CN202725600U - Low temperature ordinary pressure liquid nitrogen storage tank evaporated and diffused gas recovery unit - Google Patents
Low temperature ordinary pressure liquid nitrogen storage tank evaporated and diffused gas recovery unit Download PDFInfo
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- CN202725600U CN202725600U CN 201220401722 CN201220401722U CN202725600U CN 202725600 U CN202725600 U CN 202725600U CN 201220401722 CN201220401722 CN 201220401722 CN 201220401722 U CN201220401722 U CN 201220401722U CN 202725600 U CN202725600 U CN 202725600U
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- liquid nitrogen
- nitrogen storage
- low temperature
- pressure liquid
- gas
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Abstract
The utility model relates to a diffused gas recovery unit in the field of metallurgy and provides a low temperature ordinary pressure liquid nitrogen storage tank evaporated and diffused gas recovery unit, pipelines are connected with a gas evaporation and diffusion pipe of a low temperature ordinary pressure liquid nitrogen storage tank and respectively communicated to a seal gas inlet and a purge gas inlet of a low temperature liquid pump, and valves are arranged on the pipelines. The recovery unit is simple in configuration, only a few pipelines need to be additionally arranged, and only a few amounts of joints and valves need to be added to effectively complete the recovery work of gasified nitrogen in the low temperature ordinary pressure nitrogen tank, the evaporated nitrogen of the low temperature liquid nitrogen storage tank is utilized to replace conventional compressed nitrogen used in the low temperature liquid pump, so that the purposes of utilization of waste gas, energy conservation and consumption reduction are achieved.
Description
Technical field
The utility model relates to a kind of diffused gas retracting device of field of metallurgy, specifically a kind of low-temperature atmosphere-pressure liquid nitrogen storage evaporation diffused gas retracting device.
Background technology
The steel-making oxyen manutactory produced liquid nitrogen product (2 * 10 in empty minute
-6O
2) send into the low-temperature atmosphere-pressure liquid nitrogen storage after, although cryogenic tank adopts the low-temperature expansion pearlite insulation, but because conducting heat in the external world, low-temperature atmosphere-pressure liquid nitrogen storage pressure is low, insulation effect is limited, still has part liquid nitrogen gasification phenomenon, is designed with 2.7 ‰ vaporization emptying amount, and low-temperature atmosphere-pressure liquid nitrogen storage pressure is low, only has 40kPa.In the prior art, storage tank emptying nitrogen is without recycling, all directly emptying of vaporization nitrogen.
Because low temperature liquid nitrogen storage tank pressure is not high, most low temperature liquid nitrogen storage tanks are designed with certain gasification emptying nitrogen, this gas has the characteristics such as cleaning, drying (dew point is about-190 ℃), but because gasification nitrogen is difficult to recovery, so general producer is all with its direct emptying.Large Atmosphere Pressure liquid nitrogen storage day rate of gasification is about 0.27%, and hour evaporating capacity is greatly about 250m
3About.
The utility model content
Technical problem to be solved in the utility model is, overcome the shortcoming of prior art, a kind of low-temperature atmosphere-pressure liquid nitrogen storage evaporation diffused gas retracting device is provided, utilize the nitrogen of low temperature liquid nitrogen storage tank evaporation to substitute the conventional compressed nitrogen that is used for cryogenic liquid pump, reach exhaust gas utilization, energy-saving and cost-reducing purpose.
The technical scheme that the utility model solves above technical problem is:
Low-temperature atmosphere-pressure liquid nitrogen storage evaporation diffused gas retracting device is connected to blanket gas import and the sweep gas import that pipeline is communicated to respectively cryogenic liquid pump at the gas evaporation exhaust stack of low-temperature atmosphere-pressure liquid nitrogen storage, and pipeline is provided with valve.
The technical scheme that the utility model further limits is:
Aforesaid low-temperature atmosphere-pressure liquid nitrogen storage evaporation diffused gas retracting device, gas evaporation exhaust stack at the low-temperature atmosphere-pressure liquid nitrogen storage is connected to a house steward, pick out the two-way arm on the house steward, wherein the first arm is connected to the blanket gas import of cryogenic liquid pump, wherein the second arm is connected to the sweep gas import of cryogenic liquid pump, all is provided with valve on house steward and two arms.
Aforesaid low-temperature atmosphere-pressure liquid nitrogen storage evaporation diffused gas retracting device and also is connected to blow-down pipe on the pipeline that the gas evaporation exhaust stack of low-temperature atmosphere-pressure liquid nitrogen storage is connected, and blow-down pipe is provided with valve.
