A kind of oily sandy sludge harmless treatment process and device
Technical field:
The present invention relates to the treatment process and the equipment of oily sandy sludge in crude oil production, the oil refining production process, especially a kind of oily sandy sludge harmless treatment process and device.
Background technology:
At present, in crude oil production, oil refining production process, produce a large amount of oily sandy sludges inevitably.These oily sandy sludge complex shapes, variforms such as solid-state, semi-solid state, fluidization pulpous state have been comprised, complicated component, contain multiple compositions such as crude oil, water, chemical assistant, decompose fully under the natural condition and need the years up to a hundred, naturally do not stack if do not take effective treatment measures or bury, not only directly take a large amount of soils and space, and severe contamination air, soil and underground water.The existing method of handling oily sandy sludge except that stacking naturally and burying, in addition burning method, solidification method, composite fertilizer's method, re-injection method, washing oil method, microbial method, plough treatment process and methods such as method, cracking process, different defectives is all arranged.
Burning method is directly to burn under extra fuel gas or deep-fried twisted dough sticks spare with fluidized-bed or rotary kiln, and working cost height, the heat energy of generation are difficult to utilize, and equipment failure rate is higher; The also employing that has is directly mixed oily sandy sludge in the coal dust or is made moulded coal in the sawdust or be used as and bake bricks fuel or be used as generating; Crude oil is highly seasoned when doing the moulded coal burning, and the user is reluctant to use; The interior fuel of directly doing to bake bricks can produce a large amount of splitting gases reduces brick intensity; As bake bricks outer fuel or generating, because of self or with reasons such as the easy conglomeration of coal dust, calorific value be low, moisture, the user also is reluctant to use.
Solidification method is an agglutinating value(of coal) of utilizing silicate, and oily sandy sludge is cured as building block, temporarily greasy filth is enclosed in the particular space.Because it is common non-burning brick that this method cost is higher than, and only be only applicable to oil-containing, oily sandy sludge that water is low, therefore be difficult to apply.
Composite fertilizer's method is oily sandy sludge and chemical fertilizer, agricultural fertilizer etc. directly to be used behind the heap fermentation by a certain percentage or dry, granulation is sold, because the no any fertilizer efficiency of oily sandy sludge itself, produce, transportation cost is higher, the user is reluctant to use, and composite fertilizer's region is strong, sales difficulty is difficult to the mass consumption oily sludge.
The re-injection method is that oily sludge is stirred to mud again, the profile control face is treated in down-holes, injection oil field such as adding dispersion agent, or as water shutoff material, or injection waste oil well, this method not only is difficult to consume a large amount of mud, and mud chiltern amount, granularity etc. are had relatively high expectations, compare the cost height with other regulating section of oil wells methods, be difficult to apply.
The washing oil method is to utilize washing composition, alkali with the recycling of getting off of the former oil wash in the oily sandy sludge, generally as the interim treatment process of oily sandy sludge at the bottom of the oil tank.Because of its can not handle the low oil-containing mud sand of oil-containing, ageing oil silt particle, with the flocculation agent more oil sludge and sand of the flocculation oil-containing mud sand that produces and asphaltenes, colloid etc. of disposing of sewage, and the silt residue oleaginousness after handling is higher, surpass and efflux environmental requirement, cause secondary pollution, the crude oil that obtains after the processing is impure also more, therefore be worth lowlyer, very big defective is arranged in actual applications.
Microbial method and the ground method of ploughing are that oily sludge is sprinkling upon in ground or the earth, and with itself and mixing with soil, the spontaneous microorganism in the dependence soil or the excellent species of artificially breeding decompose organism; Higher because of this method processing cost, be subjected to factor affecting such as envrionment temperature, decomposition rate is slow, and method is ploughed on ground also has potential danger to atmosphere, underground water, has been limited to use, and therefore is difficult to large-scale promotion application.
Cracking process divides closed cracking process and limit oxygen burning cracking process; The closed cracking process is the oily sandy sludge that utilizes in the heat encloses container, makes its organic substance be decomposed into the oil gas and the carbon residue that contains heavy oil of recyclable utilization; Because of this method adopts still formula or tower rhythmic reaction, be subjected to current material performance and the low restriction of oily sandy sludge heat transfer efficiency to be difficult to make the oily sandy sludge in the big volume encloses container to reach coking temperature, residue after the processing does not reach the environment protection emission requirement, treatment capacity is little, poor stability, handle the low oily sandy sludge cost height of oil-containing, be difficult to realize heavy industrialization processing oily sandy sludge, therefore this method only only limits to research usefulness in the testing laboratory, be difficult to form industrialized treatment method, apply difficulty; Limit oxygen combustion method is to adopt similar resinous shale, coal system oil tech, allows the part oily sandy sludge burn by the oily sandy sludge of piling up in specific device self cracking, the required heat energy of coking are provided; Because oily sandy sludge complex shape, granularity is little, be difficult to resemble the accumulation mode that is formed with good strength, gap etc. resinous shale, the coal, this method need be done complicated pretreatment and forming processes to oily sandy sludge, the cracked oil yield is low, poor stability, can't handle the oily sandy sludge that contains innage, the processing cost height, investment in fixed assets is big, the equipment complexity, be difficult to realize heavy industrialization processing oily sandy sludge, therefore this method only only limits to research usefulness in the testing laboratory, is difficult to form industrialized treatment method, applies difficulty.
Summary of the invention:
Do not reach in order to overcome residue after existing cracking process handling oil mud sand is handled that environment protection emission requires, treatment capacity is little, poor stability and be difficult to realize the deficiency of industrial treatment, the invention provides a kind of oily sandy sludge harmless treatment process and device, this technology and specific equipment can be handled all kinds of oily sandy sludges, realize the oily sandy sludge resource utilization, cracked oil rate of recovery height, safe and reliable, processing cost is low, fixed investment is few, processing cost is low, and non-secondary pollution satisfies environmental requirement, apply easily, can realize extensive continuous industry production.
Technical scheme of the present invention is: a kind of oily sandy sludge harmless treatment process, comprise chilling tripping device, cracked oil storing unit, pressurizing device, Safety water seal device and combustion chamber, and this technology is carried out according to the following steps:
A, pre-treatment, with oily sandy sludge dewater, fragmentation;
B, heating, will be pretreated oily sandy sludge add in the cracker and heat, oily sandy sludge is broken down into mixed gas and innocent residue two greatly mutually;
C, mixture gas treatment, mixed gas is through over-quenching tripping device condensation formation oil, water and non-condensable gas, oil, water enter the cracked oil storing unit, non-condensable gas enters combustion chambers burn through pressurizing device, Safety water seal device successively, and the harmless flue gas of formation is discharged into the atmosphere through the smoke outlet on the cracker; Non-condensable gas is mainly the lower molecular weight hydrocarbon polymer that crack crude produces, and flue gas is carbonic acid gas and water vapour.
D, innocent residue treatment are discharged by the discharge port of innocent residue in slag removing chamber that cracker is separated.
Described Heating temperature scope is between 200 ℃~1000 ℃.
For the cracker of realizing that above-mentioned technology is used, comprise housing, have the outlet of opening for feed and splitting gas on the housing, housing places in the lagging casing, has between housing and the lagging casing to isolate to support, and isolates to support to have passage, housing is built-in with spiral conveyer, housing communicates with slag removing chamber, has thermal source mouth and smoke outlet on the lagging casing, and soft seal is all adopted in the contact position of housing and lagging casing.
Be fixed with chopping mechanism and grid on the opening for feed of described housing, the exit end of housing places in the outer support that is fixed on outside the slag removing chamber, between housing and the support refractory seals filler is arranged, and between splitting gas outlet and the lagging casing soft sealed packing is arranged.
Described spiral conveyer is made up of axle and screw-blade, screw-blade is fixed on the axle, one end of axle is connected on the drive shaft, and the two ends of axle place respectively in the sealed letter that is fixed on outside housing and the slag removing chamber, between two sealed letters and the axle refractory seals filler is arranged all.
Described axle is tubular shaft with drive shaft, in hollow axle inside thermal source is arranged.
Described slag removing chamber comprises slag removing chamber's shell, has level meter, splitting gas outlet, discharge port and venting on slag removing chamber's shell, and the residue spiral conveyer that communicates with discharge port is arranged at slag removing chamber shell bottom, and the residue spiral conveyer links to each other with power set.
Described slag removing chamber internal fixing has the water jet standpipe that communicates with the external pressure water source.
Described thermal source mouth below is connected with the combustion chamber, and the Chang Ran naked light that ignites is arranged in the combustion chamber.
The present invention has following beneficial effect: take above-mentioned a kind of oily sandy sludge harmless treatment process, can form a kind of extensive continuous industry production, make the organic substance in the oily sandy sludge be decomposed into recyclable utilization, cracking oil gas and innocent residue that economic worth is high, make the oily sandy sludge non-secondary pollution after the processing, reclaimed the valuable energy when satisfying environmental requirement, has good economic benefit, can replace prior art to handle the oily sandy sludge of existing all kinds of various forms, thoroughly solve its environmental pollution problem, have good environmental benefit and social benefit.This technology can make full use of self contained energy, energy consumption and working cost are low, have realized the oily sandy sludge resource utilization, cracked oil rate of recovery height, safe and reliable, processing cost is low, and fixed investment is few, and processing cost is low, non-secondary pollution, satisfy environmental requirement, apply easily, can realize extensive continuous industry production.
Owing to adopted special-purpose cracker, housing wherein is built-in with spiral conveyer, make above-mentioned technology be easier to extensive continuous industry production, this cracker meets safe and reliable airtight cracking and the incorporate processing requirement of coking, solves the practicability problem of this key equipment of cracker.
Description of drawings:
Accompanying drawing 1 is a process flow sheet of the present invention;
Accompanying drawing 2 is structural representations of cracker 1 among Fig. 1.
1-cracker among the figure, 2-chilling tripping device, 3-cracked oil storing unit, the 4-pressurizing device, 5-Safety water seal device, 6-combustion chamber, the 7-smoke outlet, 8-housing, 9-opening for feed, the outlet of 10-splitting gas, 11-spiral conveyer, 12-lagging casing, 13-thermal source mouth, 14-isolates support, the 15-passage, 16-slag removing chamber, 17-chopping mechanism, 18-grid, the 19-axle, 20-screw-blade, 21-drive shaft, the 22-sealed letter, 23-refractory seals filler, 24-thermal source, 25-slag removing chamber shell, 26-level meter, 27-venting, 28-residue spiral conveyer, 29-water jet standpipe, the big sealed letter of 30-, 31-power set, 32-soft sealed packing, the 33-naked light that ignites, the 34-discharge port, the 35-interchanger.
Embodiment:
The invention will be further described below in conjunction with the drawings and the specific embodiments:
A kind of oily sandy sludge harmless treatment process as shown in Figure 1, comprises chilling tripping device 2, cracked oil storing unit 3, pressurizing device 4, Safety water seal device 5 and combustion chamber 6, and this technology is carried out according to the following steps:
A, pre-treatment, with oily sandy sludge dewater, fragmentation; With the oily sandy sludge prior art pre-treatment that needs are handled, oily sandy sludge wherein relatively large or that viscosity is stronger can utilize the chopping mechanism chopping.
B, heating, pretreated oily sandy sludge is added opening for feed 9, enter cracker 1, oily sandy sludge is rolling in cracker 1 under the effect of spiral conveyer 11 to slag removing chamber's 16 motions, meanwhile oily sandy sludge accept housing 8 external from thermal source heat and spiral conveyer 11 on the heat of hollow axle 19 endogenous pyrogens, the Heating temperature scope is generally between 100 ℃~1000 ℃, cracker 1 internal pressure scope is between-0.1~1.0MPa, and cracker 1 internal pressure generally is controlled at pressure-fired.Evaporated moisture, lighter hydrocarbons in the oily sandy sludge before this in this process, begin processes such as distillation, shallow degree cracking, deep pyrolytic, coking then successively, the cracking top temperature generally is controlled at 550 ℃~750 ℃, contained organism is cracked into till carbon granules and the splitting gas in oily sandy sludge, and it is big mutually that oily sandy sludge is broken down into mixed gas and innocent residue two.Cracking heat is provided by hot blast, flame or the alternate manner that combustion chamber 6 produces, and hot blast, flame or alternate manner and cracking housing contacts portion temperature should be controlled at below 1000 ℃.After the high-temperature gas of tubular shaft 19 endogenous pyrogens on the internal screw conveyors 11 or flame were passed to oily sandy sludge in the housing 8 with most of heat by axle 19, tubular shaft 19 rear ports of spiral conveyer 11 entered atmosphere internally.
