CN111992548A - Device and method for automatically cleaning water circulation pipeline polymer - Google Patents
Device and method for automatically cleaning water circulation pipeline polymer Download PDFInfo
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- CN111992548A CN111992548A CN202010848711.XA CN202010848711A CN111992548A CN 111992548 A CN111992548 A CN 111992548A CN 202010848711 A CN202010848711 A CN 202010848711A CN 111992548 A CN111992548 A CN 111992548A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2209/00—Details of machines or methods for cleaning hollow articles
- B08B2209/02—Details of apparatuses or methods for cleaning pipes or tubes
- B08B2209/027—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces
- B08B2209/032—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces by the mechanical action of a moving fluid
Abstract
The invention relates to the technical field of circulating cleaning equipment, in particular to a device and a method for automatically cleaning a water circulating pipeline polymer.
Description
Technical Field
The invention relates to the technical field of circulating cleaning equipment, in particular to a device and a method for automatically cleaning a water circulating pipeline polymer.
Background
In recent years, polyacrylamide flexible chain structure polymers are widely applied to industries such as papermaking, mineral separation, oil extraction, metallurgy, building materials, sewage treatment and the like, and are called as "all-industry additives". In the aspect of pipeline transportation, the polymer is widely used as an additive to achieve the drag reduction and energy saving effects of various types of fluid transportation, but at present, the interaction mechanism between the drag reducer and the turbulent flow of the fluid is not well understood, so a great number of scientific research sites at home and abroad are dedicated to the drag reduction research of the polymer by taking water as a main medium. With the increasing of the research, the application of the polymer is gradually expanded, and some problems have to be put forward, for example, due to the nature of the polymer, the polymer is very easy to adhere to the wall of the container tube, so that data errors are caused, and even pipelines are blocked in serious cases, so that great trouble is brought to scientific research and even actual application. Therefore, how to rapidly and effectively remove the polymer adhered and deposited on the pipe wall of the pipeline by breaking through the existing work is very valuable to research.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problems that the polymer is very easy to adhere to the wall of a container pipe due to the nature of the polymer, data errors are caused, and even a pipeline is blocked in serious cases, so that great troubles are brought to scientific research and practical application.
The technical scheme adopted by the invention for solving the technical problems is as follows: a device for automatically cleaning water circulation pipeline polymer comprises a liquid storage tank, a circulation pump, a differential pressure sensor, a processing unit and a circulation pipeline, the liquid storage tank is provided with a liquid inlet and a liquid outlet which are communicated with the liquid storage tank, the two ends of the circulating pipeline are respectively arranged at the liquid inlet and the liquid outlet of the liquid storage tank and are communicated with each other, the differential pressure sensor and the circulating pump are arranged on the circulating pipeline, an automatic liquid injection mechanism with salt ions inside is arranged on the circulating pipeline, the automatic liquid injection mechanism, the circulating pump and the pressure sensor are in signal communication with the processing unit, when the differential pressure sensor reaches an induction critical value, the processing unit controls the automatic liquid injection mechanism to inject salt ions into the circulating pipeline and circularly clean the circulating pipeline through the circulating pump until the differential pressure sensor recovers to a set value, and the automatic liquid injection mechanism and the circulating pump are stopped.
According to the invention, the circulating pipeline is arranged on the liquid storage tank, and the circulating pump controls the flow in the circulating pipeline, so that the pressure difference sensor triggers and controls the automatic liquid injection mechanism to inject salt ions into the circulating pipeline until the flow resistance in the circulating pipeline is not changed, and at the moment, the processing unit stops the circulating pump and the automatic liquid injection mechanism to complete the automatic cleaning operation.
In order to realize the automatic liquid injection of the automatic liquid injection mechanism, the automatic liquid injection mechanism further comprises a liquid injection bin and an air cylinder with a high-pressure medium inside, salt ions are arranged in the liquid injection bin, the liquid injection bin is communicated with a circulating pipeline, the air cylinder is communicated with the liquid injection bin, a first valve is arranged before the liquid injection bin and the circulating pipeline, a second valve is arranged between the air cylinder and the liquid injection bin, and the first valve and the second valve are in signal connection with a processing unit.
In order to prevent impurities from entering the circulating pipeline and accumulating, a first filtering device is further arranged between the liquid injection cabin and the circulating pipeline. Through set up first filter equipment on annotating liquid storehouse and circulating line, first filter equipment plays the filtration to annotating the medium in the liquid storehouse to prevent that impurity from getting into circulating line and piling up.
