CN212127929U - Processing system of oily sludge - Google Patents
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- CN212127929U CN212127929U CN202020635966.3U CN202020635966U CN212127929U CN 212127929 U CN212127929 U CN 212127929U CN 202020635966 U CN202020635966 U CN 202020635966U CN 212127929 U CN212127929 U CN 212127929U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Treatment Of Sludge (AREA)
Abstract
The utility model provides a processing system of oiliness mud, the system includes: the deep oxidation unit comprises an incinerator, and the drying fractionation unit comprises a drying fractionation all-in-one machine, a washing cooler, a washing heat exchanger and an oil storage tank; the drying and fractionating integrated machine is characterized in that a dried oil sludge outlet of the drying and fractionating integrated machine is connected with an inlet of the incinerator through a pipeline, an oil gas outlet of the drying and fractionating integrated machine is connected with an inlet of the washing cooler through a pipeline, and an outlet of the washing cooler is connected with an inlet of the oil storage tank through a pipeline; and a washing hot water outlet of the washing cooler is connected with the washing heat exchanger through a pipeline so as to exchange heat for the washing hot water discharged by the washing cooler. The system can maximally utilize the heat energy of the oil sludge, recover oil products to the maximum extent, realize harmless and ultimate treatment of the oil-containing sludge, and has high treatment efficiency and low cost.
Description
Technical Field
The utility model relates to a processing system of oiliness mud belongs to oil field, petrochemical, the useless environmental protection technology field of danger.
Background
The oily sludge refers to sludge generated in the processes of exploitation, transportation, storage and processing of petroleum, and comprises tank bottom sludge, oil sludge falling to the ground, sludge generated in a sewage treatment plant, oil sludge overflowing due to production accidents and the like. The oily sludge has complex components and contains a large amount of aged crude oil, asphaltene, sulfide, bacteria, acid gas, various salts, corrosive substances, benzene series substances, phenols, anthracene and other substances with high toxicity (Lijun, Luasia, butyl, Sa. the current situation analysis of the treatment of oily sludge at home and abroad [ J ] energy environmental protection, 2007, 21(5): 12-14). Because the treatment mode is rough (simple treatment or landfill) in the last decades, about tens of millions of tons of historical oil sludge needs to be treated urgently. The new increment in China is about 300-400 ten thousand tons every year, and if the oily sludge is not effectively treated in time, not only the crude oil resource is wasted, but also the soil, the water quality, the atmosphere and the health of people are polluted.
In recent years, a plurality of methods for treating oily sludge appear, including a hot washing method, a hot phase separation method, a solvent extraction method, a microbiological method, an ultrasonic method, an incineration method and the like, but the methods cannot be widely popularized and implemented due to the defects of high cost, incapability of recycling crude oil, easiness in causing secondary pollution and the like.
Wherein, the chemical hot washing method is a treatment process of realizing three-phase separation of oil, water and solid by jointly acting a chemical agent and hot water on the oily sludge to reduce the viscosity of the oily sludge; the method has the advantages of simple and reliable flow operation and high oil recovery rate; the disadvantages are that chemical agents need to be added, the screening of the chemical agents and process parameters has certain difficulty, and the treatment method can cause secondary pollution.
The thermal phase separation method is a treatment process for converting, separating and recovering an oil phase by processes of distillation, thermal decomposition, condensation and the like under the condition of oxygen isolation and high temperature of the oily sludge, and finally realizing the recycling, reduction and harmlessness of the sludge. The method has the advantages that the recovery rate of the oil content is high, and the oily sludge is thoroughly treated; the defects of indirect discontinuity, low efficiency, high safety risk and high energy consumption.
The ultrasonic method is to treat the oily sludge by adopting ultrasonic waves, and has the advantages that the ultrasonic waves can kill bacteria and viruses and decompose toxic substances in the sludge; the sludge reduction effect is obvious, the sludge treatment efficiency is high, and the speed is high; but different ultrasonic parameters are required to be selected for different oily sludge; the ultrasonic treatment of the oily sludge is mostly in an experimental stage, the industrial application is few, deep system research is lacked, and the method has obvious defects.
The solvent extraction method has the advantages that the treatment is relatively thorough, most of petroleum substances can be recycled, and trace harmful substances can be effectively removed; the process is simple and rapid, and the selectivity is high; the defects that an extracting agent with high efficiency, no public hazard and small potential safety hazard is lacked; the loss of the extractant is large, and potential safety hazards exist in the recovery process of the extractant; the cost of the extractant is high.
The biological treatment method is a process for removing petroleum hydrocarbon by utilizing a mechanism that microorganisms take the petroleum hydrocarbon as a carbon source to carry out biological metabolism and convert the petroleum hydrocarbon into inorganic substances such as water, carbon dioxide and the like; the method has the advantages that the petroleum hydrocarbon is converted into harmless soil components through a natural process; the operation cost is low; the disadvantage of this method is the difficulty of strain cultivation; the purification period is long, and the influence of weather is large; the dirty oil is not recycled, which causes the waste of resources; has poor effect on treating cycloalkanes and aromatics and is easy to cause secondary pollution.
The direct combustion or the mixed combustion refers to a process of fully combusting and thoroughly decomposing the oily sludge under the conditions of high temperature and oxygen enrichment; the treatment method has the advantages that the treatment is thorough, and the reduction rate can reach about 95 percent; most of the organic matter can be decomposed in the combustion process; the problem of foul smell of the oil sludge is solved; the disadvantages of the method are that the heat energy is not fully utilized; the equipment and operation costs are expensive; a large amount of combustion improver is consumed; the subsequent flue gas treatment with large wet flue gas amount increases the cost.
The oil content in the dry slag obtained after the oily sludge is respectively treated by adopting the various oily sludge treatment methods is still high, and the dry slag needs to be subjected to secondary treatment for further oil removal.
