CN117824418B - Control method, system, equipment and medium for cleaning scale in pipeline - Google Patents
Control method, system, equipment and medium for cleaning scale in pipeline Download PDFInfo
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Abstract
The application provides a control method, a system, equipment and a medium for cleaning scale in a pipeline, which belong to the technical field of pipelines of a tubular heat exchanger, and the method comprises the following steps: dividing the area of the tube nest heat exchanger pipeline along the axial direction of the tube nest heat exchanger pipeline to obtain a plurality of areas to be cleaned, and obtaining the wall thickness of the area pipeline of the tube nest heat exchanger pipeline in each area to be cleaned; the vibration information database is called to obtain vibration information corresponding to the wall thickness of the pipeline in each area, and the cleaning end is controlled to vibrate in the corresponding area to be cleaned along the axial direction of the pipeline of the tubular heat exchanger according to the vibration information corresponding to the wall thickness of the pipeline in each area, so that the inner scale is impacted in the area to be cleaned, and the inner scale is separated from the inner wall of the pipeline in the area to be cleaned; the method can effectively clean the scale in the pipeline, can not damage the inner wall of the pipeline, and can poke the scale in the pipeline by the cleaning end, so that the method is stronger in controllability, higher in safety and better in cleaning effect.
Description
Technical Field
The application relates to the technical field of pipelines of tubular heat exchangers, in particular to a control method, a system, equipment and a medium for cleaning scale in a pipeline.
Background
At present, in industrial production, a shell and tube heat exchanger is a heat exchanger with wide application, and mainly comprises a shell, a tube bundle, a tube plate, a baffle plate, a seal head and the like, and has good heat transfer effect, large area and simple structure, but the problem of internal scaling can occur in the long-term use process of a pipeline of the shell and tube heat exchanger, if the pipeline is not cleaned timely, the thermal resistance of dirt sediments is higher and higher, and the heat transfer efficiency is greatly reduced.
In the prior art, the current mode of cleaning the pipeline is mainly high-pressure flushing, and particularly, the flexible steel gun (namely, the pressure-resistant hose) with the water mouse spray head is used for cleaning, the high pressure of flushing water can enable inner scaling to be separated from the inner wall of the pipeline, but part of the pipeline is also blocked due to the fact that the scaling in the tube array is hard, the flushing water which is required to flush the inner scaling is very high, the flushing water with ultra-high water pressure can enable back flushing water to splash from the outlet of the pipeline, the safety of operators is threatened, and the inner wall of the pipeline of the heat exchanger can be damaged.
Disclosure of Invention
In view of the foregoing drawbacks or deficiencies of the prior art, the present application is directed to a control method, system, apparatus, and medium for cleaning scale within a tube in a tube array heat exchanger tube.
The first aspect of the application provides a control method for cleaning scale in a pipeline, which is used for controlling a cleaning device to clean the scale in the pipeline of a tubular heat exchanger, wherein the cleaning device at least comprises a cleaning end which can extend into the pipeline of the tubular heat exchanger; the control method comprises the following steps:
Dividing the tubular heat exchanger pipeline into a plurality of areas to be cleaned along the axial direction of the tubular heat exchanger pipeline, and obtaining the wall thickness of the tubular heat exchanger pipeline in each area to be cleaned;
The vibration information database is called to obtain vibration information corresponding to the wall thickness of the pipeline in each area, and the cleaning end is controlled to vibrate in the corresponding area to be cleaned along the axial direction of the pipeline of the tubular heat exchanger according to the vibration information corresponding to the wall thickness of the pipeline in each area, so that the inner scale is impacted to the area to be cleaned, and the inner scale is separated from the inner wall of the pipeline in the area to be cleaned; the vibration information database at least comprises a plurality of groups of pipeline wall thicknesses and vibration information corresponding to each group of pipeline wall thicknesses, wherein the vibration information at least comprises vibration frequency and vibration force of the cleaning device along the axial direction of the pipeline of the tubular heat exchanger.
According to the technical scheme provided by the application, the area division is carried out on the tube of the tubular heat exchanger to obtain a plurality of areas to be cleaned, and the method at least comprises the following steps:
A plurality of groups of first collection point sets are uniformly distributed on the tubular heat exchanger pipeline along the axial direction of the tubular heat exchanger pipeline, and each first collection point set comprises a plurality of collection points distributed in an array along the circumferential direction of the tubular heat exchanger pipeline;
Measuring the wall thickness of the pipeline at each acquisition point by utilizing an ultrasonic detection method, and calculating the circumferential pipeline wall thickness of each group of the first acquisition point set based on the wall thickness of the pipeline at all the acquisition points in the group of the first acquisition point set;
and taking the areas corresponding to the adjacent groups of first acquisition point sets as one area to be cleaned, wherein the absolute value of the difference value between the wall thicknesses of the circumferential pipelines of every two groups of first acquisition point sets in the same area to be cleaned is smaller than or equal to a first preset threshold value.
According to the technical scheme provided by the application, the method for obtaining the regional pipeline wall thickness of the tubular heat exchanger pipeline in each region to be cleaned at least comprises the following steps:
Randomly acquiring a region to be cleaned, dividing the region to be cleaned into a plurality of first regions, and arranging the first regions along the circumferential direction of the region to be cleaned; each first region is internally provided with a plurality of groups of second collection point sets, and each second collection point set comprises a plurality of collection points which are uniformly distributed along the axial direction of the tube array heat exchanger pipeline;
calculating an axial pipeline wall thickness of each group of the second collection points based on the pipeline wall thickness of all the collection points in the second collection points;
Taking the average value of the axial pipeline wall thicknesses of all groups of the second collection points in the same first region as a first pipeline wall thickness of the first region; and the average value of the wall thickness of all the first pipelines in the region to be cleaned is the wall thickness of the pipelines in the region to be cleaned.