In order to facilitate the installation and maintenance of the first filtering device, furthermore, two ends of the first filtering device are installed between the circulating pipeline and the liquid injection bin through a tenon structure. The two ends of the first filtering device are arranged between the circulating pipeline and the liquid injection bin through the clamping tenon structures, so that the first filtering device can be quickly installed and detached, and the maintenance efficiency of the first filtering device is improved.
In order to know the pressure condition of the liquid injection bin in real time, a first pressure sensor is further arranged in the liquid injection bin and is in signal connection with the processing unit. Can in time know the interior pressure condition of annotating the liquid storehouse through first pressure sensor, make things convenient for the staff to operate.
In order to facilitate the working personnel to know the pressure condition in the gas cylinder, further, a first pressure gauge is installed on the gas cylinder. Through installing first manometer on the gas cylinder, the staff can in time know the gas cylinder internal pressure condition through first manometer.
In order to prevent the impurities in the liquid storage tank from entering the circulating pump to damage the circulating pump, a second filtering device is arranged between the liquid storage tank and the circulating pump. Through set up second filter equipment between liquid storage pot and circulating pump, second filter equipment filters the medium in the liquid storage pot, prevents that impurity from entering into in the circulating pump.
In order to facilitate the understanding of the current medium flow rate of the circulation pipeline, a flow meter is further installed on the circulation pipeline. Through set up the flowmeter on the circulating line, make things convenient for the staff to know the current flow of medium of circulating line.
In order to realize the pressure conditions of the upstream and the downstream of the two circulation pipelines, an upstream pressure gauge is arranged at one end, close to the automatic liquid injection mechanism, of the circulation pipeline, the automatic liquid injection mechanism is located between the upstream pressure gauge and the circulating pump, a downstream pressure gauge is arranged at one end, close to the liquid inlet, of the circulation pipeline, and the downstream pressure gauge is located between the upstream pressure gauge and the liquid storage tank. Through installing upper reaches manometer and low reaches manometer on circulating line, the pressure condition of automatic notes liquid mechanism department is in time monitored to the upper reaches manometer, and the pressure condition that low reaches manometer in time monitoring circulating line is close to the liquid storage pot makes things convenient for the staff to operate.
A method for cleaning the device for automatically cleaning the water circulation pipeline polymer comprises the following steps:
s1, injecting salt ions into the liquid injection bin, wherein the salt ions are calcium chloride, the magnesium chloride is used as a raw material, and the ratio of the calcium ions to the magnesium ions is 3.5: 1 is 0.5 mol/L;
s2, during pipe cleaning operation, the fluid in the circulating pipeline is regarded as clear water without drag reducer, the flow of the circulating pipeline is increased through the circulating pump, the resistance in the circulating pipeline is increased, the numerical value of the pressure difference in the circulating pipeline is obviously increased, when the pressure difference sensor receives the signal, the first valve and the second valve are automatically opened, and the automatic liquid injection mechanism conveys salt ions into the circulating pipeline;
s3, when the pipe cleaning operation is completed, the flow rate of the fluid in the circulating pipeline is reduced through the circulating pump, the pressure difference value in the circulating pipeline is obviously reduced, and the first valve and the second valve are closed when the pressure difference sensor receives the signal.
The invention has the beneficial effects that:
1. the high-valence salt ions of calcium and magnesium are used as the tube cleaning agent, so that the defects that experimental pipelines need to be manually disassembled, a large amount of time and cost are consumed for manual brushing, and cleaning is not thorough in the traditional means are overcome. The apparent viscosity of the polymer is reduced and even precipitates are generated through the interaction between calcium and magnesium ions and the polymer, so that the polymer is separated from the adhered pipe wall, a large amount of preliminary preparation working time is saved, the polymer has the advantages of convenience in operation, no need of greatly changing the existing pipeline, thorough cleaning and the like, the calcium and magnesium ions have wide sources, can be extracted from industrial wastewater and even seawater, and accords with the current environmental protection and safety concept.
2. The automatic liquid injection mechanism provided by the invention realizes automatic operation by utilizing the change of the pressure difference, does not need to greatly modify the existing pipeline, can be easily realized by only introducing a key pressure difference sensor, has a simple principle, is convenient to operate, does not influence other experiments except the pipe cleaning operation, and is a scientific and effective automation device.
