Cleaning device and cleaning method

Abstract

The present invention relates to a cleaning device and a cleaning method. The cleaning device comprises a cleaning tank, a doser, an air flotation device and a heater. The air flotation device passes inert gas into the cleaning tank to remove oxygen and stirs the cleaning liquid by the airflow generated by the inert gas. The pressurization port of the doser is connected to the inert gas, and the inert gas pressurizes the inside of the doser to add medicine into the cleaning tank. Since the inert gas is passed into the doser, the entry of oxygen caused by the pressure change caused by the reduction of the medicine amount during the dosing process is avoided, and the influence of oxygen on the cleaning solution is avoided. The heater is arranged on the heating circuit and the cleaning circuit at the same time. The cleaning liquid is heated by the heating circuit before cleaning, and the cleaning liquid is kept warm during the cleaning process to ensure the working temperature of the cleaning liquid when the cleaning device is used, thereby achieving a good cleaning effect. By using the cleaning device of the present invention, the influence of oxygen on the cleaning liquid can be effectively avoided, and the cleaning liquid can be ensured to clean the components to be cleaned at the working temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment equipment, and in particular to a cleaning device and a cleaning method. Background Art

[0002] Distilled water machines generally operate at high temperature and low pressure. The stainless steel of the equipment is affected by high heat. When operating at high temperatures above 85°C for a long time, the passivation film on the surface of the stainless steel is easily damaged, resulting in the precipitation of iron from the stainless steel, which is electrochemically corroded by hydrogen ions and hydroxide ions in the water, forming surface pitting. Undetectable ions in purified water, such as phosphorus, silicon, potassium ions, ions on the surface of stainless steel, and organic oxides remaining from incomplete surface treatment of stainless steel, are easily formed into red oxides when heated at high temperatures, commonly known as red rust. This red rust will seriously affect the water quality of the distilled water machine. Therefore, it is necessary to remove the red rust on the surface of stainless steel.

[0003] However, it is difficult for traditional stainless steel red rust removal devices to completely remove the red oxide on stainless steel, and the removal effect is still unsatisfactory. Summary of the invention

[0004] Based on this, it is necessary to provide a cleaning device and a cleaning method that can improve the cleaning effect.

[0005] The present invention provides a cleaning device, comprising:

[0006] A cleaning tank for loading cleaning fluid;

[0007] A doser, the doser having a discharge port and a pressurizing port, the discharge port of the doser being connected to the doser port of the cleaning tank; the pressurizing port of the doser being used to be connected to a high-pressure inert gas, so that the cleaning agent in the doser is pushed into the cleaning tank under the action of the high-pressure inert gas;

[0008] An air flotation device, the air flotation device is arranged in the cleaning tank, the air flotation device has an air inlet and an air outlet, the air inlet of the air flotation device is used to connect the inert gas, and the air outlet of the air flotation device is used to pass the inert gas into the cleaning liquid; and

[0009] A heater, wherein the liquid inlet of the heater is connected to the liquid outlet of the cleaning tank, and the liquid outlet of the heater is connected to the first liquid inlet of the cleaning tank, so that a heating circuit for the cleaning liquid is formed between the heater and the cleaning tank; the liquid outlet of the heater is used to communicate with one end of the component to be cleaned, and the second liquid inlet of the cleaning tank is used to communicate with the other end of the component to be cleaned, so as to form a cleaning circuit.

[0010] In some embodiments, the air flotation device includes a main body and an air inlet pipe; one end of the air inlet pipe is connected to the main body, and the other end is the air inlet port of the air flotation device, the exhaust port is provided on the main body, and the main body is used to be immersed in the cleaning liquid in the cleaning tank.

[0011] In some embodiments, the body is a disc structure, and the exhaust port is multiple, and the multiple exhaust ports are evenly spaced and distributed on the surface of the body.

[0012] In some embodiments, the main body includes an annular pipe and a first radial pipe, there are multiple exhaust ports, and the multiple exhaust ports are evenly distributed on the annular pipe, one end of the first radial pipe is connected to the annular pipe, and the other end is connected to the intake pipe.