According to the technical scheme provided by the application, the cleaning end at least comprises a spray head, and the spray head can spray multiple paths of cleaning water; the cleaning device stretches in from the first opening and moves in the tube array heat exchanger pipeline along the direction that the first opening points to the second opening;
after said impacting said inner scale of said region to be cleaned such that said inner scale is detached from the inner wall of the pipe of said region to be cleaned, the method further comprises the steps of:
acquiring the tightness of the area to be cleaned towards the second opening side;
When the tightness is judged to be smaller than or equal to a second preset threshold value, the spray head is controlled to spray cleaning water with pressure smaller than a first preset pressure;
when the tightness is judged to be larger than a third preset threshold value, the spray head is controlled to spray cleaning water with pressure larger than second preset pressure, and the second preset pressure is larger than the first preset pressure.
According to the technical scheme provided by the application, the method for acquiring the tightness of the to-be-cleaned area towards the second opening side at least comprises the following steps:
acquiring a plurality of reference areas of the to-be-cleaned area, wherein the reference areas are the to-be-cleaned area of the to-be-cleaned area far away from the first opening side;
Obtaining the inner scaling thickness of each reference area based on the wall thickness of all the circumferential pipelines; and obtaining the maximum value of all the inner scaling thicknesses;
and calculating the ratio of the maximum value to the inner diameter of the tube-in-tube heat exchanger, and taking the ratio as the tightness.
According to the technical scheme provided by the application, the vibration information database further comprises a plurality of groups of hardness, and each group of hardness corresponds to a plurality of groups of pipeline wall thicknesses; the area to be cleaned close to the first opening side is a first area to be cleaned;
The method comprises the steps of obtaining the wall thickness of the regional pipeline of the tubular heat exchanger pipeline in each region to be cleaned, wherein the method at least comprises the steps of obtaining the wall thickness of the regional pipeline of the tubular heat exchanger pipeline in a first region to be cleaned;
after obtaining the wall thickness of the regional pipeline of the tubular heat exchanger pipeline in the first region to be cleaned, the method further comprises the following steps:
acquiring the hardness of the inner scale of the first area to be cleaned;
the vibration information database is called to obtain vibration information corresponding to the wall thickness of each regional pipeline, and the method at least comprises the following steps:
and when judging that the hardness is greater than or equal to the first preset hardness, calling the vibration information database to obtain vibration information corresponding to the hardness and the regional pipeline wall thickness.
According to the technical scheme provided by the application, the method for obtaining the hardness of the inner scale of the first area to be cleaned at least comprises the following steps:
Controlling the cleaning end to vibrate along the axial direction of the tube of the tubular heat exchanger by a preset vibration force, pre-striking the inner scale of the first area to be cleaned to obtain vibration times, and obtaining the hardness of the inner scale based on the vibration times; and the vibration times are accumulated vibration times of the cleaning end when the vibration stroke of the cleaning end is changed.
The second aspect of the application provides a control system for cleaning scale in a pipeline, the control system is used for controlling a cleaning device to clean the scale in the pipeline of a tubular heat exchanger, and the cleaning device at least comprises a cleaning end which can extend into the pipeline of the tubular heat exchanger; the control system includes:
The partition module is configured to divide the tubular heat exchanger pipeline into a plurality of areas to be cleaned along the axial direction of the tubular heat exchanger pipeline, and obtain the wall thickness of the tubular heat exchanger pipeline in each area to be cleaned;
the calculation module is configured to retrieve a vibration information database to obtain vibration information corresponding to the wall thickness of each regional pipeline;
The control module is configured to control the cleaning end to vibrate in the corresponding region to be cleaned along the axial direction of the tube of the tubular heat exchanger according to the vibration information corresponding to the wall thickness of the tube in each region, and impact the inner scale of the region to be cleaned to separate the inner scale from the inner wall of the tube in the region to be cleaned; the vibration information database at least comprises a plurality of groups of pipeline wall thicknesses and vibration information corresponding to each group of pipeline wall thicknesses, wherein the vibration information at least comprises vibration frequency and vibration force of the cleaning device along the axial direction of the pipeline of the tubular heat exchanger.
A third aspect of the application provides a terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the control method for in-line scale cleaning as described above when the computer program is executed.
A fourth aspect of the application provides a computer readable storage medium having a computer program which, when executed by a processor, implements the steps of a control method for scale cleaning in a pipeline as described above.
Compared with the prior art, the application has the beneficial effects that: the application divides the tubular heat exchanger pipeline into a plurality of areas to be cleaned, and stretches into each area to be cleaned in turn through the cleaning end of the cleaning device, and applies vibration force and vibration frequency matched with the wall thickness of the area pipeline in the area to be cleaned to the inner scale on the inner wall of the pipeline, so that the inner scale of the pipeline in each area to be cleaned can be poked and fall off; because the vibration information corresponding to each area is matched with the wall thickness of the pipeline in the area, the control method can effectively clean the scale in the pipeline without damaging the inner wall of the pipeline, and the cleaning end of the cleaning device is used for poking the scale in the pipeline.
Drawings
FIG. 1 is a flow chart of the steps of a control method for scale cleaning in a pipeline provided by the application;
FIG. 2 is a schematic diagram of a control system for cleaning scale in a pipeline according to the present application;
fig. 3 is a schematic structural diagram of a terminal device according to the present application;
Fig. 4 is a schematic structural diagram of a cleaning device provided by the application.
