CN209386009U - The system for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption - Google Patents
The system for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption Download PDFInfo
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- CN209386009U CN209386009U CN201822094609.6U CN201822094609U CN209386009U CN 209386009 U CN209386009 U CN 209386009U CN 201822094609 U CN201822094609 U CN 201822094609U CN 209386009 U CN209386009 U CN 209386009U
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Abstract
The utility model discloses the systems for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption, pressure controller is selected including oil product storage tank, pressure calculator, blower, condenser, knockout drum and height, it is provided at the top of oil product storage tank and mends the gentle body outlet of nitrogen entrance, recycling entrance, gas vent is connect by pipeline with fans entrance, fan outlet is connect by pipeline with condenser inlet, and condensed gas is sent into knockout drum by condensator outlet by pipeline；Knockout drum bottom is provided with heavy constituent outlet, and light component escape orifice and emergency power mouth are provided at the top of knockout drum, and light component escape orifice is connect by pipeline with the recycling entrance being arranged at the top of oil product storage tank.Process device is simple, and selection is easy.Using blower and knockout drum, it is equipped with reasonable control pressurer system, the heavy constituent in VOCs can be collected in holding vessel in VOCs and be recycled, and light component is then used as inert gas to replace conventional nitrogen-sealed gas.
Description
Technical field
The utility model relates to oil storage and transportation, environmental protection and chemical process fields, especially reduction oil product storage tank VOCs discharge
The system of amount and sealing nitrogen consumption.
Background technique
VOCs collection processing is petrochemicals and the generally existing process of raw materials storage system, fill process discharge
VOCs mostly uses the processes such as cryogenic condensation recycling, activated carbon adsorption and heat-accumulation combustion to be handled at present；To prevent discharging process
Caused pressure of storage tank is too low, and nitrogen adjustment valve is usually arranged and carries out ftercompction to storage tank.
The prior art collects the existing main problem of processing to VOCs: first, conventional condensation recovery process needs low temperature
Medium；Second, sealing is big with nitrogen consumption；Third, cryogenic condensation cold source carry out source problem, are easy to appear process frosting；4th,
It is high that VOCs post-processes investment cost.
Utility model content
The purpose of the utility model is to provide the systems for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption,
Solve the inert gas of the collection of VOCs of petrochemical industry (including coal chemical industry, coking of coal) industry oil product storage tank, recycling and storage tank
In seal process, VOCs post-processes the technical problem that investment cost is high, process flow is complicated, sealing is big with nitrogen consumption.
To achieve the above objectives, the present invention adopts the following technical solutions: the utility model, which provides, reduces oil product storage tank
The system of VOCs discharge amount and sealing nitrogen consumption, including oil product storage tank, pressure calculator, blower, condenser, knockout drum
(i.e. VOCs pressure vessel) and height select pressure controller, are provided at the top of oil product storage tank and mend nitrogen entrance, the recycling gentle body of entrance
Outlet, gas vent are connect by pipeline with fans entrance, and fan outlet is connect by pipeline with condenser inlet, and condenser goes out
Condensed gas is sent into knockout drum by mouth by pipeline；
Knockout drum bottom is provided with heavy constituent outlet, is provided with light component escape orifice and emergency power at the top of knockout drum
Mouthful, light component escape orifice is connect by pipeline with the recycling entrance being arranged at the top of oil product storage tank；
Additional nitrogen is connect by pipeline with nitrogen entrance is mended.
Further, pressure-control valve is provided on the pipeline between gas vent and fans entrance.
Further, emergency power mouth is connect by pipeline with emergency processing equipment；Emergency processing equipment is to go to compress gas
Or VOVs processing equipment.
Further, it is provided on the pipeline between additional nitrogen and benefit nitrogen entrance and mends nitrogen valve；Gas vent and fans entrance
Between pipeline on be provided with isolating valve；Pipeline between light component escape orifice and the recycling entrance being arranged at the top of oil product storage tank
On be provided with isolating valve.
Further, pressure transmitter is provided on knockout drum and oil product storage tank.
Further, which further includes heat exchanger；Fan outlet is connected to by pipeline with heat exchanger entrance, heat exchanger exit
Gas after cooling is sent into condenser inlet by pipeline；It is provided on pipeline between heat exchanger exit and condenser inlet
Temperature-detecting device.
Further, blower is high-pressure frequency-conversion blower；Condenser uses recirculated water or air setting.
Further, oil product storage tank at least there are three；It is in parallel between oil product storage tank.
Further, heavy constituent is recycled in the form of lime set in VOCs.
