CN113154799A - Liquid oxygen jet evaporator of air separation equipment - Google Patents
Liquid oxygen jet evaporator of air separation equipment Download PDFInfo
- Publication number
- CN113154799A CN113154799A CN202110253394.1A CN202110253394A CN113154799A CN 113154799 A CN113154799 A CN 113154799A CN 202110253394 A CN202110253394 A CN 202110253394A CN 113154799 A CN113154799 A CN 113154799A
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- China
- Prior art keywords
- liquid oxygen
- cylinder body
- nozzle
- liquid
- air separation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 238000000926 separation method Methods 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims description 23
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 229910052697 platinum Inorganic materials 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000006200 vaporizer Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J5/00—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/20—Sprayers
Abstract
A liquid oxygen jet evaporator of an air separation plant comprises a cylinder body, wherein a plurality of thermometers, branch pipes and an injector are respectively arranged on the cylinder body, the branch pipes and the injector are arranged above the cylinder body, the thermometers are respectively arranged above and below the cylinder body, the injector consists of a bent pipe, a first flange component and a nozzle, the bent pipe penetrates through the cylinder body, a connecting sleeve is arranged at the inlet end of one side of the bent pipe, which is positioned outside the upper part of the cylinder body, the connecting sleeve is fixedly connected with a second flange component through a screw, a nozzle connector is arranged at the outlet end of one side, which is positioned inside the cylinder body, the nozzle connector is rotationally fixed with the nozzle through a screw thread, and a gasket is arranged between the nozzle connector and the nozzle.
Description
Technical Field
The invention relates to a liquid oxygen jet evaporator of an air separation plant, belonging to the technical field of air separation plants.
Background
Deep cooling technology is rapidly advanced, air separation equipment gradually becomes a trend towards large-scale development, and large-scale air separation mainly produces gaseous products and liquid products. The cryogenic technology for separating oxygen and nitrogen generally adopts an air separation cryogenic rectification process to prepare liquid oxygen and liquid nitrogen, during the rectification process, because the liquid oxygen in a condenser is continuously evaporated, the danger of concentrating hydrocarbon is generated, and if acetylene is concentrated in the liquid oxygen and the liquid air to a certain extent, the possibility of explosion is generated, so that the concentration can be prevented by continuously discharging liquid oxygen which is 1 percent of the amount of the product oxygen from a condenser-still. Under the normal condition, liquid oxygen in the main condenser enters the liquid oxygen injection evaporator by virtue of the static pressure difference of the liquid oxygen injection evaporator to exchange heat with oxygen which is pumped out from the bottom of the upper tower and reheated to normal temperature by the main heat exchanger, and then enters an oxygen pipe network together for users to use. However, in the liquid oxygen injection evaporator, the pressure difference between the reheated oxygen and the liquid oxygen from the injection port is not large, so that the situation of unsmooth liquid oxygen discharge often occurs.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides the liquid oxygen jet evaporator of the air separation plant, which utilizes an ejector to spray liquid oxygen from a small hole to form a spray shape, and the liquid oxygen jet evaporator and oxygen from a main heat exchanger perform sufficient heat exchange to vaporize the liquid oxygen to enter an oxygen pipe network for users to use. The invention has simple and reasonable structure and lower cost, and can effectively solve the problem of unsmooth discharge of liquid oxygen in the liquid oxygen jet evaporator in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a liquid oxygen injection evaporator of an air separation device comprises a barrel, wherein a plurality of thermometers, branch pipes and an injector are respectively arranged on the barrel, the branch pipes and the injector are arranged above the barrel, the thermometers are respectively arranged above and below the barrel, the injector consists of a bent pipe, a first flange component and an injection nozzle which penetrate through the barrel, a connecting sleeve is arranged at the inlet end of one side of the bent pipe, which is positioned outside the upper part of the barrel, and is fixedly connected with a second flange component through screws, a nozzle connector is arranged at the outlet end of one side, which is positioned inside the barrel, and is rotationally fixed with the injection nozzle through threads, a gasket is arranged between the nozzle connector and the nozzle, a front liquid baffle and a rear liquid baffle are respectively welded at two sides of the bottom end inside the barrel, and form a small liquid storage tank with the barrel at the bottom, for collecting residual liquid not vaporized in time due to spraying from the sprayer
Preferably, the method comprises the following steps: the elbow is composed of a shell, a liquid oxygen discharge pipe and pearly-lustre sand, wherein the pearly-lustre sand is filled between the shell and the liquid oxygen discharge pipe to prevent liquid oxygen from being gasified through heat exchange and blocking liquid oxygen from being discharged, a connecting sleeve is embedded into the outer side of the liquid oxygen discharge pipe in the barrel and is welded on the outer side wall of the liquid oxygen discharge pipe in a welding mode, a first sealing plate is welded between the connecting sleeve and the inner wall of the shell, the pearly-lustre sand is sealed between the shell and the liquid oxygen discharge pipe, a nozzle connecting head is composed of a second sealing plate, one side of the second sealing plate is provided with a fixing edge, the other side of the second sealing plate is provided with a connecting head, the fixing edge is fixed on the outer side wall of the liquid oxygen discharge pipe in a welding mode, fixing threads are arranged on the connecting head and are fixed with threads on a spray head through rotating threads, and a circle of flow blocking plates is arranged on the outer side of the second sealing plate.
