Cleaning method of steam water tank

Abstract

The invention relates to the technical field of steam water tanks, in particular to a steam water tank cleaning method. The cleaning method comprises the following steps: preparing a cleaning solution, storing the cleaning solution into a solution tank, pumping the cleaning solution to the inner wall surface of the steam water tank to be cleaned, spraying and coating the inner wall surface of the steam water tank with the cleaning solution, and circularly spraying the cleaning solution until the cleaning is finished. The cleaning method of the steam water tank can continuously clean the inner wall surface of the water tank, and has the advantages of saving cleaning liquid and being high in cleaning efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of steam water tanks, and in particular to a method for cleaning a steam water tank. Background Art

[0002] During long-term use, the inner wall of the water tank will form dirt and rust due to long-term immersion in water and the precipitation of impurities and minerals in the water, which will affect the normal use of the water tank and the safety of water quality. The traditional cleaning method is manual scrubbing, which is inefficient and difficult to completely remove dirt.

[0003] As a chemical cleaning method, pickling can effectively remove dirt and rust on the inner wall of the water tank. However, the existing pickling method for cleaning the water tank only soaks all the pickling solution in the water tank. On the one hand, this wastes the pickling solution, and on the other hand, the cleaning dirt is retained on the inner wall of the water tank, resulting in low cleaning efficiency. Summary of the invention

[0004] The purpose of the present invention is to avoid the deficiencies in the prior art and provide a method for cleaning a steam water tank, which can continuously clean the inner wall surface of the water tank and has the advantages of saving cleaning liquid and high cleaning efficiency.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for cleaning a steam water tank is provided, comprising the following steps:

[0007] Prepare cleaning liquid, store the cleaning liquid in a liquid tank, pump the cleaning liquid to the inner wall surface of the steam water tank to be cleaned, cover the inner wall surface of the steam water tank, drive the cleaning liquid to circulate and flush the inner wall surface of the steam water tank, so that the cleaning liquid reacts with the dirt on the inner surface until the cleaning is completed.

[0008] Prepare a cleaning liquid that can be used to clean dirt in the steam water tank, that is, it is consistent with the dirt on the inner wall of the steam water tank, so that it can better achieve chemical reaction with the dirt and achieve the cleaning effect; then, use a circulating pump to pump out the cleaning liquid and spray it onto the inner wall of the steam water tank. At this time, ensure that the cleaning liquid can cover the entire inner wall of the water tank, thereby ensuring that the cleaning liquid can continue to fully react with the dirt on the inner wall, which can replace the cleaning liquid immersion method to achieve the cleaning effect.

[0009] In some embodiments, if the inner wall of the steam water tank is made of stainless steel, the cleaning solution includes 5% to 15% citric acid solution.

[0010] Stainless steel is mainly composed of elements such as iron, chromium, carbon, and sometimes other elements such as nickel, molybdenum, and titanium are added. Therefore, using citric acid solution can better remove dirt without damaging the stainless steel.

[0011] In some embodiments, if the inner wall of the steam water box is made of carbon steel, the cleaning liquid includes a 10% to 20% hydrochloric acid solution.

[0012] Carbon steel is an iron-based alloy containing carbon and other small amounts of elements (such as manganese, silicon, and phosphorus). Therefore, using a 10% to 20% hydrochloric acid solution can effectively remove dirt without damaging the carbon steel material.

[0013] In some embodiments, when preparing the hydrochloric acid solution, the hydrochloric acid is slowly injected into clean water.

[0014] In order to avoid the generation of white mist during the preparation process and affect the accuracy of the preparation, hydrochloric acid is poured into water for preparation.

[0015] In some embodiments, the cleaning solution further includes a corrosion inhibitor, and the weight of the corrosion inhibitor is 0.5% to 2% of the weight of the cleaning solution.

[0016] The corrosion inhibitor can be used to reduce the corrosion of the pickling solution on the water tank material.

[0017] In some embodiments, the corrosion inhibitor is thiourea or hexamethylenetetramine, and may be other corrosion inhibitors.

[0018] In some embodiments, the flushing flow rate of the cleaning solution is 1 m 3 / h~20m 3 / h, the pressure is 0.2MPa~0.5MPa.

[0019] The dirt on the inner wall of the water tank can be cleaned better by the flushing flow and pressure.

