CN202766294U - Gas-liquid separation device for extraction of high-purity liquid nitrogen - Google Patents
Gas-liquid separation device for extraction of high-purity liquid nitrogen Download PDFInfo
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- CN202766294U CN202766294U CN 201220402096 CN201220402096U CN202766294U CN 202766294 U CN202766294 U CN 202766294U CN 201220402096 CN201220402096 CN 201220402096 CN 201220402096 U CN201220402096 U CN 201220402096U CN 202766294 U CN202766294 U CN 202766294U
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Abstract
The utility model discloses a gas-liquid separation device for extraction of high-purity liquid nitrogen. The gas-liquid separation device for the extraction of the high-purity liquid nitrogen comprises a first gas-liquid separator and a second gas-liquid separator, and diameter and height of a tank of the first gas-liquid separator are both larger than diameter and height of a tank of the second gas-liquid separator. When the gas-liquid separation device is operated, due to the theory of communicating vessels, the liquid nitrogen flows from the first gas-liquid separator to the second gas-liquid separator so as to guarantee that the liquid nitrogen is filled in the tank of the second gas-liquid separator, a part of the liquid nitrogen in the second gas-liquid separator serves as backflow liquid of an upper tower, and the other part of the liquid nitrogen in the second gas-liquid separator is taken out as products. The gas-liquid separation device adopts a double-tank structure. In an all liquid air separation device, continuous extraction of the high-purity liquid nitrogen is guaranteed, fluctuation of purity of the nitrogen cannot be caused, and working condition of the extraction of the high-purity liquid nitrogen is stabilized. Simultaneously, gasification rate of the products is reduced, and corresponding output of the products is improved.
Description
Technical field
The utility model belongs to full liquid air separation plant technical field, is specifically related to a kind of gas-liquid separation device for the high-purity liquid nitrogen extraction.
Background technology
Nitrogen is the main component of air, is colourless, tasteless, nontoxic and non-flammable gas under room temperature and barometric point, and boiling point is-195.8 ℃, the chemical property torpescence.Except synthetic ammonia, nitrogen usually is used as protection gas and is widely used in the industries such as metallurgy, chemical industry, coal, food, medicine, electronics, magnetic material, transportation, thermal treatment, tire, thermoelectricity, aviation.Application in some fields has strict requirement to the purity of nitrogen, and for example, requiring the purity of nitrogen in float glass technology is 99.9995%, without hydrogen; In the thermal treatment process nitrogen gas purity being required is 99.9995%; Aluminum processing is 99.9995% to the purity requirement of nitrogen, without hydrogen, otherwise has " hydrogen born of the same parents " phenomenon.The method of nitrogen purification mainly contains absorption method, pressure swing adsorption process, membrane separation process etc.
Full liquified air separation system is to produce the air-seperation system of the liquid space division products such as liquid oxygen, liquid nitrogen, liquid argon, purified by molecular sieve adsorption, and the turbine boosting swell refrigeration, the systems such as full distillation non hydrogen argon processed form.High-purity liquid nitrogen Extraction parts in full liquid space division system, liquid nitrogen have the sub-fraction gasification after throttling, in equipment running process, the upper tower pressure fluctuation is larger, and upper tower resistance and to go out the liquid nitrogen temperature of supercooler higher has affected the purity of liquid nitrogen.
Summary of the invention
The purpose of this utility model is in order to stablize the operation condition of high-purity liquid nitrogen extraction element, improves the purity of liquid nitrogen product, and a kind of gas-liquid separation device that extracts for high-purity liquid nitrogen is provided.
In order to realize above purpose, the technical scheme that the utility model adopts is: a kind of gas-liquid separation device for the high-purity liquid nitrogen extraction, comprise the first gas-liquid separator 1 and the second gas-liquid separator 2, the diameter of the first gas-liquid separator 1 tank body and highly all greater than the diameter of the second gas-liquid separator 2 tank bodies and height, liquid nitrogen flows to the second gas-liquid separator 2 from the first gas-liquid separator 1, guarantees to be full of liquid nitrogen in the second gas-liquid separator 2 tank bodies.
Described the first gas-liquid separator 1 bottom is communicated with by the first pipeline 5 and second pipe 7 with the second gas-liquid separator 2 bottoms, and the second gas-liquid separator 2 tops are provided with return line 9.
Described the first gas-liquid separator 1 top connects the first nitrogen outlet pipe 6, and described the first nitrogen outlet pipe 6 is connected with nitrogen outlet house steward 11.
Described the first gas-liquid separator 1 and the second gas-liquid separator 2 are installed in the same level position.
Adopt the workflow of the gas-liquid separation device that extracts for high-purity liquid nitrogen of the present utility model to be: the liquid nitrogen through throttling enters the gas that the first gas-liquid separator 1 is removed liquid nitrogen through liquid nitrogen inlet pipe 4, because law of connected vessels, liquid nitrogen after the separation enters the second gas-liquid separator 2 through the first pipeline 5 of the first gas-liquid separator 1 bottom and the second gas liquid outlet pipe 7 of the second gas-liquid separator 2 bottoms, be full of liquid in the second gas-liquid separator 2 tank bodies, wherein the return line 9 of a part through the second gas-liquid separator 2 tops is back to the top of upper tower 3, and another part flows into liquid nitrogen outlet header 8 as product through bottom second pipe 7.The first gas-liquid separator 1 isolated gas enters nitrogen outlet house steward 11 through the first nitrogen outlet pipe 6, and the nitrogen that upper tower 3 produces enters nitrogen outlet house steward 11 through upper tower nitrogen outlet pipe 10.
As further improvement of the utility model, described second pipe 7 is deep into the top in the tank body from the second gas-liquid separator 2 bottoms, as the liquid nitrogen import of the second gas-liquid separator 2, the bottom of described the second gas-liquid separator 2 is provided with liquid nitrogen outlet header 8, exports as liquid nitrogen product.During work, liquid nitrogen in the first gas-liquid separator 1 tank body enters the second gas-liquid separator 2 through the first pipeline 5 and second pipe 7, be full of liquid nitrogen in the second gas-liquid separator 2 tank bodies, wherein a part is back to upper tower 3 through return line 9, and another part takes out through bottom liquid nitrogen outlet header 8 as product.
Gas-liquid separation device of the present utility model adopts two jar structures, liquid nitrogen flows to the second gas-liquid separator from the first gas-liquid separator, guarantee to be full of liquid nitrogen in the second gas-liquid separator tank body, this liquid nitrogen part is taken out as product, this appliance ensure continuous extraction high-purity liquid nitrogen and do not cause the fluctuation of nitrogen purity, stablized the operating mode that high-purity liquid nitrogen extracts, the vaporization rate because of product reduces simultaneously, and corresponding output also is improved.
Description of drawings
The gas-liquid separation device structural representation that Fig. 1 extracts for being used for high-purity liquid nitrogen;
Fig. 2 is the structural representation of the another kind of embodiment of the utility model;
Number in the figure explanation: 1-the first gas-liquid separator, 2-the second gas-liquid separator, the upper tower of 3-, 4-liquid nitrogen inlet pipe, 5-the first pipeline, 6-the first nitrogen outlet pipe, 7-second pipe, 8-liquid nitrogen outlet header, the 9-return line, the upper tower nitrogen outlet pipe of 10-, 11-nitrogen outlet house steward.
Embodiment
As shown in Figure 1, a kind of gas-liquid separation device for the high-purity liquid nitrogen extraction, comprise the first gas-liquid separator 1 and the second gas-liquid separator 2, the diameter of the first gas-liquid separator 1 tank body and highly all greater than the diameter of the second gas-liquid separator 2 tank bodies and height, liquid nitrogen flows to the second gas-liquid separator 2 from the first gas-liquid separator 1, guarantees to be full of liquid nitrogen in the second gas-liquid separator 2 tank bodies.
Described the first gas-liquid separator 1 bottom is communicated with by the first pipeline 5 and second pipe 7 with the second gas-liquid separator 2 bottoms, and the second gas-liquid separator 2 tops are communicated with by return line 9 with upper tower 3 tops.Described the first gas-liquid separator 1 top connects the first nitrogen outlet pipe 6, with the upper tower nitrogen outlet pipe 10 access nitrogen outlet house stewards 11 in parallel at upper tower 3 tops.Described the first gas-liquid separator 1 and the second gas-liquid separator 2 are installed in the same level position.Described second pipe 7 is deep into the top in the tank body from the second gas-liquid separator 2 bottoms, as the liquid nitrogen import of the second gas-liquid separator 2, described liquid nitrogen outlet header 8 is arranged on the bottom of the second gas-liquid separator 2, exports as liquid nitrogen product.
Adopt the workflow of the gas-liquid separation device that extracts for high-purity liquid nitrogen of the present utility model to be: the liquid nitrogen through throttling enters the gas that the first gas-liquid separator 1 is removed liquid nitrogen through liquid nitrogen inlet pipe 4, because law of connected vessels, liquid nitrogen after the separation enters the second gas-liquid separator 2 through the first pipeline 5 of the first gas-liquid separator 1 bottom and the second gas liquid outlet pipe 7 of the second gas-liquid separator 2 bottoms, be full of liquid in the second gas-liquid separator 2 tank bodies, wherein the return line 9 of a part through the second gas-liquid separator 2 tops is back to the top of upper tower 3, and another part flows into liquid nitrogen outlet header 8 as product through bottom second pipe 7.The first gas-liquid separator 1 isolated gas enters nitrogen outlet house steward 11 through the first nitrogen outlet pipe 6, and the nitrogen that upper tower 3 produces enters nitrogen outlet house steward 11 through upper tower nitrogen outlet pipe 10.
According to the present embodiment existing installation is transformed, after equipment moves 24h continuously, viewing system, and with transform before compare, as shown in the table, upper tower pressure decreases than before, the purity of liquid nitrogen has improved greatly.
| Before the transformation | After the transformation | |
| Upper tower pressure (kPa) | 42 | 37 |
| Purity liquid nitrogen (ppm) | 2 | <1 |
As shown in Figure 2, as another kind of embodiment of the present utility model, second pipe 7 is deep into the top in the tank body from the second gas-liquid separator 2 bottoms, liquid nitrogen import as the second gas-liquid separator 2, described liquid nitrogen outlet header 8 is arranged on the bottom of the second gas-liquid separator 2, exports as liquid nitrogen product.During work, liquid nitrogen in the first gas-liquid separator 1 tank body enters the second gas-liquid separator 2 through the first pipeline 5 and second pipe 7, be full of liquid nitrogen in the second gas-liquid separator 2 tank bodies, wherein a part is back to upper tower 3 through return line 9, and another part takes out through bottom liquid nitrogen outlet header 8 as product.
Claims (5)
1. one kind is used for the gas-liquid separation device that high-purity liquid nitrogen extracts, it is characterized in that: comprise the first gas-liquid separator (1) and the second gas-liquid separator (2), the diameter of the first gas-liquid separator (1) tank body and highly all greater than the diameter of the second gas-liquid separator (2) tank body and height, liquid nitrogen flows to the second gas-liquid separator (2) from the first gas-liquid separator (1), guarantees to be full of liquid nitrogen in the second gas-liquid separator (2) tank body.
2. the gas-liquid separation device that extracts for high-purity liquid nitrogen according to claim 1, it is characterized in that: described the first gas-liquid separator (1) bottom is communicated with by the first pipeline (5) and second pipe (7) with the second gas-liquid separator (2) bottom, and the second gas-liquid separator (2) top is provided with return line (9).
3. the gas-liquid separation device that extracts for high-purity liquid nitrogen according to claim 1, it is characterized in that: described the first gas-liquid separator (1) top connects the first nitrogen outlet pipe (6), and described the first nitrogen outlet pipe (6) is connected with nitrogen outlet house steward (11).
4. the gas-liquid separation device that extracts for high-purity liquid nitrogen according to claim 1, it is characterized in that: described the first gas-liquid separator (1) and the second gas-liquid separator (2) are installed in the same level position.
5. the gas-liquid separation device that extracts for high-purity liquid nitrogen according to claim 2, it is characterized in that: described second pipe (7) is deep into the top in the tank body from the second gas-liquid separator (2) bottom, liquid nitrogen import as the second gas-liquid separator (2), the bottom of described the second gas-liquid separator (2) is provided with liquid nitrogen outlet header (8), exports as liquid nitrogen product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220402096 CN202766294U (en) | 2012-08-14 | 2012-08-14 | Gas-liquid separation device for extraction of high-purity liquid nitrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220402096 CN202766294U (en) | 2012-08-14 | 2012-08-14 | Gas-liquid separation device for extraction of high-purity liquid nitrogen |
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| Publication Number | Publication Date |
|---|---|
| CN202766294U true CN202766294U (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220402096 Expired - Fee Related CN202766294U (en) | 2012-08-14 | 2012-08-14 | Gas-liquid separation device for extraction of high-purity liquid nitrogen |
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| CN (1) | CN202766294U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105285308A (en) * | 2015-11-12 | 2016-02-03 | 北京中科宇麒科技有限公司 | Movable automatically-controlled liquid nitrogen ice cream machine |
-
2012
- 2012-08-14 CN CN 201220402096 patent/CN202766294U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105285308A (en) * | 2015-11-12 | 2016-02-03 | 北京中科宇麒科技有限公司 | Movable automatically-controlled liquid nitrogen ice cream machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20140814 |
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| EXPY | Termination of patent right or utility model |