[0013] In some embodiments, there are multiple annular pipes, which are concentrically arranged. The body also includes a second radial pipe, and any two adjacent annular pipes are connected through the second radial pipe.

[0014] In some embodiments, the diameter difference between two adjacent annular pipes is 80 mm to 150 mm.

[0015] In some embodiments, the difference between the inner diameter of the cleaning tank and the diameter of the outermost annular pipe is 200 mm to 400 mm.

[0016] In some embodiments, the cleaning device further comprises a high-pressure inert gas tank, which is connected to the pressurization port of the doser and the air inlet of the air flotation device to provide the high-pressure inert gas to the doser and the air flotation device.

[0017] In some embodiments, the cleaning tank is provided with an exhaust port; the cleaning device further comprises an oxygen detector, which is disposed on the exhaust port at the top of the cleaning tank and is used to detect the oxygen content of the exhaust gas from the cleaning tank.

[0018] In some embodiments, the cleaning tank is provided with a third liquid inlet for connecting to a water source.

[0019] The present invention also provides a cleaning method, characterized in that the cleaning device is used to clean the component to be cleaned, comprising the following steps:

[0020] S1, connecting one end of the component to be cleaned to the liquid outlet of the heater, and the other end to the second liquid inlet of the cleaning tank to form a cleaning circuit;

[0021] S2, adding purified water into the cleaning tank, immersing the main body of the air flotation device in the purified water of the cleaning tank, and introducing inert gas from the air inlet of the air flotation device so that the oxygen content of the gas in the cleaning tank reaches a preset value;

[0022] S3, introducing high-pressure inert gas from the pressurizing port of the doser, and pushing the cleaning agent in the doser into the cleaning tank where the oxygen content of the gas reaches a preset value under the action of the high-pressure inert gas, so as to mix with the purified water to form a cleaning solution;

[0023] S4, continuing to introduce inert gas from the air inlet of the air flotation device, introducing the inert gas into the cleaning liquid from the exhaust port of the air flotation device, and stirring the cleaning liquid;

[0024] S5, circulating the cleaning liquid in the heating loop formed by the cleaning tank and the heater until the temperature reaches a preset temperature; and

[0025] S6. Pass the cleaning liquid that has reached a preset temperature into the cleaning circuit for circulation to clean the components to be cleaned.

[0026] In some embodiments, the component to be cleaned is made of stainless steel; there are multiple types of cleaning agents used to clean the component to be cleaned, and each cleaning agent is used to clean the component to be cleaned in sequence in steps S2 to S6.

[0027] In some embodiments, the plurality of cleaning agents include a pre-treatment solution, a rust removal solution and a passivation solution; and the cleaning agents are used in the order of the pre-treatment solution, the rust removal solution and the passivation solution.

[0028] In some embodiments, the rust removing solution includes at least two types, namely a first rust removing solution and a second rust removing solution;

[0029] The pre-treatment solution includes: 1g / L to 5g / L sodium hydroxide and 0.5g / L to 10g / L sodium phosphate; and / or

[0030] The first rust removal solution comprises 0.5 g / L to 8 g / L nitric acid and 3 g / L to 15 g / L citric acid; and / or

[0031] The second rust removing solution comprises 2g / L to 20g / L oxalic acid, 1g / L to 15g / L sodium dodecyl sulfate, 0.01g / L to 0.5g / L gelatin, 3g / L to 5g / L stabilizer and 5g / L to 10g / L surfactant; and / or

[0032] The passivation solution includes 10g / L to 30g / L of sodium nitrate, 5g / L to 20g / L of nitric acid, 5g / L to 15g / L of citric acid and 2g / L to 10g / L of corrosion inhibitor.

[0033] In some of the embodiments, the cleaning agents further include neutralizing solution; after using the passivating solution to clean the component to be cleaned, the process further includes: using the neutralizing solution to clean the cleaning component; the neutralizing solution includes 0.0005 g / L to 0.005 g / L of sodium carbonate.

[0034] The above-mentioned cleaning device is provided with an air flotation device to pass inert gas into the cleaning tank to remove oxygen in the cleaning liquid and stir the cleaning liquid by the airflow generated by the inert gas. The doser is provided with a pressurizing port, and the doser is pressurized by the inert gas, so that the doser adds cleaning agent into the cleaning tank. Since the inert gas is passed into the doser, the oxygen entry caused by the pressure change caused by the change of the amount of medicine in the doser during the dosing process is avoided, and the influence of oxygen on the cleaning liquid is avoided. The heater is set on the heating circuit and the cleaning circuit at the same time. The cleaning liquid can be heated by the heating circuit before cleaning, and the cleaning agent can be kept warm during the cleaning process to ensure the effect of the cleaning liquid. The above-mentioned cleaning device can effectively avoid the influence of oxygen on the cleaning liquid, and ensure that the cleaning liquid cleans the components to be cleaned at the working temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a cleaning device according to an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of an air flotation device for a cleaning device according to an embodiment of the present invention;

[0037] Figure 3 A stainless steel water production pipeline before cleaning according to an embodiment of the present invention;

[0038] Figure 4 The stainless steel water production pipeline after cleaning according to one embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings below. Preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0045] See also Figure 1 and Figure 2 An embodiment of the present invention provides a cleaning device, including a cleaning tank 1, a dosing device 2, an air flotation device 3 and a heater 4.

[0046] The cleaning tank 1 is used to load the cleaning liquid.

[0047] The doser 2 has a discharge port and a pressurizing port. The discharge port of the doser 2 is connected to the dosing port of the cleaning tank 1. The pressurizing port of the doser 2 is used to connect with the high-pressure inert gas so that the cleaning agent in the doser 2 is pushed into the cleaning tank under the action of the high-pressure inert gas.

[0048] The air flotation device 3 is arranged in the cleaning tank 1 and has an air inlet and an exhaust port. The air inlet of the air flotation device 3 is used to connect the inert gas, and the exhaust port of the air flotation device 3 is used to pass the inert gas into the cleaning liquid.

[0049] The liquid inlet of the heater 4 is connected to the liquid outlet of the cleaning tank 1, and the liquid outlet of the heater 4 is connected to the first liquid inlet of the cleaning tank 1, so that a heating circuit of the cleaning liquid is formed between the heater 4 and the cleaning tank 1; the liquid outlet of the heater 4 is used to communicate with one end of the component 5 to be cleaned, and the second liquid inlet of the cleaning tank 1 is used to communicate with the other end of the component 5 to be cleaned, so as to form a cleaning circuit.

[0050] The above-mentioned cleaning device is provided with an air floater 3 to pass inert gas into the cleaning tank 1 to remove oxygen in the cleaning liquid and stir the cleaning liquid by using the airflow generated by the inert gas. The doser 2 is provided with a pressurizing port to pressurize the inside of the doser 2 by the inert gas, so that the doser 2 adds cleaning agent into the cleaning tank. Since the inert gas is passed into the doser 2, the oxygen is prevented from entering due to the pressure change caused by the change of the amount of medicine in the doser 2 during the dosing process, and the influence of oxygen on the cleaning liquid is avoided. The heater 4 is arranged on the heating circuit and the cleaning circuit at the same time. The cleaning liquid can be heated by the heating circuit before cleaning, and the cleaning liquid can be kept warm during the cleaning process to ensure the effect of the cleaning liquid.

[0051] In some embodiments, the cleaning device further includes a cleaning tank liquid outlet valve 10 , a first heating circuit valve 11 , a second heating circuit valve 12 , a first cleaning circuit valve 13 and a second cleaning circuit valve 14 .

[0052] In actual work, the cleaning tank liquid outlet valve 10, the first heating circuit valve 11 and the second heating circuit valve 12 are opened, and the first cleaning circuit valve 13 and the second cleaning circuit valve 14 are closed. The cleaning liquid is first circulated and heated between the heating circuit formed by the heater 4 and the cleaning tank 1. When the temperature reaches the working temperature and the oxygen content in the cleaning tank 1 meets the working conditions, the first cleaning circuit valve 13 and the second cleaning circuit valve 14 are opened, the first heating circuit valve 11 and the second heating circuit valve 12 are closed, the heating circuit is closed, and the cleaning circuit is opened. The cleaning liquid circulates in the cleaning circuit formed by the component 5 to be cleaned, the heater 4 and the cleaning tank 1 to clean the component 5 to be cleaned.