The text labels in the figures are expressed as:
1. A spray head; 2. tailoring the pup joint; 3. cleaning machine water gun head; 700. a computer system; 701. a CPU; 702. a ROM; 703. a RAM; 704. a bus; 705. an I/O interface; 706. an input section; 707. an output section; 708. a storage section; 709. a communication section; 710. a driver; 711. removable media.
Detailed Description
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the application are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Example 1
In this embodiment, a device for cleaning scale in a pipeline is provided, the device is disposed at the top of a pipeline of a tubular heat exchanger, and the device at least includes:
The cleaning device at least comprises a cleaning machine water gun head 3, a plurality of special pup joints 2 and a spray head 1 which are connected in sequence along the extending direction of the cleaning device;
optionally, the spray head 1 is a special water mouse head, and the cleaning end comprises the spray head 1 and a special pup joint 2;
the clamping device is used for clamping the cleaning device and is clamped on the side far away from the head of the specially-manufactured water mouse; the axis of the clamped cleaning device is opposite to the axis of the tube-in-tube heat exchanger;
The first driving device is connected with the clamping device and used for driving the clamping device to move along the axial direction of the tube array heat exchanger pipeline so as to drive the cleaning device to vibrate towards the tube array heat exchanger pipeline;
optionally, the first driving device is a cylinder piston assembly.
Further, referring to fig. 4, the inner diameter of the tube of the tubular heat exchanger is often 15mm, the special nipple 2 is made of a stainless steel tube with an inner diameter of 6mm and an outer diameter of 14mm, and is used for lengthening the length of the gun head of the cleaning machine so as to achieve the purpose of enabling the special water mouse head to penetrate into the tube of the tubular heat exchanger, the special water mouse head is made of a material with high hardness, the outer diameter of the special water mouse head is 12mm, in order to avoid damaging the inner wall of the tube in the vibration impact process, the end part of the special water mouse head is in a smooth and slightly arc shape, and when the special water mouse head and the special nipple 2 are processed, the smoothness of the outer surfaces of the special water mouse head and the special nipple 2 needs to be ensured to be at least 4.
If the tube array of the heat exchanger is longer, a plurality of short sections can be manufactured to prolong the water gun head 3 of the cleaning machine, so that the gun head can go deep into the tube array of the heat exchanger, when the blocking position is deeper, the gun head can be dredged in a poking and bumping mode, the gun head can closely contact the intractable scaling position, the pressure of cleaning water is ensured not to be weakened, intractable scaling is more convenient to clean, and the length proposal is not more than half meter each time.
Furthermore, in order to facilitate the installation of the special pup joint 2, two symmetrical grooves are respectively reserved at two ends of the pup joint when the pup joint is manufactured, so that the screw connection is conveniently fastened by using a spanner, and the depth of the grooves is recommended to be 1mm due to the problem of the wall thickness of the material; if the groove is not reserved, the pipe tongs are required to be fastened, but the tiger mouth of the pipe tongs can scratch the surface of the short joint, and then the inner wall can be scratched when the tube array of the heat exchanger is dredged, so that the service life of the heat exchanger is influenced; and the position of the groove is not close to the positions of the internal and external threads at the two ends of the pup joint as much as possible, so that the pup joint is prevented from being broken due to insufficient strength and easy bending.
Furthermore, when a worker performs cleaning operation, a protective cover is additionally arranged on the special pup joint 2, so that safety accidents caused by water pressure recoil and pipe explosion can be effectively prevented, and the safety of the constructor is ensured.
As mentioned in the background art, the present application provides a control method for cleaning scale in a pipeline based on the device for cleaning scale in a pipeline, which is used for controlling a cleaning device to clean scale in a pipeline of a tubular heat exchanger, and referring to fig. 1, the control method comprises the following steps:
S101, dividing the tubular heat exchanger pipeline into a plurality of areas to be cleaned along the axial direction of the tubular heat exchanger pipeline, and obtaining the wall thickness of the tubular heat exchanger pipeline in each area to be cleaned;
S102, a vibration information database is called to obtain vibration information corresponding to the wall thickness of the pipeline in each area, and the cleaning end is controlled to vibrate in the corresponding area to be cleaned along the axial direction of the pipeline of the tubular heat exchanger according to the vibration information corresponding to the wall thickness of the pipeline in each area, so that the inner scale is impacted in the area to be cleaned, and the inner scale is separated from the inner wall of the pipeline in the area to be cleaned; the vibration information database at least comprises a plurality of groups of pipeline wall thicknesses and vibration information corresponding to each group of pipeline wall thicknesses, wherein the vibration information at least comprises vibration frequency and vibration force of the cleaning device along the axial direction of the pipeline of the tubular heat exchanger.
Specifically, the tubular structure of the tubular heat exchanger is a cylindrical tubular structure, and in the long-term use process, inner scaling can occur on the inner wall of the tubular heat exchanger, the inner scaling gradually thickens, and the heat exchange efficiency is reduced more and more, so that the inner scaling needs to be cleaned regularly, and the heat exchange efficiency of the tubular heat exchanger is improved.
Further, the lengths of each two areas to be cleaned may be the same or different along the axial direction of the tube bundle heat exchanger tube, and the wall thickness of the area tube is relatively uniform along the axial direction of the tube bundle heat exchanger tube in one area to be cleaned, and when one area to be cleaned is determined, the wall thickness of the area tube in the area to be cleaned is correspondingly obtained, and the method for dividing the area to be cleaned and how to determine the wall thickness of the area tube in the area to be cleaned is described later.
