CN203291709U - Device for treating waste gas of light oil storage tank - Google Patents
Device for treating waste gas of light oil storage tank Download PDFInfo
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- CN203291709U CN203291709U CN2012205414739U CN201220541473U CN203291709U CN 203291709 U CN203291709 U CN 203291709U CN 2012205414739 U CN2012205414739 U CN 2012205414739U CN 201220541473 U CN201220541473 U CN 201220541473U CN 203291709 U CN203291709 U CN 203291709U
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- storage tank
- gas
- waste gas
- gas holder
- boiler
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Abstract
The utility model discloses a device for treating waste gas of a light oil storage tank, which comprises a storage tank (2), a supergravity reactor (3), a gas holder (4) and a boiler (5), wherein a Na2S2O3 solution is contained in the supergravity reactor (3); the storage tank (2), the supergravity reactor (3), the gas holder (4) and the boiler (5) are sequentially connected; and the gas holder (4) is connected with the storage tank (2) and used for the nitrogen sealing of the storage tank (2). The device disclosed by the utility model solves the problems of pollution and waste caused by the waste gas of the light oil storage tank; and the deoxidized waste gas can return to the tank to replace nitrogen sealing and also can serve as a boiler fuel to save energy. The waste gas treated by the device can be conveyed back into the storage tank to replace nitrogen sealing, thereby saving the resources, improving the recovery rate of the waste gas and reducing the environmental pollution.
Description
Technical field
The utility model relates to a kind of controlling device of light oil tank waste gas, the controlling device of the waste gas that particularly produces from the condensate storage tank.
Background technology
Condensate refers to from gas condensate field or oil field association natural gas condensation liquid phase component out, claims again natural gasoline.Except containing hydro carbons, also contain a small amount of components such as sulfide in the tidal air that condensate produces.Its main component is the mixture of C5 to C11 hydro carbons, and contain on a small quantity hydro carbons and the impurity such as sulfur dioxide, thiophene-based, thio-alcohol, thioether class and polysulfide greater than C8, its cut is many, and volatility is good between 20 ℃～200 ℃, is the raw material of producing the solvent naphtha high-quality.
Generally adopt oil tank to store condensate at oil play, the condensate storage tank is when receiving oil product, because the oil tank gas body space is constantly compressed, the tank internal pressure is raise, while reaching certain pressure,, namely there is " the large breathing " phenomenon in the oil vapour pollution atmosphere by the emptying facility of tank deck is discharged.Condensate density is lower, belongs to light oil, and is volatile under normal pressure, and large breathing phenomenon is comparatively serious.If the tidal air that contains sulfide, oil gas of condensate storage tank, unprocessed direct discharging, both do not met national pollutant emission standard, pollutes the ambient atmosphere environment yet.
Contain sulfide in condensate, can cause certain corrosion to oil tank, form ferrous sulfide and other sulphur iron compounds.When containing oxygen in " tidal air " of ullage space, ferrous sulfide oxidation and spontaneous combustion phenomenon can occur in some cases, light fluid G﹠O product cause fire and blast.And the flash-point of condensate own is lower, has inflammable and explosive property, also easily produces static in storage and transport process, makes like this danger of condensate storage tank larger than conventional storage tank.For avoiding ferrous sulfide spontaneous combustion initiation fire and explosion accident in oil tank, present method has stable operation, makes blanketing with inert gas etc.For example (1) oil tank is connected with the low pressure gas pipe network, and oil tank low pressure gas when paying the oil operation enters oil tank, oil tank when operation in tank gas enter the low pressure gas pipe network, make the gas-phase space of oil tank remain at anaerobic state, like this, FeS can't spontaneous combustion.(2) " chemical industry equipment and management " the 43rd volume fourth phase in 2006 " spontaneous Burning in Sulfur Contained Oil Tank and the precautionary measures ", " Oil ﹠ Gas Storage " the 25th the 3rd phase of volume in 2006 " spontaneous Burning in Sulfur Contained Oil Tank mechanism and prevention technique research "; " harbour handling " the 6th phase in 2003 " storage tank nitrogen binds and waste gas recycling technology " etc. has been introduced nitrogen or steam or carbon dioxide has been used as oil tank inertia positive pressure protection gas; make gas-phase space in tank keep anaerobic state, prevent the FeS oxidation and spontaneous combustion.But method (1) specification requirement is higher, and management expectancy is strict, requires storage tank to use at (approximately more than 0.3 MPa) under higher pressure, and existing storage tank can not directly be applied.Method (2) is although operate being bordering under normal pressure, and operating cost is higher, for example, and certain 1m of enterprise
3The cost of nitrogen approximately needs 1 yuan; And while using the water vapour protection, the also generation of easy accelerated cure ferrous iron.
