CN102500144B - Precision processing system for condensed water and chemical cleaning method for filter element of precision processing system - Google Patents
Precision processing system for condensed water and chemical cleaning method for filter element of precision processing system Download PDFInfo
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- CN102500144B CN102500144B CN201110350699.0A CN201110350699A CN102500144B CN 102500144 B CN102500144 B CN 102500144B CN 201110350699 A CN201110350699 A CN 201110350699A CN 102500144 B CN102500144 B CN 102500144B
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Abstract
The invention discloses a precision processing system for condensed water and a chemical cleaning method for a filter element of the precision processing system. The system comprises powder resin filters, a membrane paving device, a compressed air input device, a backwashing water input device and an effluent collection and discharge device, wherein the membrane paving device comprises a resin mixed box and a membrane paving box; and a heating steam input pipeline I and a heating steam input pipeline II which are connected with heating steam generation equipment are arranged in the resin mixed box and the membrane paving box. The cleaning method comprises the following steps of: 1, performing alkali washing, namely breaking a filter membrane and backwashing, filling water into the filters for later use, preparing alkaline washing liquor for cleaning, cleaning the paved membrane circularly, performing oscillation cleaning and cleaning by the residual alkaline washing liquor; and 2, performing acid washing, filling the water into the filters for later use, preparing acidic washing liquor for cleaning, cleaning the paved membrane circularly, performing the oscillation cleaning and cleaning by the residual acid washing liquor. The precision processing system has a simple structure, is reasonable in design, easy and convenient to operate and control and low in investment cost; and the cleaning method is simple and has a good cleaning effect, and the color of the cleaned filter element is converted into white serving as the original color.
Description
Technical field
The invention belongs to powdered resin precoat filter applied technical field, especially relate to the chemical cleaning method of a kind of condensed water precision processing system and filter filter element thereof.
Background technology
In recent years, at the relatively deficient northern area of water resource, Direct Air-cooled Unit has obtained development fast owing to having good water-saving performance.For the feature of such condensate water, domestic general employing high speed Yang Yin divides bed system and two kinds of precision processing techniques of Filter System Covered by Powder-resin.Wherein, the features such as powdered resin precoat filter is high with its equipment powdex adaptive temperature, equipment is simple, handiness become the Condensate Polishing Mode in Coal-firing of Direct Air-cooled Unit first-selection, in Shanxi, the ground such as Hebei, the Inner Mongol, Shaanxi, Ningxia obtained good application.
Powdered resin precoat filter is used for Air-cooled Unit, in actual use procedure, owing to can continuing to have the excess load dirt powdered resin precoat filter of flowing through in Air-cooled Unit test run process, thereby the filter element of powdered resin precoat filter mainly works to filter foreign material in precision processing system, after using certain phase, filter element can be by the impurity pollution in system, its dirty removal capacities is reduced greatly, pressure reduction in service rises too fast, thereby has a strong impact on the economy of powdered resin precoat filter operation.In actual use procedure, powdered resin precoat filter is after long operation, often find that its filter element darkens, part also can present black, the filter element surface of some power plant also has the material of similar grease to cover, can cause so quick-fried film, the plastic film mulch of powdered resin precoat filter, the frequency putting into operation etc. to increase gradually, have a strong impact on the operation of powdered resin precoat filter and the Water Vapor Quality of unit.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, provide a kind of simple in structure, reasonable in design, control condensed water precision processing system easy and that input cost is low, result of use is good.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of condensed water precision processing system, comprises powdex and the plastic film mulch device, compressed air input unit, backwash water input unit and waste collection and the tapping equipment that join with powdex respectively; It is characterized in that: described plastic film mulch device comprises mixed with resin case and plastic film mulch case, the discharging opening of described mixed with resin case joins by the discharging opening of plastic film mulch injection pipeline and plastic film mulch case, plastic film mulch syringe pump and pipeline control valve five are housed on plastic film mulch injection pipeline, the discharging opening of plastic film mulch case joins by the import of plastic film mulch pipeline and powdex, and the outlet of powdex is joined by the charging aperture of circulation line and plastic film mulch case, plastic film mulch pump and pipeline control valve six are housed on described plastic film mulch pipeline; Described backwash water inlet channel passes into mixed with resin case and plastic film mulch case by water inlet pipe one and water inlet pipe two respectively, in described mixed with resin case and plastic film mulch case, be respectively arranged with heating steam input channel one and heating steam input channel two, heating steam input channel one and heating steam input channel two all join with heating steam generation equipment, and heating steam input channel one and heating steam input channel two are equipped with respectively pipeline control valve nine and pipeline control valve ten; Described plastic film mulch case, plastic film mulch pipeline, plastic film mulch pump, powdex and circulation line form the plastic film mulch circulatory system, and described mixed with resin case, plastic film mulch injection pipeline and plastic film mulch syringe pump form notes film system from film to the described plastic film mulch circulatory system that note.
Above-mentioned a kind of condensed water precision processing system, is characterized in that: described plastic film mulch injection delivery side of pump passes into mixed with resin case by circulating line, and pipeline control valve eight is housed on circulating line.
