CN210419609U - System for preparing boiler demineralized water by utilizing circulating water - Google Patents
System for preparing boiler demineralized water by utilizing circulating water Download PDFInfo
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- CN210419609U CN210419609U CN201921222803.6U CN201921222803U CN210419609U CN 210419609 U CN210419609 U CN 210419609U CN 201921222803 U CN201921222803 U CN 201921222803U CN 210419609 U CN210419609 U CN 210419609U
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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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Abstract
The utility model provides a system for utilize circulating water to prepare boiler demineralized water, including water source, heater, reverse osmosis system, ion exchanger and demineralized water tank, wherein, the entry of heater is connected to the export of water source, the entry of reverse osmosis system is connected to the export of heater, the entry of demineralized water tank is connected through ion exchanger to the export of reverse osmosis system; a circulating water system for adjusting the temperature of water entering the reverse osmosis system is arranged on a connecting pipeline between the outlet of the heater and the inlet of the reverse osmosis system; the utility model discloses the waste heat of make full use of circulating water reduces the steam quantity of heater, especially in the chilly season of weather, and the effect is practiced thrift to the steam quantity is more obvious.
Description
Technical Field
The utility model relates to a water treatment field of thermal power plant, concretely relates to utilize circulating water to prepare system of boiler demineralized water.
Background
In recent years, the power generation industry is on the whole in an ascending trend, wind power is rapidly developed, but the share of thermal power generation is reduced year after year, and the policy of 'increasing large pressure and decreasing small pressure' makes a batch of small and medium-sized units stop continuously, the power generation capacity of a large-sized unit is reduced sharply, and part of power plant operation is difficult. Under the background, power plants begin to exploit peripheral markets to increase steam and heat supply. The steam supply mode of the power plant generally supplies steam to users through pipelines, and condensed water is not recycled, so that when the steam supply quantity is increased, the water supplement quantity of a chemical plant of a boiler is increased.
The flow of boiler water supply (demineralized water preparation) is generally raw water → a raw water heater (steam heating) → a raw water tank → a multi-media filter → a cartridge filter (or an activated carbon filter) → reverse osmosis desalination → a carbon remover → an intermediate water tank → ion exchange. If the water source is canal water or reclaimed water, pretreatment processes such as flocculation, filtration, precipitation and the like are needed before entering the raw water tank, and indexes such as turbidity, COD and the like of the water are reduced. The optimum feed water temperature for the reverse osmosis system is 25 ℃, and raw water is heated to 25 ℃ by a raw water heater. The heat source used by the raw water heater is steam which is self-supplied by a steam turbine of a power plant. When the environmental temperature is lower, the raw water heater needs to use more steam to heat the feed water, especially when the steam supply of the unit is larger, the usage amount of the steam is very large, and the economic benefit of the power plant is affected (the price of the steam is generally 160 and 220 yuan/ton according to different regions). Therefore, it is very practical to find a method for producing desalted water by saving heating steam, and the saved steam can bring more economic benefits to the power plant.
Disclosure of Invention
An object of the utility model is to provide an utilize system of boiler demineralized water is prepared to circulating water, it needs a large amount of heating steam to have solved the boiler moisturizing flow among the steam supply system of current power plant, leads to the cost too high.
In order to achieve the above purpose, the utility model discloses a technical scheme is:
the utility model provides a system for utilize circulating water to prepare boiler demineralized water, including water source, heater, reverse osmosis system, ion exchanger and demineralized water tank, wherein, the entry of heater is connected to the export of water source, the entry of reverse osmosis system is connected to the export of heater, the entry of demineralized water tank is connected through ion exchanger to the export of reverse osmosis system;
a circulating water system for adjusting the temperature of water entering the reverse osmosis system is arranged on a connecting pipeline between the outlet of the heater and the inlet of the reverse osmosis system.
Preferably, a first temperature sensor and a first electric flow regulating valve are sequentially arranged on a connecting channel between the water source and the heater.
Preferably, a second temperature sensor is provided at an outlet of the heater.
Preferably, a third temperature sensor is provided at the inlet of the reverse osmosis system.
Preferably, the circulating water system comprises a water cooling tower, a circulating water outlet is arranged on a circulating water return pipeline on the water cooling tower, and the circulating water outlet is connected with a connecting pipeline between an outlet of the heater and an inlet of the reverse osmosis system.
Preferably, a fourth temperature sensor and a second electric flow regulating valve are sequentially arranged on the circulating backwater outlet pipeline.