CN200910188102.X discloses a kind of purification method of sulfur-containing organic waste gas, at first waste gas carry out the alkali liquid washing pretreatment, then the hydrogen sulfide that removes in waste gas wash by sump oil, remove wherein organic sulfur compound and hydrocarbon pollutant, carrying out finally catalytic combustion processes, thoroughly remove hydrocarbons pollutant wherein, make the waste gas qualified discharge.CN200810012686.0 discloses a kind of improvement method of release gas in storage tank area, condenser system and adsorption system are set, discharging waste gas is introduced into condenser system and reclaims condensate, then enter after adsorption system further removes pollutant and discharge, condensation method generally is used for reclaiming higher lighter hydrocarbons or the odorant pollutant of boiling point, and absorption method is to utilize the intrapore surface area absorption of adsorbent odorant.
But lower for sulfur content, gas componant can directly be utilized fully near the CONDENSATE OIL AND GAS of liquefied gas after simple process.And at present, the waste gas that condensate oilcan produces generally all adopts and directly discharges, the severe contamination surrounding environment, and caused the significant waste of resource.
The utility model content
The utility model proposes a kind of controlling device of light oil tank waste gas.Waste gas after this device is processed can be transmitted back to storage tank and replace the nitrogen envelope, and saving resource, improve the waste gas recovery utilization rate, environmental contamination reduction.
The controlling device of the utility model light oil tank waste gas, comprise storage tank (2), supergravity reactor (3), gas holder (4) and boiler (5), wherein in supergravity reactor (3), Na is housed
2S
2O
3Solution, storage tank (2), supergravity reactor (3), gas holder (4) are connected 5 with boiler) connect successively, gas holder (4) is connected with storage tank (2), is used for storage tank (2) nitrogen envelope.
In the utility model, the light oil tank waste gas tidal air that large breathing produces from the condensate storage tank.
In the utility model, the supergravity reactor of employing (3) comprises fire-proof motor, transmission mechanism, reactor shell and Gas-Liquid Dispersion unit, and absorption liquid is housed in reactor shell, and the exhaust-gas treatment amount is 4000Nm
3/ h.Absorption liquid in reactor shell is the hypo solution of 10wt%～30wt%, utilizes the strong reducing property of sodium thiosulfate to remove oxygen in waste gas, realizes that oxygen concentration is lower than 1.0v%.Can add a small amount of sodium carbonate to keep its concentration stabilize in hypo solution.During due to volatilization loss, supplementing water or absorption liquid, make absorption liquid maintain certain liquid level level when absorption liquid.The operation principle of supergravity reactor is that the Gas-Liquid Dispersion unit is under motor drives, rely on the secondary splitting of high speed centrifugation liquid stream and the broken bubble of stator rectification mechanism, with gas sucting reaction device and gas is divided into microbubble is dispersed in liquid, make between gas-liquid two-phase quick mass transfer and chemical reaction occur, pollutant in gas by liquid trap, absorb and react, after processing, gas is discharged from the reactor head exhaust outlet.On treatment effect, take liquid as continuous phase, gas contacts with uniform liquid with the microbubble form, and liquid forced circulation in reactor, and the gas-liquid contact area is large, and boundary upgrades fast, has improved mass transfer velocity, purification efficiency.Simple to operate, equipment operation revolution, amount of air entrainment, system pressure all can be adjusted manually or automatically by frequency-changing control system, can adapt to tolerance and change, and reach steady working condition and energy-conservation purpose.