Preferably, the method comprises the following steps: a plurality of rib plates are welded between the outer side of the upper shell wall of the bent pipe and the barrel, and a plurality of rib plates are welded between the lower flow baffle plate of the bent pipe and the barrel and used for enhancing the connection strength.
Preferably, the method comprises the following steps: the end part of the nozzle is provided with a small hole, so that the function of spraying the small hole is realized, liquid oxygen can fully and effectively exchange heat with oxygen to be vaporized, and the nozzle is made of copper.
Preferably, the method comprises the following steps: the nozzle connecting head is made of stainless steel.
Preferably, the method comprises the following steps: the upper end of the branch pipe is welded with the second flange assembly, and the lower end of the branch pipe is welded with the cylinder; the handle is connected with the second flange assembly through welding; a hollow connecting pipe is arranged in the branch pipe, the upper end of the connecting pipe is connected with the bottom of the second flange assembly in a welding mode, and the lower end of the connecting pipe is connected with the sealing plate in a welding mode to form an access hole of the ejector.
Preferably, the method comprises the following steps: the thermometer consists of a platinum resistor penetrating through the cylinder body and a thermometer sleeve sleeved outside the platinum resistor, and is respectively arranged on the front side, the rear side and the bottom of the cylinder body above the cylinder body.
The air separation liquid oxygen injection evaporator is required to be replaced due to the possibility of failure of the platinum resistor, and in order to ensure that the liquid oxygen injection evaporator is not affected in the replacement process, one end, extending into the cylinder, of the thermometer sleeve is designed to be in a closed form.
The liquid oxygen spraying evaporator has the advantages that liquid oxygen is sprayed from the small holes to form a spray shape by using the spraying device and is subjected to sufficient heat exchange with oxygen from the main heat exchanger to be vaporized, and the liquid oxygen spraying evaporator is simple in structure, low in cost, convenient to maintain, safe and reliable.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic full-section view of the structure of the present invention.
FIG. 3 is a schematic view of the structure of the spraying device of the present invention.
FIG. 4 is a schematic view of the full section of the structure of the spraying device of the present invention.
Detailed Description
The invention will be described in detail below with reference to the following figures: as shown in fig. 1-4, a liquid oxygen jet evaporator of an air separation plant, which comprises a barrel 1, wherein the barrel 1 is provided with a plurality of thermometers 2, branch pipes 6 and an ejector 5, wherein the branch pipes 6 and the ejector 5 are arranged above the barrel 1, the thermometers 9 are arranged above and below the barrel 1 respectively, the ejector 5 is composed of a bent pipe 504, a first flange component 501 and a nozzle 506, which run through the barrel 1, wherein the inlet end of one side of the bent pipe 504, which is positioned outside the top of the barrel 1, is provided with a connecting sleeve 11, the connecting sleeve 11 is fixedly connected with a second flange component 7 through screws, the outlet end of one side, which is positioned inside the barrel 1, is provided with a nozzle connector 510, the nozzle connector 510 is rotationally fixed with the nozzle 506 through threads, a gasket 511 is arranged between the nozzle connector 510 and the nozzle 506, both sides of the bottom end inside the barrel 1 are respectively welded with a front liquid baffle 13 and a rear liquid baffle 14, the front liquid baffle 13 and the rear liquid baffle 14 form a small liquid storage tank on the bottom 1 cylinder for collecting residual liquid which is not vaporized in time due to the spraying of the sprayer 5, the elbow 504 is composed of a shell, a liquid oxygen discharge pipe 508 and pearlife 509, the pearlife 509 is filled between the shell and the liquid oxygen discharge pipe 508 to prevent the liquid oxygen from being gasified by heat exchange and blocking the discharge of the liquid oxygen, the connecting sleeve 11 is embedded on the outer side of the liquid oxygen discharge pipe 508 in the cylinder 1 and welded on the outer side wall of the liquid oxygen discharge pipe 508 by welding, a first sealing plate 503 is welded between the connecting sleeve 11 and the inner wall of the shell to seal the pearlife 509 between the shell and the liquid oxygen discharge pipe 508, the nozzle connector 510 is composed of a second sealing plate 512 with a fixed edge on one side and a connector on the other side, the fixed edge is fixed on the outer side wall of the liquid oxygen discharge pipe 508 by welding, the connecting head is provided with fixed threads which are fixed with the threads on the spray head through rotating threads, the outer side of the second sealing plate 512 is provided with a circle of flow baffle plate 507, a plurality of rib