CN113082839A - On-line cleaning method for covering filter - Google Patents
On-line cleaning method for covering filter Download PDFInfo
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- CN113082839A CN113082839A CN202110269145.1A CN202110269145A CN113082839A CN 113082839 A CN113082839 A CN 113082839A CN 202110269145 A CN202110269145 A CN 202110269145A CN 113082839 A CN113082839 A CN 113082839A
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- filter
- cleaning
- rinsing
- agent
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- 238000004140 cleaning Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 238000005406 washing Methods 0.000 claims abstract description 30
- 239000002253 acid Substances 0.000 claims abstract description 26
- 239000012528 membrane Substances 0.000 claims abstract description 20
- 238000007689 inspection Methods 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000005237 degreasing agent Methods 0.000 claims description 25
- 239000013527 degreasing agent Substances 0.000 claims description 25
- 239000002699 waste material Substances 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 239000003638 chemical reducing agent Substances 0.000 claims description 16
- 238000005260 corrosion Methods 0.000 claims description 15
- 230000007797 corrosion Effects 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 239000012459 cleaning agent Substances 0.000 claims description 13
- 238000005554 pickling Methods 0.000 claims description 13
- 230000007480 spreading Effects 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- 239000003112 inhibitor Substances 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 230000002378 acidificating effect Effects 0.000 claims description 4
- 238000005238 degreasing Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 12
- 239000003513 alkali Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000004880 explosion Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 4
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 4
- 229910001447 ferric ion Inorganic materials 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000012487 rinsing solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 235000013980 iron oxide Nutrition 0.000 description 3
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 3
- 230000003472 neutralizing effect Effects 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910001448 ferrous ion Inorganic materials 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/12—Devices for taking out of action one or more units of multi- unit filters, e.g. for regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/04—Controlling the filtration
-
- 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
Abstract
The invention discloses an online cleaning method for a covering filter, which comprises an isolation system, a membrane explosion, appearance inspection before cleaning, alkali washing, rinsing, acid washing, rinsing, liquid discharging and appearance inspection, wherein a membrane laying box is used for online cleaning of a filtering element of the covering filter, so that the workload of a maintenance team is reduced, and the safety of equipment is ensured. Importantly, through the online cleaning process, the filter element of the filter does not need to be disassembled and assembled, and the service life of the unit is prolonged. From the safety of the process, the filter is at normal pressure during on-line cleaning, the condensed water is at medium pressure, even if the valve leaks internally, the condensed water leaks to the fine treatment, and the cleaning liquid cannot enter a thermodynamic system, so that the method is safe and reliable. The on-line cleaning time is short, the rinsing is carried out after the cleaning, a dead-angle-free rinsing method is adopted until the quality of the rinsing liquid reaches the quality equal to that of condensed water, the cleaning effect is good, the cleaning cost is reduced, and the problems in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of cleaning of thermal power plant equipment, in particular to an on-line cleaning method for a coverage filter.
Background
An air cooling unit of a thermal power plant is important equipment in the power plant, pollution and blockage can be continuously caused when a filter element of a covering filter is operated for a long time, and the quality of water iron after the filter exceeds the standard for a long time. .
The water-steam contact heat exchange surface area of the direct air cooling unit is large, the content of corrosion products of iron in condensed water is high, in the water-steam circulation process, most corrosion products in the condensed water are iron oxides, and due to load change in operation, the corrosion products in a steam-water pipeline fall off, so that the content of metal oxides is increased. Therefore, the filter element of the filter can be polluted and blocked in the operation of the filter all the year round. In order to ensure the healthy operation of the covering filter and the timely removal of the trapped iron, an off-line cleaning method is adopted, particularly, a filter element needs to be detached, a special container is used for cleaning, the filter element needs to be installed after cleaning, the workload of overhaul and maintenance personnel is increased, and the cleaning cost is extremely high. And no matter dismantle or install not only consuming time and wasting force, if the installation is improper moreover, leak resin powder and fibre powder very easily, will threaten unit safety operation directly, shorten unit life.
Therefore, the prior art for cleaning the filter element is off-line cleaning, and has the following problems: the cleaning work consumes time and labor, resin and fiber powder are easy to leak, the service life of the unit is shortened, the workload is large, and the cleaning cost is high.
Disclosure of Invention
In order to solve the technical problems, the invention provides an on-line cleaning method for a covering filter, which is used for thoroughly cleaning corrosion products in the filter by the on-line cleaning method.