Meanwhile, oily sludge is divided into HW08 hazardous waste, oily sludge treatment becomes a major focus of attention of the national environmental protection industry, and harmless disposal of oily sludge is a requirement of the oil field and petrochemical environmental protection industries. However, it is difficult to treat the oil sludge to achieve final treatment only by one of the prior art, and even if the treated dry slag can reach the standard, the treatment cost is high.
Therefore, providing a novel treatment system and process for oily sludge has become a technical problem to be solved in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a processing system of oiliness mud. The system provided by the utility model can fundamentally solve the final disposal problem of the oily sludge while taking into account the economic benefits.
In order to achieve the above object, the present invention provides a processing system for oily sludge, wherein the processing system for oily sludge comprises: the deep oxidation unit comprises an incinerator, and the drying fractionation unit comprises a drying fractionation all-in-one machine, a washing cooler, a washing heat exchanger and an oil storage tank;
the drying and fractionating integrated machine is characterized in that a dried oil sludge outlet of the drying and fractionating integrated machine is connected with an inlet of the incinerator through a pipeline, an oil gas outlet of the drying and fractionating integrated machine is connected with an inlet of the washing cooler through a pipeline, and an outlet of the washing cooler is connected with an inlet of the oil storage tank through a pipeline; and a washing hot water outlet of the washing cooler is connected with the washing heat exchanger through a pipeline so as to exchange heat for the washing hot water discharged by the washing cooler.
In the system described above, preferably, an outlet of the oil storage tank and an outlet of the non-condensable gas of the scrubber cooler are connected to an inlet of the incinerator through pipes, respectively.
Preferably, the system further comprises a tail gas treatment unit, wherein the tail gas treatment unit comprises high-temperature dust removal equipment, a heat medium heat exchanger, a quenching chamber, an air preheater, a bag-type dust remover and a desulfurization comprehensive tower;
and a flue gas outlet of the incinerator is connected with an inlet of the integrated desulfurization tower through a high-temperature dust removal device, a heat medium heat exchanger, a quenching chamber, an air preheater and a bag-type dust remover in sequence through pipelines.
In the system described above, preferably, the heat medium heat exchanger is further connected to the drying and fractionating all-in-one machine, so as to exchange heat with the raw material in the drying and fractionating all-in-one machine.
In the above system, preferably, the heat-exchanged air outlet of the air preheater is connected to the inlet of the incinerator through a pipeline, so as to provide the incinerator with air required for drying sludge incineration.
Preferably, the system further comprises a hot washing unit, wherein the hot washing unit comprises a sludge storage pool, a primary hot washing pool, a final hot washing pool and a centrifugal separation device; an outlet of the oil sludge storage pool is connected with an inlet of the centrifugal separation equipment through a primary hot washing pool and a final hot washing pool in sequence through pipelines, and a water outlet of the centrifugal separation equipment is connected with the oil sludge storage pool through a pipeline; the hot oil sludge washing outlet of the centrifugal separation equipment is connected with the inlet of the drying and fractionating integrated machine through a pipeline; the hot washing oil outlet of the final-electrode hot washing tank is connected with the oil storage tank through a pipeline;
and a washing hot water outlet of the washing cooler is also connected with an inlet of the primary hot washing pool through a pipeline, and the washing heat exchanger is also respectively connected with the oil sludge storage pool, the primary hot washing pool and the final hot washing pool and used for respectively exchanging heat with the oil sludge storage pool, the primary hot washing pool and the final hot washing pool.
Preferably, the system further comprises dust collecting means for collecting dust generated in the system.
Preferably, the system further comprises a tail gas treatment unit, wherein the tail gas treatment unit comprises high-temperature dust removal equipment, a heat medium heat exchanger, a quenching chamber, an air preheater, a bag-type dust remover and a desulfurization comprehensive tower;
the flue gas outlet of the incinerator is connected with the inlet of the integrated desulfurization tower through a high-temperature dust removal device, a heat medium heat exchanger, a quenching chamber, an air preheater and a bag-type dust remover in sequence through pipelines;
the system also comprises a hot washing unit, wherein the hot washing unit comprises an oil sludge storage pool, a primary hot washing pool, a final hot washing pool and centrifugal separation equipment; an outlet of the oil sludge storage pool is connected with an inlet of the centrifugal separation equipment through a primary hot washing pool and a final hot washing pool in sequence through pipelines, and a water outlet of the centrifugal separation equipment is connected with the oil sludge storage pool through a pipeline; the hot oil sludge washing outlet of the centrifugal separation equipment is connected with the inlet of the drying and fractionating integrated machine through a pipeline; the hot washing oil outlet of the final-electrode hot washing tank is connected with the oil storage tank through a pipeline;
and a washing hot water outlet of the washing cooler is also connected with an inlet of the primary hot washing pool through a pipeline, and the washing heat exchanger is also respectively connected with the oil sludge storage pool, the primary hot washing pool and the final hot washing pool and used for respectively exchanging heat with the oil sludge storage pool, the primary hot washing pool and the final hot washing pool.
Preferably, the system further comprises a tail gas treatment unit, wherein the tail gas treatment unit comprises high-temperature dust removal equipment, a heat medium heat exchanger, a quenching chamber, an air preheater, a bag-type dust remover and a desulfurization comprehensive tower;
the flue gas outlet of the incinerator is connected with the inlet of the integrated desulfurization tower through a high-temperature dust removal device, a heat medium heat exchanger, a quenching chamber, an air preheater and a bag-type dust remover in sequence through pipelines;
the system also comprises a hot washing unit, wherein the hot washing unit comprises an oil sludge storage pool, a primary hot washing pool, a final hot washing pool and centrifugal separation equipment; an outlet of the oil sludge storage pool is connected with an inlet of the centrifugal separation equipment through a primary hot washing pool and a final hot washing pool in sequence through pipelines, and a water outlet of the centrifugal separation equipment is connected with the oil sludge storage pool through a pipeline; the hot oil sludge washing outlet of the centrifugal separation equipment is connected with the inlet of the drying and fractionating integrated machine through a pipeline; the hot washing oil outlet of the final-electrode hot washing tank is connected with the oil storage tank through a pipeline;
the washing heat exchanger is also respectively connected with the oil sludge storage pool, the primary hot washing pool and the final hot washing pool for respectively exchanging heat with the oil sludge storage pool, the primary hot washing pool and the final hot washing pool;
the system also includes a dust collection device for collecting dust generated in the system.
