CN108330497B - Chemical cleaning device and cleaning method for low-temperature multi-effect seawater desalination device - Google Patents
Chemical cleaning device and cleaning method for low-temperature multi-effect seawater desalination device Download PDFInfo
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- CN108330497B CN108330497B CN201810283819.1A CN201810283819A CN108330497B CN 108330497 B CN108330497 B CN 108330497B CN 201810283819 A CN201810283819 A CN 201810283819A CN 108330497 B CN108330497 B CN 108330497B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/046—Treatment of water, waste water, or sewage by heating by distillation or evaporation under vacuum produced by a barometric column
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Abstract
The utility model provides a low temperature multiple effect sea water desalination device's chemical cleaning device, includes with the wash tank, washing liquid filter, the dispensing pump of pipe connection, washs circulating pump, washs the filter, its characterized in that: the top end of the cleaning tank is connected with a water source inlet valve, the bottom of the cleaning tank is connected with a compression air valve, the cleaning tank is connected with a dispensing pump through a pipeline, and a cleaning liquid filter is connected between the cleaning tank and the dispensing pump; the cleaning and circulating pump comprises a dispensing pump, and is characterized in that a cleaning and circulating pump inlet valve is arranged at the left end of the cleaning and circulating pump, one end of the cleaning and circulating pump inlet valve is connected with a cleaning liquid outlet valve of the dispensing pump and a cleaning liquid return pipe at the bottom of a plurality of effect bodies, a cleaning and circulating pump outlet valve is arranged at the right end of the cleaning and circulating pump, one end of the cleaning and circulating pump outlet valve is connected with a cleaning filter, and the cleaning filter is connected with a cleaning agent inflow pipeline at the top end of each effect body.
Description
Technical Field
The invention relates to the field of cleaning devices, in particular to a chemical cleaning device and a cleaning method of a low-temperature multi-effect sea water desalting device.
Background
The low-temperature multi-effect sea water desalination system is a mainstream technical scheme for sea water desalination and water production at present internationally and domestically. The system generally adopts a mode of 'cogeneration', utilizes the steam of the generator set to heat the seawater, and distills out the desalted water. Although the system adopts a low-temperature vacuum evaporation mode, a plurality of scale prevention processes are adopted from design, and in order to prevent the scale on the heat exchange tube from being generated in a large amount in the running process, agents such as a scale inhibitor, a defoaming agent and the like are usually added, a certain scale is generated on the surface of the heat exchange tube in the long-term running process, so that the heat transfer and water production energy consumption of the system are influenced, and a large amount of steam is consumed and the water production price is increased.
Chemical cleaning is the main means to effectively solve the above problems, and usually the system cleaning should be performed every 2-3 years of operation of the equipment. The cleaning process is to add a certain amount of acid and some other agents into the effective body, wash the heat exchange tube in a spray mode from top to bottom, recycle bottom water, and use a cleaning circulating pump to carry out circulating cleaning, finally clean and strip the scale on the surface of the heat exchange tube, wherein the removal amount of the scale can reach more than 90%, and the effect is obvious through test verification. In the pickling process, hydrochloric acid, sulfamic acid and other organic and inorganic acids are adopted for pickling according to the upper scale components and distribution conditions of the heat exchange tubes, and chemical components such as corrosion inhibitors, defoamers, surfactants and the like are added. In the case of serious scale formation on the pipeline, especially in the case of indissolvable scale, the process of alkaline washing or neutral washing should be adopted. The waste liquid after washing is generally discharged or comprehensively treated after the subsequent treatment processes such as neutralization and the like.
