CN106765210A - A kind of incineration treatment method and device of refinery's organic exhaust gas - Google Patents
A kind of incineration treatment method and device of refinery's organic exhaust gas Download PDFInfo
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Abstract
The present invention relates to a kind of incineration treatment method of refinery's organic exhaust gas, the organic concentration in waste gas is detected first, when organic concentration is more than UEL, waste gas is directly entered heating furnace burning disposal；When organic concentration is less than UEL, the organic concentration that waste gas enters in diesel oil absorption equipment stabilization waste gas is 5000-35000mg/m3, and burning disposal is carried out with the suitable existing heating furnace of air quantity with this concentration and exhausted air quantity selection；When without discharge gas, introduce a certain amount of air and enter diesel oil absorption equipment, make organic concentration stabilization 5000-35000mg/m after treatment in waste gas3, subsequently into heating furnace burning disposal.Organic concentration in present invention detection waste gas first, and shunting treatment is carried out according to organic concentration difference, under waste gas discharge time and organic concentration uncertain condition, without interference with the normal operation of heating furnace and its air distribution blower fan, without risk of explosion and hidden danger, by after burning disposal, purified gas can qualified discharge.
Description
Technical field
The present invention relates to environmentally friendly technical field of waste gas treatment, and in particular to a kind of incineration treatment method and device of refinery's organic exhaust gas.
Background technology
The complicated component of organic exhaust gas, serious harm is produced to environment and the mankind, it has also become one of emphasis of China environmental protection work.Oil plant is during crude oil is processed, some facilities inevitably give off substantial amounts of odor pollution waste gas, such as sour water storage tank, semi-finished product oil product storage tank, sump oil storage tank, particularly sour water storage tank etc., the waste gas component of loss is complicated, and odorant pollutant includes hydrogen sulfide, organic sulfur compound, benzene homologues and other VOCs in waste gas（Volatile organic matter）Etc. component.The waste gas not only causes the odor pollution of surrounding enviroment, and health is threatened, and causes a large amount of hydrocarbon resources to waste.Particularly this kind of waste gas belongs to uncontrollable discharge pollution sources, and drain time, discharge capacity and pollutant concentration do not know, and purification difficulty is larger.
At present, the commonplace method of organic exhaust gas is administered both at home and abroad has absorption method, absorption process, condensation method, oxidizing process, biological treatment etc., occurs in that some new technologies, such as membrane separation process, light decomposition method and adsoption catalysis oxidation comprehensive treatment technique again in recent years.Combustion method is higher than totally absorption process and absorption method to the removal efficiency of organic exhaust gas, it has also become the important means of VOCs treatment.Combustion method is to compare organic waste-gas purification method thoroughly, in oil plant, using the treatment organic exhaust gas such as existing heating furnace, incinerator, catalytic cracking regenerator and CO boilers, torch, invests small, and purification efficiency is high.Current combustion method mainly has common flame combustion, catalysis burning, heat-accumulation combustion, heat-storage catalytic burning, boiler heating power burning etc..Common flame combustion is during organic exhaust gas feeding had into the combustion furnace of flame, combustible component is burnt, and changes into carbon dioxide and water, and the method treatment effeciency is high, but high energy consumption, and operating cost is too high, and a large amount of hydrocarbon resources are wasted in waste gas.Boiler heating power combustion technology refers to the existing power supply boiler of utilization, heating boiler or other non-exhaust-gas treatments special heating furnace or incinerator, and the waste gas of generation is introduced directly into combustion chamber, and the purpose of removal pollutant is reached in the case of the oil (gas) filling device that reduces as far as possible.The method has simple and practical, and reduced investment, operating cost is low, and removal efficiency is high, moreover it is possible to bring certain economic benefit, it is adaptable to VOCs treatment, at present using more universal.But the normal operation of heating furnace and its air distribution blower fan can be disturbed, and there is risk of explosion and hidden danger.
