CN105366791A - DCS control method for adjusting alkaline waste water pH - Google Patents
DCS control method for adjusting alkaline waste water pH Download PDFInfo
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- CN105366791A CN105366791A CN201510767753.XA CN201510767753A CN105366791A CN 105366791 A CN105366791 A CN 105366791A CN 201510767753 A CN201510767753 A CN 201510767753A CN 105366791 A CN105366791 A CN 105366791A
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- waste water
- alkaline waste
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- control method
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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)
- Treating Waste Gases (AREA)
Abstract
The invention relates to a DCS control method for adjusting an alkaline waste water pH. The method comprises 1, reading three parameter values, 2, calculating acid gas addition flow, 3, inputting the flow calculated value and 4, comparing the current detected pH and preset calculated pH, if the current detected pH is equal to the preset calculated pH, feeding the alkaline waste water subjected to pH adjustment into the next process so that the current process is finished, and carrying out the above circulation from the step 3. The DCS control method for adjusting the alkaline waste water pH realizes easy control of alkaline waste water pH adjustment, reduces a safety risk, prevents liquid acid corrosion and safety problems, reduces an operation cost and has substantial environment and economic benefits.
Description
Technical field
The present invention relates to field of waste water treatment, be particularly applicable to the DCS control method regulating alkaline waste water pH value.
Background technology
At present, China is global maximum alkaline production base, end all kinds of alkali output in 2014 and reached forty-two million ton, the problem of the high energy consumption that a large amount of alkaline and the enterprise consuming alkali not only face, and the pH regulator containing alkali waste water produced in production process highlights day by day with the harm bringing environment.
The method of traditional adjust ph adopts fluid sulphuric acid, nitric acid, hydrochloric acid to drip, this mode brings suppression to the microbial reproduction of the sewage disposal in downstream and growth, there is following problem in the control method of existing pH value: one is in the waste water after being regulated by three kinds of acid, sulfate radical can produce hydrogen sulfide in wastewater biochemical reduction process, hydrogen sulfide is highly toxic substance to microorganism, causes sewage to run and is obstructed; Two is that the adjustment of hydrochloric acid adds chlorine root, and chlorine root not only to corrosive pipeline, and has restraining effect higher than the chlorine root of 1000mg/l to microorganism; Three is adopt the waste water of nitric acid treatment, not only will consider the storage safe problem of nitric acid, and nitrate radical enter water body after need to be processed by nitrification and denitrification, bring difficulty to sewage treatment process.Be easy to make alkaline waste water pH regulator value control, reduce security risk, the method how utilizing DCS to control regulates alkaline waste water pH value, becomes problem in the urgent need to address.
Summary of the invention
For the problems referred to above that prior art exists, the invention provides a kind of DCS control method regulating alkaline waste water pH value, the present invention is easy to control, dangerous little, avoids the burn into security problems of liquid acid.
The technical solution used in the present invention is: a kind of DCS control method regulating alkaline waste water pH value, comprises the steps:
read following three parameter values: the import of reading flow quantity sensor, pH sensor display contains flow and the pH value of alkali waste water, reads the content of acid gas of main content level sensor display;
automatically calculate sour gas according to above-mentioned three parameter DCS Controlling System and add inbound traffics;
control sour gas flow by flow director after the input of flow rate calculation value, sour gas, through variable valve, shows current detection pH value by sour gas flow sensor;
described current detection pH value is calculated pH value and compares with presetting, if described current detection pH value equals to preset calculate pH value, then will regulate the alkaline waste water feeding subsequent processing of pH value, this EP (end of program);
otherwise again from step
start.
Beneficial effect of the present invention: the method that the present invention utilizes DCS to control regulates alkaline waste water pH value, makes alkaline waste water pH regulator value be easy to control, reduces security risk; Avoid the burn into security problems of liquid acid, and can reduce running cost, environmental economical profit is remarkable.
Accompanying drawing explanation
Fig. 1 is DCS control method schema of the present invention.
Embodiment
With reference to accompanying drawing 1, the specific embodiment of the present invention is as follows:
Regulate a DCS control method for alkaline waste water pH value, comprise the steps:
read following three parameter values: the import of reading flow quantity sensor, pH sensor display contains flow and the pH value of alkali waste water, reads the content of acid gas of main content level sensor display;
automatically calculate sour gas according to above-mentioned three parameter DCS Controlling System and add inbound traffics;
control sour gas flow by flow director after the input of flow rate calculation value, sour gas, through variable valve, shows current detection pH value by sour gas flow sensor;
described current detection pH value is calculated pH value and compares with presetting, if described current detection pH value equals to preset calculate pH value, then will regulate the alkaline waste water feeding subsequent processing of pH value, this EP (end of program);
otherwise again from step
start.
