CN108626895B - Method for descaling wall-mounted double-opening solar heat collecting pipe - Google Patents
Method for descaling wall-mounted double-opening solar heat collecting pipe Download PDFInfo
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- CN108626895B CN108626895B CN201810440008.8A CN201810440008A CN108626895B CN 108626895 B CN108626895 B CN 108626895B CN 201810440008 A CN201810440008 A CN 201810440008A CN 108626895 B CN108626895 B CN 108626895B
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- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The invention discloses a method for descaling a wall-mounted double-opening solar heat collecting pipe, which comprises the following steps: preparing, constructing a scale removal system, heating circulating water, estimating the total water volume, adding a proper amount of citric acid solvent for removing scale, removing the scale, achieving the effect of removing the scale and finishing the scale removal. The guide cap is matched with other parts for use, and the formed new descaling system provides a new solution for the descaling problem of the solar heat collecting pipe of the existing and in-use solar water heater, thereby greatly reducing the labor intensity and saving the descaling time.
Description
Technical Field
The invention relates to the technical field of descaling, in particular to a method for descaling a wall-mounted double-opening solar heat collecting pipe.
Background
Since the solar water heater enters thousands of households, the solar water heater has the advantages of convenience, energy conservation and environmental protection, becomes one of the most popular household appliances, and also has the priority in purchasing desire of each household in the society, namely, the solar water heater is one of the household appliances which are considered to be purchased by everyone regardless of new residence or marriage.
The solar water heater heats cold water in the pipe by absorbing heat energy in sunlight through the solar heat collecting pipes arranged below the water storage barrel, and generates hot water suitable for people to take a bath by utilizing the principle that the hot water automatically rises to the upper layer of the water storage barrel and the cold water at the lower layer of the water storage barrel naturally sinks to the heat collecting pipes and is continuously and circularly heated. When the hot water is not used temporarily, the water is stored in the upper water storage barrel for standby. The solar water heater has the characteristics of 'hot water storage', so that water stored in the solar water heater is always in the cold-hot circulating water temperature change of 'heating-use water shortage-water injection cooling-reheating', particularly at night, the solar heat collecting pipe cannot heat water in the pipe any more, the water in the pipe is in a relatively static state, as the water temperature gradually decreases, water scales are slowly formed and attached to the inner wall of the solar heat collecting pipe, water scale particles in the water storage barrel sink to the heat collecting pipe due to the gravity factor and are accumulated, and the solar water heater slowly generates heat absorption efficiency (the main reason is that the water scale layer on the inner wall of the heat collecting pipe obstructs the transfer of heat energy) in the past 5 to 6 years, the phenomenon of frequent start-up of the auxiliary electric heating system. Then reasonable descaling measures must be taken on the inner part of the water heater, particularly on the heat collecting pipe, so that the solar water heater can recover the capacity of absorbing solar energy again.
The traditional manual descaling mode has two types: firstly, stop using with the water heater outage earlier, will descale agent or powder from solar water heater's super water level outlet pour into the water heater inside, through two to three days the nature dissolve the back (unable audio-visual inside incrustation scale effect of dissolving of seeing), the inside whole liquid medicine of manual discharge water heater (the liquid medicine that lies in the heat gathering pipe of water heater lower part in fact is unable exhaust), pour into clear running water into repeatedly and wash behind the raffinate, can continue to use. Secondly, the water heater is powered off and stopped, stored water in a water storage barrel of the water heater is discharged manually, the heat collecting pipes are detached from the water heater one by one, solution such as dilute hydrochloric acid is poured into the pipes, the pipe openings are plugged by wood plugs, the heat collecting pipes are repeatedly turned over, the scale inside the heat collecting pipes is dissolved, and the scale inside one heat collecting pipe can be removed in about fifteen minutes generally. For 18 to 20-tube solar water heaters, it may take about 4 to 5 hours for a mature hand to remove all heat collecting tubes, descale them separately, and then replace them back. The method has the advantages that whether the water scale in the inner container is completely removed can be visually seen, and the defects that dilute hydrochloric acid is harmful to human bodies and the environment and whether the dilute hydrochloric acid is harmful to a heat absorption coating of the inner container of the heat-collecting tube are uncertain.
The above background disclosure is only for the purpose of assisting understanding of the concept and technical solution of the present invention and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.
Disclosure of Invention
The invention aims to solve the problem that the conventional manual descaling method is time-consuming and labor-consuming.
Therefore, the invention provides a method for descaling a wall-mounted double-opening solar heat collecting pipe, which comprises the following steps:
(1) preparation work: the power plug of the solar water heater is pulled off from the power socket, the water inlet valve and the water outlet valve below the water storage barrel of the water heater are closed, the loose joint between the heat collecting pipe assembly of the balcony or the outdoor wall and the water storage barrel is disassembled, the wall hanging assembly is connected and separated with the host, and the sewage discharge hole is opened to discharge the water stored in the pipe fitting; during the period of water drainage, placing a heat collecting pipe rack special for descaling in a hall for later use;
(2) connecting: after water is put, the heat collecting pipe assembly is detached from a fixed position and is carefully decomposed, scale fragments in a loose state in the heat collecting pipe are poured out, then the heat collecting pipe is carefully placed on a special matched foamed plastic pipe placing frame, and a flow guide cap component for descaling the heat collecting pipe of the solar water heater, which is slightly larger than the outer diameter of the heat collecting pipe, is arranged on the heat collecting pipe: the cap body, the bottom cover and the water seal are taken out from the accessory box, the silicone tube at the water outlet at the top of the cap body is firstly folded and sealed by a nylon cable tie, the screw thread opening of the bottom cover is firstly sleeved upwards into the excircle of the head part of the heat-collecting tube when the cap body is assembled, then the rubber water seal groove is sleeved upwards above the bottom cover, the cap body is sleeved on the pipe opening of the heat-collecting tube, the water seal is lightly pressed into the groove at the lower part of the cap body, finally the bottom cover is tightly screwed to the screw thread position below the cap body, after the two ends of the heat-collecting tube needing descaling are sleeved with the diversion caps one by one, the heat-collecting tube is connected with each heat-collecting tube end to end by using the matched heat-resistant silicone tube, the water inlet of any diversion cap of the first heat-collecting tube is connected with the water outlet of the descaling machine by using the heat-resistant silicone tube, the water inlet of the diversion cap at the other end is connected with the water inlet of the diversion cap, the heat collecting pipes which are completely placed on the pipe placing frame are connected by analogy, and the interface of the last flow guide cap is connected with the water return pipe of the descaling machine, so that a semi-closed water circulation system is formed;
(3) heating circulating water: adding sufficient clear water into a solution barrel, starting a power supply main switch, starting a water pump, continuously adding the clear water into the solution barrel before filling water into each heat collecting pipe, stopping adding the clear water and starting an electric heating switch until a reflux port of the solution barrel has continuous water reflux and the solution barrel keeps a stable two-thirds water level, so that the whole water circulation system is in a continuous circulation and continuous heating state, and adjusting a heating temperature control knob to 85-90 ℃. When the water temperature is heated to about 50 ℃, the descaling agent required by descaling can be added.
(4) Estimate total water volume, add appropriate amount of citric acid solvent to remove scale: the descaling of the inner container of the heat collecting pipe is carried out, and besides the connection of the circulating water system, the other key point is the concentration ratio of the acid solvent: adding 40-60 g of scale remover into each liter of water;
(5) after the temperature is heated to 70 ℃ from normal temperature, water scale begins to dissolve, the dissolving speed is fastest when the temperature reaches 90 ℃, the time needs one hour, after one hour of continuous dissolution and descaling, a heating power switch can be turned off firstly, water in a water circulation system is enabled to slowly reduce the water temperature in a descaling circulation, after half an hour, a citric acid solution in a solution barrel is discharged out of a part of solution through an exhaust system of the descaling system, meanwhile, cold water is added to reduce the water temperature to be below 40 ℃, a water pump is stopped to operate, guide caps of a first heat collecting pipe and a last heat collecting pipe are respectively detached to visually observe the descaling effect, if a solar water heater which is used for more than 10 years is used, the electric heating time needs to be properly increased, and the total descaling time lasts for about 3 hours;
(6) the descaling effect is as follows: under normal conditions, namely the concentration and the temperature of the acid solution meet the conditions, the descaling water circulating system combined by the heat collecting pipes can completely remove water scales on the inner wall of the heat collecting pipe after the descaling water circulating system operates for two hours; whether the descaling work is finished or not is judged generally through the visual inspection effect of the last heat collecting pipe, if a small amount of scale still exists in the last heat collecting pipe, the guide cap of the middle heat collecting pipe can be continuously detached to observe the descaling effect, if the effect does not reach the effect of continuously finding forward, the effect of finding backward is reached, and several heat collecting pipes which do not reach the descaling effect are reconnected, and citric acid particles are added again according to the operation of the second step to continue the descaling work, of course, the fewer heat collecting pipes needing descaling are, the faster the temperature of the acid solution in the descaling machine solution barrel is raised, and the less time is spent;
(7) and (3) completing descaling: the heat collecting pipes which finish the descaling task are cleaned one by clean water and are installed back to the heat collecting pipe component bracket, the pipeline of the water storage barrel of the water heater main machine is reconnected, the power supply is plugged into the solar water heater after the installation is finished, and the solar water heater can be normally used by supplying water again according to the newly installed use operation.
Furthermore, in the step (2), the solar water heater heat collecting pipe descaling flow guide caps are provided with a plurality of flow guide caps, each flow guide cap for solar water heater heat collecting pipe descaling flow guide cap comprises a cap body, a water seal, a bottom cover and a flow guide pipe, the upper end of the cap body is provided with a water inlet and a water outlet, the water seal is arranged between the cap body and the bottom cover, and the cap body, the water seal and the bottom cover are connected through the flow guide pipe.
Further, the cap body is a hollow object with a large upper part and a small lower part, the lower opening end of the cap body is provided with external threads, and the object is a cylinder.
Furthermore, the water inlet end and the water outlet end are both provided with external threads.
Furthermore, the number of the water inlets and the number of the water outlets are both 1.
Further, the water seal is an annular rubber elastic sealing element.
Furthermore, the bottom cover is a cover-shaped cylinder with inner threads and a round hole in the middle, and the inner threads of the bottom cover and the outer threads of the lower opening end of the cap body can be matched and meshed together through a knob.
Furthermore, one end of the flow guide pipe is connected with the inner end inner teeth of the water inlet at the upper part of the cap body.
Furthermore, the honeycomb duct is a plastic hollow pipe.
Further, the scale remover in the step (3) is food-grade environment-friendly solvent citric acid particles.
Compared with the prior art, the invention has the advantages that:
1. the guide cap is matched with other parts for use, and the formed novel descaling system has the greatest characteristic that most of solar heat collecting pipes commonly used in the market at present can adopt mechanical batch descaling measures, so that the descaling time is greatly shortened, the descaling effect can be visually observed, and the residual waste liquid after the descaling is finished is environment-friendly and nuisanceless.
2. The guide cap is matched with other parts for use, and the formed new descaling system provides a new solution for the descaling problem of the solar heat collecting pipe of the existing and in-use solar water heater, thereby greatly reducing the labor intensity and saving the descaling time.
3. The guide cap is matched with other parts for use, the formed new descaling system is made of heat-resistant plastic, the manufacturing method is the traditional injection molding and demolding process, and the raw materials are easy to obtain and low in cost from the material acquisition and the finished product manufacturing, and the guide cap is easy to produce in large quantities.
4. The guide cap is matched with other parts for use, a novel descaling system is formed, the descaling method is simple, the connection is convenient, and the novel descaling system can be skillfully operated by only slightly learning and practical learning for half an hour for most people engaged in the descaling industry of solar water heaters.