Preferably, a water taking pump is further arranged on the circulating water return outlet pipeline.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a system for preparing boiler demineralized water by utilizing circulating water, which adds a circulating water system in the existing chemical water system, prepares the demineralized water by utilizing the circulating water, fully utilizes the temperature of the circulating water and achieves the aim of saving the consumption of the demineralized water heating steam in winter; the utility model makes full use of the waste heat of the circulating water, reduces the steam consumption of the heater, and has more obvious steam consumption saving effect especially in cold seasons; the equipment is used to the maximum extent, and the filter, the reverse osmosis membrane and the like in the original system are utilized to treat the circulating water to ensure that the circulating water reaches the standard of demineralized water, so that the investment cost ratio is extremely high; the utility model discloses can save a large amount of heater steam quantity when water source temperature is lower, have that waste heat utilization is high, equipment is good at old rate height, investment recovery period is short, working costs low grade advantage.
Furthermore, the water taking point of the circulating water is arranged on the circulating water return pipeline, and the reason for selecting the circulating water return pipeline is that the temperature of the circulating water is highest, the waste heat can be utilized to the maximum degree, and the steam using amount of the heater is reduced.
Drawings
Fig. 1 is a schematic diagram of the system according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in FIG. 1, the utility model provides a system for preparing boiler demineralized water by using circulating water, which comprises a water source 1, a first temperature sensor 2, a first electric flow control valve 3, a heater 4, a second temperature sensor 5, a pretreatment 6, a multi-media filter 7, a third temperature sensor 8, a reverse osmosis system 9, an ion exchanger 10, a demineralized water tank 11, a water cooling tower 12, a fourth temperature sensor 13, a water intake pump 14 and a first electric flow control valve 15, wherein, an outlet of the water source 1 is connected with an inlet of the heater 4, an outlet of the heater 4 is connected with an inlet of the pretreatment 6, an outlet of the pretreatment 6 is connected with an inlet of the multi-media filter 7, an outlet of the multi-media filter 7 is connected with an inlet of the reverse osmosis system 9, an outlet of the reverse osmosis system 9 is connected with an inlet of the ion exchanger 10, an outlet of the ion exchanger 10 is connected with an inlet of, an outlet of the demineralized water tank 11 is connected to an inlet of the boiler.
A circulating water system for adjusting the temperature of water entering the multi-media filter 7 is arranged on a connecting channel between the pretreatment 6 and the multi-media filter 7.
The circulating water system comprises a water cooling tower 12, a circulating water outlet is arranged on a circulating water return pipeline on the water cooling tower 12, and the circulating water outlet is connected with a connecting channel between the pretreatment 6 and the multi-media filter 7.
A first temperature sensor 2 and a first electric flow regulating valve 3 are sequentially arranged on a connecting channel between the water source 1 and the heater 4.
A second temperature sensor 5 is provided between the heater 4 and the pre-treatment 6.
A third temperature sensor 8 is arranged on the connecting pipeline between the multimedia filter 7 and the reverse osmosis system 9.
And a fourth temperature sensor 13, a water taking pump 14 and a second electric flow regulating valve 15 are sequentially arranged on a connecting pipeline between the circulating water return pipeline and the multi-medium filter 7.
The utility model discloses a theory of operation is:
the utility model provides an utilize circulating water to prepare technical scheme of boiler demineralized water newly increases water pump, electric flow control valve, temperature sensor in original chemical water system to and corresponding valve and pipeline.
The utility model discloses a nuclear core point uses the circulating water to prepare the demineralized water, and the purpose of saving demineralized water heating steam consumption in winter is reached to the temperature of make full use of circulating water.
Specifically, the method comprises the following steps: the flow rates of the water source and the circulating water return are adjusted according to the temperature of the water source and the circulating water return so as to achieve the optimal water inlet temperature of the reverse osmosis system, namely the optimal temperature of 25 ℃.
The reason for this is that the water temperature of the circulating water return pipeline is the highest, which can utilize the waste heat to the maximum extent and reduce the steam consumption of the heater.
The circulating water is pumped into a demineralized water making system by a water pump, and is pumped into a point selection device after a heater and pretreatment and before a fine filter (generally a multi-medium or activated carbon filter), and the reason is that the circulating water is concentrated (the concentration ratio is generally 2-5), the indexes such as hardness, salt content, COD (chemical oxygen demand) and the like are increased sharply, and the circulating water must be filtered by the fine filter, otherwise, the circulating water can cause adverse effects on a reverse osmosis membrane, and the service life of the membrane is shortened.
The utility model discloses a work flow is:
when the temperature of the water at the outlet of the water source 1 is higher than 25 ℃, the system does not need to be started, because the water temperature of the water source reaches the reverse osmosis water inlet requirement, the heater 4 does not need to be used, and the steam is not consumed.
When the temperature of the water at the outlet of the water source 1 is lower than 25 ℃ and the temperature of the circulating water at the water cooling tower 12 is higher than 25 ℃, the water taking pump 13 is opened, and the circulating water with higher temperature is extracted from the circulating water system; according to the water temperatures of the water source and the circulating water, the water amounts of the water source 1 and the water intake of the circulating water system are respectively adjusted through the first electric flow regulating valve 3 and the second electric flow regulating valve 15, so that the mixed temperature is 25 ℃, the heater 4 still does not need to be used, and steam is not consumed.
