CN210344994U - Continuous stable oxygen system - Google Patents
Continuous stable oxygen system Download PDFInfo
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- CN210344994U CN210344994U CN201920961108.5U CN201920961108U CN210344994U CN 210344994 U CN210344994 U CN 210344994U CN 201920961108 U CN201920961108 U CN 201920961108U CN 210344994 U CN210344994 U CN 210344994U
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Abstract
The utility model discloses a continuous stable oxygen system, including the liquid oxygen storage tank that is used for storing liquid oxygen, be used for the liquid oxygen pump package with liquid oxygen pressure boost, be used for with the gasification equipment of liquid oxygen heating and be used for guaranteeing oxygen pressure stability's buffer tank and steady voltage system, the entry of liquid oxygen pump package and steady voltage system's entry link to each other with the export of liquid oxygen storage tank respectively, the liquid oxygen pump package, gasification equipment and buffer tank connect gradually and constitute the oxygen pipe network, the export of buffer tank links to each other with steady voltage system's export, steady voltage system's pressure is higher than the pressure of oxygen pipe network. The utility model discloses an oxygen system can realize continuous, the stable supply to low reaches chemical plant oxygen, and the pressure stability, the safe and reliable of its oxygen pipe network can avoid because of the heavy economic loss that the low reaches chemical plant parking that the oxygen supply interrupt arouses caused. The system can be used as an independent system for supplying oxygen to a downstream chemical plant and can also be used as a backup system of an air separation plant, and the system is automatically started when the air separation plant stops.
Description
Technical Field
The utility model relates to a chemical plant device oxygen continuous supply system specifically is a continuous stable oxygen system.
Background
The oxygen supply system supplies oxygen necessary for production to the whole downstream chemical device, and plays a vital role in ensuring the reliable and stable operation of the downstream chemical device. The unexpected shutdown of the oxygen supply system can immediately cut off the supply of oxygen to the downstream process device, thereby causing the interlocking shutdown and production halt of the downstream process device and causing huge economic loss.
The existing oxygen continuous supply system is directly connected to a gasifier through a liquid oxygen storage tank, and liquid oxygen is gasified and reheated in the gasifier and then sent to a downstream chemical device. Because the chemical industry device has higher requirement on oxygen pressure, liquid oxygen supercharging equipment is not arranged in the existing oxygen continuous supply system, and the existing oxygen continuous supply system cannot supply oxygen with higher pressure to a downstream chemical industry device.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that, to prior art not enough, provide a continuous stable oxygen system, this oxygen system can realize continuous, the steady supply to low reaches chemical plant device oxygen, the stable in pressure, the safe and reliable of its oxygen pipe network, can avoid because of the great economic loss that the low reaches chemical plant device that the oxygen supply interrupt arouses parkked and cause.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a continuous stable oxygen supply system comprises a liquid oxygen storage tank for storing liquid oxygen, a liquid oxygen pump set for pressurizing the liquid oxygen, gasification equipment for heating and gasifying the liquid oxygen, a buffer tank for ensuring the oxygen pressure to be stable and a pressure stabilizing system, wherein an inlet of the liquid oxygen pump set and an inlet of the pressure stabilizing system are respectively connected with an outlet of the liquid oxygen storage tank, the liquid oxygen pump set, the gasification equipment and the buffer tank are sequentially connected to form an oxygen pipe network, an outlet of the buffer tank is connected with an outlet of the pressure stabilizing system, and the pressure of the pressure stabilizing system is higher than that of the oxygen pipe network.
The utility model discloses oxygen system during operation, the temperature that comes from the liquid oxygen of liquid oxygen storage tank is about-193 ℃, and pressure is the pressure-fired, pressurizes to required pressure back through liquid oxygen pump package and gets into gasification equipment, and liquid oxygen carries out abundant heat exchange with the external world in gasification equipment, becomes hyperbaric oxygen by liquid oxygen and gets into the buffer tank.
The liquid oxygen pump set can meet the requirement of a downstream chemical device on higher pressure of oxygen, and the pressure stabilizing system can effectively ensure continuous and stable supply of oxygen under normal operation and accident conditions.