Drawings
Fig. 1 is a schematic structural diagram of a descaling system for a wall-mounted double-opening solar heat collecting pipe of the invention.
FIG. 2 is a schematic structural view of a deflector cap for descaling a heat collecting pipe of a solar water heater.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
With the development of super high-rise residential buildings to county and district level, more and more households have the same building, and the space of a single roof cannot meet the common occupation requirement of installing solar water heaters, so that the wall-mounted (or called balcony-type) solar water heater is also in vogue. The descaling of the novel solar water heater is also provided with a schedule, and a method for descaling the heat collecting pipe of the novel solar water heater by using the descaling guide cap is provided.
The principle of the method is as follows: the descaling diversion cap is provided with two water inlet and outlet ports, and the water outlet port of the descaling diversion cap is blocked by a method of folding and binding a rubber pipe, so that the descaling diversion cap is changed into a single-hole diversion cap; then, the two ends of the double-opening heat gathering pipe are sleeved with the flow guide caps (at the moment, a flow guide pipe is not required to be inserted) so that the double-opening heat gathering pipe becomes a glass pipeline capable of controlling the water flow direction, and when a plurality of heat gathering pipes are connected end to end in series and are connected into a forced circulating water system of a descaling machine, a safe, reliable, energy-saving and environment-friendly heat gathering pipe descaling system is formed.
Example one
As shown in fig. 1 and 2, a pair of wall-hanging type double-opening solar heat collecting pipe descaling system comprises a solution barrel 1, an electric heating pipe 2, a water pump 3, an output pipe 4, a diversion cap 5 for descaling of a solar water heater heat collecting pipe, a heat collecting pipe 6 and a return pipe 7, wherein the electric heating pipe 2 is installed at the bottom of the solution barrel 1, one end of the water pump 3 is connected with a water inlet of the solution barrel 1, the other end of the water pump 3 is connected with the output pipe 4, the output pipe 4 is connected with a water inlet of the diversion cap 5 for descaling of the solar water heater heat collecting pipe, the diversion cap 5 for descaling of the solar water heater heat collecting pipe is connected with the heat collecting pipe 6, one end of the return pipe 7 is connected with a water outlet of the diversion cap 5 for descaling of the solar.
The guide caps 5 for descaling the heat-collecting pipes of the solar water heater are provided with a plurality of guide caps 5, each guide cap 5 for descaling the heat-collecting pipes of the solar water heater comprises a cap body 51, a water seal 52, a bottom cover 53 and a guide pipe 54, the upper end of the cap body 51 is provided with a water inlet 511 and a water outlet 512, the water seal 52 is arranged between the cap body 51 and the bottom cover 53, and the cap body 51, the water seal 52 and the bottom cover 53 are connected through the guide pipe 54.
The cap body 51 is a hollow object with a large upper part and a small lower part, the lower opening end of the cap body is provided with external threads, and the object is a cylinder.
The water inlet end and the water outlet end are both provided with external threads.
The water inlet and the water outlet are 1.
The water seal 52 is a circular rubber elastic sealing element.
The bottom cover is a cover-shaped cylinder with inner threads and a round hole in the middle, and the inner threads of the bottom cover 53 are matched with the outer threads at the lower opening end of the cap body and can be meshed together through a knob.
One end of the guide pipe 54 is connected with the inner teeth at the inner end of the water inlet at the upper part of the cap body.
The draft tube 54 is a plastic hollow tube.
The descaling method for the wall-mounted double-opening solar heat collecting pipe descaling system comprises the following steps:
1. preparation work: the power plug of the solar water heater is pulled off from the power socket, the water inlet valve and the water outlet valve below the water storage barrel of the water heater are closed, the loose joint between the heat collecting pipe assembly of the balcony or the outdoor wall and the water storage barrel is disassembled, the wall hanging assembly is connected and separated with the host, and the sewage discharge hole is opened to discharge the water stored in the pipe fitting; during the period of water drainage, placing a heat collecting pipe rack special for descaling in a hall for later use;
2. connecting: after water is put, the heat collecting pipe assembly is detached from a fixed position and is carefully decomposed, scale fragments in a loose state in the heat collecting pipe are poured out, then the heat collecting pipe is carefully placed on a special matched foamed plastic pipe placing frame, and a flow guide cap component for descaling the heat collecting pipe of the solar water heater, which is slightly larger than the outer diameter of the heat collecting pipe, is arranged on the heat collecting pipe: the cap body, the bottom cover and the water seal are taken out from the accessory box (when the outer diameter of the heat collecting pipe is smaller than one specification grade of the cap body of the guide cap, a big-small conversion head is needed), the silicone tube at the water outlet at the top of the cap body is firstly folded and sealed by a nylon ribbon, the screw tooth opening of the bottom cover is firstly sleeved upwards into the excircle of the head part of the heat collecting pipe during assembly, then the rubber water seal groove is sleeved upwards above the bottom cover, then the cap body is sleeved on the pipe opening of the heat collecting pipe (the guide pipe is not inserted at the moment), the water seal is lightly pressed into the groove at the lower part of the cap body, finally the bottom cover is screwed tightly to the lower screw tooth position of the cap body, after the two ends of the heat collecting pipe needing descaling are sleeved with the guide cap one by one, the heat collecting pipe is connected with the heat collecting pipes in sequence by using the matched heat-resistant silicone tube, namely, the water, the water inlet of the other flow guide cap is connected with the water inlet of the flow guide cap at any end of the second heat collecting pipe, the water inlet of the other flow guide cap of the second heat collecting pipe is connected with the flow guide cap of the third heat collecting pipe, the heat collecting pipes which are completely placed on the pipe placing frame are connected by analogy, and the interface of the last flow guide cap is connected with the water return pipe of the descaling system to form a semi-closed water circulation system;
