CN112304154A - Automatic cleaning device and method for scale layer on inner wall of heat exchange pipe of thermal equipment - Google Patents
Automatic cleaning device and method for scale layer on inner wall of heat exchange pipe of thermal equipment Download PDFInfo
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- CN112304154A CN112304154A CN202011317717.0A CN202011317717A CN112304154A CN 112304154 A CN112304154 A CN 112304154A CN 202011317717 A CN202011317717 A CN 202011317717A CN 112304154 A CN112304154 A CN 112304154A
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- controller
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- heat exchange
- tube
- cleaning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/003—Control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/04—Feeding and driving arrangements, e.g. power operation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G3/00—Rotary appliances
- F28G3/04—Rotary appliances having brushes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses an automatic cleaning device and method for scale layers on the inner wall of a heat exchange tube of a thermal device.
Description
Technical Field
The invention belongs to the field of chemical analysis of inner walls of metal materials, and particularly relates to an automatic cleaning device and method for scale layers on inner walls of heat exchange tubes of thermal equipment.
Background
When a thermal power generating unit and steam power equipment are periodically overhauled, chemical inspection is needed to master the conditions of corrosion, scaling or salt deposition of the thermal power equipment, and whether a water working condition treatment method adopted by the unit in the running period is reasonable or not and whether monitoring is effective or not are evaluated, improvement measures are provided, and the safe and economic running of the unit is ensured. The pipe cutting inspection of all stages of heating surfaces of the thermal equipment is one of important works. The pipe cutting inspection comprises the steps of measuring the scale amount, recording and analyzing the corrosion and scaling conditions of the inner surface, and the like, wherein the scale amount is usually measured by an acid pickling method for the scale layers on the inner walls of a water wall pipe, an economizer pipe, a low-temperature superheater pipe, a condenser pipe and the like, and after acid pickling, whether the inner surface of a pipe sample has corrosion pits can be judged more intuitively and accurately, so that the size, the depth, the quantity and the like of the corrosion pits can be conveniently measured.
The pickling process of the tube sample is generally manually operated by experimenters, and comprises the steps of preparing a cleaning solution, immersing the tube sample into the cleaning solution, stirring the cleaning solution, cleaning the inner wall of the tube sample by using a brush, taking out the tube sample, observing whether a scale layer on the inner wall is completely dissolved, and the like. The cleaning solution is usually 5% hydrochloric acid solution, a certain amount of corrosion inhibitor is added, the problems of acid liquor splashing, hydrochloric acid volatilization, danger to body health and the like exist in the process of preparing the cleaning solution and the subsequent pickling process of experimenters, waste liquid after pickling is manually collected and treated, and the risk of contact between the experimenters and dangerous chemicals is increased. If a cleaning device can be constructed, the device can automatically prepare cleaning solution, automatically clean the inner wall of a pipe sample and automatically collect pickling waste liquid, the whole cleaning process does not need manual contact with acid liquor, the problems can be better solved, but similar disclosure is not available in the prior art.
Disclosure of Invention
The invention aims to research the full-automatic cleaning process of the scale layer on the inner wall of the metal tube sample, and provides an automatic cleaning device and method for the scale layer on the inner wall of the heat exchange tube of the thermal equipment, which can ensure the cleaning effect of the tube sample, avoid the contact of experimenters and acid liquor in the cleaning process, improve the occupational health safety level of the experimenters and reduce the environmental pollution.
In order to achieve the purpose, the automatic cleaning device for the scale layer on the inner wall of the heat exchange tube of the thermal equipment comprises a medicament configuration assembly and a thermostatic bath, at least one cleaning container is arranged in the thermostatic bath, a brush used for cleaning a tube sample is arranged in the cleaning container, a waste liquid discharge tube is arranged at the bottom of the cleaning container, the waste liquid discharge tube is connected into a waste liquid collecting tank, the medicament configuration assembly is connected into the cleaning container through a cleaning solution input tube, a first flow regulating valve is arranged on the cleaning solution input tube, a second flow regulating valve is arranged on the waste liquid discharge tube, the first flow regulating valve and the second flow regulating valve are all connected with a controller, and the controller is used for controlling the first flow regulating valve and.
The reagent configuration assembly comprises an acid tank, a desalting water tank, a corrosion inhibitor tank and other reagent tanks, wherein the acid tank, the desalting water tank, the corrosion inhibitor tank and the other reagent tanks are all connected with a controller, and the controller is used for outputting and proportioning the acid tank, the desalting water tank, the corrosion inhibitor tank and the other reagent tanks.
Thiourea capable of eliminating the copper plating phenomenon on the inner wall of the tube sample is filled in other medicament tanks.