At present, the commercial operation cases of the domestic large-scale low-temperature multi-effect sea water desalination system are fewer, the commercial operation cases are mostly combined with power plants or steel plants, the equipment is mostly imported products or produced by using foreign technology, the cleaning is still required along with the related content of foreign technical data, the cleaning times and experience are fewer, further digestion and autonomous innovation are not achieved, and a systematic chemical cleaning process flow and method are not formed. From the cleaning effect of the existing scheme, the phenomena of over-washing and under-washing caused by corrosion of the surface of the heat exchange tube or poor cleaning effect due to improper operation and control of the process flow in the cleaning process often occur, the cleaning process is not controlled due to unbalanced proportion and untimely detection of the cleaning agent, and the conditions of time consumption, medicine consumption, large wastewater yield and the like in the cleaning process are caused, so that the overall effect is not ideal.
Objective drawbacks of the prior art:
(1) Most of the existing chemical cleaning systems adopt mobile cleaning vehicles or use temporary large storage tanks and assist temporary pipelines and valve systems for cleaning, more equipment is needed to be rented and construction is carried out, so that manpower and financial resources are consumed, and cleaning cost is increased. The invention utilizes the existing dosing tank (the low-temperature multi-effect sea water desalination system matching devices such as scale inhibitor, defoamer and the like can be utilized, and a special small pickling tank can be also arranged), and the cleaning of the device can be realized only by connecting a simple pump and a pipeline.
(2) The existing chemical cleaning system is mainly characterized in that a mixer is configured to mix the medicaments in the cleaning process, so that the mixing effect is poor and the time is long. The invention adopts the mode of circularly adding bottom compressed air to stir and mix by pumping out the pump, solves the problems, has high dissolution speed of the verified medicament and good mixing effect, and avoids the possible damage of the conventional working mode stirrer in the process of liquid fluctuation in the tank.
(3) The conventional chemical cleaning cannot achieve better cleaning conditions due to low cleaning water temperature, and adopts a steam heating mode, so that the difficulty in temperature control is high, local overheating phenomenon is easy to occur, and the requirement on the material of a cleaning system is high. The invention directly utilizes the first-effect condensed water (the highest temperature is about 70 ℃) of the adjacent sea water desalination device, and after simple mixing, the water temperature can reach the cleaning requirement, and the water quantity is sufficient and stable to supply.
(4) The conventional chemical cleaning uses a temporary cleaning tank and a temporary cleaning system, the dispensing time is long, the operation is repeated after the tank of chemical is added into the acid cleaning system, the concentration fluctuation of the chemical in the system is large, the continuous and online cleaning agent addition cannot be realized, and the phenomenon of over-cleaning of the cleaning surface in a short time is easily caused.
(5) The conventional cleaning process is mostly a parallel feed cleaning mode of an effective group, and uses the same concentration of cleaning liquid for the effective bodies with different scales, so that the phenomenon of under-cleaning of the effective bodies with serious scales and over-cleaning of the effective bodies with lighter scales is caused, the targeted cleaning process cannot be realized, the free combination and the online switching cannot be realized, the cleaning time is prolonged, and a large amount of cleaning liquid is wasted.
(6) The dispensing system can also be used for adding and preparing various solid and liquid medicaments, so that the flexibility and the adaptability of the system are improved.
(7) The conventional cleaning process has insufficient mixing of the cleaning liquid and the circulating liquid, is easy to cause concentration deviation of the cleaning circulating liquid, and seriously affects the cleaning effect.
(8) In the conventional cleaning circulation process, the circulating liquid is very easy to carry peeled impurities such as dirt, silt, sticky mud, paint skin and the like to block the nozzle, so that the circulating liquid is influenced to be uniformly distributed to each heat exchange tube bundle of the evaporator, and further the cleaning effect is influenced.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to provide a chemical cleaning apparatus and a cleaning method for a low-temperature multi-effect sea water desalination apparatus.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a low temperature multiple effect sea water desalination device's chemical cleaning device, includes with the wash tank, washing liquid filter, the dispensing pump of pipe connection, washs circulating pump, washs the filter, its characterized in that: the top end of the cleaning tank is connected with a water source inlet valve, the bottom of the cleaning tank is connected with a compression air valve, the cleaning tank is connected with a dispensing pump through a pipeline, and a cleaning liquid filter is connected between the cleaning tank and the dispensing pump; the cleaning and circulating pump comprises a dispensing pump, and is characterized in that a cleaning and circulating pump inlet valve is arranged at the inlet end of the cleaning and circulating pump, one end of the cleaning and circulating pump inlet valve is connected with a cleaning liquid outlet valve of the dispensing pump, and cleaning liquid return pipes at the bottoms of a plurality of effects, a cleaning and circulating pump outlet valve is arranged at the right end of the cleaning and circulating pump, one end of the cleaning and circulating pump outlet valve is connected with a cleaning filter, and the cleaning filter is connected with a cleaning agent inflow pipeline at the top end of each effect.
