurization wastewater zero release system of coal fired power plant, its characterized in that: comprising the following steps: softening clarification tank (1), the output of softening clarification tank (1) is provided with milipore filter (2) and milipore filter (2) is provided with reverse osmosis membrane combination (3), the output of reverse osmosis membrane combination (3) is provided with drying tower (4) and drying tower (4) is provided with main flue (7), be provided with bypass between main flue (7) and drying tower (4) and introduce flue (5) and bypass between respectively and draw forth flue (6), the inside of main flue (7) is provided with air preheater (8) and bypass and draws in flue (5) and bypass and draw forth flue (6) and be located the both sides of air preheater (8).
2. The desulfurization wastewater zero-emission system of the coal-fired power plant according to claim 1, wherein: the concentrated water outlet of the reverse osmosis membrane combination (3) is communicated with the drying tower (4).
3. The desulfurization wastewater zero-emission system of the coal-fired power plant according to claim 1, wherein: the outlet of the ultrafiltration membrane (2) is communicated with the inlet of the reverse osmosis membrane combination (3).
4. The desulfurization wastewater zero-emission system of the coal-fired power plant according to claim 1, wherein: the reverse osmosis membrane combination (3) is formed by connecting a seawater desalination reverse osmosis membrane and a disc-tube type reverse osmosis membrane.
5. The desulfurization wastewater zero-emission system of the coal-fired power plant according to claim 1, wherein: the reverse osmosis membrane combination (3) is formed by connecting a brackish water reverse osmosis membrane and a pipe network reverse osmosis membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320532591.1U CN219526444U (en) | 2023-03-19 | 2023-03-19 | Desulfurization wastewater zero-discharge system of coal-fired power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320532591.1U CN219526444U (en) | 2023-03-19 | 2023-03-19 | Desulfurization wastewater zero-discharge system of coal-fired power plant |
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| CN219526444U true CN219526444U (en) | 2023-08-15 |
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| CN202320532591.1U Active CN219526444U (en) | 2023-03-19 | 2023-03-19 | Desulfurization wastewater zero-discharge system of coal-fired power plant |
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- 2023-03-19 CN CN202320532591.1U patent/CN219526444U/en active Active
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