CN215139579U - Production system of propylene glycol type solar low-temperature heat utilization working medium - Google Patents
Production system of propylene glycol type solar low-temperature heat utilization working medium Download PDFInfo
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- CN215139579U CN215139579U CN202120365615.XU CN202120365615U CN215139579U CN 215139579 U CN215139579 U CN 215139579U CN 202120365615 U CN202120365615 U CN 202120365615U CN 215139579 U CN215139579 U CN 215139579U
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Abstract
The utility model provides a propylene glycol type solar energy low temperature heat utilization working medium production system, which comprises a propylene glycol feeding pipeline, a deionized water feeding pipeline, an additive feeding pipeline and a pigment feeding pipeline, wherein the additive feeding pipeline comprises an additive feeding pipe main path and a plurality of additive feeding pipe branch paths, the additive feeding pipe branch paths are all communicated with the additive feeding pipe main path, the pigment feeding pipeline comprises a pigment feeding pipe main path and a plurality of pigment feeding pipe branch paths, the pigment feeding pipe branch paths are all communicated with the pigment feeding pipe main path, the propylene glycol feeding pipeline, the deionized water feeding pipeline, the additive feeding pipe main path and the pigment feeding pipe main path are all communicated with a mixing pipeline, a pipe cleaner is arranged in the mixing pipeline, and the mixing pipeline is communicated with an inlet of a working medium product tank, the utility model can realize continuous production and obviously improve the production efficiency, the whole process adopts pipeline conveying and mixing, thereby avoiding multiple times of material pouring and reducing material leakage and loss.
Description
Technical Field
The utility model belongs to the technical field of the chemical production system, especially, relate to a production system of propylene glycol type solar energy low temperature heat utilization working medium.
Background
Solar energy utilization is an important field of renewable resource utilization, and the most mature product of global solar energy low-temperature heat utilization belongs to a solar water heater at present. The solar water heater industry in China forms a mutually matched industrial chain of mechanical equipment, raw material processing, marketing, installation service and the like, and a plurality of famous brand enterprises are emerged.
Compared with a vacuum tube solar water heater, the flat plate solar water heater has the advantages of good safety, easy integrated installation with a building, strong pressure resistance in the application fields of urban residential users and engineering, and more obvious advantages of being suitable for a pressure-bearing system. Since 2010, the research and development of the flat-plate solar water heater break through the technical and structural defects of the initial product, the market sales in China is increased year by year, and the flat-plate solar water heater occupies about 30-40% of the market share in China at present; in the European and American markets, the flat-plate solar water heater occupies more than 90% of the market share.
The operation of the flat plate solar water heater usually needs to heat the heat-conducting working medium first, and the heat collector absorbs heat energy and conducts the heat energy to the heat-conducting working medium. Along with the rise of the temperature of the heat-conducting working medium, the heated liquid working medium is heated in the heat collector under the action of the circulation of the pump, then enters the heat exchanger of the water storage tank to transfer heat energy to the living water through heat exchange, and the heat-conducting working medium is gradually cooled after heat transfer. The cooled heat-conducting working medium is returned to the heat collector and is heated again in the heat collecting plate. This process is repeated until the domestic water in the water storage tank is heated to the set temperature.
The heat conducting working medium in the flat-plate solar water heater is called as solar low-temperature heat utilization working medium in the field of scientific research. The propylene glycol type solar low-temperature heat utilization working medium has the natural advantages of high temperature resistance, low freezing point, no volatility, weak metal corrosion, difficult oxidation, long service life, low price, easy obtainment and the like, and is widely applied to flat-plate solar water heaters. Jiangfu et al in the patent Heat transfer Medium for solar Water heaters (patent No. 201410063609.3) propose a method for preparing a heat transfer medium for solar Water heaters by adding additives such as polymaleic anhydride, alginic acid, borax and the like into propylene glycol and mixing in a batch reactor. The heat exchange medium for the solar water heater produced by the method enhances the metal corrosion inhibition effect and prolongs the service life, but the production process adopts an intermittent production mode of physically mixing the reaction kettles, has lower production efficiency and is not beneficial to large-scale batch production. Furthermore, the price of the organic carboxylic acid synthesized by polymaleic anhydride, alginic acid and the like is higher, and the production cost is increased. In addition, additives such as borax and the like are harmful to human bodies and are not intrinsically safe heat transfer working media, which is more unfavorable for popularization and promotion of products.