Further, isolation valves are arranged at two ends of the cleaning liquid filter.
Further, a liquid level transmitter is arranged at the top of the cleaning tank.
Further, a cleaning liquid sampling valve is arranged behind the cleaning filter.
Further, a cleaning liquid return valve is arranged on the cleaning liquid return pipe.
A cleaning method of a chemical cleaning device adopting a low-temperature multi-effect seawater desalination device is characterized by comprising the following steps of:
s1: opening a water source inlet valve 1, injecting a certain amount of clear water into the cleaning tank, adding a certain amount of first-effect condensate water of the adjacent running sea water desalination system according to the cleaning temperature requirement, and mixing according to a certain proportion according to the requirement to adjust the preparation temperature of the medicament or the cleaning liquid temperature; opening a dispensing pump inlet valve 14, putting the configured cleaning liquid into a cleaning liquid filter, starting a dispensing pump, opening a dispensing pump outlet valve and opening a dispensing circulation valve after normal operation;
s2: after confirming that the liquid level of the cleaning tank is stable, opening a compressed air valve, adding a stirring compressed air source, adding cleaning medicines according to a predetermined proportion, stirring for more than 10 minutes, and ensuring uniform mixing;
s3: confirming a single effect body to be cleaned or any combination of 2-5 cleaning effects which need to be arranged in parallel, injecting water quantity which can ensure the normal operation of a cleaning circulating pump into the bottom of the effect body in advance, starting an inlet valve of the pickling circulating pump, starting an outlet valve of the pickling circulating pump after the pump operates stably, putting the pickling circulating pump into a pump outlet filter, performing cleaning circulation, and confirming whether leakage exists and whether the liquid level is stable or not, wherein the indication of an evaporator water inlet flowmeter at the inlet of the effect body to be cleaned and the evaporator water inlet flowmeter at the inlet of the effect body group is normal within a required range;
s4: opening a cleaning pump cleaning liquid inlet valve and a cleaning liquid water return valve, closing a dispensing circulation valve, adjusting a cleaning liquid circulation control valve to a proper position, gradually mixing a corrosion inhibitor in a pickling tank into a pickling circulation system, preparing the cleaning liquid according to the concentration of 10% in the cleaning tank, and after confirming that the cleaning liquid is added into the pickling circulation system, preparing the cleaning liquid again every 20-30 minutes, and conveying the cleaning liquid to the cleaning system to enable the cleaning system to reach expected indexes;
s5: repeating the above operation, opening the cleaning liquid sampling valve to sample and detect, and stopping the cleaning cycle when the detected concentration of the cleaning liquid reaches the specified value.
The invention has the advantages that:
(1) By using the original field equipment and system, a plurality of links such as renting, transporting, installing and debugging the temporary system before and after cleaning are reduced, the cost of materials and labor is reduced, the working period is shortened, and favorable conditions are created for smoothly completing the cleaning work.
(2) The seawater desalination device first-effect condensate water is adopted to prepare the cleaning liquid, and various measures such as compressed air disturbance mixing and continuous on-line dispensing are adopted, so that the conditions of uniform concentration of the cleaning liquid, stable cleaning temperature and the like are well ensured, and the stable and reliable cleaning process is ensured.
