CN105999981A - Method for condensing and recovering dinitrogen tetroxide exhaust gas - Google Patents
Method for condensing and recovering dinitrogen tetroxide exhaust gas Download PDFInfo
- Publication number
- CN105999981A CN105999981A CN201610530537.8A CN201610530537A CN105999981A CN 105999981 A CN105999981 A CN 105999981A CN 201610530537 A CN201610530537 A CN 201610530537A CN 105999981 A CN105999981 A CN 105999981A
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- Prior art keywords
- dinitrogen tetroxide
- waste gas
- exhaust gas
- dinitrogen
- tetroxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a method for condensing and recovering dinitrogen tetroxide exhaust gas. The method comprises the main technological process that the characteristics of high saturated vapor pressure of dinitrogen tetroxide, small freezing point and boiling point temperature range (a boiling point is 21.15 DEG C and a freezing point is 11.23 DEG C) are utilized, cooling energy is provided under the situation that exhaust gas compression is not performed by using a low-temperature water chilling unit, the produced cold energy is transferred to an ethylene glycol-water solution, and then the ethylene glycol-water solution transfers the cooling energy to the dinitrogen tetroxide exhaust gas to reduce the temperature of the exhaust gas, so that the dinitrogen tetroxide in the exhaust gas reaches a saturated state and dinitrogen tetroxide condensation and recovery are achieved. The exhaust gas flow treated by adopting the method is up to 300 m<3>/h, the recovery rate is 80% or above, the purity of the recovered dinitrogen tetroxide is above 99.8%, and equivalently the water content is below 0.03%. The method is simple in technological process and high in benefit and meanwhile can serve as a process method for producing a small amount of high-purity dinitrogen tetroxide.
Description
Technical field
The present invention relates to liquid propellant exhaust-gas treatment field, particularly relate to a kind of method reclaimed for dinitrogen tetroxide waste gas condensation, the through engineering approaches belonging to waste gas recovery processes application.
Technical background
Dinitrogen tetroxide severe toxicity, and be corrosive, under atmospheric pressure, the boiling point of dinitrogen tetroxide is 21.2 DEG C, fusing point-11.2 DEG C, density (20 DEG C) 1.446g/cm3, it is a kind of excellent oxidant, its liquid temperature narrow range, easily solidify and evaporate.Dinitrogen tetroxide saturated vapor pressure under room temperature is higher.In saturated vapor, dinitrogen tetroxide and nitrogen dioxide form balance mixed gas, mutually convert.Nitrogen dioxide gas is brownish red, has nerve anesthesia toxicity, belongs to moderate toxicity material.Dinitrogen tetroxide is one of most important propellant, is widely used in space launch and weaponry scientific research and testing field.
In the work process such as tuberculosis, filling, storehouse backflow, homoiothermic, various equipment adjustment, large quantity of exhaust gas will be produced, possible asthenic syndrome and the chronic respiratory inflammation card of going crazy of personnel's Long Term Contact dinitrogen tetroxide waste gas, short-term sucks in a large number can damage respiratory tract, the nitrogen oxides such as the titanium dioxide phenodiazine simultaneously decomposing generation can damage the ozone layer under the effect of ultraviolet consumingly, and destructive power is not less than fluorine alkyl chloride.
For a long time, dinitrogen tetroxide waste gas manifold crosses high altitude discharge, or burning, or the mode such as solution absorption processes, and has both added cost, has caused secondary pollution, has also resulted in bigger energy waste simultaneously.
Summary of the invention
It is an object of the invention to disclose a kind of method reclaimed for dinitrogen tetroxide waste gas condensation, it is easy to dinitrogen tetroxide waste gas in propellant operation carries out condensation recycling, both reduce environmental pollution, improved safety, had useful component in exhaust gas recycling, reduce the wasting of resources.
The present invention is achieved through the following technical solutions:
1, know-why
The designing points of the present invention is saturated vapor pressure height, freezing point and the feature of boiling point temperature range narrow (boiling point 21.15 DEG C, freezing point-11.23 DEG C) utilizing dinitrogen tetroxide, in the case of not carrying out waste gas compression, by using low temperature water chiller to provide cold, the cold energy of generation is passed to Glycol Mixture, Glycol Mixture is transferred to dinitrogen tetroxide waste gas cold again, reduce EGT, make dinitrogen tetroxide in waste gas reach hypersaturated state, thus realize dinitrogen tetroxide condensation and reclaim.