When cleaning, the tube of the tubular heat exchanger is fixed in the direction vertical to the ground, and the openings at the two ends of the tube are not blocked or shielded by other foreign objects, the inner scale forming at the tube wall can be flushed out from the tube opening at any end by flushing water in a water gun of the cleaning machine, firstly, the inner scale forming at the tube wall is contacted with the inner scale forming at the circumferential direction of the tube to be cleaned and uniformly vibrated off on the premise of coinciding with the axis of the tube after the tube is internally scaled, the relative position of the cleaning end and the tube along the radial direction is not required to be adjusted, so that the cleaning end vibrates along the axial direction of the tube of the tubular heat exchanger, the vibration frequency corresponds to the vibration information of the wall thickness of the tube in the region to be cleaned in the vibration information database, and the outer diameter of the cleaning end is small in the size gap with the inner diameter of the tube.
Further, in a specific scene, the inner scale is thicker, the special water mouse head can contact the inner scale and strike, in another specific scene, the inner scale is thinner, because the outer diameter of the special water mouse head is smaller than that of the special nipple 2, the special water mouse head does not contact the inner scale, and the special nipple 2 contacts the inner scale and strikes, so that the special water mouse head and the special nipple 2 are required to completely meet the use requirement in terms of strength.
The method comprises the steps of obtaining vibration information corresponding to each group of pipeline wall thickness of a vibration information database through a training model, obtaining a sample set under parameters corresponding to a pipeline of a tubular heat exchanger and a cleaning device in the training model process, wherein the sample set at least comprises a plurality of groups of pipeline wall thickness sample sets, and in each group of pipeline wall thickness of the pipeline, the inner wall of the pipeline can be smoothly bumped without damage due to poking by using the maximum value of vibration force and the maximum value of vibration frequency, the method of obtaining the first condition is to take the first condition table, the first condition table at least comprises the inner wall thickness, the maximum value of vibration force and the maximum value of vibration frequency, the maximum value of vibration frequency can be bumped into the inner wall of the pipeline, the scaling can be prevented from being damaged due to the fact that the inner wall thickness of the pipeline is large, the corresponding vibration information is used as an input, the initial model is trained, and the vibration model is used for obtaining data in the vibration information database.
In an optional embodiment, the dividing the area of the tube of the tubular heat exchanger to obtain a plurality of areas to be cleaned at least includes the following steps:
A plurality of groups of first collection point sets are uniformly distributed on the tubular heat exchanger pipeline along the axial direction of the tubular heat exchanger pipeline, and each first collection point set comprises a plurality of collection points distributed in an array along the circumferential direction of the tubular heat exchanger pipeline;
Measuring the wall thickness of the pipeline at each acquisition point by utilizing an ultrasonic detection method, and calculating the circumferential pipeline wall thickness of each group of the first acquisition point set based on the wall thickness of the pipeline at all the acquisition points in the group of the first acquisition point set;
and taking the areas corresponding to the adjacent groups of first acquisition point sets as one area to be cleaned, wherein the absolute value of the difference value between the wall thicknesses of the circumferential pipelines of every two groups of first acquisition point sets in the same area to be cleaned is smaller than or equal to a first preset threshold value.
Specifically, the first collection point set is a collection point set surrounding the circumference of the pipeline, the distance between every two first collection point sets is adapted to the total length of the pipeline, the calculation amount cannot be increased due to the fact that the first collection point set is too short, and the calculation amount cannot be increased due to the fact that the first collection point set is too long, and the inner scaling in the same area to be cleaned cannot be guaranteed to be relatively uniform due to the fact that the first collection point set is too long; the wall thickness of the pipeline is an inner scaling thickness, namely the difference value of the integral wall thickness of the pipeline obtained by an ultrasonic detection method minus the wall thickness of the pipeline body, wherein the wall thickness of the pipeline body can be obtained by inquiring factory parameters of the shell-and-tube heat exchanger.
Optionally, the circumferential pipe wall thickness of the first collection of collection points is an average of the pipe wall thicknesses at all of the collection points in the set of first collection points.
After the wall thickness of the circumferential pipeline of each group of the first collection points is calculated in the mode, the partition is started, and the partition principle is as follows: starting from a first collection point set farthest from the ground, wherein the first collection point set is used as a first collection point set, the numbers of the first collection point sets are respectively a second collection point set and a third collection point set along the direction pointing to the ground, if the absolute value of the difference value between the wall thicknesses of the circumferential pipelines of the first collection point set, the second collection point set and the third collection point set is smaller than or equal to a first preset threshold value, the areas corresponding to the first collection point set, the second collection point set and the third collection point set are used as an area to be cleaned, and then starting from the fourth collection point set, the areas are divided in the same mode; if the absolute value of the difference value between the wall thicknesses of the circumferential pipelines of the first collection point set and the second collection point set is larger than a first preset threshold value, taking the area corresponding to the first collection point set as an area to be cleaned, and dividing the area in the same way from the second collection point set. Since the number of the first collection points contained in each region to be cleaned is different, the length of each two regions to be cleaned is also different.
The method for dividing the area provided by the embodiment can simplify the control process of the whole cleaning to a certain extent, when the cleaning end gradually goes deep into the pipeline to strike, if a plurality of groups of continuous first collecting points are integrated in the same area to be cleaned, the power output by the first driving device can be maintained unchanged until the area to be cleaned is changed, the vibration information is changed along with the change of the area to be cleaned, the first driving device is adjusted again, the power is changed, and the scaling efficiency in cleaning can be improved by the method of regional treatment.