When the buffer tank can guarantee that the oxygen quantity of the downstream chemical device is suddenly increased, the system can supplement oxygen to the oxygen pipe network in a short time, and the oxygen pressure in the oxygen pipe network is stable. However, the buffer tank can only ensure the stability of the oxygen pressure in the oxygen pipe network in a short time, and the pressure stabilizing system can effectively ensure the long-term stability of the oxygen pressure in the oxygen pipe network.
The utility model discloses oxygen system can realize continuous, the stable supply to low reaches chemical plant oxygen, and the pressure stability, the safe and reliable of its oxygen pipe network can avoid because of the heavy economic loss that the low reaches chemical plant parking that the oxygen supply interrupt arouses caused. The system can be used as an independent system for supplying oxygen to a downstream chemical plant and can also be used as a backup system of an air separation plant, and the system is automatically started when the air separation plant stops.
Preferably, the liquid oxygen pump set comprises two liquid oxygen pumps arranged in parallel, and the gasification equipment comprises two first gasifiers arranged in parallel. The two liquid oxygen pumps are matched with the two first gasifiers, and the liquid oxygen pumps and the first gasifiers are used and prepared to ensure the continuous supply of oxygen.
Furthermore, an outlet of the liquid oxygen pump group is connected with a first pressure regulating valve, a first temperature sensor, a first pressure sensor, a flow sensor, a second pressure regulating valve and a first safety valve are arranged on a pipeline between an outlet of the gasification equipment and an inlet of the buffer tank, a first emptying pipeline is connected onto the second pressure regulating valve, and a second emptying pipeline is connected onto the first safety valve. The first temperature sensor is used for ensuring the temperature of the outlet of the first gasifier to be stable, and when oxygen in the oxygen pipe network is low in temperature, the system cuts off the first pressure regulating valve. The flow sensor can control the first pressure sensor to adjust the pressure of the oxygen pipe network. When the oxygen consumption of the downstream chemical device is reduced, the first pressure regulating valve acts to ensure the stable pressure of the oxygen pipe network.
Preferably, the outlet of the buffer tank is connected with a check valve. When the liquid oxygen pump group stops working and before the pressure stabilizing system is started, the check valve can ensure that the oxygen cannot flow back to the upstream because the downstream pressure of the check valve is higher than the upstream pressure.
Preferably, the liquid oxygen pump is centrifugal or reciprocating. In particular, different types of liquid oxygen pumps can be adopted according to the oxygen flow and pressure required by the downstream chemical plant.
Preferably, the motor of the liquid oxygen pump is provided with a frequency converter. The frequency converter can realize the stable adjustment of the liquid oxygen flow.
Preferably, the pressure stabilizing system comprises a liquid oxygen pressure stabilizing pump, a second gasifier and an oxygen pressure stabilizing tank which are connected in sequence.
Preferably, a second temperature sensor and a second safety valve are arranged on a pipeline between the outlet of the second gasifier and the inlet of the oxygen pressure stabilizing tank, a third vent pipeline is connected to the second safety valve, a third pressure regulating valve is connected to the outlet of the oxygen pressure stabilizing tank, a second pressure sensor and a third safety valve are sequentially connected to the third pressure regulating valve, a fourth vent pipeline is connected to the third safety valve, and a third pressure sensor is connected to the oxygen pressure stabilizing tank; the motor of the liquid oxygen pressure stabilizing pump is provided with a frequency converter and is connected with a diesel generator. In normal operation, the third pressure regulating valve remains closed. Liquid oxygen from the liquid oxygen storage tank is pressurized to required pressure by a liquid oxygen pressure stabilizing pump and then enters a second gasifier, and the liquid oxygen is changed into high-pressure oxygen after passing through the second gasifier and enters an oxygen pressure stabilizing tank. The second temperature sensor connected with the outlet of the second gasifier is used for ensuring the temperature of the outlet of the second gasifier to be stable, and when the oxygen in the outlet pipeline of the second gasifier is at low temperature, the liquid oxygen pressure stabilizing pump is interlocked and stopped. The second safety valve can ensure the safety of the oxygen pressure stabilizing tank. The second pressure sensor is used for detecting the pressure of the oxygen pipe network, and when the pressure of the oxygen pipe network is low, the third pressure regulating valve is opened to stabilize the pressure of the oxygen pipe network. The third safety valve can prevent the damage of equipment and pipelines caused by the fact that high-pressure oxygen enters the oxygen pipe network due to the fault of the third pressure regulating valve. The motor of the liquid oxygen pressure stabilizing pump is connected with the diesel generator, so that the liquid oxygen pressure stabilizing pump can work normally under the power-off accident, and the continuous supply of oxygen to downstream chemical devices is ensured.
