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A kind of paraffin-containing fuel and preparation method thereof

A technology of paraffin fuel and solid paraffin, which is applied in offensive equipment, explosives processing equipment, non-explosive filler/gelling agent/thickening agent, etc., can solve the problems of poor compatibility, stratification, low success rate of fuel preparation, etc. Achieve the effect of increasing convective heat transfer and radiation heat transfer, simple preparation process, and improving the rate of combustion surface retreat

Inactive Publication Date: 2021-12-28
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if it is necessary to further increase the energy of paraffin-containing fuels, energetic binders can be used. Considering the cost of fuels, polyazide glycidyl ethers can be used as binders, but hydroxyl-terminated polybutadiene binders and poly Azidoglycidyl ether binders are polar substances with hydroxyl groups as functional groups, while paraffin is a mixture of alkanes and non-polar substances. The compatibility of these two binders with paraffin wax is poor. Separation tends to occur during the mixing and curing of the slurry, resulting in lower fuel preparation success rates

Method used

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  • A kind of paraffin-containing fuel and preparation method thereof

Examples

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Effect test

example 1

[0070] Weigh 100g of high-density polyethylene into a flask, put the flask into an oil bath and heat to 150°C, and stir at a speed of 80r / min to accelerate the melting of the high-density polyethylene. After the high-density polyethylene is completely molten, add 4g of stearyl alcohol and 5g of boric acid and stir for 0.5 hours, then pass ozone into the beaker at a flow rate of 5L / min and continue stirring for 5 hours. During this process, the temperature in the flask is kept at 150°C , the stirring speed is 80r / min. After 5 hours, slowly drop the modified polyethylene mixture in the flask into hot water at 80°C and stir vigorously at a stirring speed of 150r / min, then filter out the flaky modified polyethylene floating in the hot water and dry it , to obtain modified polyethylene.

[0071] Weigh 58 # Put 645g of semi-refined solid paraffin and 20g of modified polyethylene into the reactor, set the temperature in the reactor to 120°C, and the speed to 80r / min, stir for 1 hou...

example 2

[0073] Weigh 100g of high-density polyethylene into a flask, put the flask into an oil bath and heat to 150°C, and stir at a speed of 80r / min to accelerate the melting of the high-density polyethylene. After the high-density polyethylene is completely molten, add 4g of stearyl alcohol and 5g of boric acid and stir for 0.5 hours, then pass ozone into the beaker at a flow rate of 5L / min and continue stirring for 5 hours. During this process, the temperature in the flask is kept at 150°C , the stirring speed is 80r / min. After 5 hours, slowly drop the modified polyethylene mixture in the flask into hot water at 80°C and stir vigorously at a stirring speed of 150r / min, then filter out the flaky modified polyethylene floating in the hot water and dry it , to obtain modified polyethylene.

[0074] Weigh 58 # Put 620g of semi-refined solid paraffin and 20g of modified polyethylene into the reactor, set the temperature in the reactor to 120°C, and set the rotation speed to 80r / min. A...

example 3

[0076] Weigh 100g of low-density polyethylene into a flask, put the flask into an oil bath and heat to 130°C, and stir at a speed of 80r / min to accelerate the melting of the low-density polyethylene. Add 4g stearyl alcohol and 5g boric acid and stir for 0.5 hours after the low-density polyethylene is completely melted, then pass ozone into the beaker at a flow rate of 5L / min and continue stirring for 5 hours. During this process, the temperature in the flask is kept at 130°C , the stirring speed is 80r / min. After 5 hours, slowly drop the modified polyethylene mixture in the flask into hot water at 80°C and stir vigorously at a stirring speed of 150r / min, then filter out the flaky modified polyethylene floating in the hot water and dry it , to obtain modified polyethylene.

[0077] Weigh 58 # Put 645g of semi-refined solid paraffin and 20g of modified polyethylene into the reactor, set the temperature in the reactor to 120°C, and the speed to 80r / min, stir for 1 hour, add 80g...

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Abstract

The invention discloses a paraffin-containing fuel formula and a preparation method; by preparing modified polyethylene, the viscosity of the paraffin is improved by blending the modified polyethylene and solid paraffin, and the paraffin and the binder are uniformly mixed; The binder can obtain paraffin-containing fuels with different energy properties; the compatibility of solid paraffin and the binder can be improved and the paraffin-containing fuels with higher mechanical properties can be obtained. Adding modified polyethylene to paraffin-containing fuel can improve the extensibility and viscosity of solid paraffin and the mechanical properties of paraffin; it can ensure the integrity of the grain of paraffin-containing fuel under the condition of transportation, storage and overload in solid-liquid hybrid engines. Adding aluminum powder to paraffin-containing fuel can increase the density specific impulse of paraffin-containing fuel, which is beneficial to increase the convective heat transfer and radiation heat transfer to the burning surface during the combustion process, and increase the retreat rate of the burning surface; preparation of modified polyethylene The process is simple, and the paraffin and the binder are evenly mixed to obtain the paraffin-containing fuel with better mechanical properties.

Description

technical field [0001] The invention relates to the preparation technology of a solid fuel propellant for an aerospace engine, in particular to a paraffin-containing fuel formula and a preparation method. Background technique [0002] The solid-liquid hybrid engine has the characteristics of high safety and reliability, can be started multiple times, and can be turned on and off and thrust adjusted multiple times at a low cost. However, the traditional fuel represented by hydroxyl-terminated polybutadiene has the defect of low combustion surface retreat rate; in order to meet the thrust requirements of the engine, it is often necessary to increase the combustion surface by designing complex drug types, but the use of complex drug types It will also reduce the packing density of the fuel and cause the unfavorable situation that the grain processing is difficult. In the late 1990s, Stanford University developed a solid fuel with industrial paraffin as its main component. 3 t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B33/02C06B23/00C06B21/00C06D5/00
CPCC06B33/02C06B23/001C06B21/0058C06D5/00
Inventor 刘林林何翔胡松启
Owner NORTHWESTERN POLYTECHNICAL UNIV
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