When the temperature of the water at the outlet of the water source 1 and the temperature of the circulating water are both lower than 25 ℃, the heater 4 is started, and the water intake quantity of the circulating water system is adjusted through the second electric flow regulating valve 15 according to the water temperature and the circulating water temperature heated by the heater 4, so that the mixed water temperature is 25 ℃, and part of steam is consumed.
When the circulation multiplying power is increased, the quality of the circulating water is deteriorated, and the dosage of acid and scale inhibitor in front of the reverse osmosis system needs to be adjusted in time according to the monitoring condition of the quality of the circulating water, so that the reverse osmosis membrane component is prevented from being polluted.
Compared with the prior demineralized water treatment technology, the utility model has the advantages that:
1. the waste heat of make full use of circulating water reduces the steam quantity of heater, and especially in the cold season of weather, the steam quantity saving effect is more obvious.
2. The maximum equipment is good for use, and the filter, reverse osmosis membrane and the like in the original system are used for treating the circulating water to make the circulating water reach the standard of demineralized water, so that the investment cost ratio is extremely high.
The circulation multiplying power can be reduced by taking water from the circulating water system, the adverse effects of the circulating water on equipment such as corrosion and the like are reduced, and the effects of protecting the equipment and prolonging the overhaul period of the equipment are achieved.
The utility model provides a method and system for utilizing high temperature circulating water to prepare boiler demineralized water can save a large amount of heater steam quantity when water source temperature is lower, have waste heat utilization rate height, equipment advantage such as the rate of old and useless height, investment recovery phase weak point, working costs low.
Claims (7)
1. A system for preparing boiler desalted water by using circulating water is characterized by comprising a water source (1), a heater (4), a reverse osmosis system (9), an ion exchanger (10) and a desalted water tank (11), wherein an outlet of the water source (1) is connected with an inlet of the heater (4), an outlet of the heater (4) is connected with an inlet of the reverse osmosis system (9), and an outlet of the reverse osmosis system (9) is connected with an inlet of the desalted water tank (11) through the ion exchanger (10);
a circulating water system for adjusting the temperature of water entering the reverse osmosis system (9) is arranged on a connecting pipeline between the outlet of the heater (4) and the inlet of the reverse osmosis system (9).
2. The system for preparing boiler desalted water by using circulating water according to claim 1, wherein the first temperature sensor (2) and the first electric flow regulating valve (3) are sequentially arranged on the connecting channel between the water source (1) and the heater (4).
3. A system for preparing boiler demineralized water with circulating water according to claim 1, characterized in that the outlet of the heater (4) is provided with a second temperature sensor (5).
4. A system for preparing boiler desalinated water by using circulating water according to claim 1, wherein a third temperature sensor (8) is provided at an inlet of the reverse osmosis system (9).
5. The system for preparing boiler desalted water by using circulating water according to claim 1, wherein the circulating water system comprises a water cooling tower (12), a circulating water outlet is arranged on a circulating water return pipeline on the water cooling tower (12), and the circulating water outlet is connected with a connecting pipeline between an outlet of the heater (4) and an inlet of the reverse osmosis system (9).
6. The system for preparing boiler desalted water by using circulating water according to claim 5, wherein a fourth temperature sensor (13) and a second electric flow regulating valve (15) are sequentially arranged on the circulating water return water outlet pipeline.
7. The system for preparing boiler desalted water by using circulating water as claimed in claim 5, wherein said circulating water return water outlet pipeline is further provided with a water taking pump (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921222803.6U CN210419609U (en) | 2019-07-30 | 2019-07-30 | System for preparing boiler demineralized water by utilizing circulating water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921222803.6U CN210419609U (en) | 2019-07-30 | 2019-07-30 | System for preparing boiler demineralized water by utilizing circulating water |
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| CN210419609U true CN210419609U (en) | 2020-04-28 |
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| CN201921222803.6U Active CN210419609U (en) | 2019-07-30 | 2019-07-30 | System for preparing boiler demineralized water by utilizing circulating water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110282809A (en) * | 2019-07-30 | 2019-09-27 | 中国华能集团清洁能源技术研究院有限公司 | A kind of system and method for producing boiler demineralized water using recirculated water |
| CN115594337A (en) * | 2022-09-30 | 2023-01-13 | 乌海宝化万辰煤化工有限责任公司（Cn） | Sewage recycling treatment system |
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2019
- 2019-07-30 CN CN201921222803.6U patent/CN210419609U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110282809A (en) * | 2019-07-30 | 2019-09-27 | 中国华能集团清洁能源技术研究院有限公司 | A kind of system and method for producing boiler demineralized water using recirculated water |
| CN115594337A (en) * | 2022-09-30 | 2023-01-13 | 乌海宝化万辰煤化工有限责任公司（Cn） | Sewage recycling treatment system |
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