The beneficial effects of the utility model are embodied in:
1, the system provided by the utility model for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption, using wind
Machine and knockout drum are equipped with reasonable control pressurer system, and the heavy constituent in VOCs can be collected in holding vessel in VOCs and be recycled,
Light component is then used as inert gas to replace conventional nitrogen-sealed gas.Process device is simple, and selection is easy, and is VOCs emission reduction drop
The new process of consumption.
2, the system provided by the utility model for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption, using height
Pressure fan pressurization, avoids the problem of conventional condensation recovery process needs cryogenic media.Knockout drum is set, both can be used for VOCs
Liquid separation also provides store buffer space with gas for oil product storage tank sealing.Reduce sealing to be consumed with nitrogen.Condensation process is adopted
With recirculated water or air-cooled, avoids cryogenic condensation cold source and carry out source problem, avoid process frosting problem.Reduce the VOCs of process
Discharge amount is recycled back to stocking system as storage tank ftercompction gas, after reducing VOCs for lightweight VOCs as sealing gas
Manage investment cost.
3, control pressurer system and parameter setting, storage tank ftercompction VOCs gas and nitrogen mixing proportion are through dynamic analog calcutation
Verifying guarantees safe operation of the system under various operating conditions.With the accumulation of light component in VOCs in the process, part light component
It is condensed, improves the rate of recovery of VOCs, reduce the investment of subsequent VOCs processing system, in the feelings for having low pressure gas system
Under condition, it can be not provided with VOCs absorption or incineration system, saved investment and material consumption and energy consumption, utilize the technique for having ready conditions
Place, have certain meaning and value.
Other features and advantages of the utility model will illustrate in the following description, and partly from specification
It becomes apparent, or is understood and implementing the utility model.The main purpose and further advantage of the utility model can lead to
Specifically noted scheme in specification, claims is crossed to be achieved and obtained.
Detailed description of the invention
The utility model is described in more detail with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram of the utility model embodiment one.
Fig. 2 is the structural schematic diagram of the utility model embodiment two.
Appended drawing reference: 1- oil product storage tank, 2- pressure-control valve, 3- blower, 4- condenser, 5- knockout drum, 6- height choosing pressure
It is standby that force controller, 7- mend nitrogen entrance, 8- recycling entrance, 9- gas vent, 10- heat exchanger, 11- light component escape orifice, 12- emergency
Nitrogen valve, 16- temperature-detecting device, 17- pressure transmitter are mended with mouth, 13- heavy constituent outlet, the additional nitrogen of 14-, 15-.
Specific embodiment
The technical solution of the utility model is described in detail by the following examples, embodiment below is only exemplary
, it is only capable of for explanation and illustration the technical solution of the utility model, and cannot be construed to technical solutions of the utility model
Limitation.
The light component or industrial chemicals that the VOCs of petrochemical system is dissolved in oil product more change in temperature, pressure
When the material composition that volatilizes, be utility originally, but be discharged into atmosphere and become exhaust gas.VOCs is compressed, one
Adiabatic condensation temperature can be improved in aspect, on the other hand the heavy constituent recycled in VOCs at normal temperature improves the light component in VOCs
Pressure, can be used as storage tank ftercompction gas after depressurizing, reduce the consumption of nitrogen.
Embodiment 1, the utility model provide the system for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption,
Pressure controller 6 is selected including oil product storage tank 1, pressure calculator, blower 3, condenser 4, knockout drum 5 and height, oil product storage tank 1 pushes up
Portion, which is provided with, mends nitrogen entrance 7, recycling entrance 8 and gas vent 9, and gas vent 9 is connect by pipeline with 3 entrance of blower, gas
Pressure-control valve 2 is provided on pipeline between outlet 9 and 3 entrance of blower.
The outlet of blower 3 is connect by pipeline with 4 entrance of condenser, and the outlet of condenser 4 passes through pipeline for condensed gas
It is sent into knockout drum 5；5 bottom of knockout drum is provided with heavy constituent outlet 13, and light component escape orifice 11 is provided at the top of knockout drum 5
With emergency power mouth 12, emergency power mouth 12 is connect by pipeline with emergency processing equipment；Emergency processing equipment is to go to compress watt
This or VOVs processing equipment.Light component escape orifice 11 is connected by pipeline with the recycling entrance 8 that 1 top of oil product storage tank is arranged in
It connects；Additional nitrogen 14 is connect by pipeline with nitrogen entrance 7 is mended.
