CN113862045A - Pyrolysis gas segmentation processing system - Google Patents
Pyrolysis gas segmentation processing system Download PDFInfo
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- CN113862045A CN113862045A CN202010612613.6A CN202010612613A CN113862045A CN 113862045 A CN113862045 A CN 113862045A CN 202010612613 A CN202010612613 A CN 202010612613A CN 113862045 A CN113862045 A CN 113862045A
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- heavy oil
- oil
- tower
- light oil
- heat exchanger
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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
- C10K1/02—Dust removal
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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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- 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
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/16—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids
- C10K1/18—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids hydrocarbon oils
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a pyrolysis gas segmentation processing system, which comprises: the device comprises a gas fan, an oil-water separator, a first heat exchanger, a second heat exchanger, a light oil pump, a light oil storage tank, a heavy oil pump and a heavy oil settling tank, and is characterized by further comprising a splitting tower, wherein the splitting tower is provided with a tower tray inlet, a tower tray outlet, a light oil return port, a heavy oil outlet and a heavy oil return port, and pyrolysis gas is connected with the tower tray inlet through a pipeline; the coal gas fan is respectively connected with the tower tray outlet of the segmentation tower, the oil-water separator, the light oil storage tank and the heavy oil settling tank through pipelines, and conveys the non-condensable gas to the non-condensable gas collector. The invention utilizes the heat of the pyrolysis gas to complete the separation of light oil, water and heavy oil, and saves the working procedure of distillation and cutting of oil products in the later period; namely, the secondary distillation and segmentation equipment of the oil product is saved, the land investment and the distillation energy consumption are saved, the organic matter content of the collected wastewater is low, generally 5 to 10 percent of the cyclic spraying process is adopted, and the post wastewater treatment cost is reduced.
Description
Technical Field
The invention belongs to the field of chemical industry, and particularly relates to a pyrolysis gas splitting treatment system.
Background
And gasifying the organic solid waste through a pyrolysis furnace to complete a pyrolysis process, and generating pyrolysis oil, pyrolysis water and non-condensable gas. The pyrolysis oil and the non-condensable gas are used as renewable energy sources, so that the aim of treating organic solid waste resources by adopting a pyrolysis process for recycling is fulfilled. For example, chinese utility model CN201621038569 discloses a continuous pyrolysis furnace, which generally sprays pyrolysis gas generated by pyrolysis through a spray tower, condenses and collects pyrolysis water and pyrolysis oil in the pyrolysis gas, and combustable gas which can not be condensed is collected by a collecting device, and is combusted by a hot blast stove of the regenerative pyrolysis furnace to provide heat required by pyrolysis. The pyrolysis gas oil recovery process by spraying has the advantages that: the problems of high-temperature dust removal of pyrolysis gas, good cooling and condensing effects and the like are solved. The following disadvantages exist at the same time: pyrolysis oil and pyrolysis water are difficult to separate; the wastewater in the spray tower is circularly sprayed for a long time, the content of organic matters is high, and the wastewater treatment in the later period is difficult; the pyrolysis oil has low flash point and needs secondary distillation and splitting. In view of the above problems, the high temperature pyrolysis gas treatment system is in need of further improvement.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a pyrolysis gas splitting treatment system which can adapt to the collection and utilization of non-condensable gas of a pyrolysis furnace in a continuous working state.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a pyrolysis gas fractionation processing system, comprising: the device comprises a gas fan, an oil-water separator, a first heat exchanger, a second heat exchanger, a light oil pump, a light oil storage tank, a heavy oil storage tank, a first heavy oil pump, a heavy oil settling tank and a second heavy oil pump, and is characterized by further comprising a splitting tower, wherein the splitting tower is provided with a tower tray inlet, a tower tray outlet, a light oil return port, a heavy oil outlet and a heavy oil return port, and pyrolysis gas is connected with the tower tray inlet through a pipeline; one end of the first heat exchanger is connected with the outlet of the tray through a pipeline, and the other end of the first heat exchanger is connected with the oil-water separator through a pipeline; the oil-water separator is provided with a water outlet and a light oil outlet, one end of the light oil pump is connected with the light oil outlet, the other end of the light oil pump is divided into a first channel and a second channel, the first channel is connected with a light oil reflux port of the splitting tower, and the second channel is connected with a light oil storage tank to discharge light oil; one end of the first heavy oil pump is connected with the heavy oil outlet, and the other end of the first heavy oil pump is connected with the heavy oil settling tank; one end of a second heavy oil pump is connected with the heavy oil settling tank, the other end of the second heavy oil pump is divided into a third channel and a fourth channel, the third channel is connected with one end of the second heat exchanger, the other end of the second heat exchanger is connected with a heavy oil return port through a pipeline, and the fourth channel is connected with a heavy oil storage tank to discharge heavy oil; the coal gas fan is respectively connected with the tower tray outlet of the splitting tower, the oil-water separator, the light oil storage tank and the heavy oil settling tank through pipelines and conveys the non-condensable gas to the non-condensable gas collector.
Further, the first heat exchanger and the second heat exchanger are both water-cooled tube heat exchangers.
The device further comprises a first regulating valve, a second regulating valve, a third regulating valve and a fourth regulating valve, wherein the first regulating valve is arranged between the light oil pump and a light oil return port of the splitting tower; the second regulating valve is arranged between the light oil pump and the light oil storage tank; the third regulating valve is arranged between the second heavy oil pump and the second heat exchanger; the fourth regulating valve is arranged between the second heavy oil pump and the heavy oil storage tank.
Further, the device comprises a slag discharging device, wherein the slag discharging device is respectively arranged at the bottom of the splitting tower and the bottom of the heavy oil settling tank.
As mentioned above, compared with the prior art, the invention has the beneficial effects that: the separation of light oil, water and heavy oil is completed by one step by utilizing the heat of the pyrolysis gas, so that the later oil product distillation and splitting process is omitted; namely, the equipment required by the oil secondary distillation and segmentation process is saved, the land investment is saved, and the distillation energy consumption and other expenses are saved. High-temperature heavy oil sedimentation is adopted, so that coking and blockage of equipment such as a segmentation tower and a pipeline are avoided. Heavy oil is collected by heavy oil back-spraying pyrolysis gas, and the key point is to remove dust and avoid the blockage of a spray tower. A large-circulation sedimentation tank of a spraying process is omitted, and the running cost of land use, electricity use, labor and the like is saved;
the gas fan is adopted to collect the non-condensable gas in a centralized manner and return the non-condensable gas to the furnace for heat supply and utilization, so that the energy consumption is saved, and the pollution to the environment caused by the evacuation of the non-condensable gas is avoided.
Through the program control of liquid level, temperature, pressure and flow parameters, the automatic control is high, and the investment of operators is reduced.
Meanwhile, by adopting the pyrolysis gas splitting treatment system, the content of organic substances in the collected wastewater is low, generally, the circulating spraying process is 5-10%, and the later-stage wastewater treatment cost is greatly reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a pyrolysis gas fractionation system according to the present invention;
FIG. 2 is a control flow diagram of a pyrolysis gas fractionation processing system according to the present invention;
description of reference numerals: 1-pyrolysis gas, 2-gas fan, 3-oil-water separator, 4-first heat exchanger, 5-second heat exchanger, 6-light oil pump, 7-light oil storage tank, 8-heavy oil storage tank, 9-first heavy oil pump, 10-second heavy oil pump, 11-heavy oil settling tank, 12-splitting tower, 13-first regulating valve, 14-second regulating valve, 15-third regulating valve, 16-fourth regulating valve, 17-non-condensable gas collector, 18-water outlet, 19-light oil outlet, 20-first channel, 21-second channel, 22-third channel, 23-fourth channel, 24-second slag outlet, 25-tray inlet, 26-tray outlet, 27-first slag outlet, 28-light oil return port, 29-heavy oil outlet and 30-heavy oil return port.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The invention is further explained with reference to the accompanying drawings, as shown in fig. 1 and fig. 2, a pyrolysis gas splitting processing system has a working flow: organic solid waste is pyrolyzed by a pyrolyzing furnace, generated high-temperature pyrolysis gas is introduced into a splitting tower through a pipeline after heat preservation, and the pyrolysis gas enters through a tower tray in the middle of the splitting tower. Setting the temperature range value of the splitting tower according to the boiling point difference of each molecule in the pyrolysis gas, wherein the temperature is generally set to be 140-200 ℃; for example, the materials such as household garbage, paint residues, waste plastics and tires are different, the temperature values are also different, the temperature of the splitting tower ensures the flash point of heavy oil, and the flash point reaches the GB25989-2010 fuel oil standard. Light oil and water are extracted from an outlet of a tower tray of the splitting tower, condensed and collected in an oil-water separator through a first heat exchanger after extraction, the oil-water separator separates the light oil and the water, the water is discharged from a water outlet of the oil-water separator, and the light oil is output through a light oil pump. The pumping output process of the light oil is completed through two branches of a first channel and a second channel, the first channel is provided with a first regulating valve for controlling the flow of the first channel, and the light oil is quantitatively sent back to the tower through a light oil return port at the top of the splitting tower, so that the temperature at the top of the splitting tower is reduced, and the heavy oil extracted from a tower tray outlet of the splitting tower is reduced; the second passageway is provided with the second governing valve and is connected with the light oil holding vessel, and the most light oil that remain after will refluxing is carried to the storage in the light oil holding vessel and is stored. The control end of the first regulating valve is connected with the control system, and the opening of the first regulating valve is controlled according to a program set value; the control end of the second regulating valve is connected with the control end of the liquid level device of the oil-water separator, and the opening degree of the second regulating valve is controlled according to the height of the liquid level of the oil-water separator.
Outputting heavy oil, wherein one end of a first heavy oil pump is connected with a heavy oil outlet of the splitting tower, and the other end of the first heavy oil pump is connected with a heavy oil settling tank; and (3) conveying the heavy oil from the splitting tower to a heavy oil settling tank, and outputting the heavy oil through a second heavy oil pump after the heavy oil is settled in the heavy oil settling tank. Heavy oil output is completed through two branches of a third channel and a fourth channel, the third channel is provided with a third regulating valve for controlling the flow of the third channel, the heavy oil is quantitatively sent back to the splitting tower through a second heat exchanger and a heavy oil return port of the splitting tower, the overhigh temperature in the splitting tower is resisted, the excessive heavy oil is prevented from being extracted from the top of the tower, and meanwhile, dust entrained by pyrolysis gas in the pyrolysis process is washed away; the fourth channel is connected with the heavy oil storage tank, and most of the residual heavy oil after the backflow is conveyed to the heavy oil storage tank for storage. The control end of the third regulating valve is connected with the control system, and the opening of the third regulating valve is controlled according to the program set value; and the control end of the fourth regulating valve is connected with the control end of the liquid level device of the heavy oil settling tank, and the opening degree of the fourth regulating valve is controlled according to the height of the liquid level of the heavy oil settling tank.
And slag discharge ports are arranged in the splitting tower and the heavy oil settling tank, and the slag discharge work of the heavy oil settling tank is completed periodically.
The non-condensable gas is collected by a gas fan, the gas fan is respectively connected with the tower tray outlet of the segmentation tower, the oil-water separator, the light oil storage tank and the heavy oil settling tank through pipelines, and the non-condensable gas is conveyed to a non-condensable gas collector.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. A pyrolysis gas fractionation processing system, comprising: the device comprises a gas fan, an oil-water separator, a first heat exchanger, a second heat exchanger, a light oil pump, a light oil storage tank, a heavy oil storage tank, a first heavy oil pump, a heavy oil settling tank and a second heavy oil pump, and is characterized by further comprising a splitting tower, wherein the splitting tower is provided with a tower tray inlet, a tower tray outlet, a light oil return port, a heavy oil outlet and a heavy oil return port, and pyrolysis gas is connected with the tower tray inlet through a pipeline; one end of the first heat exchanger is connected with the outlet of the tray through a pipeline, and the other end of the first heat exchanger is connected with the oil-water separator through a pipeline; the oil-water separator is provided with a water outlet and a light oil outlet, one end of the light oil pump is connected with the light oil outlet, the other end of the light oil pump is divided into a first channel and a second channel, the first channel is connected with a light oil reflux port of the splitting tower, and the second channel is connected with a light oil storage tank to discharge light oil; one end of the first heavy oil pump is connected with the heavy oil outlet, and the other end of the first heavy oil pump is connected with the heavy oil settling tank; one end of a second heavy oil pump is connected with the heavy oil settling tank, the other end of the second heavy oil pump is divided into a third channel and a fourth channel, the third channel is connected with one end of the second heat exchanger, the other end of the second heat exchanger is connected with a heavy oil return port through a pipeline, and the fourth channel is connected with a heavy oil storage tank to discharge heavy oil; the coal gas fan is respectively connected with the tower tray outlet of the splitting tower, the oil-water separator, the light oil storage tank and the heavy oil settling tank through pipelines and conveys the non-condensable gas to the non-condensable gas collector.
2. The system for pyrolysis gas cutting processing according to claim 1, wherein the first heat exchanger and the second heat exchanger are both water-cooled tube heat exchangers.
3. The system for processing the split of the pyrolysis gas according to claim 1, further comprising a first regulating valve, a second regulating valve, a third regulating valve and a fourth regulating valve, wherein the first regulating valve is arranged between the light oil pump and a light oil return port of the splitting tower; the second regulating valve is arranged between the light oil pump and the light oil storage tank; the third regulating valve is arranged between the second heavy oil pump and the second heat exchanger; the fourth regulating valve is arranged between the second heavy oil pump and the heavy oil storage tank.
4. The system of claim 1, further comprising a slag discharge device disposed at the bottom of the separation tower and the bottom of the heavy oil settling tank, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010612613.6A CN113862045A (en) | 2020-06-30 | 2020-06-30 | Pyrolysis gas segmentation processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010612613.6A CN113862045A (en) | 2020-06-30 | 2020-06-30 | Pyrolysis gas segmentation processing system |
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| CN113862045A true CN113862045A (en) | 2021-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010612613.6A Pending CN113862045A (en) | 2020-06-30 | 2020-06-30 | Pyrolysis gas segmentation processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115300941A (en) * | 2022-08-17 | 2022-11-08 | 青岛科技大学 | Method for separating heavy oil and light oil from oil-water mixture |
-
2020
- 2020-06-30 CN CN202010612613.6A patent/CN113862045A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115300941A (en) * | 2022-08-17 | 2022-11-08 | 青岛科技大学 | Method for separating heavy oil and light oil from oil-water mixture |
| CN115300941B (en) * | 2022-08-17 | 2023-11-17 | 青岛科技大学 | Method for separating heavy oil and light oil from oil-water mixture |
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