In order to achieve the purpose, the invention is realized by the following technical scheme:
an on-line cleaning method for a covering filter comprises the following specific steps:
s110, isolating a system: and opening the fine treatment bypass valve, the pneumatic valve and the manual valve in sequence, isolating the filter, and closing each water quality sampling valve.
S120, exploding a membrane: removing the resin film on the surface of the filter element of the filter.
S130, appearance inspection before cleaning: and opening a manhole at the top of the filter, and checking and recording the state of the filter element before cleaning.
S140, alkaline washing: and (3) injecting condensed water into the filter, spreading the membrane to form a membrane spreading box, adding an alkaline degreasing agent into the membrane spreading box, conveying the alkaline degreasing agent into the filter, switching circulation, and soaking for degreasing.
S150, rinsing: and discharging the alkaline degreasing agent in the filter, and injecting condensed water into the filter for rinsing.
S160, acid washing: after rinsing, adding an acid cleaning agent, an iron and corrosion inhibitor and a high-efficiency reducing agent into the film paving box to form a pickling solution, starting an injection pump to convey the pickling solution into a filter, and carrying out pickling.
S170, rinsing: firstly, top discharge rinsing is carried out, then bottom discharge rinsing is carried out, condensed water is mixed in the middle for rinsing, PH is adjusted, a waste liquid treating agent is added, and waste liquid generated by acid washing is neutralized.
S180 liquid drainage: the outlet valve of the filter is opened to discharge the waste liquid.
S190, appearance inspection: and opening a manhole at the top of the filter, checking and recording the condition of the filter element, comparing the condition with the condition of the filter element before cleaning, and recording the clean condition of the cleaned appearance.
Compared with the prior art, the invention has the following advantages: and the membrane laying box is utilized to carry out on-line cleaning on the filter element of the covering filter, thereby not only reducing the workload of maintenance teams, but also ensuring the safety of equipment. Importantly, through the online cleaning process, the filter element of the filter does not need to be disassembled and assembled, and the service life of the unit is prolonged. From the safety of the process, the filter is at normal pressure during on-line cleaning, the condensed water is at medium pressure, even if the valve leaks internally, the condensed water leaks to the fine treatment, and the cleaning liquid cannot enter a thermodynamic system, so that the method is safe and reliable. The on-line cleaning time is short, the rinsing is carried out after the cleaning, a dead-angle-free rinsing method is adopted until the quality of the rinsing liquid reaches the quality equal to that of condensed water, the cleaning effect is good, the cleaning cost is reduced, and the problems in the prior art are solved.
More preferably: the step S110 of isolating the filter includes the following steps:
s210, closing a manual water inlet valve and an automatic water inlet valve of the filter.
S220, closing a manual water outlet valve and an automatic water outlet valve of the filter.
By adopting the technical scheme, the filter is isolated from the process system, the whole filter is cleaned independently, the filter element for disassembling the filter is omitted, the working time is shortened, and the workload is reduced.
More preferably: and (3) exploding the membrane in the step S120, wherein each filter element is exploded for at least 2 times.
By adopting the technical scheme, the pretreatment work is well done for carrying out thorough alkali washing or acid washing on the filter element subsequently.
More preferably: the step S140 of alkaline washing comprises the following specific steps:
s410, starting a condensate pump to inject condensate into the filter.
And S420, when the temperature in the filter is within the cleaning temperature range, closing the condensate pump, and performing film laying circulation to form film laying circulation.
S430, adding an alkaline degreasing agent into the film spreading box.
S440, opening a syringe pump, and conveying the alkaline degreasing agent into the filter through the syringe pump.
And S450, after the conveying of the alkaline degreasing agent is finished, stopping the injection pump, closing a valve between the injection pump and the film paving box, and opening a valve between an inlet of the injection pump and the filter.
S460, starting the injection pump, and circulating alkali washing between the filter and the injection pump.
S470, stopping the injection pump and soaking.
By adopting the technical scheme, the filter element in the filter is subjected to alkaline corrosion for the first time through circulating alkaline washing and soaking, so that iron oxides and oil stains blocked on the filter element are corroded from the filter element.
The method is further optimized as follows: the alkaline degreasing agent is LN-5 alkaline degreasing agent.
By adopting the technical scheme, the oil stains in the filter and on the filter element are efficiently removed.
The method is further optimized as follows: LN-LYQXJ acid cleaning agent is selected as the acid cleaning agent.
By adopting the technical scheme, the LN-LYQXJ acidic cleaning agent is selected to be capable of neutralizing residual liquid remained in the filter and on the filter element after alkaline cleaning, a first rinsing solution is formed during rinsing after the alkaline cleaning is finished, and the LN-LYQXJ acidic cleaning agent is selected to be capable of neutralizing alkalinity in the first rinsing solution, so that waste liquid discharged from the filter is neutral, and pollution to the environment is reduced.
