CN112744947A - Purified DCS (distributed control system) of pure water for hydrogen peroxide process - Google Patents

Purified DCS (distributed control system) of pure water for hydrogen peroxide process Download PDF

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Publication number
CN112744947A
CN112744947A CN202011436546.3A CN202011436546A CN112744947A CN 112744947 A CN112744947 A CN 112744947A CN 202011436546 A CN202011436546 A CN 202011436546A CN 112744947 A CN112744947 A CN 112744947A
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CN
China
Prior art keywords
valve
ultrafiltration
discharge valve
pump
raw water
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Pending
Application number
CN202011436546.3A
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Chinese (zh)
Inventor
赵金刚
夏文俊
李仁昌
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Anhui Jinhe Industrial Co Ltd
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Anhui Jinhe Industrial Co Ltd
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Priority to CN202011436546.3A priority Critical patent/CN112744947A/en
Publication of CN112744947A publication Critical patent/CN112744947A/en
Pending legal-status Critical Current

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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • 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
    • 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
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • 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
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a purified DCS control system of pure water for a hydrogen peroxide process, which comprises a raw water tank, wherein the outlet of the raw water tank is sequentially connected with a raw water pump, a raw water valve, an activated carbon filter, an ultrafiltration water inlet valve, an ultrafiltration filter, an ultrafiltration membrane component, a back flush valve, a back flush pump, an ultrafiltration water tank and a reverse osmosis membrane component; a first positive discharge valve used as a bypass is also arranged between the activated carbon filter and the ultrafiltration water inlet valve; the ultrafiltration membrane component is also respectively connected with a second positive discharge valve and a reverse discharge valve, and the outlets of the first positive discharge valve, the second positive discharge valve and the reverse discharge valve are all connected to a transfer water station; the transfer water station is connected with a transfer pump through a transfer valve to form a raw water tank; the reverse osmosis membrane group is also connected with a scale inhibitor dosing device; the control system further comprises a DCS; the system can improve the purification effect, can run fully automatically, reduces errors caused by manual operation, and reduces the maintenance cost.

