Method of high-officieny treating spacecraft impelling agent of spacecraft and its special eequipment

A special equipment and propellant technology, applied in the field of efficient treatment of aerospace propellant wastewater, can solve problems such as unsatisfactory effect and low treatment efficiency, and achieve the effects of low cost, high waste degradation rate and low energy consumption

Inactive Publication Date: 2004-10-20
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, a variety of methods for treating propellant wastewater have been reported in my country. For example, Fan Bingan et al. used photocatalysis to degrade unsymmetrical dimethylhydrazine in water (Document 3: Fan Bingan, Jia Ying, Xu Guogen, Loaded TiO2 stationary phase photocatalysis Degradation of unsymmetrical dimethylhydrazine in water, Shanghai Environmental Science, 2000 (5): 12-15), but found that after 2 hours of light, the degradation rate of unsymmetrical dimethylhydrazine only reached 65%, and Wang Bin et al. used TiO 2- Cu 2+ system for the degradation of unsymmetrical dimethylhydrazine (Document 4: Wang Bin, Yang Ping. TiO2-Cu2+ system degradation of unsymmetrical dimethylhydrazine. Yunnan Environmental Science

Method used

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  • Method of high-officieny treating spacecraft impelling agent of spacecraft and its special eequipment
  • Method of high-officieny treating spacecraft impelling agent of spacecraft and its special eequipment
  • Method of high-officieny treating spacecraft impelling agent of spacecraft and its special eequipment

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Comparison scheme
Effect test

Embodiment 1

[0028] The inventive method: as figure 1 , 2 As shown, the propellant wastewater whose content of unsymmetrical dimethylhydrazine has been preliminarily determined is injected into the wastewater storage tank 3, and at the same time, deionized water is injected into the clean water storage tank 2. By adjusting the propellant wastewater inlet of the high-pressure metering pump 4 and the flow rate of the deionized water for dilution, the bias in the wastewater to be treated in the wastewater preheater made of the heat recovery cylinder 5 and the preheating furnace 6 can be made from its outlet. The concentration of dimethylhydrazine is kept in the range of 2g / L~10g / L. The content of unsymmetrical dimethylhydrazine in the propellant waste water adopted in this embodiment is 3g / L, therefore does not need to be diluted, directly pressurizes to 28.0±0.1×10 with the flow rate of 24L / h by the high-pressure metering pump 4. 6 After Pa, it is sent to the waste water preheater for preh...

Embodiment 2

[0047] The difference with Example 1 is: the product after the treatment——CO 2 , N 2 and H 2 After O etc. are discharged from the outlet of the autoclave 11, they can also directly enter the cooler 15 for cooling. After cooling, the effluent product with a temperature of 30±5°C is released to normal pressure through the pressure relief valve, and then passes through the gas-liquid separator 16 for further decompression. Gas and liquid separation. Such as Image 6 As shown, the output port of the autoclave 11 of the equipment of the present invention can be directly connected to the cooler 15; the output port of the waste water preheater formed by the preheating furnace can be directly connected to the input port of the autoclave 11.

[0048] The unsymmetrical dimethylhydrazine content is 15g / L in the propellant waste water that adopts in the present embodiment, therefore needs to dilute, by regulating the flow rate of the propellant waste water entrance of high-pressure met...

Embodiment 3

[0051] The difference from Example 1 is:

[0052] The propellant wastewater flow rate provided by the high-pressure metering pump 4 to the pipeline used in this embodiment is 40 L / h, and the wastewater stream gradually flows from the bottom of the autoclave 11 to the top outlet in about 65 seconds. The organic pollutants contained in it can be oxidized and decomposed, and the decomposition rate reaches 90%.

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Abstract

A process for effectively treating the sewage containing the propellant of spacercraft includes such steps as using high-pressure metering pump to raise the pressure of said sewage to 28-30 MPa, preheating it to 350-370 deg.c, mixing it with O2 under 28-30 MPa in a high-pressure reactor, quickly heating the mixture to 500-550 deg.C and decomposing reaction for 95 seconds to decompose the toxic C2N2H8 by more than 99.99%. Its advantages are high efficiency and effect, less energy consumption and low cost.

Description

technical field [0001] The invention relates to environmental protection waste treatment technology, in particular to a method and special equipment for efficiently treating spaceflight propellant waste water. Background technique [0002] With the large-scale development of aviation and aerospace, the output of propellant fuel used in aerospace engine systems is increasing day by day. At present, most of the propellant fuel used in countries around the world is N 2 o 4 / Hydrazines (unsymmetrical dimethylhydrazine, monomethylhydrazine, hydrazine, etc.), such as the US Hercules 2 missile (using N 2 o 4 / unsymmetrical dimethylhydrazine 144 tons), my country's Long March series of launch vehicles (boosters and first and second stages use N 2 o 4 / unsymmetrical dimethylhydrazine 444 tons) and so on (document 1: Vigorous Chinese Long March series launch vehicles, Space Express, 2000: 29-30), although this liquid propellant has good specific impulse performance and spontane...

Claims

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Application Information

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IPC IPC(8): C02F1/72
Inventor 张丽关辉张召恩韩恩厚柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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