Cleaning control system and method for steam generation device

Abstract

The invention relates to a cleaning control system and method. The cleaning control system comprises a shell, a dirt carrier, a pressurizing device, a first valve body, a second valve body, a liquid storage container and a control system, the dirt carrier, the pressurizing device, the first valve body, the second valve body, the liquid storage container and the control system are installed in the shell, and the shell comprises a cleaning inlet, a middle sewage draining outlet and a bottom sewage draining outlet; the pressurizing device is arranged between the liquid storage container and the cleaning inlet in a communicating manner; the first valve body is arranged between the middle drain outlet and the liquid storage container in a communicating manner; the second valve body is arranged between the bottom drain outlet and the liquid storage container in a communicating manner; and the pressurizing device, the first valve body and the second valve body are respectively in signal connection with the control system.

Description

Technical Field

[0001] The present application relates to the field of steam generator cleaning, and in particular to a steam generator cleaning control system and method. Background Art

[0002] As a traditional large-capacity evaporator, the horizontal tube full liquid evaporator is widely used in air conditioning refrigeration, heat pump heating, chemical industry and other fields due to its low cost and strong stability. When the evaporator is in operation, the liquid to be evaporated fills the shell side space outside the heat exchange tube (the liquid level is usually slightly higher than the highest point of the heat exchange tube row), and the heat released by the fluid in the tube is transferred to the liquid outside the tube through the tube wall and the fins, causing the liquid to change phase, and the gas generated by boiling heat exchange is discharged from the top of the heat exchanger.

[0003] If the horizontal tube full liquid evaporator is used as a steam generating device, the shell side space outside the heat exchange tube is boiling water, and other heat working fluids are inside the tube. The water is heated by the heat exchange tube to turn it into high-temperature steam. In the high-temperature steam heat pump unit, the steam generator is a device that directly generates steam, and its durability is closely related to the water quality in the shell. When the hardness of the replenishing water is too high, or contains other impurities, due to the concentration effect of water in the steam generator, the unit is prone to scale on the surface of the heat exchange tube after long-term operation. Since the thermal conductivity of the scale is much lower than that of the heat exchange tube material, it will cause the heat exchange performance of the steam generator to deteriorate. Therefore, when the amount of scaling reaches a certain level, the steam generator needs to be chemically cleaned. Chemical cleaning refers to the process of adding a circulating pump externally to pump a solution with chemical agents into the shell and tube to be cleaned for circulation, so that the agent in the solution reacts fully with the scale to achieve the effect of cleaning the scale.

[0004] In the existing methods for cleaning scale, it is impossible to fully clean the heat exchange tubes and the scaled areas on their surfaces, resulting in a large amount of scaled areas remaining on the surfaces of the heat exchange tubes after cleaning. Summary of the invention

[0005] The present application provides a cleaning control method and system for a steam generating device to solve the technical problem in the prior art that the heat exchange tubes and the scaling positions on their surfaces cannot be fully cleaned, resulting in a large amount of scaling remaining on the surfaces of the heat exchange tubes after cleaning.

[0006] The present invention provides a cleaning control system for a steam generating device, wherein the steam generating device comprises a shell and a dirt carrier installed in the shell, and the cleaning control system comprises: a pressurizing device, a first valve body, a second valve body, a liquid storage container and a control system, wherein the shell comprises a cleaning inlet, a middle sewage outlet and a bottom sewage outlet; the pressurizing device is connected and arranged between the liquid storage container and the cleaning inlet; the first valve body is connected and arranged between the middle sewage outlet and the liquid storage container; the second valve body is connected and arranged between the bottom sewage outlet and the liquid storage container; the pressurizing device, the first valve body and the second valve body are respectively connected to the control system signal.

[0007] Wherein, a detector is arranged in the liquid storage container, and the detector is used for real-time monitoring of the chemical agent concentration index of the cleaning liquid in the liquid storage container, and the detector is connected to the control system signal.

[0008] Wherein, a liquid level sensor is arranged in the shell, and the liquid level sensor is used to monitor the arrival signal of the cleaning liquid in the shell; the liquid level sensor is connected to the control system signal.

[0009] The cleaning inlet is located on the first side of the shell, the middle sewage outlet is located on the second side of the shell, and the first side is arranged opposite to the second side.

[0010] Wherein, the bottom sewage outlet is located at the bottom surface of the shell, and the bottom sewage outlet is arranged away from the cleaning inlet.

[0011] The present invention also provides a cleaning control method for a steam generating device, using the above-mentioned cleaning control system, the method comprising:

[0012] Obtaining a cleaning liquid so that the cleaning liquid maintains a first liquid level height in the housing;

[0013] Discharging the cleaning liquid for the first time so that the cleaning liquid flows along a first flow direction and is discharged from the middle drain outlet;

[0014] The cleaning liquid is drained for a second time so that the cleaning liquid flows along a second flow direction and is discharged from the bottom drain port; the first flow direction and the second flow direction are arranged crosswise.

[0015] Wherein, before the step of draining the cleaning liquid for the first time so that the cleaning liquid flows along the first flow direction and is discharged from the middle sewage outlet, the method includes:

[0016] Obtaining a chemical agent concentration index of the detector;

[0017] The concentration change rate was calculated;

[0018] comparing the concentration change rate with a first threshold preset in the control system;

[0019] It is determined that the concentration change rate is lower than the first threshold.

[0020] Among them, in the step of draining the cleaning liquid for the first time so that the cleaning liquid flows along the first flow direction and is discharged from the middle sewage outlet, the cleaning liquid always maintains the first liquid level height, which is the height position of the cleaning liquid above the uppermost row of dirt carriers.

[0021] Wherein, in the step of draining the cleaning liquid for the first time so that the cleaning liquid flows along the first flow direction and is discharged from the middle sewage outlet, the method comprises:

[0022] activating the pressurizing device;

[0023] Controlling the closing of the second valve body;

[0024] The opening of the first valve body is controlled, and the opening of the first valve body is gradually increased until the opening is adjusted to the maximum.

[0025] Wherein, before the step of draining the cleaning liquid for the second time so that the cleaning liquid flows along the second flow direction and is discharged from the bottom drain port, the method comprises:

[0026] Obtaining a chemical agent concentration index of the detector;

[0027] The concentration change rate was calculated;

[0028] comparing the concentration change rate with a first threshold preset in the control system;

[0029] It is determined that the concentration change rate is lower than the first threshold.

[0030] Among them, in the step of draining the cleaning liquid for the second time so that the cleaning liquid flows along the second flow direction and is discharged from the bottom drain port, the cleaning liquid always maintains the first liquid level height, which is the height position of the cleaning liquid above the uppermost row of dirt carriers.

[0031] Wherein, in the step of draining the cleaning liquid for the second time so that the cleaning liquid flows along the second flow direction and is discharged from the bottom drain port, the method comprises:

[0032] activating the pressurizing device;

[0033] Controlling the closing of the first valve body;

[0034] The opening of the second valve body is controlled, and the opening of the second valve body is gradually increased until the opening is adjusted to the maximum.

[0035] Wherein, in the step of obtaining the cleaning liquid so that the cleaning liquid maintains a first liquid level height in the housing, the method comprises:

[0036] activating the pressurizing device;

[0037] Controlling the closing of the first valve body and the second valve body;

[0038] Obtaining an in-place signal from the liquid level sensor;

[0039] Control the opening or closing of the first valve body and / or the second valve body.

[0040] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0041] The cleaning control system and method of the steam generating device provided in the embodiment of the present application are provided with two drain outlets on the shell, namely a middle drain outlet and a bottom drain outlet. The first valve body is used to control the opening and closing of the middle drain outlet and the adjustment of the opening size. The second valve body is used to control the opening and closing of the bottom drain outlet and the adjustment of the opening size. The pressurizing device can pump the cleaning liquid in the liquid storage container into the shell through the cleaning inlet, and the control system can control the opening and closing of the pressurizing device, the first valve body and the second valve body.

[0042] In this way, during the cleaning process, the control system first starts the pressurizing device to pump the cleaning liquid into the shell. At this time, the first valve body and the second valve body are both kept in a closed state so that the cleaning liquid maintains a first liquid level height in the shell. After that, the cleaning liquid in the shell is drained for the first time, the first valve body is opened, and the second valve body is closed, so that the cleaning liquid flows along the first flow direction and is discharged from the middle drain port. After that, the cleaning liquid in the shell is drained for the second time, the second valve body is opened, and the first valve body is closed, so that the cleaning liquid flows along the second flow direction and is discharged from the bottom drain port. Based on the setting positions of the middle drain port and the bottom drain port, a cross-setting relationship between the first flow direction of the cleaning liquid in the shell and the second flow direction of the cleaning liquid in the shell can be formed. In this way, the cleaning liquid can be cleaned in all directions along the circumferential direction of the dirt carrier (exemplarily, the dirt carrier is a heat exchange tube) at 360° without forming a cleaning dead angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0045] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0046] Figure 1 A schematic diagram of the side structure of a steam generating device provided in an embodiment of the present application;

[0047] Figure 2 A schematic diagram of the main structure of a steam generating device provided in an embodiment of the present application;

[0048] Figure 3 A schematic diagram of a cleaning control system provided in an embodiment of the present application, showing a cleaning liquid flow cleaning structure inside a shell that discharges liquid from a central sewage outlet;

[0049] Figure 4 A schematic diagram of a cleaning structure of a cleaning control system provided in an embodiment of the present application, wherein the cleaning liquid flows through a bottom drain port inside the shell;

[0050] Figure 5 A simplified structural diagram of a cleaning control system provided in an embodiment of the present application;

[0051] Figure 6 A schematic diagram of the relationship between the opening of the first valve body and the second valve body and the concentration of the chemical agent in the cleaning control method provided in an embodiment of the present application.

[0052] Description of reference numerals:

[0053] 1. Shell; 2. Heat exchange tube; 3. Pressurizing device; 4. First valve body; 5. Second valve body; 6. Liquid storage container; 7. Support plate;

[0054] 11. Cleaning inlet; 12. Middle sewage outlet; 13. Bottom sewage outlet; 14. Top exhaust port; H. First liquid level height. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0056] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0057] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a change in posture or a change in motion state, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptions used herein have been interpreted accordingly.

[0058] The cleaning control method for a steam generating device provided by the present invention adds a cleaning control system on the basis of the structure of the original steam generating device. Through the setting of the cleaning control system, the flow direction and flow speed of the cleaning liquid in the shell can be adjusted by the control system, thereby achieving the effect of fully cleaning the heat exchange tubes in the shell and the scaling positions on their surfaces.

[0059] Generally speaking, a steam generating device includes a shell and a heat exchange tube installed in the shell, wherein the shell generally has an exhaust port, a drain port and a cleaning inlet. It can be seen that the steam generating device in existing applications generally has only one drain port, and the cleaning process in existing applications is generally: the cleaning liquid is poured into the cleaning inlet, and the drain port is in a closed state at this time, and the cleaning liquid is kept above the heat exchange tube for a preset time, and then the drain port is opened to discharge the cleaning liquid, and the cleaning process can be repeated many times. However, in the existing method of cleaning the shell, the cleaning inlet and the drain port are fixed positions on the shell, and the flow path of the cleaning liquid in the shell is relatively simple, and it always flows from the cleaning inlet to the drain port. In this way, it is impossible to clean all positions on the periphery of the heat exchange tube, and it is easy to leave the problem of cleaning dead corners.

[0060] To alleviate the above problems, refer to Figure 1-Figure 6 The present invention provides a cleaning control system for a steam generating device, comprising a shell 1, a pressurizing device 3, and a liquid storage container 6. Exemplarily, the pressurizing device 3 is a pump body, and the liquid storage container 6 is used to store cleaning liquid. Among them, the shell 1 includes a cleaning inlet 11, a middle sewage outlet 12 and a bottom sewage outlet 13, and the middle sewage outlet 12 and the bottom sewage outlet 13 are respectively connected to the liquid storage container 6. Specifically, the liquid storage container 6 is connected to the cleaning inlet 11 through the pressurizing device 3, and a dirt carrier is installed in the shell 1. The dirt carrier can be understood as a structure that generates dirt on its own structural surface or at the connection position with other structural parts after long-term use. Generally speaking, the surface of metal structural parts and the welding corners are prone to dirt. Exemplarily, the dirt carrier is a heat exchange tube 2, and the heat exchange tube 2 is installed in the shell 1 through a support plate 7. Exemplarily, the cleaning inlet 11 is set higher than the middle sewage outlet 12, and the cleaning inlet 11 is set higher than the top surface of the dirt carrier. In addition, the cleaning control system of the present invention further comprises a first valve body 4 and a second valve body 5. For example, the first valve body 4 and the second valve body 5 are electronic ball valves. The first valve body 4 can be opened and closed to communicate between the middle sewage outlet 12 and the liquid storage container 6, and the second valve body 5 can be opened and closed to communicate between the bottom sewage outlet 13 and the liquid storage container 6.

[0061] In this way, the cleaning liquid in the liquid storage container 6 can be poured into the shell 1 through the cleaning inlet 11 by the pressurizing device 3. During the initial liquid addition process, the middle drain port 12 and the bottom drain port 13 are both closed, and the contact surface of the cleaning liquid relative to the heat exchange tube 2 is almost static and is immersed and cleaned in a longitudinally superimposed contact surface manner. Finally, the cleaning liquid can completely immerse the heat exchange tube 2. In this state, the cleaning liquid can be at a first liquid level height H position, and the first liquid level height H position can be understood as being higher than the preset range value domain of the uppermost position of the heat exchange tube 2. The present invention does not limit the preset range value domain, as long as it can ensure that the top surface of the heat exchange tube 2 does not protrude from the surface of the cleaning liquid.

[0062] When the middle drain port 12 is opened and the bottom drain port 13 is closed, the flow direction of the cleaning liquid relative to the heat exchange tube 2 is from one side of the heat exchange tube 2 to the other side of the heat exchange tube 2, which is the first flow direction. Finally, the cleaning liquid is discharged from the middle drain port 12. The first flow direction, combined with the setting position of the middle drain port 12, forms a cleaning mode in which the cleaning liquid crosses the heat exchange tube 2 in the shell 1 in the lateral direction. The control system can adjust the flow direction of the cleaning liquid in the shell 1 by controlling the opening and closing of the first valve body 4 or the second valve body 5. The control system can further adjust the discharge speed and discharge volume of the middle drain port 12 by controlling the opening range of the first valve body 4. The control system can further adjust the discharge speed and discharge volume of the bottom drain port 13 by controlling the opening range of the second valve body 5.

[0063] Specifically, a detector (not shown in the figure) is set in the liquid storage container 6. The present invention does not specifically limit the detector, as long as it can be used to monitor the chemical agent concentration index of the cleaning liquid in the liquid storage container 6 in real time. Exemplarily, the chemical agent concentration index can be parameters such as total alkalinity and conductivity. In this way, the control system is respectively connected to the pressure device 3, the detector, the first valve body 4 and the second valve body 5 by signal. The control system can directly control the opening and closing of the pressure device 3. The control system can receive the chemical agent concentration index sent by the detector in real time, and obtain the concentration change rate by calculation. The control system is preset with a first threshold value, which is a standard concentration change rate range or a standard concentration change value. The control system can compare the concentration change rate with the first threshold value. According to the comparison result, the control system can control the opening adjustment of the first valve body 4 and the second valve body 5. In this way, the discharge speed and discharge amount of the middle sewage outlet 12 and the bottom sewage outlet 13 are adjusted by the control system to further ensure that the utilization rate of a single cleaning liquid reaches the highest, or to ensure that the cleaning degree of the dirt on the surface of the heat exchange tube 2 by the cleaning liquid reaches the highest.

[0064] In this embodiment, a liquid level sensor (not shown in the figure) is arranged in the housing 1, and the liquid level sensor is used to monitor the arrival signal of the cleaning liquid and send the arrival signal to the control system.

[0065] In this way, the control system receives the arrival signal from the liquid level sensor and sends a command signal to the pressurizing device to continue starting and opening and closing the first valve body or the second valve body, or the control system sends a command to control the opening of the first valve body or the second valve body, thereby facilitating the control system to switch and combine the horizontal and vertical flow cleaning control modes.

[0066] In this embodiment, the shell inlet is located on the first side of the shell, the middle sewage outlet 12 is located in the middle area of ​​the second side of the shell 1, and the second side is arranged opposite to the first side.

[0067] In this way, it can be ensured that the middle drain port 12 and the cleaning inlet 11 are arranged on two opposite sides of the shell 1. When the middle drain port 12 is opened and the bottom drain port 13 is closed, the flow direction of the cleaning liquid relative to the heat exchange tube 2 is from one side of the heat exchange tube 2 to the other side of the heat exchange tube 2, which is the first flow direction. Finally, the cleaning liquid is discharged from the middle drain port 12. The first flow direction, combined with the setting position of the middle drain port 12, forms a cleaning mode in which the cleaning liquid crosses the heat exchange tube 2 in the lateral direction in the shell 1. The first flow direction is opposite to the flow direction of the initial liquid addition, and can perform 360° flow dynamic cleaning on the circumferential outer surface of the heat exchange tube 2.

[0068] In this embodiment, the bottom drain outlet 13 is disposed at the bottom of the shell 1 , and the bottom drain outlet 13 is disposed at a position away from the cleaning inlet 11 .

[0069] In this way, when the bottom drain port 13 is opened and the middle drain port 12 is closed, the flow direction of the cleaning liquid relative to the heat exchange tube 2 is the second flow direction, and the second flow direction is that the cleaning liquid can flow from the top surface of the heat exchange tube 2 to the bottom surface of the heat exchange tube 2, that is, the second flow direction is vertically passing over the heat exchange tube 2 in the longitudinal direction, and finally, the cleaning liquid is discharged from the bottom drain port 13. The second flow direction is arranged crosswise with the first flow direction, and the cross arrangement here includes a vertical arrangement or a nearly vertical arrangement or a state of forming an angle, so that under the cleaning mode setting of the second flow direction, the circumferential outer surface of the heat exchange tube 2 can be dynamically cleaned from top to bottom.

[0070] In summary, in the cleaning control system provided by the present invention, the steam generating device includes a shell 1 and a heat exchange tube 2 installed in the shell 1. Based on this, the cleaning control system includes: a pressurizing device 3, a first valve body 4, a second valve body 5, a detector, a liquid level sensor, a liquid storage container 6 and a control system. The shell 1 includes a cleaning inlet 11, a middle sewage outlet 12 and a bottom sewage outlet 13; the pressurizing device 3 is connected and arranged between the liquid storage container 6 and the cleaning inlet 11; the first valve body 4 is connected and arranged between the middle sewage outlet 12 and the liquid storage container 6; the second valve body 5 is connected and arranged between the bottom sewage outlet 13 and the liquid storage container 6; the pressurizing device 3, the first valve body 4, and the second valve body 5 are respectively connected to the control system signal. The detector is arranged in the liquid storage container 6, and the detector is connected to the control system signal. The liquid level sensor is installed in the shell 1, which is used to monitor the arrival signal of the cleaning liquid and send the arrival signal to the control system. After receiving the arrival signal, the control system sends an instruction to control the opening and closing of the first valve body 4 and the second valve body 5. During this process, the pressurizing device 3 is always in an open state. The cleaning inlet 11 is located on the first side of the housing 1, and the middle drain outlet 12 is located on the second side of the housing 1, and the first side and the second side are arranged opposite to each other. In this way, it can be ensured that the cleaning liquid in the housing 1 can flow in the horizontal direction in the housing 1 and flow out through the middle drain outlet 12. The bottom drain outlet 13 is located on the bottom surface of the housing 1, and the bottom drain outlet 13 is arranged away from the cleaning inlet 11. In this way, it can be ensured that the cleaning liquid in the housing 1 can flow in the longitudinal direction in the housing 1 and flow out through the bottom drain outlet 13.

[0071] During the cleaning process, the control system first starts the pressurizing device 3 to pump the cleaning liquid into the shell 1. At this time, the first valve body 4 and the second valve body 5 are both kept in a closed state so that the cleaning liquid maintains a first liquid level height H in the shell 1. After that, the cleaning liquid in the shell 1 is drained for the first time. The control system controls the first valve body 4 to open and the second valve body 5 to close so that the cleaning liquid flows along the first flow direction and is discharged from the middle drain port 12. After that, the cleaning liquid in the shell 1 is drained for the second time. The control system controls the second valve body 5 to open and the first valve body 4 to close so that the cleaning liquid flows along the second flow direction and is discharged from the bottom drain port 13. Based on the setting positions of the middle drain port 12 and the bottom drain port 13, a cross-setting relationship between the first flow direction of the cleaning liquid in the shell 1 and the second flow direction of the cleaning liquid in the shell 1 can be formed. In this way, the cleaning liquid can be cleaned in all directions along the circumferential direction of the heat exchange tube 2 at 360° without forming a cleaning dead angle.

[0072] Based on the above cleaning control system, the present invention also provides a cleaning control method, which can adjust the opening of the first valve body 4 and the second valve body 5 through the control system to achieve free adjustment of the flow direction of the cleaning liquid in the shell 1, and at the same time monitor the cleaning effect to achieve the best cleaning effect.

[0073] Considering that when the amount of dirt on the surface of the heat exchange tube 2 is small, the steam generating device may be drained once by a transverse flow and once by a longitudinal flow.

[0074] The cleaning control method provided by the present invention comprises:

[0075] The cleaning liquid is obtained so that the cleaning liquid maintains a first liquid level H in the shell 1 ; illustratively, the first liquid level H is a liquid level position higher than the topmost surface of the heat exchange tube 2 in the shell 1 .

[0076] Discharging the cleaning liquid for the first time so that the cleaning liquid flows along the first flow direction and is discharged from the middle drain port 12;

[0077] The cleaning liquid is drained for the second time, so that the cleaning liquid flows along the second flow direction and is discharged from the bottom sewage outlet 13; wherein the first flow direction and the second flow direction are arranged crosswise.

[0078] In this way, the cleaning control method of the present invention is adopted to pump the cleaning liquid into the shell 1. At this time, the first valve body 4 and the second valve body 5 are both kept in a closed state, so that the cleaning liquid maintains the first liquid level height H in the shell 1. After that, the cleaning liquid in the shell 1 is discharged for the first time, the first valve body 4 is opened, and the second valve body 5 is closed, so that the cleaning liquid flows along the first flow direction and is discharged from the middle drain port 12. After that, the cleaning liquid in the shell 1 is discharged for the second time, the second valve body 5 is opened, and the first valve body 4 is closed, so that the cleaning liquid flows along the second flow direction and is discharged from the bottom drain port 13. Based on the setting positions of the middle drain port 12 and the bottom drain port 13, a cross-setting relationship between the first flow direction of the cleaning liquid in the shell 1 and the second flow direction of the cleaning liquid in the shell 1 can be formed. In this way, the cleaning liquid can be cleaned in all directions along the circumferential direction of the heat exchange tube 2 at 360° without forming a cleaning dead angle.

[0079] Considering that the cleaning liquid is obtained in the housing 1 so that the cleaning liquid maintains a first liquid level H in the housing 1, the cleaning liquid can be automatically controlled by the control system, and the method includes:

[0080] Starting the pressurizing device 3 can make the cleaning liquid flow into the housing 1 through the cleaning inlet 11;

[0081] Control the closing of the first valve body 4 and the second valve body 5 to avoid wasting of cleaning liquid;

[0082] Obtain the arrival signal of the liquid level sensor;

[0083] Control the opening or closing of the first valve body 4 and / or the second valve body 5.

[0084] In this way, the cleaning process of the present invention can provide the prerequisite that the heat exchange tube 2 is fully immersed in liquid, and the formation of this condition is automatically controlled by the control system. Further, according to the needs of the existing scene, a horizontal or vertical flow cleaning mode can be selected, and of course, the two modes can be used alternately.

[0085] Under the premise of obtaining the cleaning solution in a full liquid state, the control system is used to realize the automatic control function of the first discharge of the cleaning solution.

[0086] The cleaning control method of the present invention comprises:

[0087] Obtain cleaning liquid so that the cleaning liquid maintains a first liquid level H in the shell 1; illustratively, the first liquid level H is a height position of the cleaning liquid above the uppermost row of heat exchange tubes 2;

[0088] Obtain the chemical agent concentration index of the detector;

[0089] The concentration change rate was calculated;

[0090] comparing the concentration change rate with a first threshold value preset in the control system;

[0091] Determine that the concentration change rate is lower than the first threshold value; illustratively, this constitutes a conditional restriction for automatically controlling the middle sewage outlet 12 to discharge liquid for the first time, which can be understood as when the concentration change rate is lower than the first threshold value, execute the next step;

[0092] The cleaning liquid is drained for the first time, so that the cleaning liquid flows along the first flow direction and is discharged from the middle drain port 12; illustratively, during the first drainage process, the cleaning liquid always maintains a first liquid level height H, and the first liquid level height H is the height position of the cleaning liquid above the uppermost row of heat exchange tubes 2, so that it can be ensured that the dirt carrier is completely immersed in the cleaning liquid;

[0093] The cleaning liquid is drained for the second time so that the cleaning liquid flows along the second flow direction and is discharged from the bottom sewage outlet 13; the first flow direction and the second flow direction are arranged crosswise.

[0094] In this way, the control system obtains the first chemical agent concentration index of the detector, and calculates the first concentration change rate through different multiple first chemical agent concentration indexes at consecutive time points, compares the first concentration change rate with the first threshold, and obtains the comparison result through calculation. According to the comparison result, the control system indicates that the first drainage can be performed. In this embodiment, the first drainage and the second drainage can be manually adjusted in the opening and closing state and the opening degree. Further, by adopting the cleaning control method of this embodiment, the heat exchange tube 2 is always immersed in the cleaning liquid during the cleaning process, and no uncleaned dirt will remain.

[0095] Considering that the first discharge is the discharge of the cleaning liquid through the middle sewage outlet 12, in order to automatically control the first discharge process, the cleaning control method of this embodiment includes:

[0096] Obtain cleaning liquid so that the cleaning liquid maintains a first liquid level H in the shell 1; illustratively, the first liquid level H is a height position of the cleaning liquid above the uppermost row of heat exchange tubes 2;

[0097] Obtain the chemical agent concentration index of the detector;

[0098] The concentration change rate was calculated;

[0099] comparing the concentration change rate with a first threshold value preset in the control system;

[0100] Determine that the concentration change rate is lower than the first threshold value; illustratively, this constitutes a conditional restriction for automatically controlling the middle sewage outlet 12 to discharge liquid for the first time, which can be understood as when the concentration change rate is lower than the first threshold value, execute the next step;

[0101] Start the pressurizing device 3;

[0102] Controlling the closing of the second valve body 5;

[0103] The opening of the first valve body 4 is controlled, and the opening of the first valve body 4 is gradually increased until the opening is adjusted to the maximum; in this way, the first discharge of the cleaning liquid can be achieved, so that the cleaning liquid flows along the first flow direction and is discharged from the middle sewage outlet 12; illustratively, during the first discharge process, the cleaning liquid always maintains a first liquid level height H, and the first liquid level height H is the height position of the cleaning liquid above the uppermost row of heat exchange tubes 2, so that it can be ensured that the dirt carrier can be completely immersed in the cleaning liquid, and the dirt carrier can be fully cleaned;

[0104] The cleaning liquid is drained for a second time so that it flows along the second flow direction and is discharged from the bottom drain port 13. In this embodiment, the second drainage can be achieved by manually adjusting the opening of the second valve body 5; illustratively, the first flow direction and the second flow direction are arranged crosswise.

[0105] In this way, the control system obtains the first chemical agent concentration index of the detector, and calculates the first concentration change rate through different multiple first chemical agent concentration indexes at consecutive time points, compares the first concentration change rate with the first threshold value, and obtains the comparison result through calculation. According to the comparison result, the control system sends a start instruction to the first valve body 4 to implement the first drainage process. Further, by adopting the cleaning control method of this embodiment, the heat exchange tube 2 is always immersed in the cleaning liquid during the cleaning process, and no uncleaned dirt will remain. In addition, in this embodiment, the second drainage can be carried out after the first drainage continues for a preset period of time, and the second drainage can be adjusted manually.

[0106] Under the premise of obtaining the cleaning solution in a full liquid state, the control system is used to realize the control function of fully automatic first discharge of the cleaning solution and instruct the second discharge of the cleaning solution.

[0107] The cleaning control method of the present invention comprises:

[0108] Obtaining cleaning liquid so that the cleaning liquid maintains a first liquid level height H in the housing 1;

[0109] Obtaining a first chemical agent concentration indicator of the detector;

[0110] Calculating a first concentration change rate;

[0111] comparing the first concentration change rate with a first threshold value preset in the control system;

[0112] Determine that the first concentration change rate is lower than the first threshold value; illustratively, this constitutes a conditional restriction for automatically controlling the middle sewage outlet 12 to discharge liquid for the first time, which can be understood as when the first concentration change rate is lower than the first threshold value, execute the next step;

[0113] Start the pressurizing device 3;

[0114] Controlling the closing of the second valve body 5;

[0115] Control the opening of the first valve body 4 and gradually increase the opening of the first valve body 4 until the opening is adjusted to the maximum; in this way, the cleaning liquid can be discharged for the first time, so that the cleaning liquid flows along the first flow direction and is discharged from the middle drain outlet 12;

[0116] Obtaining a second chemical agent concentration indicator of the detector;

[0117] Calculating a second concentration change rate;

[0118] comparing the second concentration change rate with a first threshold value preset in the control system;

[0119] Determine that the second concentration change rate is lower than the first threshold value; illustratively, this constitutes a conditional restriction for automatically controlling the middle sewage outlet 12 to discharge liquid for the second time, which can be understood as when the second concentration change rate is lower than the first threshold value, execute the next step;

[0120] Exemplarily, the next step may be an execution instruction or a prompt instruction. An execution instruction is an execution instruction directly issued by the control system to the actuator, including a clear instruction to open or close or to open the speed or angle range; a prompt instruction is display information sent by the control system to a display panel such as a display screen, prompting that the cleaning liquid in the shell needs to be drained for a second time.

[0121] In this way, the control system obtains the first chemical concentration index of the detector, and calculates the first concentration change rate through multiple different first chemical concentration indexes at consecutive time points, compares the first concentration change rate with the first threshold, and obtains the comparison result through calculation. According to the comparison result, the control system sends a start instruction to the first valve body 4 to realize the automatic control process of the first discharge. The control system obtains the second chemical concentration index of the detector, and calculates the second concentration change rate through multiple different second chemical concentration indexes at consecutive time points, compares the second concentration change rate with the first threshold, and obtains the comparison result through calculation. According to the comparison result, the control system sends an execution instruction or a prompt instruction to realize the process of the second discharge. Then, two cleaning modes with two flow directions are realized. During the cleaning process, the heat exchange tube 2 is always immersed in the cleaning liquid, and no uncleaned dirt will remain.

[0122] Under the premise of obtaining the cleaning solution in a full liquid state, the control system is used to realize the fully automated first and second discharge control functions of the cleaning solution.

[0123] The cleaning control method of the present invention comprises:

[0124] Obtaining cleaning liquid so that the cleaning liquid maintains a first liquid level height H in the housing 1;

[0125] Obtaining a first chemical agent concentration indicator of the detector;

[0126] Calculating a first concentration change rate;

[0127] comparing the first concentration change rate with a first threshold value preset in the control system;

[0128] Determine that the first concentration change rate is lower than the first threshold value; illustratively, this constitutes a conditional restriction for automatically controlling the middle sewage outlet 12 to discharge liquid for the first time, which can be understood as when the first concentration change rate is lower than the first threshold value, execute the next step;

[0129] Start the pressurizing device 3;

[0130] Controlling the closing of the second valve body 5;

[0131] Control the opening of the first valve body 4 and gradually increase the opening of the first valve body 4 until the opening is adjusted to the maximum; in this way, the cleaning liquid can be discharged for the first time, so that the cleaning liquid flows along the first flow direction and is discharged from the middle drain outlet 12;

[0132] Obtaining a second chemical agent concentration indicator of the detector;

[0133] Calculating a second concentration change rate;

[0134] comparing the second concentration change rate with a first threshold value preset in the control system;

[0135] Determine that the second concentration change rate is lower than the first threshold value; illustratively, this constitutes a conditional restriction for automatically controlling the middle sewage outlet 12 to discharge liquid for the second time, which can be understood as when the second concentration change rate is lower than the first threshold value, execute the next step;

[0136] Start the pressurizing device 3;

[0137] Controlling the closing of the first valve body 4;

[0138] The opening of the second valve body 5 is controlled, and the opening of the second valve body 5 is gradually increased until the opening is adjusted to the maximum; in this way, the cleaning liquid can be discharged for the second time, so that the cleaning liquid flows along the second flow direction and is discharged from the bottom sewage outlet 13; illustratively, during the second discharge process, the cleaning liquid always maintains the first liquid level height H, and the first liquid level height H is the height position of the cleaning liquid above the uppermost row of heat exchange tubes 2 (that is, the dirt carrier); in this way, it can be ensured that the heat exchange tubes 2 can be fully immersed in the cleaning liquid, and the entire surface of the heat exchange tubes 2 can be cleaned without missing any area. The first flow direction and the second flow direction are arranged crosswise.

[0139] In this way, the control system obtains the first chemical concentration index of the detector, and calculates the first concentration change rate through multiple different first chemical concentration indexes at consecutive time points, compares the first concentration change rate with the first threshold, and obtains the comparison result through calculation. According to the comparison result, the control system sends a start instruction to the first valve body 4 to realize the automatic control process of the first discharge. The control system obtains the second chemical concentration index of the detector, and calculates the second concentration change rate through multiple different second chemical concentration indexes at consecutive time points, compares the second concentration change rate with the first threshold, and obtains the comparison result through calculation. According to the comparison result, the control system sends a start instruction to the first valve body 4 to realize the process of the second discharge. Further, by adopting the cleaning control method of this embodiment, the heat exchange tube 2 is always immersed in the cleaning liquid during the cleaning process, and no uncleaned dirt will remain. Further, in this embodiment, the first and second discharges are both automatically controlled, which can shorten the cleaning time, speed up the cleaning efficiency, and enhance the cleaning effect.

[0140] In the cleaning control method of the present invention, the step of obtaining the cleaning liquid can be implemented manually or by an automatic control process; taking the automatic control process as an example, the control system starts the pressurizing device 3, and the pressurizing device 3 pumps the cleaning liquid in the liquid storage container 6 into the shell 1. Exemplarily, the cleaning control system of the present invention also includes a liquid level sensor, and the liquid level sensor is connected to the control system signal. Exemplarily, the liquid level sensor is located at a first liquid level height H of the shell 1. When the cleaning liquid reaches the first liquid level height H, the liquid level sensor sends an in-place signal to the control system, and the control system controls the pressurizing device 3 to close. At the same time, during the first or second drainage process, the control system can start the pressurizing device 3 again to add liquid to the shell 1 to ensure that the cleaning liquid in the shell 1 will not be lower than the uppermost position of the heat exchange tube 2.

[0141] Considering that when the amount of dirt on the surface of the heat exchange tube 2 is large, the steam generating device can be drained multiple times by transverse flow and multiple times by longitudinal flow, that is, the first drainage and the second drainage can be circulated until the requirements are met.

[0142] Below, taking the initial liquid level immersing the heat exchange tube 2 as a reference, the initial cleaning mode of the second flow direction in which the second valve body 5 is fully opened and the first valve body 4 is fully closed is adopted (in this cleaning mode, the cleaning liquid always maintains the first liquid level height H), and the control system obtains the chemical agent concentration of the detector in the liquid storage container 6 in real time and monitors the change of the chemical agent concentration and calculates the concentration change rate. Exemplarily, the indicators that can represent the concentration of the chemical agent are total alkalinity, conductivity and other parameters. Below, taking the conductivity as the indicator of the chemical agent concentration, and the first valve body 4 and the second valve body 5 as electronic ball valves as an example, the cleaning control method of the present invention is further explained.

[0143] The control system obtains the chemical agent concentration index of the detector, obtains the first concentration change rate by calculation, and compares the first concentration change rate with the first threshold value. When the first concentration change rate is lower than the first threshold value, the manual or control system adjusts to reduce the opening of the second valve body 5, opens the first valve body 4, and gradually increases the opening of the first valve body 4. At this time, the flow direction of the cleaning liquid in the shell 1 gradually changes from the second flow direction to the first flow direction. It can be understood that the change in the flow direction of the cleaning liquid in the shell 1 can cause some of the areas (dead zones) that were not cleaned in the previous flow mode to begin to be cleaned. In this process, the data fed back by the detector to the control system will change significantly, and a new concentration change rate, namely the second concentration change rate, is obtained. The second concentration change rate is compared with the first threshold value. When the second concentration change rate is higher than the first threshold value, the second valve body 5 is always kept closed and the first valve body 4 is opened. When the second concentration change rate is lower than the first threshold, the opening of the second valve body 5 is reduced until it is closed, and the opening of the first valve body 4 is increased until it is opened to the maximum, so that the flow direction of the cleaning liquid in the shell 1 can be adjusted from the first flow direction to the second flow direction. In this process, the data fed back to the control system by the detector will also change greatly, and a new concentration change rate, that is, the third concentration change rate, is obtained. The third concentration change rate is compared with the first threshold. When the third concentration change rate is lower than the first threshold, the control system controls the pressurizing device 3 to stop working, and at the same time, the cleaning liquid is discharged through the middle sewage outlet 12 until it is completely discharged. At this point, the entire cleaning process is completed.

[0144] By adopting the cleaning control method of the present invention, the cleaning liquid can realize the conversion of the first flow direction to the second flow direction in the shell 1, that is, the conversion of the horizontal flow cleaning mode to the vertical flow cleaning mode. In this way, the dirt on the surface of the heat exchange tube 2 in the shell 1 can be completely cleaned without any dead corners that cannot be cleaned.

