CN116875337A - Gasification system and process method for cooperatively treating heavy oil integrated waste liquid - Google Patents
Gasification system and process method for cooperatively treating heavy oil integrated waste liquid Download PDFInfo
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- CN116875337A CN116875337A CN202310268269.7A CN202310268269A CN116875337A CN 116875337 A CN116875337 A CN 116875337A CN 202310268269 A CN202310268269 A CN 202310268269A CN 116875337 A CN116875337 A CN 116875337A
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- 239000002699 waste material Substances 0.000 title claims abstract description 117
- 239000007788 liquid Substances 0.000 title claims abstract description 116
- 239000000295 fuel oil Substances 0.000 title claims abstract description 73
- 238000002309 gasification Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 43
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 47
- 239000001301 oxygen Substances 0.000 claims description 47
- 229910052760 oxygen Inorganic materials 0.000 claims description 47
- 239000007789 gas Substances 0.000 claims description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 15
- 238000003786 synthesis reaction Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 12
- 239000003921 oil Substances 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 11
- 239000010866 blackwater Substances 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 claims description 7
- 230000008020 evaporation Effects 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 6
- 238000004939 coking Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical group O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000011278 co-treatment Methods 0.000 claims 4
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 claims 2
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000003245 coal Substances 0.000 description 13
- 239000002002 slurry Substances 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 239000002351 wastewater Substances 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 7
- 239000010815 organic waste Substances 0.000 description 6
- 239000010426 asphalt Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a gasification system and a process method for the cooperative treatment of heavy oil integrated waste liquid, according to the characteristics of a heavy oil gasification technology, different types of waste liquid can be respectively considered in terms of treatment schemes, the treatment pertinence of the waste liquid is stronger, in addition, the treatment of the waste liquid utilizes the existing steam channel and the heavy oil channel, and the feeding scheme of the waste liquid can be flexibly switched according to the actual waste liquid treatment requirements; according to the invention, on the basis of a heavy oil gasification flow, the characteristics of different waste liquids are analyzed, oily waste liquid with good intersolubility with heavy oil is mixed with the heavy oil and then is sent into a burner heavy oil channel after being pressurized by a heavy oil pump, other waste liquids (aqueous waste liquid) with poor intersolubility are directly pressurized and then are sent into a burner, once the aqueous waste liquid is interrupted, steam can be introduced into the burner channel through interlocking to protect the burner channel, and on the basis of treating various waste liquids, the consumption of high-grade ultrahigh-pressure steam is saved, and the device is enabled to operate more flexibly and stably.
Description
Technical Field
The invention relates to a gasification system and a process method for cooperatively treating heavy oil integrated waste liquid.
Background
The method is one of the directions of continuous effort and exploration in the oil refining industry, and is aimed at the resource characteristics of rich coal, lean oil and less gas in China, and the method efficiently and reasonably utilizes heavy oil products such as residual oil and the like to produce more high-value products. The current secondary processing technology of heavy oil products mainly comprises delayed coking and hydrotreating. With the increasing strictness of environmental regulations, the technical route of delayed coking has been difficult to be qualified for treatment of oil residues and the like. Under the large trend of heavy and poor quality of crude oil, the heavy metal content in residual oil is higher and higher, and the hydrotreating route is limited to the heavy metal content. Along with the continuous improvement of the national environmental protection requirement and the optimization and adjustment of the industrial structure, the heavy oil gasification technology has become an important way for utilizing heavy oil. Because the process characteristics of the oil refining and chemical industry devices determine, a certain amount of high-concentration COD wastewater and waste liquid can be generated, the standard emission is difficult to reach by using a simple physicochemical or biochemical treatment method, the multistage treatment method is generally required to be combined, and the treatment cost is higher. Therefore, on the premise of solving the problem of heavy oil gasification treatment, the waste liquid is reasonably mixed and burned, so that the method has obvious economic and environmental benefits, and can improve the comprehensive competitive advantage of the heavy oil gasification technology.