[0020] In some embodiments, the cleaning time of the cleaning solution is 1 hour to 10 hours.

[0021] By maintaining the cleaning time, the inner surface of the water tank can be fully cleaned. The cleaning liquid needs to be precipitated during the circulation process, so that dirt can be removed in time to ensure the effect of each circulation cleaning.

[0022] In some embodiments, after the cleaning liquid is cleaned, the inner wall surface of the steam water tank is washed with clean water, and the pH of the clean water washing liquid is detected in real time. When the pH is neutral, the washing is terminated.

[0023] After cleaning, the inner wall of the steam tank is rinsed with clean water to wash away the pickling liquid, thereby avoiding corrosion of the inner wall of the steam tank by the cleaning liquid. At the same time, the pH of the clean water rinse liquid is detected in real time to know the degree of rinse. The closer the pH is to neutral, the cleaner the rinse.

[0024] In some embodiments, when cleaning with the cleaning liquid, the cleaning is terminated when the inner wall surface of the steam water box is smooth and clean.

[0025] Observe the inner wall of the steam tank to determine whether it is clear and clean.

[0026] Beneficial effects of a steam water tank cleaning method of the present invention:

[0027] The steam water tank cleaning method of the present invention sprays the cleaning liquid onto the inner wall surface of the steam water tank in a circular manner, and there is no need to immerse all the cleaning liquid in the water tank, thereby saving the cleaning liquid and preventing a large amount of cleaning liquid from being contaminated; and since the circulating cleaning liquid can take away the cleaned solid pollutants in time, the cleaning efficiency is improved. In addition, the use of a circular spraying method increases the contact area and reaction speed between the pickling liquid and the dirt, shortens the cleaning time, and improves the cleaning efficiency. The pickling liquid used in the cleaning process can be recycled, reducing the waste of the pickling liquid and the pollution to the environment. At the same time, the smoothness of the inner wall of the water tank after cleaning is improved, the water resistance is reduced, and the energy consumption of the water pump is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 1 is a flow chart of a method for cleaning a steam water tank according to an embodiment of the present invention.

[0029] Figure 2 Schematic diagram of the working state of the steam water box cleaning method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0031] The terms used in the present invention are only for the purpose of describing specific implementation regulations, and are not intended to limit the present invention. The singular forms "a", "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0032] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] Example 1

[0034] During long-term use, the inner wall of the water tank will form dirt and rust due to long-term immersion in water and the precipitation of impurities and minerals in the water, which will affect the normal use of the water tank and the safety of water quality. The traditional cleaning method is manual scrubbing, which is inefficient and difficult to completely remove dirt.

[0035] As a chemical cleaning method, pickling can effectively remove dirt and rust on the inner wall of the water tank. However, the existing pickling method for cleaning the water tank only soaks all the pickling solution in the water tank. On the one hand, this wastes the pickling solution, and on the other hand, the cleaning dirt is retained on the inner wall of the water tank, resulting in low cleaning efficiency.

[0036] In view of this technical problem, this embodiment discloses a method for cleaning a steam water tank, please refer to Figure 1-2 , including the following steps:

[0037] Prepare cleaning liquid, store the cleaning liquid in a liquid tank, pump the cleaning liquid to the inner wall surface of the steam water tank to be cleaned, cover the inner wall surface of the steam water tank, drive the cleaning liquid to circulate and flush the inner wall surface of the steam water tank, so that the cleaning liquid reacts with the dirt on the inner surface until the cleaning is completed.

[0038] Prepare a cleaning liquid that can be used to clean dirt in the steam water tank, that is, it is consistent with the dirt on the inner wall of the steam water tank, so that it can better achieve chemical reaction with the dirt and achieve the cleaning effect; then, use a circulating pump to pump out the cleaning liquid and spray it onto the inner wall of the steam water tank. At this time, ensure that the cleaning liquid can cover the entire inner wall of the water tank, thereby ensuring that the cleaning liquid can continue to fully react with the dirt on the inner wall, which can replace the cleaning liquid immersion method to achieve the cleaning effect.

[0039] Furthermore, during the circulation of the cleaning liquid, the cleaning liquid is also stirred.

[0040] In this embodiment, if the inner wall of the steam water tank is made of stainless steel, the cleaning liquid includes 8% citric acid solution.