In the system, the used oil sludge storage tank, the primary hot washing tank, the final-stage hot washing tank, the centrifugal separation equipment, the drying and fractionation all-in-one machine, the washing cooler, the oil storage tank, the washing heat exchanger, the incinerator, the heat medium heat exchanger, the quenching chamber, the air preheater, the bag-type dust remover, the desulfurization comprehensive tower and the like are conventional equipment in the field.
The system can be applicable to the processing that multiple different technology carried out oily sludge, it is further right the utility model discloses a system explains, the utility model discloses still provide and use the utility model discloses a system carries out the technology of handling to oily sludge, the technology includes following step:
(1) drying and fractionating the pretreated oily sludge to obtain oil gas and dried oil sludge;
(2) and carrying out incineration treatment on the dried oil sludge to obtain dry slag.
In the above process, the oily sludge includes one or more of ground sludge, tank bottom sludge, refined sludge, drilling debris and drilling mud.
When the oil content of the oily sludge is not lower than 15 wt%, the process also comprises the steps of performing hot washing treatment on the pretreated oily sludge before the step (1), and performing drying and fractionation treatment on the oily sludge after the hot washing treatment;
further, the process also comprises the step of adding a demulsifier into the pretreated oily sludge and then carrying out hot washing treatment;
further, the demulsifier comprises one or more of an SP-type demulsifier, an AP-type demulsifier, an AE-type demulsifier, an AR-type demulsifier and an alkaline inorganic base.
The SP demulsifier, the AP demulsifier, the AE demulsifier, the AR demulsifier, the alkaline inorganic base and the like used by the utility model are conventional substances which can be obtained commercially; furthermore, the utility model discloses it is right the quantity of demulsifier does not do the concrete requirement, and the used quantity of demulsifier can be rationally adjusted according to the field work needs and the nature of the oily sludge of reference pending to the technical staff in this field.
In the above-mentioned process, the pretreatment is a conventional technical means in the field, and a person skilled in the art can select a suitable pretreatment device and operation to pretreat the oily sludge according to actual operation needs on site, for example, in a specific embodiment of the present invention, the pretreatment includes crushing the oily sludge and then sieving the oily sludge.
In the above process, the pretreated oily sludge can be subjected to centrifugal separation in the hot washing treatment to separate oil, water and solids, so as to recover most of oil products;
in addition, the temperature in the hot washing processing procedure can be properly adjusted according to the characteristic of the oily sludge and the demulsifier that adds, and this application does not do the concrete requirement to the temperature of hot washing processing procedure, and this temperature can be rationally adjusted according to on-the-spot actual conditions to the technical staff in the field, as long as the assurance can be realized the utility model aims at.
Specifically, the process further comprises condensing the oil gas to obtain a light component oil product and a condensed non-condensable gas;
further, the process also comprises the step of carrying out incineration treatment on the dried oil sludge and/or light-component oil products and condensed non-condensable gas to obtain dry slag.
Further, the process also comprises the step of providing energy for the drying fractionation treatment process by using heat generated by incineration treatment of the dried sludge.
In the process, part of light component oil gas is condensed to obtain liquid oil, the liquid oil can be recovered, and gases which cannot be condensed at normal temperature, such as methane, ethane and the like, are non-condensable gases.
In the above process, the drying and fractionation treatment can be performed in a drying and fractionation all-in-one machine, and the drying and fractionation all-in-one machine can adjust process parameters such as temperature, residence time and rotating speed in the drying and fractionation treatment process according to oil sludge characteristic parameter differences such as water content and oil content of the oil-containing sludge.
In the process, the drying and fractionation treatment temperature is 150-300 ℃, the retention time is 4-8h, and the rotation speed is 0-15 r/min.
In the above process, the oil content of the dried sludge (based on the total weight of the dried sludge) is less than 5 wt%.
In the above process, the temperature of the incineration treatment is 850-. Wherein the oxygen concentration is calculated by taking the total volume of primary air and secondary air introduced into the incinerator in the incineration treatment process as a reference.
In the above process, lime powder can be added into the system during incineration to reduce the sulfur oxide content in the flue gas.
In the process described above, the dry slag has an average moisture content (calculated on the total weight of the dry slag) of less than or equal to 25 wt% and an oil content (calculated on the total weight of the dry slag) of less than 0.3 wt%. After the oily sludge is treated by the conventional hot washing technology and the conventional hot phase separation technology in the field, the oil content of the obtained dry residue is even difficult to reach less than 2 percent.
It is thus clear that, adopt the utility model provides a process handles the oiliness rate of the dry sediment that obtains to oiliness mud and is less than 0.3 wt%, follow-up no longer need carry out secondary treatment to this dry sediment, it can regard as general solid useless after the appraisal to store in the soil of reducing and keep in the room, perhaps as the regional well passageway of laying of oil field, bedding well site base material, can realize dangerous waste material innocent treatment, go to rationally, promptly the utility model provides a process is oiliness mud final polarization treatment process, and the oiliness rate in the dry sediment that obtains after adopting the present multiple oiliness mud processing method of this area to handle oiliness mud respectively is still higher, needs carry out secondary treatment to the dry sediment in order further to degrease.
Wherein, the oil content and the water content of the oil-containing sludge, the dried sludge and the dry slag can be measured by adopting a conventional method in the field; as in the embodiment of the present invention, the oil content and water content data can be measured according to the contents specified in GB/T212-2008, CJ/T221-2005.
In the process, incineration treatment can be carried out in an incinerator, the self heat value of the dried oil sludge (one of the necessary conditions that the oil sludge can realize self-sustaining combustion is the heat value larger than 900Kcal/kg) is fully utilized in the incineration process, so that the dried oil sludge is fully combusted and thoroughly decomposed, the heat ignition loss of incineration residues is less than 5%, the oil content of the treated dry residues is less than 0.3 wt%, the treated dry residues are discharged to a specified area along with a slag salvaging machine, are wet slag residues, can effectively avoid generating raise dust, and can be directly used for building materials or paving;
in addition, the oxygen concentration in the incinerator cannot be too high, preferably 6-11 v%, otherwise, the amount of the normal-temperature air entering the hearth of the incinerator is too large, and the temperature in the hearth can be affected.
Specifically, the process also comprises the step of treating high-temperature flue gas in the incineration treatment process of the dried oil sludge, and the process comprises the following steps:
1) carrying out high-temperature dust removal on the high-temperature flue gas;
2) then the flue gas after high-temperature dust removal is subjected to heat exchange and rapid quenching;
3) then, the flue gas treated in the step 2) is subjected to heat exchange and temperature reduction, and then is dedusted;
4) and then the flue gas treated in the step 3) is subjected to desulfurization and dust removal and is discharged after reaching the standard.
In the process, the temperature of high-temperature dust removal in the high-temperature flue gas treatment is 850-1100 ℃, and the retention time is more than 2 s.
The high-temperature dust removal can be carried out in a secondary combustion chamber of the incinerator, the residence time of the smoke in the secondary combustion chamber at 850-1100 ℃ is ensured to be more than 2s in the high-temperature dust removal process, the smoke reaches 3T + E required by combustion through disturbance of secondary air and non-condensable gas, namely, the incineration temperature in a hearth of the incinerator is 850-1100 ℃, the residence time is more than 2s, the incinerator can meet the requirement of combustion on the turbulence degree by being a bubbling fluidized bed incinerator, and the bubbling fluidized bed incinerator is provided with a secondary air device which can ensure larger air quantity in the combustion process.
In the above-described process, the rapid quenching in the high-temperature flue gas treatment is to reduce the flue gas temperature to below 200 ℃ within 1 s.
Wherein, the rapid quenching can be carried out in a quenching chamber, the rapid quenching is to reduce the temperature of the flue gas to below 200 ℃ within 1s, reduce the detention time of the flue gas in a temperature zone of 200-500 ℃, and utilize heat energy to avoid the temperature zone of 200-500 ℃; this operation can reduce the polymerization of dioxin to reduce the emission amount of dioxin in the exhaust gas as much as possible.
In the above process, the heat transfer cooling among the high temperature flue gas treatment can be gone on in air heater, and the utility model discloses do not do the concrete requirement to the flue gas temperature after the air heater heat transfer cooling, this temperature of field technical personnel reasonable control according to on-the-spot actual work needs.
In the technology in the aforesaid, the dust removal in the high temperature flue gas processing can go on in the sack cleaner, and the desulfurization is removed dust and can be gone on in the comprehensive tower of desulfurization, and the flue gas after reaching standard discharges through the chimney, the utility model discloses the exhaust gas pollutant that the processing technology of oiliness mud produced need satisfy after the regulation in GB 18484 + 2014 after handling discharges, if contain the foul smell among the exhaust gas pollutant, then need satisfy after handling and discharge after the regulation in GB 14554 + 1993.
In the process, the flue gas subjected to high-temperature dust removal can exchange heat with heat conduction oil in a heat medium heat exchanger; the heat conduction oil in the heat medium heat exchanger after heat exchange with the flue gas subjected to high-temperature dust removal can provide heat for the drying and fractionating integrated machine so as to ensure that the heat energy is fully utilized;
the heat required by the hot washing treatment can be provided by the waste heat of the surplus washing wastewater in the drying and fractionation treatment process, and the insufficient part can be supplemented by the low-level waste heat of the heat-conducting oil heat exchanger or a waste heat boiler; therefore, the utility model provides a suitable calorific value of technology can be according to the suitable calorific value of hot back fatlute oiliness rate, moisture content analog computation, satisfies each technology section of system and needs hot requirement, and the maximize utilizes fatlute self heat energy.
The utility model provides a system and technology are applicable to the processing that falls to the ground mud, tank bottoms mud, three mud of refining, drilling detritus, drilling mud etc. contain oily mud, do not receive the restriction of its moisture content, oil content to oily mud's processing, and the modularization technology combination, the adaptation face is wide.
The system and the process provided by the utility model combine the hot washing, drying fractionation and burning technologies, so that the oil can be recovered in the hot washing section and the drying fractionation section, and the oil can be recovered to the maximum extent; and the utility model provides a technical scheme can also exert hot washing, mummification fractionation, burns the respective technical advantage of technique, but the maximize utilizes fatlute self heat energy, can realize oily sludge innoxious, ultimate processing, and the treatment effeciency is high, and is with low costs.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a system for treating oily sludge provided in embodiment 1 of the present invention.
Fig. 2 is a flow chart of a treatment process of oily sludge provided in embodiment 3 of the present invention.
FIG. 3 is a flow chart of the treatment process of oily sludge provided in embodiments 4-6 of the present invention.
The main reference numbers illustrate:
1. a hot washing unit;
11. an oil sludge storage pool;
12. a primary hot washing tank;
13. finally, washing the pond with extreme heat;
14. a centrifugal separation device;
2. a drying fractionation unit;
21. a drying and fractionating integrated machine;
22. a washing cooler;
23. an oil storage tank;
24. washing the heat exchanger;
3. a deep oxidation unit;
31. an incinerator;
4. a tail gas treatment unit;
41. a heat medium heat exchanger;
42. a quenching chamber;
43. an air preheater;
44. a bag-type dust collector;
45. a desulfurization integrated tower;
46. high-temperature dust removal equipment.
Detailed Description
The following detailed description of the embodiments and the advantageous effects thereof will be provided by way of specific examples and accompanying drawings, which are provided to assist the reader in better understanding the nature and features of the present invention, and are not intended to limit the scope of the present invention.
Example 1
The present embodiment provides a processing system for oily sludge, the structural schematic diagram of which is shown in fig. 1, and as can be seen from fig. 1, the system comprises:
the system comprises a hot washing unit 1, a drying and fractionating unit 2, a deep oxidation unit 3 and a tail gas treatment unit 4;
the hot washing unit 1 comprises an oil sludge storage tank 11, a primary hot washing tank 12, a final hot washing tank 13 and centrifugal separation equipment 14; an outlet of the oil sludge storage pool 11 is connected with an inlet of the centrifugal separation device 14 through a primary hot washing pool 12 and a final hot washing pool 13 in sequence through pipelines, and a water outlet of the centrifugal separation device 14 is connected with the oil sludge storage pool 11 through a pipeline; the hot oil sludge washing outlet of the centrifugal separation equipment 14 is connected with the inlet of the drying and fractionating integrated machine 21 through a pipeline; the hot washing oil outlet of the final-electrode hot washing tank 13 is connected 23 with the oil storage tank through a pipeline;
the drying and fractionating unit 2 comprises a drying and fractionating integrated machine 21, a washing cooler 22, an oil storage tank 23 and a washing heat exchanger 24;
the deep oxidation unit 3 comprises an incinerator 31, wherein a dried oil sludge outlet of the drying and fractionating integrated machine 21 is connected with an inlet of the incinerator 31 through a pipeline, an oil gas outlet of the drying and fractionating integrated machine is connected with an inlet of the washing cooler 22 through a pipeline, and an outlet of the washing cooler 22 is connected with an inlet of the oil storage tank 23 through a pipeline; the outlet of the washing hot water of the washing cooler 22 is further connected with the inlets of the primary hot washing tank 12 and the washing heat exchanger 24 through pipelines, and the washing heat exchanger 24 is further connected with the oil sludge storage tank 11, the primary hot washing tank 12 and the final hot washing tank 13 respectively, so as to exchange heat with the oil sludge storage tank 11, the primary hot washing tank 12 and the final hot washing tank 13 respectively;
an outlet of the oil storage tank 23 and a non-condensable gas outlet of the scrubber cooler 22 are connected to an inlet of the incinerator 31 through pipes, respectively;
the tail gas treatment unit 4 comprises a high-temperature dust removal device 46, a heat medium heat exchanger 41, a quenching chamber 42, an air preheater 43, a bag-type dust remover 44 and a desulfurization comprehensive tower 45;
the flue gas outlet of the incinerator 31 is connected with the inlet of the integrated desulfurization tower 45 through a high-temperature dust removal device 46, a heat medium heat exchanger 41, a quenching chamber 42, an air preheater 43 and a bag-type dust remover 44 in sequence through pipelines;
and the heat medium heat exchanger 41 is also connected with the drying and fractionating integrated machine 21 and is used for exchanging heat with the raw materials in the drying and fractionating integrated machine 21.
In this embodiment, the system further includes a dust collecting device for collecting dust generated in the system (such as dust in flue gas of an incinerator).
In this embodiment, the heat exchanged air outlet of the air preheater 43 is connected to the inlet of the incinerator 31 through a pipeline to provide the air required for drying sludge incineration for the incinerator 31.
In this embodiment, the incinerator 31 is a bubbling fluidized bed incinerator.
Example 2
The embodiment provides a processing system of oily sludge, wherein, the system includes: a drying fractionation unit, a deep oxidation unit and a tail gas treatment unit;
the drying and fractionating unit comprises a drying and fractionating integrated machine, a washing cooler, an oil storage tank and a washing heat exchanger;
the deep oxidation unit comprises an incinerator, wherein a dried oil sludge outlet of the drying and fractionating integrated machine is connected with an inlet of the incinerator through a pipeline, an oil gas outlet of the drying and fractionating integrated machine is connected with an inlet of the washing cooler through a pipeline, and an outlet of the washing cooler is connected with an inlet of the oil storage tank through a pipeline; a washing hot water outlet of the washing cooler is connected with the washing heat exchanger through a pipeline so as to exchange heat for washing hot water discharged by the washing cooler;
the outlet of the oil storage tank and the non-condensable gas outlet of the washing cooler are respectively connected with the inlet of the incinerator through pipelines;
the tail gas treatment unit comprises high-temperature dust removal equipment, a heat medium heat exchanger, a quenching chamber, an air preheater, a bag-type dust remover and a desulfurization comprehensive tower;
the flue gas outlet of the incinerator is connected with the inlet of the integrated desulfurization tower through a high-temperature dust removal device, a heat medium heat exchanger, a quenching chamber, an air preheater and a bag-type dust remover in sequence through pipelines;
and the heat medium heat exchanger is also connected with the drying and fractionating integrated machine and is used for exchanging heat with the raw materials in the drying and fractionating integrated machine.
In this embodiment, the system further includes a dust collecting device for collecting dust generated in the system (such as dust in flue gas of an incinerator).
In this embodiment, the air outlet of the air preheater after heat exchange is connected to the inlet of the incinerator through a pipeline to provide air required by drying sludge incineration for the incinerator.
In this example, the incinerator was a bubbling fluidized bed incinerator.
Example 3
The embodiment provides a treatment process of oily sludge, which is realized by using the treatment system of oily sludge provided in embodiment 2, the flow chart of the process is shown in fig. 2, and as can be seen from fig. 2, the process comprises the following specific steps:
the oily sludge in the embodiment is historical residual oil sludge, is directly treated in situ beside an oil sludge pit, and has lower oil content and lower water content, wherein the oil content is lower than 10 percent, and the water content is about 25 percent;
drying and fractionating the oily sludge in a drying and fractionating integrated machine to obtain oil gas and dried oil sludge, wherein the process parameters of the drying and fractionating stage are as follows: the temperature is 150 ℃, the time is 5h, and the rotating speed is 12 r/min; the oil content of the obtained dried oil sludge is less than 5 wt%;
condensing the oil gas to obtain light-component oil products and condensed non-condensable gas;
carrying out incineration treatment on the dried oil sludge and the condensed non-condensable gas in an incinerator to obtain dry slag, wherein the incineration treatment temperature is 1100 ℃, and the oxygen concentration is 6-11 v%; the average water content of the obtained dry slag is less than or equal to 25 wt%, and the oil content is less than 0.3 wt%;
the method for treating the high-temperature flue gas in the incineration treatment process of the dried oil sludge comprises the following steps:
1) carrying out high-temperature dust removal on the high-temperature flue gas in high-temperature dust removal equipment; the temperature of high-temperature dust removal is 1100 ℃, and the retention time is more than 2 s;
2) the flue gas after high-temperature dust removal exchanges heat with heat conduction oil in a heat medium heat exchanger, and the heat conduction oil which exchanges heat with the flue gas after high-temperature dust removal in the heat medium heat exchanger can provide heat for the drying and fractionating integrated machine so as to ensure that heat energy is fully utilized (namely, the heat generated by incineration treatment of dried oil sludge is used for providing energy for the drying and fractionating treatment process);
rapidly quenching the heat-exchanged flue gas in a quenching chamber; the rapid quenching is to reduce the temperature of the flue gas to below 200 ℃ within 1 s;
3) then, performing heat exchange and cooling on the flue gas treated in the step 2) in an air preheater, and then performing dust removal in a bag-type dust remover;
4) and then, the flue gas treated in the step 3) is subjected to desulfurization and dust removal in a desulfurization comprehensive tower and is discharged after reaching the standard (the tail gas after treatment meets the regulation in GB 18484-2014).
Example 4
The embodiment provides a treatment process of oily sludge, which is realized by using the treatment system of oily sludge provided in embodiment 1, the flow chart of the process is shown in fig. 3, and as can be seen from fig. 3, the process comprises the following specific steps:
the oil-containing sludge in the embodiment is tank bottom oil sludge which has high oil content and water content, wherein the oil content is 25% and the water content reaches 65%;
adding an AR type demulsifier into the pretreated oily sludge, and then performing hot washing treatment on the obtained mixture; the hot washing treatment process parameters are as follows: the hot washing temperature is 50 ℃, and the stirring time is 60 min;
drying and fractionating the oily sludge subjected to the hot washing treatment;
drying and fractionating the oily sludge in a drying and fractionating integrated machine to obtain oil gas and dried oil sludge, wherein the process parameters of the drying and fractionating stage are as follows: the temperature is 220 ℃, the time is 7h, and the rotating speed is 6 r/min; the oil content of the obtained dried oil sludge is less than 5 wt%;
condensing the oil gas to obtain light-component oil products and condensed non-condensable gas;
carrying out incineration treatment on the dried oil sludge and the condensed non-condensable gas in an incinerator to obtain dry slag, wherein the incineration treatment temperature is 1100 ℃, and the oxygen concentration is 6-11 v%; the average water content of the obtained dry slag is less than or equal to 25 wt%, and the oil content is less than 0.3 wt%;
the method for treating the high-temperature flue gas in the incineration treatment process of the dried oil sludge comprises the following steps:
1) carrying out high-temperature dust removal on the high-temperature flue gas in high-temperature dust removal equipment; the temperature of high-temperature dust removal is 1100 ℃, and the retention time is more than 2 s;
2) the flue gas after high-temperature dust removal exchanges heat with heat conduction oil in a heat medium heat exchanger, and the heat conduction oil which exchanges heat with the flue gas after high-temperature dust removal in the heat medium heat exchanger can provide heat for the drying and fractionating integrated machine so as to ensure that heat energy is fully utilized (namely, the heat generated by incineration treatment of dried oil sludge is used for providing energy for the drying and fractionating treatment process);
rapidly quenching the heat-exchanged flue gas in a quenching chamber; the rapid quenching is to reduce the temperature of the flue gas to below 200 ℃ within 1 s;
3) then, performing heat exchange and cooling on the flue gas treated in the step 2) in an air preheater, and then performing dust removal in a bag-type dust remover;
4) and then, the flue gas treated in the step 3) is subjected to desulfurization and dust removal in a desulfurization comprehensive tower and is discharged after reaching the standard (the tail gas after treatment meets the regulation in GB 18484-2014).
Example 5
The embodiment provides a treatment process of oily sludge, which is realized by using the treatment system of oily sludge provided in embodiment 1, the flow chart of the process is shown in fig. 3, and as can be seen from fig. 3, the process comprises the following specific steps:
in the embodiment, the oil-containing sludge is ground oil sludge, the oil content is higher, the water content is lower, the oil content is 20%, and the water content is 30%;
adding alkaline inorganic salt (Na mixed according to a certain mass ratio) into the pretreated oily sludge2SiO3And Na2CO3) Then, carrying out hot washing treatment on the obtained mixture; the hot washing treatment process parameters are as follows: the hot washing temperature is 70 ℃, and the stirring time is 30 min;
drying and fractionating the oily sludge subjected to the hot washing treatment;
drying and fractionating the oily sludge in a drying and fractionating integrated machine to obtain oil gas and dried oil sludge, wherein the process parameters of the drying and fractionating stage are as follows: the temperature is 180 ℃, the time is 6h, and the rotating speed is 8 r/min; the oil content of the obtained dried oil sludge is less than 5 wt%;
condensing the oil gas to obtain light-component oil products and condensed non-condensable gas;
carrying out incineration treatment on the dried oil sludge and the condensed non-condensable gas in an incinerator to obtain dry slag, wherein the incineration treatment temperature is 1100 ℃, and the oxygen concentration is 6-11 v%; the average water content of the obtained dry slag is less than or equal to 25 wt%, and the oil content is less than 0.3 wt%;
the method for treating the high-temperature flue gas in the incineration treatment process of the dried oil sludge comprises the following steps:
1) carrying out high-temperature dust removal on the high-temperature flue gas in high-temperature dust removal equipment; the temperature of high-temperature dust removal is 1100 ℃, and the retention time is more than 2 s;
2) the flue gas after high-temperature dust removal exchanges heat with heat conduction oil in a heat medium heat exchanger, and the heat conduction oil which exchanges heat with the flue gas after high-temperature dust removal in the heat medium heat exchanger can provide heat for the drying and fractionating integrated machine so as to ensure that heat energy is fully utilized (namely, the heat generated by incineration treatment of dried oil sludge is used for providing energy for the drying and fractionating treatment process);
rapidly quenching the heat-exchanged flue gas in a quenching chamber; the rapid quenching is to reduce the temperature of the flue gas to below 200 ℃ within 1 s;
3) then, performing heat exchange and cooling on the flue gas treated in the step 2) in an air preheater, and then performing dust removal in a bag-type dust remover;
4) and then, the flue gas treated in the step 3) is subjected to desulfurization and dust removal in a desulfurization comprehensive tower and is discharged after reaching the standard (the tail gas after treatment meets the regulation in GB 18484-2014).