3. The automatic pigging device which combines the calcium-magnesium ion pigging with the differential pressure sensor realizes the breakthrough of the limitations of the pigging technology in the existing scientific research places, realizes the automatic pigging operation on the premise of not interfering other scientific research works, and has the advantages of high efficiency, time saving and labor saving.
In summary, the apparatus for automatically cleaning water circulation line polymer and the method thereof according to the present invention are applied, by arranging the circulating pipeline on the liquid storage tank and controlling the flow in the circulating pipeline by the circulating pump, thereby leading the differential pressure sensor to trigger and control the automatic liquid injection mechanism to inject salt ions into the circulating pipeline until the flow resistance in the circulating pipeline is not changed, stopping the circulating pump and the automatic liquid injection mechanism by the processing unit at the moment to finish the automatic cleaning operation, avoiding the problems that the polymer is extremely easy to adhere to the pipe wall of the container due to the property of the polymer, causing data error, even blocking the pipeline when the polymer is serious, therefore, scientific research and actual application are greatly affected, however, effective research for solving the problem is rarely carried out in current reports, and at present, occasions such as scientific research experiments and the like are often not thorough in brushing by means of manual brushing, so that time and labor are wasted, and brushing is not thorough.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a flow chart of the present invention.
Fig. 2 is a schematic structural view of the automatic liquid injection mechanism of the present invention.
Fig. 3 is a sectional view of the automatic liquid injection mechanism of the present invention.
FIG. 4 is a schematic view of the tenon structure of the present invention.
FIG. 5 is a schematic view of the joint of the automatic liquid injection pipe according to the present invention.
In the figure: 1. the automatic liquid injection mechanism comprises, by weight, 1-1 part of a liquid injection bin, 1-2 parts of a gas cylinder, 1-3 parts of a pressure sensor, 1-4 parts of a first valve, 1-5 parts of a second valve, 1-6 parts of a clamping tenon structure, 1-7 parts of a first filtering device, 1-8 parts of a liquid injection pipeline, 1-9 parts of a first sealing ring, 1-10 parts of a bin cover, 1-11 parts of a second sealing ring, 1-12 parts of a sewage discharge port, 1-13 parts of a first pressure gauge, 2 parts of a liquid storage tank, 3 parts of a second filtering device, 4 parts of a circulating pump, 5 parts of a differential pressure sensor, 6 parts of a differential pressure gauge, 7 parts of an upstream pressure gauge, 8 parts of a downstream pressure gauge, 9 parts of a.
Detailed Description
The invention is described in more detail below with reference to the following examples:
the present invention is not limited to the following embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1-5, a device for automatically cleaning a water circulation pipeline polymer comprises a liquid storage tank 2, a circulation pump 4, a differential pressure sensor 5, a processing unit and a circulation pipeline, wherein the liquid storage tank 2 is provided with a liquid inlet and a liquid outlet communicated with the liquid storage tank 2, two ends of the circulation pipeline are respectively arranged at the liquid inlet and the liquid outlet of the liquid storage tank 2 and communicated with each other, the differential pressure sensor 5 and the circulation pump 4 are both arranged on the circulation pipeline, the circulation pipeline is provided with an automatic liquid injection mechanism 1 with salt ions inside, the automatic liquid injection mechanism 1, the circulation pump 4 and the pressure sensors 1-3 are all in signal communication with the processing unit, when the differential pressure sensor 5 reaches a sensing critical value, the processing unit controls the automatic liquid injection mechanism 1 to inject the salt ions into the circulation pipeline and circularly clean the circulation pipeline through the, and stopping the automatic liquid injection mechanism 1 and the circulating pump 4 until the differential pressure sensor 5 recovers to a set value. The liquid level height of the liquid storage tank 2 is ensured to be more than three-fourths of the total capacity during operation so as to be beneficial to simultaneously cleaning and removing polymers on the tank wall of the liquid storage tank 2 and eliminate adverse effects on a circulation pipeline experiment due to the existence of the polymers on the tank wall, the gas cylinder 1-2 aims to ensure that the pigging liquid in the liquid injection bin 1-1 can smoothly flow out, and the gas stored in the pigging liquid is inert gas nitrogen and cannot cause negative effects on the pigging liquid.
