CN102328983A - Deionized water ammonia addition device by membrane process - Google Patents
Deionized water ammonia addition device by membrane process Download PDFInfo
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- CN102328983A CN102328983A CN201110216505A CN201110216505A CN102328983A CN 102328983 A CN102328983 A CN 102328983A CN 201110216505 A CN201110216505 A CN 201110216505A CN 201110216505 A CN201110216505 A CN 201110216505A CN 102328983 A CN102328983 A CN 102328983A
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Abstract
The invention discloses a deionized water ammonia addition device by a membrane process, which is used for adding ammonia gas in an ammonification pipe into a water delivery pipe. The ammonia addition control device comprises a first gas phase membrane connected with the ammonia addition pipe, a second gas phase membrane connected with the water delivery pipe in parallel, and a third gas phase membrane; the third gas phase membrane is connected with the first gas phase membrane through a pipeline to form a liquid phase loop; the third gas phase membrane is connected with the second gas phase membrane through a pipeline to form a gas phase loop; and the gas phase loop is provided with a carrier gas supplementing pipe for supplementing carrier gas. The ammonia addition control device fully utilizes the gas liquid separation function of the first gas phase membrane, so that the ammonia gas in the ammonia addition pipe is dissolved into a saturated ammonia aqueous solution in the liquid phase loop; the ammonia gas in the saturated ammonia aqueous solution is extracted by the aid of the function of the third gas phase membrane, and delivered into the gas phase loop; and after being diluted by the carrier gas, the ammonia gas finally passes through the second gas phase membrane to form a low-concentration ammonia aqueous solution, and the ammonia aqueous solution enters the water delivery pipeline. The invention has the advantage of high control accuracy, and can implement concentration control from PPM level to PPB level.
Description
[technical field]
The present invention relates to water treating equipment, particularly relate to a kind of embrane method deionized water ammonifying device.
[background technology]
Many with water production device in, the oiler feed such as power plant produces because of the pH value of water in the system is lower, has hydrogen evolution corrosion and the harm that destroys the ponding surface protection film.In order to prevent gyp, oxidation and corrosion, generally be the ammonia that in feedwater, adds trace, with the pH value that guarantees water in suitable scope.At present; Boiler feedwater and water of condensation ammonification adopt common chemicals dosing plant to carry out ammonification usually; Adopt the solution of big medicinal cupping configuration low concentration, perhaps combine feedback control such as online PH table through flow control, use volume pump that soup is directly injected deionized water.But, this dissolving ammonifying device complex structure, bulky, need regularly to mix; The automatic medicine-mixing cost is high, and it is tired manually to mix drug anesthesia, and ammonia is volatile harmful to operator's health; Along with the volatilization of ammonia, the ammoniacal liquor concentration in the grug feeding jar can change, and causes the ammonification precision to reduce.Feedback controling mode is adopted in the dissolving ammonification, and delay of feedback just can't be avoided, and during the quantitative ammonification of employing rampump, small pressure change all can increase the ammonification error greatly.The ammonification of venturi tube negative pressure is adopted in the vacuum ammonification usually, and volume is little, yet because the compressibility of gas; Cause direct ammonia residual to be difficult to control; Under the situation of hydraulic pressure subtle change, the ammonification error will be very big, for micro-ammonification; Need reach the PPM level like the concentration control accuracy, vacuum ammonification mode can't guarantee its control accuracy.
The way that a kind of use is carried out ammonification with the differential pressure type mixing tank has also appearred at present.Can very accurately realize mixed within the specific limits with the differential pressure type mixing tank and do not receive the influence of flow, pressure change.But ammonia has two problems to need to solve in dissolution process: can discharge solution heat during the dissolving of (1) ammonia, cause the ammonia solution temperature sharply to raise, influence film work-ing life, the water of differing temps can influence the ammonification precision to the solubleness of ammonia also difference; (2) because the solubleness of ammonia in water is very big; And only require the ammonia that adds trace in the water, even to require the concentration of ammonia in water be the PPM level, this is very high to the mixing tank accuracy requirement; Manufacturing cost is also very high, is difficult to accurately accomplish the adjusting of this PPM level concentration with the differential pressure type mixing tank.
[summary of the invention]
Based on this, be necessary the ammonification gear that provides a kind of ammonification tolerance range higher.
A kind of ammonification gear; Be used for the ammonia of ammonification pipe is added in the hydraulic pipe; Second gas phase membrane and the 3rd gas phase membrane that said ammonification gear comprises first gas phase membrane that is connected with the ammonification pipe, is connected in parallel with hydraulic pipe, the 3rd gas phase membrane and first gas phase membrane are through the pipeline formation liquid phase loop that links to each other; The 3rd gas phase membrane links to each other through pipeline with second gas phase membrane and constitutes the gas phase loop, also is provided with the carrier gas blowdown pipe that is used for make-up carrier gas on the gas phase loop.
In a preferred embodiment, said liquid phase loop is provided with filling pipe.
In a preferred embodiment, also be provided with liquid circulating pump on the said liquid phase loop.
In a preferred embodiment, also be provided with scatterer on the said liquid phase loop.
In a preferred embodiment, said gas phase loop is provided with gas recycle pump.
In a preferred embodiment, said gas phase loop is provided with gas pressure reducer.
In a preferred embodiment, said second gas phase membrane pipeline parallelly connected with hydraulic pipe is provided with the proportional diverting device.
In a preferred embodiment, said carrier gas is a nitrogen.
Above-mentioned ammonification gear makes full use of the gas-liquid separating function of first gas phase membrane; Ammonia in the ammonification pipe is dissolved into the saturated ammonia aqueous solution in the liquid phase loop, and the gas-liquid separating function through the 3rd gas phase membrane extracts the ammonia in the saturated ammonia aqueous solution again, is transported in the gas phase loop; Through after the dilution of carrier gas; Ammonia soln through second gas phase membrane formation lower concentration enters into hydraulic pipe at last, and control accuracy is high, can realize the concentration adjustment of PPM to PPB level.
[description of drawings]
Fig. 1 is the ammonification gear structural representation of an embodiment.
[embodiment]
Be described further below in conjunction with accompanying drawing and specific embodiment.
As shown in Figure 1, the ammonification gear 100 of an embodiment is used for the ammonia of ammonification pipe 10 is added in the hydraulic pipe 50, comprises first gas phase membrane 20, the 3rd gas phase membrane 30 and second gas phase membrane 40.
Gas phase membrane has the solid of obstruct and liquid, the characteristic that only allows gas to pass freely through.First gas phase membrane 20 has very big specific surface area, and ammonia can directly be dissolved in the liquid phase rapidly through first gas phase membrane 20.
The 3rd gas phase membrane 30 constitutes liquid phase loop 21 through the pipeline and first gas phase membrane 20.Ammonia forms the saturated ammonia aqueous solution through the 20 back dissolvings of first gas phase membrane; The saturated ammonia aqueous solution is gone up the clockwise direction of arrow by figure and is flowed to the 3rd gas phase membrane 30; And under the effect of the 3rd gas phase membrane 30; Separate the ammonia in the ammoniacal liquor, the solution after obtaining separating flows to first gas phase membrane 20 again, constitutes circulation with this.Because the meltage of ammonia is a definite value in the saturated ammonia aqueous solution, therefore the amount of isolated ammonia also is the definite value that can accurately control from saturated ammoniacal liquor.
In order to strengthen the liquid-flow in the liquid phase loop 21, liquid phase loop 21 is provided with liquid circulating pump 22 and filling pipe 23.
Cause that in order to prevent that ammonia from dissolving fast the temperature rising is too fast, on liquid phase loop 21, also be provided with scatterer 24.
Second gas phase membrane 40 and the formation gas phase loop 31 that links to each other through pipeline the 3rd gas phase membrane 30.Also be provided with the carrier gas blowdown pipe 32 that is used for make-up carrier gas on the gas phase loop 31.Ammonia gets into gas phase loop 31 through behind the 3rd gas phase membrane 30, in gas phase loop 31, mixes with carrier gas then, forms the lower ammonia-carrier gas mixed gas of ammonia dividing potential drop.This ammonia-carrier gas mixed gas is gone up the clockwise direction of arrow by figure and is flowed to second gas phase membrane 40, and under the effect of second gas phase membrane 40, ammonia is dissolved in the liquid phase again, and the 3rd gas phase membrane 30 is then flowed back in carrier gas once more, constitutes circulation with this.The content of ammonia can be controlled through the feeding amount of regulating carrier gas in above-mentioned ammonia-carrier gas mixed gas.
In order to strengthen the gas flow in the gas phase loop 31, also be provided with gas recycle pump 41 on the gas phase loop 31.
In order damping to be provided for gas recycle pump 41, the gas phase end at second gas phase membrane forms low-voltage vacuum simultaneously, further reduces the dividing potential drop of ammonia in the mixed gas, on gas phase loop 31, also is provided with gas pressure reducer 34.
Above-mentioned carrier gas is not for reacting with ammonia, and water-fast gas, for example nitrogen or rare gas element.Be preferably nitrogen.
Second gas phase membrane 40 and hydraulic pipe 50 are connected in parallel through pipeline, and promptly hydraulic pipe 50 is provided with and passes the shunt 51 of flowing back to hydraulic pipe 50 again behind second gas phase membrane 40.Above-mentioned ammonia-carrier gas mixed gas can be separated ammonia and is dissolved into along separate routes in 51 under the effect of second gas phase membrane 40, flows into then in the hydraulic pipe 50.
In order further to control 51 the water yield along separate routes, also be provided with proportional diverting device 52 in the shunt 51.
The concrete method of use of above-mentioned ammonification gear 100 is following:
From ammonification pipe 10, import ammonia, ammonia is dissolved in the water behind first gas phase membrane 20, forms the saturated ammonia aqueous solution (concentration be 30%) usually entering liquid phase loop 21.Saturated ammoniacal liquor separates producing ammonia under the effect of the 3rd gas phase membrane 30.Ammonia after the 3rd gas phase membrane 30 separates gets in the pipeline in gas phase loop 31, and the nitrogen of going into benefit in the carrier gas blowdown pipe 32 mixes, and forms ammonia-nitrogen mixture body, reaches the effect of diluting ammonia, reducing the concentration of ammonia.Ammonia-nitrogen mixture body is under the effect of second gas phase membrane 40; Ammonia is dissolved in the water by shunt 51 pipelines of hydraulic pipe 50 again; Form lower (for example the being 0.5%) ammonia soln of concentration; At last by proportional diverting device 52 proportional mixing to hydraulic pipe 50, to reach in the hydraulic pipe 50 the accurately purpose of ammonification.
The gas phase membrane element has very big specific surface area, and gas can be dissolved into rapidly in the liquid phase through gas phase membrane, and therefore, dissolving a large amount of gas only needs very little gas phase membrane element, can save a lot of floor spaces.Above-mentioned ammonification gear utilizes the easy solvability of ammonia, the easy volatile of ammoniacal liquor, and the gaseous phase partial pressure that reduces ammonia, obtains the ammonia solution of lower concentration.
Usually the saturated ammonia aqueous solution with 30% concentration is diluted to 0.5ppm, needs the proportional diverting device to reach 600,000 times adjusting ratio.After ammonia solution is adjusted to 0.5%-0.1% concentration in advance, regulate than can reduce 60-300 times, can significantly reduce regulating error like this, the temperature rise that the ammonia solution that concentration is enough low causes in the ammonia dissolution process also can be controlled in the tolerance interval.
Above-mentioned ammonification gear makes full use of the gas-liquid separating function of first gas phase membrane; Ammonia in the ammonification pipe is dissolved into the formation saturated ammonia aqueous solution in the water in the liquid phase loop, and the gas-liquid separating function through the 3rd gas phase membrane extracts the ammonia in the saturated ammonia aqueous solution again, is transported in the gas phase loop; Through after the dilution of carrier gas; Ammonia soln through second gas phase membrane formation lower concentration enters into hydraulic pipe at last, and control accuracy is high, can realize the concentration adjustment of PPM to PPB level.
Adopt the big medicinal cupping ammonifying device weight of tradition to reach hundreds of kilograms, take up an area of several square metres cumbersome apparatus, substitute with the ammonification gear of this embodiment, reach the regulating effect that former chemicals dosing plant rises, equipment that only need tens kilogram weights takes up an area of minimum.