3. heating circulating water: adding sufficient clear water into a solution barrel, starting a power supply main switch, starting a water pump (strictly starting an electric heating switch before a return port of a descaling machine does not return water), continuously adding clear water into the solution barrel before each heat-collecting pipe is filled with water, stopping adding the clear water and starting the electric heating switch until the return port of the descaling system has continuous water return and the solution barrel keeps a stable two-thirds water level, keeping the whole water circulation system in a continuous circulation and continuous heating state, and adjusting a heating temperature control knob to 90 ℃. When the water temperature is heated to about 50 ℃, food-grade environment-friendly solvent citric acid particles required by descaling can be added;
4. estimate total water volume, add appropriate amount of citric acid solvent to remove scale: the descaling of the heat collecting pipe inner container is carried out, and besides the connection of the circulating water system, the other key point is the concentration ratio of the acid solvent (the proper solvent concentration can achieve the purpose of descaling and save materials to avoid waste); adding 60 g of food-grade environment-friendly solvent citric acid particles into each liter of water is reasonable data obtained through continuous descaling practice for two years. A reference method is given here with respect to estimating the water volume in a water circulation system: the water capacity of each heat collecting pipe [ radius square (mm) of the inner container X3.14X heat collecting pipe length (mm) ] X number of heat collecting pipes + water capacity of the descaling machine solution barrel (about 20L);
5. and (3) grasping the descaling time: in general, a solar water heater for about 5 years is used, when the water temperature is heated from normal temperature to 70 ℃ (half an hour is generally needed), scale begins to be dissolved, the dissolving speed is fastest when the water temperature reaches 90 ℃, the time needs one hour, after one hour of continuous dissolving and descaling, a heating power switch can be turned off firstly, water in a water circulation system is enabled to slowly reduce the water temperature in a descaling cycle, after half an hour, a part of solution is discharged from a citric acid solution in a solution barrel through an exhaust system of the descaling system, meanwhile, cold water is added to reduce the water temperature to be below 40 ℃ (for preventing scalding, an electronic thermometer can be used for measuring the temperature), a water pump is stopped from running, and the diversion caps of a first heat gathering pipe and a last heat gathering pipe are respectively detached for visual observation of the descaling effect. If the solar water heater is used for more than 10 years, the electric heating time needs to be properly increased, and the total descaling time lasts for about 3 hours.
6. The descaling effect is as follows: under normal conditions (namely, the concentration and the temperature of the acid solution meet the conditions), the descaling water circulating system combined by the heat collecting pipes can completely remove water scales on the inner wall of the heat collecting pipe after the descaling water circulating system operates for two hours; whether the descaling work is finished or not is judged generally through the visual inspection effect of the last heat collecting pipe, if a small amount of scale still exists in the last heat collecting pipe, the guide cap of the middle heat collecting pipe can be continuously detached to observe the descaling effect, if the effect does not reach the effect of continuously finding forward, the effect of finding backward is reached, several heat collecting pipes which do not reach the descaling effect are reconnected, food-grade environment-friendly solvent citric acid particles are added again according to the operation of the second step to continue the descaling work, of course, the fewer heat collecting pipes needing descaling are, the faster the temperature of the acid solution in the solution barrel of the descaling system is increased, and the less time is spent;
7. and (3) completing descaling: the heat collecting pipes which finish the descaling task are cleaned one by clean water and are installed back to the heat collecting pipe component bracket, the pipeline of the water storage barrel of the water heater main machine is reconnected, the power supply is plugged into the solar water heater after the installation is finished, and the solar water heater can be normally used by supplying water again according to the newly installed use operation.
8. Health and environmental protection: because the solvent adopted by the method is food-grade environment-friendly solvent citric acid particles, after descaling is finished, the waste liquid can be directly discharged into a municipal drainage system, no pollution is caused to the environment, and the descaling heat-collecting pipe can be installed on the heat-collecting pipe assembly bracket again after being washed by clean water for one time, so that no harm to human bodies caused by residual dissolving liquid is worried.
Example two
As shown in fig. 1 and 2, a pair of wall-hanging type double-opening solar heat collecting pipe descaling system comprises a solution barrel 1, an electric heating pipe 2, a water pump 3, an output pipe 4, a diversion cap 5 for descaling of a solar water heater heat collecting pipe, a heat collecting pipe 6 and a return pipe 7, wherein the electric heating pipe 2 is installed at the bottom of the solution barrel 1, one end of the water pump 3 is connected with a water inlet of the solution barrel 1, the other end of the water pump 3 is connected with the output pipe 4, the output pipe 4 is connected with a water inlet of the diversion cap 5 for descaling of the solar water heater heat collecting pipe, the diversion cap 5 for descaling of the solar water heater heat collecting pipe is connected with the heat collecting pipe 6, one end of the return pipe 7 is connected with a water outlet of the diversion cap 5 for descaling of the solar.
The guide caps 5 for descaling the heat-collecting pipes of the solar water heater are provided with a plurality of guide caps 5, each guide cap 5 for descaling the heat-collecting pipes of the solar water heater comprises a cap body 51, a water seal 52, a bottom cover 53 and a guide pipe 54, the upper end of the cap body 51 is provided with a water inlet 511 and a water outlet 512, the water seal 52 is arranged between the cap body 51 and the bottom cover 53, and the cap body 51, the water seal 52 and the bottom cover 53 are connected through the guide pipe 54.
The cap body 51 is a hollow object with a large upper part and a small lower part, the lower opening end of the cap body is provided with external threads, and the object is a cylinder.
The water inlet end and the water outlet end are both provided with external threads.
The water inlet and the water outlet are 1.
The water seal 52 is a circular rubber elastic sealing element.
The bottom cover is a cover-shaped cylinder with inner threads and a round hole in the middle, and the inner threads of the bottom cover 53 are matched with the outer threads at the lower opening end of the cap body and can be meshed together through a knob.
One end of the guide pipe 54 is connected with the inner teeth at the inner end of the water inlet at the upper part of the cap body.
The draft tube 54 is a plastic hollow tube.
