CN111847588A - Efficient energy-saving operation method of reverse osmosis system of advanced treatment part in sewage treatment system - Google Patents
Efficient energy-saving operation method of reverse osmosis system of advanced treatment part in sewage treatment system Download PDFInfo
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- CN111847588A CN111847588A CN202010594895.1A CN202010594895A CN111847588A CN 111847588 A CN111847588 A CN 111847588A CN 202010594895 A CN202010594895 A CN 202010594895A CN 111847588 A CN111847588 A CN 111847588A
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- reverse osmosis
- pressure pump
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- sewage treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a high-efficiency energy-saving operation method of a reverse osmosis system of an advanced treatment part in a sewage treatment system, which comprises the steps of changing the operation frequency of a high-pressure pump in the reverse osmosis system from 30Hz to 34Hz, changing 6 running high-pressure pumps to 5 running high-pressure pumps, stopping one scale inhibitor medicine pump and stopping one high-pressure pump lift pump. The method can effectively save energy, reduce the water production cost of an advanced treatment system in the sewage treatment system and reduce the labor intensity of post workers.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a high-efficiency energy-saving operation method of a reverse osmosis system of an advanced treatment part in a sewage treatment system.
Background
Reverse osmosis is a membrane separation operation that uses a pressure differential as a driving force to separate a solvent from a solution. Applying pressure to the feed solution on one side of the membrane, and when the pressure exceeds the osmotic pressure thereof, the solvent will permeate in the opposite direction against the natural permeation direction, so as to obtain a permeated solvent, namely a permeate, on the low pressure side of the membrane; the high pressure side yields a concentrated solution, i.e., a concentrate. Therefore, the reverse osmosis needs enough pressure during operation, the pressure is provided by a high-pressure pump, as shown in fig. 1, a first-stage reverse osmosis system in the prior art is shown, 6 first-stage high-pressure pumps are operated at the frequency of 30Hz, 4 first-stage high-pressure pump lift pumps and 6 antisludging agent medicine pumps are operated at the same time, the water yield and the water quality (namely the water yield conductance) of a first-stage reverse osmosis rack (total 6) are ensured, and the water is sent to a user after the treatment of the desalted water and the filtered water.
Although the current operation mode can ensure the quality and yield of the produced water, in order to further save energy, reduce the water production cost of an advanced treatment system in a sewage treatment system and reduce the labor intensity of post workers, a more economic and efficient operation mode still needs to be explored.
Disclosure of Invention
Aiming at one or more problems in the prior art, the invention provides a high-efficiency energy-saving operation method of a deep treatment part reverse osmosis system in a sewage treatment system, which comprises the steps of changing the operation frequency of a high-pressure pump in the reverse osmosis system from 30Hz to 34Hz, changing 6 running high-pressure pumps to 5 running high-pressure pumps, changing 4 running high-pressure pump lift pumps to 3 running high-pressure pump lift pumps, and changing 6 running scale inhibitor medicine pumps to 5 running scale inhibitor medicine pumps.
The reverse osmosis system is a first-stage reverse osmosis system, and the high-pressure pump is a first-stage high-pressure pump.
According to the efficient energy-saving operation method of the reverse osmosis system of the advanced treatment part in the sewage treatment system, by increasing the operation frequency of the primary high-pressure pump (6 high-pressure pumps operated at 30Hz are changed into 5 high-pressure pumps operated at 34 Hz), stopping operating the lifting pump of the high-pressure pump and stopping operating the scale inhibitor medicine pump, energy can be further saved, the water production cost of the advanced treatment system in the sewage treatment system can be reduced, and the labor intensity of post workers can be reduced under the condition of ensuring the water yield and the water quality.
Drawings
FIG. 1 is a schematic flow diagram of a primary reverse osmosis system.
Detailed Description
The invention aims to provide an efficient energy-saving operation method of a reverse osmosis system of an advanced treatment part in a sewage treatment system, so as to further save energy, reduce the water production cost of the advanced treatment system in the sewage treatment system and reduce the labor intensity of post workers.
The contents of the present invention are further illustrated in the following examples using a first stage reverse osmosis system as an example. These examples are only for the purpose of better understanding of the present invention and do not limit the content of the present invention in any way.
Example 1:
in this example, a method provided by the present invention was used during periods 2019.3.1 to 2019.5.17 to operate a deep treatment partial reverse osmosis system in a sewage treatment system according to the flow of fig. 1, wherein the operation frequency of the first-stage high-pressure pump was 34Hz, 5 pumps were operated, 3 high-pressure pump lift pumps were operated, 5 scale inhibitor pumps were operated, and the water yield and water quality (water yield conductance) of each first-stage reverse osmosis rack (total 5 pumps) were measured, and the results are shown in table 1 below.
Comparative example 1:
in the comparative example, a deep treatment partial reverse osmosis system in a sewage treatment system is operated by a method in the prior art during 2019.3.1-2019.5.17 according to the flow of fig. 1, wherein the operation frequency of a first-stage high-pressure pump is 30Hz, 6 high-pressure pumps are operated, 4 high-pressure pump lift pumps are operated simultaneously, 6 antisludging agent medicine pumps are operated, and the water yield and the water quality (water yield conductance) of each first-stage reverse osmosis rack (total 6 high-pressure pump lift pumps) are measured, and the results are shown in table 1 below.
Table 1: water production and conductance of Water production for each of the stands of example 1 and comparative example 1
As can be seen from Table 1, when the operating frequency of the high-pressure pump was increased from 30Hz to 34Hz, the water production of each rack was increased, and the water production of 5 racks was increased by 133m3H (corresponding to the water yield of one stand when the high-pressure pump is operated at a frequency of 30 Hz), and the average conductance of the produced water is reduced by 7us/cm compared with that before. This corresponds to a high pressure pump operating frequency of 34Hz, and the water production of 5 stands is equivalent to the water production of 6 stands when the high pressure pump operating frequency is 30 Hz. Therefore, one first-stage high-pressure pump lifting pump for supplying water to the high-pressure pump and one scale inhibitor medicine pump can be stopped, and the quality of the obtained desalted water is obviously improved.
