CN107472739A - A kind of storage tank nitrogen seals system - Google Patents

A kind of storage tank nitrogen seals system Download PDF

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Publication number
CN107472739A
CN107472739A CN201710702470.6A CN201710702470A CN107472739A CN 107472739 A CN107472739 A CN 107472739A CN 201710702470 A CN201710702470 A CN 201710702470A CN 107472739 A CN107472739 A CN 107472739A
Authority
CN
China
Prior art keywords
storage tank
liquid seal
nitrogen
pipeline
liquid
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.)
Withdrawn
Application number
CN201710702470.6A
Other languages
Chinese (zh)
Inventor
庞博湛
王利军
杨继伟
熊昌武
孙东辉
叶强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lian Long (central Defender) New Material Co Ltd
RIANLON Corp
Original Assignee
Lian Long (central Defender) New Material Co Ltd
RIANLON Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lian Long (central Defender) New Material Co Ltd, RIANLON Corp filed Critical Lian Long (central Defender) New Material Co Ltd
Priority to CN201710702470.6A priority Critical patent/CN107472739A/en
Publication of CN107472739A publication Critical patent/CN107472739A/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00Component parts, details or accessories for large containers
    • B65D90/22Safety features
    • B65D90/38Means for reducing the vapour space or for reducing the formation of vapour within containers
    • B65D90/44Means for reducing the vapour space or for reducing the formation of vapour within containers by use of inert gas for filling space above liquid or between contents

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

The invention provides a kind of storage tank nitrogen envelope system, including storage tank, nitrogen envelope valve and liquid seal device, the upper end of storage tank is sealed valve by nitrogen and connected with nitrogen pipeline, and storage tank is operated by liquid seal device and emptying pipeline communication, storage tank without input and output material, during pressure stability, liquid seal device and nitrogen envelope valve keep the slight positive pressure state in storage tank, and storage tank has an input and output material operation, during pressure change, the pressure sealed by liquid seal device and nitrogen in valve regulation storage tank, keeps slight positive pressure state in tank.The invention is substituted in existing nitrogen envelope system using liquid seal device lets out nitrogen valve and breather valve, it is possible to reduce the loss of nitrogen and material, while liquid seal device does not have to safeguard substantially, greatly reduces the maintenance cost of nitrogen envelope system equipment.