Above-mentioned a kind of condensed water precision processing system, it is characterized in that: the flow of described heating steam input channel one and two interior the inputted heating steams of heating steam input channel is 20t/h ± 5t/h, the temperature of heating steam input channel one and two interior the inputted heating steams of heating steam input channel is 0.8MPa ± 0.2MPa higher than 200 ℃ and its pressure.
Above-mentioned a kind of condensed water precision processing system, it is characterized in that: the quantity of described powdex is two, the quantity of described plastic film mulch device, compressed air input unit, backwash water input unit and waste collection and tapping equipment is one, and two described powdexs share a described plastic film mulch device, share a described compressed air input unit, share a described backwash water input unit and share a described waste collection and tapping equipment.
Meanwhile, the invention also discloses a kind of method step simple, realize convenient and cost is low, cleaning performance is good that the filter filter element of described condensed water precision processing system is carried out to the method for Chemical cleaning, it is characterized in that the method comprises the following steps:
Step 1, alkali cleaning, its alkaline cleaning procedure is as follows:
101, quick-fried film backwash: according to quick-fried film and the back-flushing method of conventional powdex, and by described compressed air input unit and described backwash water input unit, powdex is carried out to quick-fried film and backwash;
102, filter filling up water is standby: by described backwash water input unit, to standby after filling up water in powdex;
103, clean and make of alkali wash water: by described backwash water input unit, in mixed with resin case, note demineralized water, alkali cleaning medicine is dropped in mixed with resin case simultaneously, and by set agitator in mixed with resin case, added alkali cleaning medicine is mixed to formation alkali wash water with demineralized water; In described alkali wash water whipping process, by heating steam input channel one, in mixed with resin case, pass into heating steam the temperature of described alkali wash water is maintained to 50 ℃ ± 5 ℃, by heating steam input channel two, in plastic film mulch case, pass into heating steam so that plastic film mulch case internal temperature is maintained to 50 ℃ ± 5 ℃ simultaneously; The conventional alkali cleaning medicine of described alkali cleaning medicine for powdex is cleaned;
104, plastic film mulch wash cycles: according to the plastic film mulch method of conventional powdex, by the described plastic film mulch circulatory system, setting up plastic film mulch circulates, and in plastic film mulch cyclic process, by the alkali wash water described in step 103, the described plastic film mulch circulatory system is carried out to wash cycles, the wash cycles time is 8 hours～10 hours; In plastic film mulch cyclic process, by described notes film system, continue to inject described alkali wash water in the described plastic film mulch circulatory system;
105, oscillation cleaning, its cleaning process is as follows:
1051, oscillation cleaning for the first time: the air pressure of opening compressed air storage tank is adjusted valve, until the air pressure of Compressed Gas in compressed air storage tank is adjusted to 0.4MPa ± 0.05MPa; Meanwhile, open air bleeding valve and the blowdown control valve of powdex, until the water level in powdex is adjusted to sight glass one middle part, complete oscillation cleaning process for the first time;
1052, oscillation cleaning for the second time: the air pressure of opening compressed air storage tank is adjusted valve, until the air pressure of Compressed Gas in compressed air storage tank is adjusted to 0.4MPa ± 0.05MPa; Meanwhile, open air bleeding valve and the blowdown control valve of powdex, the water level in powdex is adjusted to sight glass two middle parts, complete oscillation cleaning process for the second time;
1053, oscillation cleaning for the third time: the air pressure of opening compressed air storage tank is adjusted valve, until the air pressure of Compressed Gas in compressed air storage tank is adjusted to 0.4MPa ± 0.05MPa; Meanwhile, open air bleeding valve and the blowdown control valve of powdex, the water level in powdex is adjusted to sight glass three middle parts, complete oscillation cleaning process for the third time;
Described sight glass one, sight glass two and sight glass three are for being laid in three sight glass on powdex from top to bottom;
106, however, residual base washing lotion is cleaned: first put the clean described plastic film mulch circulatory system and the intrasystem all liq solution of described notes film, by described backwash water input unit, powdex is carried out to backwash until go out clarification of water again, then by the described plastic film mulch circulatory system, set up plastic film mulch and circulate, and in plastic film mulch cyclic process, the demineralized water by described backwash water input unit input carries out wash cycles until water outlet is clean to the described plastic film mulch circulatory system; In plastic film mulch cyclic process, by described notes film system, continue to inject demineralized water in the described plastic film mulch circulatory system;
201, filter filling up water is standby: by described backwash water input unit, to standby after filling up water in powdex;
202, clean and make of pickle: citric acid crystal is added in mixed with resin case, and by set agitator in mixed with resin case, added citric acid crystal is mixed to formation citric acid solution with demineralized water; In described citric acid solution whipping process, by heating steam input channel one, in mixed with resin case, pass into heating steam the temperature of described citric acid solution is maintained to 75 ℃～85 ℃, by heating steam input channel two, in plastic film mulch case, pass into heating steam so that plastic film mulch case internal temperature is maintained to 50 ℃ ± 5 ℃ simultaneously;
203, plastic film mulch wash cycles: according to the plastic film mulch method of conventional powdex, by the described plastic film mulch circulatory system, setting up plastic film mulch circulates, and in plastic film mulch cyclic process, by the citric acid solution described in step 202, the described plastic film mulch circulatory system is carried out to wash cycles, the wash cycles time is 6 hours～8 hours; In plastic film mulch cyclic process, by described notes film system, continue to inject described citric acid solution in the described plastic film mulch circulatory system, and when injecting described citric acid solution, in described citric acid solution, add continuously ammoniacal liquor so that the pH value of described citric acid solution is maintained to 3.5～4.0;
204, oscillation cleaning: to the vibration cleaning method described in step 1053, complete oscillation cleaning process three times according to step 1051;
205, remaining pickle cleans: first put the clean described plastic film mulch circulatory system and the intrasystem all liq solution of described notes film, by described backwash water input unit, powdex (1) is carried out to backwash until go out clarification of water again, then by the described plastic film mulch circulatory system, set up plastic film mulch and circulate, and in plastic film mulch cyclic process, the demineralized water by described backwash water input unit input carries out wash cycles until water outlet is clean to the described plastic film mulch circulatory system; In plastic film mulch cyclic process, by described notes film system, continue to inject demineralized water in the described plastic film mulch circulatory system.