The descaling method for the wall-mounted double-opening solar heat collecting pipe descaling system comprises the following steps:
1. preparation work: the power plug of the solar water heater is pulled off from the power socket, the water inlet valve and the water outlet valve below the water storage barrel of the water heater are closed, the loose joint between the heat collecting pipe assembly of the balcony or the outdoor wall and the water storage barrel is disassembled, the wall hanging assembly is connected and separated with the host, and the sewage discharge hole is opened to discharge the water stored in the pipe fitting; during the period of water drainage, placing a heat collecting pipe rack special for descaling in a hall for later use;
2. connecting: after water is put, the heat collecting pipe assembly is detached from a fixed position and is carefully decomposed, scale fragments in a loose state in the heat collecting pipe are poured out, then the heat collecting pipe is carefully placed on a special matched foamed plastic pipe placing frame, and a flow guide cap component for descaling the heat collecting pipe of the solar water heater, which is slightly larger than the outer diameter of the heat collecting pipe, is arranged on the heat collecting pipe: the cap body, the bottom cover and the water seal are taken out from the accessory box (when the outer diameter of the heat collecting pipe is smaller than one specification grade of the cap body of the guide cap, a big-small conversion head is needed), the silicone tube at the water outlet at the top of the cap body is firstly folded and sealed by a nylon ribbon, the screw tooth opening of the bottom cover is firstly sleeved upwards into the excircle of the head part of the heat collecting pipe during assembly, then the rubber water seal groove is sleeved upwards above the bottom cover, then the cap body is sleeved on the pipe opening of the heat collecting pipe (the guide pipe is not inserted at the moment), the water seal is lightly pressed into the groove at the lower part of the cap body, finally the bottom cover is screwed tightly to the lower screw tooth position of the cap body, after the two ends of the heat collecting pipe needing descaling are sleeved with the guide cap one by one, the heat collecting pipe is connected with the heat collecting pipes in sequence by using the matched heat-resistant silicone tube, namely, the water, the water inlet of the other flow guide cap is connected with the water inlet of the flow guide cap at any end of the second heat collecting pipe, the water inlet of the other flow guide cap of the second heat collecting pipe is connected with the flow guide cap of the third heat collecting pipe, the heat collecting pipes which are completely placed on the pipe placing frame are connected by analogy, and the interface of the last flow guide cap is connected with the water return pipe of the descaling system to form a semi-closed water circulation system;
3. heating circulating water: adding sufficient clear water into a solution barrel, starting a power supply main switch, starting a water pump (strictly starting an electric heating switch before a return port of a descaling machine does not return water), continuously adding clear water into the solution barrel before each heat-collecting pipe is filled with water, stopping adding the clear water and starting the electric heating switch until the return port of the descaling system has continuous water return and the solution barrel keeps a stable two-thirds water level, keeping the whole water circulation system in a continuous circulation and continuous heating state, and adjusting a heating temperature control knob to 87 ℃. When the water temperature is heated to about 50 ℃, food-grade environment-friendly solvent citric acid particles required by descaling can be added;
4. estimate total water volume, add appropriate amount of citric acid solvent to remove scale: the descaling of the heat collecting pipe inner container is carried out, and besides the connection of the circulating water system, the other key point is the concentration ratio of the acid solvent (the proper solvent concentration can achieve the purpose of descaling and save materials to avoid waste); adding 45 grams of citric acid particles as food-grade environment-friendly solvent per liter of water is reasonable data obtained through continuous descaling practice for two years. A reference method is given here with respect to estimating the water volume in a water circulation system: the water capacity of each heat collecting pipe [ radius square (mm) of the inner container X3.14X heat collecting pipe length (mm) ] X number of heat collecting pipes + water capacity of the descaling machine solution barrel (about 20L);
5. and (3) grasping the descaling time: in general, a solar water heater for about 5 years is used, when the water temperature is heated from normal temperature to 70 ℃ (half an hour is generally needed), scale begins to be dissolved, the dissolving speed is fastest when the water temperature reaches 90 ℃, the time needs one hour, after one hour of continuous dissolving and descaling, a heating power switch can be turned off firstly, water in a water circulation system is enabled to slowly reduce the water temperature in a descaling cycle, after half an hour, a part of solution is discharged from a citric acid solution in a solution barrel through an exhaust system of the descaling system, meanwhile, cold water is added to reduce the water temperature to be below 40 ℃ (for preventing scalding, an electronic thermometer can be used for measuring the temperature), a water pump is stopped from running, and the diversion caps of a first heat gathering pipe and a last heat gathering pipe are respectively detached for visual observation of the descaling effect. If the solar water heater is used for more than 10 years, the electric heating time needs to be properly increased, and the total descaling time lasts for about 3 hours.
6. The descaling effect is as follows: under normal conditions (namely, the concentration and the temperature of the acid solution meet the conditions), the descaling water circulating system combined by the heat collecting pipes can completely remove water scales on the inner wall of the heat collecting pipe after the descaling water circulating system operates for two hours; whether the descaling work is finished or not is judged generally through the visual inspection effect of the last heat collecting pipe, if a small amount of scale still exists in the last heat collecting pipe, the guide cap of the middle heat collecting pipe can be continuously detached to observe the descaling effect, if the effect does not reach the effect of continuously finding forward, the effect of finding backward is reached, several heat collecting pipes which do not reach the descaling effect are reconnected, food-grade environment-friendly solvent citric acid particles are added again according to the operation of the second step to continue the descaling work, of course, the fewer heat collecting pipes needing descaling are, the faster the temperature of the acid solution in the solution barrel of the descaling system is increased, and the less time is spent;
7. and (3) completing descaling: the heat collecting pipes which finish the descaling task are cleaned one by clean water and are installed back to the heat collecting pipe component bracket, the pipeline of the water storage barrel of the water heater main machine is reconnected, the power supply is plugged into the solar water heater after the installation is finished, and the solar water heater can be normally used by supplying water again according to the newly installed use operation.
8. Health and environmental protection: because the solvent adopted by the method is food-grade environment-friendly solvent citric acid particles, after descaling is finished, the waste liquid can be directly discharged into a municipal drainage system, no pollution is caused to the environment, and the descaling heat-collecting pipe can be installed on the heat-collecting pipe assembly bracket again after being washed by clean water for one time, so that no harm to human bodies caused by residual dissolving liquid is worried.
EXAMPLE III
As shown in fig. 1 and 2, a pair of wall-hanging type double-opening solar heat collecting pipe descaling system comprises a solution barrel 1, an electric heating pipe 2, a water pump 3, an output pipe 4, a diversion cap 5 for descaling of a solar water heater heat collecting pipe, a heat collecting pipe 6 and a return pipe 7, wherein the electric heating pipe 2 is installed at the bottom of the solution barrel 1, one end of the water pump 3 is connected with a water inlet of the solution barrel 1, the other end of the water pump 3 is connected with the output pipe 4, the output pipe 4 is connected with a water inlet of the diversion cap 5 for descaling of the solar water heater heat collecting pipe, the diversion cap 5 for descaling of the solar water heater heat collecting pipe is connected with the heat collecting pipe 6, one end of the return pipe 7 is connected with a water outlet of the diversion cap 5 for descaling of the solar.
The guide caps 5 for descaling the heat-collecting pipes of the solar water heater are provided with a plurality of guide caps 5, each guide cap 5 for descaling the heat-collecting pipes of the solar water heater comprises a cap body 51, a water seal 52, a bottom cover 53 and a guide pipe 54, the upper end of the cap body 51 is provided with a water inlet 511 and a water outlet 512, the water seal 52 is arranged between the cap body 51 and the bottom cover 53, and the cap body 51, the water seal 52 and the bottom cover 53 are connected through the guide pipe 54.
The cap body 51 is a hollow object with a large upper part and a small lower part, the lower opening end of the cap body is provided with external threads, and the object is a cylinder.
The water inlet end and the water outlet end are both provided with external threads.
The water inlet and the water outlet are 1.
The water seal 52 is a circular rubber elastic sealing element.
The bottom cover is a cover-shaped cylinder with inner threads and a round hole in the middle, and the inner threads of the bottom cover 53 are matched with the outer threads at the lower opening end of the cap body and can be meshed together through a knob.
One end of the guide pipe 54 is connected with the inner teeth at the inner end of the water inlet at the upper part of the cap body.
The draft tube 54 is a plastic hollow tube.
The descaling method for the wall-mounted double-opening solar heat collecting pipe descaling system comprises the following steps:
1. preparation work: the power plug of the solar water heater is pulled off from the power socket, the water inlet valve and the water outlet valve below the water storage barrel of the water heater are closed, the loose joint between the heat collecting pipe assembly of the balcony or the outdoor wall and the water storage barrel is disassembled, the wall hanging assembly is connected and separated with the host, and the sewage discharge hole is opened to discharge the water stored in the pipe fitting; during the period of water drainage, placing a heat collecting pipe rack special for descaling in a hall for later use;
2. connecting: after water is put, the heat collecting pipe assembly is detached from a fixed position and is carefully decomposed, scale fragments in a loose state in the heat collecting pipe are poured out, then the heat collecting pipe is carefully placed on a special matched foamed plastic pipe placing frame, and a flow guide cap component for descaling the heat collecting pipe of the solar water heater, which is slightly larger than the outer diameter of the heat collecting pipe, is arranged on the heat collecting pipe: the cap body, the bottom cover and the water seal are taken out from the accessory box (when the outer diameter of the heat collecting pipe is smaller than one specification grade of the cap body of the guide cap, a big-small conversion head is needed), the silicone tube at the water outlet at the top of the cap body is firstly folded and sealed by a nylon ribbon, the screw tooth opening of the bottom cover is firstly sleeved upwards into the excircle of the head part of the heat collecting pipe during assembly, then the rubber water seal groove is sleeved upwards above the bottom cover, then the cap body is sleeved on the pipe opening of the heat collecting pipe (the guide pipe is not inserted at the moment), the water seal is lightly pressed into the groove at the lower part of the cap body, finally the bottom cover is screwed tightly to the lower screw tooth position of the cap body, after the two ends of the heat collecting pipe needing descaling are sleeved with the guide cap one by one, the heat collecting pipe is connected with the heat collecting pipes in sequence by using the matched heat-resistant silicone tube, namely, the water, the water inlet of the other flow guide cap is connected with the water inlet of the flow guide cap at any end of the second heat collecting pipe, the water inlet of the other flow guide cap of the second heat collecting pipe is connected with the flow guide cap of the third heat collecting pipe, the heat collecting pipes which are completely placed on the pipe placing frame are connected by analogy, and the interface of the last flow guide cap is connected with the water return pipe of the descaling system to form a semi-closed water circulation system;
3. heating circulating water: adding sufficient clear water into a solution barrel, starting a power supply main switch, starting a water pump (strictly starting an electric heating switch before a return port of a descaling machine does not return water), continuously adding clear water into the solution barrel before each heat-collecting pipe is filled with water, stopping adding the clear water and starting the electric heating switch until the return port of the descaling system has continuous water return and the solution barrel keeps a stable two-thirds water level, keeping the whole water circulation system in a continuous circulation and continuous heating state, and adjusting a heating temperature control knob to 85 ℃. When the water temperature is heated to about 50 ℃, food-grade environment-friendly solvent citric acid particles required by descaling can be added;
4. estimate total water volume, add appropriate amount of citric acid solvent to remove scale: the descaling of the heat collecting pipe inner container is carried out, and besides the connection of the circulating water system, the other key point is the concentration ratio of the acid solvent (the proper solvent concentration can achieve the purpose of descaling and save materials to avoid waste); adding 40 g of food-grade environment-friendly solvent citric acid particles into each liter of water is reasonable data obtained through continuous descaling practice for two years. A reference method is given here with respect to estimating the water volume in a water circulation system: the water capacity of each heat collecting pipe [ radius square (mm) of the inner container X3.14X heat collecting pipe length (mm) ] X number of heat collecting pipes + water capacity of the descaling machine solution barrel (about 20L);
5. and (3) grasping the descaling time: in general, a solar water heater for about 5 years is used, when the water temperature is heated from normal temperature to 70 ℃ (half an hour is generally needed), scale begins to be dissolved, the dissolving speed is fastest when the water temperature reaches 90 ℃, the time needs one hour, after one hour of continuous dissolving and descaling, a heating power switch can be turned off firstly, water in a water circulation system is enabled to slowly reduce the water temperature in a descaling cycle, after half an hour, a part of solution is discharged from a citric acid solution in a solution barrel through an exhaust system of the descaling system, meanwhile, cold water is added to reduce the water temperature to be below 40 ℃ (for preventing scalding, an electronic thermometer can be used for measuring the temperature), a water pump is stopped from running, and the diversion caps of a first heat gathering pipe and a last heat gathering pipe are respectively detached for visual observation of the descaling effect. If the solar water heater is used for more than 10 years, the electric heating time needs to be properly increased, and the total descaling time lasts for about 3 hours.