In an alternative embodiment, the obtaining the wall thickness of the area pipeline of the tubular heat exchanger pipeline in each to-be-cleaned area at least comprises the following steps:
Randomly acquiring a region to be cleaned, dividing the region to be cleaned into a plurality of first regions, and arranging the first regions along the circumferential direction of the region to be cleaned; each first region is internally provided with a plurality of groups of second collection point sets, and each second collection point set comprises a plurality of collection points which are uniformly distributed along the axial direction of the tube array heat exchanger pipeline;
calculating an axial pipeline wall thickness of each group of the second collection points based on the pipeline wall thickness of all the collection points in the second collection points;
Taking the average value of the axial pipeline wall thicknesses of all groups of the second collection points in the same first region as a first pipeline wall thickness of the first region; and the average value of the wall thickness of all the first pipelines in the region to be cleaned is the wall thickness of the pipelines in the region to be cleaned.
Specifically, each to-be-cleaned area is provided with a plurality of first areas, the plurality of first areas are circumferentially arranged to form the to-be-cleaned area, the extending direction of the first areas is the axial direction of the tube-in-tube heat exchanger pipeline, and for one to-be-cleaned area, the collection points in the second collection point set of the first areas belong to different groups of first collection point sets in the to-be-cleaned area.
Averaging the wall thicknesses of the pipelines at all the acquisition points in the second acquisition point set, wherein the average value is the axial pipeline wall thickness of the second acquisition point set;
According to the embodiment, the situation that the thickness of the inner scale is uneven along the circumferential direction of the pipeline is considered, and the method for dividing the pipeline into areas and averaging the areas for multiple times is finer and more targeted, so that the wall thickness of the pipeline in the obtained area is more representative and more accurate.
In an alternative embodiment, the cleaning end at least comprises a spray head 1, and the spray head 1 can spray multiple paths of cleaning water; the cleaning device stretches in from the first opening and moves in the tube array heat exchanger pipeline along the direction that the first opening points to the second opening;
after said impacting said inner scale of said region to be cleaned such that said inner scale is detached from the inner wall of the pipe of said region to be cleaned, the method further comprises the steps of:
acquiring the tightness of the area to be cleaned towards the second opening side;
when judging that the tightness is smaller than or equal to a second preset threshold value, controlling the spray head 1 to spray cleaning water with pressure smaller than a first preset pressure;
when the tightness is judged to be larger than a third preset threshold value, the spray head 1 is controlled to spray cleaning water with pressure larger than second preset pressure, and the second preset pressure is larger than the first preset pressure.
Specifically, in this embodiment, it is considered that since both ends of the pipe have openings, if both ends are not completely blocked by the inner scale, the inner scale that is dropped by impact can be impacted by the multiple paths of cleaning water sprayed from the spray head 1 after the cleaning end vibrates, and flows out from the first opening or the second opening together with the cleaning water.
Optionally, the water outlet of the spray head 1 is a three-in/three-out model, namely, a hole at the end, the direction of spraying the cleaning water faces the second opening, three holes at the tail, the direction of spraying the cleaning water faces the first opening, and the water pressure of the cleaning water sprayed in the spray head 1 is controlled by a cleaning machine; after the cleaning end vibrates, the inner scale which is loose or falls is washed away by the water pressure of cleaning water, and the scales are washed away by the water pressure of the rear three holes, so that the effect of cleaning stubborn scales is achieved.
The tightness is used for representing whether the inner area of the pipeline below the area to be cleaned is communicated with the outside or not, namely, whether the inner portion of the pipeline below the area to be cleaned is blocked by inner scaling or not, when the tightness is 100%, the inner portion of the pipeline below the area to be cleaned is completely blocked by the inner scaling, as the inner scaling which is impacted and shed can form powdery or granular substances, the powdery or granular substances are required to flow out of the second opening smoothly, the tightness is less than 100%, but cannot be close to 100%, namely, a certain space is required to be provided for the powdery or granular substances to flow down smoothly, and optionally, the tightness is 80%.
Further, the inner scale of the powder or granule shape that is impacted and fallen out is to flow out from the second opening, and the inner scale can slide down from the second opening by self gravity without excessive pressure of the cleaning water, and the cleaning water with the first preset pressure is applied to the inner scale, so that the inner scale can help the inner scale to flow out from the second opening more quickly.
However, when the tightness of the area to be cleaned towards the second opening side is smaller than or equal to the second preset threshold, if the tightness is larger than the third preset threshold, the inner scale cannot flow out of the second opening, and at this time, the inner scale cannot flow out of the first opening by increasing the pressure of the cleaning water because the inner scale of the pipe of the area to be cleaned towards the first opening side is completely knocked by the cleaning end, the tightness towards the first opening side is necessarily smaller than or equal to the second preset threshold.
In an alternative embodiment, the obtaining the tightness of the area to be cleaned towards the second opening side at least includes the following steps:
acquiring a plurality of reference areas of the to-be-cleaned area, wherein the reference areas are the to-be-cleaned area of the to-be-cleaned area far away from the first opening side;
Obtaining the inner scaling thickness of each reference area based on the wall thickness of all the circumferential pipelines; and obtaining the maximum value of all the inner scaling thicknesses;
and calculating the ratio of the maximum value to the inner diameter of the tube-in-tube heat exchanger, and taking the ratio as the tightness.
Specifically, the reference area is the area to be cleaned below the area to be cleaned, the inner scaling thickness of the reference area is the maximum value of the wall thickness of all the circumferential pipelines of the reference area, and the maximum value of the inner scaling thickness is obtained, when the maximum value is equal to the inner diameter of the pipeline of the tubular heat exchanger, the sealing degree is 100%, which means that the bottom is completely blocked by the inner scaling, and when the difference between the maximum value and the inner diameter of the pipeline of the tubular heat exchanger is large, the sealing degree is smaller.
