CN107489883A - Petroleum chemical enterprise VOCs collection and carrying method and centralized processing system - Google Patents
Petroleum chemical enterprise VOCs collection and carrying method and centralized processing system Download PDFInfo
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- CN107489883A CN107489883A CN201710960924.XA CN201710960924A CN107489883A CN 107489883 A CN107489883 A CN 107489883A CN 201710960924 A CN201710960924 A CN 201710960924A CN 107489883 A CN107489883 A CN 107489883A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/065—Arrangements for producing propulsion of gases or vapours
- F17D1/07—Arrangements for producing propulsion of gases or vapours by compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
Abstract
The invention belongs to industrial tail gas Treatment process field, it is related to a kind of petroleum chemical enterprise VOCs collection and carrying method and centralized processing system.Petroleum chemical enterprise VOCs provided by the invention collection and carrying method, by VOCs concentration≤25000mg/m3Gas be delivered to by gathering line in blender；By VOCs concentration ＞ 25000mg/m3, and VOCs concentration≤50000mg/m3Gas be delivered to after diluting line dilution in blender；By VOCs concentration ＞ 50000mg/m3Gas be delivered to after pretreatment unit is handled in blender；The output end of VOCs emission points is connected by the gathering line with the input of the blender, and VOCs concentration monitors and spark arrester are set on described gathering line.The present invention is able to ensure that security of the petroleum chemical enterprise during collecting, conveying and handle VOCs, is advantageous to uniformly focus on.
Description
Technical field
The invention belongs to industrial tail gas Treatment process field, it is related to collection and the carrying method of VOCs gases, and in particular to
The collection of petroleum chemical enterprise VOCs a kind of and carrying method and centralized processing system.
Background technology
VOCs (Volatile Organic Compounds) refers to volatile organic matter, mainly including hydro carbons, aromatic hydrocarbons
Class, alcohols, aldehydes, ketone, lipid, amine and organic acid etc., there is strong volatilization, special odor, excitant and toxicity,
Not only can baneful influence ecological environment, also health can be caused to seriously endanger.Industrial discharge is that main VOCs pollutions come
Source, such as the VOCs emission sources of typical petroleum chemical enterprise mainly have：1. crude oil, product oil loading place and tank field discharge gas；2. sewage
Treatment stations waste gas；3. liquid gas sweetening and coking plant tail gas；4. acid water process waste gas；5. chemical products benzene, toluene, two
The triphen such as toluene tank field；6. the alkene such as ethene, propylene, butylene, butadiene area；7. the basic chemical industries such as oxirane, expoxy propane
Raw material area etc..Each emission source VOCs concentration is different, and composition and property is different, unifies again at the VOCs of improvement according to Scatter Gather
Reason method, how by the VOCs safe collections of different emission points and to be delivered to device and be uniformly processed, it has also become petroleum chemical enterprise
One of key technology that VOCs is administered.
It is to defeat in detail that the VOCs of petroleum chemical enterprise, which is collected with the measure principle administered, at present, i.e., to different emission sources, root
The species discharged according to its VOCs is different from concentration and is collected and is handled using different methods, mainly scattered to administer and unite
One collects two classes of improvement.The former establishes treatment facility near VOCs emission points, is carried out in situ processing, general more using absorption
The technologies such as method, absorption method realize VOCs removing, can also be combined with other technologies, the H in removing discharge gas2S、RSH、CS2Deng
Sulphur-containing substance, such as washed using low temperature diesel oil+alkali lye desulfurization or low temperature diesel oil washes+membrane separation technique, so as to effectively removing discharge
Most of VOCs and sulfur-containing compound in gas.But scattered improvement has the following disadvantages：1) situation scattered more than the emission point
Under, the construction period length for the treatment of in situ facility, investment is big, the enterprise's VOCs processing costs added；2) some of petroleum chemical enterprise
VOCs emission points such as Oil Tank, acid water tank field and liquid gas sweetening unit etc., VOCs concentration of emission height, fluctuation of concentration
Scope is big, and existing treatment facility is often difficult to effectively remove VOCs in such cases, VOCs concentration in the tail gas after processing
It is still higher, it is unable to reach discharge standard.Unified administer is first to collect the VOCs of each primary discharge point by the way that pipeline is unified, so
Focus on again afterwards.It is general at present more using skills such as catalytic oxidation, regenerative oxidation method (RTO), flame combustion method and burning methods
Art, its biggest advantage are VOCs removal efficiencies height, can adapt to discharge the fluctuation of VOCs concentration in gas, realize qualified discharge,
If handling VOCs using the existing device of enterprise, can substantially reduce processing VOCs cost of investment and operation into
This, improves the economic benefit of enterprise.