(3) The device can realize the independent cleaning of any one effect body or the combined cleaning of any 2-5 effect bodies of the seawater desalination system, has higher cleaning flexibility, can carry out combination and key cleaning according to the scaling condition, the checking effect of the cleaning process and the like, can be flexibly switched, furthest reduces the cleaning time and improves the utilization rate of the cleaning liquid.
(4) The continuous and online acid adding mode is adopted, so that the dosage is uniform and stable, and the stability and controllability of the cleaning process are facilitated.
(5) The medicine dispensing system of the device can realize the neutralization of medicines in the final cleaning stage, can be recycled or discharged to a designated place after being connected with an outer discharge pipeline, avoids the influence on the heat exchange tube caused by the neutralization in the effective body, and prevents the cleaned dirt from being reattached on the heat exchange surface.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram showing the connection of the pipes of the cleaning apparatus when the pickling agent is added.
Wherein:
1. a water source inlet valve; 2. a liquid level transmitter; 3. compressing the air valve; 4. a cleaning liquid filter;
5. a cleaning liquid circulation control valve; 6. a cleaning liquid sampling valve; 7. cleaning the filter; 8. cleaning a circulating pump;
9. inlet valve of evaporator; 10. an evaporator water inlet flowmeter; 11. a cleaning liquid return valve; 12. a cleaning liquid delivery valve;
13. a cleaning tank 14, a dispensing pump inlet valve 15, a dispensing pump 16 and a dispensing pump outlet valve;
17. a dispensing circulation valve; 18. an effective body; 19. an inlet valve of the pickling circulating pump; 20. an outlet valve of the pickling circulating pump;
21. a cleaning liquid inlet pipe; 22. a cleaning liquid return pipe;
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, a chemical cleaning device of a low-temperature multi-effect sea water desalination device comprises a cleaning tank, a cleaning liquid filter 4, a dispensing pump, a cleaning circulating pump 8 and a cleaning filter 7 which are connected by pipelines, and is characterized in that: the top end of the cleaning tank is connected with a water source inlet valve, the bottom of the cleaning tank is connected with a compression air valve 3, the cleaning tank is connected with a dispensing pump through a pipeline, and a cleaning liquid filter 4 is connected between the cleaning tank and the dispensing pump; the cleaning and circulating pump 8 left end is equipped with the cleaning and circulating pump 8 inlet valve, cleaning and circulating pump 8 inlet valve one end is connected the washing liquid of dispensing pump is sent out valve 12 to and the washing liquid return pipe 22 of a plurality of effect body 18 bottoms, cleaning and circulating pump 8 right-hand member is equipped with cleaning and circulating pump 8 outlet valve, cleaning and circulating pump 8 outlet valve one end is connected with cleaning filter 7, cleaning filter 7 connects the washing agent inflow pipeline on each effect body 18 top, cleaning fluid filter 4 both ends are equipped with dispensing pump inlet valve, the washing tank top is equipped with liquid level transmitter 2, set up washing liquid sampling valve 6 behind the cleaning filter 7, set up washing liquid return valve 11 on the washing liquid return pipe.