The automatic liquid injection mechanism 1 comprises a liquid injection bin 1-1 and a gas cylinder 1-2 with a high-pressure medium inside, salt ions are arranged in the liquid injection bin 1-1, the liquid injection bin 1-1 is communicated with a circulating pipeline, the gas cylinder 1-2 is communicated with the liquid injection bin 1-1, a first valve 1-4 is arranged in front of the liquid injection bin 1-1 and the circulating pipeline, a second valve 1-5 is arranged between the gas cylinder 1-2 and the liquid injection bin 1-1, the first valve 1-4 and the second valve 1-5 are both in signal connection with a processing unit, and inert gas compressed nitrogen is stored in the gas cylinder 1-2. The two sections of the liquid injection pipelines 1-8 in the liquid injection bin 1-1 are strictly sealed to prevent the generation of serious events that gas such as carbon dioxide in the air reacts with calcium and magnesium ions in the liquid injection bin 1-1 to generate water-insoluble impurity precipitates to pollute the liquid in the liquid injection bin and even block the liquid injection pipelines 1-8, and the like, and simultaneously, the materials selected for the liquid injection bin 1-1 and the liquid injection pipelines 1-8 are made of glass fiber reinforced plastic materials, so that the corrosion of a large amount of chloride ions in the liquid injection bin can be effectively prevented.
A first filtering device 1-7 is arranged between the liquid injection bin 1-1 and the circulating pipeline. The upper end of the liquid injection bin 1-1 is provided with a bin cover 1-10, and a second sealing ring 1-11 is arranged between the bin cover 1-10 and the liquid injection bin 1-1.
Two ends of the first filtering device 1-7 are arranged between the circulating pipeline and the liquid injection bin 1-1 through tenon structures 1-6.
A first pressure sensor 1-3 is arranged in the liquid injection bin 1-1, and the first pressure sensor 1-3 is in signal connection with a processing unit. The pressure sensor 1-3 in the liquid injection bin 1-1 can sense the pressure change in the liquid injection bin 1-1, so that the control valve of the compressed gas cylinder 1-2 is automatically controlled to be opened and closed.
And a first pressure gauge 1-13 is arranged on the gas cylinder 1-2.
And a second filtering device 3 is arranged between the liquid storage tank 2 and the circulating pump 4. The second filtering device 3 is arranged at the suction pipe opening of the circulating pump 4 to prevent insoluble sediment from blocking the pump pipe and damaging the facility.
A flowmeter 9 is arranged on the circulating pipeline.
The one end that the circulation pipeline is close to automatic liquid mechanism 1 of annotating is provided with upper reaches manometer 7, automatic liquid mechanism 1 of annotating is located between upper reaches manometer 7 and circulating pump 4, the one end that the circulation pipeline is close to the inlet is provided with low reaches manometer 8, low reaches manometer 8 is located between upper reaches manometer 7 and the liquid storage pot 2.
The method for cleaning the device for automatically cleaning the water circulation pipeline polymer comprises the following steps:
s1, injecting salt ions into the liquid injection bin 1-1, wherein the salt ions are calcium chloride, the magnesium chloride is used as a raw material, and the ratio of the calcium ions to the magnesium ions is 3.5: 1 is 0.5 mol/L;
s2, during pipe cleaning operation, the fluid in the circulating pipeline is regarded as clear water without drag reducer, the flow of the circulating pipeline is increased by the circulating pump 4, the resistance in the circulating pipeline is increased, the numerical value of the pressure difference in the circulating pipeline is obviously increased, when the pressure difference sensor 5 receives the signal, the first valve 1-4 and the second valve 1-5 are automatically opened, and the automatic liquid injection mechanism 1 conveys salt ions into the circulating pipeline;
s3, when the pipe cleaning operation is completed, the flow rate of the fluid in the circulating pipeline is reduced by the circulating pump 4, the pressure difference value of the pressure difference meter 6 in the circulating pipeline is obviously reduced, and when the pressure difference sensor 5 receives the signal, the first valves 1-4 and the second valves 1-5 are closed. After each pipe cleaning operation, insoluble carboxyl salt and other sediments are discharged out of the circulating pipeline system through a drain outlet 1-12 at the bottom of the liquid storage tank 2 in time.