[0041] Stainless steel is mainly composed of elements such as iron, chromium, carbon, and sometimes other elements such as nickel, molybdenum, and titanium are added. Therefore, using citric acid solution can better remove dirt without damaging the stainless steel.

[0042] In this embodiment, when preparing the hydrochloric acid solution, the hydrochloric acid is slowly injected into the clean water.

[0043] In order to avoid the generation of white mist during the preparation process and affect the accuracy of the preparation, hydrochloric acid is poured into water for preparation.

[0044] In this embodiment, the cleaning solution further includes a corrosion inhibitor, and the weight of the corrosion inhibitor is 1% of the weight of the cleaning solution.

[0045] The corrosion inhibitor can be used to reduce the corrosion of the pickling solution on the water tank material.

[0046] In this embodiment, the corrosion inhibitor is thiourea or hexamethylenetetramine, and may be other corrosion inhibitors.

[0047] In this embodiment, the flushing flow rate of the cleaning liquid is 12m 3 / h, the pressure is 0.3MPa.

[0048] By adjusting the pickling liquid flow and pressure, the residence time is controlled and the cleaning effect is enhanced. The dirt on the inner wall of the water tank can be better cleaned through this flushing flow and pressure.

[0049] In this embodiment, the cleaning time of the cleaning solution is 6 hours.

[0050] By maintaining this cleaning time, the inner surface of the water tank can be fully cleaned. In the circulation process, the cleaning liquid needs to be precipitated so that the dirt can be removed in time to ensure the cleaning effect of each cycle. In actual application, the specific time depends on the concentration, temperature and degree of dirt of the pickling liquid.

[0051] In this embodiment, after the cleaning liquid is cleaned, clean water is used to rinse the inner wall surface of the steam water tank, and the pH of the clean water rinse liquid is detected in real time. When the pH is neutral, the rinse is terminated.

[0052] After cleaning is completed, the cleaning liquid is discharged from the water tank and the water tank is rinsed with plenty of clean water. By using clean water to rinse the inner wall of the steam water tank, the cleaning liquid can be washed away, thereby avoiding corrosion of the inner wall of the steam water tank by the cleaning liquid. At the same time, the pH of the clean water rinse liquid is detected in real time to know the degree of rinse. The closer the pH is to neutral, the cleaner the rinse.

[0053] For example, after the cleaning is completed, the cleaning liquid is discharged from the water tank, the circulation pump is connected to the water tank, the valve is opened to drain the water, and the water tank is rinsed with a large amount of clean water to remove the residual cleaning liquid and reaction products. The flow rate of the flushing water should be greater than the flow rate of the cleaning liquid, and the flushing time is generally 18 minutes, until the pH value of the flushing water is close to neutral.

[0054] In this embodiment, when cleaning with cleaning liquid, the cleaning is completed when the inner wall surface of the steam water tank is smooth and clean.

[0055] Observe the inner wall of the steam tank to determine whether it is clear and clean.

[0056] After cleaning, the inner wall of the water tank was checked and it was found that the rust had been completely removed and the inner wall of the water tank was smooth and clean. At the same time, the pH value of the flushing water was tested and it was found that the pH value was close to neutral, which met the cleaning requirements.

[0057] Example 2

[0058] During long-term use, the inner wall of the water tank will form dirt and rust due to long-term immersion in water and the precipitation of impurities and minerals in the water, which will affect the normal use of the water tank and the safety of water quality. The traditional cleaning method is manual scrubbing, which is inefficient and difficult to completely remove dirt.

[0059] As a chemical cleaning method, pickling can effectively remove dirt and rust on the inner wall of the water tank. However, the existing pickling method for cleaning the water tank only soaks all the pickling solution in the water tank. On the one hand, this wastes the pickling solution, and on the other hand, the cleaning dirt is retained on the inner wall of the water tank, resulting in low cleaning efficiency.

[0060] In view of this technical problem, this embodiment discloses a method for cleaning a steam water tank, please refer to Figure 1-2 , including the following steps:

[0061] Prepare cleaning liquid, store the cleaning liquid in a liquid tank, pump the cleaning liquid to the inner wall surface of the steam water tank to be cleaned, cover the inner wall surface of the steam water tank, drive the cleaning liquid to circulate and flush the inner wall surface of the steam water tank, so that the cleaning liquid reacts with the dirt on the inner surface until the cleaning is completed.