In the present invention, two alcohol-water solution of second are intermediate heat transfer medium, are also cool storage mediums, it is ensured that system even running.
2, technological process
The technological process of the present invention such as accompanying drawing.
Technological process capital equipment: low temperature water chiller, waste gas cooling heat exchanger, ethylene glycol solution circulating pump, ethylene glycol solution surge tank, condensed fluid collecting tank, gas-liquid separator and pneumatic ball valve, electric control valve, thermometer and transmitter thereof, Pressure gauge and transmitter thereof, liquidometer and transmitter thereof, vortex-shedding meter, control system.
Technological process contains the material flow path of three steps, it is achieved cold obtains, heat transmits, condensation is reclaimed.
First step material flow path:
Refrigerant cycle stream, by circulating refrigerant, low temperature water chiller constantly drains into environment system thermal, cold is reached Glycol Mixture.
Second step material flow path:
Glycol Mixture circulation stream, circulation power is provided by circulating pump, Glycol Mixture passes through waste gas cooling heat exchanger, the cold that low temperature water chiller is produced reaches dinitrogen tetroxide waste gas, the heat obtained is reached low temperature water chiller from waste gas simultaneously, and go round and begin again circulation, there is provided cold constantly to dinitrogen tetroxide waste gas, on the one hand Glycol Mixture realizes effective heat transfer, on the other hand realizes certain cold-storage, it is ensured that system even running.
Third step material flow path:
Dinitrogen tetroxide exhaust flow path, dinitrogen tetroxide waste gas enters waste gas cooling heat exchanger and is cooled down, form supersaturated vapor liquid mixture, entering gas-liquid separator and form gas-liquid separation, the waste gas of generation contains a small amount of dinitrogen tetroxide, adopts and discharges after processing in other ways, the liquid produced enters condensed fluid collecting tank, realize again reclaiming, wait and collect a constant volume, go to special storage system.
Advantages of the present invention and beneficial effect:
1, the present invention have studied a kind of method reclaimed for dinitrogen tetroxide waste gas condensation and technological process, the saturated vapor pressure utilizing dinitrogen tetroxide is high, freezing point and the feature of boiling point temperature range narrow (boiling point 21.15 DEG C, freezing point-11.23 DEG C), in the case of not being compressed, use the equipment of current various maturation, reduce dinitrogen tetroxide EGT, make dinitrogen tetroxide in waste gas reach hypersaturated state, thus realize dinitrogen tetroxide condensation and reclaim..
2, present invention achieves major part dinitrogen tetroxide in waste gas to recycle, while reducing physical waste, decrease again environmental pollution.If processing pollution to need to consume the energy, decrease energy-output ratio simultaneously.
3, the present invention reclaims for dinitrogen tetroxide condensation, and treating capacity is big, and high treating effect, efficiency reaches more than 80%, every 100m3In waste gas, recyclable dinitrogen tetroxide is about 105kg, and economic benefit is obvious.
4, safety and the automaticity of the present invention are high, can realize automatically controlling, and have automatic interlock and manual operation to control function, it is ensured that security of system.
5, the present invention is a kind of process producing a small amount of high-purity dinitrogen tetroxide simultaneously, the dinitrogen tetroxide purity after recovery higher than 99.8%(theory purity higher than 99.9%), corresponding water content is less than 0.03%.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
In figure: 1-pneumatic ball valve, 2-thermometer and transmitter, 3-vortex-shedding meter, 4-Pressure gauge and transmitter, 5-Glycol Mixture surge tank, 6-liquidometer and transmitter, 7-electric control valve, 8-low temperature water chiller, 9-ethylene glycol solution circulating pump, 10-waste gas cooling heat exchanger, 11-gas-liquid separator, 12-relief valve, 13-stop valve, 14-condensed fluid collecting tank.
Detailed description of the invention
Below with realize a set of dinitrogen tetroxide exhaust gas entrance temperature be 15 DEG C time, process can be as 300m3Technological process and the device of/h are specifically described.
Device uses skid structure, capital equipment is installed on metab, including low temperature water chiller 8, waste gas cooling heat exchanger 10, Glycol Mixture circulating pump 9, ethylene glycol-water surge tank 5, condensed fluid collecting tank 14, gas-liquid separator 11 and pneumatic ball valve, electric control valve, thermometer and transmitter thereof, Pressure gauge and transmitter device, liquidometer and transmitter thereof, vortex-shedding meter, control system etc..
1, technical specification
(1) exhaust-gas treatment flow: 200～300m3/h；
(2) organic efficiency: >=80%:
(3) the dinitrogen tetroxide purity reclaimed: >=99.8%；Corresponding water content :≤0.03%.
2, the main technologic parameters of processing means such as table 1.
Table 1 main technologic parameters table
| Waste gas cooling heat exchanger Glycol Mixture inlet temperature (DEG C) | -15～-10 |
| Waste gas cooling heat exchanger Glycol Mixture outlet temperature (DEG C) | -10～-5 |
| Exhaust gas entrance temperature (DEG C) | ～15 |
| Waste gas outlet temperature (DEG C) | -10～-5 |
| Waste gas cooling heat exchanger heat exchange power (kW) | ≥80 |
| Freezing unit refrigerating capacity (kW) | 80 |
Claims (2)
1. for a dinitrogen tetroxide waste gas Two-way Cycle condensation recycling method, it is characterized in that: first dinitrogen tetroxide waste gas is sent into waste gas cooling heat exchanger and freezing unit cooling processes, Glycol Mixture is dropped to-25 DEG C～-20 DEG C；Glycol Mixture after cooling enters gas-liquid separator, cold is transferred to dinitrogen tetroxide waste gas by Glycol Mixture, reduce dinitrogen tetroxide EGT, dinitrogen tetroxide waste gas is made to reach hypersaturated state, the waste gas produced after gas-liquid separator processes discharges after after-treatment, and the liquid of generation enters condensed fluid collecting tank and reclaims.
A kind of method reclaimed for dinitrogen tetroxide waste gas condensation, it is characterized in that: the saturated vapor pressure utilizing dinitrogen tetroxide is high, freezing point and the narrow feature of boiling point temperature range, in the case of not carrying out waste gas compression, use the most ripe equipment, cold low temperature water chiller provided by low freezing point intermediate medium passes to dinitrogen tetroxide waste gas, reduce dinitrogen tetroxide EGT, dinitrogen tetroxide waste gas is made to reach hypersaturated state, it is achieved dinitrogen tetroxide condensation is reclaimed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016101723774 | 2016-03-24 | ||
| CN201610172377 | 2016-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105999981A true CN105999981A (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610530537.8A Pending CN105999981A (en) | 2016-03-24 | 2016-07-07 | Method for condensing and recovering dinitrogen tetroxide exhaust gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108057257A (en) * | 2017-12-26 | 2018-05-22 | 中国人民解放军63605部队 | The system and technique of condensation recycling dinitrogen tetroxide exhaust gas resource |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0808797B1 (en) * | 1996-05-23 | 2003-07-30 | Praxair Technology, Inc. | Direct oxygen injection in nitric acid production |
| CN101243012A (en) * | 2005-08-19 | 2008-08-13 | 住友精化株式会社 | Method for purification of nitrogen oxide and apparatus for purification of nitrogen oxide |
| CN105272807A (en) * | 2015-02-14 | 2016-01-27 | 陕西延长石油（集团）有限责任公司延安石油化工厂 | Multi-loop condensation technology for recovery of propylene in polypropylene device tail gas |
-
2016
- 2016-07-07 CN CN201610530537.8A patent/CN105999981A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0808797B1 (en) * | 1996-05-23 | 2003-07-30 | Praxair Technology, Inc. | Direct oxygen injection in nitric acid production |
| CN101243012A (en) * | 2005-08-19 | 2008-08-13 | 住友精化株式会社 | Method for purification of nitrogen oxide and apparatus for purification of nitrogen oxide |
| CN105272807A (en) * | 2015-02-14 | 2016-01-27 | 陕西延长石油（集团）有限责任公司延安石油化工厂 | Multi-loop condensation technology for recovery of propylene in polypropylene device tail gas |
Non-Patent Citations (1)
| Title |
|---|
| 霍玉林: "国外四氧化二氮治理发展概况", 《国外导弹与宇航》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108057257A (en) * | 2017-12-26 | 2018-05-22 | 中国人民解放军63605部队 | The system and technique of condensation recycling dinitrogen tetroxide exhaust gas resource |
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Application publication date: 20161012 |
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