Further, the first gasifier and the second gasifier are water bath type gasifiers or air bath type gasifiers. The first gasifier and the second gasifier can adopt different types according to the oxygen flow and the actual situation.
Preferably, the liquid oxygen storage tank is a vacuum storage tank or a flat-bottom storage tank.
Compared with the prior art, the utility model has the advantages of as follows: the utility model discloses a continuous stable oxygen system can realize continuous, the steady supply to low reaches chemical plant oxygen, and the pressure stability, the safe and reliable of its oxygen pipe network can avoid stopping the great economic loss that causes because of the low reaches chemical plant that the oxygen supply interrupt arouses. The system can be used as an independent system for supplying oxygen to a downstream chemical plant and can also be used as a backup system of an air separation plant, and the system is automatically started when the air separation plant stops.
Drawings
FIG. 1 is a schematic view showing the structural connection of a continuous stable oxygen supply system in example 1.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The continuous stable oxygen supply system of embodiment 1, as shown in fig. 1, includes a liquid oxygen storage tank 1 for storing liquid oxygen, a liquid oxygen pump set for pressurizing liquid oxygen, a gasification device for heating and gasifying liquid oxygen, a buffer tank 3 for ensuring stable oxygen pressure, and a pressure stabilizing system, in this embodiment, the liquid oxygen storage tank 1 is a flat-bottom storage tank, an inlet of the liquid oxygen pump set and an inlet of the pressure stabilizing system are respectively connected with an outlet of the liquid oxygen storage tank 1, the liquid oxygen pump set, the gasification device, and the buffer tank 3 are sequentially connected to form an oxygen pipe network, an outlet of the buffer tank 3 is connected with an outlet of the pressure stabilizing system, and the pressure of the pressure stabilizing system is higher than the pressure of the oxygen pipe network.
In the embodiment 1, the liquid oxygen pump group comprises two liquid oxygen pumps 2 which are arranged in parallel, in the embodiment, the liquid oxygen pumps 2 are centrifugal pumps, a motor (not shown in the figure) of the liquid oxygen pumps 2 is provided with a frequency converter, and the motor is connected with a diesel generator; the gasification equipment comprises two first gasifiers 21 which are arranged in parallel, wherein the first gasifiers 21 are air bath gasifiers. The outlet of the liquid oxygen pump set is connected with a first pressure regulating valve 51, a first temperature sensor 52, a first pressure sensor 53, a flow sensor 54, a second pressure regulating valve 55 and a first safety valve 56 are arranged on a pipeline between the outlet of the gasification equipment and the inlet of the buffer tank 3, a first emptying pipeline 57 is connected onto the second pressure regulating valve 55, a second emptying pipeline 58 is connected onto the first safety valve 56, and the outlet of the buffer tank 3 is connected with a check valve 31.
In embodiment 1, the pressure stabilizing system includes a liquid oxygen pressure stabilizing pump 41, a second vaporizer 42, and an oxygen pressure stabilizing tank 43, which are connected in sequence, and the second vaporizer 42 is an air bath vaporizer. A second temperature sensor 61 and a second safety valve 62 are arranged on a pipeline between the outlet of the second gasifier 42 and the inlet of the oxygen pressure stabilizing tank 43, a third emptying pipeline 63 is connected to the second safety valve 62, a third pressure regulating valve 64 is connected to the outlet of the oxygen pressure stabilizing tank 43, a second pressure sensor 65 and a third safety valve 66 are sequentially connected to the third pressure regulating valve 64, a fourth emptying pipeline 67 is connected to the third safety valve 66, and a third pressure sensor 68 is connected to the oxygen pressure stabilizing tank 43.
In the embodiment, the first vent pipe 57, the second vent pipe 58, the third vent pipe 63 and the fourth vent pipe 67 cooperate with corresponding valves to form an automatic pressure relief system, so that overpressure of the oxygen pipe network can be avoided.
The continuous stable oxygen supply system of example 2 differs from that of example 1 in that in example 2, a vacuum tank is used as the liquid oxygen tank 1, a reciprocating pump is used as the liquid oxygen pump 2, and air bath type vaporizers are used as the first vaporizer 21 and the second vaporizer 42.