[0062] Prepare a cleaning liquid that can be used to clean dirt in the steam water tank, that is, it is consistent with the dirt on the inner wall of the steam water tank, so that it can better achieve chemical reaction with the dirt and achieve the cleaning effect; then, use a circulating pump to pump out the cleaning liquid and spray it onto the inner wall of the steam water tank. At this time, ensure that the cleaning liquid can cover the entire inner wall of the water tank, thereby ensuring that the cleaning liquid can continue to fully react with the dirt on the inner wall, which can replace the cleaning liquid immersion method to achieve the cleaning effect.

[0063] Furthermore, during the circulation of the cleaning liquid, the cleaning liquid is also stirred.

[0064] In this embodiment, if the inner wall of the steam water box is made of carbon steel, the cleaning liquid includes 11.5% hydrochloric acid solution.

[0065] Carbon steel is an iron-based alloy containing carbon and other small amounts of elements (such as manganese, silicon, and phosphorus). Therefore, using a 15% hydrochloric acid solution can effectively remove dirt without damaging the carbon steel material.

[0066] In this embodiment, when preparing the hydrochloric acid solution, the hydrochloric acid is slowly injected into the clean water.

[0067] In order to avoid the generation of white mist during the preparation process and affect the accuracy of the preparation, hydrochloric acid is poured into water for preparation.

[0068] In this embodiment, the cleaning solution further includes a corrosion inhibitor, and the weight of the corrosion inhibitor is 1.5% of the weight of the cleaning solution.

[0069] The corrosion inhibitor can be used to reduce the corrosion of the pickling solution on the water tank material.

[0070] In this embodiment, the corrosion inhibitor is thiourea or hexamethylenetetramine, and may be other corrosion inhibitors.

[0071] In this embodiment, the flushing flow rate of the cleaning liquid is 15m 3 / h, the pressure is 0.4MPa.

[0072] By adjusting the pickling liquid flow and pressure, the residence time is controlled and the cleaning effect is enhanced. The dirt on the inner wall of the water tank can be better cleaned through this flushing flow and pressure.

[0073] In this embodiment, the cleaning time of the cleaning solution is 8 hours.

[0074] By maintaining this cleaning time, the inner surface of the water tank can be fully cleaned. In the circulation process, the cleaning liquid needs to be precipitated so that the dirt can be removed in time to ensure the cleaning effect of each cycle. In actual application, the specific time depends on the concentration, temperature and degree of dirt of the pickling liquid.

[0075] In this embodiment, after the cleaning liquid is cleaned, clean water is used to rinse the inner wall surface of the steam water tank, and the pH of the clean water rinse liquid is detected in real time. When the pH is neutral, the rinse is terminated.

[0076] After cleaning is completed, the cleaning liquid is discharged from the water tank and the water tank is rinsed with plenty of clean water. By using clean water to rinse the inner wall of the steam water tank, the cleaning liquid can be washed away, thereby avoiding corrosion of the inner wall of the steam water tank by the cleaning liquid. At the same time, the pH of the clean water rinse liquid is detected in real time to know the degree of rinse. The closer the pH is to neutral, the cleaner the rinse.

[0077] For example, after the cleaning is completed, the cleaning liquid is discharged from the water tank, the circulation pump is connected to the water tank, the valve is opened to drain the water, and the water tank is rinsed with a large amount of clean water to remove the residual cleaning liquid and reaction products. The flow rate of the flushing water should be greater than the flow rate of the cleaning liquid, and the flushing time is generally 20 minutes, until the pH value of the flushing water is close to neutral.

[0078] In this embodiment, when cleaning with cleaning liquid, the cleaning is completed when the inner wall surface of the steam water tank is smooth and clean.

[0079] Observe the inner wall of the steam tank to determine whether it is clear and clean.

[0080] After cleaning, the inner wall of the water tank was checked and it was found that the rust had been completely removed and the inner wall of the water tank was smooth and clean. At the same time, the pH value of the flushing water was tested and it was found that the pH value was close to neutral, which met the cleaning requirements.