In an alternative embodiment, the vibration information database further includes a plurality of sets of hardness, each set of hardness corresponding to a plurality of sets of the pipe wall thicknesses; the area to be cleaned close to the first opening side is a first area to be cleaned;
The method comprises the steps of obtaining the wall thickness of the regional pipeline of the tubular heat exchanger pipeline in each region to be cleaned, wherein the method at least comprises the steps of obtaining the wall thickness of the regional pipeline of the tubular heat exchanger pipeline in a first region to be cleaned;
after obtaining the wall thickness of the regional pipeline of the tubular heat exchanger pipeline in the first region to be cleaned, the method further comprises the following steps:
acquiring the hardness of the inner scale of the first area to be cleaned;
the vibration information database is called to obtain vibration information corresponding to the wall thickness of each regional pipeline, and the method at least comprises the following steps:
and when judging that the hardness is greater than or equal to the first preset hardness, calling the vibration information database to obtain vibration information corresponding to the hardness and the regional pipeline wall thickness.
Specifically, the hardness of the inner scale on the inner wall of the pipeline is the hardness degree of the scale, which is related to the component content of water flowing in the pipeline, the working temperature of the heat exchanger, the interval duration between two cleaning operations and the like, for example, the hardness of the inner scale can be increased due to the fact that the viscous substances in the water are more, the working temperature of the heat exchanger is high, and the interval between two cleaning operations is long.
The hardness characterizes the intractable degree of inner scaling, namely the degree of difficulty of being knocked off, so that the vibration information is related to the wall thickness of the pipeline in the area to be cleaned and the hardness, and when the hardness of the inner scaling reaches a certain degree, the impact treatment is needed, and if the inner scaling is softer, the inner scaling is cleaned by the brush head and the cleaning water. Because the hardness of the inner scale of the whole pipeline is approximately similar when the water passes through the whole pipeline, the hardness can be obtained and judged once when the cleaning end enters the first area to be cleaned, and the obtained and judged result can be directly used for improving the treatment efficiency.
In this embodiment, the hardness of the inner scale is considered to be related to the vibration information of the cleaning end, if the inner scale is softer, the cleaning is easier even if the inner scale is thicker, if the inner scale is harder, the cleaning is not easy even if the inner scale is thinner, the corresponding vibration information is different, and the hardness is introduced into the vibration information database, so that the control precision is further improved, and the cleaning effect is optimized.
In an alternative embodiment, said obtaining said hardness of said inner scale of said first area to be cleaned comprises at least the steps of:
Controlling the cleaning end to vibrate along the axial direction of the tube of the tubular heat exchanger by a preset vibration force, pre-striking the inner scale of the first area to be cleaned to obtain vibration times, and obtaining the hardness of the inner scale based on the vibration times; and the vibration times are accumulated vibration times of the cleaning end when the vibration stroke of the cleaning end is changed.
Specifically, the preset vibration force is smaller, the cleaning end is controlled to perform preset vibration with the preset vibration force, internal scaling is pre-impacted, when the end part of the cleaning end is prevented by the internal scaling each time the cleaning end vibrates, the cleaning end can impact the internal scaling, and at the moment, the impact position of the end part of the cleaning end along the axial direction is obtained; when the striking position is moved backward, it is determined that the vibration stroke is changed.
And obtaining the hardness of the internal scale through a hardness model based on the vibration times, wherein the input of the hardness model is the vibration times, and the output is the hardness of the internal scale. Wherein, the larger the vibration times, the higher the hardness of the inner scale is, the more intractable the inner scale is, and the less easy the inner scale is impacted and falls off.
In a specific scenario, if the scale in the portion contacted with the cleaning end is knocked off after n times of vibration, the cleaning end must go deep to a certain extent in the n+1st time of vibration, that is, in the n+1st time of vibration, the cleaning end contacts with the scale in the deeper portion, which indicates that the vibration stroke of the cleaning end changes, in this application scenario, the vibration stroke is unchanged in the first n times of vibration, and the vibration frequency is n+1.
The application uses the intensity characteristic of the cleaning end to vibrate and poke the inner scale firstly, so that the inner scale is separated from the inner wall of the pipe, thus realizing the effect that the inner scale separated from the inner wall can be flushed out of the pipeline by using a cleaner with lower pressure, greatly saving the equipment cost, solving the problem that the intractable scale of the small-diameter tube-array heat exchanger is difficult to clean (the hardness degree of the scale is judged by pre-striking firstly), adopting a hard tube connection mode, compared with the mode that flexible steel guns (namely pressure-resistant hoses) are connected in the prior art, the application adopts poking and bumping modes to effectively clean the intractable scale, can reduce the use of water quantity, reduce the total discharge amount of dangerous waste discharge generated by cleaning the scale, reduce the cost of dangerous waste treatment, and play the roles of good energy conservation, emission reduction, safety and environmental protection; the method can effectively ensure the service life of equipment such as a heat exchanger, and the like, and the cleaning means which automatically control and accurately match vibration information can not damage the inner wall of the pipeline, so that the cleaning time is shortened, the cleaning period is prolonged, and the production time is ensured.
Example 2
Referring to fig. 2, the present embodiment provides a control system for cleaning scale in a pipeline, where the control system is configured to control a cleaning device to clean scale in a pipeline of a tubular heat exchanger, and the cleaning device at least includes a cleaning end capable of extending into the pipeline of the tubular heat exchanger; the control system includes:
The partition module is configured to divide the tubular heat exchanger pipeline into a plurality of areas to be cleaned along the axial direction of the tubular heat exchanger pipeline, and obtain the wall thickness of the tubular heat exchanger pipeline in each area to be cleaned;
the calculation module is configured to retrieve a vibration information database to obtain vibration information corresponding to the wall thickness of each regional pipeline;
The control module is configured to control the cleaning end to vibrate in the corresponding region to be cleaned along the axial direction of the tube of the tubular heat exchanger according to the vibration information corresponding to the wall thickness of the tube in each region, and impact the inner scale of the region to be cleaned to separate the inner scale from the inner wall of the tube in the region to be cleaned; the vibration information database at least comprises a plurality of groups of pipeline wall thicknesses and vibration information corresponding to each group of pipeline wall thicknesses, wherein the vibration information at least comprises vibration frequency and vibration force of the cleaning device along the axial direction of the pipeline of the tubular heat exchanger.