The chemical cleaning method of above-mentioned a kind of condensed water precision processing system filter filter element, is characterized in that: described in step 202 citric acid crystal is added in mixed with resin case before, also need to add citric acid corrosion inhibiter in mixed with resin case.
The chemical cleaning method of above-mentioned a kind of condensed water precision processing system filter filter element, is characterized in that: described citric acid corrosion inhibiter is that mass concentration is 0.3% citric acid corrosion inhibiter.
The chemical cleaning method of above-mentioned a kind of condensed water precision processing system filter filter element, is characterized in that: the alkali cleaning medicine described in step 103 is NaOH powder and Na
2hPO
4powder, wherein the mass percent of NaOH powder and described alkali wash water is 0.5%～0.8%, Na
2hPO
4the mass percent of powder and described alkali wash water is 0.2%～0.5%.
The chemical cleaning method of above-mentioned a kind of condensed water precision processing system filter filter element, is characterized in that: the mass percent of the crystal of citric acid described in step 202 and described citric acid solution is 2%～4%.
The chemical cleaning method of above-mentioned a kind of condensed water precision processing system filter filter element, is characterized in that: in step 1051, step 1052 and step 1053, all the air pressure of Compressed Gas in compressed air storage tank is adjusted to 0.4MPa.
The present invention compared with prior art has the following advantages:
1, to the existing condensed water precision processing system adjustment based on powdered resin precoat filter seldom, only need interim circulating line and heating steam input channel one and the heating steam input channel two installed, install very simple and input cost is lower, the problem such as the cleaning inconvenience, length consuming time, the cleaning performance that exist in the time of effectively solving existing condensed water precision processing system filter filter element is cleaned are poor.
2, use easy and simple to handle and intelligent degree high, not only can clean by off-line, can also realize online Chemical cleaning.
3, input cost is low and economic cost is cheap, can effectively avoid a large amount of operating costs that increase because frequently carrying out quick-fried film, plastic film mulch.
4, operate simple and easyly, most cleaning processes are all moved automatically by the internal processes of condensed water precision processing system, and manpower is mainly to carry out the interpolation of medicine and the work such as judgement of clean endpoint.
5, cleaning performance is good, and after cleaning, the color of filter element is rendered as the initial white of filter element, and after cleaning, equipment can continue good operation.First the present invention utilizes alkali cleaning to remove the greasy dirt on filter element surface and loose deposit, second step is to utilize pickling to remove the pollutants such as corrosion product and silt, and emit after pollutant is dissolved, and can continue good operation by assurance equipment after Chemical cleaning.Meanwhile, the present invention can reduce the frequency of quick-fried film, plastic film mulch, thereby reduces the operating cost of unit, is to realize the important technique measure that Energy-saving for Thermal Power Units reduces discharging.
In sum, system architecture of the present invention is simple, reasonable in design, control easy and input cost is low, cleaning method step is simple, cleaning performance good, and after cleaning, the color of filter element is rendered as the initial white of filter element.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of condensed water precision processing system that the present invention adopts.
Fig. 2 is the method flow block diagram of the present invention when the filter filter element of condensed water precision processing system is carried out to Chemical cleaning.
Description of reference numerals:
1-powdex; 2-condensate water inlet channel; The female pipe of 3-condensate water import;
4-condensate water outlet conduit; The female pipe of 5-condensate water outlet; 6-bypass duct;
7-keeps pump pipe laying; 8-keeps pump; 9-compressed air input channel;
10-pipeline control valve one; 11-backwash water inlet channel; 12-backwash water pump;
14-pipeline control valve two; 15-waste liquid recovery pond; 16-overflow pipe one;
17-overflow pipe two; 18-collecting pit; 19-plastic film mulch case;
20-plastic film mulch injection pipeline; 21-plastic film mulch syringe pump; 22-pipeline control valve five;
23-plastic film mulch pipeline; 24-plastic film mulch pump; 25-pipeline control valve six;
26-water inlet pipe one; 27-water inlet pipe two; 29-circulating line;
30-pipeline control valve eight; 31-heating steam input channel one;
32-heating steam input channel two; 33-pipeline control valve nine;
34-pipeline control valve ten; 35-compressed air storage tank; 36-mixed with resin case;
37-circulation line.
