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Production process and system of propylene glycol type solar low-temperature heat utilization working medium

A production system, propylene glycol technology, applied in the direction of heat exchange materials, mixers, mixer accessories, etc., can solve the problems of unfavorable large-scale batch production, unfavorable product popularization and promotion, increase of production costs, etc., to avoid mechanical damage Risk, production process safety, and low investment costs

Pending Publication Date: 2021-05-11
CHINA TIANCHEN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat exchange medium of the solar water heater produced by this method enhances the corrosion inhibition effect of the metal and prolongs the service life, but this production process adopts the intermittent production mode of physical mixing in the reactor, and the production efficiency is low, which is not conducive to large-scale batch production
Further, the price of synthetic organic carboxylic acids such as polymaleic anhydride and alginic acid is higher, which increases the production cost
In addition, additives such as borax are harmful to the human body and are not intrinsically safe heat transfer fluids, which is even more detrimental to the popularization and promotion of products

Method used

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  • Production process and system of propylene glycol type solar low-temperature heat utilization working medium
  • Production process and system of propylene glycol type solar low-temperature heat utilization working medium
  • Production process and system of propylene glycol type solar low-temperature heat utilization working medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] According to the order requirements, 50 tons of propylene glycol-type solar low-temperature heat utilization working fluid with a freezing point not higher than -20°C and an apparent color of yellow will be produced. First, determine the mass ratio of each component in the working fluid: propylene glycol 43%, deionized water 54%; the mass ratio of additives is: sebacic acid 0.5%, disodium hydrogen phosphate 0.8%, sodium nitrate 0.2%, benzene Sodium formate 0.4%, benzotriazole 0.4%, potassium hydroxide 0.6%; pigment (lemon yellow) 0.1%. Second, propylene glycol and deionized water are fed in the same proportion, and when the propylene glycol feed rate is 35% of the calculated value, add sebacic acid, disodium hydrogen phosphate, potassium hydroxide, then add sodium nitrate, sodium benzoate, benzotri Azole, and finally the coloring tartrazine. Third, when the addition of propylene glycol and deionized water reaches 90% of the calculated value, the control system will aut...

Embodiment 2

[0052] For a propylene glycol-type solar energy low-temperature heat utilization working medium production process and system involved in the present invention, the operation process of embodiment 2 is the same as that of embodiment 1. The difference between embodiment 2 and embodiment 1 is:

[0053] Producing 80 tons of propylene glycol-based solar low-temperature heat utilization working fluid with a freezing point not higher than -25°C and an apparent color of green according to the order requirements. First, determine the mass ratio of each component in the working fluid: propylene glycol 44.8%, deionized water 52.2%; the mass ratio of additives is: sebacic acid 0.7%, disodium hydrogen phosphate 0.7%, sodium nitrate 0.4%, benzene Sodium formate 0.3%, benzotriazole 0.2%, potassium hydroxide 0.6%; pigment (weak acid green) 0.1%. The second, propylene glycol and deionized water are fed in the same proportion first, and when the propylene glycol feed rate is 38% of the calcul...

Embodiment 3

[0056] For a propylene glycol-type solar energy low-temperature heat utilization working medium production process and system involved in the present invention, the operation process of embodiment 3 is the same as that of embodiment 1. The difference between embodiment 3 and embodiment 1 is:

[0057] Producing 100 tons of propylene glycol-based solar low-temperature heat utilization working fluid with a freezing point not higher than -30°C and an apparent color of blue according to the order requirements. First, determine the mass ratio of each component in the working fluid: propylene glycol 46.3%, deionized water 50.7%; the mass ratio of additives is: sebacic acid 0.7%, disodium hydrogen phosphate 0.7%, sodium nitrate 0.4%, benzene Sodium formate 0.3%, benzotriazole 0.2%, potassium hydroxide 0.6%; pigment (weak acid blue) 0.1%. The second, propylene glycol and deionized water are fed in the same proportion first, and when the propylene glycol feed rate is 40% of the calcula...

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Abstract

The invention provides a production process and system of a propylene glycol type solar low-temperature heat utilization working medium. The working medium comprises the following components in percentage by mass: 40 to 50% of propylene glycol; 47 to 57% of deionized water; 2.2 to 3.6 percent of an additive; and 0.1 to 0.2 percent of pigment. The mass percent of each component is calculated according to the performance requirement of the solar low-temperature heat utilization working medium and the working medium yield, the adding time and sequence of each additive, pigment, propylene glycol and deionized water are determined, and the adding flow of each additive, pigment, propylene glycol and deionized water is determined. According to the production process and system of the propylene glycol type solar low-temperature heat utilization working medium, only common chemical equipment such as a pipeline, a valve, a flow meter and a pipe cleaner is used, continuous production can be achieved, special materials and imported equipment are not needed, the system is simple, and the investment cost is low.

Description

technical field [0001] The invention belongs to the technical field of chemical process, and in particular relates to a production process and system of a propylene glycol type solar energy low-temperature heat utilization working medium. Background technique [0002] Solar thermal utilization is an important field of renewable resource utilization. At present, the most mature product in the global low-temperature solar thermal utilization is solar water heaters. my country's solar water heater industry has formed a supporting industrial chain of mechanical equipment, raw material processing, marketing, installation services, etc., and many well-known brand companies have emerged. [0003] Compared with vacuum tube solar water heaters, flat panel solar water heaters have the advantages of good safety, easy integration with buildings, and strong pressure resistance. In urban residential users and engineering applications, it is suitable for pressure-bearing systems. more obv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F15/04B01F13/04C09K5/10B01F35/60
CPCC09K5/10B01F35/605B01F35/833B01F35/883
Inventor 程庆来柴永峰贾利凯李碧柳李城序
Owner CHINA TIANCHEN ENG