Description

Purified DCS (distributed control system) of pure water for hydrogen peroxide process
Technical Field
The invention relates to the technical field of chemical water purification treatment, in particular to a DCS (distributed control system) for purifying pure water for a hydrogen peroxide process.
Background
In the hydrogen peroxide process, the water source of the pure water is river water, and the river water needs to be purified to meet the water quality requirement of the pure water. The pure water purification at the present stage generally comprises devices such as pre-filtration, backwashing, forward washing, medicine injection, desalination and the like; the prior pure water purification is generally operated manually, but because the water source is river water, algae and microorganisms in the water are more, the pH value is alkalescent, the water is influenced by upstream pollution discharge, the water quality is unstable, and the water changes along with the rainy season, the manual operation can hardly meet the accurate requirement.
Disclosure of Invention
The invention aims to provide a DCS control system for purifying pure water for a hydrogen peroxide process, which can improve the purification effect, can fully automatically operate, reduce errors caused by manual operation and reduce the maintenance cost.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a DCS control system for purifying pure water for a hydrogen peroxide process comprises a raw water tank, wherein the outlet of the raw water tank is sequentially connected with a raw water pump, a raw water valve, an activated carbon filter, an ultrafiltration water inlet valve, an ultrafiltration filter, an ultrafiltration membrane component, a back flush valve, a back flush pump, an ultrafiltration water tank and a reverse osmosis membrane component; a booster pump and a high-pressure pump are sequentially connected between the ultrafiltration water tank and the reverse osmosis membrane group; a first positive discharge valve used as a bypass is also arranged between the activated carbon filter and the ultrafiltration water inlet valve; the ultrafiltration membrane component is also respectively connected with a second positive discharge valve and a reverse discharge valve, and the outlets of the first positive discharge valve, the second positive discharge valve and the reverse discharge valve are all connected to a transfer water station; the transfer water station is connected with a transfer pump through a transfer valve to form a raw water tank; the reverse osmosis membrane group is also connected with a scale inhibitor dosing device; the control system further comprises a DCS, and the DCS is respectively connected with the raw water pump, the raw water valve, the ultrafiltration water inlet valve, the backwashing pump, the booster pump, the high-pressure pump, the first positive discharge valve, the second positive discharge valve, the reverse discharge valve, the transfer valve and the transfer pump.
The invention has the advantages that the raw water tank is used for storing river water to be purified, the activated carbon filter is used for adsorbing organic matters in the water, the ultrafiltration filter and the ultrafiltration membrane component play a role in strengthening filtration, the backwashing pump meets backwashing requirements, the reverse osmosis membrane group is combined with the scale inhibitor dosing device to achieve the aim of desalting, the whole process is completed by adopting DCS control, the purification effect can be improved, the full-automatic operation can be realized, errors caused by manual operation are reduced, and the maintenance cost is reduced.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
As shown in fig. 1, the invention provides a DCS control system for purifying pure water for a hydrogen peroxide process, which comprises a raw water tank 1, wherein an outlet of the raw water tank is sequentially connected with a raw water pump 2, a raw water valve 3, an activated carbon filter 4, an ultrafiltration water inlet valve 5, an ultrafiltration filter 6, an ultrafiltration membrane component 7, a backwash valve 8, a backwash pump 9, an ultrafiltration water tank 10 and a reverse osmosis membrane group 11; a booster pump 12 and a high-pressure pump 13 are sequentially connected between the ultrafiltration water tank 10 and the reverse osmosis membrane group 11; a first positive discharge valve 14 serving as a bypass is also arranged between the activated carbon filter and the ultrafiltration water inlet valve; the ultrafiltration membrane component is also respectively connected with a second positive discharge valve 15 and a reverse discharge valve 16, and the outlets of the first positive discharge valve 14, the second positive discharge valve 15 and the reverse discharge valve 16 are all connected to a transfer water station 17; the transfer water station is connected with a transfer pump 19 through a transfer valve 18 to form a raw water tank; the reverse osmosis membrane group is also connected with a scale inhibitor dosing device 20; the control system further comprises DCS21, wherein the DCS21 is respectively connected with the raw water pump, the raw water valve, the ultrafiltration water inlet valve, the backwashing pump, the booster pump, the high-pressure pump, the first positive discharge valve, the second positive discharge valve, the backwashing valve, the transfer valve and the transfer pump.
Because the raw water is river water, the demineralized water system requires that the water inlet pressure is not less than 0.3MPa, and the pressure and the flow are constant, a raw water tank is arranged in the system and is used for water inlet of the demineralized water system after being pressurized by a raw water pump. The raw water tank is used for storing raw water, has the functions of storing and regulating water quantity in the process, and has the effective volume of 100m3。
The raw water pump is used for lifting raw water, and the raw water enters the activated carbon filter 4 after being lifted, so that the stable water inlet pressure and flow rate for desalting are ensured.
The back washing pump is used for providing power for the back washing of the active carbon filter 4 and ensuring the back washing flow.
The activated carbon filter is mainly used for adsorbing organic matters, residual chlorine, chromaticity, partial heavy metal ions and partial unreduced active chlorine after chlorination in water, and preventing a reverse osmosis membrane element from being polluted by the organic matters and preventing the residual chlorine from destructively oxidizing the membrane element. The fruit-shell type activated carbon is arranged in the activated carbon filter, the backwashing strength is 8-10L/m because the specific weight of the activated carbon is lighter, the backwashing expansion rate of the filter materials is 80%, and low-flow-rate backwashing is preferably selected during backwashing so as to prevent the activated carbon from being washed away by backwashing water.
According to the calculation of the reverse osmosis process, the LSI (Langeri index) on the reverse osmosis concentrated water side is 1.8 and is more than 0, the concentrated water side is subjected to scaling phenomenon, a scale inhibitor feeding device 20 is arranged in front of a reverse osmosis membrane group, a composite scale inhibitor at the MDCD220 inlet is added, and the LSI on the concentrated water side is not subjected to scaling phenomenon under the condition of 3.0 after the scale inhibitor is added.
The scale inhibitor is of a resin-shaped molecular structure, does not contain any phosphorus component (microbial membrane swelling of membrane elements does not exist when the dosage is excessive, and the scale inhibitor has applicability and safety when being added compared with other scale inhibitors), has super-strong scale inhibition property and stability, can not be self-adhered, has no influence on the membrane elements when the dosage is excessive, can effectively prevent various metal salt scales and colloidal scales, is suitable for raw water with COD exceeding the standard, and also has a strong inhibiting effect on organic matter pollution of reverse osmosis membranes when the COD in the raw water is less than 30 PPm.
The dosage of the scale inhibitor MDC220 is 3.0 PPm.
Adding scale inhibitor MDC220, allowing LSI of concentrated water measurement to be 3.0 after adding the scale inhibitor, and simultaneously preventing the scaling of sulfates of heavy metals such as iron, strontium, barium and the like.
After the scale inhibitor is added, the scale inhibition capacity can reach the following standard:
LSI can be increased from a negative value to 3.0
The saturation index of CaSO4 can reach 3.5 times
The saturation index of BaSO4 can reach 75 times
The saturation index of SrSO4 can reach 12 times
The saturation index of CaF2 can reach 100 times
The saturation index of SiO2 can reach 2SCR
The total iron ion saturation concentration can reach 4 mg/L.
The ultrafiltration filter 6 and the ultrafiltration membrane module 7 form an ultrafiltration system, and the ultrafiltration system is a hollow fiber ultrafiltration membrane module which is selected from Purotec UF1060 imported from Korea, has the water yield of 3.0 tons per membrane and has the average molecular weight cutoff of 100,000 daltons. A 10 inch (225 mm) diameter UF1060 module contained approximately 10,000 hollow filaments with an inner diameter of 1.0mm, which was chemically PVC, a hydrophilic material resistant to organic contamination. The filtration is from the inside to the outside, i.e. the raw water flows inside the hollow filaments, while the filtrate passes radially outwards through the hollow filaments. The chemical cleaning device is characterized in that the chemical cleaning device comprises a chemical cleaning device, a chemical feeding device and a chemical cleaning device, wherein the chemical feeding device comprises a chemical feeding device, a chemical cleaning device and a chemical cleaning device.
The backwashing pump meets the requirements of conventional backwashing and reinforced backwashing, backwashing water is taken from the ultrafiltration water tank, the flow and the lift of the backwashing pump meet the backwashing requirements of a single ultrafiltration device, and the interval duration of backwashing can be controlled or changed by DCS (distributed control system).
The reverse osmosis membrane group 11 mainly has a desalting function in the process, and is used for removing most of anions, cations, organic matters, heat sources, bacteria and the like in water, so that the purity of the effluent is ensured. The high-pressure pump is matched with a reverse osmosis device for use, and a reverse osmosis system is mainly pressurized in the process so as to overcome the osmotic pressure of a membrane element. The reverse osmosis uses a low-pressure BW30-365 aromatic polyamide membrane element produced by the American DOW company, belongs to an energy-saving low-pressure membrane, is an advanced roll type RO membrane element in the world, and has the advantages of compact structure, extremely large water yield (the water yield of a single membrane element can reach 1.0 t/h), high desalination rate (the test data of the single membrane is more than 99 percent), low operating pressure, good bacterial erosion resistance and wide applicable PH range (PH is 2-11). The matched membrane shell is a Pengyu R8040C 30S-5W (B) glass fiber reinforced plastic pressure container which is suitable for BW30-365 membrane element 6 support.
The water transfer station 17 mainly has the functions of adjusting and storing water quantity in the process, and returns water discharged in the ultrafiltration process to the original water tank for recycling.
The purified water enters a pure water tank 22 through a pure water valve 21 to be stored as the hydrogen peroxide process water. The whole purification process is completed through DCS control.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention.