It is provided on pipeline between additional nitrogen 14 and benefit nitrogen entrance 7 and mends nitrogen valve 15；Gas vent 9 and 3 entrance of blower
Between pipeline on be provided with isolating valve；Between light component escape orifice 11 and the recycling entrance 8 being arranged at the top of oil product storage tank 1
Isolating valve is provided on pipeline.Pressure transmitter 17 is provided on knockout drum 5 and oil product storage tank 1.
Wherein, blower 3 is high-pressure frequency-conversion blower 3；Condenser 4 uses recirculated water or air setting.
As shown in Figure 1, oil product storage tank 1 at least there are three；It is in parallel between oil product storage tank 1.The quantity of oil product storage tank 1 is according to reality
The setting of border demand, setting branch pipe and general pipeline when piping connection.The light component of volatilization can be used as pressurising medium, follow in systems
Ring, instead of part nitrogen.
The process of above-mentioned reduction oil product storage tank VOCs discharge amount and the system of sealing nitrogen consumption, including walk as follows
It is rapid:
Step 1 lays pipeline according to design drawing；Pressure-measuring-point, gas vent 9 and blower are set on oil product storage tank 1
Pressure-control valve 2 is set on the pipeline between 3 entrances；
Step 2 carries out simulation calculating, it is determined whether need to choose it according to storage medium and the VOCs being related to composition
Its gas determines gaseous mediums content as gaseous mediums, and it is cold to calculate room temperature according to selectable 3 outlet pressure of high pressure blower
The solidifying big VOCs amount of recycling, adjusts vector gas type and content when necessary.
Step 3 primarily determines that height selects according to 1 design pressure of oil product storage tank and system space size (containing pipe-line system)
The setting value of pressure controller 6, pressure reducing valve and voltage-controlled valve；
Step 4, by the reliability of dynamic analog calcutation verifying setting value.
Embodiment 2, the system for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption, with embodiment 1, difference
It is in further including heat exchanger 10；The outlet of blower 3 is connected to by pipeline with 10 entrance of heat exchanger, after the outlet of heat exchanger 10 will cool down
Gas pass through pipeline be sent into 4 entrance of condenser；Temperature is provided on pipeline between the outlet of heat exchanger 10 and 4 entrance of condenser
Detection device 16.It is shown in Figure 2.
Embodiment 3, there are three 3000 cubic metres of methanol tank (arch-roof tank, design pressure -500Pa- in certain chemical plant
It 2000Pa), is methanol steam and nitrogen envelope nitrogen in the VOCs component of discharge, it is 655Pa that breather valve, which breathes out pressure, and breather valve is inhaled
Entering pressure is 100Pa.
Big breathing maximum emission is 240m when feeding simultaneously3/ h, small breathing consider 10 degree of temperature difference, discharge amount 280
M3/h amounts to 520m3/h；The maximum Inhalation quantity that discharges simultaneously is 2070m3/h。
If not using internal floating roof tank, nitrogen consumption is 2072Nm3/h。
The system for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption is provided using the utility model, nitrogen disappears
Consumption is 24Nm3/ h(the nitrogen is the nitrogen amount that dissolution is pulled away in methyl alcohol).Circulating air gas flow is 2500m3/ h, wind
3 outlet pressure 200kPa of machine, 3 power 80kW of blower, circulation water consumption are 25m3/ h, 5 Liquid Phase Methanol of knockout drum is after condensation
580kg/h。
The methanol to volatilize in above-mentioned technique recycles in closed system, not because VOCs discharges bring loss of material, no
It needs to be arranged VOCs reprocessing facility, does not need setting internal floating roof tank, cost can be effectively reduced.
To sum up, the utility model provides the system for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption, will be oily
The VOCs that product storage tank 1 volatilizees is recycled after carrying out appropriate pressurization condensation, and unrecovered gas is circulated back to oil product storage tank 1, as ftercompction
Sealing gas uses.
By using blower 3 and knockout drum, it is equipped with reasonable control pressurer system, the heavy constituent in VOCs can be in knockout drum
It is recycled at the heavy constituent outlet 13 of 5 bottoms setting.Light component is then used as inert gas that conventional nitrogen-sealed is replaced to use
Gas.The problem of conventional condensation recovery process needs cryogenic media is avoided, (or cancellation) conventional nitrogen-sealed consumption nitrogen is reduced and asks
Topic, alleviates the load of subsequent VOCs treatment process (activated carbon adsorption or burning process).It can cancel in the case that condition is good
Subsequent VOCs treatment process.
It is to be noted that heavy constituent has difference according to the material difference of storage tank storage, it is in contrast.If it is
Methanol tank is protected with nitrogen, then methanol is exactly heavy constituent.Because it is different to separate pressure tank, coagulating the component got off also can be different.