When the device for automatically cleaning the water circulation pipeline polymer is used, when the pipeline cleaning operation is carried out in the circulation pipeline, because a drag reducer is not additionally added, the value of the pressure difference table 6 during the pipeline cleaning operation under the same flow rate is certainly larger than the value of the pressure difference table 6 during the drag reduction operation. Therefore, the critical value sensed by the differential pressure sensor 5 can be set as the pressure difference value of clear water delivery under the daily maximum flow, and the value is certainly larger than the resistance reduction experiment value under all the same conditions. When the pipe cleaning operation is carried out, the flow in the circulating pipeline is further increased through the circulating pump 4, the numerical value of the differential pressure gauge 6 is further increased, the first valve 1-4 can be automatically opened when the differential pressure sensor 5 receives the signal, the pipe cleaning operation is completed after the numerical value of the differential pressure gauge 6 tends to be stable, the flow in the pipeline is reduced, the numerical value of the differential pressure gauge 6 is obviously reduced, the first valve 1-4 can be automatically closed when the differential pressure sensor 5 receives the signal, and meanwhile, the working state in the circulating pipeline can be recognized by a system through simple flow adjustment differential pressure, so that the automatic operation can be simply and quickly realized;
specifically, the values in the pressure difference table 6 are average values counted by the processing unit in each minute, and are in a non-instantaneous state.
Specifically, after the first valve 1-4 is opened, as the flow rate of liquid in the circulating pipeline is high and the pressure intensity is low, the pigging liquid can flow out from the liquid injection bin 1-1, when the pressure sensor 1-3 senses the pressure change generated in the liquid injection bin 1-1, the processing unit controls the second valve 1-5 at the gas cylinder 1-2 to be opened and closed, compressed nitrogen enters the liquid injection bin 1-1, so that the pressure in the liquid injection bin 1-1 is kept constant, and the liquid normally flows out.
Specifically, the automatic liquid injection mechanism 1 is internally provided with a liquid injection bin 1-1 bin cover 1-10, a liquid injection bin 1-1 drain outlet 1-12, a tenon structure 1-6 joint and the like which are all provided with a first sealing ring 1-9 to isolate air, so that the liquid in the liquid pipe is prevented from being adversely affected.
Specifically, the automatic liquid injection mechanism 1 can be supported at a high position by a support frame and can also be made into a suspension structure, so that the pressure of the automatic liquid injection mechanism on a circulating pipeline is reduced as much as possible, and in addition, regular maintenance and overhaul, pipe cleaning liquid supplementation, impurity cleaning, filter screen inspection, normal work and the like are also required.
Specifically, the liquid level in the liquid storage tank 2 is ensured to be not lower than three-fourths of the total volume when the liquid storage tank is subjected to pipe cleaning operation each time, and regular cleaning operation is required after the pipe cleaning operation is finished each time, so that insoluble carboxyl salt and other impurities deposited at the bottom of the tank are removed. Meanwhile, when the impurities at the bottom of the liquid storage tank 2 are cleaned every time, attention should be paid to whether the filtering device is normal or not so as to avoid some adverse effects.
Specifically, the pressure sensor 1-3, the second valve 1-5, the first valve 1-4 and the differential pressure sensor 5 should be periodically checked to ensure the operation sensitivity.
Firstly, performing early work: the pigging liquid is prepared, is quickly injected into the liquid injection cabin 1-1 and then is sealed in time, and then the induction values of the first pressure sensor 1-3 and the differential pressure sensor 5 are set through the processing unit. When the pipe cleaning operation is carried out, a switch of the circulating pump 4 is turned on, the flowing pressure difference change in the circulating pipeline is observed through the pressure difference meter 6, the flow rate is adjusted in the next step, the numerical value is observed through the flowmeter 9, and when the flow rate required by the pipe cleaning operation is reached, the flow rate adjustment is stopped. After sensing a critical value, the differential pressure sensor 5 automatically opens the first valve 1-4, injects the liquid cleaning liquid into the circulating pipeline through the liquid injection pipeline 1-8, and opens the second valve 1-5 at the gas cylinder 1-2 when the first pressure sensor 1-3 in the liquid injection cabin 1-1 senses the pressure change in the cabin, so as to maintain the continuous injection of the liquid cleaning liquid. The polymer on the pipe wall can be washed by the pipe cleaning liquid after entering the circulating pipeline, and the polymer reacts with the polymer to be cleaned from the pipe wall, and the generated precipitates such as carboxyl salt and the like can be gathered at the bottom of the liquid storage tank 2 along with the flowing. When the flow resistance in the circulating pipeline does not change any more, namely the numerical value of the pressure difference meter 6 is basically constant, the default pipe cleaning operation is completed, the flow in the circulating pipeline is reduced through the circulating pump 4, the first valves 1-4 are automatically closed, the pipe cleaning operation is completed, the circulating pump 4 is closed, and the automatic cleaning operation is realized.