6. The descaling effect is as follows: under normal conditions (namely, the concentration and the temperature of the acid solution meet the conditions), the descaling water circulating system combined by the heat collecting pipes can completely remove water scales on the inner wall of the heat collecting pipe after the descaling water circulating system operates for two hours; whether the descaling work is finished or not is judged generally through the visual inspection effect of the last heat collecting pipe, if a small amount of scale still exists in the last heat collecting pipe, the guide cap of the middle heat collecting pipe can be continuously detached to observe the descaling effect, if the effect does not reach the effect of continuously finding forward, the effect of finding backward is reached, several heat collecting pipes which do not reach the descaling effect are reconnected, food-grade environment-friendly solvent citric acid particles are added again according to the operation of the second step to continue the descaling work, of course, the fewer heat collecting pipes needing descaling are, the faster the temperature of the acid solution in the solution barrel of the descaling system is increased, and the less time is spent;
7. and (3) completing descaling: the heat collecting pipes which finish the descaling task are cleaned one by clean water and are installed back to the heat collecting pipe component bracket, the pipeline of the water storage barrel of the water heater main machine is reconnected, the power supply is plugged into the solar water heater after the installation is finished, and the solar water heater can be normally used by supplying water again according to the newly installed use operation.
8. Health and environmental protection: because the solvent adopted by the method is food-grade environment-friendly solvent citric acid particles, after descaling is finished, the waste liquid can be directly discharged into a municipal drainage system, no pollution is caused to the environment, and the descaling heat-collecting pipe can be installed on the heat-collecting pipe assembly bracket again after being washed by clean water for one time, so that no harm to human bodies caused by residual dissolving liquid is worried.
Those skilled in the art will recognize that numerous variations are possible in light of the above description, and therefore the examples and drawings are merely intended to describe one or more specific embodiments.
While there has been described and illustrated what are considered to be example embodiments of the present invention, it will be understood by those skilled in the art that various changes and substitutions may be made therein without departing from the spirit of the invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the present invention without departing from the central concept described herein. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments and equivalents falling within the scope of the invention.
Claims (10)
1. A method for descaling a wall-mounted double-opening solar heat collecting pipe is characterized by comprising the following steps:
(1) preparation work: the power plug of the solar water heater is pulled off from the power socket, the water inlet valve and the water outlet valve below the water storage barrel of the water heater are closed, the loose joint between the heat collecting pipe assembly of the balcony or the outdoor wall and the water storage barrel is disassembled, the wall hanging assembly is connected and separated with the host, and the sewage discharge hole is opened to discharge the water stored in the pipe fitting; during the period of water drainage, placing a heat collecting pipe rack special for descaling in a hall for later use;
(2) connecting: after water is put, the heat collecting pipe assembly is detached from a fixed position and is carefully decomposed, scale fragments in a loose state in the heat collecting pipe are poured out, then the heat collecting pipe is carefully placed on a special matched foamed plastic pipe placing frame, and a flow guide cap component for descaling the heat collecting pipe of the solar water heater, which is slightly larger than the outer diameter of the heat collecting pipe, is arranged on the heat collecting pipe: the cap body, the bottom cover and the water seal are taken out from the accessory box, the silicone tube at the water outlet at the top of the cap body is firstly folded and sealed by a nylon cable tie, the screw thread opening of the bottom cover is firstly sleeved upwards into the excircle of the head part of the heat-collecting tube when the cap body is assembled, then the rubber water seal groove is sleeved upwards above the bottom cover, the cap body is sleeved on the pipe opening of the heat-collecting tube, the water seal is lightly pressed into the groove at the lower part of the cap body, finally the bottom cover is tightly screwed to the screw thread position below the cap body, after the two ends of the heat-collecting tube needing descaling are sleeved with the diversion caps one by one, the heat-collecting tube is connected with each heat-collecting tube end to end by using the matched heat-resistant silicone tube, the water inlet of any diversion cap of the first heat-collecting tube is connected with the water outlet of the descaling machine by using the heat-resistant silicone tube, the water inlet of the diversion cap at the other end is connected with the water inlet of the diversion cap, the heat collecting pipes which are completely placed on the pipe placing frame are connected by analogy, and the last flow guide cap connector is connected with the water return pipe of the descaling system to form a semi-closed water circulation system;
(3) heating circulating water: adding sufficient clear water into a solution barrel, starting a power supply main switch, starting a water pump, continuously adding the clear water into the solution barrel before filling water into each heat collecting pipe, stopping adding the clear water and starting an electric heating switch until a reflux port of the solution barrel continuously reflows water and the solution barrel keeps a stable two-thirds water level, so that the whole water circulating system is in a continuous circulating and continuous heating state, adjusting a heating temperature control knob to 85-90 ℃, and adding a descaling agent required for descaling when the water temperature is heated to about 50 ℃;
(4) estimate total water volume, add appropriate amount of citric acid solvent to remove scale: the descaling of the inner container of the heat collecting pipe is carried out, and besides the connection of the circulating water system, the other key point is the concentration ratio of the acid solvent: adding 40-60 g of scale remover into each liter of water;
