CN202632061U - Automatic reagent adding device for neutralizing treatment of acid-base waste water of heat-engine plant - Google Patents
Automatic reagent adding device for neutralizing treatment of acid-base waste water of heat-engine plant Download PDFInfo
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- CN202632061U CN202632061U CN2012200799580U CN201220079958U CN202632061U CN 202632061 U CN202632061 U CN 202632061U CN 2012200799580 U CN2012200799580 U CN 2012200799580U CN 201220079958 U CN201220079958 U CN 201220079958U CN 202632061 U CN202632061 U CN 202632061U
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- Separation Using Semi-Permeable Membranes (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
The utility model provides an automatic reagent adding device for neutralizing treatment of acid-base waste water of a heat-engine plant. An acid tank and a base tank are connected with a mixing pool through a flow valve. An outlet of the acid tank is provided with an electronic diaphragm pump I connected with an acid adding mixer. An outlet of the base tank is provided with an electronic diaphragm pump II connected with a base adding mixer. The reagent adding volume is controlled through an industrial control machine. A roots blower is connected with the mixing pool. The mixing pool is connected with a filter through a lift pump. The filter is connected with the acid adding mixer. An outlet of the acid adding mixer is connected with the base adding mixer. Automatic sampling valves are arranged on the outlet of the acid adding mixer, an outlet of the base adding mixer and an inlet and an outlet of the mixing pool and are connected with a PH sensor unit. The PH sensor unit is connected with the industrial control machine. The industrial control machine directs digital control valves to control the reagent adding volume according to collected changes of PH values and flow rates. The automatic reagent adding device for the neutralizing treatment of the acid-base waste water of the heat-engine plant provided by the utility model can solve problems of nonlinearity and time lag of PH values occurring in the neutralizing treatment of the waste water, thereby lowering the consumption of acid and base to the minimum.
Description
Technical field
The utility model relates to a kind of automatic medicine adding apparatus, is applicable to the intelligence controlling device in thermal power plant acid-base neutralization pond.
Background technology
At present, the neutralization pond in most of thermal power plants Water Treatment workshop, in carrying out acid, alkali and the time; All according to the pH value in the neutralization pond; Directly add alkali or acid adding alkali, acid-adding port respectively toward neutralization pond, and aeration agitation, wait for that acid, alkali reaction are after a period of time; Survey the pH value in the neutralization pond again, till the pH value is 6～9.This technology is sour, the alkali sufficient reaction time is long, owing to can not in time understand the pH value in the neutralization pond, often adds alkali or acid by rule of thumb; And long in carrying out like this with regulating cycle, if grasp badly, cause alkali or sour addition too much easily; Cause the waste of alkali or acid, floor area is big, and energy consumption is high; Big to human harm, be difficult to realize qualified emission standard.Its reason is to be difficult to control on the technology, before and after the eighties, has occurred the automatic CONTROL PROCESS of pH value in the world; The overwhelming majority is to a certain specific sewage, under concrete process conditions and controlled variable, adopts specific control system to carry out pH and controls automatically; These technologies are not fundamentally eliminated influences such as non-linear and hysteresis quality; Therefore, accommodation is narrow, does not possess dissemination.
The factor that influence processing acidic and alkaline wastewater neutralizes mainly contains: 1) the acid-base neutralization reaction is non-linear, in the time of near the pH value is in 6 or 9, and acid-base neutralization reaction generation hop, great changes will take place even adding neutralizing agent seldom also can cause the pH value; 2) there is certain hysteresis quality in pH meter to being determined between instrument displayed value and its actual value of pH value.Lagged behind actual value more than 20 second; 3) mixing is inhomogeneous, and during the acid-base neutralization reaction, the size of neutralizing agent addition not only depends on adding equipment, but also relevant with the variation of neutralization reaction system.
The utility model content
The pH value control problem that the utility model is difficult to be competent in order to solve common robot control system(RCS); And the severe nonlinear that effectively pH occurs during with waste water in the control with the time stickiness, provide a kind of and operate steadily, dosing precision height, acid-base neutralization pond pH value intelligence controlling device that labour intensity is low.
In order to solve the problems of the technologies described above; The utility model adopts following technical scheme that the pH value is controlled: a kind of thermal power plant acidic and alkaline waste water neutralisation treatment automatic medicine adding apparatus comprises industrial computer, electronics membrane pump one, electronics membrane pump two, pH sensor groups, filtrator, Root's blower, lift pump, flow valve and automatic sample valve.The outlet of said Root's blower and mixing pit is connected, and waste water gets into from the mixer import, said acid jar through electronics membrane pump one with add sour mixer and be connected; The alkali jar through electronics membrane pump two with add the alkali mixer and be connected, acid jar is connected with mixing pit with alkali jar use traffic valve, controls adding dose through industrial computer; The mixing pit outlet is provided with lift pump; Be provided with flow valve between lift pump and the filtrator, filtrator is connected with mixer, all is provided with automatic sample valve in the import and export that add sour mixer and add alkali mixer outlet and mixing pit; Automatically sample valve is connected with the pH sensor groups, and described pH value sensor directly is connected with industrial computer.
Adopt thermal power plant's acidic and alkaline waste water neutralisation treatment automatic medicine adding apparatus of technique scheme to be connected with the pH sensor groups through sample valve is set in mixing pit inflow point; Effectively detect the pH value of water; Make industrial computer control the dose that adds of acid jar and alkali jar accurately, pH value of waste water is adjusted between 5 ~ 10 between 1.5 ~ 12.5, sample valve is set in the mixing pit outlet; Industrial computer is through judging whether to reach requirement to the waste water after handling; To meet the requirements of the waste water suction by lift pump again and add sour mixer and add in the alkali mixer, electronics membrane pump 1 and electronics membrane pump 2 carried out the trace control of pH value, water pH value will be adjusted between 6 ~ 9 between 5 ~ 10 by industrial computer; Carry out water quality monitoring with the outlet that adds the alkali mixer adding acid, industrial computer is discerned water quality automatically and whether is reached qualified emission standard.Do not need manually-operated, supervision and control after adopting the utility model, reduced the expenditure of working strength of workers and labour cost, improved the control accuracy that adds dose simultaneously yet.
In sum, the severe nonlinear that pH occurred when the waste water during the utility model can effectively be controlled and the time stickiness.The acid-base neutralization pond pH value intelligence controlling device that provide a kind of and operate steadily, the dosing precision is high, labour intensity is low.
Description of drawings
Fig. 1 is the utility model structural representation;
Among the figure: 1 waste water; 2 acid jars; 3 alkali jars; 4 mixing pits; 5 pH sensor groups; 6 filtrators; 7 add sour mixer; 8 add the alkali mixer; 9 electronics membrane pumps one; 10 electronics membrane pumps two; 11 industrial computers; 12 Root's blowers; 13 lift pumps
Fig. 2 is the Automatic Dosing control block diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Referring to Fig. 1 and Fig. 2, acid jar, alkali jar are connected through flow valve with mixing pit, and the mixing pit inlet is provided with sample valve and is connected with the pH sensor groups; Industrial computer carries out quantitative dosing through the flow valve of controlling acid jar and the outlet of alkali jar to mixing pit after mixing pit inlet water quality is judged, the mixing pit outlet is provided with sample valve and is connected with the pH sensor groups; Sensor groups directly is connected with industrial computer; Industrial computer compares through pH value and the setting value to the mixing pit outlet, controls the operation of the lift pump in mixing pit exit, and waste water filters the back entering through filtrator and adds sour mixer and add the alkali mixer; Acid jar through electronics membrane pump one with add sour mixer and be connected; The alkali jar through electronics membrane pump two with add the alkali mixer and be connected, with adding in the alkali mixer waste water is carried out the control of step pH value trace adding sour mixer, add sour mixer and add the alkali mixer outlet and be provided with automatic sample valve; After industrial computer is judged mixer outlet water quality, whether carry out emission treatment.Industrial computer can through digital filtering, behind out-of-limit judgement, the judgement of the signal true and false and the fuzzy control software compound operation, send control signal according to the pH value of gathering and the variation of flow, commands various Numerical control valves control dosages.
Do not need manually-operated, supervision and control after adopting the utility model, reduced the expenditure of working strength of workers and labour cost, improved the control accuracy that adds dose simultaneously yet.The severe nonlinear that pH occurs when the waste water in effectively having controlled and the time stickiness.
The technology path of the utility model:
The utility model comes acid-base neutralization pond medicine system is regulated and control according to pH, through in the method that combines with Computer Control Technology with the improvement of method for waste water eliminate non-linear in the pH control and the time stickiness, medicine system is operated steadily, reliably.The practical implementation step is following:
1, the relation, the acidic and alkaline waste water pH dosing mathematical control model that change according to acidic and alkaline waste water pH value general-purpose computations model, soda acid addition and pH value obtain in the acidic and alkaline waste water and Automatic Dosing computing and controlling models.
2, the sample valve and the pH sensor groups that are connected of grug feeding jar rate of discharge valve, mixing pit lift pump, mixer outlet valve, pH sensor groups all controlled through industrial computer, makes the operation of dosing automatic steady.
Whether 3, inspection, correction pH sensor groups can accurately be moved.
4, the debugging of automatic medicament feeding system and trial run are done further adjustment to controlled variable, make system stable operation.
5, come water behind sample analysis, to convert signal to and carry out Treatment Analysis by industrial computer, industrial computer control grug feeding jar flow valve carries out dosing in mixing pit.Detect in mixing pit outlet carrying out water outlet after mixing fully, and compare calculating, judge phase one water quality situation, adjust automatically via industrial computer with the control setting value.
6, the water after mixing pit is handled carries out the control of step pH value trace via industrial computer through control electronics membrane pump in mixer; Through after the adjusting of subordinate phase; Again to the pH value and the setting value contrast of sewage, confirm whether waste discharge is qualified by industrial computer.
Claims (1)
1. thermal power plant's acidic and alkaline waste water neutralisation treatment automatic medicine adding apparatus; Comprise industrial computer (11), electronics membrane pump one (9), electronics membrane pump two (10), pH sensor groups (5), filtrator (6), Root's blower (12), lift pump (13); It is characterized in that: said Root's blower (12) is connected with mixing pit (4); Waste water (1) gets into from mixing pit (4) import, said acid jar (2) through electronics membrane pump one (9) with add sour mixer (7) and be connected, alkali jar (3) through electronics membrane pump two (10) with add alkali mixer (8) and be connected; Acid jar (2) is connected with mixing pit (4) with alkali jar (3) use traffic valve; Through industrial computer (11) soda acid is added dose and control, mixing pit (4) outlet is provided with lift pump (13), is provided with flow valve between lift pump (13) and the filtrator (6); Filtrator (6) with add sour mixer (7) and be connected; Adding sour mixer (7) and adding alkali mixer (8) outlet and the import and export of mixing pit (4) all are provided with automatic sample valve, automatic sample valve is connected with pH sensor groups (5), and described pH value sensor groups (5) directly is connected with industrial computer (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200799580U CN202632061U (en) | 2012-03-05 | 2012-03-05 | Automatic reagent adding device for neutralizing treatment of acid-base waste water of heat-engine plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200799580U CN202632061U (en) | 2012-03-05 | 2012-03-05 | Automatic reagent adding device for neutralizing treatment of acid-base waste water of heat-engine plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202632061U true CN202632061U (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200799580U Expired - Fee Related CN202632061U (en) | 2012-03-05 | 2012-03-05 | Automatic reagent adding device for neutralizing treatment of acid-base waste water of heat-engine plant |
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| Country | Link |
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| CN (1) | CN202632061U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107777765A (en) * | 2016-08-26 | 2018-03-09 | 中广核工程有限公司 | In nuclear power station acidic and alkaline waste water and discharge method and system |
| CN112327607A (en) * | 2020-11-03 | 2021-02-05 | 天津市英贝特航天科技有限公司 | Control method for eliminating instrument nonlinear measurement in pH value analysis |
-
2012
- 2012-03-05 CN CN2012200799580U patent/CN202632061U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107777765A (en) * | 2016-08-26 | 2018-03-09 | 中广核工程有限公司 | In nuclear power station acidic and alkaline waste water and discharge method and system |
| CN112327607A (en) * | 2020-11-03 | 2021-02-05 | 天津市英贝特航天科技有限公司 | Control method for eliminating instrument nonlinear measurement in pH value analysis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20140305 |