Example 3
As shown in fig. 3, the computer system 700 of the terminal device includes a CPU701 that can perform various appropriate actions and processes according to a program stored in a ROM702 or a program loaded from a storage section 708 into a RAM 703. In the RAM703, various programs and data required for the system operation are also stored. The CPU701, ROM702, and RAM703 are connected to each other through a bus 704. I/O interface 705 is also connected to bus 704. The following components are connected to the I/O interface 705: an input section 706 including a keyboard, a mouse, and the like; an output portion 707 including a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, a speaker, and the like; a storage section 708 including a hard disk or the like; and a communication section 709 including a network interface card such as a LAN card, a modem, or the like. The communication section 709 performs communication processing via a network such as the internet. The drives are also connected to the I/O interface 705 as needed. A removable medium 711 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 710 as necessary, so that a computer program read therefrom is mounted into the storage section 708 as necessary.
In particular, the process described above with reference to flowchart 1 may be implemented as a computer software program according to an embodiment of the application. For example, embodiment 3 of the present application includes a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method shown in the flowchart. In such embodiments, the computer program may be downloaded and installed from a network via a communication portion, and/or installed from a removable medium. When executed by the CPU701, the computer program performs the functions defined above in the present computer system 700.
The computer readable medium shown in the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present application, however, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments 3 of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
As another aspect, the present application also provides a computer-readable medium that may be contained in the electronic device described in the above embodiment; or may exist alone without being incorporated into the electronic device. The computer readable medium carries one or more programs which, when executed by one of the electronic devices, cause the electronic device to implement the control method for in-pipe scale cleaning as described in the above embodiments.
For example, the electronic device may implement the method as shown in fig. 1: s101, dividing the tubular heat exchanger pipeline into a plurality of areas to be cleaned along the axial direction of the tubular heat exchanger pipeline, and obtaining the wall thickness of the tubular heat exchanger pipeline in each area to be cleaned; s102, a vibration information database is called to obtain vibration information corresponding to the wall thickness of the pipeline in each area, and the cleaning end is controlled to vibrate in the corresponding area to be cleaned along the axial direction of the pipeline of the tubular heat exchanger according to the vibration information corresponding to the wall thickness of the pipeline in each area, so that the inner scale is impacted in the area to be cleaned, and the inner scale is separated from the inner wall of the pipeline in the area to be cleaned; the vibration information database at least comprises a plurality of groups of pipeline wall thicknesses and vibration information corresponding to each group of pipeline wall thicknesses, wherein the vibration information at least comprises vibration frequency and vibration force of the cleaning device along the axial direction of the pipeline of the tubular heat exchanger.
It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functions of two or more modules or units described above may be embodied in one module or unit in accordance with the disclosed embodiments of the application. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
Furthermore, although the steps of the methods of the present application are depicted in the accompanying drawings in a particular order, this is not required to or suggested that the steps must be performed in this particular order or that all of the steps shown be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform, etc.
From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware.
The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present application and its core ideas. The foregoing is merely illustrative of the preferred embodiments of this application, and it is noted that there is objectively no limit to the specific structure disclosed herein, since numerous modifications, adaptations and variations can be made by those skilled in the art without departing from the principles of the application, and the above-described features can be combined in any suitable manner; such modifications, variations and combinations, or the direct application of the inventive concepts and aspects to other applications without modification, are contemplated as falling within the scope of the present application.