[0053] In some of the embodiments, a discharge valve 15 is provided on the discharge port of the dosing device 2 , and the discharge valve 15 and the inert gas connected to the pressurization port jointly control the dosing of the dosing device 2 .

[0054] In some embodiments, the air flotation device 3 includes a body 31 and an air inlet pipe 32; one end of the air inlet pipe 32 is connected to the body 31, and the other end is the air inlet of the air flotation device 3, and the exhaust port 314 is provided on the body 31, and the body 31 is used to be immersed in the cleaning liquid in the cleaning tank 1.

[0055] In some embodiments, the body 31 is a disc structure, and there are multiple exhaust ports 314 , which are evenly spaced apart on the surface of the body 31 .

[0056] See also Figure 2 In some embodiments, the body 31 includes a first radial pipe 311 and an annular pipe 312, there are multiple exhaust ports 314, and the multiple exhaust ports 314 are evenly distributed on the annular pipe 312, one end of the first radial pipe 311 is connected to the annular pipe 312, and the other end is connected to the intake pipe 32.

[0057] In some embodiments, there are multiple annular pipes 312, and the multiple annular pipes 312 are concentrically arranged. The body 31 also includes a second radial pipe 313, and any two adjacent annular pipes 312 are connected through the second radial pipe 313. Specifically, there can be multiple second radial pipes 313, and the axial direction of the second radial pipe 313 passes through the concentric centers of the multiple annular pipes 312.

[0058] In some embodiments, the diameter difference between two adjacent annular pipes 312 is 80 mm to 150 mm.

[0059] In some embodiments, the difference between the inner diameter of the cleaning tank 1 and the diameter of the outermost annular pipe 312 is 200 mm to 400 mm.

[0060] In some embodiments, the cleaning device further comprises a high-pressure inert gas tank, which is connected to the pressurization port of the doser 2 and the air inlet of the air flotation device 3 to provide high-pressure inert gas to the doser 2 and the air flotation device 3 .

[0061] In some of the embodiments, the cleaning tank 1 is provided with an exhaust pipe 6 ; the cleaning device further comprises an oxygen detector, which is arranged on the exhaust pipe 6 of the cleaning tank and is used to detect the oxygen content of the exhaust gas of the cleaning tank 1 .

[0062] In some of the embodiments, a temperature gauge and a pressure gauge are provided on the cleaning tank 1 to monitor the temperature and pressure in the cleaning tank.

[0063] In some of the embodiments, a circulation pump 7 is further included; the circulation pump 7 is arranged between the liquid outlet of the cleaning tank 1 and the liquid inlet of the heater 4, and is used to provide power for the cleaning liquid to circulate in the heating circuit and the cleaning circuit at the same time.

[0064] In some of the embodiments, a drain pipe 8 is further provided between the liquid outlet of the cleaning tank 1 and the circulation pump 8 for discharging the liquid in the cleaning device, so as to facilitate the replacement of the cleaning liquid during operation.

[0065] In some embodiments, a drain valve 16 is provided on the drain pipe 8 for controlling the discharge of the cleaning liquid.

[0066] In some embodiments, the cleaning tank 1 is provided with a third liquid inlet for connecting to a water source.

[0067] In some of these embodiments, a water inlet pipe 9 is further included. One end of the water inlet pipe 9 is connected to the third liquid inlet of the cleaning tank 1, and the other end is connected to the water source, for providing water to the cleaning tank 1. Specifically, a water inlet valve 17 is also provided on the water inlet pipe 10.

[0068] In some of the embodiments, the cleaning device is made of stainless steel.

[0069] An embodiment of the present invention further provides a cleaning method, characterized in that the cleaning device is used to clean the component to be cleaned, including the following steps S1 to S6.

[0070] Step S1, connecting one end of the component 5 to be cleaned to the liquid outlet of the heater 4, and the other end to the second liquid inlet of the cleaning tank 1, so as to form a cleaning circuit.