CN103697482A discloses a kind of organic exhaust gas boiler heating power burning processing system and handling process, processing unit includes the absorption plant, boiler fan, boiler, desulphurization denitration dust arrester and the chimney that are sequentially connected with, on the premise of clean-up effect is ensured, processed by setting demisting, emergent emission treatment and air balance are processed, and enhance the stability and security of whole technique.But, the method only at exhaust gas concentration less than explosion limit 1/4, can just be continued with into follow-up CIU, be only applicable to the treatment of low concentration organic exhaust gas.For high-concentration organic waste gas, because the LEL of most of organic matters is in 20000~50000mg/m3, being prescribed a time limit less than 1/4 explosion limit due to exhaust gas concentration to be controlled can just enter follow-up burning disposal, namely waste gas total hydrocarbon concentration is higher than 12500mg/m3Waste gas all will directly from emergent floss hole discharge, not reach processing intent.In addition, the device also needs to set special air balance treatment, and absorption plant in the technique is that the impurity in waste gas, particle and acidic materials are pre-processed, it is impossible to reclaim the hydrocarbons in waste gas, a large amount of hydrocarbon resources are caused to waste, it is less economical.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of incineration treatment method and device of refinery's organic exhaust gas.Organic concentration in present invention detection waste gas first, and shunting treatment is carried out according to organic concentration difference, under waste gas discharge time and organic concentration uncertain condition, without interference with the normal operation of heating furnace and its air distribution blower fan, without risk of explosion and hidden danger, by after burning disposal, purified gas can qualified discharge.
The incineration treatment method of refinery's organic exhaust gas of the present invention, including following content：Organic concentration first in detection waste gas, when organic concentration is more than UEL, waste gas is directly entered heating furnace burning disposal；When organic concentration is less than UEL, the organic concentration that waste gas enters in diesel oil absorption equipment stabilization waste gas is 5000-35000mg/m3, and burning disposal is carried out with the suitable existing heating furnace of air quantity with this concentration and exhausted air quantity selection；When without discharge gas, introduce a certain amount of air and enter diesel oil absorption equipment, make organic concentration stabilization 5000-35000mg/m after treatment in waste gas3, subsequently into heating furnace burning disposal.
In the present invention, organic exhaust gas discharge waste gas essentially from petroleum chemical enterprise's raw material storage tank, acid water tank field, alkaline residue acidification treater etc., and the drain time and organic concentration of this kind of waste gas are in dynamic change, and its concentration typically may be up to hundreds of thousands even mg/m up to a million3.When the sulfide containing high concentration in waste gas（H2S and organic sulfur compound）When, concentration is thousands of to hundreds of thousands mg/m3, diesel oil absorption equipment can remove organic sulfur compound and partial vulcanization hydrogen in waste gas.When concentration of hydrogen sulfide is too high, can further supporting corresponding desulfurization equipment, alkali liquor absorption equipment can be such as set, by the hydrogen sulfide stripping in waste gas.
In the present invention, when organic concentration is more than UEL in waste gas, waste gas does not exist risk of explosion, can be directly entered heating furnace and burn or burned after mixing with fuel gas.
In the present invention, when THC concentration is less than UEL in waste gas, the organic concentration that waste gas enters in diesel oil absorption equipment stabilization waste gas is 5000-35000mg/m3, and burning disposal is carried out with the suitable existing heating furnace of air quantity with this concentration and exhausted air quantity selection.The suitable heating furnace of air quantity is matched somebody with somebody in selection, and maximum organic concentration is adjusted in waste gas after generally being absorbed with diesel oil.The operation operating mode of the heating furnace of selection is good, and fully, the NMHC in flue gas is less than 20mg/m for fuel combustion3, NOXLess than 100mg/m3, can be oil refining process heating furnace, FCC waste heat boilers, burn stove, tail gas of sulphur incinerator, burn ammonia stove etc..Organic concentration is relatively stable in waste gas after being absorbed due to diesel oil, therefore selects existing suitable heating furnace with this concentration, it is not necessary to newly added equipment, also without interference with the normal operation of existing heating furnace or incinerator.
In the present invention, diesel oil absorbent can select gas-oil, including normal two wires gas-oil, atmosphere 3rd side cut gas-oil, catalytic cracking gas-oil, preferably normal two, three line gas-oil, the rich diesel oil absorbent after absorption to go hydrotreating after mixing with hydrogenating materials.It is adjusted by diesel oil absorption equipment operating parameter, organic concentration in waste gas after control absorption, main control parameters have：Liquid-gas ratio is 60-150L/m3, preferably 80-100L/m3；It is 5-40 DEG C, preferably 10-35 DEG C to absorb temperature；Absorption pressure is 20-200kPaG, preferably 50-150kPaG.