Example 6
The embodiment provides a treatment process of oily sludge, which is realized by using the treatment system of oily sludge provided in embodiment 1, the flow chart of the process is shown in fig. 3, and as can be seen from fig. 3, the process comprises the following specific steps:
the oil-containing sludge in the embodiment is drilling mud, and has high oil content and high water content, wherein the oil content is 15% and the water content is 60%;
adding an SP type demulsifier into the pretreated oily sludge, and then performing hot washing treatment on the obtained mixture; the hot washing treatment process parameters are as follows: the hot washing temperature is 60 ℃, and the stirring time is 120 min;
drying and fractionating the oily sludge subjected to the hot washing treatment;
drying and fractionating the oily sludge in a drying and fractionating integrated machine to obtain oil gas and dried oil sludge, wherein the process parameters of the drying and fractionating stage are as follows: the temperature is 200 ℃, the time is 6h, and the rotating speed is 10 r/min; the oil content of the obtained dried oil sludge is less than 5 wt%;
condensing the oil gas to obtain light-component oil products and condensed non-condensable gas;
carrying out incineration treatment on the dried oil sludge and the condensed non-condensable gas in an incinerator to obtain dry slag, wherein the incineration treatment temperature is 1100 ℃, and the oxygen concentration is 6-11 v%; the average water content of the obtained dry slag is less than or equal to 25 wt%, and the oil content is less than 0.3 wt%;
the method for treating the high-temperature flue gas in the incineration treatment process of the dried oil sludge comprises the following steps:
1) carrying out high-temperature dust removal on the high-temperature flue gas in high-temperature dust removal equipment; the temperature of high-temperature dust removal is 1100 ℃, and the retention time is more than 2 s;
2) the flue gas after high-temperature dust removal exchanges heat with heat conduction oil in a heat medium heat exchanger, and the heat conduction oil which exchanges heat with the flue gas after high-temperature dust removal in the heat medium heat exchanger can provide heat for the drying and fractionating integrated machine so as to ensure that heat energy is fully utilized (namely, the heat generated by incineration treatment of dried oil sludge is used for providing energy for the drying and fractionating treatment process);
rapidly quenching the heat-exchanged flue gas in a quenching chamber; the rapid quenching is to reduce the temperature of the flue gas to below 200 ℃ within 1 s;
3) then, performing heat exchange and cooling on the flue gas treated in the step 2) in an air preheater, and then performing dust removal in a bag-type dust remover;
4) and then, the flue gas treated in the step 3) is subjected to desulfurization and dust removal in a desulfurization comprehensive tower and is discharged after reaching the standard (the tail gas after treatment meets the regulation in GB 18484-2014).
To sum up, the embodiment of the utility model provides a system and technology are applicable to the processing that falls to the ground mud, tank bottoms mud, three mud of refining, drilling detritus, drilling mud etc. contain oil mud, do not receive the restriction of its moisture content, oil content to the processing of containing oil mud, and the modularization technology combination, the adaptation face is wide.
The system and the process provided by the embodiment of the utility model combine the hot washing, drying fractionation and burning technologies, so that the oil can be recovered in the hot washing section and the drying fractionation section, and the oil can be recovered to the maximum extent; and the embodiment of the utility model provides a technical scheme can also exert hot washing, mummification fractionation, burns the respective technical advantage of technique, can maximize utilization fatlute self heat energy, can realize oiliness mud innoxious, ultimate processing, and the treatment effeciency is high, and is with low costs, particularly, the direct cost of processing of oiliness mud mainly comprises fuel cost, charges of electricity, water cost, medicament cost, labour cost etc. the embodiment of the utility model provides a lower main body of the cost of the processing technology of oiliness mud and system is now: the utility model discloses technical scheme utilizes waste oil mud self calorific value and cyclic utilization system heat energy through retrieval and utilization heat energy, reducible expensive finished product fuel, like the use amount of gas, finished product oil etc. reduce the fuel cost, and then reduce the operation cost.
The above description is only for the specific embodiments of the present invention, and the scope of the present invention can not be limited by the embodiments, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent.
Claims (10)
1. A system for treating oily sludge, comprising: the deep oxidation unit comprises an incinerator, and the drying fractionation unit comprises a drying fractionation all-in-one machine, a washing cooler, a washing heat exchanger and an oil storage tank;
the drying and fractionating integrated machine is characterized in that a dried oil sludge outlet of the drying and fractionating integrated machine is connected with an inlet of the incinerator through a pipeline, an oil gas outlet of the drying and fractionating integrated machine is connected with an inlet of the washing cooler through a pipeline, and an outlet of the washing cooler is connected with an inlet of the oil storage tank through a pipeline; and a washing hot water outlet of the washing cooler is connected with the washing heat exchanger through a pipeline so as to exchange heat for the washing hot water discharged by the washing cooler.