Table 2 below shows the electricity consumption 5 months before 2019, in which the method for operating the advanced treatment part reverse osmosis system in the sewage treatment system provided by the present invention with high efficiency and energy saving is adopted from 3 months and 1 day before 2019.
Table 2: electricity consumption 5 months before 2019
| Month of the year | 1 month | 2 month | 3 month | 4 month | Month 5 |
| Electricity consumption (degree/ton) | 1.1699 | 1.1837 | 1.0525 | 0.9428 | 1.0038 |
As can be seen from the above table 2, the electricity consumption in 3, 4 and 5 months is significantly reduced compared with that in 1-2 months, and the labor intensity of post workers can be obviously reduced after the operation mode is changed: the method comprises the steps of reducing the start and stop of one rack every day (the operation steps of starting and stopping each rack are 1, a high-pressure pump lifting pump jigger, 2, the high-pressure pump jigger, 3, checking a corresponding dosing system, 4, deflating a corresponding security filter, 5, checking and adjusting a rack valve, 6, adjusting parameters after starting the rack and checking whether the rack runs normally, and 7, stopping the rack), and reducing the start and stop of one high-pressure pump lifting pump and one scale inhibitor medicine pump.
And (3) saving cost calculation:
the actual electricity saving amount of 4 months and 1 day to 5 months and 31 days is taken as an example for calculation (calculated according to the electricity unit consumption):
(1) the average electricity unit consumption in 1-2 months is: 1.1768kWh/t
(2) The electricity unit consumption in the month of 4 is reduced compared with that in the month of 1-2: 0.243 kWh/t; the electricity unit consumption in 5 months is reduced compared with that in 1-2 months: 0.173 kWh/t;
(3) the electric quantity saved in the two months can be calculated according to the water supply amount in the months of 4 and 5 as follows:
790002 0.243+638560 0.173-191970 + 110470-302440 kWh, in terms of electricity charge: 302440kWh 0.37 kWh/min 111903 min
(4) According to delivery rate of 1000m per hour3The outgoing conductivity is 1000us/cm, the incoming water conductivity is 2000us/cm, the total water conductivity is 80.42us/cm before frequency extraction, and the total water conductivity is 73.42us/cm after frequency extraction (in the operation method, the lower the water conductivity and the lower the used amount of the desalted water), and the desalted water is saved by 1.94 m/hour3The cost is saved by 2.8 yuan, and the cost can be saved by 47584.32 yuan in one year.
(5) The annual cost saving is expected according to the data: 111903 x 6+47584 x 719002.
In conclusion, the efficient energy-saving operation method of the reverse osmosis system of the advanced treatment part in the sewage treatment system provided by the invention can ensure the water yield and the water quality, further save energy, reduce the water production cost of the advanced treatment system in the sewage treatment system and the labor intensity of workers at posts, and has wide application prospect.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A high-efficiency energy-saving operation method for a reverse osmosis system of a deep treatment part in a sewage treatment system comprises the steps of changing the operation frequency of a high-pressure pump in the reverse osmosis system from 30Hz to 34Hz, changing 6 high-pressure pumps in operation to 5 high-pressure pumps in operation, changing 4 high-pressure pump lift pumps in operation to 3 high-pressure pump lift pumps in operation, and changing 6 scale inhibitor medicine pumps in operation to 5 scale inhibitor medicine pumps in operation.
2. The method of claim 1, wherein the reverse osmosis system is a primary reverse osmosis system and the high pressure pump is a primary high pressure pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010594895.1A CN111847588A (en) | 2020-06-28 | 2020-06-28 | Efficient energy-saving operation method of reverse osmosis system of advanced treatment part in sewage treatment system |
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| CN202010594895.1A CN111847588A (en) | 2020-06-28 | 2020-06-28 | Efficient energy-saving operation method of reverse osmosis system of advanced treatment part in sewage treatment system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203373223U (en) * | 2013-07-15 | 2014-01-01 | 浙江斯科能科技股份有限公司 | Water treatment device of seawater desalination system |
| CN103601310A (en) * | 2013-07-15 | 2014-02-26 | 浙江斯科能科技股份有限公司 | Water processing method and device thereof of seawater desalination system |
| CN104150649A (en) * | 2014-07-31 | 2014-11-19 | 山东省环能设计院有限公司 | Boiler make-up water treatment system and treatment method in power station |
| CN207451686U (en) * | 2017-09-29 | 2018-06-05 | 楚雄滇中有色金属有限责任公司 | A kind of raising film producing water ratio processing system |
-
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- 2020-06-28 CN CN202010594895.1A patent/CN111847588A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203373223U (en) * | 2013-07-15 | 2014-01-01 | 浙江斯科能科技股份有限公司 | Water treatment device of seawater desalination system |
| CN103601310A (en) * | 2013-07-15 | 2014-02-26 | 浙江斯科能科技股份有限公司 | Water processing method and device thereof of seawater desalination system |
| CN104150649A (en) * | 2014-07-31 | 2014-11-19 | 山东省环能设计院有限公司 | Boiler make-up water treatment system and treatment method in power station |
| CN207451686U (en) * | 2017-09-29 | 2018-06-05 | 楚雄滇中有色金属有限责任公司 | A kind of raising film producing water ratio processing system |
Non-Patent Citations (1)
| Title |
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| 陈明等: "智能光伏海水淡化系统的研究与开发", 《太阳能学报》 * |
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