In the present invention, waste gas is needed to be introduced into gas mixer after diesel oil absorbs, and burning disposal is carried out again after being sufficiently mixed with the air distribution air of selected heating furnace；Waste gas distributor is set more preferably in gas mixer, in case local concentration is too high to form explosive air mass.
Usual organic exhaust gas have 3 kinds of modes into heating furnace or incinerator treatment, and one is to be directly entered combustion chamber, and two are entered with air, and three are entered with fuel gas（Coal-fired, oil burning boiler can not be input into fuel）.First way will ensure that the organic concentration in waste gas is less than the 25% of LEL or much larger than UEL；The second way will ensure the organic concentration in gaseous mixture less than the 25% of LEL；The third mode will ensure that the organic concentration in mixed gas is much larger than UEL.Therefore, the relatively low waste gas of organic concentration preferably enters with air, and dense waste gas preferably enters with fuel gas.The suitable heating furnace of air quantity is matched somebody with somebody in the concentration that the present invention passes through organic matter in diesel oil Vapor recovery unit waste gas, selection, and controls waste gas to be less than 200mg/m with the organic concentration of heating furnace air distribution air gas mixture3, preferably smaller than 100mg/m3Oxidation stain material consumption oxygen amount is less than 0.05%, preferably smaller than 0.03%, 25% of the organic concentration far smaller than LEL in mixed gas can be ensured, high-concentration organic waste gas can enter heating furnace with air, in the absence of risk of explosion and hidden danger, also without interference with the normal operation of existing heating furnace or incinerator.
In the present invention, when discharge region non-exhaust emission, a certain amount of air is introduced in diesel oil absorption equipment, maintain the stabilization of diesel oil absorption equipment pressure, diesel oil is contacted with air inversion simultaneously, and diesel oil volatilizees on a small quantity, the organic concentration of waste gas is basically stable at 5000-20000mg/m3Between.
Device of the present invention for above-mentioned organic exhaust gas incineration treatment method, including waste gas stream gauge, air door, Waste gas inducing equipment, hydrocarbon concentration in-line analyzer, exhaust gas switching valve group, diesel oil absorption equipment, gas mixer, heating furnace gas-distributing fan and heating furnace etc., wherein waste gas stream gauge is used to monitor whether that discharge gas is produced, when there is discharge gas, waste gas stream gauge conveys shutdown signal to air door, when without discharge gas, flowmeter sends signal and opens air door, introduces a certain amount of air and enters diesel oil absorption equipment；Waste gas inducing equipment is used to introduce exhaust gas into diesel oil absorption equipment or heating furnace；Hydrocarbon concentration in-line analyzer with total hydrocarbon concentration in on-line monitoring waste gas, while give exhaust gas switching valve group corresponding signal, when total hydrocarbon concentration is more than UEL, open the valve that waste gas is directly discharged into heating furnace, close the valve for entering diesel oil absorption equipment；When total hydrocarbon concentration is less than UEL, unlatching enters the valve of diesel oil absorption equipment, and closing is discharged into the valve of heating furnace；Diesel oil absorption equipment is used to reclaim organic matter in waste gas, removes organic sulfur compound and partial vulcanization hydrogen, and after ensureing to absorb in waste gas organic concentration stabilization in 5000-35000mg/m3；Waste gas mixes with heating furnace air distribution air proportion after gas mixer is used to absorb, and organic concentration is less than 200mg/m after making mixing3, oxidation stain material consumption oxygen amount is less than 0.05%；Gas sends into heating furnace burning disposal, purified gas qualified discharge by heating furnace gas-distributing fan after mixing.
In the present invention, when there is waste gas to discharge, in respect of flow indication, conveying shutdown signal is to air door for exhaust gas flow；When non-exhaust emission, waste gas stream gauge sends signal, opens air door, introduces a certain amount of air and enters diesel oil absorption equipment, maintain the stabilization of diesel oil absorption equipment pressure, and ensure diesel oil absorb after organic concentration in waste gas be basically stable at 5000-35000mg/m3。
In the present invention, diesel oil absorption equipment can be using the conventional structurally and operationally condition in this area, such as using material filling type absorption tower, and inner-tower filling material is conventional structured packing, preferably metal structured packing, more preferably metal step ring.