(5) after heating to 70 ℃ from normal temperature, dissolving water scale, wherein the dissolving speed is fastest when the dissolving speed reaches 90 ℃, the time needs one hour, after one hour of continuous dissolving and descaling, a heating power switch can be closed firstly, water in a water circulation system is enabled to slowly reduce the water temperature in a descaling circulation, after half an hour, a citric acid solution in a solution barrel is discharged out of a part of solution through an exhaust system of a descaling system, meanwhile, cold water is added to reduce the water temperature to be below 40 ℃, a water pump is stopped to operate, guide caps of a first heat collecting pipe and a last heat collecting pipe are respectively detached to visually observe the descaling effect, if a solar water heater with the service life of more than 10 years is used, the electric heating time needs to be properly increased, and the total descaling time lasts for about 3 hours;
(6) the descaling effect is as follows: under normal conditions, the concentration and the temperature of the acid solution meet the conditions from the step (3) to the step (5), and the descaling water circulation system combined by a plurality of heat-collecting pipes can completely remove water scales on the inner wall of the heat-collecting pipe after running for two hours; judging whether the descaling work is finished or not by the visual inspection effect of the last heat collecting pipe, if the last heat collecting pipe still has a small amount of scale, continuously detaching the flow guide cap of the middle heat collecting pipe to observe the descaling effect, and if the effect does not reach the effect of continuously finding forward, finding backward, reconnecting the plurality of heat collecting pipes which do not reach the descaling effect, adding the descaling agent again according to the step (3) to continue the descaling work, of course, the fewer heat collecting pipes needing descaling are, the faster the temperature of the acid solution in the descaling machine solution barrel is raised, and the less time is spent;
(7) and (3) completing descaling: the heat collecting pipes which finish the descaling task are cleaned one by clean water and are installed back to the heat collecting pipe component bracket, the pipeline of the water storage barrel of the water heater main machine is reconnected, the power supply is plugged into the solar water heater after the installation is finished, and the solar water heater can be normally used by supplying water again according to the newly installed use operation.
2. The method for descaling a wall-mounted double-port solar heat collecting pipe according to claim 1, wherein the method comprises the following steps: the solar water heater heat-collecting pipe descaling guide caps in the step (2) are provided with a plurality of guide caps, each guide cap comprises a cap body, a water seal, a bottom cover and a guide pipe, the upper end of the cap body is provided with a water inlet and a water outlet, the water seal is arranged between the cap body and the bottom cover, and the cap body, the water seal and the bottom cover are connected through the guide pipes.
3. The method for descaling a wall-mounted double-port solar heat collecting pipe according to claim 2, wherein: the cap body is a hollow object with a large upper part and a small lower part and a lower opening, the lower opening end of the cap body is provided with external threads, and the object is a cylinder.
4. The method for descaling a wall-mounted double-port solar heat collecting pipe according to claim 2, wherein: the water inlet end and the water outlet end are both provided with external threads.
5. The method for descaling a wall-mounted double-port solar heat collecting pipe according to claim 2, wherein: the water inlet and the water outlet are 1.
6. The method for descaling a wall-mounted double-port solar heat collecting pipe according to claim 2, wherein: the water seal is a circular rubber elastic sealing element.
7. The method for descaling a wall-mounted double-port solar heat collecting pipe according to claim 2, wherein: the bottom cover is a cover-shaped cylinder with inner threads and a round hole in the middle, and the inner threads of the bottom cover and the outer threads of the lower opening end of the cap body can be matched and meshed together through a knob.
8. The method for descaling a wall-mounted double-port solar heat collecting pipe according to claim 2, wherein: one end of the flow guide pipe is connected with the inner end of the water inlet at the upper part of the cap body.
9. The method of descaling a wall-mounted dual-port solar heat-collecting pipe according to claim 8, wherein: the honeycomb duct is a plastic hollow pipe.
10. The method for descaling a wall-mounted double-port solar heat collecting pipe according to claim 1, wherein the method comprises the following steps: in the step (3), the scale remover is food-grade environment-friendly solvent citric acid particles.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2902722A1 (en) * | 2014-01-31 | 2015-08-05 | Vaillant GmbH | Solar energy storage device |
| CN106052167A (en) * | 2016-07-18 | 2016-10-26 | 唐织贵 | Device for simultaneously descaling light receiving glass tube and water storage drum of solar water heater |
| CN106052168A (en) * | 2016-07-18 | 2016-10-26 | 唐织贵 | Device for singly descaling photic glass tube of solar water heater |
| CN106369849A (en) * | 2016-10-18 | 2017-02-01 | 江苏海事职业技术学院 | Scale removal device for solar water heater and method thereof |
| CN107461947A (en) * | 2017-08-17 | 2017-12-12 | 国网山东省电力公司平度市供电公司 | A kind of solar water heater automatic flushing device |
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2018
- 2018-05-09 CN CN201810440008.8A patent/CN108626895B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2902722A1 (en) * | 2014-01-31 | 2015-08-05 | Vaillant GmbH | Solar energy storage device |
| CN106052167A (en) * | 2016-07-18 | 2016-10-26 | 唐织贵 | Device for simultaneously descaling light receiving glass tube and water storage drum of solar water heater |
| CN106052168A (en) * | 2016-07-18 | 2016-10-26 | 唐织贵 | Device for singly descaling photic glass tube of solar water heater |
| CN106369849A (en) * | 2016-10-18 | 2017-02-01 | 江苏海事职业技术学院 | Scale removal device for solar water heater and method thereof |
| CN107461947A (en) * | 2017-08-17 | 2017-12-12 | 国网山东省电力公司平度市供电公司 | A kind of solar water heater automatic flushing device |
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