Description

A kind of storage tank nitrogen seals system
Technical field
The invention belongs to the nitrogen encapsulation technique field of Storage Tanks Combustible Liquid, and system is sealed more particularly, to a kind of storage tank nitrogen.
Background technology
The storage tank of chemical plant storage flammable liquid is used as protective gas frequently with nitrogen, to avoid storage material and air In oxygen contact to form explosive mixture, and fire risk.Nitrogen encapsulation method is using nitrogen envelope valve, lets out nitrogen valve, breathing Valve group into nitrogen envelope system (as shown in Figure 1), make storage tank charging, discharge and without operation during, remain it is certain just Pressure, prevent air from entering in storage tank.
To there is breather valve sealing in conventional nitrogen envelope system bad in actual use, causes storage tank nitrogen when without operation The problem of gas can be spilt from breather valve, on the one hand can cause the increase of nitrogen consumption, and another aspect nitrogen meeting entrainment expects row Empty and exhaust treatment system, so as to increase loss of material and VOC emission.In addition, nitrogen seals valve, lets out three equipment of nitrogen valve and breather valve Maintenance and maintenance workload are also bigger.
The content of the invention
In view of this, the invention is directed to a kind of storage tank nitrogen envelope system, to solve above-mentioned technical problem.
To reach above-mentioned purpose, what the technical scheme of the invention was realized in:
A kind of storage tank nitrogen seals system, including storage tank, nitrogen envelope valve and liquid seal device, and valve and nitrogen are sealed in the upper end of storage tank by nitrogen Pipeline communication, by liquid seal device and emptying pipeline communication, storage tank operates storage tank without input and output material, during pressure stability, liquid seal device The slight positive pressure state in storage tank is kept with nitrogen envelope valve, storage tank has an input and output material operation, during pressure change, passes through liquid seal device and nitrogen seals Pressure in valve regulation storage tank, keep slight positive pressure state in tank.Further, the liquid seal device includes surge tank and fluid-tight Tank, the first air inlet and the first gas outlet are provided with surge tank, the second air inlet and the second gas outlet are provided with liquid seal can, Storage tank is connected by pipeline with the first air inlet, and the first gas outlet is connected by pipeline with the second air inlet, the second gas outlet with Pipeline communication is emptied, is provided with sealing liquid in liquid seal can, the pipeline being connected with the second air inlet is extend into liquid seal can and its port Below the liquid level of sealing liquid.
Further, storage tank is connected by the first pipeline with the first air inlet, one end of the first pipeline and the first air inlet Grafting, the first gas outlet and the second air inlet are by the second pipeline connection, one end of the second pipeline and the first gas outlet grafting, and the The other end of two pipelines is extend into below the sealing liquid liquid level in liquid seal can, and the second gas outlet passes through the 3rd pipeline with emptying pipeline Connection, the 3rd pipeline and the second gas outlet grafting.
Further, it is respectively arranged with glass visor on surge tank and liquid seal can.
Further, the glass visor is separately positioned on the middle part of surge tank and liquid seal can, and the liquid level of sealing liquid is located at glass At glass visor.
Further, sealing liquid is provided with the liquid seal device, the sealing liquid is glycol water.
Further, the liquid seal device includes surge tank and liquid seal can, and the upper end of liquid seal can is provided with fluid infusion, buffering The lower end side portion of tank and liquid seal can is respectively arranged with drain.
Further, the upper end of storage tank is connected with liquid seal device.
Further, the upper end of storage tank is provided with charging aperture, and the lower end sidepiece of storage tank is provided with discharging opening.
Further, it is also respectively provided with storage tank and connected pipeline and some is used for displays temperature, flow, pressure The instrument of parameter.
Relative to prior art, a kind of storage tank nitrogen envelope system described in the invention has the advantage that:
(1) the invention is substituted in existing nitrogen envelope system using liquid seal device lets out nitrogen valve and breather valve, it is possible to reduce The loss of nitrogen and material, while liquid seal device does not have to safeguard substantially, greatly reduces the maintenance cost of nitrogen envelope system equipment;
(2) liquid seal device of the invention is simple in construction, ingenious in design, and liquid seal device can maintain the pressure in storage tank Stablize, while the pressure change hour in storage tank can also adjust the pressure in storage tank, prevent storage tank from being deformed because of negative pressure;
(3) the first air inlet of surge tank and liquid seal can, the first gas outlet, the second air inlet, second in the invention Gas outlet is separately positioned on the upper end of surge tank and liquid seal can, and this set make it that the reaction of liquid seal device is more sensitive, delays The setting for rushing tank is also prevented from sealing liquid suck-back and enters storage tank;
(4) glass visor is respectively arranged with surge tank and liquid seal can in the invention, glass visor is easy to work people Sealing liquid situation in member's observation surge tank and liquid seal can, the convenient liquid level adjusted in liquid seal can, by the liquid for adjusting sealing liquid Highly realize the fluid-tight pressure of regulation liquid seal device in face;
(5) sealing liquid in the invention uses glycol water, and glycol water is antifreeze in the winter time;
(6) storage tank in the invention is provided with fluid infusion and drain, is easy to adjust the fluid-tight pressure of liquid seal device.
Brief description of the drawings
The accompanying drawing for forming the part of the invention is used for providing further understanding the invention, present invention wound The schematic description and description made is used to explain the invention, does not form the improper restriction to the invention. In accompanying drawing:
Fig. 1 is that nitrogen of the prior art seals system flow chart;
Fig. 2 is the flow chart of the invention embodiment;
Fig. 3 is the structural representation of the liquid seal device described in the invention embodiment.
Description of reference numerals:
1st, storage tank;101st, charging aperture;102nd, discharging opening;2nd, liquid seal device;21st, surge tank;211st, the first air inlet;212、 First gas outlet;22nd, liquid seal can;221st, the second air inlet;222nd, the second gas outlet;223rd, sealing liquid;224th, fluid infusion;225th, put Net mouth;23rd, the first pipeline;24th, the second pipeline;25th, the 3rd pipeline;3rd, nitrogen envelope valve;4th, nitrogen pipeline;5th, pipeline is emptied;6th, exhale Inhale valve;7th, nitrogen valve is let out;8th, delivery pump;A, glass visor.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the invention can To be mutually combined.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ", The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are Based on orientation shown in the drawings or position relationship, it is for only for ease of description the invention and simplifies description, rather than instruction Or imply that signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that For the limitation to the invention.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that instruction Or imply relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined Feature can express or implicitly include one or more this feature.In the description of the invention, unless separately It is described, " multiple " are meant that two or more.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in the description of the invention Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection;Can be mechanical connection or electrical connection;Can be joined directly together, can also be indirectly connected by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, on being understood by concrete condition State concrete meaning of the term in the invention.
Describe the invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 2,3, a kind of storage tank nitrogen envelope system includes storage tank 1, nitrogen seals valve 3 and liquid seal device 2, storage tank 1 pass through nitrogen Envelope valve 3 is connected with nitrogen pipeline 4.Liquid seal device 2 includes the surge tank 21 and liquid seal can 22 being arranged in series, surge tank 21 and fluid-tight The level height of tank 22 is identical, and the upper end of surge tank 21 is respectively arranged with the first air inlet 211 and the first gas outlet 212, fluid-tight The upper end of tank 22 is provided with the second air inlet 221 and the second gas outlet 222.The upper end of storage tank 1 passes through the first pipeline 23 and first Air inlet 211 connects, and one end and the grafting of the first air inlet 211 of the first pipeline 23, the other end and the storage tank 1 of the first pipeline 23 connect Connect.First gas outlet 212 is connected with the second air inlet 221 of liquid seal can 22 by the second pipeline 24, one end of the second pipeline 24 With the grafting of the first gas outlet 212, the other end of the second pipeline 24 extend into inside liquid seal can 22, is loaded with inside liquid seal can 22 Sealing liquid 223, the port for the second pipeline 24 extending into inside liquid seal can 22 are located at below the liquid level of sealing liquid 223.Second gas outlet 222 are connected by the 3rd pipeline 25 with emptying pipeline 5, and emptying pipeline 5 is with going exhaust treatment system to connect, and the one of the 3rd pipeline 25 End is connected with the second gas outlet 222, and the other end of the 3rd pipeline 25 connects with emptying pipeline 5.
As shown in Figure 2,3, nitrogen does not dissolve in sealing liquid 223, and sealing liquid 223 can select the liquid such as water, preferable the present embodiment Glycol water is selected, glycol water in the winter time can be with antifreeze.The middle part of surge tank 21 and liquid seal can 22 is provided with use In observation surge tank 21 and the glass visor a of the inner case of liquid seal can 22, the liquid level of sealing liquid 223 is located in the middle part of glass visor a.Stretch Enter to the port of the second pipeline 24 inside liquid seal can 22 to be located at glass visor a lower section.The upper end of liquid seal can 22 is provided with benefit The lower end side portion of liquid mouth 224, liquid seal can 22 and surge tank 21 is respectively arranged with drain 225.
As shown in Fig. 2 being preferable to provide two storage tanks 1 in the present embodiment, the number of storage tank 1 can be set according to demand Amount.The upper end of storage tank 1 is provided with the charging aperture 101 for charging, and the lower end sidepiece of storage tank 1 is provided with discharging opening 102, discharging opening 102 are connected with delivery pump 8, and delivery pump 8 is used to discharge.Some be used for is also respectively provided with storage tank 1 and connected pipeline Displays temperature, flow, the instrument of pressure and other parameters.
There is breather valve 6 and seal bad in conventional nitrogen envelope system, cause storage tank 1 when without operation in actual use Nitrogen can be spilt from breather valve 6, on the one hand cause the increase of nitrogen consumption, and another aspect nitrogen meeting entrainment expects emptying and tail Gas processing system increases loss of material and VOC emission.In addition nitrogen seals valve 3, lets out 6 three corrective maintenances of nitrogen valve 7 and breather valve and dimension It is also bigger to protect workload.
The operation principle of the invention:
No liquid in surge tank 21 during work, the first pipeline 23, the second pipeline 24 are not inserted into surge tank 21.Liquid seal can 22 Built with sealing liquid 223 (glycol water, for preventing freeze in winter), the second pipeline 24 inserts the liquid level of sealing liquid 223 in liquid seal can 22 Hereinafter, the 3rd pipeline 25 is not inserted into tank.Pressure caused by height liquid seal is higher than the nitrogen of the storage tank 1 envelope setting pressure of valve 3 during normal work Power, gas will not discharge from liquid seal device 2, so liquid seal device 2 can both maintain the slight positive pressure state of storage tank 1, will not make storage again Gas is discharged in tank 1.When storage tank 1 feeds or heated up, the pressure in storage tank 1 is higher than the fluid-tight pressure of liquid seal device 2, storage tank 1 Interior gas passes sequentially through surge tank 21 and liquid seal can 22, is discharged into emptying pipeline 5 from the 3rd pipeline 25, prevents storage tank from 1 surpassing Pressure.
When storage tank 1 discharge or when the temperature drops, nitrogen envelope valve 3 can open, nitrogen enter storage tank 1 maintain storage tank 1 in pressure.When The nitrogen envelope failure of valve 3 be when can not open, and the pressure in storage tank 1 is less than the fluid-tight pressure in liquid seal device 2, the sealing liquid in liquid seal can 22 223 can enter surge tank 21 by the second pipeline 24, and until liquid level is exposed in the lower end of the second pipeline 24, now storage tank 1 is with emptying The UNICOM of pipeline 5, the pressure in storage tank 1 can be balanced, and prevent storage tank 1 from being deformed because of negative pressure.The fluid-tight pressure of storage tank 1 can be with Adjusted by the liquid level height of sealing liquid 223, surge tank 21, liquid seal can 22 are furnished with glass visor a, can pass through glass visor a Observe and then adjust liquid level.
The invention replaces letting out the effect of nitrogen valve 7 and breather valve 6 using liquid seal device 2, because nitrogen does not dissolve in liquid Sealing liquid 223 in sealed cans 22, so when storage tank 1 is without operation, nitrogen will not leak, and can maintain the pressure stability in storage tank 1, Reduce the loss of nitrogen and material.And compared with letting out nitrogen valve 7 and breather valve 6, liquid seal device 2 does not have to safeguard substantially, drops significantly The maintenance cost of low nitrogen envelope system equipment.
The preferred embodiment of the invention is the foregoing is only, is not intended to limit the invention creation, it is all at this Within the spirit and principle of innovation and creation, any modification, equivalent substitution and improvements made etc., the invention should be included in Protection domain within.

Claims (10)

1. a kind of storage tank nitrogen seals system, it is characterised in that:Including storage tank (1), nitrogen envelope valve (3) and liquid seal device (2), storage tank (1) Upper end valve (3) sealed by nitrogen connected with nitrogen pipeline (4), storage tank (1) is connected by liquid seal device (2) with emptying pipeline (5), When storage tank (1) interior pressure is constant, liquid seal device (2) keeps the slight positive pressure state in storage tank (1), the pressure change in storage tank (1) When, the pressure in storage tank (1) is adjusted by liquid seal device (2) and nitrogen envelope valve (3).
2. storage tank nitrogen according to claim 1 seals system, it is characterised in that:The liquid seal device (2) includes surge tank (21) the first air inlet (211) and the first gas outlet (212), liquid seal can and liquid seal can (22), are provided with surge tank (21) (22) the second air inlet (221) and the second gas outlet (222) are provided with, storage tank (1) passes through pipeline and the first air inlet (211) Connection, the first gas outlet (212) are connected by pipeline with the second air inlet (221), the second gas outlet (222) and emptying pipeline (5) connect, be provided with sealing liquid (223) in liquid seal can (22), the pipeline being connected with the second air inlet (221) extend into liquid seal can (22) in and its port is located at below the liquid level of sealing liquid (223).
3. storage tank nitrogen according to claim 2 seals system, it is characterised in that:Storage tank (1) passes through the first pipeline (23) and the One air inlet (211) connects, one end of the first pipeline (23) and the first air inlet (211) grafting, the first gas outlet (212) and the Two air inlets (221) are connected by the second pipeline (24), one end and the first gas outlet (212) grafting of the second pipeline (24), the The other end of two pipelines (24) is extend into below sealing liquid (223) liquid level in liquid seal can (22), the second gas outlet (222) and row Vacant duct (5) is connected by the 3rd pipeline (25), the 3rd pipeline (25) and the second gas outlet (222) grafting.
4. storage tank nitrogen according to claim 2 seals system, it is characterised in that:On surge tank (21) and liquid seal can (22) respectively It is provided with glass visor (a).
5. storage tank nitrogen according to claim 4 seals system, it is characterised in that:The glass visor (a) is separately positioned on slow The middle part of tank (21) and liquid seal can (22) is rushed, the liquid level of sealing liquid (223) is located at glass visor (a) place.
6. storage tank nitrogen according to claim 1 seals system, it is characterised in that:Sealing liquid is provided with the liquid seal device (2) (223), the sealing liquid (223) is glycol water sealing liquid.
7. storage tank nitrogen according to claim 1 seals system, it is characterised in that:The liquid seal device (2) includes surge tank (21) and liquid seal can (22), the upper end of liquid seal can (22) is provided with fluid infusion (224), under surge tank (21) and liquid seal can (22) One end side portion is not provided with drain (225).
8. storage tank nitrogen according to claim 1 seals system, it is characterised in that:The upper end of storage tank (1) connects with liquid seal device (2) Connect.
9. storage tank nitrogen according to claim 1 seals system, it is characterised in that:The upper end of storage tank (1) is provided with charging aperture (101), the lower end sidepiece of storage tank (1) is provided with discharging opening (102).
10. storage tank nitrogen according to claim 1 seals system, it is characterised in that:On storage tank (1) and connected pipeline also It is respectively arranged with some for displays temperature, flow, the instrument of pressure parameter.
CN201710702470.6A 2017-08-16 2017-08-16 A kind of storage tank nitrogen seals system Withdrawn CN107472739A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109931503A (en) * 2019-04-19 2019-06-25 山东科源化工有限公司 A kind of autonomous type nitrogen storage tank nitrogen protection device
CN110067937A (en) * 2019-05-21 2019-07-30 挪亚圣诺(太仓)生物科技有限公司 A kind of nitrogen-sealed system and sealing technology

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Publication number Priority date Publication date Assignee Title
CN86207251U (en) * 1986-09-26 1987-10-28 河北师范大学代用燃料研究所 Double liquid seal breather valve for tank
CN201604938U (en) * 2009-12-30 2010-10-13 贵阳铝镁设计研究院 Storage tank structure sealed by using inert gas
CN201703787U (en) * 2010-04-30 2011-01-12 青岛和兴精细化学有限公司 Automatic micropressure protector of storage tank
CN203525538U (en) * 2013-09-29 2014-04-09 青岛和兴精细化学有限公司 Device of absorbing industrial waste gases
CN203959058U (en) * 2014-07-25 2014-11-26 山东金城柯瑞化学有限公司 The nitrogen envelope of volatile organism material storage tank and water seal interlock mothballed plant
CN204201183U (en) * 2014-11-17 2015-03-11 九江力山环保科技有限公司 Inflammable gas burning Water seal of preventing flashback device
CN204872289U (en) * 2015-08-26 2015-12-16 成都杰晟蜀邦新材料科技有限公司 Storage tank liquid seal device
CN205203887U (en) * 2015-11-26 2016-05-04 昆山品青生物科技有限公司 Hydrochloric acid storage tank system
CN207090184U (en) * 2017-08-16 2018-03-13 天津利安隆新材料股份有限公司 A kind of storage tank nitrogen seals system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86207251U (en) * 1986-09-26 1987-10-28 河北师范大学代用燃料研究所 Double liquid seal breather valve for tank
CN201604938U (en) * 2009-12-30 2010-10-13 贵阳铝镁设计研究院 Storage tank structure sealed by using inert gas
CN201703787U (en) * 2010-04-30 2011-01-12 青岛和兴精细化学有限公司 Automatic micropressure protector of storage tank
CN203525538U (en) * 2013-09-29 2014-04-09 青岛和兴精细化学有限公司 Device of absorbing industrial waste gases
CN203959058U (en) * 2014-07-25 2014-11-26 山东金城柯瑞化学有限公司 The nitrogen envelope of volatile organism material storage tank and water seal interlock mothballed plant
CN204201183U (en) * 2014-11-17 2015-03-11 九江力山环保科技有限公司 Inflammable gas burning Water seal of preventing flashback device
CN204872289U (en) * 2015-08-26 2015-12-16 成都杰晟蜀邦新材料科技有限公司 Storage tank liquid seal device
CN205203887U (en) * 2015-11-26 2016-05-04 昆山品青生物科技有限公司 Hydrochloric acid storage tank system
CN207090184U (en) * 2017-08-16 2018-03-13 天津利安隆新材料股份有限公司 A kind of storage tank nitrogen seals system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109931503A (en) * 2019-04-19 2019-06-25 山东科源化工有限公司 A kind of autonomous type nitrogen storage tank nitrogen protection device
CN109931503B (en) * 2019-04-19 2024-04-26 山东科源化工有限公司 Autonomous nitrogen protection device for nitrogen storage tank
CN110067937A (en) * 2019-05-21 2019-07-30 挪亚圣诺(太仓)生物科技有限公司 A kind of nitrogen-sealed system and sealing technology

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