Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Modularized smokeless firework propellant and preparation method thereof

A modular and propellant technology, which is applied in the direction of nitration explosive components, explosives, offensive equipment, etc., can solve the problem that particles are easy to adhere to the inner and outer walls of the launch tube, powder particles are easy to fly to the outside of the launch tube, and the discharge process is safe and secure. Unfavorable environmental protection and other issues, to achieve the effect of simplifying the charge process, facilitating automation and standardization, and improving the consistency of charge ignition

Active Publication Date: 2011-10-19
NANJING UNIV OF SCI & TECH
View PDF5 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main difference between this kind of propellant and black powder is that its bulk density is low, and it is easy to generate static electricity. The particles are easy to adhere to the inner and outer walls of the launch tube, which brings some difficulties to the charge. Flying to the outside of the launch tube, these problems have brought safety hazards in the production process of fireworks charges
[0004] In addition, when the charging conditions of granular propellants are not suitable, there will be a problem that the particles will remain during the discharge process, which is unfavorable to the safety and environmental protection of the discharge process.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modularized smokeless firework propellant and preparation method thereof
  • Modularized smokeless firework propellant and preparation method thereof
  • Modularized smokeless firework propellant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] A method for preparing a modular smokeless fireworks propellant, which is to mix an organic binder with a granular micropore firework medicine, and then prepare the mixed material into a block solid by molding, and then use a drying method Drive off volatile components in bulk solids. Specifically include the following steps:

[0020] Step 1. Preparation of granular micro-pore fireworks medicine; dissolving, emulsifying and foaming the pre-prepared raw materials containing nitrocellulose, and forming into balls, followed by solvent removal, material separation, and finally drying to obtain granular micro-pores Fireworks medicine; when the material is dissolved and emulsified and foamed, an aqueous solution of an ignition performance enhancer is added; during the ball forming process, an aqueous solution containing an ignition performance enhancer and a dispersant is added as a dispersion medium; the ignition performance enhancement used in the above two processes The a...

Embodiment 1

[0034]Granular microporous fireworks were prepared from single-base waste propellant powder containing 97.0% nitrocellulose and 1.0% diphenylamine (stabilizer). The single-base waste gunpowder is preliminarily crushed, and the diameter of the particles is controlled to be no more than 3mm. The wet powder with water is added to the molding equipment, and ethyl acetate solvent 10 times the mass of the powder is added under stirring, and the temperature is 45°C-50°C Stir and dissolve under temperature for 30-60min, then continuously add the aqueous solution of 0.5% potassium nitrate (as ignition performance enhancer) to the system; Aqueous solution, the amount of potassium nitrate aqueous solution added is 6 times the mass of the drug granules, then continue to stir at a temperature of 50-60°C for 30min to 60min, and when the temperature of the system is adjusted to 65°C-68°C, add 6 times the mass of the raw drug The aqueous solution containing dispersant and 0.5% potassium nitra...

Embodiment 2

[0040] Granular micro-pore fireworks were prepared from raw materials with nitrocellulose content of 99% and diphenylamine (stabilizer) content of 0.5%. Add ethyl acetate solvent 10 times the mass of the pellets under stirring, stir and dissolve at 45°C-50°C for 30-60min, then continuously add 0.5% potassium nitrate aqueous solution to the system, potassium nitrate as ignition performance Strengthening agent: carry out emulsification and foaming operation under agitation, continue to add 0.5% potassium nitrate aqueous solution in this step, the amount of potassium nitrate aqueous solution added is 6 times of the mass of the medicine grain, and then continue at a temperature of 50-60°C Stir for 30min to 60min, when the temperature of the system is adjusted to 65°C-68°C, add an aqueous solution containing dispersant and 0.5% potassium nitrate 6 times the mass of the raw material drug into the system to disperse into balls, gelatin is used as the dispersant, and the dispersant Th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
particle diameteraaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a modularized smokeless firework propellant which contains nitrocotton, a large quantity of tiny holes are arranged in the propellant and have block shape, and the size and shape of the holes are determined according to the caliber and shape of a firework transmitting barrel. The preparation method of the modularized smokeless firework propellant comprises the following steps: firstly mixing organic bond with granular pore firework powder, secondly preparing block-shaped solid by using the mixed materials through mould pressing, and then expelling volatilizing components in the block-shaped medicine by stoving. Compared with the granular pore firework powder, the modularized smokeless firework propellant can thoroughly solve the problem of propellant residue of granular propellant feeding, and simplifies the operation of transmitting propellant feeding, so that the stability and consistency of an end firework product are better; and in addition, the modularizedsmokeless firework propellant also avoids the mechanical friction action among granules, and improves the safety of manufacture, transmission, and storage of the firework products.

Description

technical field [0001] The invention belongs to the fireworks propellant technology, in particular to a modular smokeless fireworks propellant and a preparation method thereof. Background technique [0002] Black powder is a traditional firework propellant that has been used for hundreds of years. Due to the large amount of smoke and polluting gases produced during the fireworks display process, research on environmentally friendly fireworks with less smoke has received attention in recent years. It is mainly developed in China. The current smokeless or micro-smoke propellants include powdered medicines prepared by pulverizing decommissioned single-base medicines and smokeless propellants with microporous structures obtained through spheroidization processes. Among them, the apparent burning rate of single base powder is quite different from that of black powder, and it is only used in some fireworks varieties that require lower burning speed. The smokeless propellant with ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C06B25/20
Inventor 蔺向阳潘仁明李生有
Owner NANJING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com