CN215403556U - Recycling treatment system for thermal power plant circulating water sewage - Google Patents
Recycling treatment system for thermal power plant circulating water sewage Download PDFInfo
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- CN215403556U CN215403556U CN202120983711.0U CN202120983711U CN215403556U CN 215403556 U CN215403556 U CN 215403556U CN 202120983711 U CN202120983711 U CN 202120983711U CN 215403556 U CN215403556 U CN 215403556U
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- water
- power plant
- sewage
- circulating water
- electric desalting
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000010865 sewage Substances 0.000 title claims abstract description 47
- 238000004064 recycling Methods 0.000 title claims abstract description 19
- 238000011033 desalting Methods 0.000 claims abstract description 34
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 31
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 31
- 230000003197 catalytic effect Effects 0.000 claims abstract description 27
- 230000003647 oxidation Effects 0.000 claims abstract description 27
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 27
- 239000000126 substance Substances 0.000 claims abstract description 5
- 239000012528 membrane Substances 0.000 claims description 11
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 238000005352 clarification Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000009295 crossflow filtration Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Images
Classifications
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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
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- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a recycling treatment system for circulating water and sewage of a thermal power plant, which comprises a softener, a catalytic oxidation device, an ultrafiltration device, a reverse osmosis device and an electric desalting device which are sequentially connected through pipelines; circulating water sewage enters a reverse osmosis device after being treated by a softener, a catalytic oxidation device and an ultrafiltration device in sequence, the reverse osmosis device sends concentrated water into an electric desalting device, and produced water is sent into a chemical make-up water treatment system of a power plant; the electric desalting device takes the electric desalting produced water as the circulating water make-up water of the power plant, and discharges the desalted concentrated water to be further processed. The utility model realizes the recycling of reverse osmosis produced water and electric desalting produced water, and has the advantages of good treatment effect, low system maintenance cost and simple operation.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a sewage reuse treatment system.
Background
With the increasingly strict national requirements on wastewater emission reduction of industrial enterprises, each power generation enterprise is successively carrying out zero emission reconstruction of wastewater of a power plant, circulating water and sewage are the main water consumption parts of a thermal power plant, and sewage recycling is one of effective ways for relieving water resource crisis and protecting water environment.
Ca in the circulating water sewage2+、SO42-、HCO3-、Ba2+、Sr2+And Si and other scaling ions have high content, and belong to water quality easy to scale. In addition, the content of organic matters in the circulating water sewage is high, and particularly for thermal power plants using urban reclaimed water as a water source, the content of the organic matters in the circulating water is high and the biodegradability is low. Most power plants directly use the circulating water as the water inlet of the reverse osmosis system after coagulation and clarification treatment, but have more problems. At present, lime coagulation, ultrafiltration and reverse osmosis treatment processes are mostly adopted for sewage discharged by circulating cooling water, and the problems mainly manifested as the phenomenon of 'tank turning' of a mechanical accelerated clarification tank, serious ultrafiltration pollution blockage, frequent replacement of a cartridge filter element of a cartridge filter, frequent reverse osmosis cleaning and the like exist in the actual operation process.
Therefore, a recycling treatment system for the circulating water and sewage of the thermal power plant is urgently needed to solve the current problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a recycling treatment system for circulating water and sewage of a thermal power plant, which aims to solve the problems of frequent equipment cleaning and replacement in the existing circulating cooling water and sewage treatment process and reduce the maintenance cost of the system.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows.
A recycling treatment system for thermal power plant circulating water sewage comprises a softener, a catalytic oxidation device, an ultrafiltration device, a reverse osmosis device and an electric desalting device, wherein the softener, the catalytic oxidation device, the ultrafiltration device, the reverse osmosis device and the electric desalting device are sequentially connected through pipelines and are used for collecting the sewage and adjusting the pH value of the sewage; the circulating water sewage enters a reverse osmosis device after being treated by a softener, a catalytic oxidation device and an ultrafiltration device in sequence, and the reverse osmosis device sends concentrated water into an electric desalting device and produces water for a chemical make-up water treatment system of a power plant; the electric desalting device takes electric desalting produced water as circulating water make-up water of a power plant, and discharges desalted concentrated water to be further processed.
Further optimizing the technical scheme, the softener adjusts the pH value of the sewage to 10.0-11.0.
According to the technical scheme, a water pump for pressurizing is arranged on a pipeline between the softener and the catalytic oxidation device.
According to the technical scheme, the catalyst in the catalytic oxidation device is ozone, and a raw water pump used for pressurizing water is arranged on a pipeline between the catalytic oxidation device and the ultrafiltration device.
Further optimizing the technical scheme, an ultrafiltration membrane component for removing crystals and suspended matters is arranged in the ultrafiltration device.
Further optimizing the technical scheme, a fresh chamber, a dense chamber and an electric desalting membrane stack are arranged in the electric desalting device.