The method is further optimized as follows: the deironing cleaning corrosion inhibitor is LN-246 deironing cleaning corrosion inhibitor.
By adopting the technical scheme, the smoothness of the inner surface of the filter and the surface of the filter element is improved.
The method is further optimized as follows: the high-efficiency reducing agent is LN-GHJ high-efficiency reducing agent.
By adopting the technical scheme, after the LN-GHJ efficient reducing agent is added into the pickling solution, ferric ions in the cleaning solution can be quickly and effectively reduced into ferrous ions in a short time, even the ferric ions are reduced to 0, the efficiency of the reducing agent is higher than that of hydrazine and other reducing agents, the reaction temperature requirement is low, and the pickling effect is kept good.
The method is further optimized as follows: the waste liquid treating agent is LN-CAI waste liquid treating agent.
By adopting the technical scheme, the waste liquid generated after acid washing is neutralized.
Drawings
FIG. 1 is a block diagram of a method flow of the present embodiment;
FIG. 2 is a block diagram showing a flow of the isolation filter according to the present embodiment;
FIG. 3 is a block diagram of the alkaline cleaning process in this example.
Detailed Description
The present invention will be described in further detail below with reference to fig. 1, 2 and 3.
An on-line cleaning method for a covering filter comprises the following specific steps:
s110, isolating a system: and opening the fine treatment bypass valve, the pneumatic valve and the manual valve in sequence, isolating the filter, and closing each water quality sampling valve.
S120, exploding a membrane: removing the resin film on the surface of the filter element of the filter.
S130, appearance inspection before cleaning: and opening a manhole at the top of the filter, and checking and recording the state of the filter element before cleaning.
S140, alkaline washing: and (3) injecting condensed water into the filter, spreading the membrane to form a membrane spreading box, adding an alkaline degreasing agent into the membrane spreading box, conveying the alkaline degreasing agent into the filter, switching circulation, and soaking for degreasing.
S150, rinsing: and discharging the alkaline degreasing agent in the filter, and injecting condensed water into the filter for rinsing.
S160, acid washing: after rinsing, adding an acid cleaning agent, an iron and corrosion inhibitor and a high-efficiency reducing agent into the film paving box to form a pickling solution, starting an injection pump to convey the pickling solution into a filter, and carrying out pickling.
S170, rinsing: firstly, top discharge rinsing is carried out, then bottom discharge rinsing is carried out, condensed water is mixed in the middle for rinsing, PH is adjusted, a waste liquid treating agent is added, and waste liquid generated by acid washing is neutralized.
S180 liquid drainage: the outlet valve of the filter is opened to discharge the waste liquid.
S190, appearance inspection: and opening a manhole at the top of the filter, checking and recording the condition of the filter element, comparing the condition with the condition of the filter element before cleaning, and recording the clean condition of the cleaned appearance.
Specifically, the isolating filter in step S110, as shown in fig. 2, includes the following specific steps:
s210, closing a manual water inlet valve and an automatic water inlet valve of the filter.
S220, closing a manual water outlet valve and an automatic water outlet valve of the filter.
Therefore, the filter is isolated from the process system, the whole filter is cleaned independently, the filter element for disassembling the filter is omitted, the working time is shortened, and the workload is reduced.
More preferably: and (3) exploding the membrane in the step S120, wherein each filter element is exploded for at least 2 times. The pretreatment work is well done for carrying out the subsequent alkaline washing or acid washing on the filter element.
Specifically, as shown in fig. 3, the step S140 of alkaline washing includes the following specific steps:
s410, starting a condensate pump to inject condensate into the filter.
And S420, when the temperature in the filter is within the cleaning temperature range, closing the condensate pump, and performing film laying circulation to form film laying circulation.
S430, adding an alkaline degreasing agent into the film spreading box.
S440, opening a syringe pump, and conveying the alkaline degreasing agent into the filter through the syringe pump.
And S450, after the conveying of the alkaline degreasing agent is finished, stopping the injection pump, closing a valve between the injection pump and the film paving box, and opening a valve between an inlet of the injection pump and the filter.
S460, starting the injection pump, and circulating alkali washing between the filter and the injection pump.
S470, stopping the injection pump and soaking.
Thus, the filter element in the filter is subjected to alkaline corrosion for the first time through circulating alkaline washing and soaking, so that iron oxides and oil stains blocked on the filter element are corroded from the filter element.