When avoiding gas chilled in storage tank " large breathe " or tank, anxious thermal change, the large-minded changes in amplitude of discharging gas causes great impact to the stable operation of nitrogen envelope system or boiler, gas holder in the utility model (4) adopts dry type low pressure gas holder as buffering, and the gas holder total measurement (volume) is 5000m3.Gas holder (4) is provided with oxygen conten analyser, and the content of oxygen in waste gas after Real-Time Monitoring is processed, guarantee that oxygen content is lower than 1.0v%,, higher than when setting value, automatically start safety interlock system when oxygen content, waste gas stops carrying to storage tank and boiler, discharging directly into atmosphere, guarantee safety.Gas holder goes out throughput lower than charge flow rate, and the each tinning of storage tank produces like this calls out waste suction gas and can stably be delivered to storage tank or boiler through the buffering of gas holder, the impact that the fluctuation of having avoided tolerance brings to storage tank nitrogen envelope system and boiler.The basic expense of dry type low pressure gas holder is low, takes up an area less, and operational management and easy to maintenance, maintenance cost is low, without large amount of sewage, produces, and gas pressure is stable, and the life-span is 30 years.
The utility model has solved pollution and the waste problem of light oil tank waste gas, and deoxidation waste gas can return in tank and replace the nitrogen envelope, also can serve as boiler oil and save the energy.Supergravity reactor can improve mass-transfer efficiency greatly, efficiently removes the O in waste gas
2, assurance device safety; Gas holder can be avoided the impact of tolerance variation on nitrogen envelope and boiler, has guaranteed the stable of single unit system; Boiler burns waste gas is farthest utilized, for enterprise has created certain economic interests.
Description of drawings
Fig. 1 is a kind of concrete process chart of the utility model.
Wherein: 1-nitrogen system, 2-storage tank, 3-supergravity reactor, 4-gas holder, 5-boiler.
The specific embodiment
Light oil tank waste gas treatment device of the present utility model comprises supergravity reactor, gas holder and boiler, its flow process is: storage tank 2 is in fill process, the tank internal pressure raises, while reaching setting value (lower than the opening pressure of breather valve), voltage-controlled valve on bleed air lines is opened, and the waste gas that the large breathing of storage tank produces is discharged through bleed air lines.Meanwhile, supergravity reactor 3(or set of reactors) start, with the waste gas pressurized delivered that produces to gas holder 4.Supergravity reactor can be one, can be also a group reaction device (as three reactor parallel connections).Na is housed in supergravity reactor
2S
2O
3Solution, for the O that removes waste gas
2, reduce the oxygen content in waste gas, assurance device safety.Enter gas holder after the waste gas deoxidation, the pressure of gas holder raises gradually, and when the pressure of gas holder reached setting value, gas cabinet outlet led to the control valve unlatching of nitrogen system 1, original nitrogen pipeline valve closing, and deoxidation waste gas place of nitrogen, the nitrogen that is used for storage tank seals.If be used for the air inflow of the exhaust gas flow of nitrogen envelope well below gas holder, the pressure of gas holder can further raise; When the pressure of gas holder reached another setting value, gas cabinet outlet went the pipeline valve of boiler 5 to open, and a part of waste gas is delivered to existing boiler, does burning disposal.
Further illustrate the utility model below in conjunction with example, but be not limited to protection domain of the present utility model.In the utility model, wt% is mass fraction, and v% is volume fraction.
Embodiment 1
Certain oil depot, be responsible for the unloading of condensate, storage and the defeated work of changing a job.The condensate storage tank has two, and volume is 100000m3 altogether.The maximum stream flow of at every turn unloading a ship can reach 3000～4000m3/h, and average out to 3224.7m3/h unloads approximately 31h of disc despatch at every turn.Tidal air medium sulphide content concentration is higher, is mainly wherein isopropyl mercaptan and propanethiol, and the total hydrocarbon concentration of waste gas is up to more than 100 ten thousand mg/m
3After the supergravity reactor deoxygenation, oxygen content is lower than 1.0v%, and the tidal air major part is returned to the condensate storage tank and replaced the nitrogen envelope, reduces nitrogen use level.Unnecessary waste gas is delivered to boiler and is burned, and the completing combustion of 1mol waste gas can produce the heat of 1854kJ, 3224.7Nm
3The waste gas of/h can produce 2.67 * 10
8The heat of kJ/h, close 6.40 * 10
7Kcal/h., if heat 100% utilizes, can produce 10kg/cm
2Water vapour 100.7t/h(the water of 50 ℃ is become 180 ℃, 10kg/cm
2Water vapour).The water vapour price is calculated according to 85 yuan/t, unloads a ship per month 2 times, continues 31h at every turn, and the water vapour expense of a year is 636.8 ten thousand yuan.Through administering, the tank field foul smell is eliminated, and total hydrocarbon concentration drops to 100mg/m
3Below, after burning, sulfur dioxide, less than 0.03v%, meets discharging standards, and has created certain economic interests for enterprise.
Certain crude oil terminal in oil product is unloaded a ship process the oil gas total hydrocarbon concentration up to 1,300,000 mg/m
3, waste gas is after the supergravity reactor deoxygenation, and oxygen content is lower than 1.0v%, and the part tidal air is back to crude oil storage tank and replaces the nitrogen envelope, and unnecessary waste gas is delivered to existing boiler and is burned.The oil gas of once unloading a ship burns can produce 1.72 * 10
9The heat of kJ/h,, if heat 100% utilizes, can produce 10kg/cm
2Water vapour 666.8t/h, producing the water vapour expense is 1,020,000 yuan.In this, annual steam expense can reach tens million of units.This shows, the oil gas that oil product is unloaded a ship in process is administered, not only can save nitrogen, can also save boiler oil, is that enterprise creates certain economic benefit.
Claims (4)
1. the controlling device of a light oil tank waste gas, comprise storage tank (2), supergravity reactor (3), gas holder (4) and boiler (5), wherein in supergravity reactor (3), Na is housed
2S
2O
3Solution, storage tank (2), supergravity reactor (3), gas holder (4) are connected 5 with boiler) connect successively, gas holder (4) is connected with storage tank (2), is used for storage tank (2) nitrogen envelope.
2., according to device claimed in claim 1, it is characterized in that: the supergravity reactor of employing (3) comprises fire-proof motor, transmission mechanism, reactor shell and Gas-Liquid Dispersion unit.
3., according to device claimed in claim 1, it is characterized in that: the gas holder of employing (4) is dry type low pressure gas holder, and the gas holder total measurement (volume) is 5000m3.
4., according to the described device of claim 1 or 3, it is characterized in that: gas holder (4) is provided with oxygen conten analyser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205414739U CN203291709U (en) | 2012-10-23 | 2012-10-23 | Device for treating waste gas of light oil storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205414739U CN203291709U (en) | 2012-10-23 | 2012-10-23 | Device for treating waste gas of light oil storage tank |
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| CN203291709U true CN203291709U (en) | 2013-11-20 |
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| CN2012205414739U Expired - Lifetime CN203291709U (en) | 2012-10-23 | 2012-10-23 | Device for treating waste gas of light oil storage tank |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105501684A (en) * | 2015-12-08 | 2016-04-20 | 金健米业股份有限公司 | Device and method for storing strong fragrant vegetable oil |
| CN108525460A (en) * | 2018-03-09 | 2018-09-14 | 庞泰环保工程（江苏）有限公司 | A kind of industrial tail gas mixed gas recovery method |
| CN109351116A (en) * | 2018-12-06 | 2019-02-19 | 江苏科威环保技术有限公司 | Closed oil storage tank gas disposal process unit |
| CN113559674A (en) * | 2021-09-27 | 2021-10-29 | 广州金鹏环保工程有限公司 | Flexible buffer adsorption purification zero-emission system and method |
-
2012
- 2012-10-23 CN CN2012205414739U patent/CN203291709U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105501684A (en) * | 2015-12-08 | 2016-04-20 | 金健米业股份有限公司 | Device and method for storing strong fragrant vegetable oil |
| CN108525460A (en) * | 2018-03-09 | 2018-09-14 | 庞泰环保工程（江苏）有限公司 | A kind of industrial tail gas mixed gas recovery method |
| CN109351116A (en) * | 2018-12-06 | 2019-02-19 | 江苏科威环保技术有限公司 | Closed oil storage tank gas disposal process unit |
| CN113559674A (en) * | 2021-09-27 | 2021-10-29 | 广州金鹏环保工程有限公司 | Flexible buffer adsorption purification zero-emission system and method |
| CN113559674B (en) * | 2021-09-27 | 2022-06-28 | 广州金鹏环保工程有限公司 | Flexible buffer adsorption purification zero-emission system and method |
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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: 20131120 |