In conclusion, a novel and efficient continuous production process and system are urgently needed to be developed in the production of the solar low-temperature heat utilization working medium, so that the production efficiency and the automation level of the preparation process of the propylene glycol type solar low-temperature heat utilization working medium are improved.
Disclosure of Invention
In view of this, the present invention provides a propylene glycol type solar low-temperature heat utilization working medium production system to overcome the defects in the prior art.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this: the utility model provides a production system of propylene glycol type solar energy low temperature heat utilization working medium, includes propylene glycol feed line, deionized water feed line, additive feed line and pigment feed line, the additive feed line includes an additive inlet pipe main road and a plurality of additive inlet pipe branch road, and a plurality of additive inlet pipe branch roads all communicate with additive inlet pipe main road, pigment feed line includes a pigment inlet pipe main road and a plurality of pigment inlet pipe branch roads, and a plurality of pigment inlet pipe branch roads all communicate with pigment inlet pipe main road, and propylene glycol feed line, deionized water feed line, additive inlet pipe main road and pigment inlet pipe main road all communicate with the mixing pipeline, are equipped with the pig in the mixing pipeline, and the mixing pipeline communicates with the entry of working medium product jar.
Furthermore, the additive feeding pipe branch comprises a sebacic acid feeding pipe branch, a disodium hydrogen phosphate feeding pipe branch, a sodium nitrate feeding pipe branch, a sodium benzoate feeding pipe branch, a benzotriazole feeding pipe branch and a potassium hydroxide feeding pipe branch; the pigment feeding pipe branch comprises a lemon yellow feeding pipe branch, a weak acid green feeding pipe branch and a weak acid blue feeding pipe branch.
Furthermore, the propylene glycol feeding pipeline is communicated with the starting point of the pipe cleaner, the deionized water pipeline, the additive feeding pipe main pipeline and the pigment feeding pipe main pipeline are communicated with the middle point of the pipe cleaner, and the inlet of the working medium product tank is communicated with the end point of the pipe cleaner.
Furthermore, a feeding flowmeter, a feeding flow regulating valve and a feeding automatic switch valve are respectively arranged on the propylene glycol feeding pipeline, the deionized water feeding pipeline, the pigment feeding pipe branch and the additive feeding pipe branch
Furthermore, the material of the feeding flowmeter, the feeding flow regulating valve, the feeding automatic switch valve and the feeding pipeline is stainless steel.
The feeding flowmeter, the flow regulating valve and the feeding switch valve are all commercially available products.
The feed flowmeter is a high-precision flowmeter, and can be selected from Micro Motion F series Coriolis flowmeters manufactured by Emerson, RCCT39 series mass flowmeters manufactured by the Yanghe company, and Proline PromassF 300 series mass flowmeters manufactured by E + H company.
Compared with the prior art, a production system of propylene glycol type solar energy low temperature heat utilization working medium have following beneficial effect:
1. the propylene glycol solar low-temperature heat utilization working medium production system only uses common chemical equipment such as pipelines, valves, flowmeters, pipe cleaners and the like, does not contain special materials and imported equipment, and is simple in system and low in investment cost;
2. compared with the batch production process of reaction kettle type mixing, the utility model realizes continuous production, obviously improves the production efficiency, adopts pipeline transportation and mixing in the whole process, avoids multiple times of material pouring, and reduces the material leakage and loss;
3. the production system of the propylene glycol type solar low-temperature heat utilization working medium realizes online mixing through proportional flow control, does not need mechanical stirring, reduces the production cost, avoids the risk of mechanical injury of workers, and is safer in the production process;
4. the propylene glycol type solar low-temperature heat utilization working medium production system is high in automation degree, and the adding and mixing processes of materials such as propylene glycol, deionized water, additives and pigments are all automatically controlled.
5. A production technology and system of propylene glycol type solar energy low temperature heat utilization working medium, set up the dredging pipe ware at the hybrid line, the at utmost reduces the volume of remaining, avoids cross contamination.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic flow diagram of a production system of a propylene glycol type solar low-temperature heat utilization working medium according to an embodiment of the present invention.
Description of reference numerals:
the code numbers of the automatic control instrument and the valve in the figure 1 are as follows:
an FT 101-propylene glycol feed flow meter; FT 102-deionized water feed flow meter; an FT 111-sebacic acid feed flow meter; FT 112-disodium phosphate feed flow meter; FT 113-sodium nitrate feed flow meter; FT 114-sodium benzoate feed flow meter; a FT 115-benzotriazole feed flow meter; FT 116-potassium hydroxide feed flow meter; FT 121-lemon yellow feed flow meter; FT 122-Weak acid Green feed flowmeter; FT 123-weak acid blue feed flow meter;
FV 101-propylene glycol feed flow control valve; FV 102-deionized water feed flow control valve; FV 111-sebacic acid feed flow regulating valve; FV 112-disodium hydrogen phosphate feed flow control valve; FV 113-sodium nitrate feed flow regulating valve; FV 114-sodium benzoate feed flow control valve; FV 115-benzotriazole feeding flow regulating valve; FV 116-potassium hydroxide feed flow control valve; FV 121-lemon yellow feed flow regulating valve; FV 122-weak acid green feed flow regulating valve; FV 123-weak acid blue feed flow regulating valve;
an automatic XV 101-propylene glycol feeding switch valve; XV 102-deionized water feed automatic on-off valve; an automatic charge switching valve for XV 111-sebacic acid; an XV 112-disodium hydrogen phosphate feed automatic on-off valve; an automatic charge switch valve for XV 113-sodium nitrate; XV 114-sodium benzoate feeding automatic switch valve; an automatic charging on-off valve of XV 115-benzotriazole; an XV 116-Potassium hydroxide feed automatic on-off valve; an XV 121-lemon yellow feeding automatic switch valve; XV 122-Weak acid Green feed auto-on-off valve; an XV 123-weak acid blue feeding automatic switch valve;
PS 131-pig start point; PS132-PS134 pig midpoint; PS 135-pig termination point;
in FIG. 1, the material code is: 201-propylene glycol feed; 202-deionized water feed; 211-sebacic acid feed; 212-disodium hydrogen phosphate feed; 213-sodium nitrate feed; 214-sodium benzoate feed; 215-benzotriazole feeding; 216-potassium hydroxide feed; 221-lemon yellow feed; 222-weak acid green feed; 223-weak acid blue feed; 231-mixing materials; 232-discharging the product.
Detailed Description
It should be noted that, in the present invention, 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 the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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.
All numerical designations such as temperature, pressure, length, mass, flow, including ranges, are approximations. It is to be understood, although not always explicitly stated that all numerical designations are preceded by the term "about". It is also to be understood that, although not always explicitly recited, the reagents described herein are merely exemplary and equivalents thereof are known in the art.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
According to the order requirement, 50 tons of propylene glycol solar low-temperature heat utilization working medium with the freezing point not higher than-20 ℃ and yellow apparent color is produced. Firstly, determining the mass ratio of each component in the working medium as follows: 43% of propylene glycol and 54% of deionized water; the mass ratio of the additive is as follows: 0.5% of sebacic acid, 0.8% of disodium hydrogen phosphate, 0.2% of sodium nitrate, 0.4% of sodium benzoate, 0.4% of benzotriazole and 0.6% of potassium hydroxide; 0.1 percent of pigment (lemon yellow). Secondly, feeding propylene glycol and deionized water in the same proportion, adding sebacic acid, disodium hydrogen phosphate and potassium hydroxide when the feeding amount of the propylene glycol is 35% of the calculated value, then adding sodium nitrate, sodium benzoate and benzotriazole, and finally adding pigment lemon yellow. Third, when the amount of propylene glycol and deionized water added reaches 90% of the calculated amount, the control system automatically reduces the feed rate of propylene glycol and deionized water for accurate metering. When the feeding amount of each component reaches 100 percent of the calculated value, the automatic switch valve on each feeding pipeline is immediately and automatically closed. Fourthly, the tube cleaning ball is launched from the starting point of the tube cleaner to the end point of the tube cleaner, all materials remained in the mixing tube are cleaned out and enter a final product, and the production task is finished.
The propylene glycol type solar low-temperature heat utilization working medium product produced at this time is subjected to chemical analysis to obtain the following data and conclusion: the ice point is-21.2 ℃, the boiling point is 102.8 ℃, the pH value is 7.8, the appearance is free of precipitates and suspended matters, the product is clear, transparent and bright yellow, and has no pungent smell, and the product quality meets the requirements of NB/T34073-2018.