Chinese patent CN105112104B provides a multichannel nozzle for a multi-slurry gasification reactor, which comprises a grade I waste liquid pipeline, a grade II waste liquid pipeline, a grade I oxygen supply pipeline, a slurry pipeline, a grade II oxygen supply pipeline and a cooling system, wherein the grade I waste liquid pipeline, the grade II waste liquid pipeline, the grade I oxygen supply pipeline, the slurry pipeline, the grade II oxygen supply pipeline and the cooling system are sequentially arranged from inside to outside in a longitudinal axis overlapping mode. The main implementation process is as follows: firstly, one or more slurries selected from slurries and hydrocarbon-containing slurries are fed into a slurry pipeline through a slurry inlet, organic wastewater is fed into a waste liquid pipeline through a waste liquid inlet, the oxidant is simultaneously fed into a grade I oxygen-feeding pipeline through a grade I oxygen-feeding inlet and a grade II oxygen-feeding inlet respectively, the slurries, the organic waste liquid and the oxidant from the grade I oxygen-feeding pipeline are fully mixed and atomized in a premixing area, the atomized matters are secondarily atomized with the oxidant from the grade II oxygen-feeding pipeline, then are sprayed out from a multi-channel nozzle, and then enter a gasification furnace to perform partial oxidation reaction under the conditions of the temperature of 1100-1650 ℃ and the pressure of 0.1-20 MPa, and CO are produced 2 And H 2 Synthesis gas as the main component. The design core of the multi-channel nozzle is that a waste liquid channel is added on the basis of a conventional nozzle, the high-efficiency treatment of hydrocarbon slurry and various waste liquids is realized through a reasonable design of the nozzle structure, and on the basis of generating synthesis gas, the environmental pollution of organic waste liquid is avoided, and water resources are saved; however, the existing burner structure becomes complicated due to the addition of the waste liquid channel, the size is larger, the processing difficulty is large, in addition, waste liquid is used as an unstable raw material, when the feeding of waste liquid is interrupted, other feeding needs to be added in the actual operation, and the waste liquid channel is ensured not to be empty so as to prevent the risk of leakage of high-temperature and high-pressure synthesis gas in the gasifier, so that the scheme provided by the patent technology has poor flexibility in the actual operation.
The patent application CN 109135854A provides a coal water slurry prepared by using waste activated carbon, organic waste liquid and coal and a preparation method thereof, and the core thought of the patent is as follows: aiming at the characteristics of complex components, high COD value, difficult standard emission due to simple physical and chemical treatment, generally combination of a multi-stage treatment method and high treatment cost of waste activated carbon, which are used for highly enriching pollutants after the waste activated carbon is adsorbed and saturated, the method fully utilizes the characteristic of high fixed carbon content of the waste activated carbon to replace part of coal to be used as coal gasification raw materials, and provides a method for preparing coal water slurry by mixing the waste activated carbon, the organic waste liquid and coal dust and adding a proper amount of additives. Although the organic waste liquid can be treated, due to the complexity and the variability of the components of the organic waste liquid, the explosion-proof grade of a coal grinding pulping factory building can be improved, the investment of projects is increased, and the economical efficiency of the scheme is deteriorated. In addition, due to the complex components of the waste liquid, certain components may exist to influence the slurry forming performance of the coal slurry, influence the gasification reaction and risk blockage of pipelines and equipment.
The patent application CN 107189820A discloses a pulverized coal mixed combustion high-concentration organic wastewater composite gasification burner and a process method, wherein a burner ignition gun is independently arranged, pulverized coal feeding and wastewater mixed combustion of the burner are respectively arranged as independent channels, ignition and start-up purge gas are the same channel, organic wastewater oxygen and start-up oxygen are uniform channels, the pulverized coal channels are arranged on gasification furnace structures such as an outer ring of the burner, and the like to improve the organic wastewater mixed combustion process in pulverized coal gasification. However, in order to realize flexible treatment of pulverized coal and mixed combustion wastewater, the pulverized coal and wastewater channels are set to be independent channels, the structure of the modified burner is complex, the size is larger, the processing difficulty is large, in addition, since waste liquid, the ignition start-up purge gas and oxygen are in the same channel, the feeding operation cannot be performed in the ignition start-up stage, the mixed combustion of wastewater can be realized only after the operation of the gasifier is stable, the mixed combustion limiting conditions are more, the operation of the device is influenced after the mixed combustion of the waste liquid, and the related parameters are required to be timely adjusted. In addition, similar to patent CN105112104B, the flexibility of operation is poor, and when the waste feed is interrupted, additional feed needs to be added to ensure that the synthesis gas does not back-flow from the waste channel.