The beneficial effects of the utility model are: the utility model configuration is simple, only need set up some pipelines, add a small amount of joint and valve and just can effectively finish the recovery operation of low-temperature atmosphere-pressure nitrogen groove gasification nitrogen, utilize the nitrogen of low temperature liquid nitrogen storage tank evaporation to substitute the conventional compressed nitrogen that is used for cryogenic liquid pump, reach exhaust gas utilization, energy-saving and cost-reducing purpose.Through calculating 1000 m
3The low temperature liquid nitrogen storage tank per hour need evaporate 250m
3Nitrogen, and every liquor pump per hour needs 35m
3Nitrogen if there are 8 cryogenic liquid pumps can use this gas, can reclaim low temperature liquid nitrogen storage tank evaporation nitrogen as sweep gas and blanket gas fully, that is to say per hour save compressed nitrogen 250m
3
Description of drawings
Fig. 1 is connection diagram of the present utility model.
The specific embodiment
The present embodiment provides a kind of low-temperature atmosphere-pressure liquid nitrogen storage evaporation diffused gas retracting device, connect as shown in Figure 1, gas evaporation exhaust stack at low-temperature atmosphere-pressure liquid nitrogen storage 1 is connected to blanket gas import 4 and the sweep gas import 5 that pipeline 3 is communicated to respectively cryogenic liquid pump 6, and pipeline is provided with valve 2.The present embodiment is connected to a house steward at the gas evaporation exhaust stack of low-temperature atmosphere-pressure liquid nitrogen storage, pick out the two-way arm on the house steward, wherein the first arm is connected to the blanket gas import of cryogenic liquid pump, wherein the second arm is connected to the sweep gas import of cryogenic liquid pump, all is provided with valve on house steward and two arms.With also be connected to blow-down pipe on the pipeline that the gas evaporation exhaust stack of low-temperature atmosphere-pressure liquid nitrogen storage is connected, blow-down pipe is provided with valve.
The nitrogen gas of low-temperature atmosphere-pressure liquid nitrogen storage gasification is connected to blanket gas side and the sweep gas side of cryogenic liquid pump by installing pipeline additional, increase several by-pass valve controls in the pipeline and get final product.The utility model configuration is simple, only need set up some pipelines, add a small amount of joint and valve and just can effectively finish the recovery operation of low-temperature atmosphere-pressure nitrogen groove gasification nitrogen, utilize the nitrogen of low temperature liquid nitrogen storage tank evaporation to substitute the conventional compressed nitrogen that is used for cryogenic liquid pump, reach exhaust gas utilization, energy-saving and cost-reducing purpose.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (3)
1. the low-temperature atmosphere-pressure liquid nitrogen storage evaporates the diffused gas retracting device, it is characterized in that: the gas evaporation exhaust stack at the low-temperature atmosphere-pressure liquid nitrogen storage is connected to blanket gas import and the sweep gas import that pipeline is communicated to respectively cryogenic liquid pump, and described pipeline is provided with valve.
2. low-temperature atmosphere-pressure liquid nitrogen storage as claimed in claim 1 evaporates the diffused gas retracting device, it is characterized in that: the gas evaporation exhaust stack at the low-temperature atmosphere-pressure liquid nitrogen storage is connected to a house steward, pick out the two-way arm on the described house steward, wherein the first arm is connected to the blanket gas import of cryogenic liquid pump, wherein the second arm is connected to the sweep gas import of cryogenic liquid pump, all is provided with valve on described house steward and two arms.
3. low-temperature atmosphere-pressure liquid nitrogen storage as claimed in claim 1 or 2 evaporation diffused gas retracting device is characterized in that: with also be connected to blow-down pipe on the pipeline that the gas evaporation exhaust stack of low-temperature atmosphere-pressure liquid nitrogen storage is connected, described blow-down pipe is provided with valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220401722 CN202725600U (en) | 2012-08-07 | 2012-08-07 | Low temperature ordinary pressure liquid nitrogen storage tank evaporated and diffused gas recovery unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220401722 CN202725600U (en) | 2012-08-07 | 2012-08-07 | Low temperature ordinary pressure liquid nitrogen storage tank evaporated and diffused gas recovery unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202725600U true CN202725600U (en) | 2013-02-13 |
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ID=47651350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220401722 Expired - Lifetime CN202725600U (en) | 2012-08-07 | 2012-08-07 | Low temperature ordinary pressure liquid nitrogen storage tank evaporated and diffused gas recovery unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202725600U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406039A (en) * | 2014-11-26 | 2015-03-11 | 大连福佳·大化石油化工有限公司 | Improved recycling system and technology for emptying nitrogen from liquid nitrogen tank |
| CN108087721A (en) * | 2017-11-17 | 2018-05-29 | 深圳市燃气集团股份有限公司 | A kind of nitrogen recycling system and its recovery method |
-
2012
- 2012-08-07 CN CN 201220401722 patent/CN202725600U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406039A (en) * | 2014-11-26 | 2015-03-11 | 大连福佳·大化石油化工有限公司 | Improved recycling system and technology for emptying nitrogen from liquid nitrogen tank |
| CN104406039B (en) * | 2014-11-26 | 2016-05-11 | 大连福佳·大化石油化工有限公司 | Recovery system and the technique of improved liquid nitrogen container emptying nitrogen |
| CN108087721A (en) * | 2017-11-17 | 2018-05-29 | 深圳市燃气集团股份有限公司 | A kind of nitrogen recycling system and its recovery method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |