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Composite explosive aqueous suspension coated pelletizing solvent recovery process

A solvent and granulation technology, which is applied in the direction of coating particles, granulating raw materials, steam condensation, etc., can solve the problems of waste of resources, waste water treatment pressure, recovery of solvents without purification disposal, failure to meet the requirements of reuse, etc. Achieve the effects of reducing water treatment pressure, improving solvent purity, and reducing waste

Inactive Publication Date: 2019-04-05
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, the existing solvent treatment process for manufacturing coated granulation mixed explosives by the water suspension method has the following deficiencies: (1) The solvent recovery efficiency is low, resulting in resource waste and waste water treatment pressure; (2) There is no purification treatment for the recovered solvent, The recovery purity is low, far below the recycling requirements

Method used

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  • Composite explosive aqueous suspension coated pelletizing solvent recovery process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) In the stage of water suspension coating granulation and vacuum distillation, the granulation kettle 1 circulation hot water unit and the winding tube condenser 2, 3 circulation chiller units are opened in advance, and the condenser is pre-cooled to 8°C. In the process of gradually heating up, open the vacuum port valve of the secondary solvent receiving tank 5, and the solvent vapor will basically realize complete condensation after passing through the primary and secondary winding tube condensers 2 and 3 and the primary and secondary solvent receiving tanks 4 and 5 in sequence. The final aqueous solvent is received into the primary and secondary solvent receiving tanks.

[0025] (2) Dehydration and purification of the solvent obtained by condensation: first, the solvent recovered by the solvent receiving tanks 4 and 5 is allowed to stand still for a period of time to form obvious layers, and the liquid outlet bypass valve at the bottom of the primary and secondary ...

Embodiment 2

[0028] (1) In the stage of water suspension coating granulation and vacuum distillation, the granulation kettle 1 circulation hot water unit and the winding tube condenser 2, 3 circulation chiller units are opened in advance, and the condenser is pre-cooled to 5°C. In the process of gradually heating up, open the vacuum port valve of the secondary solvent receiving tank 5, and the solvent vapor will basically realize complete condensation after passing through the primary and secondary winding tube condensers 2 and 3 and the primary and secondary solvent receiving tanks 4 and 5 in sequence. The final aqueous solvent is received into the primary and secondary solvent receiving tanks.

[0029] (2) Dehydration and purification of the solvent obtained by condensation: first, the solvent recovered by the solvent receiving tanks 4 and 5 is allowed to stand still for a period of time to form obvious layers, and the liquid outlet bypass valve at the bottom of the primary and secondary ...

Embodiment 3

[0032] (1) In the stage of water suspension coating granulation and vacuum distillation, the granulation kettle 1 circulation hot water unit and the winding tube condenser 2, 3 circulation chiller units are opened in advance, and the condenser is pre-cooled to 3°C. In the process of gradually heating up, open the vacuum port valve of the secondary solvent receiving tank 5, and the solvent vapor will basically realize complete condensation after passing through the primary and secondary winding tube condensers 2 and 3 and the primary and secondary solvent receiving tanks 4 and 5 in sequence. The final aqueous solvent is received into the primary and secondary solvent receiving tanks.

[0033](2) Dehydration and purification of the solvent obtained by condensation: first, the solvent recovered by the solvent receiving tanks 4 and 5 is allowed to stand still for a period of time to form obvious layers, and the liquid outlet bypass valve at the bottom of the primary and secondary s...

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Abstract

The invention relates to a solvent recovery process, is applied to a composite explosive aqueous suspension coated pelletizing production process and belongs to the technical field of explosive and powder processes. According to the solvent recovery process, reduced pressure distillation is matched with a double-stage condensing process, and condensing devices are all winding pipe type heat exchangers; a two-stage condenser achieves sufficient condensation of organic solvent vapor; a cooler unit supplies cooling capacity required by a condensing process, and solvent recycled through a receiving tank is dewatered and purified by a molecular sieve dewatering device to meet the indexes on recycling purity. The solvent recovery process has the advantages of being simple in process, high in solvent recovery rate and purity with conformation to recycling standards, and is particularly applicable to solvent treatment processes of the composite explosive aqueous suspension coated pelletizing process.

Description

technical field [0001] The invention belongs to the technical field of propellant and explosive technology, and relates to a solvent recovery process in the production process of mixed explosive water suspension coating granulation. Background technique [0002] The process of manufacturing coated granulated mixed explosives by the water suspension method is to dissolve the binder such as polymer in an appropriate solvent, and then mix the main explosive and water to form a suspension. Slowly add the prepared adhesive organic solution into the main explosive suspension at a certain temperature, and form an adhesive slurry by stirring. Evaporate the solvent by raising the temperature, filter, wash, dry, screen, and finally get the product. The most commonly used solvents for dissolving polymer adhesives in this process are ethyl acetate and petroleum ether. [0003] The domestic water suspension method to manufacture coated granulated mixed explosives uses vacuum distillati...

Claims

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Application Information

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IPC IPC(8): B01J2/00B01D5/00
CPCB01D5/0036B01J2/006
Inventor 罗志龙邹高兴康超苏杨陈基范鑫辰陈松雷全虎
Owner XIAN MODERN CHEM RES INST