[0081] Example 3

[0082] During long-term use, the inner wall of the water tank will form dirt and rust due to long-term immersion in water and the precipitation of impurities and minerals in the water, which will affect the normal use of the water tank and the safety of water quality. The traditional cleaning method is manual scrubbing, which is inefficient and difficult to completely remove dirt.

[0083] As a chemical cleaning method, pickling can effectively remove dirt and rust on the inner wall of the water tank. However, the existing pickling method for cleaning the water tank only soaks all the pickling solution in the water tank. On the one hand, this wastes the pickling solution, and on the other hand, the cleaning dirt is retained on the inner wall of the water tank, resulting in low cleaning efficiency.

[0084] In view of this technical problem, this embodiment discloses a method for cleaning a steam water tank, please refer to Figure 1-2 , including the following steps:

[0085] Prepare cleaning liquid, store the cleaning liquid in a liquid tank, pump the cleaning liquid to the inner wall surface of the steam water tank to be cleaned, cover the inner wall surface of the steam water tank, drive the cleaning liquid to circulate and flush the inner wall surface of the steam water tank, so that the cleaning liquid reacts with the dirt on the inner surface until the cleaning is completed.

[0086] Prepare a cleaning liquid that can be used to clean dirt in the steam water tank, that is, it is consistent with the dirt on the inner wall of the steam water tank, so that it can better achieve chemical reaction with the dirt and achieve the cleaning effect; then, use a circulating pump to pump out the cleaning liquid and spray it onto the inner wall of the steam water tank. At this time, ensure that the cleaning liquid can cover the entire inner wall of the water tank, thereby ensuring that the cleaning liquid can continue to fully react with the dirt on the inner wall, which can replace the cleaning liquid immersion method to achieve the cleaning effect.

[0087] Furthermore, during the circulation of the cleaning liquid, the cleaning liquid is also stirred.

[0088] In this embodiment, if the inner wall of the steam water box is made of carbon steel, the cleaning liquid includes 20% hydrochloric acid solution.

[0089] Carbon steel is an iron-based alloy containing carbon and other small amounts of elements (such as manganese, silicon, and phosphorus). Therefore, using a 20% hydrochloric acid solution can effectively remove dirt without damaging the carbon steel material.

[0090] In this embodiment, when preparing the hydrochloric acid solution, the hydrochloric acid is slowly injected into the clean water.

[0091] In order to avoid the generation of white mist during the preparation process and affect the accuracy of the preparation, hydrochloric acid is poured into water for preparation.

[0092] In this embodiment, the cleaning solution further includes a corrosion inhibitor, and the weight of the corrosion inhibitor is 2% of the weight of the cleaning solution.

[0093] The corrosion inhibitor can be used to reduce the corrosion of the pickling solution on the water tank material.

[0094] In this embodiment, the corrosion inhibitor is thiourea or hexamethylenetetramine, and may be other corrosion inhibitors.

[0095] In this embodiment, the flushing flow rate of the cleaning liquid is 20m 3 / h, the pressure is 0.5MPa.

[0096] By adjusting the pickling liquid flow and pressure, the residence time is controlled and the cleaning effect is enhanced. The dirt on the inner wall of the water tank can be better cleaned through this flushing flow and pressure.

[0097] In this embodiment, the cleaning time of the cleaning solution is 10 hours.

[0098] By maintaining this cleaning time, the inner surface of the water tank can be fully cleaned. The cleaning liquid needs to be precipitated during the circulation process so that the dirt can be removed in time to ensure the effect of each cycle cleaning. In actual application, the specific time depends on the concentration, temperature and degree of dirt of the pickling liquid.

[0099] In this embodiment, after the cleaning liquid is cleaned, clean water is used to rinse the inner wall surface of the steam water tank, and the pH of the clean water rinse liquid is detected in real time. When the pH is neutral, the rinse is terminated.

[0100] After cleaning is completed, the cleaning liquid is discharged from the water tank and the water tank is rinsed with plenty of clean water. By using clean water to rinse the inner wall of the steam water tank, the cleaning liquid can be washed away, thereby avoiding corrosion of the inner wall of the steam water tank by the cleaning liquid. At the same time, the pH of the clean water rinse liquid is detected in real time to know the degree of rinse. The closer the pH is to neutral, the cleaner the rinse.