Disclosure of Invention
Aiming at the current state of the art, the invention provides a gasification system and a process method for the collaborative treatment of heavy oil integrated waste liquid, which determine the blending burning modes of different waste liquids by analyzing the characteristics of each waste liquid, save the consumption of high-grade ultrahigh-pressure steam on the basis of treating various waste liquids, and ensure the flexible and stable operation of the device.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a gasification system of integrated waste liquid collaborative treatment of heavy oil, includes gasifier and connects the nozzle in gasifier top entrance, the nozzle is provided with ignition passageway, central oxygen passageway, heavy oil passageway, intermediate steam passageway, annular gap oxygen passageway, outside steam passageway that radially arrange in proper order outward along the center, gasification system still includes
The first channel is communicated with the ignition channel and is used for conveying the aqueous waste liquid for the burner;
the second channel is communicated with the central oxygen channel and is used for conveying preheated oxygen to the burner; is communicated with the annular gap oxygen channel through a sub-channel;
the third channel is communicated with the heavy oil channel and is used for conveying mixed liquid of heavy oil and oily waste liquid for the burner;
and the fourth channel is used for conveying superheated steam, is communicated with the first channel through the first branch channel, is communicated with the second channel through the second branch channel, is communicated with the middle steam channel through the third branch channel and is communicated with the outer steam channel through the fourth branch channel.
Preferably, the second channel is provided with a first mixer, and the outlet end of the second branch channel is communicated with the first mixer, so as to mix the preheated oxygen with the superheated steam.
Preferably, the third channel is provided with a second mixer for mixing the heavy oil and the oily waste liquid conveyed upstream thereof.
Preferably, a first feeding pump for pressurizing the mixed liquid of the heavy oil and the oily waste liquid is arranged on the third channel, and the first feeding pump is positioned at the downstream of the second mixer.
Preferably, a second feeding pump for pressurizing the aqueous waste liquid is arranged on the first channel.
Preferably, the outermost side of the burner is provided with a cooling water system for cooling the burner to protect the burner, and the cooling water system adopts a jacket type or coil pipe type structure.
A process method for cooperatively treating heavy oil integrated waste liquid comprises the following steps:
the preheated oxygen is mixed with superheated steam through a first mixer and then distributed to a central oxygen channel and an annular oxygen channel of the burner according to a certain proportion;
the superheated steam is distributed to the middle steam channel and the outer steam channel of the burner according to a certain proportion in two ways except that one part of the superheated steam is mixed with oxygen;
the heavy oil and oily waste liquid are mixed by a second mixer and then enter a first feed pump, and the mixture is pressurized by the first feed pump and then sent into a heavy oil channel of a burner;
the water-based waste liquid is fed into an ignition channel of the burner after being pressurized by a second feeding pump, and once the water-based waste liquid is interrupted, the burner is protected by taking steam from a first branch channel as a substitute medium;
after the raw materials of all channels enter the gasification furnace, the raw materials react in the gasification furnace to generate CO and H 2 And (3) the synthesis gas serving as a main component is cooled and washed and then is sent to a downstream unit, and black water generated in the cooling and washing process is sent to a black water flash evaporation system for treatment. The synthesis gas cooling can adopt a waste boiler process to recycle the heat of the synthesis gas, can also adopt a simple and efficient chilling process, and can also adopt a waste boiler and chilling combined cooling process; the black water flash evaporation system is a black water heat recovery and recycling system and can be a two-stage, three-stage or four-stage flash evaporation system.
In the invention, the gasification furnace is a place where heavy oil reacts with a gasifying agent to generate synthesis gas, the gasification pressure is 0.1-8.5 MPaG, and the gasification temperature is 1100-1500 ℃; the gasifying agent is pure oxygen and high-pressure steam;
the heavy oil is one or more of atmospheric residuum, vacuum residuum, hydrogenated tail oil, coking tail oil and ethylene tar produced by various devices of a refinery; the gasification furnace is a cold wall type or a hot wall type, the cold wall type is a water-cooled wall type, and the hot wall type is a refractory material;
the oily waste liquid is waste liquid which can be completely mutually dissolved with the heavy oil raw material, such as phenol tar, bisphenol A tar and the like;
the aqueous waste liquid is a waste liquid which is dissolved with organic matters in water and can not be completely mutually dissolved with heavy oil, such as methanol, ethanol, toluene and the like.