By the VOCs that petroleum chemical enterprise is discharged is usually various hydrocarbon compounds, also contain on a small quantity in some discharge gas
Hydrogen, oxygen and sulfide etc., therefore during using unified Treatment process, it is unified collect, the safety in conveying and processing procedure
Property is an important factor for needing to consider first.So that a kind of safe collections of VOCs and carrying method are researched and developed, to ensuring
Securities of the VOCs of each emission point of enterprise in collection, conveying and processing procedure has great importance.
In consideration of it, special propose the present invention.
The content of the invention
The first object of the present invention is that the collection for providing a kind of petroleum chemical enterprise VOCs and carrying method, this method have safely
Effect, it can be ensured that security of the enterprise during collecting, conveying and handle VOCs, be advantageous to uniformly focus on.
The second object of the present invention is collection and the induction system for providing a kind of petroleum chemical enterprise VOCs, the security of system
Good, stable and reliable operation is simple in construction, and cost is low, practical.
The third object of the present invention is to provide a kind of petroleum chemical enterprise VOCs centralized processing systems, and the system can be protected fully
Demonstrate,prove security of the different VOCs emission points during collecting, conveying and handle VOCs, stable and reliable operation, structure letter
Single, cost is low, practical.
To achieve the above object, the technical solution adopted by the present invention is：
According to an aspect of the present invention, the present invention provides a kind of petroleum chemical enterprise VOCs collection and carrying method, the party
Method is by VOCs concentration≤25000mg/m3Gas be delivered to by gathering line in blender；
By VOCs concentration ＞ 25000mg/m3, and VOCs concentration≤50000mg/m3Gas after diluting line dilution
It is delivered in blender；
By VOCs concentration ＞ 50000mg/m3Gas be delivered to after pretreatment unit is handled in blender；
The output end of VOCs emission points is connected by the gathering line with the input of the blender, described collection
VOCs concentration monitors and spark arrester are set on pipeline.
As further preferred technical scheme, by VOCs concentration≤10000mg/m3Gas be delivered to by gathering line
In blender；Preferably by VOCs concentration≤8000mg/m3Gas be delivered to by gathering line in blender；
Preferably, the VOCs gases containing sulfide are handled to the content ＜ of sulfide through sulfide removal device
0.03v%, VOCs concentration≤25000mg/m3When, it is delivered to by gathering line in blender, preferably the content of sulfide
＜ 0.02v%, VOCs concentration≤10000mg/m3, more preferably content ＜ 0.01v%, the VOCs concentration of sulfide≤
8000mg/m3。
As further preferred technical scheme, two branch lines, respectively nitrogen sparge tube are set on described gathering line
Line and Dilution air pipeline；Or a Dilution air pipeline branch line is set on described gathering line, it is in parallel on this branch line
One looped pipeline line, valve is provided with described looped pipeline line and branch line；
Preferably, it is provided with flowmeter on described branch line or Dilution air pipeline；
Preferably, during using Dilution air line dilution VOCs, VOCs pressure higher than air pressure 2.0kPa with
On.
As further preferred technical scheme, VOCs collects content≤3% with oxygen in gas in course of conveying, preferably
For content≤0.5% of content≤1.5% of oxygen, more preferably oxygen.
Preferably, pressure is pressure-fired or tiny structure in VOCs gas collections and course of conveying；
It is highly preferred that pressure limit is -20kPa~-0.1kPa or 0.1kPa in VOCs gas collections and course of conveying
~20kPa, be preferably -10kPa~-0.5kPa or 0.5kPa~10kPa, more preferably -5kPa~-1kPa or
1kPa~5kPa.
As further preferred technical scheme, VOCs concentration≤25000mg/m of the output end output of the blender3,
Preferably≤10000mg/m3, more preferably≤8000mg/m3。
As further preferred technical scheme, the output end of the blender is connected by compressor and VOCs processing units
Connect, pressure of the VOCs after compressor compresses is 0.1MPa~0.6MPa, preferably 0.2MPa~0.5MPa, is more preferably
0.4MPa~0.5MPa；
Preferably, the front and rear of the compressor is respectively provided with spark arrester；
Preferably, surge tank is set between the blender and the compressor.
As further preferred technical scheme, into VOCs processing units before VOCs gas temperature≤200 DEG C, when
During 200 DEG C of VOCs gas temperatures ＞, VOCs gas temperature≤200 DEG C are cooled to using normal temperature air dilution.
According to another aspect of the present invention, the present invention also provides a kind of petroleum chemical enterprise VOCs collection and induction system,
Including at least one VOCs emission points and blender；
The output end of the VOCs emission points is connected by gathering line with the input of the blender, described collection
VOCs concentration monitors and spark arrester are set on pipeline；
Described gathering line is provided with least one branch line, and the branch line includes dilution pipeline；
Described gathering line is connected with pretreatment unit.
As further preferred technical scheme, described gathering line is also connected with sulfide removal device；
Preferably, two branch lines, respectively nitrogen purge line and Dilution air pipeline are set on described gathering line；
Or a Dilution air pipeline branch line is set on described gathering line, a looped pipeline line in parallel, described on this branch line
Valve is provided with looped pipeline line and branch line；
Preferably, it is provided with check valve between the spark arrester and the blender.
According to another aspect of the present invention, the present invention also provides a kind of petroleum chemical enterprise VOCs centralized processing systems, including
Above-mentioned petroleum chemical enterprise VOCs collection and induction system.
Compared with prior art, the beneficial effects of the present invention are：
1st, petroleum chemical enterprise VOCs provided by the invention collection and carrying method, suitable for there is unified collect and defeated to VOCs
Send the petroleum chemical enterprise of requirement or other similar industrial circles, this method are effective in VOCs gas collections and course of conveying therewith
Control VOCs concentration, and effectively control in course of conveying there is blast, the security risk such as burning, it is ensured that each VOCs
Securities of the VOCs of emission point in collection and course of conveying, is advantageous to uniformly administer, integration is strong, and cost is low, Neng Gouyou
Effect ground environmental protection.
2nd, petroleum chemical enterprise VOCs provided by the invention collection and induction system and centralized processing system, being will be each
The VOCs of VOCs emission points discharge, which is collected and is delivered in blender using pipe network, to be sufficiently mixed, and is re-fed into VOCs processing units
Handled, whole process ensures securities of the VOCs in collection, conveying and processing procedure, stable and reliable operation, structure
Simply, easily operated, convenient control, cost is low, practical, is advantageous to environmental protection.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skills, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is petroleum chemical enterprise VOCs centralized processing system structural representations provided by the invention.
Icon：1-VOCs emission points；2- blenders；3- compressors；4- catalytic cracking regenerators；5- surge tanks；
6- spark arresters；7- gathering lines；8- Dilution air pipeline branch lines；9- nitrogen purge line looped pipeline lines；10- valves；11-
Check valve；12- flowmeters.
Embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment and embodiment, but this area skill
Art personnel will be understood that following embodiments and embodiment are merely to illustrate the present invention, and be not construed as the model of the limitation present invention
Enclose.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
In a first aspect, present embodiment provides a kind of petroleum chemical enterprise VOCs collection and carrying method, this method be by
VOCs concentration≤25000mg/m3Gas be delivered to by gathering line in blender；
By VOCs concentration ＞ 25000mg/m3, and VOCs concentration≤50000mg/m3Gas after diluting line dilution
It is delivered in blender；
By VOCs concentration ＞ 50000mg/m3Gas be delivered to after pretreatment unit is handled in blender；
The output end of VOCs emission points is connected by the gathering line with the input of the blender, described collection
VOCs concentration monitors and spark arrester are set on pipeline.
At present, the unified collection administration way for petroleum chemical enterprise VOCs has a variety of, wherein, the VOCs that enterprise discharges is sent
It is a brand-new, efficient and economic VOCs treatment technology to enter direct burning processing in catalytic cracking regenerator, can either be fast
Speed effectively handles variety classes and the VOCs of concentration, meets emission request, can substantially reduce petroleum chemical enterprise VOCs processing again
Investment and operating cost, the environmental benefit and economic benefit for improving enterprise are significant.And the VOCs of discharge is sent into
Directly the burn premise of processing of catalytic cracking regenerator is that the collection and conveying of safety are carried out to the VOCs of emission point, in consideration of it,
The present invention is mainly according to petroleum chemical enterprise VOCs Drainage feature, processing VOCs technologies of directly being burnt for catalytic cracking regenerator,
And a kind of safe VOCs proposed collection and carrying method, the VOCs of each emission source is collected and defeated respectively using pipe network
Deliver to blender to be sufficiently mixed, be re-fed into catalytic cracking regenerator direct burning processing after compression, it is ensured that each row of enterprise
Put securities of the VOCs in collection, conveying and processing procedure a little.Enter in addition, the present invention is applicable not only to petroleum chemical enterprise VOCs
Enter in the direct burning treatment process of catalytic cracking regenerator, be also applied for there are unified other phases collected and conveyed and require to VOCs
Near field is closed and industrial circle.
By the VOCs that petroleum chemical enterprise is discharged is usually various hydrocarbon compounds, also contain on a small quantity in some discharge gas
Hydrogen, oxygen and sulfide etc.；And petroleum chemical enterprise's VOCs emission sources are more, the hydrocarbon compound nature difference in VOCs compositions
Larger, the VOCs in general enterprises is mostly C5And its following hydro carbons, triphen production and loading place have benzene,toluene,xylene
Deng, in course of conveying is collected there is blast, burning etc. security risk.Therefore collected, in conveying and processing procedure unified
Security be an important factor for needing to consider first.In the present invention, to VOCs collect and course of conveying security mainly from
Three aspects consider, 1. the burning-point and self-ignition point of the explosion limit of VOCs components/mixture, 2. VOCs components/mixture, 3.
The influence of temperature and pressure to explosion limit etc..
Therefore, the present invention to the factor such as the explosion limit of each component, burning-point and self-ignition point in VOCs by strictly being controlled
Make and reach safe collection and the purpose of conveying, using the concentration control far below explosion limit, less than the temperature control of self-ignition point
The methods of processed, ensures its security.That is, the concentration with effective control VOCs in course of conveying is collected in VOCs, various concentrations
VOCs is handled in different ways, after reaching satisfactory concentration, is re-fed into and is mixed in blender and follow-up
Processing, so as to fully ensure that VOCs is being collected and the security in course of conveying.
VOCs concentration in the present invention is with NMHC (NMHC, unit mg/m3) represent.
Further, by VOCs concentration≤10000mg/m3Gas be delivered to by gathering line in blender；It is preferred that
For by VOCs concentration≤8000mg/m3Gas be delivered to by gathering line in blender；
Preferably, the VOCs gases containing sulfide are handled to the content ＜ of sulfide through sulfide removal device
0.03v%, VOCs concentration≤25000mg/m3When, it is delivered to by gathering line in blender, preferably the content of sulfide
＜ 0.02v%, VOCs concentration≤10000mg/m3, more preferably content ＜ 0.01v%, the VOCs concentration of sulfide≤
8000mg/m3。
In the present invention, the VOCs concentration before entering to blender can be≤25000mg/m3, be preferably≤
10000mg/m3, more preferably≤8000mg/m3, in this concentration range, the security collected and conveyed can be ensured,
It can be fed directly in blender by gathering line.If VOCs concentration ＞ 25000mg/m3, and≤50000mg/m3, then
It is chain to open dilution pipeline, by VOCs concentration dilutions to≤25000mg/m3Or 8000mg/m3Afterwards, then by gathering line convey
Into blender, extension rate is depending on the VOCs concentration monitored；If VOCs concentration ＞ 50000mg/m3, then need to carry out in advance
Processing is to reclaim most of oil gas, and preprocess method can select low temperature diesel absorption process, absorption method and membrane separation process etc., through pre-
Gas VOCs concentration≤25000mg/m after processing3Afterwards, then by gathering line it is delivered in blender.
In addition, some can also contain H in the gas of each VOCs emission points discharge2S、RSH、CS2Deng sulphur-containing substance, it is necessary to
VOCs gases containing sulfide are pre-processed by alkali cleaning or other method, so that the content ＜ of its sulfide
0.03v%, preferably ＜ 0.02v%, more preferably ＜ 0.01v%, are then delivered in blender again.
Further, two branch lines, respectively nitrogen purge line and Dilution air pipe are set on described gathering line
Line；Or a Dilution air pipeline branch line is set on described gathering line, a looped pipeline line in parallel, described on this branch line
Looped pipeline line and branch line on be provided with valve；
Preferably, it is provided with flowmeter on described branch line or Dilution air pipeline；
Preferably, during using Dilution air line dilution VOCs, VOCs pressure higher than air pressure 2.0kPa with
On.
Described looped pipeline line is nitrogen purge line, and the effect for setting nitrogen purge line is to be used to clean pipe network, will be managed
The impurity such as the residue in net are purged, and prevent inflammable and explosive material from being remained in pipe.The work of Dilution air pipeline is set
With being dilution VOCs concentration, as VOCs concentration ＞ 25000mg/m3, and≤50000mg/m3When, then it is chain to open Dilution air pipe
Line, VOCs is passed through in Dilution air pipeline, and ensured in dilution, VOCs pressure higher than air pressure 2.0kPa with
On.
Further, in VOCs gas collections and course of conveying in gas oxygen content≤3%, preferably oxygen contains
Amount≤1.5%, more preferably content≤0.5% of oxygen.
Preferably, pressure is pressure-fired or tiny structure in VOCs gas collections and course of conveying；
It is highly preferred that pressure limit is -20kPa~-0.1kPa or 0.1kPa in VOCs gas collections and course of conveying
~20kPa, be preferably -10kPa~-0.5kPa or 0.5kPa~10kPa, more preferably -5kPa~-1kPa or
1kPa~5kPa.
VOCs emission sources are divided into two classes：One kind is low oxygen discharge source, usually have nitrogen seal storage tank, as sour water tank,
Sump oil Water Tank, head tank and products pot etc., the VOCs discharged is not oxygenous or oxygen content is very low；Another kind of is hyperoxia discharge
Source, oxygen content is higher in the gas discharged, and generally higher than 3%, such as liquid gas sweetening tail gas, foul gas administers tail gas,
Oxygen content is higher in the VOCs gases of sewage farm tail gas etc., oil loading area and sewage farm discharge, is almost empty entirely
Gas.In the present invention, according to the difference of emission source, collected in VOCs and use different control measure in course of conveying, it is ensured that peace
Quan Xing.If oxygen content is more than 3% in gas, content≤3% with oxygen in control gas in course of conveying is being collected, preferably
For≤1.5%, more preferably≤0.5%.If oxygen content ＞ 3% in gas, control VOCs concentration≤8000mg/m3。
Also, it is pressure-fired or micro- negative collecting with the pressure of the pipe network before in course of conveying, also needing to control gas to enter blender
Pressure.
Further, VOCs concentration≤25000mg/m of the output end output of the blender3, be preferably≤
10000mg/m3, more preferably≤8000mg/m3。
Further, the output end of the blender is connected by compressor with VOCs processing units, and VOCs is through compressor
Pressure after compression is 0.1MPa~0.6MPa, preferably 0.2MPa~0.5MPa, more preferably 0.4MPa~0.5MPa；
Preferably, the front and rear of the compressor is respectively provided with spark arrester；
Preferably, surge tank is set between the blender and the compressor.
Further, into VOCs gas temperature≤200 DEG C before VOCs processing units, as VOCs gas temperatures ＞
At 200 DEG C, VOCs gas temperature≤200 DEG C are cooled to using normal temperature air dilution.
Further, N is set between compressor and VOCs processing units2Bypass.
The VOCs of each VOCs emission points discharge reaches after predetermined concentration is sufficiently mixed into blender, then through compressor
Into in VOCs processing units (can be catalytic cracking unit), spark arrester is respectively mounted before and after compressor；If VOCs is directly entered
Catalytic cracking unit, then as 200 DEG C of VOCs mixture temperatures ＞, diluted at once with nitrogen at room, spark arrester enables, and prevents heat
Amount passback, when VOCs mixture pressures are less than setting value, open N2Bypass, supplement N2, maintain certain pressure to prevent material from returning
Pass；When VOCs concentration is more than controlling value, N is opened2Bypass, supplement N2, that is, ensure under any fortuitous event, do not influence to be catalyzed
The normal operation of cracking unit.
Second aspect, present embodiment provide a kind of petroleum chemical enterprise VOCs collection and induction system, including at least one
VOCs emission points and blender；
The output end of the VOCs emission points is connected by gathering line with the input of the blender, described collection
VOCs concentration monitors and spark arrester are set on pipeline；
Described gathering line is provided with least one branch line, and the branch line includes dilution pipeline；
Described gathering line is connected with pretreatment unit.
Further, described gathering line is also connected with sulfide removal device；
Preferably, two branch lines, respectively nitrogen purge line and Dilution air pipeline are set on described gathering line；
Or a Dilution air pipeline branch line is set on described gathering line, a looped pipeline line in parallel, described on this branch line
Valve is provided with looped pipeline line and branch line；
Preferably, it is provided with check valve between the spark arrester and the blender.
Further, flowmeter is set on gathering line, flowmeter is set on Dilution air pipeline.
Described VOCs concentration monitors are preferably VOCs in-line analyzers, and automaticity is high, facilitates operational control.Together
When, by the setting of spark arrester, it can further ensure that the security collected and conveyed, safe coefficient height.
The third aspect, present embodiment provide a kind of petroleum chemical enterprise VOCs centralized processing systems, including above-mentioned petrochemical industry enterprise
Industry VOCs collection and induction system.
Petroleum chemical enterprise's VOCs centralized processing systems in present embodiment, include petroleum chemical enterprise VOCs collection and delivery system
System, in addition to compressor and VOCs processing units etc., wherein VOCs processing units are preferably catalytic cracking unit.Need what is illustrated
Be petroleum chemical enterprise VOCs centralized processing systems, can also include other equipment and pipeline, and the system be related to other
Equipment is existing equipment.Key in present embodiment is including the petroleum chemical enterprise of the present invention in the processing system
VOCs collection and induction system.
With reference to specific embodiments and the drawings, the invention will be further described.
Embodiment 1
The collection of petroleum chemical enterprise VOCs a kind of and carrying method, comprise the following steps：
(a) VOCs that the Transform of Lpg Sweetening Unit of refinery one is discharged is collected, its VOCs concentration is 89500mg/
m3, flow 150m3/ h, after low temperature diesel oil absorbs and alkali cleaning pre-processes, VOCs concentration is 12400mg/m3, tail gas, which enters, to be received
Manifold line；
(b) Dilution air pipeline is opened, is diluted with the air of 2 times of VOCs flows, i.e., air mass flow is 300m3/ h,
VOCs concentration after dilution is 4133mg/m3；
(c) the VOCs gases after step (b) dilution enter blender, and the VOCs collected from each emission point is in blender
In it is full and uniform, it is -1.0kPa that vacuum is kept in blender and pipeline before；
(d) after the VOCs after blended device is well mixed is forced into 0.4~0.6MPa, air main line is mixed into, then
Enter burning processing in catalytic cracking regenerator in the lump；
(e) VOCs concentration is 15mg/m in the regenerated flue gas after burning3, can directly discharge.
Embodiment 2
The collection of petroleum chemical enterprise VOCs a kind of and carrying method, as different from Example 1, step (b), in the present embodiment
Omit step (b).That is, it is 12400mg/m by pretreated concentration in step (a) in the present embodiment3VOCs gases are delivered to
Enter full and uniform in blender, it is -3.0kPa that vacuum is kept in blender and pipeline before.
Embodiment 3
The collection of petroleum chemical enterprise VOCs a kind of and carrying method, comprise the following steps：
(a) VOCs that the Oil Tank of refinery one is discharged is collected, its VOCs concentration is 67000mg/m3, flow is
500m3/h；The wherein SO containing 850ppm2With 210ppm NOX；After pretreatment, VOCs concentration is 4300mg/ in tail gas
m3, into gathering line；
(b) VOCs gases after pretreatment enter blender in step (a), and the VOCs collected from each emission point exists
Full and uniform in blender, it is -1.5kPa that vacuum is kept in blender and pipeline before；
(c) after the VOCs after blended device is well mixed is forced into 0.4~0.5MPa, air main line is mixed into, then
Handled into the burning of catalytic cracking regenerator incipient scorch tank；
(d) VOCs concentration is 20mg/m in the regenerated flue gas after burning3, but because wherein containing SO2And NOXDeng, need through
Regenerated flue gas processing system carries out desulfurization and denitration, in the flue gas discharged after final purification, its NMHC, SOXAnd NOXDeng reaching completely
Mark discharge.
Embodiment 4
The collection of petroleum chemical enterprise VOCs a kind of and carrying method, comprise the following steps：
(a) VOCs of the tank field foul gas treatment facility outlet drain of refinery one is collected, its VOCs concentration is
1030mg/m3, flow 200m3/ h, oxygen content is 3.3v% in gas；
(b) the VOCs gases in step (a) enter blender, and the VOCs collected from each emission point fills in a mixer
Divide uniformly, VOCs concentration is 7300mg/m in blender3, keep in blender and pipeline before vacuum for-
1.0kPa；
(c) after the VOCs after blended device is well mixed is forced into 0.6MPa, it is directly entered catalytic cracking regenerator internal combustion
Burning processing；
(d) VOCs concentration is 10mg/m in the regenerated flue gas after burning3, can directly discharge.
Embodiment 5
As shown in figure 1, the present embodiment provides a kind of petroleum chemical enterprise VOCs centralized processing systems, including at least one VOCs rows
A little 1 and blender 2 is put, in addition to compressor 3 and catalytic cracking regenerator 4, the present embodiment enter by taking three VOCs emission points 1 as an example
Row is further to be illustrated.
The output end of VOCs emission points 1 is connected by gathering line 7 with the input of blender 2, the output end of blender 2
It is connected by compressor 3 with catalytic cracking regenerator 4；VOCs concentration monitors and spark arrester 6 are set on gathering line 7；Collect
Pipeline 7 is provided with least one branch line, and branch line includes dilution pipeline；Gathering line 7 connects with pretreatment unit (not shown)
Connect.
Further, gathering line 7 is also connected with sulfide removal device (not shown).
Further, two branch lines, respectively nitrogen purge line and Dilution air pipeline are set on gathering line 7；Or
One Dilution air pipeline branch line 8 is set on the gathering line 7 of person, a nitrogen purge line looped pipeline line in parallel on this branch line
9, valve 10 is provided with nitrogen purge line looped pipeline line 9 and Dilution air pipeline branch line 8.
Further, check valve 11 is provided between spark arrester 6 and blender 2.
Further, flowmeter 12 is set on Dilution air pipeline branch line 8.
Further, the front and rear of compressor 3 is respectively provided with spark arrester 6.
Further, surge tank 5 is set between blender 2 and compressor 3.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of petroleum chemical enterprise VOCs collection and carrying method, it is characterised in that this method be by VOCs concentration≤
25000mg/m3Gas be delivered to by gathering line in blender；
By VOCs concentration ＞ 25000mg/m3, and VOCs concentration≤50000mg/m3Gas conveyed after diluting line dilution
Into blender；
By VOCs concentration ＞ 50000mg/m3Gas be delivered to after pretreatment unit is handled in blender；
The output end of VOCs emission points is connected by the gathering line with the input of the blender, described gathering line
Upper setting VOCs concentration monitors and spark arrester.
2. petroleum chemical enterprise VOCs according to claim 1 collection and carrying method, it is characterised in that by VOCs concentration≤
10000mg/m3Gas be delivered to by gathering line in blender；Preferably by VOCs concentration≤8000mg/m3Gas lead to
Gathering line is crossed to be delivered in blender；
Preferably, the VOCs gases containing sulfide are handled to the content ＜ 0.03v% of sulfide through sulfide removal device,
VOCs concentration≤25000mg/m3When, it is delivered to by gathering line in blender, preferably the content ＜ of sulfide
0.02v%, VOCs concentration≤10000mg/m3, more preferably content ＜ 0.01v%, the VOCs concentration of sulfide≤
8000mg/m3。
3. petroleum chemical enterprise VOCs according to claim 1 collection and carrying method, it is characterised in that described collecting pipe
Two branch lines, respectively nitrogen purge line and Dilution air pipeline are set on line；Or set one on described gathering line
Bar Dilution air pipeline branch line, a looped pipeline line in parallel on this branch line, valve is provided with described looped pipeline line and branch line；
Preferably, it is provided with flowmeter on described branch line or Dilution air pipeline；
Preferably, during using Dilution air line dilution VOCs, VOCs pressure is higher than more than air pressure 2.0kPa.
4. petroleum chemical enterprise VOCs according to claim 1 collection and carrying method, it is characterised in that VOCs collect and it is defeated
During sending in gas content≤1.5%, more preferably oxygen of content≤3%, preferably oxygen of oxygen content
≤ 0.5%；
Preferably, pressure is pressure-fired or tiny structure in VOCs gas collections and course of conveying；
It is highly preferred that in VOCs gas collections and course of conveying pressure limit be -20kPa~-0.1kPa or 0.1kPa~
20kPa, it is preferably -10kPa~-0.5kPa or 0.5kPa~10kPa, more preferably -5kPa~-1kPa or 1kPa
~5kPa.
5. petroleum chemical enterprise VOCs according to claim 1 collection and carrying method, it is characterised in that the blender
VOCs concentration≤25000mg/m of output end output3, it is preferably≤10000mg/m3, more preferably≤8000mg/m3。
6. collection and the carrying method of the petroleum chemical enterprise VOCs according to any one of Claims 1 to 5, it is characterised in that institute
The output end for stating blender is connected by compressor with VOCs processing units, and pressure of the VOCs after compressor compresses is 0.1MPa
~0.6MPa, preferably 0.2MPa~0.5MPa, more preferably 0.4MPa~0.5MPa；
Preferably, the front and rear of the compressor is respectively provided with spark arrester；
Preferably, surge tank is set between the blender and the compressor.
7. petroleum chemical enterprise VOCs according to claim 6 collection and carrying method, it is characterised in that into VOCs processing
VOCs gas temperature≤200 DEG C before device, as 200 DEG C of VOCs gas temperatures ＞, it is cooled to using normal temperature air dilution
VOCs gas temperature≤200 DEG C.
8. a kind of petroleum chemical enterprise VOCs collection and induction system, it is characterised in that including at least one VOCs emission points and mix
Clutch；
The output end of the VOCs emission points is connected by gathering line with the input of the blender, described gathering line
Upper setting VOCs concentration monitors and spark arrester；
Described gathering line is provided with least one branch line, and the branch line includes dilution pipeline；
Described gathering line is connected with pretreatment unit.
9. petroleum chemical enterprise VOCs according to claim 8 collection and induction system, it is characterised in that described collecting pipe
Line is also connected with sulfide removal device；
Preferably, two branch lines, respectively nitrogen purge line and Dilution air pipeline are set on described gathering line；Or
One Dilution air pipeline branch line is set on described gathering line, a looped pipeline line in parallel, described looped pipeline on this branch line
Valve is provided with line and branch line；
Preferably, it is provided with check valve between the spark arrester and the blender.
10. a kind of petroleum chemical enterprise VOCs centralized processing systems, it is characterised in that including the petroleum chemical enterprise described in claim 8 or 9
VOCs collection and induction system.
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|---|---|---|---|
| CN201710960924.XA CN107489883B (en) | 2017-10-13 | 2017-10-13 | Method for collecting and conveying VOCs (volatile organic chemicals) of petrochemical enterprises |
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| CN113446611A (en) * | 2021-06-24 | 2021-09-28 | 中海石油中捷石化有限公司 | VOCs (volatile organic compounds) emission treatment method for chemical and industrial laboratory analysis room |
| CN114939337A (en) * | 2022-04-11 | 2022-08-26 | 北京安星达环保技术发展有限公司 | Comprehensive treatment method for organic volatile matters of refining enterprises |
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