In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. An apparatus for automatically cleaning a water circulating line polymer, comprising: comprises a liquid storage tank (2), a circulating pump (4), a differential pressure sensor (5), a processing unit and a circulating pipeline, wherein a liquid inlet and a liquid outlet which are communicated with the liquid storage tank (2) are arranged on the liquid storage tank (2), the two ends of the circulating pipeline are respectively arranged on the liquid inlet and the liquid outlet of the liquid storage tank (2) and communicated, the differential pressure sensor (5) and the circulating pump (4) are both arranged on the circulating pipeline, an automatic liquid injection mechanism (1) with salt ions inside is arranged on the circulating pipeline, the automatic liquid injection mechanism (1), the circulating pump (4) and the pressure sensor (1-3) are all communicated with the processing unit through signals, when the differential pressure sensor (5) reaches an induction critical value, the processing unit controls the automatic liquid injection mechanism (1) to inject the salt ions into the circulating pipeline and circularly clean the circulating pipeline through the circulating pump (, and stopping the automatic liquid injection mechanism (1) and the circulating pump (4) from operating until the differential pressure sensor (5) recovers to a set value.
2. The apparatus for automatically washing a water circulation line polymer according to claim 1, wherein: the automatic liquid injection mechanism (1) comprises a liquid injection bin (1-1) and a gas cylinder (1-2) with a high-pressure medium inside, salt ions are arranged in the liquid injection bin (1-1), the liquid injection bin (1-1) is communicated with a circulating pipeline, the gas cylinder (1-2) is communicated with the liquid injection bin (1-1), a first valve (1-4) is arranged in front of the liquid injection bin (1-1) and the circulating pipeline, a second valve (1-5) is arranged between the gas cylinder (1-2) and the liquid injection bin (1-1), and the first valve (1-4) and the second valve (1-5) are in signal connection with a processing unit.
3. The apparatus for automatically washing a water circulation line polymer according to claim 2, wherein: a first filtering device (1-7) is arranged between the liquid injection bin (1-1) and the circulating pipeline.
4. The apparatus for automatically washing a water circulation line polymer according to claim 3, wherein: two ends of the first filtering device (1-7) are arranged between the circulating pipeline and the liquid injection bin (1-1) through tenon structures (1-6).
5. The apparatus for automatically washing a water circulation line polymer according to claim 2, wherein: a first pressure sensor (1-3) is arranged in the liquid injection bin (1-1), and the first pressure sensor (1-3) is in signal connection with the processing unit.
6. The apparatus for automatically washing a water circulation line polymer according to claim 2, wherein: and a first pressure gauge (1-13) is arranged on the gas cylinder (1-2).
7. The apparatus for automatically washing a water circulation line polymer according to claim 1, wherein: and a second filtering device (3) is arranged between the liquid storage tank (2) and the circulating pump (4).
8. The apparatus for automatically washing a water circulation line polymer according to claim 1, wherein: and a flowmeter (9) is arranged on the circulating pipeline.
9. The apparatus for automatically washing a water circulation line polymer according to claim 1, wherein: the one end that the circulation pipeline is close to automatic liquid mechanism (1) of annotating is provided with upper reaches manometer (7), automatic liquid mechanism (1) of annotating is located between upper reaches manometer (7) and circulating pump (4), the one end that the circulation pipeline is close to the inlet is provided with low reaches manometer (8), low reaches manometer (8) are located between upper reaches manometer (7) and liquid storage pot (2).
10. A method for cleaning an apparatus for automatically cleaning a water circulation line polymer according to any one of claims 1 to 9, comprising the steps of:
s1, salt ions are injected into the liquid injection bin (1-1), wherein the salt ions are calcium chloride, the magnesium chloride is used as a raw material, and the ratio of the calcium ions to the magnesium ions is 3.5: 1 is 0.5 mol/L;
s2, during pipe cleaning operation, the fluid in the circulating pipeline is regarded as clear water without resistance reducing and resisting agents, the flow of the circulating pipeline is increased through the circulating pump (4), the resistance in the circulating pipeline is increased, the numerical value of the pressure difference in the circulating pipeline is obviously increased, when the pressure difference sensor (5) receives the signal, the first valve (1-4) and the second valve (1-5) are automatically opened, and the automatic liquid injection mechanism (1) conveys salt ions into the circulating pipeline;
s3, when the pipe cleaning operation is completed, the flow rate of the fluid in the circulating pipeline is reduced through the circulating pump (4), the pressure difference value in the circulating pipeline is obviously reduced, and when the pressure difference sensor (5) receives the signal, the first valve (1-4) and the second valve (1-5) are closed.
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