In addition, above-mentioned ammonifying device control texture is simple, and cost is low, and failure rate is low, safeguards simple and convenient; Because the ammonification gear is a totally enclosed, and ultralow pressure confession ammonia, thereby reduced the ammonia leakage, safe; Need not to adopt machinery or induction stirring in the ammonification process, avoided traditional method adding medicine in pipeline to cause the contaminating impurity problem.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (8)
1. ammonification gear; Be used for the ammonia of ammonification pipe is joined in the hydraulic pipe; It is characterized in that; Second gas phase membrane and the 3rd gas phase membrane that said ammonification gear comprises first gas phase membrane that is connected with said ammonification pipe, is connected in parallel with said hydraulic pipe, said the 3rd gas phase membrane and said first gas phase membrane are through the pipeline formation liquid phase loop that links to each other; Said the 3rd gas phase membrane links to each other through pipeline with said second gas phase membrane and constitutes the gas phase loop, also is provided with the carrier gas blowdown pipe that is used for make-up carrier gas on the said gas phase loop.
2. ammonification gear according to claim 1 is characterized in that, said liquid phase loop is provided with filling pipe.
3. ammonification gear according to claim 1 is characterized in that, said liquid phase also is provided with liquid circulating pump on the loop.
4. ammonification gear according to claim 1 is characterized in that, said liquid phase also is provided with scatterer on the loop.
5. ammonification gear according to claim 1 is characterized in that, said gas phase loop is provided with gas recycle pump.
6. ammonification gear according to claim 1 is characterized in that, said gas phase loop is provided with gas pressure reducer.
7. ammonification gear according to claim 1 is characterized in that, said second gas phase membrane pipeline parallelly connected with said hydraulic pipe is provided with the proportional diverting device.
8. ammonification gear according to claim 1 is characterized in that, said carrier gas is a nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110216505 CN102328983B (en) | 2011-07-29 | 2011-07-29 | Deionized water ammonia addition device by membrane process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110216505 CN102328983B (en) | 2011-07-29 | 2011-07-29 | Deionized water ammonia addition device by membrane process |
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| Publication Number | Publication Date |
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| CN102328983A true CN102328983A (en) | 2012-01-25 |
| CN102328983B CN102328983B (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110216505 Expired - Fee Related CN102328983B (en) | 2011-07-29 | 2011-07-29 | Deionized water ammonia addition device by membrane process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466777A (en) * | 2013-09-18 | 2013-12-25 | 赤峰科安水处理技术设备有限责任公司 | Boiler ammoniating device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2260241Y (en) * | 1996-06-12 | 1997-08-20 | 牡丹江第二发电厂电力科技开发公司 | Device for automatically feeding chemicals |
| CN2683635Y (en) * | 2004-03-21 | 2005-03-09 | 郭亮 | Enclosed ammoniating apparatus |
| CN202272767U (en) * | 2011-07-29 | 2012-06-13 | 深圳市超纯环保股份有限公司 | Film method deionized water ammonfication device |
-
2011
- 2011-07-29 CN CN 201110216505 patent/CN102328983B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2260241Y (en) * | 1996-06-12 | 1997-08-20 | 牡丹江第二发电厂电力科技开发公司 | Device for automatically feeding chemicals |
| CN2683635Y (en) * | 2004-03-21 | 2005-03-09 | 郭亮 | Enclosed ammoniating apparatus |
| CN202272767U (en) * | 2011-07-29 | 2012-06-13 | 深圳市超纯环保股份有限公司 | Film method deionized water ammonfication device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466777A (en) * | 2013-09-18 | 2013-12-25 | 赤峰科安水处理技术设备有限责任公司 | Boiler ammoniating device |
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| CN102328983B (en) | 2013-09-04 |
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Denomination of invention: Deionized water ammonia addition device by membrane process Effective date of registration: 20141203 Granted publication date: 20130904 Pledgee: Shenzhen high tech investment and financing Company limited by guarantee Pledgor: Shenzhen Ultrapure Environmental Technology Co., Ltd. Registration number: 2014990001022 |
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