In the present invention, when sulfide containing high concentration in waste gas, can further supporting corresponding desulfurization equipment, can such as set alkali liquor absorption equipment, realize the thorough removing of hydrogen sulfide.
In the present invention, emergent interlocking cut-out valve group and aiutage are installed on the pipeline before gas mixer and on the outer comb line of diesel oil absorption equipment, when heating furnace air distribution blower fan stops, emergency switching-off valve group carries out interlocking switching, cut-out enters the valve group of gas mixer, waste gas is opened to aiutage valve group, waste gas is directly discharged by aiutage.Spark arrester is set on pipeline before diesel oil absorption equipment discharge waste gas mixes with air distribution air and on discharge waste gas to the pipeline of aiutage, strengthens stability and security.
Compared with prior art, the inventive method has the advantages that：
（1）Organic concentration in present invention detection waste gas first, shunting treatment is carried out based on this concentration difference, by the organic concentration in diesel oil Vapor recovery unit waste gas, and existing suitable heating furnace is selected with this concentration, control waste gas enters organic concentration during heating furnace with air distribution air, in the case of waste gas discharge time and organic concentration are uncertain, without interference with the normal operation of heating furnace and its air distribution blower fan, without risk of explosion and hidden danger, by after burning disposal, purified gas can qualified discharge.
（2）Present invention can ensure that in diesel oil absorption equipment pressure and subsequent processes organic concentration stabilization, it is not necessary to concentration and air balance equipment are set, without interference with the normal operation of existing heating furnace；And a large amount of wastes of hydrocarbons can be avoided, it is particularly well-suited to the exhaust-gas treatment in evacuation time and the uncertain uncontrollable discharge source of organic concentration.
（3）The drain time and organic concentration of high-concentration organic waste gas are unstable, such as with fuel gas or are directly entered heating furnace, there is risk, and security is poor.Therefore, high-concentration organic waste gas are entered heating furnace by the present invention with air, regulate and control while by organic concentration in mixed gas and oxidation stain material consumption oxygen amount, it is not necessary to set flammable gas alarm, it is ensured that safe combustion.
Brief description of the drawings
Fig. 1 is a kind of concrete technology flow process figure of the invention；
Wherein, 1- high-concentration organic waste gas, 2- waste gas stream gauge, 3- Waste gas inducing equipment, 4- air, 5- air doors, 6- hydrocarbon concentration in-line analyzers, 7-8- exhaust gas switching valve groups, 9- diesel oil absorption equipments, 10- alkali liquor absorption equipment, 11- spark arresters, 12- heating furnace air distribution air, 13- gas mixers, 14- heating furnace gas-distributing fans, 15- heating furnaces, 16- furnace fuels, the emergent interlocking cut-out valve groups of 17-18-, 19- spark arresters, 20- meets an urgent need aiutage.
Specific embodiment
The inventive method and device are described in detail below by accompanying drawing 1 and embodiment.Organic concentration is in terms of total hydrocarbon concentration in the embodiment of the present invention.
The incinerating and treating device of organic exhaust gas of the present invention is as shown in Figure 1, when there is high-concentration organic waste gas 1 to discharge, air door 5 is closed, organic exhaust gas are under the driving of Waste gas inducing equipment 3, by the organic concentration in the detection waste gas of hydrocarbon concentration in-line analyzer 6, when organic concentration is more than UEL in waste gas, close waste gas valve 8, open waste gas valve 7, high-concentration organic waste gas are by after the removing sulfide of alkali liquor absorption equipment 10, after mixing with furnace fuel 16 burning disposal is carried out into heating furnace 15, or it is directly entered the burning of the burner hearth of heating furnace 15.When organic concentration is less than UEL in waste gas, close waste gas valve 7, open waste gas valve 8, high-concentration organic waste gas are processed into diesel oil absorption equipment 9, recovery section hydrocarbons, after removing organic sulfur compound and most of hydrogen sulfide, it is ensured that organic concentration stabilization 5000-35000mg/m after treatment in waste gas3.When concentration of hydrogen sulfide is too high, supporting alkali liquor absorption equipment further removes the hydrogen sulfide in waste gas.When high-concentration organic waste gas 1 stop discharging, waste gas stream gauge 2 sends signal, opens air door 5, introduces air 4 and enters diesel oil absorption equipment 9, makes organic concentration stabilization 5000-20000mg/m after treatment in waste gas3, subsequently into heating furnace burning disposal.Organic exhaust gas after diesel oil absorption and alkali liquor absorption, concentration is 5000-35000mg/m3, through spark arrester 11, in gas mixer 13, it is sufficiently mixed with heating furnace air distribution air 12, under the driving of heating furnace gas-distributing fan 14, burning disposal is carried out into heating furnace 15.When heating furnace gas-distributing fan 14 is stopped, start emergent interlocking cut-out valve group 17-18, valve 17 is closed immediately, Open valve 18, stopping introduces exhaust gas into heating furnace, waste gas after diesel oil absorption equipment 9 and alkali liquor absorption equipment 10 are processed, through spark arrester 19 by the emergent dump of aiutage 20.
Embodiment 1
Using the processing unit and method of accompanying drawing of the present invention 1, certain refinery's Naphtha tank discharge waste gas is processed, the maximum discharge tolerance of waste gas is 300Nm3/ h, total hydrocarbon concentration is 300-800g/m3, sulfide content is relatively low, less than 10mg/m3.General naphtha explosive range is 1.1%-8.7%, and UEL is 8.7%（About 430g/m3）.
Organic concentration first in detection waste gas, when total hydrocarbon concentration is higher than UEL, can be directly entered heating furnace burning disposal, or into heating furnace burning disposal after mix with furnace fuel gas.
When total hydrocarbon concentration is less than UEL in waste gas, waste gas enters diesel oil absorption equipment, and using atmosphere 3rd side cut gas-oil, the liquid-gas ratio of absorption is 100L/m3, it is 35 DEG C to absorb temperature, and absorption pressure is 100kPa, and total hydrocarbon concentration of the diesel oil after absorbing in stable waste gas is 15000-35000mg/m3；When without discharge gas, introduce a certain amount of air and enter diesel oil absorption equipment, maintain the pressure of diesel oil absorption system, while air will carry out partial organic substances by diesel oil, total hydrocarbon concentration stabilization is in 5000-20000mg/m in making waste gas3.Maximum total hydrocarbon concentration 35000mg/m in waste gas after being absorbed with diesel oil3Adjusted, and burning disposal is carried out with the suitable existing heating furnace of air quantity with this concentration and exhausted air quantity selection, the operation operating mode of the heating furnace of selection is good, fully, the total hydrocarbon concentration in flue gas is less than 20mg/m for fuel combustion3, NOXLess than 100mg/m3, air distribution air capacity is 105000m3The heating furnace of/more than h.Total hydrocarbon concentration is less than 100mg/m after organic exhaust gas mix with air distribution air3, the oxygen demand of pollutant is 0.028% in oxidation gaseous effluent.
Waste gas after above-mentioned treatment can qualified discharge, discharge gas in total hydrocarbon concentration be less than 20mg/m3.By longtime running（More than 1 year）, heating furnace and air distribution blower fan are in normal operation, and stability and security are good.
Embodiment 2
Using the processing unit and method of accompanying drawing of the present invention 1, certain refinery's oil product pans discharge waste gas is processed, discharge amount of exhaust gas is 0-300m3/ h, total hydrocarbon concentration is 300-500g/m3, organic sulfur compound content is 500-1500mg/m3, H2S contents are 1000-8000mg/m3.The explosive range of the oil product is 2%-3%, and UEL is 3%（About 305g/m3）.
Organic concentration first in detection waste gas, when total hydrocarbon concentration is higher than UEL, can be directly entered heating furnace burning disposal, or into heating furnace burning disposal after mix with furnace fuel gas.
When total hydrocarbon concentration is less than UEL in waste gas, waste gas enters diesel oil absorption equipment, and using atmosphere 3rd side cut gas-oil, the liquid-gas ratio of absorption is 100L/m3, it is 8 DEG C to absorb temperature, and absorption pressure is 80kPa, and total hydrocarbon concentration of the diesel oil after absorbing in stable waste gas is 15000-25000mg/m3；When without discharge gas, introduce a certain amount of air and enter diesel oil absorption equipment, maintain the pressure stability of diesel oil absorption system, while air will carry out partial organic substances by diesel oil, total hydrocarbon concentration stabilization is in 5000-20000mg/m in making waste gas3.Maximum total hydrocarbon concentration 25000mg/m in waste gas after being absorbed with diesel oil3Adjusted, and burning disposal is carried out with the suitable existing heating furnace of air quantity with this concentration and exhausted air quantity selection, the operation operating mode of the heating furnace of selection is good, fully, the total hydrocarbon concentration in flue gas is less than 20mg/m for fuel combustion3, NOXLess than 100mg/m3, air distribution air capacity is 75000m3The heating furnace of/more than h.Total hydrocarbon concentration is less than 100mg/m after organic exhaust gas mix with air distribution air3, the oxygen demand of pollutant is 0.028% in oxidation gaseous effluent.
Waste gas after diesel oil absorbs enters alkali liquor absorption equipment, and using remaining hydrogen sulfide in the sodium hydroxide solution absorption waste gas of concentration 10%-15%, the organic sulfur compound concentration after absorption in waste gas is less than 50mg/m3, hydrogen sulfide content is less than 10mg/m3.Then introducing heating furnace by gas-distributing fan after mixing with air distribution air through gas mixer carries out burning disposal.
Waste gas after above-mentioned treatment can qualified discharge, discharge gas in total hydrocarbon concentration be less than 20mg/m3, SO2Concentration is less than 1
mg/m3.By longtime running（More than 1 year）, heating furnace and air distribution blower fan are in normal operation, and stability and security are good.
Embodiment 3
Using the processing unit and method of accompanying drawing of the present invention 1, certain refinery's oil product pans discharge waste gas is processed, discharge amount of exhaust gas is 0-300m3/ h, total hydrocarbon concentration is 300-600g/m3, organic sulfur compound content is 500-1000mg/m3, H2S contents are 1000-10000mg/m3.The explosive range of the oil product is 2%-3%, and UEL is 3%（About 305g/m3）.
Organic concentration first in detection waste gas, when total hydrocarbon concentration is higher than UEL, can be directly entered heating furnace burning disposal, or into heating furnace burning disposal after mix with furnace fuel gas.
When total hydrocarbon concentration is less than UEL in waste gas, waste gas enters diesel oil absorption equipment, and using atmosphere 3rd side cut gas-oil, the liquid-gas ratio of absorption is 100L/m3, it is 8 DEG C to absorb temperature, and absorption pressure is 150kPa, and total hydrocarbon concentration of the diesel oil after absorbing in stable waste gas is 10000-17000mg/m3；When without discharge gas, introduce a certain amount of air and enter diesel oil absorption equipment, maintain the pressure stability of diesel oil absorption system, while air will carry out partial organic substances by diesel oil, total hydrocarbon concentration stabilization is in 5000-15000mg/m in making waste gas3.Maximum total hydrocarbon concentration 17000mg/m in waste gas after being absorbed with diesel oil3Adjusted, burning disposal is carried out with the suitable existing heating furnace of air quantity with this concentration and exhausted air quantity selection.The operation operating mode of the heating furnace of selection is good, and fully, the total hydrocarbon concentration in flue gas is less than 20mg/m for fuel combustion3, NOXLess than 100mg/m3, air distribution air capacity is 51000m3The heating furnace of/more than h.Total hydrocarbon concentration is less than 100mg/m after organic exhaust gas mix with air distribution air3, the oxygen demand of pollutant is 0.028% in oxidation gaseous effluent.
Waste gas after diesel oil absorbs enters alkali liquor absorption equipment, and using remaining hydrogen sulfide in the sodium hydroxide solution absorption waste gas of concentration 10%-15%, organic sulfur compound concentration is less than 30mg/m in waste gas after absorption3, hydrogen sulfide content is less than 10mg/m3.Then introducing heating furnace by gas-distributing fan after mixing with air distribution air through gas mixer carries out burning disposal.
Waste gas after above-mentioned treatment can qualified discharge, discharge gas in total hydrocarbon concentration be less than 20mg/m3, SO2Concentration is less than 1
mg/m3.By longtime running（More than 1 year）, heating furnace and air distribution blower fan are in normal operation, and stability and security are good.
Comparative example 1
When the organic exhaust gas for the treatment of are dense（Higher than UEL）, preferably enter incinerator with fuel gas, therefore the organic exhaust gas that embodiment 1 is used are entered into incinerator with fuel gas.Because the total hydrocarbon concentration of the waste gas is 300-800g/m3, and waste gas mixes or is directly entered heating furnace burner hearth for intermittent discharge with fuel gas, and fuel gas fluctuation is larger, and the normal operating influence on existing heating furnace is very big, it is impossible to stable operation.