C, mixture gas treatment, mixed gas through after interchanger 35 heat exchange again through chilling tripping device 2 condensations formation oil, water and non-condensable gas, the heat that obtains after the heat exchange can be used for the air intake of preheating process furnace or to outside hot-water supply etc., oil, water enter cracked oil storing unit 3, non-condensable gas enters combustion chamber 6 burnings through pressurizing device 4, Safety water seal device 5 successively, the lower molecular weight hydrocarbon polymer that the non-condensable gas main component produces for the crude oil Pintsch process, the non-condensable gas flue gas main component that 6 internal combustion produce in the combustion chamber is carbonic acid gas and water vapour.
Chilling tripping device 2 can use the mode of spraying or spray chilling to make the oil gas cooling, realizes that profit separates with non-condensable gas.Oil in the chilling tripping device 2, water enter in the cracked oil storing unit 3 under artificial or the control of float liquid level setter.
Pressurizing device 4 is realized cracker and the pressure-controlling of chilling tripping device 2 and the conveying of non-condensable gas.
Safety water seal device 5 can make the non-condensable gas safe combustion, avoids tempering to produce blast, is provided with and exhausted normal combustion naked light, major-minor burning things which may cause a fire disaster or the thermal source of cracker 1 interior oil air bound in combustion chamber 6, guarantees that the safety of non-condensable gas reclaims burning, has reduced the energy consumption of this technology.
Chilling tripping device 2, cracked oil storing unit 3, pressurizing device 4, Safety water seal device 5 and combustion chamber 6 are existing apparatus, and each installs concrete structure and repeats no more herein.
D, innocent residue treatment, the major ingredient of the residue that cracker 1 is separated are not oil-containing mud sand and carbon granules, and the discharge port 34 of this innocent residue in slag removing chamber 16 discharged.Residue enters slag removing chamber 16, under the effect of residue spiral conveyer 28, discharges through discharge port 34, and residue further is being used as starting material such as pave the way after the oxidation under waste heat and the oxygen effect; Can utilize water that residue is sprayed this moment, and the water vapour of generation and water-gas are discharged and returned in the cracker 1 from the splitting gas outlet 10 of the upper end of slag removing chamber 16, and cooled residue is discharged through residue spiral conveyer 28 and discharge port 34 again.
Utilize this technology can form a kind of extensive continuous industry production, make organic substance in the oily sandy sludge be decomposed into recyclable utilization, cracking oil gas and innocent residue that economic worth is high, make the oily sandy sludge non-secondary pollution after the processing, reclaimed the valuable energy when satisfying environmental requirement, has good economic benefit, can replace prior art to handle the oily sandy sludge of existing all kinds of various forms, thoroughly solve its environmental pollution problem, have good environmental benefit and social benefit.This technology can make full use of self contained energy, energy consumption and working cost are low, have realized the oily sandy sludge resource utilization, cracked oil rate of recovery height, safe and reliable, processing cost is low, and fixed investment is few, and processing cost is low, non-secondary pollution, satisfy environmental requirement, apply easily, can realize extensive continuous industry production.
This technology can also be used to the oily sandy sludge handling municipal sludge sand, the chemical engineering sludge sand that other contains organic matter except handling, and makes it thoroughly innoxious, and makes it become a kind of good fuel oil gas raw materials for production; Also can be used for handling other oleaginous materials such as resinous shale, tar sand etc., make it thoroughly innoxious, and make it become a kind of good fuel oil gas raw materials for production; Also can be used for handling other waste,, make it thoroughly innoxious, and make it become a kind of good oil fuel, fuel gas raw materials for production or charing raw material as straw, bagasse etc.
For the cracker of realizing that above-mentioned technology is used, as shown in Figure 2, comprise housing 8, have opening for feed 9 and splitting gas outlet 10 on the housing 8, housing 8 places in the lagging casing 12, have between housing 8 and the lagging casing 12 to isolate and support 14, isolate to support on 14 having passage 15, housing 8 is built-in with spiral conveyer 11, and housing 8 communicates with slag removing chamber 16, have thermal source mouth 13 and smoke outlet 7 on the lagging casing 12, housing 8 all adopts soft seal with the contact position of lagging casing 12.
During actual the use, oily sandy sludge enters in the housing 8 from opening for feed 9, spiral conveyer 11 rotates and makes oily sandy sludge movement continuously in housing 8, stirring, realizes that oily sandy sludge enters and derive the purpose of housing 8, has also solved the slow-footed problem of static oily sandy sludge internal heat transfer simultaneously.
