CN203099332U - Liquid nitrogen system nitrogen recovery device - Google Patents
Liquid nitrogen system nitrogen recovery device Download PDFInfo
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- CN203099332U CN203099332U CN 201320013754 CN201320013754U CN203099332U CN 203099332 U CN203099332 U CN 203099332U CN 201320013754 CN201320013754 CN 201320013754 CN 201320013754 U CN201320013754 U CN 201320013754U CN 203099332 U CN203099332 U CN 203099332U
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- storage tank
- valve
- liquid nitrogen
- nitrogen storage
- pipeline
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Abstract
The utility model discloses a liquid nitrogen system nitrogen recovery device which aims at overcoming the shortages that energy is wasted in the process of depressurization operation through an existing liquid nitrogen storage tank and the existing liquid nitrogen storage tank is short in service life and low in safety performance. The liquid nitrogen system nitrogen recovery device comprises a liquid nitrogen storage tank. A gas discharging valve is connected with the lower end of the liquid nitrogen storage tank. The gas discharging valve is connected with an adjusting valve through a pipeline. The adjusting valve is connected with a coarse nitrogen storage tank through a pipeline. The liquid nitrogen storage tank is connected with a pressure transmitter through a pipeline. The pressure transmitter is electrically connected with a controller. The controller is electrically connected with the adjusting valve and controls the adjusting valve. Nitrogen discharged in a depressurizing mode in the process of depressurization operation is recycled by the liquid nitrogen storage tank so that energy is saved. Nitrogen discharging depressurization is free of manual operation and an explosion valve of the liquid nitrogen storage tank is not needed for automatic nitrogen discharging depressurization so that the safety performance and the service life of the liquid nitrogen storage tank are increased.
Description
Technical field
The utility model relates to a kind of liquid nitrogen system, and more particularly, it relates to a kind of energy-conservation liquid nitrogen system nitrogen gas recovering apparatus.
Background technique
Liquid nitrogen storage tank uses very general in industrial production, but because local pipeline can't be built in the liquid nitrogen storage tank, do not needing to carry under the situation of using liquid nitrogen, outside heat is delivered in the local external pipeline, make liquid nitrogen have certain vaporization, the pressure of liquid nitrogen storage tank will raise, when reaching 8bar, the pressure in the liquid nitrogen storage tank just need carry out reduced pressure operation to it, method at present commonly used is exactly manually to discharge the nitrogen step-down or the explosive valve by liquid nitrogen storage tank self discharges the nitrogen step-down voluntarily, these two kinds of step-down modes waste energy on the one hand, escape cock and automatic explosive valve access times are many on the other hand, reduce working life, thereby reduce the Safety performance of whole liquid nitrogen storage tank.
Chinese patent notification number CN202442096U, a kind of liquid nitrogen storage tank is disclosed, comprise housing, be arranged at the inner container of enclosure interior and the vacuum warming layer between inner container and housing, housing is provided with the shell safety installations, vacuum pumping valve, vacuum gauge, inner container is provided with level meter, supply pipe, discharge nozzle, survey full valve and atmospheric valve, it also comprises internal supercharger, liquid extraction mouth and gas extraction mouth, internal supercharger one end is communicated with supply pipe, the other end is communicated with blow-down pipe, the liquid extraction mouth is communicated with the inner container bottom by pipeline, and the gas extraction mouth is communicated with the inner container top by pipeline.But this liquid nitrogen storage tank on-line continuous provides stable output quantity, and the medium parameter in the inner container obtains conveniently, be provided with safety valve, the Safety performance height, but also can there be the external situation of local pipeline in this liquid nitrogen storage tank, outside heat is delivered in the local external pipeline, make liquid nitrogen have certain vaporization, the pressure of liquid nitrogen storage tank will raise, need to adopt and manually to discharge the nitrogen step-down or the explosive valve by liquid nitrogen storage tank self discharges the nitrogen step-down voluntarily, nitrogen directly emits, and has wasted the energy, has reduced the working life and the Safety performance of liquid nitrogen storage tank.