[0101] For example, after the cleaning is completed, the cleaning liquid is discharged from the water tank, the circulation pump is connected to the water tank, the valve is opened to drain the water, and the water tank is rinsed with a large amount of clean water to remove the residual cleaning liquid and reaction products. The flow rate of the flushing water should be greater than the flow rate of the cleaning liquid, and the flushing time is generally 30 minutes, until the pH value of the flushing water is close to neutral.

[0102] In this embodiment, when cleaning with cleaning liquid, the cleaning is completed when the inner wall surface of the steam water tank is smooth and clean.

[0103] Observe the inner wall of the steam tank to determine whether it is clear and clean.

[0104] After cleaning, the inner wall of the water tank was checked and it was found that the rust had been completely removed and the inner wall of the water tank was smooth and clean. At the same time, the pH value of the flushing water was tested and it was found that the pH value was close to neutral, which met the cleaning requirements.

[0105] Example 4

[0106] During long-term use, the inner wall of the water tank will form dirt and rust due to long-term immersion in water and the precipitation of impurities and minerals in the water, which will affect the normal use of the water tank and the safety of water quality. The traditional cleaning method is manual scrubbing, which is inefficient and difficult to completely remove dirt.

[0107] As a chemical cleaning method, pickling can effectively remove dirt and rust on the inner wall of the water tank. However, the existing pickling method for cleaning the water tank only soaks all the pickling solution in the water tank. On the one hand, this wastes the pickling solution, and on the other hand, the cleaning dirt is retained on the inner wall of the water tank, resulting in low cleaning efficiency.

[0108] In view of this technical problem, this embodiment discloses a method for cleaning a steam water tank, please refer to Figure 1-2 , including the following steps:

[0109] Prepare cleaning liquid, store the cleaning liquid in a liquid tank, pump the cleaning liquid to the inner wall surface of the steam water tank to be cleaned, cover the inner wall surface of the steam water tank, drive the cleaning liquid to circulate and flush the inner wall surface of the steam water tank, so that the cleaning liquid reacts with the dirt on the inner surface until the cleaning is completed.

[0110] Prepare a cleaning liquid that can be used to clean dirt in the steam water tank, that is, it is consistent with the dirt on the inner wall of the steam water tank, so that it can better achieve chemical reaction with the dirt and achieve the cleaning effect; then, use a circulating pump to pump out the cleaning liquid and spray it onto the inner wall of the steam water tank. At this time, ensure that the cleaning liquid can cover the entire inner wall of the water tank, thereby ensuring that the cleaning liquid can continue to fully react with the dirt on the inner wall, which can replace the cleaning liquid immersion method to achieve the cleaning effect.

[0111] Furthermore, during the circulation of the cleaning liquid, the cleaning liquid is also stirred.

[0112] In this embodiment, if the inner wall of the steam water tank is made of stainless steel, the cleaning liquid includes 5% citric acid solution.

[0113] Stainless steel is mainly composed of elements such as iron, chromium, carbon, and sometimes other elements such as nickel, molybdenum, and titanium are added. Therefore, using citric acid solution can better remove dirt without damaging the stainless steel.

[0114] In this embodiment, when preparing the hydrochloric acid solution, the hydrochloric acid is slowly injected into the clean water.

[0115] In order to avoid the generation of white mist during the preparation process and affect the accuracy of the preparation, hydrochloric acid is poured into water for preparation.

[0116] In this embodiment, the cleaning solution further includes a corrosion inhibitor, and the weight of the corrosion inhibitor is 0.5% of the weight of the cleaning solution.

[0117] The corrosion inhibitor can be used to reduce the corrosion of the pickling solution on the water tank material.

[0118] In this embodiment, the corrosion inhibitor is thiourea or hexamethylenetetramine, and may be other corrosion inhibitors.

[0119] In this embodiment, the flushing flow rate of the cleaning liquid is 1m 3 / h, the pressure is 0.2MPa.

[0120] By adjusting the pickling liquid flow and pressure, the residence time is controlled and the cleaning effect is enhanced. The dirt on the inner wall of the water tank can be better cleaned through this flushing flow and pressure.

[0121] In this embodiment, the cleaning time of the cleaning solution is 1 hour.