Due to the adoption of the technical scheme, the technical progress of the utility model is as follows.
According to the recycling treatment system for the circulating water sewage of the thermal power plant, provided by the utility model, the combination of the softener, the catalytic oxidation device, the ultrafiltration device, the reverse osmosis device and the electric desalting device which are sequentially communicated is utilized to remove impurities such as hardness, chloride ions, organic matters and the like in the circulating water sewage, and the water of the circulating water sewage is reliably recycled. The catalytic oxidation technology is utilized to treat the refractory organic matters with good effect, the refractory organic matters in the circulating water sewage are removed, the reverse osmosis device is prevented from being frequently cleaned, the stable operation of the reverse osmosis device is ensured, and the recycling of reverse osmosis produced water and electric desalting produced water is realized. The utility model has the advantages of good treatment effect, low system maintenance cost and simple operation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
wherein: 1. a softener, 2, a catalytic oxidation device, 3, an ultrafiltration device, 4, a reverse osmosis device, 5 and an electric desalting device.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings.
A recycling treatment system of thermal power plant circulating water sewage is shown by combining a figure 1 and comprises a softener 1, an ultrafiltration device 3, a catalytic oxidation device 2, a reverse osmosis device 4 and an electric desalting device 5.
The softener 1, the catalytic oxidation device 2, the ultrafiltration device 3, the reverse osmosis device 4 and the electric desalting device 5 are connected in sequence through pipelines.
The softener 1 is used for collecting sewage and introducing the sewage into a recycling treatment system, adjusting the pH value of the circulating water sewage of the power plant to 10.0-11.0 to remove the hardness of the circulating water sewage of the power plant, and then delivering the softened water to the catalytic oxidation device 2 through a pipeline. A water pump is arranged on a pipeline between the softener 1 and the catalytic oxidation device 2 and is used for pressurizing water.
The catalytic oxidation device 2 is internally provided with an ozone catalyst for removing organic matters in the circulating water sewage so as to ensure the safe operation of the reverse osmosis device 4. The water after the catalytic oxidation enters the ultrafiltration device 3 through a pipeline; a raw water pump is arranged on a pipeline between the catalytic oxidation device 2 and the ultrafiltration device 3 and is used for pressurizing water.
An ultrafiltration membrane component is arranged in the ultrafiltration device 3 and used for removing suspended matters in the water discharged from the crystallization and catalytic oxidation device 2, separating the raw water and dividing the raw water into produced water and concentrated water. The produced water of the ultrafiltration device 3 enters the reverse osmosis device 4 through a pipeline.
The recovery rate of the reverse osmosis unit 4 was 60%. The produced water of the reverse osmosis device 4 is sent to a chemical make-up water treatment system of a power plant, and concentrated water is sent to an electric desalting device 5 for further treatment. The sewage enters the reverse osmosis device for softening and filtering, organic matters which are difficult to degrade in the circulating water sewage are removed, and the damage of impurities in the circulating water sewage to the reverse osmosis membrane is reduced.
The electric desalting device 5 is internally provided with a fresh chamber and a thick chamber, the fresh chamber is internally provided with a fresh chamber circulating pump, and the thick chamber is internally provided with a thick chamber circulating pump. An electric desalting membrane stack is also arranged in the electric desalting device 5 and provides a direct current electric field to make anions and cations in water migrate and finally separate water into concentrated water and produced water; the produced water is used as a power plant circulating water supplementing water source, and the concentrated water is subjected to further desalting treatment.
The utility model is used for recycling treatment of thermal power plant circulating water sewage:
1) collecting the thermal power plant circulating water sewage to a softener 1, adding NaOH solution or NaOH and Na into the sewage in the softener 12CO3The pH value of the mixed solution is adjusted to be between 10.0 and 11.0, and most of hardness in the circulating water sewage is removed.
2) The water discharged from the softener 1 is pressurized and conveyed to a catalytic oxidation reactor through a water pump, the adding amount of ozone in the catalytic oxidation reactor is adjusted, under the action of the ozone in the reactor, COD in the water is continuously oxidized by the ozone, the COD value is reduced, and partial organic matters are removed.
3) The effluent after catalytic oxidation enters a raw water tank of the ultrafiltration device 3 through a pipeline, enters the ultrafiltration device 3 through the pressurization of a raw water pump, an ultrafiltration membrane component is arranged in the ultrafiltration device 3, the raw water is divided into produced water and concentrated water due to the separation effect of the ultrafiltration membrane component, and the turbidity of the ultrafiltration produced water is controlled to be less than or equal to 1NTU by adopting a micro cross flow filtration mode.
4) And (3) feeding the ultrafiltration produced water into a reverse osmosis device 4, wherein the recovery rate of the reverse osmosis device 4 is 60%, and the reverse osmosis produced water is used for a chemical make-up water treatment system of a thermal power plant.
5) The concentrated water discharged by the reverse osmosis device 4 is pressurized and divided and then respectively enters a dilute chamber and a concentrated chamber of the electric desalting device 5, and the concentrated water is pressurized by a dilute chamber circulating pump and a concentrated chamber circulating pump and then flows through the electric desalting membrane stack. Under the action of direct current electric fields at two ends of the electric desalting membrane stack, anions in the high-salinity water migrate to the positive electrode, cations migrate to the negative electrode, and under the action of an ion exchange membrane, salt in the dilute chamber is continuously collected into the concentrated chamber and is finally separated into concentrated water (concentrated chamber feed liquid) and produced water (dilute chamber feed liquid). The water produced by the electric desalting device 5 is used in a circulating water replenishing system as circulating water replenishing water, and the concentrated water is subjected to further desalting treatment.
Claims (6)
1. The utility model provides a recycling processing system of thermal power plant's circulating water blowdown water which characterized in that: comprises a softener (1) which is used for collecting sewage and adjusting the pH value of the sewage, a catalytic oxidation device (2) which is used for removing organic matters in circulating water sewage, an ultrafiltration device (3) which is used for removing crystals and suspended matters, a reverse osmosis device (4) and an electric desalting device (5) which is used for desalting the sewage, which are connected in sequence through pipelines; the circulating water sewage is treated by a softener (1), a catalytic oxidation device (2) and an ultrafiltration device (3) in sequence and then enters a reverse osmosis device (4), the reverse osmosis device (4) sends concentrated water into an electric desalting device (5), and produced water is sent into a chemical make-up water treatment system of a power plant; the electric desalting device (5) takes the electric desalting produced water as circulating water make-up water of a power plant, discharges the desalted concentrated water and sends the desalted concentrated water to further treatment.
2. The recycling treatment system of thermal power plant circulating water sewage according to claim 1, characterized in that: the softener (1) adjusts the pH value of the sewage to 10.0-11.0.
3. The recycling treatment system of thermal power plant circulating water sewage according to claim 2, characterized in that: a water pump for pressurizing is arranged on a pipeline between the softener (1) and the catalytic oxidation device (2).
4. The recycling treatment system of thermal power plant circulating water sewage according to claim 3, characterized in that: the catalyst in the catalytic oxidation device (2) is ozone, and a raw water pump used for pressurizing water is arranged on a pipeline between the catalytic oxidation device (2) and the ultrafiltration device (3).
5. The recycling treatment system of thermal power plant circulating water sewage according to claim 1, characterized in that: and an ultrafiltration membrane component for removing crystals and suspended matters is arranged in the ultrafiltration device (3).
6. The recycling treatment system of thermal power plant circulating water sewage according to claim 1, characterized in that: the electric desalting device (5) is internally provided with a fresh chamber, a thick chamber and an electric desalting membrane stack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120983711.0U CN215403556U (en) | 2021-05-10 | 2021-05-10 | Recycling treatment system for thermal power plant circulating water sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120983711.0U CN215403556U (en) | 2021-05-10 | 2021-05-10 | Recycling treatment system for thermal power plant circulating water sewage |
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| Publication Number | Publication Date |
|---|---|
| CN215403556U true CN215403556U (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120983711.0U Active CN215403556U (en) | 2021-05-10 | 2021-05-10 | Recycling treatment system for thermal power plant circulating water sewage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115710067A (en) * | 2022-11-23 | 2023-02-24 | 国能朗新明南京环保科技有限公司 | Thermal power plant circulating water cooling pollution discharge resource utilization method |
| CN115849598A (en) * | 2022-11-24 | 2023-03-28 | 浙江浙能技术研究院有限公司 | Recycling system and process method for recycled water source circulating water of thermal power plant |
-
2021
- 2021-05-10 CN CN202120983711.0U patent/CN215403556U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115710067A (en) * | 2022-11-23 | 2023-02-24 | 国能朗新明南京环保科技有限公司 | Thermal power plant circulating water cooling pollution discharge resource utilization method |
| CN115849598A (en) * | 2022-11-24 | 2023-03-28 | 浙江浙能技术研究院有限公司 | Recycling system and process method for recycled water source circulating water of thermal power plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 062550 No. 69, East Industrial Road, Renqiu, Cangzhou City, Hebei Province Patentee after: HEBEI CONSTRUCTION & INVESTMENT GROUP RENQIU THERMOELECTRICITY CO.,LTD. Patentee after: Hebei Jiantou energy science and Technology Research Institute Co., Ltd Address before: 062550 No. 69, East Industrial Road, Renqiu, Cangzhou City, Hebei Province Patentee before: HEBEI CONSTRUCTION & INVESTMENT GROUP RENQIU THERMOELECTRICITY CO.,LTD. Patentee before: Hebei Jiyan energy science and Technology Research Institute Co., Ltd |
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| CP01 | Change in the name or title of a patent holder |