Example 2
To the propylene glycol type solar low-temperature heat utilization working medium production process and system related to the utility model, the operation process of the embodiment 2 is the same as that of the embodiment 1. Example 2 differs from example 1 in that:
according to the order requirement, 80 tons of propylene glycol type solar low-temperature heat utilization working medium with the freezing point not higher than-25 ℃ and green apparent color is produced. Firstly, determining the mass ratio of each component in the working medium as follows: 44.8% of propylene glycol and 52.2% of deionized water; the mass ratio of the additive is as follows: 0.7 percent of sebacic acid, 0.7 percent of disodium hydrogen phosphate, 0.4 percent of sodium nitrate, 0.3 percent of sodium benzoate, 0.2 percent of benzotriazole and 0.6 percent of potassium hydroxide; pigment (weak acid green) 0.1%. Secondly, the propylene glycol and the deionized water are fed in the same proportion, sebacic acid, disodium hydrogen phosphate and potassium hydroxide are added when the feeding amount of the propylene glycol is 38% of the calculated value, then sodium nitrate, sodium benzoate and benzotriazole are added, and finally pigment weak acid green is added.
The propylene glycol type solar low-temperature heat utilization working medium product produced at this time is subjected to chemical analysis to obtain the following data and conclusion: the ice point is-25.8 ℃, the boiling point is 103.2 ℃, the pH value is 7.8, the appearance is free of precipitates and suspended matters, the product is clear, transparent and light green, and has no pungent smell, and the product quality meets the requirements of NB/T34073-2018.
Example 3
To the propylene glycol type solar low-temperature heat utilization working medium production process and system related to the utility model, the operation process of the embodiment 3 is the same as that of the embodiment 1. Example 3 differs from example 1 in that:
according to the order requirement, 100 tons of propylene glycol solar low-temperature heat utilization working medium with the freezing point not higher than-30 ℃ and blue apparent color is produced. Firstly, determining the mass ratio of each component in the working medium as follows: 46.3% of propylene glycol and 50.7% of deionized water; the mass ratio of the additive is as follows: 0.7 percent of sebacic acid, 0.7 percent of disodium hydrogen phosphate, 0.4 percent of sodium nitrate, 0.3 percent of sodium benzoate, 0.2 percent of benzotriazole and 0.6 percent of potassium hydroxide; pigment (weak acid blue) 0.1%. Secondly, feeding propylene glycol and deionized water in the same proportion, adding sebacic acid, disodium hydrogen phosphate and potassium hydroxide when the feeding amount of the propylene glycol is 40% of the calculated value, then adding sodium nitrate, sodium benzoate and benzotriazole, and finally adding pigment weak acid blue.
The propylene glycol type solar low-temperature heat utilization working medium product produced at this time is subjected to chemical analysis to obtain the following data and conclusion: the ice point is-30.9 ℃, the boiling point is 103.8 ℃, the pH value is 7.7, the appearance is free of precipitates and suspended matters, the product is clear, transparent and light blue, and has no pungent smell, and the product quality meets the requirements of NB/T34073-2018.
Example 4
To the propylene glycol type solar low-temperature heat utilization working medium production process and system related to the utility model, the operation process of the embodiment 4 is the same as that of the embodiment 1. Example 4 differs from example 1 in that:
according to the order requirement, 150 tons of propylene glycol solar low-temperature heat utilization working medium with the freezing point not higher than-35 ℃ and red apparent color is produced. Firstly, determining the mass ratio of each component in the working medium as follows: 48.5 percent of propylene glycol and 48.5 percent of deionized water; the mass ratio of the additive is as follows: 0.7 percent of sebacic acid, 0.7 percent of disodium hydrogen phosphate, 0.4 percent of sodium nitrate, 0.3 percent of sodium benzoate, 0.2 percent of benzotriazole and 0.6 percent of potassium hydroxide; pigment (carmine) 0.1%. Secondly, feeding propylene glycol and deionized water in the same proportion, adding sebacic acid, disodium hydrogen phosphate and potassium hydroxide when the feeding amount of the propylene glycol is 42% of the calculated value, then adding sodium nitrate, sodium benzoate and benzotriazole, and finally adding pigment carmine.
The propylene glycol type solar low-temperature heat utilization working medium product produced at this time is subjected to chemical analysis to obtain the following data and conclusion: the ice point is-36.1 ℃, the boiling point is 104.2 ℃, the pH value is 7.7, the appearance is free of precipitates and suspended matters, the product is clear, transparent and pink, and has no pungent smell, and the product quality meets the requirements of NB/T34073-2018.