The alkaline degreasing agent is LN-5 alkaline degreasing agent, and oil stains in the filter and on the filter element are efficiently removed.
The acid cleaning agent is LN-LYQXJ acid cleaning agent which can neutralize residual liquid remained in the filter and on the filter element after alkaline cleaning, a first rinsing solution is formed when rinsing is carried out after the alkaline cleaning is finished, and the LN-LYQXJ acid cleaning agent which can neutralize alkalinity in the first rinsing solution can be used for neutralizing waste liquid discharged from the filter, so that the waste liquid is neutral, and the pollution to the environment is reduced.
The deironing cleaning corrosion inhibitor is LN-246, and can improve the smoothness of the filter inner surface and the surface of the filter element.
The high-efficiency reducing agent is LN-GHJ high-efficiency reducing agent, and after the LN-GHJ high-efficiency reducing agent is added into the pickling solution, ferric ions in the cleaning solution can be quickly and effectively reduced into ferrous ions in a short time, even the ferric ions are reduced to 0, the efficiency of the reducing agent is higher than that of hydrazine and other reducing agents, the requirement on reaction temperature is low, and the pickling effect is kept good.
LN-CAI waste liquid treating agent is selected as the waste liquid treating agent, and the waste liquid generated after acid washing is neutralized.
In conclusion, the membrane paving box is utilized to clean the filter elements of the covering filter on line, so that the workload of maintenance teams is reduced, and the safety of equipment is ensured. Importantly, through the online cleaning process, the filter element of the filter does not need to be disassembled and assembled, and the service life of the unit is prolonged. From the safety of the process, the filter is at normal pressure during on-line cleaning, the condensed water is at medium pressure, even if the valve leaks internally, the condensed water leaks to the fine treatment, and the cleaning liquid cannot enter a thermodynamic system, so that the method is safe and reliable. The on-line cleaning time is short, the rinsing is carried out after the cleaning, a dead-angle-free rinsing method is adopted until the quality of the rinsing liquid reaches the quality equal to that of condensed water, the cleaning effect is good, the cleaning cost is reduced, and the problems in the prior art are solved.
The following is an example of a powder resin covered filter, please refer to fig. 1, fig. 2 and fig. 3, and the detailed process of online cleaning is described in detail:
step 1, isolating the system: and (3) opening the precision treatment bypass valve, opening the pneumatic valve and the manual valve, closing the water inlet valve and the water outlet valve (comprising the manual valve and the automatic valve) of the 2 filters, and manually closing each water quality sampling valve.
Step 2, membrane explosion: the resin film on the surface of the filter element was removed and each canister was burst 2 times.
Step 3, appearance inspection before cleaning: and opening a manhole at the top, checking the condition of the filter element before cleaning, and comparing the appearance before and after cleaning.
Step 4, alkali washing: and (2) injecting condensed water into the filter to enable the temperature in the filter to reach the required cleaning temperature, then performing film laying circulation to ensure uniform temperature, adding 30kg of LN-5 alkali cleaning degreasing agent into a film laying box, reaching the inside of the filter tank through an injection pump, then continuously switching circulation, wherein the alkali cleaning time is 2 hours, then soaking, and sufficiently performing alkali cleaning degreasing.
Step 5, acid washing: and (3) carrying out system rinsing for 2 times after alkaline washing, injecting condensed water into the filter, adding 425kg of LN-LYQXJ filtering element acid cleaning agent, 50kg of LN-246 deironing cleaning corrosion inhibitor and 25kg of LN-GHJ efficient reducing agent into the film laying box when the temperature reaches, and continuously switching and circulating, wherein the whole acid washing process is 4 hours.
Step 6, rinsing: rinsing by using a large amount of backwashing water, wherein the rinsing method comprises top discharge rinsing, bottom discharge rinsing and condensed water rinsing, and finally adjusting the pH value until the conductivity is less than 5 mu s/cm and the iron content is less than 200ppb in an alkaline environment, and adding a waste liquid treatment agent LN-CAI425kg in the whole rinsing process to neutralize the waste liquid generated by acid washing.
Step 7, appearance inspection after cleaning: and opening a manhole at the top, checking the condition of the filter element, and checking the cleaned appearance.
The present embodiment is only for explaining the invention, and it is not limited to the invention, and those skilled in the art can make modifications to the embodiment as necessary without inventive contribution after reading the present specification, but all of them are protected by the patent law within the scope of the present invention.