[0071] Step S2, adding purified water into the cleaning tank 1, immersing the main body 31 of the air flotation device 3 in the purified water of the cleaning tank 1, and introducing inert gas from the air inlet of the air flotation device 3 to make the oxygen content of the gas in the cleaning tank 1 reach a preset value.

[0072] Step S3, high-pressure inert gas is introduced from the pressurization port of the doser 2, and the cleaning agent in the doser 2 is pushed into the cleaning tank 1 where the oxygen content of the gas reaches a preset value under the action of the high-pressure inert gas to mix with purified water to form a cleaning solution.

[0073] Step S4, continue to introduce inert gas from the air inlet of the air floater 3, and introduce the inert gas into the cleaning liquid from the exhaust port of the air floater 3, and stir the cleaning liquid.

[0074] Step S5, circulate the cleaning liquid in the heating loop formed by the cleaning tank 1 and the heater 4 until the temperature reaches a preset temperature.

[0075] Step S6: The cleaning liquid reaching the preset temperature is introduced into the cleaning circuit for circulation to clean the component 5 to be cleaned.

[0076] In some embodiments, the above step S1 is performed before step S6, that is, before the cleaning liquid is introduced into the cleaning circuit, the component to be cleaned 5 is connected with the cleaning tank 1 and the heater 4 to form a cleaning circuit.

[0077] In some embodiments, before the component to be cleaned 5 is connected to the cleaning circuit, a step of blowing the component to be cleaned 5 with compressed air is also included. This can ensure that there is no residual water in the component to be cleaned 5 and ensure the cleaning effect of the cleaning liquid.

[0078] In some embodiments, the component to be cleaned 5 is made of stainless steel; there are multiple types of cleaning agents used to clean the component to be cleaned 5, and each cleaning agent is used to clean the component to be cleaned, and steps S2 to S6 are performed in sequence.

[0079] In some embodiments, the multiple cleaning agents include pre-treatment solution, rust removal solution and passivation solution; and the order of using the cleaning agents is pre-treatment solution, rust removal solution and passivation solution. That is, the stainless steel component 5 to be cleaned is cleaned in turn by the pre-treatment solution, rust removal solution and passivation solution, and steps S2 to S6 are performed in turn when each solution is used for cleaning. In other words, when changing the solution to clean the next solution, the previous solution needs to be discharged, and purified water, dosing, stirring and heating steps need to be performed again. In this way, the red rust on the surface of the stainless steel can be effectively removed by cleaning with different solutions, and a passivation film can be formed to prevent the oxidation of the stainless steel surface from producing red rust.

[0080] In some embodiments, the rust removing solution includes at least two types, namely a first rust removing solution and a second rust removing solution;

[0081] The pre-treatment solution includes 1g / L to 5g / L sodium hydroxide and 0.5g / L to 10g / L sodium phosphate; and / or

[0082] The first rust removal solution includes 0.5g / L to 8g / L nitric acid and 3g / L to 15g / L citric acid; and / or

[0083] The second rust removing solution comprises 2g / L-20g / L oxalic acid, 1g / L-15g / L sodium dodecyl sulfate, 0.01g / L-0.5g / L gelatin, 3g / L-5g / L stabilizer and 5g / L-10g / L surfactant; and / or

[0084] The passivation solution includes 10g / L~30g / L sodium nitrate, 5g / L~20g / L nitric acid, 5g / L~15g / L citric acid and 2g / L~10g / L corrosion inhibitor.

[0085] In some embodiments, the steps of cleaning with rust removal solution are:

[0086] Purified water is added to the cleaning tank 1, the main body 31 of the air flotation device 3 is immersed in the purified water of the cleaning tank 1, and an inert gas is introduced from the air inlet of the air flotation device 3 so that the oxygen content of the gas in the cleaning tank 1 reaches a preset value. High-pressure inert gas is introduced from the pressure port of the doser 2, and the first rust-removing liquid is pushed into the cleaning tank 1 where the oxygen content of the gas reaches a preset value under the action of the high-pressure inert gas to mix with the purified water to form a cleaning liquid. Inert gas is continuously introduced from the air inlet of the air flotation device 3, and the inert gas is introduced into the cleaning liquid from the exhaust port 314 of the air flotation device 3, and the cleaning liquid is stirred. The cleaning liquid is circulated in the heating loop formed by the cleaning tank 1 and the heater 4 until the temperature reaches the preset temperature. High-pressure gas is introduced from the pressure port of the doser 2, and the second rust-removing liquid is added to the cleaning tank 1 under the action of the high-pressure inert gas. Inert gas is continuously introduced from the air inlet of the air flotation device 3, and the inert gas is introduced into the cleaning liquid from the exhaust port 314 of the air flotation device 3, and the cleaning liquid is stirred. The evenly stirred cleaning liquid is introduced into the cleaning circuit for circulation to clean the component 5 to be cleaned.

[0087] In some embodiments, the cleaning agent also includes a neutralizing solution; after the passivation solution is used to clean the component 5 to be cleaned, the process further includes: using a neutralizing solution to clean the component to be cleaned; the neutralizing solution includes 0.0005 g / L to 0.005 g / L of sodium carbonate.

[0088] In some embodiments, after each cleaning agent cleans the component 5 to be cleaned, the cleaning device is further cleaned with water. Specifically, after cleaning with the pre-treatment solution, the rust removal solution and the passivation solution, a large amount of purified water is heated to 85°C and cleaned until the pH value in the cleaning tank 1 is above 6. After cleaning with the neutralization solution, a large amount of purified water is heated to 85°C and cleaned until the pH value in the cleaning tank 1 is below 6.

[0089] Specifically, in the pre-treatment solution cleaning step, the preset oxygen content is 1%, and the preset temperature is 85°C; in the rust removal solution cleaning step, the preset oxygen content is 1%, and the preset temperature is 85°C; in the passivation solution cleaning step, the preset oxygen content is 2%, and the preset temperature is 45°C.

[0090] Specifically, in the neutralization solution cleaning step, the preset value of oxygen content is 2%, and the preset temperature is 80°C.

[0091] See also Figure 3 , Figure 4 , are photos of the stainless steel water production pipeline before and after cleaning using the above cleaning method. It can be seen that before cleaning, the surface of the stainless steel water production pipeline has red rust spots and a weak metallic luster; after cleaning using the above cleaning method, the surface of the stainless steel water production pipeline is clean and has a strong metallic luster.

[0092] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A cleaning device, characterized in that: include: A cleaning tank for loading cleaning fluid; A doser, the doser having a discharge port and a pressurizing port, the discharge port of the doser being connected to the doser port of the cleaning tank; the pressurizing port of the doser being used to be connected to a high-pressure inert gas, so that the cleaning agent in the doser is pushed into the cleaning tank under the action of the high-pressure inert gas; An air flotation device, the air flotation device is arranged in the cleaning tank, the air flotation device has an air inlet and an exhaust port, the air inlet of the air flotation device is used to connect the inert gas, and the exhaust port of the air flotation device is used to pass the inert gas into the cleaning liquid; and A heater, wherein the liquid inlet of the heater is connected to the liquid outlet of the cleaning tank, and the liquid outlet of the heater is connected to the first liquid inlet of the cleaning tank, so that a heating circuit of the cleaning liquid is formed between the heater and the cleaning tank; the liquid outlet of the heater is used to communicate with one end of the component to be cleaned, and the second liquid inlet of the cleaning tank is used to communicate with the other end of the component to be cleaned, so as to form a cleaning circuit; The air flotation device comprises a body and an air inlet pipe; one end of the air inlet pipe is connected to the body, and the other end is the air inlet of the air flotation device, the air outlet is arranged on the body, and the body is used to be immersed in the cleaning liquid of the cleaning tank; The cleaning device further comprises a high-pressure inert gas tank, which is connected to the pressurizing port of the doser and the air inlet of the air flotation device to provide the high-pressure inert gas to the doser and the air flotation device; The cleaning tank is provided with an exhaust port; The cleaning device also includes an oxygen detector, which is arranged on the exhaust port at the top of the cleaning tank and is used to detect the oxygen content of the exhaust gas from the cleaning tank.