Preferably, the distribution ratio of the fluid in the central oxygen channel and the annular gap oxygen channel is 1:4-1:10 according to the volume flowmeter.
Preferably, the distribution ratio of the fluid in the middle steam channel and the fluid in the outer steam channel is 1:1-1:5 according to the volume flowmeter.
Compared with the prior art, the invention has the advantages that: according to the gasification system and the process method provided by the invention, different types of waste liquid can be respectively considered for treatment schemes according to the characteristics of the heavy oil gasification technology, so that the treatment pertinence of the waste liquid is stronger, in addition, the treatment of the waste liquid utilizes the existing steam channel and the heavy oil channel, and the feeding scheme of the waste liquid can be flexibly switched according to the actual waste liquid treatment requirements, so that the method has higher operability;
the invention can determine the mode of mixing and burning different waste liquid by analyzing the characteristics of each waste liquid: on the basis of a heavy oil gasification flow, the characteristics of different waste liquids are analyzed, oily waste liquid with good intersolubility with heavy oil is mixed with the heavy oil and then is sent into a burner heavy oil channel after being pressurized by a heavy oil pump, other waste liquids (aqueous waste liquids) with poor intersolubility are directly pressurized and then are sent into a burner, once the aqueous waste liquids are interrupted, steam can be led in through interlocking to protect the burner channel, and on the basis of treating various waste liquids, the consumption of high-grade ultrahigh-pressure steam is saved, and the device is enabled to operate more flexibly and stably.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1, the gasification system for co-processing heavy oil integrated waste liquid in this embodiment includes a gasification furnace 6 and a burner 5 connected to an inlet at the top of the gasification furnace 6, the burner 5 is provided with an ignition channel, a central oxygen channel, a heavy oil channel, an intermediate steam channel, an annular oxygen channel and an outer steam channel which are sequentially arranged radially from the center to the outside, and the gasification system further includes:
the first channel 01 is communicated with the ignition channel and is used for conveying the aqueous waste liquid 101 for the burner;
a second channel 02, which is communicated with the central oxygen channel and is used for conveying preheated oxygen 102 to the burner; is communicated with the annular gap oxygen channel through a sub-channel 021;
a third channel 03 communicated with the heavy oil channel and used for conveying the mixed liquid of the heavy oil 103 and the oily waste liquid 104 to the burner;
a fourth channel 04 for delivering superheated steam 105, which communicates with the first channel 01 via a first branch channel 041, with the second channel 02 via a second branch channel 042, with the intermediate steam channel via a third branch channel 043, and with the outer steam channel via a fourth branch channel 044.
The second channel 02 is provided with a first mixer 2, and the outlet end of the second branch channel 042 is communicated with the first mixer 2, so as to mix the preheated oxygen 102 with the superheated steam 105. The third channel 03 is provided with a second mixer 3 for mixing the heavy oil 103 delivered upstream thereof with the oily waste liquid 104.
The third channel 03 is provided with a first feed pump 4 for pressurizing the mixture of the heavy oil 103 and the oily waste liquid 104, and the first feed pump 4 is located downstream of the second mixer 3. The first channel 01 is provided with a second feed pump 1 for pressurizing the aqueous waste liquid 101.
The outermost side of the burner 5 is provided with a cooling water system for cooling the burner 5 to protect the burner 5, and the cooling water system adopts a jacket type or coil pipe type structure.