2. The system of claim 1, wherein an outlet of the oil storage tank and a non-condensable gas outlet of the scrubber cooler are connected to an inlet of the incinerator through pipes, respectively.
3. The system of claim 1, further comprising a tail gas treatment unit, wherein the tail gas treatment unit comprises a high-temperature dust removal device, a heat medium heat exchanger, a quenching chamber, an air preheater, a bag-type dust remover and a desulfurization comprehensive tower;
and a flue gas outlet of the incinerator is connected with an inlet of the integrated desulfurization tower through a high-temperature dust removal device, a heat medium heat exchanger, a quenching chamber, an air preheater and a bag-type dust remover in sequence through pipelines.
4. The system as claimed in claim 3, wherein the heat medium heat exchanger is further connected with the drying and fractionating all-in-one machine for exchanging heat with the raw material in the drying and fractionating all-in-one machine.
5. A system according to claim 3, wherein the heat exchanged air outlet of the air preheater is connected to the inlet of the incinerator via a conduit for supplying air to the incinerator for dry sludge incineration.
6. The system of claim 4, wherein the heat exchanged air outlet of the air preheater is connected to the inlet of the incinerator via a conduit for supplying air to the incinerator for dry sludge incineration.
7. The system of claim 1, further comprising a hot wash unit comprising a sludge storage tank, a primary hot wash tank, a final hot wash tank, and a centrifugal separation device; an outlet of the oil sludge storage pool is connected with an inlet of the centrifugal separation equipment through a primary hot washing pool and a final hot washing pool in sequence through pipelines, and a water outlet of the centrifugal separation equipment is connected with the oil sludge storage pool through a pipeline; the hot oil sludge washing outlet of the centrifugal separation equipment is connected with the inlet of the drying and fractionating integrated machine through a pipeline; the hot washing oil outlet of the final-electrode hot washing tank is connected with the oil storage tank through a pipeline;
and a washing hot water outlet of the washing cooler is also connected with an inlet of the primary hot washing pool through a pipeline, and the washing heat exchanger is also respectively connected with the oil sludge storage pool, the primary hot washing pool and the final hot washing pool and used for respectively exchanging heat with the oil sludge storage pool, the primary hot washing pool and the final hot washing pool.
8. The system of claim 1, further comprising a dust collection device for collecting dust generated in the system.
9. The system of claim 1, further comprising a tail gas treatment unit, wherein the tail gas treatment unit comprises a high-temperature dust removal device, a heat medium heat exchanger, a quenching chamber, an air preheater, a bag-type dust remover and a desulfurization comprehensive tower;
the flue gas outlet of the incinerator is connected with the inlet of the integrated desulfurization tower through a high-temperature dust removal device, a heat medium heat exchanger, a quenching chamber, an air preheater and a bag-type dust remover in sequence through pipelines;
the system also comprises a hot washing unit, wherein the hot washing unit comprises an oil sludge storage pool, a primary hot washing pool, a final hot washing pool and centrifugal separation equipment; an outlet of the oil sludge storage pool is connected with an inlet of the centrifugal separation equipment through a primary hot washing pool and a final hot washing pool in sequence through pipelines, and a water outlet of the centrifugal separation equipment is connected with the oil sludge storage pool through a pipeline; the hot oil sludge washing outlet of the centrifugal separation equipment is connected with the inlet of the drying and fractionating integrated machine through a pipeline; the hot washing oil outlet of the final-electrode hot washing tank is connected with the oil storage tank through a pipeline;
and a washing hot water outlet of the washing cooler is also connected with an inlet of the primary hot washing pool through a pipeline, and the washing heat exchanger is also respectively connected with the oil sludge storage pool, the primary hot washing pool and the final hot washing pool and used for respectively exchanging heat with the oil sludge storage pool, the primary hot washing pool and the final hot washing pool.
10. The system of claim 1, further comprising a tail gas treatment unit, wherein the tail gas treatment unit comprises a high-temperature dust removal device, a heat medium heat exchanger, a quenching chamber, an air preheater, a bag-type dust remover and a desulfurization comprehensive tower;
the flue gas outlet of the incinerator is connected with the inlet of the integrated desulfurization tower through a high-temperature dust removal device, a heat medium heat exchanger, a quenching chamber, an air preheater and a bag-type dust remover in sequence through pipelines;
the system also comprises a hot washing unit, wherein the hot washing unit comprises an oil sludge storage pool, a primary hot washing pool, a final hot washing pool and centrifugal separation equipment; an outlet of the oil sludge storage pool is connected with an inlet of the centrifugal separation equipment through a primary hot washing pool and a final hot washing pool in sequence through pipelines, and a water outlet of the centrifugal separation equipment is connected with the oil sludge storage pool through a pipeline; the hot oil sludge washing outlet of the centrifugal separation equipment is connected with the inlet of the drying and fractionating integrated machine through a pipeline; the hot washing oil outlet of the final-electrode hot washing tank is connected with the oil storage tank through a pipeline;
the washing heat exchanger is also respectively connected with the oil sludge storage pool, the primary hot washing pool and the final hot washing pool for respectively exchanging heat with the oil sludge storage pool, the primary hot washing pool and the final hot washing pool;
the system also includes a dust collection device for collecting dust generated in the system.
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| CN202020635966.3U CN212127929U (en) | 2020-04-24 | 2020-04-24 | Processing system of oily sludge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111410390A (en) * | 2020-04-24 | 2020-07-14 | 广州市环润环保科技有限公司 | Treatment process and system for oily sludge |
| CN113587114A (en) * | 2021-07-30 | 2021-11-02 | 北京工商大学 | High-water-content oil sludge clean combustion treatment device |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111410390A (en) * | 2020-04-24 | 2020-07-14 | 广州市环润环保科技有限公司 | Treatment process and system for oily sludge |
| CN113587114A (en) * | 2021-07-30 | 2021-11-02 | 北京工商大学 | High-water-content oil sludge clean combustion treatment device |
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Granted publication date: 20201211 |