plates 4 are welded between the outer side of the upper shell wall of the elbow 504 and the barrel body 1, a plurality of rib plates 4 are welded between the flow baffle plate 507 below the elbow 504 and the barrel body 1 for enhancing the connection strength, the end part of the nozzle 506 is provided with a small hole for realizing the function of small hole spraying, so that liquid oxygen can fully and effectively exchange heat with oxygen and further vaporize, the nozzle 506 is made of copper, the connecting head 510 of the nozzle 506 is made of stainless steel, the upper end of the branch pipe 6 is welded with the second flange component 7, and the lower end of the branch pipe is welded with the barrel body 1; and a handle 8 is connected with the second flange component 7 through welding; the thermometer 9 is composed of a platinum resistor 3 penetrating through the cylinder 1 and a thermometer sleeve 15 sleeved outside the platinum resistor 3, and is respectively arranged on the front side, the rear side and the bottom of the cylinder 1 above the cylinder 1.
The specific working process is as follows: liquid oxygen produced by the air separation plant enters an ejector 5 of the raffinate evaporator through a conveying pipeline and a second flange assembly 7 and is ejected out through a nozzle 506, the ejected liquid oxygen and oxygen from a heat exchanger of the air separation plant are subjected to heat exchange vaporization in a cylinder 1, and the vaporized oxygen enters a pipe network for users to use; the platinum resistor 3 and the platinum resistor A10 respectively measure the temperature before and after the ejector 5 in real time, if the temperature of the two is not deviated, the amount of the liquid oxygen ejected by the ejector 5 is too small, namely the evaporation amount is too small, and the amount of the liquid oxygen entering the raffinate evaporator needs to be increased; the platinum resistor B16 is used for measuring the temperature of the bottom of the cylinder 1, if the temperature is lower than a critical value, it indicates that liquid oxygen exists in a liquid storage tank formed between the bottom of the cylinder 1 and the front liquid baffle 13 and the front liquid baffle 14, namely the amount of the liquid oxygen entering the residual liquid evaporator is too large and the vaporization is insufficient, and at the moment, the amount of the liquid oxygen entering the residual liquid evaporator needs to be reduced to ensure that the liquid oxygen is fully vaporized; in order to facilitate the maintenance and repair of the ejector 5, a maintenance opening is arranged at the top of the barrel 1.
Claims (7)
1. The utility model provides an air separation plant's liquid oxygen sprays evaporimeter, it includes the barrel, its characterized in that: the cylinder body is respectively provided with a plurality of thermometers, branch pipes and ejectors, wherein the branch pipes and the ejectors are arranged above the cylinder body, the thermometers are respectively arranged above and below the cylinder body, the ejectors comprise bent pipes penetrating through the cylinder body, a first flange component and an ejecting nozzle, wherein the inlet end of one side of the elbow pipe positioned outside the upper part of the cylinder body is provided with a connecting sleeve which is fixedly connected with the second flange component through a screw, the outlet end of one side positioned inside the cylinder body is provided with a nozzle connector, the nozzle connector is rotationally fixed with the spray nozzle through threads, a gasket is arranged between the nozzle connector and the nozzle, a front liquid baffle and a rear liquid baffle are respectively welded on two sides of the bottom end in the cylinder body, the front liquid baffle and the rear liquid baffle form a small liquid storage tank for collecting residual liquid which is not vaporized in time due to the ejection of the ejector.
2. The liquid oxygen jet evaporator of an air separation plant according to claim 1, characterized in that: the elbow is composed of a shell, a liquid oxygen discharge pipe and pearly-lustre sand, wherein the pearly-lustre sand is filled between the shell and the liquid oxygen discharge pipe to prevent liquid oxygen from being gasified through heat exchange and blocking liquid oxygen from being discharged, a connecting sleeve is embedded into the outer side of the liquid oxygen discharge pipe in the barrel and is welded on the outer side wall of the liquid oxygen discharge pipe in a welding mode, a first sealing plate is welded between the connecting sleeve and the inner wall of the shell, the pearly-lustre sand is sealed between the shell and the liquid oxygen discharge pipe, a nozzle connecting head is composed of a second sealing plate, one side of the second sealing plate is provided with a fixing edge, the other side of the second sealing plate is provided with a connecting head, the fixing edge is fixed on the outer side wall of the liquid oxygen discharge pipe in a welding mode, fixing threads are arranged on the connecting head and are fixed with threads on a spray head through rotating threads, and a circle of flow blocking plates is arranged on the outer side of the second sealing plate.
