SU777338A1 - Additive for reducing hydrodynamic resistance of cooling agent - Google Patents

Description

one

The invention relates to the field of heat carrier transport through pipelines in closed systems and can be used mainly in boiler installations in which water circulates as heat carrier.

Additives are known to reduce the hydrodynamic resistance of a heat transfer fluid, which are high molecular weight substances, in particular polyethylene oxide I.

However, these additives are subjected to irreversible mechanical degradation, as a result of which the hydrodynamic resistance of the coolant decreases for a short time. To preserve the properties of the coolant in a closed loop, continuous addition of high molecular weight additives is required.

The aim of the invention is to increase the efficiency of reducing the hydrodynamic resistance of the coolant while simplifying the process, as well as protecting the pipelines of closed systems from corrosion damage:

This goal is achieved by the fact that as an additive to reduce the hydrodynamic resistance of a heat carrier,

| p-N-methyl-M-olenoyl sodium ethyl sulfonate

ABOUT

II 5 С8Н ,, (СН2) 7-С-N-СгН45ОзЫа

I SNS

with electrolytes NaCl and NagCOa.

10 This additive is currently used in industry as an active detergent base. When used in a circulation loop, friction losses are reduced, which gives

15 it is possible to reduce energy costs for the circulation of the heat transfer fluid, or to increase the flow rate of the heat transfer fluid at the same energy cost.

The invention is tested in industrial

20 conditions on the boiler plant. As an additive, an aqueous solution of p-N-methyl-N-olenoyl sodium ethyl sulfonate was tested in the presence of electrolytes (NaCl, NagCOs) as a heat carrier having

25 anti-corrosion properties and reduced resistance compared to water.

The determination of the decrease in pressure loss was determined by the expression

WQ%} q-coasi,

lA

where PI is the pressure loss in hydrocontour

on the water; PZ - circulation pressure loss

the tested coolant; q - consumption.

Determination of the inhibiting properties was carried out using the practical method of reducing the weight of an individual plate after seven days immersion in the heat transfer medium under test. The calculations were carried out by the formulas:

ui "2

V

S-f

where GI and a2 is the weight of the plate before and after immersion (grams);

plate area (cm); dive time (hour). ,

100%,

ZV

Z is the percentage of protection of the metal from corrosion of corrosion;

VHVi - corrosion rate in water and heat carrier under test. The research results are summarized in table 1 and 2.

The dependence of the decrease in pressure loss on the temperature during the circulation of the test coolant (NaCl - 4.3%, NaaCOa - 3.5%, .-. M-methyl-M-olenoyl sodium ethyl sulfonate - 0.25%) at a constant flow rate.

T a b l II c a 1

Effect of coolant on metal corrosion

T a b l II c a 2

Claims (1)

SUMMARY OF THE INVENTION ²⁵ Use of Sodium ^ - [S-methyl-I-olenoyl] Ethyl Sulfonate ABOUT II ₃₀ C _s H ₁₇ -CH = CH (CH _a ) ₇ -C —N — C ₂ H ₄ SO ₃ Na CH ₃ with electrolytes NaCl and Na ₂ CO ₃ as an additive to reduce the hydrodynamic 35 resistance of the coolant.