Embodiment 1
Used cracker in a kind of oily sandy sludge harmless treatment process as shown in Figure 2, comprises housing 8, has opening for feed 9 and splitting gas outlet 10 on the housing 8, and housing 8 is selected the high-temperature refractory steel manufacturing for use, has better heat-resisting intensity and heat-conductive characteristic.Be fixed with chopping mechanism 17 and grid 18 on the opening for feed 9 of housing 8, can shred the bulk oily sandy sludge solid that intensity is higher or viscosity is extremely strong, avoid its obstruction, damage internal screw conveyors 11.Housing 8 places in the lagging casing 12, lagging casing 12 can make oily sandy sludge be incubated heating in housing 8, have between housing 8 and the lagging casing 12 to isolate and support 14, isolate to support on 14 and have passage 15, housing 8 is built-in with spiral conveyer 11, spiral conveyer 11 is made up of axle 19 and screw-blade 20, and screw-blade 20 forces to strike off oily sandy sludge and the residue that sticks on housing 8 inwalls, solves the problem that oily sandy sludge and residue thermal resistance are big, housing 8 temperature requirements are high.Screw-blade 20 is fixed on the hollow axle 19, and there is thermal source 24 axle 19 inside, have improved the heating efficiency to oily sandy sludge, has also avoided some oily sandy sludge to stick on the outer wall of axle 19 simultaneously.One end of axle 19 is connected on the drive shaft 21, and the two ends of axle 19 place respectively in the sealed letter 22 that is fixed on outside housing 8 and the slag removing chamber 16, between two sealed letters 22 and the axle 19 refractory seals filler 23 are arranged all, have realized the rotary seal of axle 19.Housing 8 communicates with slag removing chamber 16, in the housing 8 after processes such as distillation, shallow degree cracking, deep pyrolytic, coking remaining residue enter in the slag removing chamber 16, have thermal source mouth 13 and smoke outlet 7 on the lagging casing 12, thermal source mouth 13 belows are connected with combustion chamber 6, can use geseous fuel in the combustion chamber 6, available liquid or solid fuel, when using geseous fuel, the Chang Ran naked light 33 that ignites is arranged in the combustion chamber 6, the flame of fuel combustion and flue gas enter annular space between housing 8 and the lagging casing 12 from thermal source mouth 13, and housing 18 is heated.Slag removing chamber 16 comprises slag removing chamber's shell 25, have level meter 26, splitting gas outlet 10, discharge port 34 and venting 27 on slag removing chamber's shell 25, the residue spiral conveyer 28 that communicates with discharge port 34 is arranged at slag removing chamber's shell 25 bottoms, and residue spiral conveyer 28 links to each other with power set 30.
Embodiment 2
As shown in Figure 2, on the basis of embodiment 1, the exit end of housing 8 places in the big sealed letter 30 that is fixed on outside the slag removing chamber 16, between housing 8 and the big sealed letter 30 refractory seals filler 23 is arranged, the exit end of housing 8 can slide in big sealed letter 30, between splitting gas outlet 10 and the lagging casing 12 soft sealed packing 32 is arranged, avoid housing 8 to damage lagging casing 12 because of expanding with heat and contract with cold.
Embodiment 3
As shown in Figure 2, on the basis of embodiment 1 or 2, level meter 26, splitting gas outlet 10, discharge port 34 and venting 27 are installed on slag removing chamber's shell 25 of slag removing chamber 16, the residue spiral conveyer 28 that communicates with discharge port 34 is arranged at slag removing chamber's shell 25 bottoms, and residue spiral conveyer 28 links to each other with power set 30.The water jet standpipe 29 that communicates with the external pressure water source is arranged at slag removing chamber's 16 internal fixing, spray water in right amount to hot-engine sludge and to produce water vapour and water-gas, make water vapour can with just contact at cracked high temperature oily sandy sludge, under the effect of oily sandy sludge self natural catalyst, improved the cracked oil yield, reduce carbon residue content, increased non-condensable gas output, also solved the problem of dust pollution simultaneously.
Above-mentioned cracker, combustion chamber, chilling tripping device, supply and drain water system, non-condensable gas pressurizing device, Safety water seal device, cracked oil storing unit etc., and the accident blowdown system connects by pipeline and pipe fitting.