The specific embodiment
A kind of condensed water precision processing system as shown in Figure 1, comprises powdex 1 and the plastic film mulch device, compressed air input unit, backwash water input unit and waste collection and the tapping equipment that join with powdex 1 respectively.Described plastic film mulch device comprises mixed with resin case 2 and plastic film mulch case 19, the discharging opening of described mixed with resin case 2 joins by plastic film mulch injection pipeline 20 and the discharging opening of plastic film mulch case 19, plastic film mulch syringe pump 21 and pipeline control valve 5 22 are housed on plastic film mulch injection pipeline 20, the discharging opening of plastic film mulch case 19 joins by plastic film mulch pipeline 23 and the import of powdex 1, and the outlet of powdex 1 is joined by circulation line 37 and the charging aperture of plastic film mulch case 19, and plastic film mulch pump 24 and pipeline control valve 6 25 are housed on described plastic film mulch pipeline 23.Described backwash water inlet channel 11 passes into mixed with resin case 36 and plastic film mulch case 19 by water inlet pipe 1 and water inlet pipe 2 27 respectively, in described mixed with resin case 36 and plastic film mulch case 19, be respectively arranged with heating steam input channel 1 and heating steam input channel 2 32, heating steam input channel 1 and heating steam input channel 2 32 all join with heating steam generation equipment, and heating steam input channel 1 and heating steam input channel 2 32 are equipped with respectively pipeline control valve 9 33 and pipeline control valve 10.Described plastic film mulch case 19, plastic film mulch pipeline 23, plastic film mulch pump 24, powdex 1 and circulation line 37 form the plastic film mulch circulatory system, and described mixed with resin case 36, plastic film mulch injection pipeline 20 and plastic film mulch syringe pump 21 form the notes film system of carrying out plastic film mulch to the described plastic film mulch circulatory system.On described mixed with resin case 36 and plastic film mulch case 19, be connected to respectively the overflow pipe 1 and the overflow pipe 2 17 that lead in collecting pit 18.
The import of described powdex 1 is joined by the female pipe 3 of condensate water inlet channel 2 and condensate water import, and the outlet of powdex 1 is joined by condensate water outlet conduit 4 and the female pipe 5 of condensate water outlet, between the female pipe 3 of described condensate water import and the female pipe 5 of condensate water outlet, be connected on bypass duct 6 and bypass duct 6 bypass valve is housed, between the outlet of powdex 1 and import, be connected to and keep pump pipe laying 7 and keep being equipped with and keeping pump 8 on pump pipe laying 7.In the present embodiment, the powdex 1 adopting and structure and the operation principle of peripheral pipeline thereof are all identical with existing powdex.
Described compressed air input unit, for the compressed air storage tank 35 that the air inlet by compressed air input channel 9 and powdex 1 joins, is provided with pipeline control valve 1 on described compressed air input channel 9.Described backwash water input unit comprises backwash water inlet channel 11 and is arranged on the backwash water pump 12 on backwash water inlet channel 11, backwash water inlet channel 11 join with condensate water outlet conduit 4 and backwash water inlet channel 11 on pipeline control valve 2 14 is housed.Described waste collection and tapping equipment comprise waste liquid recovery pond 15 and be connected in powdex 1 and waste liquid recovery pond 15 between discharging of waste liquid pipeline, and on described discharging of waste liquid pipeline, blowdown control valve is housed.
In the present embodiment, the outlet of described plastic film mulch syringe pump 21 passes into mixed with resin case 36 by circulating line 29, and on circulating line 29, pipeline control valve 8 30 is housed.
Because the utility model alkali cleaning medicine used and pickling medicine are all solid medicines, only rely on the agitator in mixed with resin case 36 to carry out even medicine, consuming time longer, therefore install a circulating line 29 additional, can help fast the fixedly dissolving of medicine.
During actual use, the flow of described heating steam input channel 1 and 2 32 interior the inputted heating steams of heating steam input channel is 20t/h ± 5t/h, and the temperature of heating steam input channel 1 and 2 32 interior the inputted heating steams of heating steam input channel is 0.8MPa ± 0.2MPa higher than 200 ℃ and its pressure.
During actual use, heating steam input channel 1 and heating steam input channel 2 32 are for being laid in respectively the interim steam pipeline (trace) in mixed with resin case 36 and plastic film mulch case 19, the effect of heating steam input channel 1 and heating steam input channel 2 32 is mainly when setting up simulation loop before carrying out Chemical cleaning, can improve in time, fast the cleaning temperature of precision processing system.Wherein, the steam parameter of heating steam input channel 1 and heating steam input channel 2 32 is controlled at: flow 20t/h, 200 ℃ of >, 0.8MPa.
In actual use procedure, if overflow pipe 2 17 design heights of plastic film mulch case 19 are lower than the height of powdex 1 exhaust valve, likely there is the not situation of full water of system, thereby on overflow pipe 2 17, install a pipe control valve (or restricting orifice) additional.
In the present embodiment, the quantity of described powdex 1 is two, the quantity of described plastic film mulch device, compressed air input unit, backwash water input unit and waste collection and tapping equipment is one, and two described powdexs 1 share a described plastic film mulch device, share a described compressed air input unit, share a described backwash water input unit and share a described waste collection and tapping equipment.
And in the present embodiment, the structure of described compressed air input unit, backwash water input unit and waste collection and the tapping equipment adopting is all identical with existing condensed water precision processing system with operation principle.To sum up, what condensed water precision processing system that the present invention adopts was used is medium voltage network, and condensate water directly enters powdex 1 after solidifying pump, then through low adding, enters oxygen-eliminating device.Every unit adopts is that 2 * 100% condensate fine is processed with powdex 1, and 100% bypass duct 6 is set, every unit arranges a set of plastic film mulch device, two unit common compression air input units, backwash water input unit and waste collection and tapping equipments.
The filter filter element of a kind of condensed water precision processing system is as shown in Figure 2 carried out the method for Chemical cleaning, comprises the following steps:
Step 1, alkali cleaning, its alkaline cleaning procedure is as follows:
101, quick-fried film backwash: according to quick-fried film and the back-flushing method of conventional powdex, and by described compressed air input unit and described backwash water input unit, powdex 1 is carried out to quick-fried film and backwash.
Thereby, in step 1, first dropping into and program control powdex 1 is carried out to quick-fried film backwash, the resin etc. of removing powdex 1 filter element surface completely filters foreign material.
102, filter filling up water is standby: by described backwash water input unit, to standby after the interior filling up water of powdex 1.
In the present embodiment, specifically utilize backwash water pump 12, the pipeline in powdex 1 and the plastic film mulch circulatory system is carried out to full water, drop into again afterwards the program control plastic film mulch circulation of setting up.
103, clean and to make of alkali wash water: by described backwash water input unit to the interior notes demineralized water of mixed with resin case 36, alkali cleaning medicine is dropped in mixed with resin case 36 simultaneously, and by the interior set agitator of mixed with resin case 36, added alkali cleaning medicine is mixed to formation alkali wash water with demineralized water; In described alkali wash water whipping process, by heating steam input channel 1, in mixed with resin case 36, pass into heating steam the temperature of described alkali wash water is maintained to 50 ℃ ± 5 ℃, by heating steam input channel 2 32, in plastic film mulch case 19, pass into heating steam so that plastic film mulch case 19 internal temperatures are maintained to 50 ℃ ± 5 ℃ simultaneously; The conventional alkali cleaning medicine of described alkali cleaning medicine for powdex 1 is cleaned.
In actual mechanical process, first to the interior injected water of mixed with resin case 36, then add interim heating steam, the plastic film mulch circulatory system is warming up to 50 ℃ of left and right, then add alkali cleaning medicine and synchronous turn on agitator in mixed with resin case 36, stir.Because the Main Function of alkali cleaning medicine is to remove iron in condensate water, greasy dirt, grain slag etc., thereby adopt NaOH and two kinds of medicaments of sodium hydrogen phosphate to carry out composite cleaning.The object that plastic film mulch case 19 internal temperatures is maintained to 50 ℃ ± 5 ℃ is to guarantee, in plastic film mulch circulation, the temperature of described alkali wash water to be maintained to 50 ℃ ± 5 ℃.
104, plastic film mulch wash cycles: according to the plastic film mulch method of conventional powdex, by the described plastic film mulch circulatory system, setting up plastic film mulch circulates, and in plastic film mulch cyclic process, by the alkali wash water described in step 103, the described plastic film mulch circulatory system is carried out to wash cycles, the wash cycles time is 8 hours～10 hours; In plastic film mulch cyclic process, by described notes film system, continue to inject described alkali wash water in the described plastic film mulch circulatory system.
Actual while carrying out plastic film mulch wash cycles, start the 21 rear beginnings of plastic film mulch syringe pump and add alkali wash water and carry out wash cycles to the plastic film mulch circulatory system; Now, owing to constantly the plastic film mulch circulatory system being added to alkali wash water, thereby unnecessary liquid will flow out by the overflow pipe 2 17 by plastic film mulch case 19, until all entering the plastic film mulch circulatory system, cleans alkali wash water, in this process, control the water level of the plastic film mulch circulatory system well.
105, oscillation cleaning, its cleaning process is as follows:
1051, oscillation cleaning for the first time: the air pressure of opening compressed air storage tank 35 is adjusted valve, until the air pressure of compressed air storage tank 35 interior Compressed Gas is adjusted to 0.4MPa ± 0.05MPa; Meanwhile, open air bleeding valve and the blowdown control valve of powdex 1, until the water level in powdex 1 is adjusted to sight glass one middle part, complete oscillation cleaning process for the first time.
1052, oscillation cleaning for the second time: the air pressure of opening compressed air storage tank 35 is adjusted valve, until the air pressure of compressed air storage tank 35 interior Compressed Gas is adjusted to 0.4MPa ± 0.05MPa; Meanwhile, open air bleeding valve and the blowdown control valve of powdex 1, the water level in powdex 1 is adjusted to sight glass two middle parts, complete oscillation cleaning process for the second time.