The foregoing is merely the preferable specific embodiment of the utility model, but the protection scope of the utility model not office
Be limited to this, variation that anyone skilled in the art is expected within the technical scope disclosed by the utility model or
Replacement, should be covered within the scope of the utility model.
Claims (8)
1. the system for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption, it is characterised in that: including oil product storage tank
(1), blower (3), condenser (4), knockout drum (5) and height select pressure controller (6), are provided with benefit at the top of oil product storage tank (1)
Nitrogen entrance (7), recycling entrance (8) and gas vent (9), gas vent (9) are connect by pipeline with blower (3) entrance, blower
(3) outlet is connect by pipeline with condenser (4) entrance, and condenser (4) outlet passes through pipeline for condensed gas feeding point
From in tank (5)；
Knockout drum (5) bottom is provided with heavy constituent outlet (13), be provided at the top of knockout drum (5) light component escape orifice (11) and
Emergency power mouth (12), light component escape orifice (11) are connected by pipeline and the recycling entrance (8) being arranged at the top of oil product storage tank (1)
It connects；
Additional nitrogen (14) is connect by pipeline with nitrogen entrance (7) are mended.
2. the system for reducing oil product storage tank VOCs discharge amount as described in claim 1 and sealing nitrogen consumption, feature exist
In being provided with pressure-control valve (2) on the pipeline between gas vent (9) and blower (3) entrance.
3. the system for reducing oil product storage tank VOCs discharge amount as described in claim 1 and sealing nitrogen consumption, feature exist
In emergency power mouth (12) is connect by pipeline with emergency processing equipment；Emergency processing equipment is to go to compress gas or VOVs
Processing equipment.
4. the system for reducing oil product storage tank VOCs discharge amount as described in claim 1 and sealing nitrogen consumption, feature exist
In, additional nitrogen (14) and mends to be provided on pipeline between nitrogen entrance (7) and mend nitrogen valve (15)；Gas vent (9) and blower (3)
Isolating valve is provided on pipeline between entrance；Light component escape orifice (11) and setting being recovered at the top of oil product storage tank (1)
Isolating valve is provided on pipeline between mouth (8).
5. the system for reducing oil product storage tank VOCs discharge amount as described in claim 1 and sealing nitrogen consumption, feature exist
In being provided with pressure transmitter (17) on, knockout drum (5) and oil product storage tank (1).
6. the system for reducing oil product storage tank VOCs discharge amount as described in claim 1 and sealing nitrogen consumption, feature exist
In the system further includes heat exchanger (10)；Blower (3) outlet is connected to by pipeline with heat exchanger (10) entrance, heat exchanger (10)
Gas after cooling is sent into condenser (4) entrance by pipeline by outlet；Between heat exchanger (10) outlet and condenser (4) entrance
Pipeline on be provided with temperature-detecting device (16).
7. the system for reducing oil product storage tank VOCs discharge amount as described in claim 1 and sealing nitrogen consumption, feature exist
In blower (3) is high-pressure frequency-conversion blower (3)；Condenser (4) uses recirculated water or air setting.
8. the system for reducing oil product storage tank VOCs discharge amount as described in claim 1 and sealing nitrogen consumption, feature exist
In, oil product storage tank (1) at least there are three；It is in parallel between oil product storage tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822094609.6U CN209386009U (en) | 2018-12-13 | 2018-12-13 | The system for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822094609.6U CN209386009U (en) | 2018-12-13 | 2018-12-13 | The system for reducing oil product storage tank VOCs discharge amount and sealing nitrogen consumption |
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| CN209386009U true CN209386009U (en) | 2019-09-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404718A (en) * | 2018-12-13 | 2019-03-01 | 北京国电龙源环保工程有限公司 | It reduces oil product storage tank VOCs discharge amount and seals the system and method for nitrogen consumption |
-
2018
- 2018-12-13 CN CN201822094609.6U patent/CN209386009U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404718A (en) * | 2018-12-13 | 2019-03-01 | 北京国电龙源环保工程有限公司 | It reduces oil product storage tank VOCs discharge amount and seals the system and method for nitrogen consumption |
| CN109404718B (en) * | 2018-12-13 | 2023-12-19 | 国能龙源环保有限公司 | System and method for reducing VOCs emission and sealed nitrogen consumption of oil storage tank |
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Address after: 100039 room 901, 9 / F, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing Patentee after: Guoneng Longyuan environmental protection Co.,Ltd. Address before: 100039 room 911, 1 building, 16 West Fourth Ring Road, Haidian District, Beijing. Patentee before: BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENGINEERING Co.,Ltd. |