Comparative example 2
, with embodiment 2, difference is not use diesel oil to absorb, and is directly mixed with air distribution air for handling process and operating condition, if selection air distribution air quantity is 75000Nm3/ h heating furnace air distributions are burned after being sufficiently mixed into heating furnace, and the total hydrocarbon concentration after waste gas is sufficiently mixed with air distribution air is 100-2000mg/m3, although far below 25%LEL（LEL）, in the absence of potential safety hazard, but the oxygen demand needed for burning this partial contamination thing is
0.03%~0.56%, then can be very big on the normal operating of existing heating furnace influence, it is impossible to stable operation.
Comparative example 3
, with embodiment 2, difference is for handling process and operating condition, if selection is 5000Nm with air distribution air quantity3/ h heating furnace air distributions are burned after being sufficiently mixed into heating furnace, and the total hydrocarbon concentration after waste gas is sufficiently mixed with air distribution air is 300-1500mg/m3, although well below 25%LEL（LEL）, in the absence of potential safety hazard, but the oxygen consumption needed for burning this partial contamination thing is
0.08%~0.42%, can be very big on the normal operating of existing heating furnace influence, it is impossible to stable operation.
Comparative example 4
Handling process and operating condition are with embodiment 2, difference is when storage tank is without discharge gas, and do not introduce a certain amount of air, pressure in diesel oil absorption equipment cannot keep, pressure in absorption tower will likely be changed into normal pressure even tiny structure, the change of tower pressure interior force has an impact to the stable operation for absorbing oil, causes the operation of diesel oil absorption equipment to be fluctuated, it is impossible to maintain operation steady in a long-term.
Claims (14)
1. a kind of incineration treatment method of refinery's organic exhaust gas, it is characterised in that including following content：Organic concentration first in detection waste gas, when organic concentration is more than UEL, waste gas is directly entered heating furnace burning disposal；When organic concentration is less than UEL, the organic concentration that waste gas enters in diesel oil absorption equipment stabilization waste gas is 5000-35000mg/m3, and burning disposal is carried out with the suitable existing heating furnace of air quantity with this concentration and exhausted air quantity selection；When without discharge gas, introduce a certain amount of air and enter diesel oil absorption equipment, make organic concentration stabilization 5000-35000mg/m after treatment in waste gas3, subsequently into above-mentioned heating furnace burning disposal.
2. method according to claim 1, it is characterised in that：Essentially from petroleum chemical enterprise's raw material storage tank, acid water tank field, alkaline residue acidification treater discharge waste gas, the drain time and organic concentration of this kind of waste gas are in dynamic change to organic exhaust gas, and it is at concentrations up to hundreds of thousands even mg/m up to a million3。
3. method according to claim 1 and 2, it is characterised in that：When sulfide containing high concentration in waste gas, concentration is thousands of to hundreds of thousands mg/m3, supporting corresponding desulfurization equipment, by the hydrogen sulfide stripping in waste gas.
4. method according to claim 1, it is characterised in that：The suitable heating furnace of air quantity is matched somebody with somebody in selection, and maximum organic concentration is adjusted in waste gas after being absorbed with diesel oil.
5. method according to claim 1, it is characterised in that：The existing heating furnace of selection is oil refining process heating furnace, FCC waste heat boilers, burn stove, tail gas of sulphur incinerator or burn ammonia stove, and operation operating mode is good, and fully, the NMHC in flue gas is less than 20mg/m for fuel combustion3, NOXLess than 100mg/m3。
6. method according to claim 1, it is characterised in that：Diesel oil absorbent selects gas-oil, and the rich diesel oil absorbent after absorption goes hydrotreating after mixing with hydrogenating materials；It is adjusted by diesel oil absorption equipment operating parameter, organic concentration in waste gas after control absorption, main control parameters have：Liquid-gas ratio is 60-150L/m3, it is 5-40 DEG C to absorb temperature, and absorption pressure is 20-200kPaG.
7. method according to claim 1, it is characterised in that：Waste gas is introduced into gas mixer after oil absorbs, and burning disposal is carried out again after being sufficiently mixed with the air distribution air of selected heating furnace.