3. The ejector for an air separation liquid oxygen injection vaporizer according to claim 2, characterized in that: a plurality of rib plates are welded between the outer side of the upper shell wall of the elbow and the barrel body), and a plurality of rib plates are welded between the lower flow baffle plate of the elbow and the barrel body and used for enhancing the connection strength.
4. The liquid oxygen jet evaporator of the air separation plant according to claim 2, characterized in that: the end part of the nozzle is provided with a small hole, so that the function of spraying the small hole is realized, liquid oxygen can fully and effectively exchange heat with oxygen to be vaporized, and the nozzle is made of copper.
5. The liquid oxygen jet evaporator of the air separation plant according to claim 2, characterized in that: the nozzle connecting head is made of stainless steel.
6. The liquid oxygen jet evaporator of an air separation plant according to claim 1, characterized in that: the upper end of the branch pipe is welded with the second flange assembly, and the lower end of the branch pipe is welded with the cylinder; the handle is connected with the second flange assembly through welding; a hollow connecting pipe is arranged in the branch pipe, the upper end of the connecting pipe is connected with the bottom of the second flange assembly in a welding mode, and the lower end of the connecting pipe is connected with the sealing plate in a welding mode to form an access hole of the ejector.
7. The liquid oxygen jet evaporator of an air separation plant according to claim 1, characterized in that: the thermometer consists of a platinum resistor penetrating through the cylinder body and a thermometer sleeve sleeved outside the platinum resistor, and is respectively arranged on the front side, the rear side and the bottom of the cylinder body above the cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110253394.1A CN113154799A (en) | 2021-03-09 | 2021-03-09 | Liquid oxygen jet evaporator of air separation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110253394.1A CN113154799A (en) | 2021-03-09 | 2021-03-09 | Liquid oxygen jet evaporator of air separation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113154799A true CN113154799A (en) | 2021-07-23 |
Family
ID=76884553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110253394.1A Pending CN113154799A (en) | 2021-03-09 | 2021-03-09 | Liquid oxygen jet evaporator of air separation equipment |
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| Country | Link |
|---|---|
| CN (1) | CN113154799A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB671859A (en) * | 1949-05-20 | 1952-05-14 | Linde Air Prod Co | Process of and apparatus for separating gas mixtures containing higher-boiling impurities |
| GB832159A (en) * | 1957-09-14 | 1960-04-06 | Linde Eismaschinen Ag | Improvements in or relating to gas mixture rectification apparatus |
| US6447940B1 (en) * | 1999-06-15 | 2002-09-10 | Honda Giken Kogyo Kabushiki Kaisha | Evaporation control method for liquid fuel in fuel cell system |
| CN105758123A (en) * | 2016-04-22 | 2016-07-13 | 天脊煤化工集团股份有限公司 | Method and device for preventing accumulative explosion of hydrocarbon compounds |
| CN207570009U (en) * | 2017-12-01 | 2018-07-03 | 上海原能细胞生物低温设备有限公司 | Liquid nitrogen cooling and dehumidifying device |
| CN214665576U (en) * | 2021-03-09 | 2021-11-09 | 杭州杭氧低温液化设备有限公司 | Liquid oxygen jet evaporator of air separation plant |
-
2021
- 2021-03-09 CN CN202110253394.1A patent/CN113154799A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB671859A (en) * | 1949-05-20 | 1952-05-14 | Linde Air Prod Co | Process of and apparatus for separating gas mixtures containing higher-boiling impurities |
| GB832159A (en) * | 1957-09-14 | 1960-04-06 | Linde Eismaschinen Ag | Improvements in or relating to gas mixture rectification apparatus |
| US6447940B1 (en) * | 1999-06-15 | 2002-09-10 | Honda Giken Kogyo Kabushiki Kaisha | Evaporation control method for liquid fuel in fuel cell system |
| CN105758123A (en) * | 2016-04-22 | 2016-07-13 | 天脊煤化工集团股份有限公司 | Method and device for preventing accumulative explosion of hydrocarbon compounds |
| CN207570009U (en) * | 2017-12-01 | 2018-07-03 | 上海原能细胞生物低温设备有限公司 | Liquid nitrogen cooling and dehumidifying device |
| CN214665576U (en) * | 2021-03-09 | 2021-11-09 | 杭州杭氧低温液化设备有限公司 | Liquid oxygen jet evaporator of air separation plant |
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