[0145] The cleaning control method of the present invention can adjust the opening of the first valve body 4 and the second valve body 5 through the control system to achieve free adjustment of the flow direction of the cleaning liquid in the shell 1. Below, taking the initial liquid level immersing the heat exchange tube 2 as a reference, an initial cleaning mode of the first flow direction in which the first valve body 4 is fully opened and the second valve body 5 is fully closed is adopted. The control system obtains the chemical concentration of the detector in the liquid storage container 6 in real time, monitors the change in the chemical concentration, and calculates the rate of change of the concentration. Exemplarily, the indicators that can represent the concentration of the chemical are measured as parameters such as total alkalinity and conductivity. Below, taking the indicator of the chemical concentration as conductivity, and the first valve body 4 and the second valve body 5 as electronic ball valves as an example, the cleaning control method of the present invention is further explained.

[0146] The control system obtains the chemical agent concentration index of the detector, obtains the fourth concentration change rate by calculation, and compares the fourth concentration change rate with the first threshold value. When the fourth concentration change rate is lower than the first threshold value, the opening of the first valve body 4 is reduced, the second valve body 5 is opened, and the opening of the second valve body 5 is gradually increased, and the first valve body 4 is gradually closed. At this time, the flow direction of the cleaning liquid in the shell 1 is the second flow direction. It can be understood that the change in the flow direction of the cleaning liquid in the shell 1 can cause some of the areas (dead zones) that were not cleaned in the previous flow mode to begin to be cleaned. In this process, the data fed back by the detector to the control system will change significantly, and a new concentration change rate, namely the fifth concentration change rate, is obtained. The fifth concentration change rate is compared with the first threshold value. When the fifth concentration change rate is higher than the first threshold value, the first valve body 4 is always kept closed and the second valve body 5 is opened. When the fifth concentration change rate is lower than the first threshold, the opening of the first valve body 4 is reduced until it is closed, and the opening of the second valve body 5 is increased until it is opened to the maximum, so that the flow direction of the cleaning liquid in the shell 1 can be adjusted from the second flow direction to the first flow direction. In this process, the data fed back to the control system by the detector will also change greatly, and a new concentration change rate, that is, the sixth concentration change rate, is obtained. The sixth concentration change rate is compared with the first threshold. When the sixth concentration change rate is lower than the first threshold, the control system controls the pressurizing device 3 to stop working, and at the same time, the cleaning liquid is discharged through the middle sewage outlet 12 until it is completely discharged. At this point, the entire cleaning process is completed.

[0147] By adopting the cleaning control method of the present invention, the cleaning liquid can realize the conversion of the second flow direction to the first flow direction in the shell 1, that is, the conversion of the longitudinal flow cleaning mode to the transverse flow cleaning mode. In this way, the dirt on the surface of the heat exchange tube 2 in the shell 1 can be fully cleaned without any dead corners that cannot be cleaned.

[0148] Further, considering that the concentration of the cleaning liquid needs to be higher than the standard value to ensure the cleaning effect, therefore, during the cleaning process, if the concentration of the cleaning liquid is lower than the standard value, chemical liquid can be added to the liquid storage container 6. Exemplarily, a standard value is preset in the control system, and the control system obtains the chemical agent concentration index sent by the detector, and compares the value of the chemical agent concentration index with the standard value. If the value of the chemical agent concentration index is lower than the standard value, the control system starts the liquid adding process. Exemplarily, the liquid storage container 6 has a liquid inlet, and the liquid inlet is connected to the liquid source through a liquid adding valve. The control system is connected to the liquid adding valve signal with a pressure pump. The liquid adding process includes: the control system starts the liquid adding valve to open so that the cleaning liquid can flow from the liquid adding valve to the liquid storage container 6. Or, exemplarily, the liquid storage container 6 is provided with a liquid inlet, and the liquid inlet is connected to the liquid source through a liquid adding valve and a water pump in turn. The liquid adding valve and the water pump are respectively connected to the control system signal, and the control system controls the pressure valve to open, and the control system controls the start of the water pump. Exemplarily, the liquid filling valve in the present invention may be an electronic ball valve, which can conveniently control the opening degree of the valve.

[0149] Exemplarily, the shell 1 of the present invention further includes a top exhaust port 14 , so that the cleaning liquid reacts chemically with dirt on the surface of the heat exchange tube 2 in the shell 1 , and the generated gas can be discharged from the top exhaust port 14 .

[0150] In summary, when the steam generating device is chemically cleaned, the liquid level of the cleaning liquid in the shell 1 is slightly higher than the uppermost drain pipe, that is, the cleaning liquid is at the first liquid level height H. To ensure that the concentration ratio of the water in the shell 1 is not too high, a middle drain port 12 and a bottom drain port 13 are provided on the shell 1, so that sewage can be discharged according to a certain proportion of the water supply. For the convenience of cleaning, a cleaning inlet 11 is also provided on the shell 1.

[0151] The cleaning control method of the present invention adopts a chemical cleaning method. Exemplarily, the chemical cleaning is a mode in which the sewage channel is divided into two modes of flowing in different directions.

[0152] Same pattern Figure 3As shown, in this state, the bottom drain port 13 is closed, the middle drain port 12 is open, and the cleaning liquid (i.e., chemical agent) enters from the cleaning inlet 11 and flows out from the middle drain port 12. In this process, the chemical agent sweeps across the heat exchange tube 2 to clean the surface of the heat exchange tube 2. At this time, the water inlet flow rate should be controlled to control the liquid level to be slightly higher than the uppermost row of heat exchange tubes 2 to ensure that the chemical agent flow path will not short-circuit. It should be noted that the heat exchange tube 2 is only half the height in the shell 1. If the cleaning liquid fills the entire shell 1, most of the liquid will easily flow from the upper part of the heat exchange tube 2 to the middle drain port 12, forming a short circuit. The chemical liquid on the surface of the heat exchange tube 2 is only soaked, and the effect is poor. Therefore, the liquid level of the cleaning liquid is set to be slightly higher than the position of the uppermost row of heat exchange tubes 2 to avoid the occurrence of cleaning short circuits.