Claims (1)
1. regulate a DCS control method for alkaline waste water pH value, it is characterized in that comprising the steps:
read following three parameter values: the import of reading flow quantity sensor, pH sensor display contains flow and the pH value of alkali waste water, reads the content of acid gas of main content level sensor display;
automatically calculate sour gas according to above-mentioned three parameter DCS Controlling System and add inbound traffics;
control sour gas flow by flow director after the input of flow rate calculation value, sour gas, through variable valve, shows current detection pH value by sour gas flow sensor;
described current detection pH value is calculated pH value and compares with presetting, if described current detection pH value equals to preset calculate pH value, then will regulate the alkaline waste water feeding subsequent processing of pH value, this EP (end of program);
otherwise again from step
start.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510767753.XA CN105366791A (en) | 2015-11-12 | 2015-11-12 | DCS control method for adjusting alkaline waste water pH |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510767753.XA CN105366791A (en) | 2015-11-12 | 2015-11-12 | DCS control method for adjusting alkaline waste water pH |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105366791A true CN105366791A (en) | 2016-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510767753.XA Pending CN105366791A (en) | 2015-11-12 | 2015-11-12 | DCS control method for adjusting alkaline waste water pH |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109368760A (en) * | 2018-10-15 | 2019-02-22 | 万华化学集团股份有限公司 | A kind of method that wastewater pH self adaptive control is realized in dcs |
| CN110745932A (en) * | 2019-10-28 | 2020-02-04 | 万华化学集团股份有限公司 | DCS-based three-level wastewater pH control method and system |
| CN114115374A (en) * | 2021-11-30 | 2022-03-01 | 宝钢化工湛江有限公司 | System and method for regulating and controlling pH value of dephenolizing device |
| CN115636415A (en) * | 2022-10-27 | 2023-01-24 | 扬州嘉辉新能源有限公司 | Polycrystalline silicon acid pickling impurity removal equipment and impurity removal method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923834A (en) * | 2012-10-23 | 2013-02-13 | 鞍钢股份有限公司 | Method for neutralizing industrial wastewater by jump-type automatic feeding |
| CN104649473A (en) * | 2015-01-08 | 2015-05-27 | 上海城市水资源开发利用国家工程中心有限公司 | Device and method for controlling concentration of residual aluminum in process of high pH raw water treatment |
-
2015
- 2015-11-12 CN CN201510767753.XA patent/CN105366791A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923834A (en) * | 2012-10-23 | 2013-02-13 | 鞍钢股份有限公司 | Method for neutralizing industrial wastewater by jump-type automatic feeding |
| CN104649473A (en) * | 2015-01-08 | 2015-05-27 | 上海城市水资源开发利用国家工程中心有限公司 | Device and method for controlling concentration of residual aluminum in process of high pH raw water treatment |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109368760A (en) * | 2018-10-15 | 2019-02-22 | 万华化学集团股份有限公司 | A kind of method that wastewater pH self adaptive control is realized in dcs |
| CN109368760B (en) * | 2018-10-15 | 2021-09-07 | 万华化学集团股份有限公司 | Method for realizing self-adaptive control of wastewater pH in DCS |
| CN110745932A (en) * | 2019-10-28 | 2020-02-04 | 万华化学集团股份有限公司 | DCS-based three-level wastewater pH control method and system |
| CN110745932B (en) * | 2019-10-28 | 2022-07-12 | 万华化学集团股份有限公司 | DCS-based three-level wastewater pH control method and system |
| CN114115374A (en) * | 2021-11-30 | 2022-03-01 | 宝钢化工湛江有限公司 | System and method for regulating and controlling pH value of dephenolizing device |
| CN115636415A (en) * | 2022-10-27 | 2023-01-24 | 扬州嘉辉新能源有限公司 | Polycrystalline silicon acid pickling impurity removal equipment and impurity removal method |
| CN115636415B (en) * | 2022-10-27 | 2024-02-27 | 扬州嘉辉新能源有限公司 | Polysilicon acid washing impurity removing equipment and impurity removing method |
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Application publication date: 20160302 |
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| WD01 | Invention patent application deemed withdrawn after publication |