Be provided with the spring in the washing container, be fixed with the pipe appearance anchor clamps on the spring, spring coupling controller, the controller is used for controlling the flexible volume of spring.
Be provided with the agitator that can dismantle and change in the washing container, agitator connection director, the controller is used for controlling the switching of agitator.
The cleaning container is provided with a cover plate.
The constant temperature medium of the constant temperature groove is water bath or oil bath.
A working method of an automatic cleaning device for scale layers on the inner wall of a heat exchange tube of a thermal device comprises the following steps:
s1, fixing the processed tube sample in a cleaning container;
s2, the controller controls to open the first flow regulating valve, so that the medicament in the medicament preparation assembly is led into the cleaning container through the cleaning solution input pipe according to the required proportion;
s3, controlling the thermostatic bath to be heated to the required temperature by the controller, and brushing the tube sample by the cleaning container;
and S4, after the brushing is finished, the controller controls the opening of the second flow regulating valve to discharge the waste liquid into the waste liquid collecting tank through the waste liquid discharge pipe.
And S1, fixing the processed tube sample on a tube sample clamp, completely placing the tube sample clamp and the tube sample into the cleaning container by controlling a spring through a controller, and closing a cover plate to seal the cleaning container.
In S3, during brushing, the controller starts the stirrer to stir;
in S4, after the brushing is completed, the controller stops the stirring by the stirrer and the brushing by the brush, opens the cover plate, and controls the spring to extend out of the tube-like jig.
Compared with the prior art, the device disclosed by the invention has the advantages that the medicament configuration is carried out through the medicament configuration assembly, the opening and closing of the first flow regulating valve and the second flow regulating valve are controlled through the controller, the functions of automatically feeding cleaning agents, automatically controlling the cleaning time and automatically collecting pickling waste liquid are realized, the experiment personnel are prevented from closely contacting acid liquid in the cleaning process, the injury to the human body caused by acid liquid splashing and the like is prevented, the occupational health safety level is improved, the operation is flexible and convenient, and the cleaning efficiency and the safety are improved.
The method disclosed by the invention has the advantages that during specific operation, the cleaning solution is automatically prepared, the inner wall of the tube sample is automatically cleaned, the pickling waste liquid is automatically collected, the cleaning effect of the inner wall of the tube sample can be observed at any time according to the requirement during cleaning, the cleaning time, the cleaning strength and the cleaning agent formula are adjusted, the operation is flexible, the experiment personnel are prevented from being in close contact with the acid liquid in the whole cleaning process, the damage to the human body caused by acid liquid splashing and the like is prevented, and the pollution of the acid liquid volatilization to the environment is reduced through the sealing of the acid liquid tank and.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is an acid tank, 2 is a desalting water tank, 3 is a corrosion inhibitor tank, 4 is other medicament tanks, 5 is a cleaning solution input pipe, 6 is a first flow regulating valve, 7 is a cleaning container, 8 is a pipe sample clamp, 9 is a stirrer, 10 is a spring, 11 is a cover plate, 12 is a constant temperature tank, 13 is a waste liquid discharge pipe, 14 is a second flow regulating valve, 15 is a waste liquid collecting tank, and 16 is a controller.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, an automatic cleaning device for scale layers on the inner wall of a heat exchange tube of a thermal power equipment comprises a reagent configuration component and a thermostatic bath 12, at least one cleaning container 7 is arranged in the thermostatic bath 12, a brush used for cleaning tube samples is arranged in the cleaning container 7, a waste liquid discharge pipe 13 is arranged at the bottom of the cleaning container 7, the waste liquid discharge pipe 13 is connected to a waste liquid collecting tank 15, the reagent configuration component is connected to the cleaning container 7 through a cleaning solution input pipe 5, a first flow regulating valve 6 is arranged on the cleaning solution input pipe 5, a second flow regulating valve 14 is arranged on the waste liquid discharge pipe 13, the first flow regulating valve 6 and the second flow regulating valve 14 are both connected with a controller 16, and the controller 16 is used for controlling the opening and closing of the first flow regulating valve. The reagent configuration component comprises an acid tank 1, a desalting water tank 2, a corrosion inhibitor tank 3 and other reagent tanks 4, wherein the acid tank 1, the desalting water tank 2, the corrosion inhibitor tank 3 and the other reagent tanks 4 are all connected with a controller 16, and the controller 16 is used for outputting and proportioning the acid tank 1, the desalting water tank 2, the corrosion inhibitor tank 3 and the other reagent tanks 4. A spring 10 is arranged in the cleaning container 7, a tube-like clamp 8 is fixed on the spring 10, the spring 10 is connected with a controller 16, and the controller 16 is used for controlling the expansion and contraction amount of the spring 10. The cleaning container 7 is provided with a detachable and replaceable agitator 9, the agitator 9 is connected with a controller 16, and the controller 16 is used for controlling the opening and closing of the agitator 9. The cleaning vessel 7 is provided with a cover plate 11, and after the cover plate 11 is opened, the tube-like jig 8 can be completely immersed in or extended out of the cleaning vessel 7 by a spring 10.