[0122] By maintaining this cleaning time, the inner wall surface of the water tank can be fully cleaned. The cleaning liquid needs to be precipitated during the circulation process, so that the dirt can be removed in time to ensure the effect of each cycle cleaning. In actual application, the specific time depends on the concentration, temperature and degree of dirt of the pickling liquid.

[0123] In this embodiment, after the cleaning liquid is cleaned, clean water is used to rinse the inner wall surface of the steam water tank, and the pH of the clean water rinse liquid is detected in real time. When the pH is neutral, the rinse is terminated.

[0124] After cleaning is completed, the cleaning liquid is discharged from the water tank and the water tank is rinsed with plenty of clean water. By using clean water to rinse the inner wall of the steam water tank, the cleaning liquid can be washed away, thereby avoiding corrosion of the inner wall of the steam water tank by the cleaning liquid. At the same time, the pH of the clean water rinse liquid is detected in real time to know the degree of rinse. The closer the pH is to neutral, the cleaner the rinse.

[0125] For example, after the cleaning is completed, the cleaning liquid is discharged from the water tank, the circulation pump is connected to the water tank, the valve is opened to drain the water, and the water tank is rinsed with a large amount of clean water to remove the residual cleaning liquid and reaction products. The flow rate of the flushing water should be greater than the flow rate of the cleaning liquid, and the flushing time is generally 15 minutes, until the pH value of the flushing water is close to neutral.

[0126] In this embodiment, when cleaning with cleaning liquid, the cleaning is completed when the inner wall surface of the steam water tank is smooth and clean.

[0127] Observe the inner wall of the steam tank to determine whether it is clear and clean.

[0128] After cleaning, the inner wall of the water tank was checked and it was found that the rust had been completely removed and the inner wall of the water tank was smooth and clean. At the same time, the pH value of the flushing water was tested and it was found that the pH value was close to neutral, which met the cleaning requirements.

[0129] In the above embodiment, after cleaning, the inner wall of the water tank is checked and it is found that the dirt has been completely removed and the inner wall of the water tank is smooth and clean. At the same time, the pH value of the flushing water is tested and it is found that the pH value is close to neutral, which meets the cleaning requirements.

[0130] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0131] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0132] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0133] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0134] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for cleaning a steam water tank, characterized in that: The following steps are involved: Prepare cleaning liquid, store the cleaning liquid in a liquid tank, pump the cleaning liquid to the inner wall surface of the steam water tank to be cleaned, spray and cover the inner wall surface of the steam water tank with the cleaning liquid, drive the cleaning liquid to circulate and flush the inner wall surface of the steam water tank, so that the cleaning liquid reacts with the dirt on the inner surface until the cleaning is completed.

2. The method for cleaning a steam water tank according to claim 1, characterized in that: If the inner wall of the steam water tank is made of stainless steel, the cleaning solution includes 5% to 15% citric acid solution.

3. The method for cleaning a steam water tank according to claim 1, characterized in that: If the inner wall of the steam water box is made of carbon steel, the cleaning liquid includes 10% to 20% hydrochloric acid solution.

4. The method for cleaning a steam water tank according to claim 3, characterized in that: When preparing the hydrochloric acid solution, slowly inject the hydrochloric acid into the clean water.

5. The method for cleaning a steam water tank according to claim 1, characterized in that: The cleaning solution also includes a corrosion inhibitor, and the weight of the corrosion inhibitor is 0.5% to 2% of the weight of the cleaning solution.

6. The method for cleaning a steam water box according to claim 5, characterized in that: The corrosion inhibitor is thiourea or hexamethylenetetramine.

7. The method for cleaning a steam water tank according to claim 1, characterized in that: The flushing flow rate of the cleaning liquid is 1m 3 / h~20m 3 / h, the pressure is 0.2MPa~0.5MPa.

8. The method for cleaning a steam water box according to claim 7, characterized in that: The cleaning time of the cleaning solution is 1 hour to 10 hours.

9. The method for cleaning a steam water tank according to claim 1, characterized in that: After the cleaning with the cleaning liquid is completed, the inner wall surface of the steam water tank is washed with clean water, and the pH of the clean water washing liquid is detected in real time. When the pH is neutral, the washing is ended.

10. The method for cleaning a steam water tank according to claim 1, characterized in that: When cleaning with cleaning fluid, the cleaning is completed when the inner wall surface of the steam water tank is smooth and clean.

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