8. method according to claim 1, it is characterised in that：Control waste gas is less than 200mg/m with the organic concentration of heating furnace air distribution air gas mixture3, oxidation stain material consumption oxygen amount is less than 0.05%, it is ensured that the organic concentration in mixed gas is far smaller than the 25% of LEL.
9. the device of above-mentioned organic exhaust gas incineration treatment method is used for, it is characterized in that including waste gas stream gauge, air door, Waste gas inducing equipment, hydrocarbon concentration in-line analyzer, exhaust gas switching valve group, diesel oil absorption equipment, gas mixer, heating furnace gas-distributing fan and heating furnace, wherein waste gas stream gauge is used to monitor whether that discharge gas is produced, when there is discharge gas, waste gas stream gauge conveys shutdown signal to air door, when without discharge gas, flowmeter sends signal and opens air door, introduces a certain amount of air and enters diesel oil absorption equipment；Waste gas inducing equipment is used to introduce exhaust gas into diesel oil absorption equipment or heating furnace；Hydrocarbon concentration in-line analyzer with total hydrocarbon concentration in on-line monitoring waste gas, while give exhaust gas switching valve group corresponding signal, when total hydrocarbon concentration is more than UEL, open the valve that waste gas is directly discharged into heating furnace, close the valve for entering diesel oil absorption equipment；When total hydrocarbon concentration is less than UEL, unlatching enters the valve of diesel oil absorption equipment, and closing is discharged into the valve of heating furnace；Diesel oil absorption equipment is used to reclaim organic matter in waste gas, removes organic sulfur compound and partial vulcanization hydrogen, and after ensureing to absorb in waste gas organic concentration stabilization in 5000-35000mg/m3；Waste gas mixes with heating furnace air distribution air proportion after gas mixer is used to absorb, and organic concentration is less than 200mg/m after making mixing3, oxidation stain material consumption oxygen amount is less than 0.05%；Gas sends into heating furnace burning disposal, purified gas qualified discharge by heating furnace gas-distributing fan after mixing.
10. device according to claim 9, it is characterised in that：When there is waste gas to discharge, in respect of flow indication, conveying shutdown signal is to air door for exhaust gas flow；When non-exhaust emission, waste gas stream gauge sends signal, opens air door, introduces a certain amount of air and enters diesel oil absorption equipment, maintain the stabilization of diesel oil absorption equipment pressure, and ensure diesel oil absorb after organic concentration in waste gas be basically stable at 5000-35000mg/m3。
11. devices according to claim 9, it is characterised in that：Diesel oil absorption equipment uses material filling type absorption tower, and inner-tower filling material is conventional structured packing.
12. devices according to claim 9, it is characterised in that：When sulfide containing high concentration in waste gas, further supporting corresponding desulfurization equipment realizes the thorough removing of hydrogen sulfide.
13. devices according to claim 9, it is characterised in that：Emergent interlocking cut-out valve group and aiutage are installed on the pipeline before gas mixer and on the outer comb line of diesel oil absorption equipment, when heating furnace air distribution blower fan stops, emergency switching-off valve group carries out interlocking switching, cut-out enters the valve group of gas mixer, waste gas is opened to aiutage valve group, waste gas is directly discharged by aiutage.
14. devices according to claim 9, it is characterised in that：Spark arrester is set on pipeline before diesel oil absorption equipment discharge waste gas mixes with air distribution air and on discharge waste gas to the pipeline of aiutage, strengthens stability and security.
Priority Applications (1)
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| CN108303500A (en) * | 2018-02-01 | 2018-07-20 | 新安洁环境卫生股份有限公司 | It is a kind of that there is intelligent measurement, explosion-proof and deodorization functions vehicle |
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| CN109099445A (en) * | 2018-10-31 | 2018-12-28 | 江苏师范大学 | A kind of incinerator of industrial waste gas |
| CN109185901A (en) * | 2018-10-15 | 2019-01-11 | 南京工业大学 | A kind of flare gas recovery processing system and its recovery and treatment method for power generation |
| CN110274251A (en) * | 2019-06-20 | 2019-09-24 | 山东京博石油化工有限公司 | A kind of exhaust of oil processing system |
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| CN106765210B (en) | 2018-08-14 |
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