The model utility content
The utility model has overcome existing liquid nitrogen storage tank to carry out reduced pressure operation and wastes energy, the working life of liquid nitrogen storage tank is short, the deficiency that Safety performance is low, a kind of liquid nitrogen system nitrogen gas recovering apparatus is provided, recycle at the nitrogen that liquid nitrogen storage tank carries out in the reduced pressure operation process step-down being given off, energy saving, and do not need manually to discharge the nitrogen step-down, do not need to discharge the nitrogen step-down voluntarily yet, increased the Safety performance and the working life of liquid nitrogen storage tank by the explosive valve of liquid nitrogen storage tank self.
In order to solve the problems of the technologies described above, the utility model is by the following technical solutions: a kind of liquid nitrogen system nitrogen gas recovering apparatus, comprise liquid nitrogen storage tank, the liquid nitrogen storage tank lower end is connected with gas emitting valve, gas emitting valve connects modulating valve by pipeline, and modulating valve connects thick nitrogen storage tank by pipeline, and liquid nitrogen storage tank connects pressure transmitter by pipeline, pressure transmitter is electrically connected controller, and controller is electrically connected modulating valve and regulating and controlling valve.
The purity of liquid nitrogen 〉=99.9995% in the liquid nitrogen storage tank, the pressure of liquid nitrogen are generally about 6bar, and purity 〉=99% of thick nitrogen in the thick nitrogen storage tank, the pressure of thick nitrogen is generally about 3bar.Original state, the gaseous emission opening of valves, modulating valve cuts out.Pressure transmitter detects the pressure in the liquid nitrogen storage tank constantly, and pressure signal is sent to controller handles, after the detected pressure force value default greater than controller, controller regulating and controlling valve is opened, elevated pressure nitrogen in the liquid nitrogen storage tank is transferred in the thick nitrogen storage tank through gas emitting valve and modulating valve, thereby the pressure in the reduction liquid nitrogen storage tank, and the nitrogen that gives off is collected in the thick nitrogen storage tank stand-by, energy saving.After pressure transmitter detected pressure in the liquid nitrogen storage tank and equals the default force value of controller, controller regulating and controlling valve cut out.By the opening and closing of controller regulating and controlling valve, guarantee the liquid nitrogen storage tank pressure stability.Recycle at the nitrogen that liquid nitrogen storage tank carries out in the reduced pressure operation process step-down being given off, energy saving, and do not need manually to discharge the nitrogen step-down, do not need to discharge the nitrogen step-down voluntarily yet, increased the Safety performance and the working life of liquid nitrogen storage tank by the explosive valve of liquid nitrogen storage tank self.
As preferably, connect pressure gauge on the liquid nitrogen storage tank, pressure gauge is arranged on the pipeline between pressure transmitter and the liquid nitrogen storage tank.Pressure gauge can read the force value in the liquid nitrogen storage tank intuitively, makes operation more flexible.
As preferably, controller is the PLC controller.The control of PLC controller is reliable and stable.
As preferably, be in series with first on the pipeline between gas emitting valve and the modulating valve and safeguard valve, be in series with second on the pipeline between modulating valve and the thick nitrogen storage tank and safeguard valve, first safeguards that valve and second safeguards that valve is all near modulating valve.When modulating valve occurs when unusual, close first and safeguard that valve and second safeguards valve and modulating valve is keeped in repair, first safeguards that valve and second safeguards that valve has cut off flowing of nitrogen in the pipeline, makes the maintenance of modulating valve convenient.
As preferably, be parallel with the plant maintenance valve on the gas emitting valve and first pipeline of safeguarding between the valve, an end of plant maintenance valve is connected on the pipeline, and the other end is unsettled.When needing the maintenance of discharging nitrogen when breaking down in the liquid nitrogen storage tank, open the plant maintenance valve, the nitrogen discharge in the liquid nitrogen storage tank is gone out, make things convenient for the repair and maintenance of liquid nitrogen storage tank.
As preferably, be in series with the reservation valve on second pipeline of safeguarding between valve and the thick nitrogen storage tank.Reserve the connection that valve cuts off pipeline and thick nitrogen storage tank, convenient thick nitrogen storage tank is connected miscellaneous equipment with the pipeline of reserving between the valve, uses flexibly.
As preferably, thick nitrogen storage tank is connected with the adsorption type nitrogen generator by pipeline.Be difficult to collect apace full nitrogen in the thick nitrogen storage tank, when needs use nitrogen in the thick nitrogen storage tank, and when nitrogen gas pressure does not reach usage requirement in the thick nitrogen storage tank, the adsorption type nitrogen generator is produced nitrogen and the nitrogen of producing is transported in the thick nitrogen storage tank, so that make thick nitrogen storage tank collect full nitrogen apace, make the use of thick nitrogen storage tank more flexible.
Compared with prior art, the beneficial effects of the utility model are: recycle at the nitrogen that liquid nitrogen storage tank carries out in the reduced pressure operation process step-down being given off (1), energy saving, and do not need manually to discharge the nitrogen step-down, do not need to discharge the nitrogen step-down voluntarily yet, increased the Safety performance and the working life of liquid nitrogen storage tank by the explosive valve of liquid nitrogen storage tank self; (2) the step-down process automation of liquid nitrogen storage tank is operated, and monitors the pressure in the liquid nitrogen storage tank constantly, and is simple to operation.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model;
Among the figure: 1, liquid nitrogen storage tank, 2, gas emitting valve, 3, modulating valve, 4, thick nitrogen storage tank, 5, pressure transmitter, 6, controller, 7, pressure gauge, 8, first safeguards valve, 9, second safeguard valve, 10, the plant maintenance valve, 11, reserve valve, 12, the adsorption type nitrogen generator.
Embodiment
Below by specific embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is further described specifically:
Embodiment: a kind of liquid nitrogen system nitrogen gas recovering apparatus (referring to accompanying drawing 1), comprise liquid nitrogen storage tank 1, liquid nitrogen storage tank connects vaporizer, and the liquid nitrogen storage tank lower end is connected with gas emitting valve 2, gas emitting valve connects modulating valve 3 by pipeline, and modulating valve connects thick nitrogen storage tank 4 by pipeline.Be in series with first on the pipeline between gas emitting valve and the modulating valve and safeguard valve 8, be in series with second on the pipeline between modulating valve and the thick nitrogen storage tank and safeguard that valve 9, the first safeguards that valve and second safeguards that valve is all near modulating valve.Be parallel with plant maintenance valve 10 on the gas emitting valve and first pipeline of safeguarding between the valve, an end of plant maintenance valve is connected on the pipeline, and the other end is unsettled.Be in series with on second pipeline of safeguarding between valve and the thick nitrogen storage tank and reserve valve 11.First safeguards that valve, second safeguards valve, plant maintenance valve, reserves valve and be ball valve.Liquid nitrogen storage tank connects pressure transmitter 5 by pipeline, pressure transmitter is electrically connected controller 6, controller is electrically connected modulating valve and regulating and controlling valve, and controller is the PLC controller, and the PLC controller receives the opening and closing from the signal and the regulating and controlling valve of pressure transmitter.Connect pressure gauge 7 on the liquid nitrogen storage tank, pressure gauge is arranged on the pipeline between pressure transmitter and the liquid nitrogen storage tank.Thick nitrogen storage tank is connected with adsorption type nitrogen generator 12 by pipeline.Be difficult to collect apace full nitrogen in the thick nitrogen storage tank, when needs use nitrogen in the thick nitrogen storage tank, and when nitrogen gas pressure does not reach usage requirement in the thick nitrogen storage tank, the adsorption type nitrogen generator is produced nitrogen and the nitrogen of producing is transported in the thick nitrogen storage tank, so that make thick nitrogen storage tank collect full nitrogen apace, make the use of thick nitrogen storage tank more flexible.