1053, oscillation cleaning for the third time: the air pressure of opening compressed air storage tank 35 is adjusted valve, until the air pressure of compressed air storage tank 35 interior Compressed Gas is adjusted to 0.4MPa ± 0.05MPa; Meanwhile, open air bleeding valve and the blowdown control valve of powdex 1, the water level in powdex 1 is adjusted to sight glass three middle parts, complete oscillation cleaning process for the third time;
Described sight glass one, sight glass two and sight glass three are for being laid in three sight glass on powdex 1 from top to bottom.
106, however, residual base washing lotion is cleaned: first put the clean described plastic film mulch circulatory system and the intrasystem all liq solution of described notes film, by described backwash water input unit, powdex 1 is carried out to backwash until go out clarification of water again, then by the described plastic film mulch circulatory system, set up plastic film mulch and circulate, and in plastic film mulch cyclic process, the demineralized water by described backwash water input unit input carries out wash cycles until water outlet is clean to the described plastic film mulch circulatory system; In plastic film mulch cyclic process, by described notes film system, continue to inject demineralized water in the described plastic film mulch circulatory system.
201, filter filling up water is standby: by described backwash water input unit, to standby after the interior filling up water of powdex 1.
202, clean and make of pickle: citric acid crystal is added in mixed with resin case 36, and by the interior set agitator of mixed with resin case 36, added citric acid crystal is mixed to formation citric acid solution with demineralized water; In described citric acid solution whipping process, by heating steam input channel 1, in mixed with resin case 36, pass into heating steam the temperature of described citric acid solution is maintained to 75 ℃～85 ℃, by heating steam input channel 2 32, in plastic film mulch case 19, pass into heating steam so that plastic film mulch case 19 internal temperatures are maintained to 50 ℃ ± 5 ℃ simultaneously.The object that plastic film mulch case 19 internal temperatures is maintained to 50 ℃ ± 5 ℃ is to guarantee, in plastic film mulch circulation, the temperature of described citric acid solution to be maintained to 50 ℃ ± 5 ℃.
Actual add citric acid crystal before, first the liquid level in mixed with resin case 36 is down to low liquid level, then adds citric acid crystal.Generally, the design temperature of powdex 1 is 85 ℃, and running temperature is controlled≤75 ℃, and the cleaning temperature general control of citric acid is at 90 ℃～98 ℃, thereby the citric acid cleaning temperature of powdex 1 is controlled at 75 ℃～85 ℃.
203, plastic film mulch wash cycles: according to the plastic film mulch method of conventional powdex, by the described plastic film mulch circulatory system, setting up plastic film mulch circulates, and in plastic film mulch cyclic process, by the citric acid solution described in step 202, the described plastic film mulch circulatory system is carried out to wash cycles, the wash cycles time is 6 hours～8 hours; In plastic film mulch cyclic process, by described notes film system, continue to inject described citric acid solution in the described plastic film mulch circulatory system, and when injecting described citric acid solution, in described citric acid solution, add continuously ammoniacal liquor so that the pH value of described citric acid solution is maintained to 3.5～4.0.
204, oscillation cleaning: to the vibration cleaning method described in step 1053, complete oscillation cleaning process three times according to step 1051.
205, remaining pickle cleans: first put the clean described plastic film mulch circulatory system and the intrasystem all liq solution of described notes film, by described backwash water input unit, powdex 1 is carried out to backwash until go out clarification of water again, then by the described plastic film mulch circulatory system, set up plastic film mulch and circulate, and in plastic film mulch cyclic process, the demineralized water by described backwash water input unit input carries out wash cycles until water outlet is clean to the described plastic film mulch circulatory system; In plastic film mulch cyclic process, by described notes film system, continue to inject demineralized water in the described plastic film mulch circulatory system.
In the present embodiment, described in step 202 citric acid crystal is added in mixed with resin case 36 before, also need to add citric acid corrosion inhibiter in mixed with resin case 36.And described citric acid corrosion inhibiter is that mass concentration is 0.3% citric acid corrosion inhibiter.
In actual cleaning process, what all adopt due to the filter filter element of powdex 1 and the material of bottom is 316 stainless steels, surrounding all has line with rubber, thereby also can not add corrosion inhibiter, but for the use safety of precision processing system, in the present embodiment, still to add mass concentration be 0.3% citric acid corrosion inhibiter and add the plastic film mulch circulatory system by plastic film mulch syringe pump 21.
In the present embodiment, the alkali cleaning medicine described in step 103 is NaOH powder and Na
2hPO
4powder, wherein the mass percent of NaOH powder and described alkali wash water is 0.5%～0.8%, Na
2hPO
4the mass percent of powder and described alkali wash water is 0.2%～0.5%.
In the present embodiment, in step 1051, step 1052 and step 1053, all the air pressure of compressed air storage tank 35 interior Compressed Gas is adjusted to 0.4MPa.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification of above embodiment being done according to the technology of the present invention essence, change and equivalent structure change, and all still belong in the protection domain of technical solution of the present invention.