The working mode is as follows:
a cleaning method of a chemical cleaning device adopting a low-temperature multi-effect sea water desalting device comprises the following steps:
s1: opening a water source inlet valve 1, injecting a certain amount of clear water into the cleaning tank (according to the indication of a liquid level transmitter 2 or the observation of an on-site liquid level meter, according to the control of about one half of the highest liquid level of the tank), adding a certain amount of first-effect condensate water of an adjacent running sea water desalination system according to the cleaning temperature requirement, and mixing according to a certain proportion according to the requirement to adjust the agent configuration temperature or the cleaning liquid temperature; opening a dispensing pump inlet valve, putting the configured cleaning liquid into a cleaning liquid filter, starting a dispensing pump, opening a dispensing pump outlet valve and opening a dispensing circulation valve 17 door after normal operation, and performing dispensing system small circulation;
s2: after confirming that the liquid level of the cleaning tank is stable, opening a 3-door of a compressed air valve, adding a stirring compressed air source, adding cleaning medicines according to a predetermined proportion, and under normal conditions, firstly adding a special cleaning corrosion inhibitor according to the proportion of 2% -4% of the washing water volume of the cleaning body 18 of the effect body 18, stirring for more than 10 minutes, and ensuring uniform mixing;
s3: confirming a single effect body 18 to be cleaned or any combination of 2-5 cleaning effects which need to be arranged side by side, pre-filling water which can ensure the normal operation of a cleaning circulating pump 8 at the bottom of the effect body 18, wherein the water is about 50% of the liquid level indicated by a liquid level meter, opening an inlet valve 9 (one or more inlet valves 19 of a pickling circulating pump according to cleaning requirements), starting the inlet valve 19 of the pickling circulating pump, opening an outlet valve of the pickling circulating pump after the pump is stable in operation, putting the outlet valve of the pickling circulating pump into a pump outlet filter for cleaning circulation, confirming whether leakage exists and the liquid level is stable or not, and indicating the normal state of the evaporator inlet flow meter 10 at the inlets of the effect body 18 and the effect body 18 group to be cleaned within the required range;
s4: opening a cleaning pump cleaning liquid inlet valve and a cleaning liquid water return valve, closing a dispensing circulation valve 17, adjusting a cleaning liquid circulation control valve 5 to a proper position, gradually mixing corrosion inhibitors in a pickling tank into a pickling circulation system, preparing cleaning liquid according to the concentration of 10% in the cleaning tank, and after confirming that the cleaning liquid is added into the pickling circulation system, preparing the cleaning liquid again every 20-30 minutes, and conveying the cleaning liquid to the cleaning system to enable the cleaning system to reach expected indexes;
s5: the above operation is repeated, and the cleaning liquid sampling valve 6 is opened to perform sampling detection, and when the detected concentration of the cleaning liquid reaches a prescribed value, the cleaning cycle is stopped.
During the cleaning process, if a large amount of foam appears in the interior of the effective body 18 as seen from the manhole, 200 ml/time of defoaming agent can be added from the pickling tank until the foam is effectively suppressed.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (4)
1. The utility model provides a low temperature multiple effect sea water desalination device's chemical cleaning device, includes with the wash tank, washing liquid filter, the dispensing pump of pipe connection, washs circulating pump, washs the filter, its characterized in that: the cleaning tank is characterized in that the top end of the cleaning tank is connected with a water source inlet valve, the bottom of the cleaning tank is connected with a compression air valve, the cleaning tank is connected with the dispensing pump through a pipeline, a cleaning fluid filter is connected between the cleaning tank and the dispensing pump, a cleaning fluid sampling valve is arranged at the outlet of the cleaning filter, a cleaning circulation pump inlet valve is arranged at the inlet of the cleaning circulation pump, one end of the cleaning circulation pump inlet valve is connected with a cleaning fluid outlet valve of the dispensing pump and a cleaning fluid return pipe at the bottom of a plurality of effective bodies, a cleaning fluid return valve is arranged on the cleaning fluid return pipe, a cleaning circulation pump outlet valve is arranged at the outlet of the cleaning circulation pump, one end of the cleaning circulation pump outlet valve is connected with a cleaning filter, and the cleaning filter is connected with a cleaning fluid inflow pipeline at the top end of each effective body.
2. A chemical cleaning apparatus for a low temperature multi-effect desalination apparatus as defined in claim 1 wherein said cleaning liquid filter is provided at both ends thereof with isolation valves for facilitating disassembly of the filter cleaning process.
3. A chemical cleaning device for a low temperature multi-effect desalination plant as claimed in claim 1 wherein a liquid level transducer is provided at the top of the cleaning tank.