The process method for cooperatively treating the heavy oil integrated waste liquid in the embodiment comprises the following steps of:
the preheated oxygen 102 is mixed with the superheated steam 105 by the first mixer 2 and then distributed to a central oxygen channel and an annular oxygen channel of the burner 5 according to a certain proportion;
the superheated steam 105 is distributed to the middle steam channel and the outer steam channel of the burner 5 in two paths according to a certain proportion except that one part of the superheated steam is mixed with the oxygen 102;
the heavy oil 103 and oily waste liquid 104 are mixed by the second mixer 3 and then enter the first feed pump 4, and after being pressurized by the first feed pump 4, the mixture is sent into a heavy oil channel of the burner 5;
the aqueous waste liquid 101 is fed into an ignition channel of the burner 5 after being pressurized by the second feed pump 1, and once the aqueous waste liquid 101 is interrupted, the burner 5 is protected by taking steam from the first branch channel 041 as a substitute medium;
after the raw materials of each channel enter the gasification furnace, the raw materials react in the gasification furnace 6 to generate CO and H 2 And (3) the synthesis gas serving as a main component is cooled and washed and then is sent to a downstream unit, and black water generated in the cooling and washing process is sent to a black water flash evaporation system for treatment. The synthesis gas cooling can adopt a waste boiler process to recycle the heat of the synthesis gas, can also adopt a simple and efficient chilling process, and can also adopt a waste boiler and chilling combined cooling process; the black water flash evaporation system is a black water heat recovery and recycling system and can be a two-stage, three-stage or four-stage flash evaporation system.
In the embodiment, the gasification furnace 6 is a place where heavy oil reacts with a gasifying agent to generate synthesis gas, the gasification pressure is 0.1-8.5 MPaG, and the gasification temperature is 1100-1500 ℃; the gasifying agent is pure oxygen and high-pressure steam;
the heavy oil is one or more of atmospheric residuum, vacuum residuum, hydrogenated tail oil, coking tail oil and ethylene tar produced by various devices in a refinery; the gasification furnace is a cold wall type or a hot wall type, the cold wall type is a water-cooled wall type, and the hot wall type is a refractory material; the oily waste liquid is waste liquid which can be completely mutually dissolved with the heavy oil raw material, such as phenol tar, bisphenol A tar and the like; the aqueous waste liquid is a waste liquid in which organic matters are dissolved in water and are not completely miscible with heavy oil, such as methanol, ethanol, toluene, etc.
According to the volume flowmeter, the distribution ratio of the fluid in the central oxygen channel and the annular gap oxygen channel is 1:4-1:10. According to the volume flowmeter, the distribution ratio of the fluid in the middle steam channel to the fluid in the outer steam channel is 1:1-1:5.
The above-described gasification method will be described by taking a gasification project of a certain deoiled asphalt treatment waste liquid as an example:
the reaction pressure of the gasifier 6 is 6.5MPaG, and the reaction temperature is 1300 ℃. After 49t/h deoiled asphalt is heated to 230 ℃, the deoiled asphalt is fully mixed with oily waste liquid with the operating temperature of 150 ℃ and the flow rate of 3.5t/h in a second mixer 3, the oily waste liquid is pressurized to 7.5MPaG by a first feed pump 4 and then is sent into a burner heavy oil channel, oxygen (50 t/h) sent by an air separation device is preheated to 200 ℃, and then is mixed with superheated steam with the temperature of 12.5t/h and 350 ℃ in an oxygen steam first mixer 2 according to the following formula 1:4 to the central oxygen channel and the annular oxygen channel. The steam volumes of the middle steam channel and the outer steam channel are 3t/h and 8t/h respectively, and the water-based waste liquid with the water-based waste liquid of 3.4t/h is mixed with the outer steam and then enters the burner 5.
The carbon conversion of the gasification furnace 6 is 99%, and the effective gas yield of the single-furnace crude synthesis gas is 13.6 ten thousand Nm 3 And/h, the effective gas proportion is 88%. Compared with the method for only treating deoiled asphalt, the method can treat oily waste liquid and aqueous waste liquid for 55200t all the year round, saves the steam consumption by about 24000t, and has very good environmental protection and economic benefits.
Claims (10)
1. The utility model provides a gasification system of integrated waste liquid collaborative treatment of heavy oil, includes gasifier and connects the nozzle in gasifier top entrance, its characterized in that: the burner is provided with an ignition channel, a central oxygen channel, a heavy oil channel, an intermediate steam channel, an annular oxygen channel and an outer steam channel which are sequentially arranged from the center to the outside along the radial direction, and the gasification system further comprises
The first channel is communicated with the ignition channel and is used for conveying the aqueous waste liquid for the burner;
the second channel is communicated with the central oxygen channel and is used for conveying preheated oxygen to the burner; is communicated with the annular gap oxygen channel through a sub-channel;
the third channel is communicated with the heavy oil channel and is used for conveying mixed liquid of heavy oil and oily waste liquid for the burner;
and the fourth channel is used for conveying superheated steam, is communicated with the first channel through the first branch channel, is communicated with the second channel through the second branch channel, is communicated with the middle steam channel through the third branch channel and is communicated with the outer steam channel through the fourth branch channel.