Claims (10)
1. a condensed water precision processing system, comprises powdex (1) and the plastic film mulch device, compressed air input unit, backwash water input unit and waste collection and the tapping equipment that join with powdex (1) respectively, it is characterized in that: described plastic film mulch device comprises mixed with resin case (36) and plastic film mulch case (19), the discharging opening of described mixed with resin case (36) joins by plastic film mulch injection pipeline (20) and the discharging opening of plastic film mulch case (19), plastic film mulch syringe pump (21) and pipeline control valve five (22) are housed on plastic film mulch injection pipeline (20), the discharging opening of plastic film mulch case (19) joins by plastic film mulch pipeline (23) and the import of powdex (1), and the outlet of powdex (1) is joined by circulation line (37) and the charging aperture of plastic film mulch case (19), plastic film mulch pump (24) and pipeline control valve six (25) are housed on described plastic film mulch pipeline (23), backwash water inlet channel (11) passes into mixed with resin case (36) and plastic film mulch case (19) by water inlet pipe one (26) and water inlet pipe two (27) respectively, in described mixed with resin case (36) and plastic film mulch case (19), be respectively arranged with heating steam input channel one (31) and heating steam input channel two (32), heating steam input channel one (31) and heating steam input channel two (32) all join with heating steam generation equipment, and heating steam input channel one (31) and heating steam input channel two (32) are equipped with respectively pipeline control valve nine (33) and pipeline control valve ten (34), described plastic film mulch case (19), plastic film mulch pipeline (23), plastic film mulch pump (24), powdex (1) and circulation line (37) form the plastic film mulch circulatory system, and described mixed with resin case (36), plastic film mulch injection pipeline (20) and plastic film mulch syringe pump (21) form notes film system from film to the described plastic film mulch circulatory system that note.
2. according to a kind of condensed water precision processing system claimed in claim 1, it is characterized in that: the outlet of described plastic film mulch syringe pump (21) passes into mixed with resin case (36) by circulating line (29), and on circulating line (29), pipeline control valve eight (30) is housed.
3. according to a kind of condensed water precision processing system described in claim 1 or 2, it is characterized in that: in described heating steam input channel one (31) and heating steam input channel two (32), the flow of the heating steams of inputting is 20t/h ± 5t/h, the temperature of heating steam input channel one (31) and two (32) the interior heating steams of inputting of heating steam input channel is 0.8MPa ± 0.2MPa higher than 200 ℃ and its pressure.
4. according to a kind of condensed water precision processing system described in claim 1 or 2, it is characterized in that: the quantity of described powdex (1) is two, the quantity of described plastic film mulch device, compressed air input unit, backwash water input unit and waste collection and tapping equipment is one, and two described powdexs (1) share a described plastic film mulch device, share a described compressed air input unit, share a described backwash water input unit and share a described waste collection and tapping equipment.
5. the filter filter element of condensed water precision processing system is as claimed in claim 1 carried out to a method for Chemical cleaning, it is characterized in that the method comprises the following steps:
Step 1, alkali cleaning, its alkaline cleaning procedure is as follows:
101, quick-fried film backwash: according to quick-fried film and the back-flushing method of conventional powdex, and by described compressed air input unit and described backwash water input unit, powdex (1) is carried out to quick-fried film and backwash;
102, filter filling up water is standby: by described backwash water input unit, to standby after the interior filling up water of powdex (1);
103, clean and make of alkali wash water: by described backwash water input unit, in mixed with resin case (36), note demineralized water, alkali cleaning medicine is dropped in mixed with resin case (36) simultaneously, and by set agitator in mixed with resin case (36), added alkali cleaning medicine is mixed to formation alkali wash water with demineralized water; In described alkali wash water whipping process, by heating steam input channel one (31), in mixed with resin case (36), pass into heating steam the temperature of described alkali wash water is maintained to 50 ℃ ± 5 ℃, by heating steam input channel two (32), in plastic film mulch case (19), pass into heating steam so that plastic film mulch case (19) internal temperature is maintained to 50 ℃ ± 5 ℃ simultaneously; The conventional alkali cleaning medicine of described alkali cleaning medicine for powdex (1) is cleaned;
104, plastic film mulch wash cycles: according to the plastic film mulch method of conventional powdex, by the described plastic film mulch circulatory system, setting up plastic film mulch circulates, and in plastic film mulch cyclic process, by the alkali wash water described in step 103, the described plastic film mulch circulatory system is carried out to wash cycles, the wash cycles time is 8 hours～10 hours; In plastic film mulch cyclic process, by described notes film system, continue to inject described alkali wash water in the described plastic film mulch circulatory system;
105, oscillation cleaning, its cleaning process is as follows:
1051, oscillation cleaning for the first time: the air pressure of opening compressed air storage tank (35) is adjusted valve, until the air pressure of the interior Compressed Gas of compressed air storage tank (35) is adjusted to 0.4MPa ± 0.05MPa; Meanwhile, open air bleeding valve and the blowdown control valve of powdex (1), until the water level in powdex (1) is adjusted to sight glass one middle part, complete oscillation cleaning process for the first time;