When the oxygen supply system works, the temperature of liquid oxygen from the liquid oxygen storage tank 1 is about-193 ℃, the pressure is micro-positive pressure, the liquid oxygen is pressurized to the required pressure through the liquid oxygen pump set and then enters the gasification equipment, the liquid oxygen is subjected to sufficient heat exchange with the outside in the gasification equipment, and the liquid oxygen is changed into high-pressure oxygen and enters the buffer tank 3. The liquid oxygen in the liquid oxygen storage tank 1 can be supplemented periodically according to the downstream oxygen consumption, and can also be supplemented continuously with small flow. The liquid oxygen pump set can meet the requirement of a downstream chemical device on higher pressure of oxygen, and the pressure stabilizing system can effectively ensure continuous and stable supply of oxygen under normal operation and accident conditions.
Claims (10)
1. A continuous stable oxygen supply system is characterized by comprising a liquid oxygen storage tank for storing liquid oxygen, a liquid oxygen pump set for pressurizing the liquid oxygen, gasification equipment for heating and gasifying the liquid oxygen, a buffer tank for ensuring the oxygen pressure to be stable and a pressure stabilizing system, wherein an inlet of the liquid oxygen pump set and an inlet of the pressure stabilizing system are respectively connected with an outlet of the liquid oxygen storage tank, the liquid oxygen pump set, the gasification equipment and the buffer tank are sequentially connected to form an oxygen pipe network, an outlet of the buffer tank is connected with an outlet of the pressure stabilizing system, and the pressure of the pressure stabilizing system is higher than that of the oxygen pipe network.
2. The system of claim 1, wherein the liquid oxygen pump set comprises two liquid oxygen pumps connected in parallel, and the vaporizer comprises two first vaporizers connected in parallel.
3. The system of claim 2, wherein the outlet of the pump set is connected to a first pressure regulating valve, a first temperature sensor, a first pressure sensor, a flow sensor, a second pressure regulating valve and a first safety valve are disposed on a pipeline between the outlet of the gasification equipment and the inlet of the buffer tank, the second pressure regulating valve is connected to a first vent pipeline, and the first safety valve is connected to a second vent pipeline.
4. The system according to claim 2, wherein the outlet of the buffer tank is connected to a check valve.
5. The system of claim 2, wherein the liquid oxygen pump is centrifugal or reciprocating.
6. The system as claimed in claim 2, wherein the motor of the liquid oxygen pump has a frequency converter.
7. The system of claim 2, wherein the pressure stabilizing system comprises a liquid oxygen pressure stabilizing pump, a second vaporizer and an oxygen pressure stabilizing tank connected in sequence.
8. The system of claim 7, wherein a second temperature sensor and a second safety valve are disposed on a pipeline between the outlet of the second vaporizer and the inlet of the oxygen pressure-stabilizing tank, the second safety valve is connected to a third vent pipeline, the outlet of the oxygen pressure-stabilizing tank is connected to a third pressure-regulating valve, the third pressure-regulating valve is sequentially connected to a second pressure sensor and a third safety valve, the third safety valve is connected to a fourth vent pipeline, and the oxygen pressure-stabilizing tank is connected to a third pressure sensor; the motor of the liquid oxygen pressure stabilizing pump is provided with a frequency converter and is connected with a diesel generator.
9. The system of claim 7, wherein the first vaporizer and the second vaporizer are water bath vaporizers or air bath vaporizers.
10. The system of claim 7, wherein the liquid oxygen reservoir is a vacuum reservoir or a flat bottom reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920961108.5U CN210344994U (en) | 2019-06-25 | 2019-06-25 | Continuous stable oxygen system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920961108.5U CN210344994U (en) | 2019-06-25 | 2019-06-25 | Continuous stable oxygen system |
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| CN210344994U true CN210344994U (en) | 2020-04-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112337266A (en) * | 2020-11-26 | 2021-02-09 | 王全忠 | Large-scale system oxygen system of module combination formula |
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- 2019-06-25 CN CN201920961108.5U patent/CN210344994U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112337266A (en) * | 2020-11-26 | 2021-02-09 | 王全忠 | Large-scale system oxygen system of module combination formula |
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