4. A method of cleaning a chemical cleaning apparatus employing a low temperature multi-effect desalination apparatus as claimed in any one of claims 1 to 3, wherein:
s1: opening a water source inlet valve (1), injecting a certain amount of clear water into the cleaning tank, adding a certain amount of first-effect condensate water of the adjacent running sea water desalination system according to the cleaning temperature requirement, and mixing according to a certain proportion according to the requirement to adjust the medicament configuration temperature or the cleaning liquid temperature; opening a dispensing pump inlet valve (14), putting the configured cleaning liquid into a cleaning liquid filter, starting a dispensing pump, opening a dispensing pump outlet valve and opening a dispensing circulation valve after the dispensing pump runs normally;
s2: after confirming that the liquid level of the cleaning tank is stable, opening a compressed air valve, adding a stirring compressed air source, adding cleaning medicines according to a predetermined proportion, stirring for more than 10 minutes, and ensuring uniform mixing;
s3: confirming a single effect body to be cleaned or any combination of 2-5 cleaning effects which need to be arranged in parallel, injecting water quantity which can ensure the normal operation of a cleaning circulating pump into the bottom of the effect body in advance, starting an inlet valve of the pickling circulating pump, starting an outlet valve of the pickling circulating pump after the pump operates stably, putting the pickling circulating pump into a pump outlet filter, performing cleaning circulation, and confirming whether leakage exists and whether the liquid level is stable or not, wherein the indication of an evaporator water inlet flowmeter at the inlet of the effect body to be cleaned and the evaporator water inlet flowmeter at the inlet of the effect body group is normal within a required range;
s4: opening a cleaning liquid inlet valve and a cleaning liquid return valve of a cleaning pump, opening a dispensing circulation valve, adjusting a cleaning liquid circulation control valve to a proper position, gradually mixing corrosion inhibitor in a pickling tank into a pickling circulation system, preparing cleaning liquid in the cleaning tank according to the concentration of 10 percent,
s5, after the cleaning liquid is confirmed to be added into the pickling circulation system, the cleaning liquid is prepared again every 20-30 minutes and is conveyed to the cleaning system, so that the cleaning liquid reaches the expected index;
s6: repeating the above operation, opening the cleaning liquid sampling valve to sample and detect, and stopping the cleaning cycle when the detected concentration of the cleaning liquid reaches the specified value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810283819.1A CN108330497B (en) | 2018-04-02 | 2018-04-02 | Chemical cleaning device and cleaning method for low-temperature multi-effect seawater desalination device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810283819.1A CN108330497B (en) | 2018-04-02 | 2018-04-02 | Chemical cleaning device and cleaning method for low-temperature multi-effect seawater desalination device |
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| CN108330497B true CN108330497B (en) | 2023-09-26 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109495987B (en) * | 2018-10-24 | 2021-04-30 | 四川同人精工科技有限公司 | Electric heating element deformation detection control system |
| CN112344777B (en) * | 2019-08-08 | 2022-10-11 | 中国石油化工股份有限公司 | Spiral plate heat exchange system and back washing method thereof |
| CN112815767B (en) * | 2021-01-15 | 2022-11-11 | 中国神华能源股份有限公司国华电力分公司 | Cleaning method of seawater desalination device |
| CN115228855A (en) * | 2022-07-27 | 2022-10-25 | 重庆朝阳气体有限公司 | Method for cleaning standard gas equipment pipeline |
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| FR2058537A5 (en) * | 1969-09-08 | 1971-05-28 | Geisert Hans | |
| FR2906262A1 (en) * | 2006-09-27 | 2008-03-28 | Ajlit Ressources Soc Par Actio | Surface treatment plant, especially for metal profiles, has compressed air generator and supply circuit for purging treatment solution distribution and suction lines |
| CN102094211A (en) * | 2009-12-14 | 2011-06-15 | 中国神华能源股份有限公司 | Acid washing system of low-temperature multi-effect seawater desalting equipment |
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| CN108330497A (en) | 2018-07-27 |
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