1052, oscillation cleaning for the second time: the air pressure of opening compressed air storage tank (35) is adjusted valve, until the air pressure of the interior Compressed Gas of compressed air storage tank (35) is adjusted to 0.4MPa ± 0.05MPa; Meanwhile, open air bleeding valve and the blowdown control valve of powdex (1), the water level in powdex (1) is adjusted to sight glass two middle parts, complete oscillation cleaning process for the second time;
1053, oscillation cleaning for the third time: the air pressure of opening compressed air storage tank (35) is adjusted valve, until the air pressure of the interior Compressed Gas of compressed air storage tank (35) is adjusted to 0.4MPa ± 0.05MPa; Meanwhile, open air bleeding valve and the blowdown control valve of powdex (1), the water level in powdex (1) is adjusted to sight glass three middle parts, complete oscillation cleaning process for the third time;
Described sight glass one, sight glass two and sight glass three are for being laid in three sight glass on powdex (1) from top to bottom;
106, however, residual base washing lotion is cleaned: first put the clean described plastic film mulch circulatory system and the intrasystem all liq solution of described notes film, by described backwash water input unit, powdex (1) is carried out to backwash until go out clarification of water again, then by the described plastic film mulch circulatory system, set up plastic film mulch and circulate, and in plastic film mulch cyclic process, the demineralized water by described backwash water input unit input carries out wash cycles until water outlet is clean to the described plastic film mulch circulatory system; In plastic film mulch cyclic process, by described notes film system, continue to inject demineralized water in the described plastic film mulch circulatory system;
Step 2, pickling, its acid cleaning process is as follows:
201, filter filling up water is standby: by described backwash water input unit, to standby after the interior filling up water of powdex (1);
202, clean and make of pickle: citric acid crystal is added in mixed with resin case (36), and by set agitator in mixed with resin case (36), added citric acid crystal is mixed to formation citric acid solution with demineralized water; In described citric acid solution whipping process, by heating steam input channel two (32), in mixed with resin case (36), pass into heating steam the temperature of described citric acid solution is maintained to 75 ℃～85 ℃, by heating steam input channel two (32), in plastic film mulch case (19), pass into heating steam so that plastic film mulch case (19) internal temperature is maintained to 50 ℃ ± 5 ℃ simultaneously;
203, plastic film mulch wash cycles: according to the plastic film mulch method of conventional powdex, by the described plastic film mulch circulatory system, setting up plastic film mulch circulates, and in plastic film mulch cyclic process, by the citric acid solution described in step 202, the described plastic film mulch circulatory system is carried out to wash cycles, the wash cycles time is 6 hours～8 hours; In plastic film mulch cyclic process, by described notes film system, continue to inject described citric acid solution in the described plastic film mulch circulatory system, and when injecting described citric acid solution, in described citric acid solution, add continuously ammoniacal liquor so that the pH value of described citric acid solution is maintained to 3.5～4.0;
204, oscillation cleaning: to the vibration cleaning method described in step 1053, complete oscillation cleaning process three times according to step 1051;
205, remaining pickle cleans: first put the clean described plastic film mulch circulatory system and the intrasystem all liq solution of described notes film, by described backwash water input unit, powdex (1) is carried out to backwash until go out clarification of water again, then by the described plastic film mulch circulatory system, set up plastic film mulch and circulate, and in plastic film mulch cyclic process, the demineralized water by described backwash water input unit input carries out wash cycles until water outlet is clean to the described plastic film mulch circulatory system; In plastic film mulch cyclic process, by described notes film system, continue to inject demineralized water in the described plastic film mulch circulatory system.
6. according to chemical cleaning method claimed in claim 5, it is characterized in that: described in step 202 citric acid crystal is added in mixed with resin case (36) before, also need to add citric acid corrosion inhibiter in mixed with resin case (36).
7. according to chemical cleaning method claimed in claim 6, it is characterized in that: described citric acid corrosion inhibiter is that mass concentration is 0.3% citric acid corrosion inhibiter.
8. according to the chemical cleaning method described in claim 5,6 or 7, it is characterized in that: the alkali cleaning medicine described in step 103 is NaOH powder and Na
2hPO
4powder, wherein the mass percent of NaOH powder and described alkali wash water is 0.5%～0.8%, Na
2hPO
4the mass percent of powder and described alkali wash water is 0.2%～0.5%.
9. according to the chemical cleaning method described in claim 5,6 or 7, it is characterized in that: the mass percent of the crystal of citric acid described in step 202 and described citric acid solution is 2%～4%.
10. according to the chemical cleaning method described in claim 5,6 or 7, it is characterized in that: in step 1051, step 1052 and step 1053, all the air pressure of the interior Compressed Gas of compressed air storage tank (35) is adjusted to 0.4MPa.
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| CN105999876A (en) * | 2016-06-29 | 2016-10-12 | 西安利能科技有限责任公司 | Non-detachable chemical washing method for powder resin covered filter element and detergent |
| CN108303050B (en) * | 2018-01-18 | 2024-02-09 | 中国电力科学研究院有限公司 | Resin insulation type current transformer iron core nondestructive extraction device and method |
| CN110760389A (en) * | 2019-10-21 | 2020-02-07 | 河北冀研能源科学技术研究院有限公司 | Chemical cleaning agent for filter element of pre-filter of condensate polishing system and application |
| CN110980822A (en) * | 2019-11-20 | 2020-04-10 | 中国能源建设集团西北电力试验研究院有限公司 | Automatic cleaning system for powder resin covered filter and program control method |
| CN113105027B (en) * | 2021-05-10 | 2022-11-04 | 华北电力科学研究院有限责任公司 | Precision processing device and method for ultra-supercritical direct air cooling unit |
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