Claims (1)

1. A DCS control system for purifying pure water for a hydrogen peroxide process is characterized by comprising a raw water tank, wherein the outlet of the raw water tank is sequentially connected with a raw water pump, a raw water valve, an activated carbon filter, an ultrafiltration water inlet valve, an ultrafiltration filter, an ultrafiltration membrane component, a back flush valve, a back flush pump, an ultrafiltration water tank and a reverse osmosis membrane group; a booster pump and a high-pressure pump are sequentially connected between the ultrafiltration water tank and the reverse osmosis membrane group; a first positive discharge valve used as a bypass is also arranged between the activated carbon filter and the ultrafiltration water inlet valve; the ultrafiltration membrane component is also respectively connected with a second positive discharge valve and a reverse discharge valve, and the outlets of the first positive discharge valve, the second positive discharge valve and the reverse discharge valve are all connected to a transfer water station; the transfer water station is connected with a transfer pump through a transfer valve to form a raw water tank; the reverse osmosis membrane group is also connected with a scale inhibitor dosing device; the control system further comprises a DCS, and the DCS is respectively connected with the raw water pump, the raw water valve, the ultrafiltration water inlet valve, the backwashing pump, the booster pump, the high-pressure pump, the first positive discharge valve, the second positive discharge valve, the reverse discharge valve, the transfer valve and the transfer pump.
CN202011436546.3A 2020-12-11 2020-12-11 Purified DCS (distributed control system) of pure water for hydrogen peroxide process Pending CN112744947A (en)

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CN202011436546.3A CN112744947A (en) 2020-12-11 2020-12-11 Purified DCS (distributed control system) of pure water for hydrogen peroxide process

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006255652A (en) * 2005-03-18 2006-09-28 Kurita Water Ind Ltd Apparatus for producing pure water
CN104341054A (en) * 2014-10-16 2015-02-11 衢州市鼎盛化工科技有限公司 Reclaimed water recycling intelligent integrated device capable of implementing zero sewage discharge and application thereof
CN204174012U (en) * 2014-08-28 2015-02-25 宁波泽沃水处理科技有限公司 Pure water processor
CN105692965A (en) * 2016-04-13 2016-06-22 中国人民解放军第四五二医院 Emergency drinking water purifying treatment device
CN111732247A (en) * 2020-07-07 2020-10-02 江苏源邦环境科技有限公司 Semiconductor ultrapure water treatment system and process

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006255652A (en) * 2005-03-18 2006-09-28 Kurita Water Ind Ltd Apparatus for producing pure water
CN204174012U (en) * 2014-08-28 2015-02-25 宁波泽沃水处理科技有限公司 Pure water processor
CN104341054A (en) * 2014-10-16 2015-02-11 衢州市鼎盛化工科技有限公司 Reclaimed water recycling intelligent integrated device capable of implementing zero sewage discharge and application thereof
CN105692965A (en) * 2016-04-13 2016-06-22 中国人民解放军第四五二医院 Emergency drinking water purifying treatment device
CN111732247A (en) * 2020-07-07 2020-10-02 江苏源邦环境科技有限公司 Semiconductor ultrapure water treatment system and process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
祁鲁梁等: "《水处理工艺与运行管理实用手册》", 31 May 2002, 中国石化出版社 *

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Application publication date: 20210504

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