Preferably, the thermostatic medium of the thermostatic bath 12 is a water bath or an oil bath.
Preferably, thiourea capable of eliminating the copper plating phenomenon on the inner wall of the tube sample is filled in the other agent tank 4.
The acid tank 1, the demineralized water tank 2, the corrosion inhibitor tank 3, the other agent tank 4, the inner wall of the cleaning container 7, the pipe sample clamp 8, the stirrer 9, the spring 10, the cleaning solution input pipe 5 which is contacted with the acid liquor, the first flow regulating valve 6, the waste liquid discharge pipe 13 and the second flow regulating valve 14 are all made of acid corrosion resistant materials.
The working method of the automatic cleaning device for the scale layer on the inner wall of the heat exchange tube of the thermal equipment comprises the following steps:
fixing the processed tube sample on a tube sample clamp 8, completely placing the tube sample clamp 8 and the tube sample into a cleaning container 7 by controlling a spring 10 through a controller 16, closing a cover plate 11, completely sealing the cleaning container 7 at the moment, opening a first flow regulating valve 6 by the controller 16, controlling an acid tank 1, a desalting water tank 2 and a corrosion inhibitor tank 3 to discharge corresponding solutions according to a certain proportion, mixing 5% hydrochloric acid cleaning solution into the cleaning container 7 through a cleaning solution input pipe 5, automatically closing the first flow regulating valve 6 after the cleaning solution reaches a water level line of the cleaning container 7, stopping outputting the acid tank 1, the desalting water tank 2 and the corrosion inhibitor tank 3, opening a stirrer 9 and a constant temperature tank 12 by the controller 16, controlling the heating temperature of the constant temperature tank 12 to be not more than 50 ℃, controlling a soft brush to periodically brush the tube sample, stopping stirring of the stirrer 9 and brushing of the soft brush through the controller 16 after cleaning for a period of time, and opening a cover plate 11, extending a control spring 10 out of the tube sample clamp 8, observing the cleaning effect of the scale layer on the inner wall of the tube sample, if the cleaning is not finished, re-immersing the tube sample clamp 8 and the tube sample into the cleaning container 7 by the control spring 10, closing the cover plate 11, continuing to clean, if the cleaning is finished, taking the tube sample out of the tube sample clamp 8, immersing the tube sample clamp 8 into the cleaning container by the control spring 10, closing the cover plate 11, closing a thermostatic bath 12, opening a second flow control valve 14 on a waste liquid discharge pipe 13, automatically discharging the pickling waste liquid in the cleaning container 7 into a waste liquid collecting box 15, and if necessary, opening a first flow control valve 6, controlling the desalting water tank 2 to discharge desalting water, flushing the cleaning container 7 and discharging the waste liquid into the waste liquid collecting box 15.
If in the cleaning process, the phenomenon of copper plating on the inner wall of the tube sample is observed, the first flow regulating valve 5 is immediately opened, and the other medicament tanks 4 are controlled to discharge proper amount of medicament and added into the cleaning container 7, so that the phenomenon of copper plating disappears.
According to the invention, through automatically preparing the cleaning solution, automatically cleaning the inner wall of the pipe sample and automatically collecting the pickling waste liquid, the experiment personnel are prevented from being in close contact with the acid liquid in the cleaning process, the injury to the human body caused by splashing of the acid liquid and the like is prevented, the occupational health safety level is improved, and the pollution of the volatilization of the acid liquid to the environment is reduced through the sealing of the acid liquid tank and the cleaning container.
The invention realizes the automation of the scale layer pickling process in the processes of scale quantity measurement and corrosion state diagnosis during chemical inspection of heat exchange tube cutting of thermal equipment, can check the cleaning effect of the inner wall of the tube sample at any time according to requirements during cleaning, and correspondingly adjusts the cleaning time, strength and cleaning agent formula, thereby having flexible and convenient operation and improving the cleaning efficiency and safety.