Claims (9)
1. An on-line cleaning method for a covering filter is characterized in that: the method comprises the following specific steps:
s110, isolating a system: opening a fine treatment bypass valve, a pneumatic valve and a manual valve in sequence, isolating the filter, and closing each water quality sampling valve;
s120, exploding a membrane: removing the resin film on the surface of the filter element of the filter;
s130, appearance inspection before cleaning: opening a manhole at the top of the filter, and checking and recording the state of the filter element before cleaning;
s140, alkaline washing: injecting condensed water into the filter, spreading a membrane to form a membrane spreading box, adding an alkaline degreasing agent into the membrane spreading box, conveying the alkaline degreasing agent into the filter, switching circulation, and soaking for degreasing;
s150, rinsing: discharging the alkaline degreasing agent in the filter, and injecting condensed water into the filter for rinsing;
s160, acid washing: after the rinsing is finished, adding an acid cleaning agent, an iron and corrosion inhibitor and a high-efficiency reducing agent into a film paving box to form an acid pickling solution, starting an injection pump to convey the acid pickling solution into the filter, and carrying out acid pickling;
s170, rinsing: firstly, top discharge rinsing is carried out, then bottom discharge rinsing is carried out, condensed water is mixed in the middle for rinsing, the PH is adjusted, a waste liquid treatment agent is added, and the waste liquid generated by acid washing is neutralized;
s180 liquid drainage: opening an outlet valve of the filter to discharge waste liquid;
s190, appearance inspection: and opening a manhole at the top of the filter, checking and recording the condition of the filter element, comparing the condition with the condition of the filter element before cleaning, and recording the clean condition of the cleaned appearance.
2. The method for on-line cleaning of a cover filter according to claim 1, wherein: the step S110 of isolating the filter includes the following specific steps:
s210, closing a manual water inlet valve and an automatic water inlet valve of the filter;
s220, closing a manual water outlet valve and an automatic water outlet valve of the filter.
3. The method for on-line cleaning of a cover filter according to claim 1, wherein: and (3) exploding the membrane in the step S120 at least 2 times for each filter element.
4. The method for on-line cleaning of a cover filter according to claim 1, wherein: the step S140 of alkaline washing comprises the following specific steps:
s410, starting a condensate pump to inject condensate into the filter;
s420, when the temperature in the filter is within the cleaning temperature range, closing the condensate pump, and performing film laying circulation to form film laying circulation;
s430, adding an alkaline degreasing agent into the film spreading box;
s440, turning on a syringe pump, and conveying the alkaline degreasing agent into the filter through the syringe pump;
s450, after the delivery of the alkaline degreasing agent is finished, stopping the injection pump, closing a valve between the injection pump and the film spreading box, and opening a valve between an inlet of the injection pump and the filter;
s460, starting the injection pump, and performing circulating alkaline washing between the filter and the injection pump;
s470, stop the syringe pump, soak.
5. The method for on-line cleaning of a cover filter according to claim 4, wherein: the alkaline degreasing agent is LN-5 alkaline degreasing agent.
6. The method for on-line cleaning of a cover filter according to claim 1, wherein: the acidic cleaning agent is LN-LYQXJ acidic cleaning agent.
7. The method for on-line cleaning of a cover filter according to claim 1, wherein: the deironing cleaning corrosion inhibitor is LN-246 deironing cleaning corrosion inhibitor.
8. The method for on-line cleaning of a cover filter according to claim 1, wherein: the high-efficiency reducing agent is LN-GHJ high-efficiency reducing agent.
9. The method for on-line cleaning of a cover filter according to claim 1, wherein: the waste liquid treatment agent is LN-CAI waste liquid treatment agent.
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| CN202110269145.1A CN113082839A (en) | 2021-03-12 | 2021-03-12 | On-line cleaning method for covering filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110269145.1A CN113082839A (en) | 2021-03-12 | 2021-03-12 | On-line cleaning method for covering filter |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999050319A1 (en) * | 1998-03-25 | 1999-10-07 | Daikin Industries, Ltd. | Method of reducing metal content in fluoroelastomer |
| EP2894241A1 (en) * | 2012-09-10 | 2015-07-15 | JE International Corporation | Masking agent, and method for producing surface-treated base |
| 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 |
| 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 |
-
2021
- 2021-03-12 CN CN202110269145.1A patent/CN113082839A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999050319A1 (en) * | 1998-03-25 | 1999-10-07 | Daikin Industries, Ltd. | Method of reducing metal content in fluoroelastomer |
| EP2894241A1 (en) * | 2012-09-10 | 2015-07-15 | JE International Corporation | Masking agent, and method for producing surface-treated base |
| 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 |
| 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 |
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