2. The cleaning device according to claim 1, characterized in that: The main body is a disc structure, and the number of the exhaust ports is multiple, and the multiple exhaust ports are evenly spaced and distributed on the surface of the main body.

3. The cleaning device according to claim 1, characterized in that: The body includes an annular pipe and a first radial pipe, the exhaust ports are multiple and evenly distributed on the annular pipe, one end of the first radial pipe is connected to the annular pipe, and the other end is connected to the intake pipe.

4. The cleaning device according to claim 3, characterized in that: There are multiple annular pipes, which are concentrically arranged. The body also includes a second radial pipe, and any two adjacent annular pipes are connected through the second radial pipe.

5. The cleaning device according to claim 4, characterized in that: The diameter difference between two adjacent annular pipes is 80 mm to 150 mm.

6. The cleaning device according to claim 4, characterized in that: The difference between the inner diameter of the cleaning tank and the diameter of the outermost annular pipe is 200 mm to 400 mm.

7. The cleaning device according to any one of claims 1 to 6, characterized in that: The cleaning tank is provided with a third liquid inlet for connecting to a water source.

8. A cleaning method, characterized in that: Using the cleaning device according to any one of claims 1 to 7 to clean the component to be cleaned comprises the following steps: S1, connecting one end of the component to be cleaned to the liquid outlet of the heater, and the other end to the second liquid inlet of the cleaning tank to form a cleaning circuit; S2, adding purified water into the cleaning tank, immersing the main body of the air flotation device in the purified water of the cleaning tank, and introducing inert gas from the air inlet of the air flotation device so that the oxygen content of the gas in the cleaning tank reaches a preset value; S3, introducing high-pressure inert gas from the pressurizing port of the doser, and pushing the cleaning agent in the doser into the cleaning tank where the oxygen content of the gas reaches a preset value under the action of the high-pressure inert gas, so as to mix with the purified water to form a cleaning solution; S4, continuing to introduce inert gas from the air inlet of the air flotation device, introducing the inert gas into the cleaning liquid from the exhaust port of the air flotation device, and stirring the cleaning liquid; S5, circulating the cleaning liquid in the heating loop formed by the cleaning tank and the heater until the temperature reaches a preset temperature; and S6. Pass the cleaning liquid that has reached a preset temperature into the cleaning circuit for circulation to clean the components to be cleaned.

9. The cleaning method according to claim 8, characterized in that: The component to be cleaned is made of stainless steel. There are multiple types of cleaning agents used to clean the component to be cleaned, and each cleaning agent is used to clean the component to be cleaned, and steps S2 to S6 are performed in sequence.

10. The cleaning method according to claim 9, characterized in that: The various cleaning agents include pre-treatment solution, rust removal solution and passivation solution; and the cleaning agents are used in the order of the pre-treatment solution, the rust removal solution and the passivation solution.

11. The cleaning method according to claim 10, characterized in that: The rust removing liquid medicine comprises at least two kinds, namely a first rust removing liquid medicine and a second rust removing liquid medicine; The pre-treatment solution includes: 1 g / L to 5 g / L sodium hydroxide and 0.5 g / L to 10 g / L sodium phosphate; and / or The first rust removal solution comprises 0.5 g / L to 8 g / L nitric acid and 3 g / L to 15 g / L citric acid; and / or The second rust removing solution comprises 2 g / L to 20 g / L oxalic acid, 1 g / L to 15 g / L sodium dodecyl sulfate, 0.01 g / L to 0.5 g / L gelatin, 3 g / L to 5 g / L stabilizer and 5 g / L to 10 g / L surfactant; and / or The passivation solution includes 10 g / L to 30 g / L of sodium nitrate, 5 g / L to 20 g / L of nitric acid, 5 g / L to 15 g / L of citric acid and 2 g / L to 10 g / L of corrosion inhibitor.

12. The cleaning method according to claim 10 or 11, characterized in that: The cleaning agents also include neutralizing solutions; After the passivation solution is used to clean the component to be cleaned, the method further includes: using the neutralization solution to clean the cleaning component; The neutralizing solution includes 0.0005 g / L to 0.005 g / L of sodium carbonate.

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