CN111153576A - Rotary oily sludge treatment system and method - Google Patents
Rotary oily sludge treatment system and method Download PDFInfo
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- CN111153576A CN111153576A CN202010051988.XA CN202010051988A CN111153576A CN 111153576 A CN111153576 A CN 111153576A CN 202010051988 A CN202010051988 A CN 202010051988A CN 111153576 A CN111153576 A CN 111153576A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1003—Waste materials
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
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Abstract
The invention discloses a rotary oily sludge treatment system and a rotary oily sludge treatment method. The rotary oily sludge treatment system comprises a feeding screw conveyor, a rotary pyrolysis furnace and a discharging screw conveyor. The rotary pyrolysis furnace sequentially comprises a feeding section, a first transmission section, a pyrolysis section, a second transmission section and a discharging section along the length direction; a feeding air lock is arranged between the feeding section and the discharging end of the feeding screw conveyor; the first transmission section comprises a first fish scale sealing structure and a first transmission gear set, the feeding section is connected with the first transmission section through the first fish scale sealing structure, and the first transmission gear set is connected with a driving motor; the pyrolysis section comprises a heating chamber and a pyrolysis cavity, and the heating chamber is arranged outside the pyrolysis cavity and is spaced from the pyrolysis cavity; the second transmission section comprises a second fish scale sealing structure and a second transmission gear set; the discharging section is connected with the second transmission section through a second fish scale sealing structure; and a discharge airlock is arranged between the feed end of the discharge screw conveyor and the pyrolysis solid product outlet.
Description
Technical Field
The invention relates to the technical field of hazardous waste treatment, in particular to a rotary oily sludge treatment system and a rotary oily sludge treatment method.
Background
The oily sludge refers to sludge mixed with heavy oil such as crude oil, oil residue, various finished oils, etc. The natural world does not inherently have oily sludge, and the crude oil and the finished oil leak out due to various accident operations and equipment problems caused by various fish finished oil, crude oil related industries, civil and residential groups, individuals and the like in oil field exploitation, petroleum smelting, use, storage, transportation and the like and are mixed with water, soil and the like to form a mixture containing oil, water, soil and even other pollutants.
The oily sludge contains substances such as petroleum and heavy metals, and if the oily sludge is not treated and discharged, the oily sludge may have certain influence on the environment, and if the oily sludge is stored in the open air, hydrocarbon substances such as petroleum volatilize, and the quality of the atmospheric environment is influenced; if the surface water is close to, the surface water quality can be influenced by surface runoff. However, the existing means for treating oily sludge still need to be improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, it is an object of the present invention to propose a rotary oily sludge treatment system and method. The rotary oily sludge treatment system can reduce, recycle and harmlessly treat oily sludge, solves the problem of environmental pollution caused by the oily sludge, improves the technical level of oily sludge treatment, and has remarkable environmental and economic benefits.
In one aspect of the invention, a rotary oily sludge treatment system is presented. According to an embodiment of the present invention, the rotary oily sludge treatment system comprises:
a feed screw conveyor;
the rotary pyrolysis furnace sequentially comprises a feeding section, a first transmission section, a pyrolysis section, a second transmission section and a discharging section along the length direction, wherein,
the feeding section is connected with the discharging end of the feeding spiral conveyor, and a feeding air lock is arranged between the feeding section and the discharging end of the feeding spiral conveyor;
the first transmission section comprises a first fish scale sealing structure and a first transmission gear set, the feeding section is connected with the first transmission section through the first fish scale sealing structure, and the first transmission gear set is connected with a driving motor;
the pyrolysis section comprises a heating chamber and a pyrolysis cavity, the heating chamber is arranged outside the pyrolysis cavity and is spaced from the pyrolysis cavity, and the heating chamber is provided with a high-temperature medium inlet and a tail gas outlet; the pyrolysis cavity is communicated with the feeding section through the first transmission section;
the second transmission section comprises a second fish scale sealing structure and a second transmission gear set, and the pyrolysis cavity is connected with the second transmission section;
the discharging section is connected with the second transmission section through the second fish scale sealing structure and communicated to the pyrolysis cavity, and the discharging section is provided with a pyrolysis gas product outlet and a pyrolysis solid product outlet;
and the feeding end of the discharging screw conveyor is connected with the pyrolysis solid product outlet, and a discharging air lock is arranged between the feeding end of the discharging screw conveyor and the pyrolysis solid product outlet.
According to the rotary oily sludge treatment system provided by the embodiment of the invention, the feeding screw conveyor can push oily sludge into the rotary pyrolysis furnace, the oily sludge runs to the pyrolysis section of the rotary pyrolysis furnace, the heating chamber is built outside the pyrolysis section, the oily sludge is subjected to pyrolysis reaction under indirect heating of a high-temperature medium in the heating chamber to generate gas products mainly comprising pyrolysis oil gas and solid slag, and the purpose of reduction is achieved. The gas product obtained by pyrolysis can be used as fuel after purification, and the solid slag can be used for paving oil field roads, paving well sites, sealing and covering soil of solid waste fields, filling waste oil sand mine pits and the like. In this rotation type oily sludge treatment system, be equipped with the feeding airlock between feeding screw conveyer and the rotatory pyrolysis oven, be equipped with the ejection of compact airlock between rotatory pyrolysis oven and the ejection of compact screw conveyer to make oily sludge anaerobic pyrolysis in rotatory pyrolysis oven. The pyrolysis section of the rotary pyrolysis furnace is respectively connected with the feeding section and the discharging section through the first transmission section and the second transmission section, and the pyrolysis section is rotated and the feeding section and the discharging section are fixed under the driving of the driving motor by adopting a fish scale sealing structure. The rotary oily sludge treatment system can reduce, recycle and harmlessly treat oily sludge, solves the problem of environmental pollution caused by the oily sludge, improves the technical level of oily sludge treatment, and has remarkable environmental and economic benefits.
In addition, the rotary oily sludge treatment system according to the above embodiment of the invention may also have the following additional technical features:
in some embodiments of the invention, the pitch of the feed screw conveyor is 200 to 500 mm.
In some embodiments of the invention, the discharge screw conveyor is a water-cooled screw conveyor having a cold water inlet, a cold water outlet, and a discharge outlet.
In some embodiments of the present invention, the outer walls of the rotary pyrolysis furnace at the feeding section, the first transmission section, the second transmission section and the discharging section are provided with insulating layers.
In some embodiments of the present invention, a plurality of fixed shoveling plates and a plurality of stirring chains are distributed in the pyrolysis cavity.
In some embodiments of the invention, the rotary oily sludge treatment system further comprises: the hot blast stove is provided with a fuel inlet and a high-temperature medium outlet, and the high-temperature medium outlet is connected with the high-temperature medium inlet of the heating chamber.
In some embodiments of the invention, the rotary oily sludge treatment system further comprises: the condensation purification device is provided with a pyrolysis gas product inlet, a non-condensable gas outlet and a pyrolysis oil outlet, and the non-condensable gas outlet and the pyrolysis oil outlet are connected with a fuel inlet of the hot blast stove.
In some embodiments of the invention, the rotary oily sludge treatment system further comprises: the oxygen content detection device is arranged at the pyrolysis gas product outlet, and a nitrogen inlet is also arranged at the pyrolysis gas product outlet.
In another aspect of the invention, the invention provides an oily sludge treatment method implemented by adopting the rotary oily sludge treatment system of the embodiment. According to an embodiment of the present invention, the method for treating oily sludge includes: feeding the oily sludge into a rotary pyrolysis furnace by using a feeding screw conveyor for pyrolysis treatment to obtain pyrolysis gas products and pyrolysis solid products; a high temperature medium is supplied to the heating chamber for providing heat for the pyrolysis process.
In addition, the method for treating the oily sludge according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the invention, the liquid content of the oily sludge is 20-40 wt%.
In some embodiments of the invention, the average particle size of the oily sludge is no greater than 30 mm.
In some embodiments of the invention, the filling rate of the rotary pyrolysis furnace barrel is 15-20%.
In some embodiments of the present invention, the temperature of the high temperature medium is 750-850 ℃.
In some embodiments of the present invention, the pyrolysis treatment is performed at 450 to 600 ℃ for 40 to 75 min.
In some embodiments of the invention, the method for treating oily sludge further comprises: fuel is fed to the stove for combustion in order to obtain said high temperature medium.
In some embodiments of the invention, the method for treating oily sludge further comprises: and feeding the pyrolysis gas product to a condensation purification device for condensation purification to obtain non-condensable gas and pyrolysis oil, and feeding the non-condensable gas and the pyrolysis oil serving as the fuel to the hot blast stove for combustion.
In some embodiments of the invention, the method for treating oily sludge further comprises: the nitrogen gas inlet is controlled to be opened or closed based on the detection result of the oxygen content detection means so as to control the oxygen content in the rotary pyrolysis furnace.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a rotary oily sludge treatment system provided by an embodiment of the invention.
FIG. 2 is a side sectional view of a rotary oily sludge treatment system provided in an embodiment of the present invention.
FIG. 3 is a side internal view of a rotary oily sludge treatment system provided in an embodiment of the present invention.
Reference numerals:
100: a feed screw conveyor; 110: a feed inlet;
200: a rotary pyrolysis furnace; 210: feeding airlock; 220: a heat-insulating layer;
221: a first fish scale sealing structure; 222: a bull gear; 223: a pinion gear; 224: a drive motor;
231: a heating chamber; 232: a pyrolysis cavity; 233: a high temperature medium inlet; 234: a tail gas outlet; 235: refractory brick walls; 236: fixing the shoveling plate; 237: a stirring chain;
241: a second fish scale sealing structure; 242: a belt wheel; 243: a tug;
251: a pyrolysis gas product outlet; 252: a pyrolysis solid product outlet;
300: a discharge screw conveyor; 310: discharging airlock;
400: a hot blast stove.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In one aspect of the invention, a rotary oily sludge treatment system is presented. According to an embodiment of the present invention, referring to fig. 1, the rotary type oily sludge treatment system includes: a feed screw conveyor 100, a rotary pyrolysis furnace 200, and an exit screw conveyor 300. The rotary type oily sludge treatment system according to an embodiment of the present invention will be described in detail with further reference to fig. 1 to 3.
According to an embodiment of the present invention, the feeding screw conveyor 100 has a feeding port 110 and is connected to the rotary pyrolysis furnace 200 through a feeding pipe, the feeding pipe is provided with a feeding airlock 210, and sludge to be treated is pushed to the rotary pyrolysis furnace 200 through the feeding screw conveyor 100. In the pushing process, the feeding screw conveyor 100 can uniformly stir the oily sludge to be treated, so as to avoid coking in the subsequent pyrolysis process. In addition, it should be noted that the feeding screw conveyor 100 may adopt equipment well known in the art, which includes a motor, a screw blade, a housing, and the like.
According to the embodiment of the invention, the screw pitch of the feeding screw conveyor 100 is 200-500 mm, the processing capacity can be 0.5-5 t/h, and the screw pitch is matched with the processing capacity of the rotary pyrolysis furnace 200.
According to the embodiment of the invention, the liquid content (the sum of the water content and the oil content) of the oily sludge feed is 20-40%, and the average particle size of the oily sludge feed is not more than 30 mm. If the liquid content of the oily sludge is too high, the sludge may be difficult to feed, the treatment efficiency may be reduced, and the thermal efficiency of the whole equipment may be adversely affected. According to some embodiments of the present invention, for oily sludge with too high liquid content, it can be dehydrated and deoiled in advance before feeding. The situation that the average grain size of the oily sludge is too high can cause the blockage of feeding airlock, incomplete drying, incomplete pyrolysis reaction and the like, and the oily sludge with too high grain size needs to be pre-sorted and crushed.
According to embodiments of the present invention, the feed airlock 210 is a well-established device in the art that may function to seal the interior of the rotary pyrolysis furnace from the outside air. The feeding airlock is a star-shaped feeding valve, the bottom of the valve is provided with a blockage-preventing rotary valve, a control motor and other components for slag removal, and the control motor can be interlocked with the level indicator for automatic control or manual control.
According to the embodiment of the present invention, the rotary pyrolysis furnace 200 sequentially comprises a feeding section, a first transmission section, a pyrolysis section, a second transmission section and a discharging section along the length direction, wherein the feeding section is connected with the discharging end of the feeding screw conveyor 100, and the feeding airlock 210 is arranged between the feeding section and the discharging end of the feeding screw conveyor 100; the first transmission section comprises a first fish scale sealing structure 221 and a first transmission gear set (comprising a large gear 222 and a small gear 223), the feeding section is connected with the first transmission section through the first fish scale sealing structure 221, the first transmission gear set is connected with a driving motor 224, and particularly, the driving motor 224 is connected with the small gear 223 in the first transmission gear set; the pyrolysis section comprises a heating chamber 231 and a pyrolysis cavity 232, the heating chamber 231 is arranged outside the pyrolysis cavity 232 and is spaced from the pyrolysis cavity 232, and the heating chamber 231 is provided with a high-temperature medium inlet 233 and a tail gas outlet 234; the pyrolysis cavity 232 is communicated with the feeding section through a first transmission section; the second transmission section comprises a second fish scale sealing structure 241 and a second transmission gear set (comprising a wheel belt 242 and a tug 243), and the pyrolysis cavity 232 is connected with the second transmission section; the discharging section is connected with the second transmission section through a second fish scale sealing structure 241 and communicated to the pyrolysis cavity 232, and the discharging section is provided with a pyrolysis gas product outlet 251 and a pyrolysis solid product outlet 252.
According to the embodiment of the invention, the oily sludge enters the rotary pyrolysis furnace 200, and complex reactions such as drying and pyrolysis are carried out at the temperature of 450-600 ℃ to generate pyrolysis oil gas (pyrolysis gas product) and solid slag (pyrolysis solid product). The internal pyrolysis temperature of the rotary pyrolysis furnace 200 is 450-600 ℃, the retention time of the oily sludge is 40-75 min, and the filling rate of the rotary pyrolysis furnace barrel is 15-20%. The time for the pyrolysis reaction can be controlled by controlling the rotating speed of the cylinder body and further controlling the retention time of the oily sludge in the cylinder body. The inventor finds that if the filling rate of the oily sludge in the barrel is too large, the oily sludge is easy to be pyrolyzed insufficiently, and if the filling rate is too small, the efficiency of the pyrolysis treatment is seriously affected. In addition, according to some embodiments of the present invention, the pyrolysis of the oily sludge is performed under anaerobic conditions, thereby avoiding the risk of explosion and ensuring the safety of the whole system.
According to an embodiment of the present invention, the heating chamber 231 is constructed by a refractory brick wall 235, which can resist a fire of 1000 ℃ or more. The temperature of the high-temperature medium in the heating chamber 231 is controlled to be 750-800 ℃ by comprehensively considering the conditions of sealing and model selection heat dissipation of the equipment room, so that the temperature in the pyrolysis cavity 232 can be controlled to be 450-600 ℃.
According to the embodiment of the invention, the cylinder of the rotary pyrolysis furnace 200 is fixedly welded with the large gear 222 and the belt 242, the small gear 223 is rotated by the driving motor 224, gear rotation is performed between the small gear 223 and the large gear 222, and then the cylinder of the rotary pyrolysis furnace 200 is rotated. The other end of the rotary pyrolysis furnace is rotated in an auxiliary manner through the wheel belt 242 and the tug 243, and the rotating speed is 1-5 r/min.
According to the embodiment of the invention, the processing capacity of the rotary pyrolysis furnace 200 is 0.5-5 t/h and is matched with the processing capacity of the feeding screw conveyor 100.
According to the embodiment of the invention, the outer walls of the rotary pyrolysis furnace at the feeding section, the first transmission section, the second transmission section and the discharging section are made of steel materials resistant to high temperature of 800 ℃, and the outer walls are provided with the heat insulation layer 220, so that the effects of preventing heat loss and overhigh system energy consumption are achieved. The insulating layer 220 may be made of rock wool or aluminum silicate.
According to an embodiment of the present invention, a plurality of fixed shoveling plates 236 and a plurality of stirring chains 237 are disposed within the pyrolysis chamber 232 of the rotary pyrolysis furnace. According to the specific example of the invention, 3-4 fixed shoveling plates or stirring chains can be welded on the vertical plane of the heating cavity, and the fixed shoveling plates and the stirring chains are made of steel materials resistant to high temperature of 800 ℃; the fixed shoveling plates 236 can orderly push materials in the heating cavity, so that the materials can be effectively and uniformly distributed, the retention time of the materials is ensured, and the problems of incomplete drying and pyrolysis and the like caused by material agglomeration are solved. Along with the rotation of the pyrolysis section, the stirring chain 237 can stir and smash the oily sludge, prevent agglomeration and play a better role in drying and pyrolyzing the inside of the oily sludge.
According to an embodiment of the present invention, an exit airlock 310 is provided between the pyrolysis solid product outlet 252 of the rotary pyrolysis furnace and the exit screw conveyor 300. The discharge airlock 310 is a well-established device in the art that can function to isolate the interior of the rotary pyrolysis furnace from the outside air. The feeding airlock is a star-shaped feeding valve, and the bottom of the valve is provided with a component for preventing blockage, cleaning slag, a rotary valve, a control motor and the like.
According to an embodiment of the present invention, the discharge screw conveyor 300 may be a water-cooled screw conveyor. The discharge screw conveyor may have a cold water inlet 320, a cold water outlet 330, and a discharge outlet 340. Therefore, the solid slag after pyrolysis can be indirectly cooled through a cold water medium and conveyed to the discharge hole 340 for collection. The water-cooled screw conveyer is mature equipment in the field and comprises a motor, a screw blade, a shell, an external water-cooled jacket and the like. According to some embodiments of the invention, the temperature at the outlet of the discharge airlock is about 350 ℃, the cold water inlet temperature is about 20 ℃, the cold water outlet temperature is about 90 ℃, and the discharge outlet temperature is about 200 ℃.
According to an embodiment of the present invention, the rotary type oily sludge treatment system of the present invention may further include: a hot blast stove 400. The hot blast stove 400 has a fuel inlet and a high temperature medium outlet, which is connected to the high temperature medium inlet 233 of the heating chamber 231. Therefore, hot air generated by combustion in the hot air furnace can be used as a high-temperature medium for indirectly heating the oil-containing sludge. The hot blast stove can adopt mature equipment in the field, and comprises a burner, a primary fan, a secondary fan and the like.
According to an embodiment of the present invention, the rotary type oily sludge treatment system of the present invention may further include: and the condensation purification device (not shown in the drawing) is provided with a pyrolysis gas product inlet, a non-condensable gas outlet and a pyrolysis oil outlet, and the non-condensable gas outlet and the pyrolysis oil outlet are connected with a fuel inlet of the hot blast stove. Therefore, the non-condensable gas and pyrolysis oil obtained by condensing and purifying the gas product generated by the oily sludge treatment can be used as the fuel of the hot blast stove. The condensation purification device can adopt equipment mature in the field.
According to an embodiment of the present invention, the rotary type oily sludge treatment system of the present invention may further include: and the oxygen content detection device (not shown in the drawing) is arranged at the pyrolysis gas product outlet, and a nitrogen inlet is also arranged at the pyrolysis gas product outlet and is communicated to a nitrogen source. Through set up oxygen content detection device at pyrolysis gas exit, can detect the oxygen content in rotatory pyrolysis oven 200 in real time, when the oxygen content is too high (for example more than 3v ‰) in rotatory pyrolysis oven 200, nitrogen gas inlet is opened and to rotatory pyrolysis oven 200 in the input nitrogen gas to guarantee system safety.
In summary, the continuous type oily sludge pyrolysis system according to the embodiment of the present invention may have at least one of the following advantages: (1) the equipment runs reliably, can run stably for a long period, and has low failure rate. (2) And a nitrogen protection mechanism is arranged, so that the system safety is high. (3) The non-condensable gas and the pyrolysis oil are returned to the hot blast stove for combustion, so that the emission of waste gas is reduced, and the aim of reducing the operation cost is fulfilled. (4) The oily sludge is fed by a screw, is uniformly stirred and is conveyed, so that coking is avoided in the oily sludge treatment process. (5) The solid slag is used for paving oil field roads, paving well sites, sealing up and covering soil of solid waste fields, filling waste oil sand pits and the like.
In another aspect of the invention, the invention provides an oily sludge treatment method implemented by adopting the rotary oily sludge treatment system of the embodiment. According to an embodiment of the present invention, the method for treating oily sludge includes: feeding the oily sludge into a rotary pyrolysis furnace by using a feeding screw conveyor for pyrolysis treatment to obtain pyrolysis gas products and pyrolysis solid products; the high temperature medium is supplied to a heating chamber for providing heat for the pyrolysis process.
According to an embodiment of the present invention, the liquid content (the sum of the water content and the oil content) of the oil-containing sludge may be 20 to 40 wt%, for example, 20 wt%, 25 wt%, 30 wt%, 35 wt%, 40 wt%, or the like. If the liquid content of the oily sludge is too high, the sludge may be difficult to feed, the treatment efficiency may be reduced, and the thermal efficiency of the whole equipment may be adversely affected. According to some embodiments of the present invention, for oily sludge with too high liquid content, it can be dehydrated and deoiled in advance before feeding.
According to an embodiment of the present invention, the average particle diameter of the above-mentioned oily sludge may be not more than 30mm, for example, 30mm, 25mm, 20mm, 15mm, 10mm, 5mm, etc. The situation that the average grain size of the oily sludge is too high can cause the blockage of feeding airlock, incomplete drying, incomplete pyrolysis reaction and the like, and the oily sludge with too high grain size needs to be pre-sorted and crushed.
According to the embodiment of the invention, the filling rate of the rotary pyrolysis furnace barrel can be 15-20%, such as 15%, 16%, 18%, 20% and the like. If the filling rate of the oily sludge in the cylinder is too high, the oily sludge is easy to be pyrolyzed insufficiently, and if the filling rate is too low, the pyrolysis treatment efficiency is seriously influenced.
According to the embodiment of the invention, the temperature of the high-temperature medium is 750-850 ℃, such as 750 ℃, 780 ℃, 800 ℃, 820 ℃, 850 ℃ and the like. According to an embodiment of the present invention, the pyrolysis treatment can be performed at 450 to 600 ℃ (e.g., 450 ℃, 500 ℃, 550 ℃, 600 ℃, etc.) for 40 to 75min (e.g., 40min, 45min, 50min, 55min, 60min, 65min, 70min, 75min, etc.). The conditions of sealing and model selection heat dissipation of equipment room are comprehensively considered, the temperature of the high-temperature medium is controlled to be 750-800 ℃, and the temperature in the pyrolysis cavity 232 can be controlled to be 450-600 ℃. The time for the pyrolysis treatment (the residence time of the oily sludge in the pyrolysis cavity of the rotary pyrolysis furnace) can be controlled by controlling the rotating speed of the barrel of the rotary pyrolysis furnace.
According to an embodiment of the present invention, the method for treating oily sludge of the present invention further comprises: fuel is fed to the stove for combustion in order to obtain a high temperature medium.
According to an embodiment of the present invention, the method for treating oily sludge of the present invention further comprises: and supplying the pyrolysis gas product to a condensation purification device for condensation purification to obtain non-condensable gas and pyrolysis oil, and supplying the non-condensable gas and the pyrolysis oil serving as fuel to the hot blast stove for combustion.
According to an embodiment of the present invention, the method for treating oily sludge of the present invention further comprises: the nitrogen gas inlet is controlled to be opened or closed based on the detection result of the oxygen content detection means so as to control the oxygen content in the rotary pyrolysis furnace. Through set up oxygen content detection device in pyrolysis gas exit, can detect the oxygen content in the rotatory pyrolysis oven in real time, when the oxygen content is too high (for example be higher than 3v ‰) in the rotatory pyrolysis oven, nitrogen gas inlet is opened and to the rotatory pyrolysis oven in input nitrogen gas to guarantee system safety.
In addition, it should be noted that the oily sludge treatment system is implemented by using the rotary oily sludge treatment system of the above embodiment, so that all the features and advantages described in the foregoing description for the rotary oily sludge treatment system are provided, and are not repeated herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A rotary oily sludge treatment system, comprising:
a feed screw conveyor;
the rotary pyrolysis furnace sequentially comprises a feeding section, a first transmission section, a pyrolysis section, a second transmission section and a discharging section along the length direction, wherein,
the feeding section is connected with the discharging end of the feeding spiral conveyor, and a feeding air lock is arranged between the feeding section and the discharging end of the feeding spiral conveyor;
the first transmission section comprises a first fish scale sealing structure and a first transmission gear set, the feeding section is connected with the first transmission section through the first fish scale sealing structure, and the first transmission gear set is connected with a driving motor;
the pyrolysis section comprises a heating chamber and a pyrolysis cavity, the heating chamber is arranged outside the pyrolysis cavity and is spaced from the pyrolysis cavity, and the heating chamber is provided with a high-temperature medium inlet and a tail gas outlet; the pyrolysis cavity is communicated with the feeding section through the first transmission section;
the second transmission section comprises a second fish scale sealing structure and a second transmission gear set, and the pyrolysis cavity is connected with the second transmission section;
the discharging section is connected with the second transmission section through the second fish scale sealing structure and communicated to the pyrolysis cavity, and the discharging section is provided with a pyrolysis gas product outlet and a pyrolysis solid product outlet;
and the feeding end of the discharging screw conveyor is connected with the pyrolysis solid product outlet, and a discharging air lock is arranged between the feeding end of the discharging screw conveyor and the pyrolysis solid product outlet.
2. The rotary oily sludge treatment system according to claim 1 wherein the pitch of the feed screw conveyor is 200 to 500 mm;
optionally, the discharge screw conveyor is a water-cooled screw conveyor having a cold water inlet, a cold water outlet, and a discharge outlet.
3. The rotary oily sludge treatment system according to claim 1, wherein the outer walls of the rotary pyrolysis furnace at the feeding section, the first transmission section, the second transmission section and the discharging section are provided with heat insulation layers.
4. The rotary oily sludge treatment system according to claim 1 wherein a plurality of fixed shoveling plates and a plurality of stirring chains are distributed in the pyrolysis cavity.
5. The rotary oily sludge treatment system according to claim 1 further comprising: the hot blast stove is provided with a fuel inlet and a high-temperature medium outlet, and the high-temperature medium outlet is connected with the high-temperature medium inlet of the heating chamber.
6. The rotary oily sludge treatment system according to claim 5 further comprising: the condensation purification device is provided with a pyrolysis gas product inlet, a non-condensable gas outlet and a pyrolysis oil outlet, and the non-condensable gas outlet and the pyrolysis oil outlet are connected with a fuel inlet of the hot blast stove.
7. The rotary oily sludge treatment system according to claim 1 further comprising: the oxygen content detection device is arranged at the pyrolysis gas product outlet, and a nitrogen inlet is also arranged at the pyrolysis gas product outlet.
8. An oily sludge treatment method implemented by using the rotary oily sludge treatment system according to any one of claims 1 to 7, comprising:
feeding the oily sludge into a rotary pyrolysis furnace by using a feeding screw conveyor for pyrolysis treatment to obtain pyrolysis gas products and pyrolysis solid products;
a high temperature medium is supplied to the heating chamber for providing heat for the pyrolysis process.
9. The method according to claim 8, wherein the liquid content of the oily sludge is 20-40 wt%;
optionally, the average particle size of the oily sludge is not greater than 30 mm;
optionally, the filling rate of the rotary pyrolysis furnace barrel is 15-20%;
optionally, the temperature of the high-temperature medium is 750-850 ℃;
optionally, the pyrolysis treatment is carried out at 450-600 ℃ for 40-75 min.
10. The method of claim 8, further comprising: feeding fuel to the hot blast stove for combustion so as to obtain the high-temperature medium;
optionally, further comprising: feeding the pyrolysis gas product to a condensation purification device for condensation purification to obtain non-condensable gas and pyrolysis oil, and feeding the non-condensable gas and the pyrolysis oil serving as the fuel to the hot blast stove for combustion;
optionally, further comprising: the nitrogen gas inlet is controlled to be opened or closed based on the detection result of the oxygen content detection means so as to control the oxygen content in the rotary pyrolysis furnace.
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| CN202010051988.XA CN111153576A (en) | 2020-01-17 | 2020-01-17 | Rotary oily sludge treatment system and method |
| PCT/CN2020/074489 WO2021142863A1 (en) | 2020-01-17 | 2020-02-07 | Method for preparing straight-chain dextrin |
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| CN202010051988.XA CN111153576A (en) | 2020-01-17 | 2020-01-17 | Rotary oily sludge treatment system and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662734A (en) * | 2020-05-20 | 2020-09-15 | 中国科学院广州能源研究所 | Oil-containing solid waste disposal system based on pyrolysis technology |
| CN111960633A (en) * | 2020-07-03 | 2020-11-20 | 北京云水浩瑞环境科技有限公司 | Roller pyrolysis machine and pyrolysis method |
| CN114212959A (en) * | 2022-02-23 | 2022-03-22 | 仁天环保科技有限责任公司 | Sludge carbonization integrated equipment |
| CN117735800A (en) * | 2023-12-07 | 2024-03-22 | 湖南清源华建环境科技有限公司 | Efficient pyrolysis system for sludge |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104327868A (en) * | 2014-11-03 | 2015-02-04 | 厦门中科城环新能源有限公司 | External heating type pyrolysis carbonization furnace suitable for carbonizing treatment of sludge at medium temperature |
| CN207646039U (en) * | 2017-11-20 | 2018-07-24 | 绵阳油普能源科技有限责任公司 | Electrothermic industry serialization oil sludge thermally decomposes skid mounted equipment |
| CN109880642A (en) * | 2019-03-28 | 2019-06-14 | 北京云水浩瑞环境科技有限公司 | The system and method for handling house refuse oversize |
| CN110615590A (en) * | 2019-10-08 | 2019-12-27 | 北京云水浩瑞环境科技有限公司 | Sludge pyrolysis system and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4656620B2 (en) * | 2001-05-28 | 2011-03-23 | 江崎グリコ株式会社 | Preparation of sucrose phosphorylase |
| DK2049673T3 (en) * | 2006-08-11 | 2011-07-04 | Danisco Us Inc | Native grain amylases in enzyme combinations for hydrolysis of granular starch |
-
2020
- 2020-01-17 CN CN202010051988.XA patent/CN111153576A/en active Pending
- 2020-02-07 WO PCT/CN2020/074489 patent/WO2021142863A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104327868A (en) * | 2014-11-03 | 2015-02-04 | 厦门中科城环新能源有限公司 | External heating type pyrolysis carbonization furnace suitable for carbonizing treatment of sludge at medium temperature |
| CN207646039U (en) * | 2017-11-20 | 2018-07-24 | 绵阳油普能源科技有限责任公司 | Electrothermic industry serialization oil sludge thermally decomposes skid mounted equipment |
| CN109880642A (en) * | 2019-03-28 | 2019-06-14 | 北京云水浩瑞环境科技有限公司 | The system and method for handling house refuse oversize |
| CN110615590A (en) * | 2019-10-08 | 2019-12-27 | 北京云水浩瑞环境科技有限公司 | Sludge pyrolysis system and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662734A (en) * | 2020-05-20 | 2020-09-15 | 中国科学院广州能源研究所 | Oil-containing solid waste disposal system based on pyrolysis technology |
| CN111960633A (en) * | 2020-07-03 | 2020-11-20 | 北京云水浩瑞环境科技有限公司 | Roller pyrolysis machine and pyrolysis method |
| CN114212959A (en) * | 2022-02-23 | 2022-03-22 | 仁天环保科技有限责任公司 | Sludge carbonization integrated equipment |
| CN117735800A (en) * | 2023-12-07 | 2024-03-22 | 湖南清源华建环境科技有限公司 | Efficient pyrolysis system for sludge |
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| WO2021142863A1 (en) | 2021-07-22 |
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