2. The gasification system for the co-treatment of heavy oil integrated waste liquid according to claim 1, wherein: the second channel is provided with a first mixer, and the outlet end of the second branch channel is communicated with the first mixer and is used for mixing the preheated oxygen with the superheated steam.
3. The gasification system for the co-treatment of heavy oil integrated waste liquid according to claim 2, wherein: and the third channel is provided with a second mixer for mixing the heavy oil and the oily waste liquid which are conveyed from the upstream of the second mixer.
4. A gasification system for the co-processing of heavy oil integrated waste streams according to claim 3, characterized in that: the third channel is provided with a first feeding pump for pressurizing the mixed liquid of the heavy oil and the oily waste liquid, and the first feeding pump is positioned at the downstream of the second mixer.
5. The gasification system for the co-treatment of heavy oil integrated waste liquid according to claim 1 or 2 or 3 or 4, wherein: the first channel is provided with a second feeding pump for pressurizing the aqueous waste liquid.
6. The gasification system for the co-treatment of heavy oil integrated waste liquid according to claim 1 or 2 or 3 or 4, wherein: the cooling water system for cooling the burner to protect the burner is arranged at the outermost side of the burner, and the cooling water system adopts a jacket type or coil pipe type structure.
7. A process method for cooperatively treating heavy oil integrated waste liquid is characterized by comprising the following steps:
the preheated oxygen is mixed with superheated steam through a first mixer and then distributed to a central oxygen channel and an annular oxygen channel of the burner according to a certain proportion;
the superheated steam is distributed to the middle steam channel and the outer steam channel of the burner according to a certain proportion in two ways except that one part of the superheated steam is mixed with oxygen;
the heavy oil and oily waste liquid are mixed by a second mixer and then enter a first feed pump, and the mixture is pressurized by the first feed pump and then sent into a heavy oil channel of a burner;
the water-based waste liquid is fed into an ignition channel of the burner after being pressurized by a second feeding pump, and once the water-based waste liquid is interrupted, the burner is protected by taking steam from a first branch channel as a substitute medium;
after the raw materials of all channels enter the gasification furnace, the raw materials react in the gasification furnace to generate CO and H 2 And (3) the synthesis gas serving as a main component is cooled and washed and then is sent to a downstream unit, and black water generated in the cooling and washing process is sent to a black water flash evaporation system for treatment.
8. The process for the collaborative treatment of the heavy oil integrated waste liquid according to claim 7, which is characterized in that: the gasification furnace is used for generating synthesis gas by reacting heavy oil with a gasifying agent, the gasification pressure is 0.1-8.5 MPaG, and the gasification temperature is 1100-1500 ℃; the gasifying agent is pure oxygen and high-pressure steam;
the heavy oil is one or more of atmospheric residuum, vacuum residuum, hydrogenated tail oil, coking tail oil and ethylene tar produced by various devices of a refinery; the gasification furnace is cold wall type or hot wall type. The cold wall type is a water-cooled wall type, and the hot wall type is a refractory material;
the oily waste liquid is waste liquid which can be completely mutually dissolved with the heavy oil raw material and is at least one of phenol tar, bisphenol A tar and isopropylbenzene;
the water-based waste liquid is a waste liquid which is soluble in water and is not completely mutually soluble with heavy oil, and is at least one of methanol, ethanol and toluene, and the COD is 3500-30000 mg/L.
9. The process for the collaborative treatment of the heavy oil integrated waste liquid according to claim 7, which is characterized in that: according to the volume flowmeter, the distribution ratio of the fluid in the central oxygen channel and the annular gap oxygen channel is 1:4-1:10.
10. The process for the collaborative treatment of the heavy oil integrated waste liquid according to claim 7, which is characterized in that: according to the volume flowmeter, the distribution ratio of the fluid in the middle steam channel to the fluid in the outer steam channel is 1:1-1:5.
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