[0153] Mode 2 Figure 4 As shown, in this state, the middle drain port 12 is in an open state, the bottom drain port 13 is in a closed state, and the cleaning liquid (chemical agent) enters from the cleaning inlet 11 and then flows out from the bottom drain port 13. In this process, the chemical agent vertically sweeps over the heat exchange tube 2 to clean the surface of the heat exchange tube 2. At the same time, the cleaning inlet 11 and the bottom drain port 13 are arranged opposite to each other (it can be understood as being arranged on the left and right of the shell 1), which can enable the chemical agent to flow axially to a certain extent. At this time, the liquid level height is always maintained at the first liquid level height H. Through the flow direction control of the two modes of horizontal sweeping of the heat exchange tube 2 and vertical sweeping of the heat exchange tube 2, the chemical agent cleans the surface of the heat exchange tube 2 without dead angles, which can avoid the formation of flow dead zones in a single flow direction locally, and the occurrence of residual dirt due to inadequate cleaning.

[0154] like Figure 5 As shown, by changing the opening of the first valve body 4 and the second valve body 5, the cleaning of mode 1 and mode 2 can be freely adjusted. The normal cleaning process is as follows: First, the second valve body 5 is fully opened, the first valve body 4 is fully closed, and the cleaning of mode 2 is performed. The concentration of the chemical agent in the chemical barrel is monitored throughout the process (usually the index that can represent the concentration of the chemical agent, such as total alkalinity, conductivity and other parameters) and the concentration change rate is calculated. When the concentration change rate is lower than the set value A (the A value is determined by the experiment), the opening of the second valve body 5 is reduced and the opening of the first valve body 4 is increased. At this time, due to the change in flow direction, part of the dead zone in the previous flow mode begins to be cleaned, and the rate of decrease of the chemical agent concentration increases again. When the concentration change rate is lower than A again, the opening of the second valve body 5 continues to be reduced, and the opening of the first valve body 4 is increased. Cleaning stops until the first valve body 4 is opened to the maximum, the second valve body 5 is closed, and the concentration change rate is lower than A again. This can effectively clean all dead corners on the shell side and ensure that the heat exchanger will not be damaged by chemicals due to over-cleaning.

[0155] Since the concentration of cleaning agent (cleaning solution) needs to be higher than a certain value to ensure the cleaning effect, if the concentration of the agent in the chemical barrel is too low during cleaning, appropriate amount of agent can be added.

[0156] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0157] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0158] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A cleaning control system, characterized in that: The cleaning control system comprises: a housing, a dirt carrier installed in the housing, a pressurizing device, a first valve body, a second valve body, a liquid storage container and a control system, wherein the housing comprises a cleaning inlet, a middle sewage outlet and a bottom sewage outlet; The pressurizing device is disposed in communication between the liquid storage container and the cleaning inlet; The first valve body is arranged in communication between the middle sewage outlet and the liquid storage container; The second valve body is arranged in communication between the bottom sewage outlet and the liquid storage container; The pressurizing device, the first valve body, and the second valve body are respectively connected to the control system signal.

2. The cleaning control system according to claim 1, characterized in that: A detector is arranged in the liquid storage container, and the detector is used to monitor the concentration index of the chemical agent in the cleaning liquid in the liquid storage container in real time. The detector is connected to the control system signal.

3. The cleaning control system according to claim 1, characterized in that: A liquid level sensor is arranged in the shell, and the liquid level sensor is used to monitor the arrival signal of the cleaning liquid in the shell; the liquid level sensor is connected to the control system signal.

4. The cleaning control system according to claim 1, characterized in that: The cleaning inlet is located on a first side surface of the shell, the middle sewage outlet is located on a second side surface of the shell, and the first side surface is arranged opposite to the second side surface.

5. The cleaning control system according to claim 1, characterized in that: The bottom sewage outlet is located on the bottom surface of the shell, and the bottom sewage outlet is arranged away from the cleaning inlet.

6. A cleaning control method, using the cleaning control system according to any one of claims 1 to 5, characterized in that: The method comprises: Obtaining a cleaning liquid so that the cleaning liquid maintains a first liquid level height in the housing; Discharging the cleaning liquid for the first time so that the cleaning liquid flows along a first flow direction and is discharged from the middle drain outlet; The cleaning liquid is drained for a second time so that the cleaning liquid flows along a second flow direction and is discharged from the bottom drain port; the first flow direction and the second flow direction are arranged crosswise.

7. The cleaning control method according to claim 6, characterized in that: Before the step of draining the cleaning liquid for the first time so that the cleaning liquid flows along the first flow direction and is discharged from the middle sewage outlet, the method includes: Obtaining a chemical agent concentration index of the detector; The concentration change rate was calculated; Comparing the concentration change rate with a preset first threshold; It is determined that the concentration change rate is lower than the first threshold.

8. The cleaning control method according to claim 6, characterized in that: In the step of draining the cleaning liquid for the first time so that the cleaning liquid flows along the first flow direction and is discharged from the middle sewage outlet, the cleaning liquid always maintains the first liquid level height, which is the height position of the cleaning liquid above the uppermost row of dirt carriers.

9. The cleaning control method according to claim 6, characterized in that: In the step of draining the cleaning liquid for the first time so that the cleaning liquid flows along the first flow direction and is discharged from the middle sewage outlet, the method comprises: activating the pressurizing device; Controlling the closing of the second valve body; The opening of the first valve body is controlled, and the opening of the first valve body is gradually increased until the opening is adjusted to the maximum.

10. The cleaning control method according to claim 6, characterized in that: Before the step of draining the cleaning liquid for the second time so that the cleaning liquid flows along the second flow direction and is discharged from the bottom drain port, the method comprises: Obtaining a chemical agent concentration index of the detector; The concentration change rate was calculated; Comparing the concentration change rate with a preset first threshold; It is determined that the concentration change rate is lower than the first threshold.

11. The cleaning control method according to claim 10, characterized in that: In the step of draining the cleaning liquid for the second time so that the cleaning liquid flows along the second flow direction and is discharged from the bottom drain port, the cleaning liquid always maintains the first liquid level height, which is the height position of the cleaning liquid above the uppermost row of dirt carriers.

12. The cleaning control method according to claim 10, characterized in that: In the step of draining the cleaning liquid for the second time so that the cleaning liquid flows along the second flow direction and is discharged from the bottom drain port, the method comprises: activating the pressurizing device; Controlling the closing of the first valve body; The opening of the second valve body is controlled, and the opening of the second valve body is gradually increased until the opening is adjusted to the maximum.

13. The cleaning control method according to claim 6, characterized in that: In the step of obtaining the cleaning liquid so as to maintain the cleaning liquid at a first liquid level in the housing, the method comprises: activating the pressurizing device; Controlling the closing of the first valve body and the second valve body; Obtaining an in-place signal from the liquid level sensor; Control the opening or closing of the first valve body and / or the second valve body.

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