Claims (10)
1. An automatic cleaning device for scale layers on the inner wall of a heat exchange tube of a thermodynamic device is characterized by comprising a reagent configuration component and a thermostatic bath (12), wherein at least one cleaning container (7) is arranged in the thermostatic bath (12), a brush for cleaning tube samples is arranged in the cleaning container (7), a waste liquid discharge pipe (13) is arranged at the bottom of the cleaning container (7), the waste liquid discharge pipe (13) is connected into a waste liquid collecting tank (15), the reagent configuration component is connected into the cleaning container (7) through a cleaning solution input pipe (5), a first flow regulating valve (6) is arranged on the cleaning solution input pipe (5), a second flow regulating valve (14) and the first flow regulating valve (6) are arranged on the waste liquid discharge pipe (13), the second flow regulating valves (14) are connected with a controller (16), and the controller (16) is used for controlling the opening and closing of the first flow regulating valve (6) and the second flow regulating valve (14).
2. The automatic cleaning device for the scale layer on the inner wall of the heat exchange tube of the thermal equipment as claimed in claim 1, wherein the agent configuration component comprises an acid tank (1), a demineralized water tank (2), a corrosion inhibitor tank (3) and other agent tanks (4), the acid tank (1), the demineralized water tank (2), the corrosion inhibitor tank (3) and the other agent tanks (4) are all connected with a controller (16), and the controller (16) is used for output proportioning of the acid tank (1), the demineralized water tank (2), the corrosion inhibitor tank (3) and the other agent tanks (4).
3. The automatic cleaning device for the scale layer on the inner wall of the heat exchange tube of the thermal equipment as claimed in claim 2, wherein thiourea capable of eliminating the copper plating phenomenon on the inner wall of the tube sample is arranged in the other reagent tank (4).
4. The automatic cleaning device for the scale layer on the inner wall of the heat exchange tube of the thermal equipment as claimed in claim 1, wherein a spring (10) is arranged in the cleaning container (7), a tube sample clamp (8) is fixed on the spring (10), the spring (10) is connected with a controller (16), and the controller (16) is used for controlling the expansion amount of the spring (10).
5. The automatic cleaning device for the scale layer on the inner wall of the heat exchange tube of the thermal equipment as claimed in claim 1, wherein a detachable and replaceable stirrer (9) is arranged in the cleaning container (7), the stirrer (9) is connected with a controller (16), and the controller (16) is used for controlling the opening and closing of the stirrer (9).
6. The automatic cleaning device for the scale layer on the inner wall of the heat exchange tube of the thermal equipment as claimed in claim 1, wherein a cover plate (11) is arranged on the cleaning container (7).
7. The automatic cleaning device for the scale layer on the inner wall of the heat exchange tube of the thermal equipment as claimed in claim 1, wherein the thermostatic medium of the thermostatic bath (12) is a water bath or an oil bath.
8. The working method of the automatic cleaning device for the scale layer on the inner wall of the heat exchange tube of the thermal equipment as claimed in claim 1 is characterized by comprising the following steps:
s1, fixing the processed tube sample in a cleaning container (7);
s2, the controller (16) controls to open the first flow regulating valve (6) so that the medicament in the medicament preparation assembly is led into the cleaning container (7) through the cleaning solution input pipe (5) according to the required proportion;
s3, the controller (16) controls the thermostatic bath (12) to heat to the required temperature, and the cleaning container (7) brushes the tube sample;
and S4, after the brushing is finished, the controller (16) controls the second flow regulating valve (14) to be opened, so that the waste liquid is discharged into the waste liquid collecting tank (15) through the waste liquid discharge pipe (13).
9. The operation method of the automatic cleaning device for the scale layer on the inner wall of the heat exchange tube of the thermal equipment as claimed in claim 8, wherein in S1, the processed tube sample is fixed on the tube sample clamp (8), the tube sample clamp (8) and the tube sample are completely placed into the cleaning container (7) by controlling the spring (10) through the controller (16), and the cover plate (11) is closed to seal the cleaning container (7).
10. The working method of the automatic cleaning device for the scale layer on the inner wall of the heat exchange tube of the thermal equipment as claimed in claim 8, wherein in S3, the controller (16) starts the stirrer (9) to stir during brushing;
in S4, after the brushing is completed, the controller (16) stops the stirring of the stirrer (9) and the brushing of the brush, opens the cover plate (11), and controls the spring (10) to extend out of the tube-like jig (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011317717.0A CN112304154A (en) | 2020-11-23 | 2020-11-23 | Automatic cleaning device and method for scale layer on inner wall of heat exchange pipe of thermal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011317717.0A CN112304154A (en) | 2020-11-23 | 2020-11-23 | Automatic cleaning device and method for scale layer on inner wall of heat exchange pipe of thermal equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112304154A true CN112304154A (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011317717.0A Pending CN112304154A (en) | 2020-11-23 | 2020-11-23 | Automatic cleaning device and method for scale layer on inner wall of heat exchange pipe of thermal equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112304154A (en) |
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2020
- 2020-11-23 CN CN202011317717.0A patent/CN112304154A/en active Pending
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