Comparative example
The production process of the heat exchange medium for the conventional solar water heater is a reaction kettle type mixed intermittent production process, and comprises the following specific operation steps:
(1) pumping 550kg of propylene glycol into a first reaction kettle, starting the first reaction kettle to stir, then adding 4kg of benzotriazole, 1kg of dry polymaleic acid, 1kg of alginic acid and 0.5kg of simethicone, and stirring for 30 minutes to completely dissolve various additives;
(2) 439kg of deionized water is pumped into a second reaction kettle, the second reaction kettle is started for stirring, then 3kg of borax and 2kg of sodium benzoate are added, stirring is carried out for 30 minutes to completely dissolve various additives, the mixed solution in the first reaction kettle and the second reaction kettle is pumped into a third reaction kettle, the third reaction kettle is started for stirring, 0.1kg of sodium hydroxide is added, the pH value is adjusted to 8.8, 0.2kg of brilliant blue dye is added, stirring is continued for 30 minutes to finally form a blue transparent solution, and sub-packaging can be carried out after the blue transparent solution is inspected to be qualified and filtered through a filter of 0.5-1 um.
The utility model discloses compare with the comparative example, the utility model discloses a system investment is few, and equipment investment such as its feeding pipeline, feeding flow control valve, feeding flowmeter, dredging pipe ware is within 100 ten thousand yuan, the utility model discloses an annual output can reach 10 ten thousand tons, in addition, the utility model discloses because whole use pipeline, no material pouring process, consequently there is not the material pouring loss.
The batch production process of the reaction kettle of the comparative example at least needs 3 reaction kettles, 3 stirrers, 3 material transfer pumps, corresponding feeding pipelines, valves, electrical equipment and the like, the equipment investment is more than 200 ten thousand yuan, the annual output is less than 5 ten thousand tons, and the batch production process of the reaction kettles used in the comparative example needs material pouring, and the material pouring loss rate is about 1%.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a production system of propylene glycol type solar energy low temperature heat utilization working medium which characterized in that: including propylene glycol charge-in pipeline, deionized water charge-in pipeline, additive charge-in pipeline and pigment charge-in pipeline, the additive charge-in pipeline includes an additive inlet pipe main road and a plurality of additive inlet pipe branch roads, and a plurality of additive inlet pipe branch roads all communicate with additive inlet pipe main road, pigment charge-in pipeline includes a pigment inlet pipe main road and a plurality of pigment inlet pipe branch roads, and a plurality of pigment inlet pipe branch roads all communicate with pigment inlet pipe main road, and propylene glycol charge-in pipeline, deionized water charge-in pipeline, additive inlet pipe main road and pigment inlet pipe main road all communicate with the mixing line, are equipped with the pig in the mixing line, and the mixing line communicates with the entry of working medium product jar.
2. The production system of the propylene glycol type solar low-temperature heat utilization working medium according to claim 1, characterized in that: the additive feeding pipe branch comprises a sebacic acid feeding pipe branch, a disodium hydrogen phosphate feeding pipe branch, a sodium nitrate feeding pipe branch, a sodium benzoate feeding pipe branch, a benzotriazole feeding pipe branch and a potassium hydroxide feeding pipe branch; the pigment feeding pipe branch comprises a lemon yellow feeding pipe branch, a weak acid green feeding pipe branch and a weak acid blue feeding pipe branch.
3. The production system of the propylene glycol type solar low-temperature heat utilization working medium according to claim 1, characterized in that: the propylene glycol feeding pipeline is communicated with the starting point of the pipe cleaner, the deionized water pipeline, the additive feeding pipe main pipeline and the pigment feeding pipe main pipeline are communicated with the middle point of the pipe cleaner, and the inlet of the working medium product tank is communicated with the end point of the pipe cleaner.
4. The production system of the propylene glycol type solar low-temperature heat utilization working medium according to claim 1, characterized in that: and the propylene glycol feeding pipeline, the deionized water feeding pipeline, the pigment feeding pipe branch and the additive feeding pipe branch are respectively provided with a feeding flow meter, a feeding flow regulating valve and a feeding automatic switch valve.
5. The production system of the propylene glycol type solar low-temperature heat utilization working medium according to claim 4, characterized in that: the material of feeding flowmeter, feeding flow control valve, feeding automatic switch valve and feeding pipeline is stainless steel material.
6. The production system of the propylene glycol type solar low-temperature heat utilization working medium according to claim 4, characterized in that: the feed flowmeter is a high-precision flowmeter.
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