Claims (6)
1. The control method is used for controlling a cleaning device to clean the inner scale of the pipeline of the tubular heat exchanger, and the cleaning device at least comprises a cleaning end which can extend into the pipeline of the tubular heat exchanger; the control method is characterized by comprising the following steps:
Dividing the tubular heat exchanger pipeline into a plurality of areas to be cleaned along the axial direction of the tubular heat exchanger pipeline, and obtaining the wall thickness of the tubular heat exchanger pipeline in each area to be cleaned;
the vibration information database is called to obtain vibration information corresponding to the wall thickness of the pipeline in each area, and the cleaning end is controlled to vibrate in the corresponding area to be cleaned along the axial direction of the pipeline of the tubular heat exchanger according to the vibration information corresponding to the wall thickness of the pipeline in each area, so that the inner scale is impacted to the area to be cleaned, and the inner scale is separated from the inner wall of the pipeline in the area to be cleaned; the vibration information database at least comprises a plurality of groups of pipeline wall thicknesses and vibration information corresponding to each group of pipeline wall thicknesses, wherein the vibration information at least comprises vibration frequency and vibration force of the cleaning device along the axial direction of the pipeline of the tubular heat exchanger;
The method for dividing the area of the tubular heat exchanger pipeline to obtain a plurality of areas to be cleaned at least comprises the following steps:
A plurality of groups of first collection point sets are uniformly distributed on the tubular heat exchanger pipeline along the axial direction of the tubular heat exchanger pipeline, and each first collection point set comprises a plurality of collection points distributed in an array along the circumferential direction of the tubular heat exchanger pipeline;
Measuring the wall thickness of the pipeline at each acquisition point by utilizing an ultrasonic detection method, and calculating the circumferential pipeline wall thickness of each group of the first acquisition point set based on the wall thickness of the pipeline at all the acquisition points in the group of the first acquisition point set;
Taking the areas corresponding to the adjacent groups of first acquisition point sets as one area to be cleaned, wherein the absolute value of the difference value between the wall thicknesses of the circumferential pipelines of every two groups of first acquisition point sets in the same area to be cleaned is smaller than or equal to a first preset threshold value;
the method for obtaining the regional pipeline wall thickness of the tubular heat exchanger pipeline in each region to be cleaned at least comprises the following steps:
Randomly acquiring a region to be cleaned, dividing the region to be cleaned into a plurality of first regions, and arranging the first regions along the circumferential direction of the region to be cleaned; each first region is internally provided with a plurality of groups of second collection point sets, and each second collection point set comprises a plurality of collection points which are uniformly distributed along the axial direction of the tube array heat exchanger pipeline;
calculating an axial pipeline wall thickness of each group of the second collection points based on the pipeline wall thickness of all the collection points in the second collection points;
taking the average value of the axial pipeline wall thicknesses of all groups of the second collection points in the same first region as a first pipeline wall thickness of the first region; the average value of the wall thickness of all the first pipelines in the region to be cleaned is the wall thickness of the pipelines in the region to be cleaned;
the cleaning end at least comprises a spray head, and the spray head can spray multiple paths of cleaning water; the cleaning device stretches in from the first opening and moves in the tube array heat exchanger pipeline along the direction that the first opening points to the second opening;
after said impacting said inner scale of said region to be cleaned such that said inner scale is detached from the inner wall of the pipe of said region to be cleaned, the method further comprises the steps of:
acquiring the tightness of the area to be cleaned towards the second opening side;
When the tightness is judged to be smaller than or equal to a second preset threshold value, the spray head is controlled to spray cleaning water with pressure smaller than a first preset pressure;
when the tightness is judged to be larger than a third preset threshold value, the spray head is controlled to spray cleaning water with pressure larger than second preset pressure, and the second preset pressure is larger than the first preset pressure;
The step of obtaining the tightness of the to-be-cleaned area towards the second opening side at least comprises the following steps:
acquiring a plurality of reference areas of the to-be-cleaned area, wherein the reference areas are the to-be-cleaned area of the to-be-cleaned area far away from the first opening side;
Obtaining the inner scaling thickness of each reference area based on the wall thickness of all the circumferential pipelines; and obtaining the maximum value of all the inner scaling thicknesses;
and calculating the ratio of the maximum value to the inner diameter of the tube-in-tube heat exchanger, and taking the ratio as the tightness.
2. The control method for in-pipe scale cleaning according to claim 1, wherein the vibration information database further comprises a plurality of sets of hardness, each set of hardness corresponding to a plurality of sets of pipe wall thicknesses; the area to be cleaned close to the first opening side is a first area to be cleaned;
The method comprises the steps of obtaining the wall thickness of the regional pipeline of the tubular heat exchanger pipeline in each region to be cleaned, wherein the method at least comprises the steps of obtaining the wall thickness of the regional pipeline of the tubular heat exchanger pipeline in a first region to be cleaned;
after obtaining the wall thickness of the regional pipeline of the tubular heat exchanger pipeline in the first region to be cleaned, the method further comprises the following steps:
acquiring the hardness of the inner scale of the first area to be cleaned;
the vibration information database is called to obtain vibration information corresponding to the wall thickness of each regional pipeline, and the method at least comprises the following steps:
and when judging that the hardness is greater than or equal to the first preset hardness, calling the vibration information database to obtain vibration information corresponding to the hardness and the regional pipeline wall thickness.
3. A control method for in-line scale cleaning according to claim 2, wherein said obtaining said hardness of the in-line scale of said first area to be cleaned comprises at least the steps of:
Controlling the cleaning end to vibrate along the axial direction of the tube of the tubular heat exchanger by a preset vibration force, pre-striking the inner scale of the first area to be cleaned to obtain vibration times, and obtaining the hardness of the inner scale based on the vibration times; and the vibration times are accumulated vibration times of the cleaning end when the vibration stroke of the cleaning end is changed.
4. The control system is used for controlling a cleaning device to clean the inner scale of the pipeline of the tubular heat exchanger, and the cleaning device at least comprises a cleaning end which can extend into the pipeline of the tubular heat exchanger; the control system includes:
The partition module is configured to divide the tubular heat exchanger pipeline into a plurality of areas to be cleaned along the axial direction of the tubular heat exchanger pipeline, and obtain the wall thickness of the tubular heat exchanger pipeline in each area to be cleaned;
the calculation module is configured to retrieve a vibration information database to obtain vibration information corresponding to the wall thickness of each regional pipeline;
The control module is configured to control the cleaning end to vibrate in the corresponding region to be cleaned along the axial direction of the tube of the tubular heat exchanger according to the vibration information corresponding to the wall thickness of the tube in each region, and impact the inner scale of the region to be cleaned to separate the inner scale from the inner wall of the tube in the region to be cleaned; the vibration information database at least comprises a plurality of groups of pipeline wall thicknesses and vibration information corresponding to each group of pipeline wall thicknesses, wherein the vibration information at least comprises vibration frequency and vibration force of the cleaning device along the axial direction of the pipeline of the tubular heat exchanger.
5. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, implements the steps of the control method for in-line scale cleaning according to any one of claims 1 to 3.
6. A computer readable storage medium having a computer program, characterized in that the computer program when executed by a processor implements the steps of the control method for in-pipe scale cleaning according to any one of claims 1 to 3.
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