The purity of liquid nitrogen 〉=99.9995% in the liquid nitrogen storage tank, the pressure of liquid nitrogen are generally about 6bar, and purity 〉=99% of thick nitrogen in the thick nitrogen storage tank, the pressure of thick nitrogen is generally about 3bar.Original state, the gaseous emission opening of valves, modulating valve cuts out.Pressure transmitter detects the pressure in the liquid nitrogen storage tank constantly, and pressure signal is sent to controller handles, after the detected pressure force value default greater than controller, controller regulating and controlling valve is opened, elevated pressure nitrogen in the liquid nitrogen storage tank is transferred in the thick nitrogen storage tank through gas emitting valve and modulating valve, thereby the pressure in the reduction liquid nitrogen storage tank, and the nitrogen that gives off is collected in the thick nitrogen storage tank stand-by, energy saving.After pressure transmitter detected pressure in the liquid nitrogen storage tank and equals the default force value of controller, controller regulating and controlling valve cut out.By the opening and closing of controller regulating and controlling valve, guarantee the liquid nitrogen storage tank pressure stability.Recycle at the nitrogen that liquid nitrogen storage tank carries out in the reduced pressure operation process step-down being given off, energy saving, and do not need manually to discharge the nitrogen step-down, do not need to discharge the nitrogen step-down voluntarily yet, increased the Safety performance and the working life of liquid nitrogen storage tank by the explosive valve of liquid nitrogen storage tank self.
Above-described embodiment is a kind of preferable scheme of the present utility model, is not that the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technological scheme that claim puts down in writing.
Claims (7)
1. liquid nitrogen system nitrogen gas recovering apparatus, comprise liquid nitrogen storage tank (1), the liquid nitrogen storage tank lower end is connected with gas emitting valve (2), it is characterized in that, gas emitting valve connects modulating valve (3) by pipeline, and modulating valve connects thick nitrogen storage tank (4) by pipeline, and liquid nitrogen storage tank connects pressure transmitter (5) by pipeline, pressure transmitter is electrically connected controller (6), and controller is electrically connected modulating valve and regulating and controlling valve.
2. liquid nitrogen system nitrogen gas recovering apparatus according to claim 1 is characterized in that, connects pressure gauge (7) on the liquid nitrogen storage tank, and pressure gauge is arranged on the pipeline between pressure transmitter and the liquid nitrogen storage tank.
3. liquid nitrogen system nitrogen gas recovering apparatus according to claim 1 is characterized in that, controller is the PLC controller.
4. according to claim 1 or 2 or 3 described liquid nitrogen system nitrogen gas recovering apparatus, it is characterized in that, be in series with first on the pipeline between gas emitting valve and the modulating valve and safeguard valve (8), be in series with second on the pipeline between modulating valve and the thick nitrogen storage tank and safeguard valve (9), first safeguards that valve and second safeguards that valve is all near modulating valve.
5. liquid nitrogen system nitrogen gas recovering apparatus according to claim 4 is characterized in that, is parallel with plant maintenance valve (10) on the gas emitting valve and first pipeline of safeguarding between the valve, and an end of plant maintenance valve is connected on the pipeline, and the other end is unsettled.
6. liquid nitrogen system nitrogen gas recovering apparatus according to claim 4 is characterized in that, is in series with on second pipeline of safeguarding between valve and the thick nitrogen storage tank and reserves valve (11).
7. liquid nitrogen system nitrogen gas recovering apparatus according to claim 5 is characterized in that, thick nitrogen storage tank is connected with adsorption type nitrogen generator (12) by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320013754 CN203099332U (en) | 2013-01-10 | 2013-01-10 | Liquid nitrogen system nitrogen recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320013754 CN203099332U (en) | 2013-01-10 | 2013-01-10 | Liquid nitrogen system nitrogen recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203099332U true CN203099332U (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320013754 Expired - Lifetime CN203099332U (en) | 2013-01-10 | 2013-01-10 | Liquid nitrogen system nitrogen recovery device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203099332U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106237647A (en) * | 2016-09-08 | 2016-12-21 | 南京中特化工动力设备有限公司 | Single variety volatile organic work material storage tank nitrogen circulation material recovery process |
-
2013
- 2013-01-10 CN CN 201320013754 patent/CN203099332U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106237647A (en) * | 2016-09-08 | 2016-12-21 | 南京中特化工动力设备有限公司 | Single variety volatile organic work material storage tank nitrogen circulation material recovery process |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |