CN111718765A - Device and absorption method for fuel oil in plastic pyrolysis gas - Google Patents
Device and absorption method for fuel oil in plastic pyrolysis gas Download PDFInfo
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- CN111718765A CN111718765A CN202010597196.2A CN202010597196A CN111718765A CN 111718765 A CN111718765 A CN 111718765A CN 202010597196 A CN202010597196 A CN 202010597196A CN 111718765 A CN111718765 A CN 111718765A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
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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
- C10B53/07—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of solid raw materials consisting of synthetic polymeric materials, e.g. tyres
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
Abstract
The invention belongs to the field of environmental protection, and particularly relates to a device for fuel oil in plastic cracking gas, which comprises a spray absorption tower, wherein the surface of the spray absorption tower is fixedly connected with a pipeline, the side surface of the spray absorption tower is connected with a second heat exchanger through a pipeline, the second heat exchanger is connected with a first heat exchanger through a pipeline, the first heat exchanger is connected with a cooler through a pipeline, the spray absorption tower is connected with a first oil pump through a pipeline, the cooler is connected with a first condenser through a pipeline, the first condenser is connected with a first heavy oil tank through a pipeline, and the first heavy oil tank is connected with a centrifugal separator through a pipeline; according to the invention, the spray absorption tower, the first spray port, the second spray port and the third spray port are arranged, the spray absorption tower is adopted for absorption, three-stage spraying is adopted, the temperature of sprayed recovered oil is from high to low, and heavy oil and light oil in the pyrolysis gas are sequentially recovered, so that multi-stage spraying is achieved.
Description
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to a method for absorbing and condensing pyrolysis gas generated by plastic pyrolysis into fuel oil. Waste plastics are cracked into plastic cracking gas by oxygen-free heating, and the cracking gas contains vaporized heavy oil, light oil, non-condensable gas, water vapor, carbon powder and other substances. The heavy oil, light oil and non-condensable gas can be used as fuel, and the process method is designed for condensing and absorbing the heavy oil and light oil in the pyrolysis gas better. The production process adopts a spray tower for absorption and three-stage spraying, the temperature of sprayed recovered oil is from high to low, and the heavy oil and the light oil in the pyrolysis gas are sequentially recovered. And the recovered heavy oil and light oil can be subjected to multi-stage spraying, and after being cooled by the heat exchanger, one part of the recovered heavy oil and light oil is conveyed to a peripheral oil storage tank by a pump according to different temperature requirements, and the other part of the recovered heavy oil and light oil is injected into a spray tower to participate in the recovery of the heavy oil and light oil in the pyrolysis gas.
Background
The solid waste materials recycled in China every year contain a large amount of waste plastics, most of the waste plastics are incinerated by a waste incineration power plant to generate electricity, however, the solid waste materials bring dangerous side effects, such as dioxin easily generated by plastic combustion, and the dioxin is known to be a strong carcinogenic substance. In recent years, the technology for processing the waste plastics by using the waste plastics to produce fuel oil through pyrolysis under the oxygen-free condition is greatly developed. The fuel oil is obtained while the waste plastics are treated, which is an advanced technology for treating the waste plastics, is a solid waste treatment technology with small influence on the environment and has development prospect. However, in the process of recovering fuel oil by plastic cracking, the oil recovery is insufficient, which is always a difficult problem, influences the popularization of the technology, and the invention better solves the problem. The fuel recovery rate is improved by more than 50%.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a device and an absorption method for fuel oil in plastic pyrolysis gas, which have the characteristics of good recovery effect and the like.
In order to achieve the purpose, the invention provides the following technical scheme: a device for fuel oil in plastic cracking gas comprises a spray absorption tower, wherein a pipeline is fixedly connected to the surface of the spray absorption tower, the side surface of the spray absorption tower is connected with a second heat exchanger through a pipeline, the second heat exchanger is connected with a first heat exchanger through a pipeline, the first heat exchanger is connected with a cooler through a pipeline, the spray absorption tower is connected with a first oil pump through a pipeline, the cooler is connected with a first condenser through a pipeline, and the first condenser is connected with a first heavy oil tank through a pipeline;
the first heavy oil tank is connected with a centrifugal separator through a pipeline, the centrifugal separator is connected with a second heavy oil tank through a pipeline, the side face of the second heavy oil tank is connected with a third oil pump through a pipeline, the first heavy oil tank is connected with an oil-water separation tank through a pipeline, the side face of the oil-water separation tank is connected with a light oil tank through a pipeline, the light oil tank is connected with a second oil pump through a pipeline, the oil-water separation tank is connected with a second condenser through a pipeline, and the pipeline surface is provided with a pipeline valve.
Preferably, the side surface of the spray absorption tower is provided with a cracking gas inlet, the side surface of the spray absorption tower is provided with a first spray port, the side surface of the spray absorption tower is provided with a second spray port, and the side surface of the spray absorption tower is provided with a third spray port.
A device and an absorption method for fuel oil in plastic pyrolysis gas comprise the following steps:
the method comprises the following steps: the plastic cracking gas (350 ℃ to 400 ℃) enters a tower body of the spray absorption tower from a cracking gas inlet;
step two: the first oil pump pumps hot oil at about 150-200 ℃ at the bottom of the spray absorption tower, one part (flow control) of the hot oil is pumped into a first spray port, plastic pyrolysis gas (350-400 ℃) is sprayed, carbon powder in the pyrolysis gas is adsorbed, heavy oil with the boiling point higher than 200 ℃ in the pyrolysis gas is captured, and the other part of the heavy oil enters a second heat exchanger to heat the heavy oil (80 ℃) in a second heavy oil tank 8 pumped out by a third oil pump;
step three: heating the heavy oil pumped out by the third oil pump to 150-160 ℃;
step four: the heavy oil at the temperature of 150 ℃ and 160 ℃ enters a second spraying port to collect the heavy oil at the temperature of 150 ℃ and 200 ℃ in the cracked gas;
step five: at the moment, the temperature of hot oil pumped by the first oil pump is reduced to about 130 ℃, heavy oil at about 130 ℃ continues to move forwards, the heavy oil enters the first heat exchanger, light oil (60 ℃) in a light oil tank pumped by the second oil pump is heated, the heavy oil pumped by the third oil pump is heated to 120 ℃ along with 110-;
step six: at the moment, the temperature of hot oil pumped by the first oil pump is reduced to about 80 ℃, the heavy oil at about 80 ℃ continues to move forwards, enters a cooler, is cooled to about 60 ℃ by cooling water at 30 ℃, and enters a first heavy oil tank;
step seven: after solid-liquid separation by a centrifugal separator, liquid enters a second heavy oil tank and is repeatedly sprayed, and redundant heavy oil is pumped to the second heavy oil tank by a third oil pump and a valve under the control of a liquid level switch;
step eight: discharging the solid out of the workshop;
step nine: the light oil and the moisture which are not condensed and collected at the top of the spray absorption tower enter a first condenser, are cooled to about 50 ℃ by cooling water at 30 ℃, enter an oil-water separation tank, are subjected to oil-water separation, then enter a light oil tank, repeatedly work and spray, and the redundant light oil is controlled by a liquid level switch and pumped to an outer second oil tank by a second oil pump and a valve;
step ten: discharging water out of the workshop;
step eleven: oil gas in each oil tank is collected to the second condenser, gas is emptied after condensation, and liquid enters the oil-water separation tank.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the spray absorption tower, the first spray port, the second spray port and the third spray port are arranged, the spray absorption tower is adopted for absorption, three-stage spraying is adopted, the temperature of sprayed recovered oil is from high to low, and heavy oil and light oil in the pyrolysis gas are sequentially recovered, so that multi-stage spraying is achieved.
2. According to the invention, after the heavy oil and the light oil recovered by the first heat exchanger and the second heat exchanger are cooled by the first heat exchanger and the second heat exchanger, part of the heavy oil and the light oil are conveyed to the second heavy oil tank by a pump according to different temperature requirements, and the other part of the heavy oil and the light oil are injected into the spray absorption tower to participate in the recovery of the heavy oil and the light oil in the cracked gas.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a process flow diagram of the present invention;
in the figure: 1. spraying an absorption tower; 101. a pyrolysis gas inlet; 102. a first spray port; 103. a second spray port; 104. a third spray port; 2. a cooler; 3. a first heat exchanger; 4. a second heat exchanger; 5. a first oil pump; 6. a first condenser; 7. a first heavy oil tank; 8. a second heavy oil tank; 9. a centrifugal separator; 10. an oil-water separation tank; 11. a second condenser; 12. a light oil tank; 13. a second oil pump; 14. a third oil pump; 15. pipeline valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, the present invention provides the following technical solutions: a device for cracking fuel oil in gas by plastics comprises a spray absorption tower 1, wherein the surface of the spray absorption tower 1 is fixedly connected with a pipeline, the side surface of the spray absorption tower 1 is connected with a second heat exchanger 4 through the pipeline, after the heavy oil and the light oil recovered by the first heat exchanger 3 and the second heat exchanger 4 are cooled by the first heat exchanger 3 and the second heat exchanger 4, according to different temperature requirements, one part is conveyed to a second heavy oil tank 8 by a pump, and the other part is pumped into a spray absorption tower 1 to participate in the recovery of heavy oil and light oil in the cracked gas, the second heat exchanger 4 is connected with a first heat exchanger 3 through a pipeline, the first heat exchanger 3 is connected with a cooler 2 through a pipeline, the spray absorption tower 1 is connected with a first oil pump 5 through a pipeline, the cooler 2 is connected with a first condenser 6 through a pipeline, and the first condenser 6 is connected with a first heavy oil tank 7 through a pipeline;
the first heavy oil tank 7 is connected with a centrifugal separator 9 through a pipeline, the centrifugal separator 9 is connected with a second heavy oil tank 8 through a pipeline, the side surface of the second heavy oil tank 8 is connected with a third oil pump 14 through a pipeline, the first heavy oil tank 7 is connected with an oil-water separation tank 10 through a pipeline, the side surface of the oil-water separation tank 10 is connected with a light oil tank 12 through a pipeline, the light oil tank 12 is connected with a second oil pump 12 through a pipeline, the oil-water separation tank 10 is connected with a second condenser 11 through a pipeline, and a pipeline valve 15 is arranged on the surface of the pipeline.
Specifically, a pyrolysis gas inlet 101 is arranged on the side surface of the spray absorption tower 1, a first spray port 102 is arranged on the side surface of the spray absorption tower 1, a second spray port 103 is arranged on the side surface of the spray absorption tower 1, a third spray port 104 is arranged on the side surface of the spray absorption tower 1, and the spray absorption tower 1 is adopted for absorption and three-stage spraying by arranging the spray absorption tower 1, the first spray port 102, the second spray port 103 and the third spray port 104, so that the heavy oil and the light oil in the pyrolysis gas are sequentially recovered from high to low in temperature of sprayed recovered oil, and multi-stage spraying is achieved.
A device and an absorption method for fuel oil in plastic pyrolysis gas comprise the following steps:
the method comprises the following steps: the plastic cracking gas with the temperature of 350-400 ℃ enters a tower body of the spray absorption tower 1 from a cracking gas inlet 101;
step two: the first oil pump 5 pumps hot oil at the bottom of the spray absorption tower 1 at about 150-200 ℃, one part of the hot oil is pumped into the first spray port 102 in a flow control manner, the plastic pyrolysis gas is sprayed at 350-400 ℃, carbon powder in the pyrolysis gas is adsorbed, heavy oil with the boiling point higher than 200 ℃ in the pyrolysis gas is captured, the other part of the heavy oil enters the second heat exchanger 4, and the heavy oil in the second heavy oil tank 88 pumped out by the third oil pump 14 is heated at 80 ℃;
step three: heating the heavy oil pumped by the third oil pump 14 to 150 ℃ and 160 ℃;
step four: the heavy oil at the temperature of 150 ℃ and 160 ℃ enters the second spraying port 103 to collect the heavy oil at the temperature of 150 ℃ and 200 ℃ in the cracked gas;
step five: at this time, the temperature of the hot oil pumped by the first oil pump 5 is reduced to about 130 ℃, the heavy oil at about 130 ℃ continues to move forward, the heavy oil enters the first heat exchanger 3, the light oil at 60 ℃ in the light oil tank 12 pumped by the second oil pump 12 is heated, the heavy oil pumped by the third oil pump 14 is heated to 120 ℃ along with 110-;
step six: at the moment, the temperature of hot oil pumped by the first oil pump 5 is reduced to about 80 ℃, the heavy oil at about 80 ℃ continues to move forwards, enters the cooler 2, is cooled to about 60 ℃ by cooling water at 30 ℃, and enters the first heavy oil tank 7;
step seven: after solid-liquid separation by a centrifugal separator 9, the liquid enters a second heavy oil tank 8, repeated working and spraying are carried out, and redundant heavy oil is pumped to the second heavy oil tank 8 by a third oil pump 14 and a valve under the control of a liquid level switch;
step eight: discharging the solid out of the workshop;
step nine: the light oil and the moisture which are not condensed and collected at the top of the spray absorption tower 1 enter a first condenser 6, are cooled to about 50 ℃ by cooling water at 30 ℃, enter an oil-water separation tank 10, are subjected to oil-water separation, then enter a light oil tank 12, are sprayed repeatedly, and redundant light oil is pumped to an outer second oil tank 8 by a second oil pump 12 and a valve under the control of a liquid level switch;
step ten: discharging water out of the workshop;
step eleven: the oil gas in each oil tank is collected to the second condenser 11, the gas is emptied after condensation, and the liquid enters the oil-water separation tank 10.
The working principle and the using process of the invention are as follows: when the device is used, the plastic cracking gas at 350-400 ℃ enters the tower body of the spray absorption tower 1 from the cracking gas inlet 101, the first oil pump 5 pumps hot oil at about 150-. The temperature of the hot oil pumped by the first oil pump 5 is reduced to about 130 ℃. The heavy oil at about 130 ℃ continues to move forward, enters the first heat exchanger 3, heats the light oil at 60 ℃ in the light oil tank 12 pumped by the second oil pump 12, heats the heavy oil pumped by the third oil pump 14 to 110-. The temperature of the hot oil pumped by the first oil pump 5 is reduced to about 80 ℃. The heavy oil at about 80 ℃ continues to move forward, enters the cooler 2, is cooled to about 60 ℃ by cooling water at 30 ℃, enters the first heavy oil tank 7, is subjected to solid-liquid separation by the centrifugal separator 9, then enters the second heavy oil tank 8, is sprayed by repeated work, and the redundant heavy oil is pumped to the second heavy oil tank 8 by the third oil pump 14 and a valve under the control of a liquid level switch. And discharging the solid out of the workshop. The light oil and the water which are not condensed and collected at the top of the spray absorption tower 1 enter a first condenser 6, are cooled to about 50 ℃ by cooling water at 30 ℃, enter an oil-water separation box 10, are subjected to oil-water separation, then enter a light oil tank 12, are sprayed by repeated operation, and the redundant light oil is pumped to a second heavy oil tank 8 by a second oil pump 12 and a valve under the control of a liquid level switch. The water is discharged out of the workshop. The oil gas in each oil tank is collected to the second condenser 11, the gas is emptied after condensation, and the liquid enters the oil-water separation tank 10. The technological process of absorbing and condensing the cracked gas generated by cracking the plastics into fuel oil is completed.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a device of fuel oil in plastics pyrolysis gas, includes sprays absorption tower (1), its characterized in that: the surface of the spray absorption tower (1) is fixedly connected with a pipeline, the side surface of the spray absorption tower (1) is connected with a second heat exchanger (4) through a pipeline, the second heat exchanger (4) is connected with a first heat exchanger (3) through a pipeline, the first heat exchanger (3) is connected with a cooler (2) through a pipeline, the spray absorption tower (1) is connected with a first oil pump (5) through a pipeline, the cooler (2) is connected with a first condenser (6) through a pipeline, and the first condenser (6) is connected with a first heavy oil tank (7) through a pipeline;
first heavy oil tank (7) have centrifuge (9) through the pipe connection, centrifuge (9) have second heavy oil tank (8) through the pipe connection, second heavy oil tank (8) side has third oil pump (14) through the pipe connection, first heavy oil tank (7) have oil water separation case (10) through the pipe connection, oil water separation case (10) side has light oil tank (12) through the pipe connection, light oil tank (12) have second oil pump (12) through the pipe connection, oil water separation case (10) have second condenser (11) through the pipe connection, pipeline surface is provided with pipeline valve (15).
2. The apparatus for fuel oil in plastic cracking gas according to claim 1, wherein: cracking gas inlets (101) are formed in the side faces of the spraying absorption towers (1), first spraying ports (102) are formed in the side faces of the spraying absorption towers (1), second spraying ports (103) are formed in the side faces of the spraying absorption towers (1), and third spraying ports (104) are formed in the side faces of the spraying absorption towers (1).
3. The device and the absorption method for fuel oil in plastic pyrolysis gas as recited in any one of claims 1-2, the use steps are as follows:
the method comprises the following steps: the plastic cracking gas (350 ℃ to 400 ℃) enters a tower body of the spray absorption tower (1) from a cracking gas inlet (101);
step two: the first oil pump (5) pumps a part (flow control) of hot oil at about 150 ℃ and 200 ℃ at the bottom of the spray absorption tower (1) into the first spray port (102), sprays the plastic pyrolysis gas (350 ℃ to 400 ℃), adsorbs carbon powder in the pyrolysis gas, captures heavy oil with the boiling point higher than 200 ℃ in the pyrolysis gas, and the other part enters the second heat exchanger (4) to heat the heavy oil (80 ℃) in the second heavy oil tank (8) 8 pumped out by the third oil pump (14).
4. The device and the absorption method for fuel oil in plastic pyrolysis gas as recited in any one of claims 1-2, the use steps are as follows:
step three: heating the heavy oil pumped by the third oil pump (14) to 150 ℃ and 160 ℃;
step four: the heavy oil at the temperature of 150 ℃ and 160 ℃ enters the second spraying port (103) to collect the heavy oil at the temperature of 150 ℃ and 200 ℃ in the cracked gas.
5. The device and the absorption method for fuel oil in plastic pyrolysis gas as recited in any one of claims 1-2, the use steps are as follows:
step five: at the moment, the temperature of hot oil pumped by the first oil pump (5) is reduced to about 130 ℃, heavy oil at about 130 ℃ continues to move forwards and enters the first heat exchanger (3), light oil (60 ℃) in the light oil tank (12) pumped by the second oil pump (12) is heated, heavy oil pumped by the third oil pump (14) is heated to 110-;
step six: at the moment, the temperature of hot oil pumped by the first oil pump (5) is reduced to about 80 ℃, the heavy oil at about 80 ℃ continues to move forwards, enters the cooler (2), is cooled to about 60 ℃ by cooling water at 30 ℃, and enters the first heavy oil tank (7).
6. The device and the absorption method for fuel oil in plastic pyrolysis gas as recited in any one of claims 1-2, the use steps are as follows:
step seven: after solid-liquid separation by a centrifugal separator (9), liquid enters a second heavy oil tank (8) and is repeatedly sprayed, and redundant heavy oil is pumped to the second heavy oil tank (8) by a third oil pump (14) and a valve under the control of a liquid level switch;
step eight: and discharging the solid out of the workshop.
7. The device and the absorption method for fuel oil in plastic pyrolysis gas as recited in any one of claims 1-2, the use steps are as follows:
step nine: the light oil and the moisture which are not condensed and collected at the top of the spray absorption tower (1) enter a first condenser (6), are cooled to about 50 ℃ by cooling water at 30 ℃, enter an oil-water separation tank (10), are subjected to oil-water separation, then enter a light oil tank (12), are repeatedly sprayed, and the redundant light oil is controlled by a liquid level switch and is pumped to an outer second oil tank (8) by a second oil pump (12) and a valve;
step ten: the water is discharged out of the workshop.
8. The device and the absorption method for fuel oil in plastic pyrolysis gas as recited in any one of claims 1-2, the use steps are as follows:
step eleven: oil gas in each oil tank is collected to a second condenser (11), gas is emptied after condensation, and liquid enters an oil-water separation tank (10).
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| CN209161961U (en) * | 2018-11-29 | 2019-07-26 | 西安道特石化工程有限公司 | A kind of purification-recovery system for damaged tire cracking oil gas |
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