CN215667857U - Device for innocent treatment of high-sulfur petroleum coke - Google Patents
Device for innocent treatment of high-sulfur petroleum coke Download PDFInfo
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- CN215667857U CN215667857U CN202122245113.6U CN202122245113U CN215667857U CN 215667857 U CN215667857 U CN 215667857U CN 202122245113 U CN202122245113 U CN 202122245113U CN 215667857 U CN215667857 U CN 215667857U
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Abstract
The utility model discloses a device for harmlessly treating high-sulfur petroleum coke, which comprises a petroleum coke slurry preparation system, a gasification and primary purification system and a black water treatment system, wherein the petroleum coke slurry preparation system, the gasification and primary purification system and the black water treatment system are connected through pipelines, and compared with the traditional petroleum coke treatment methods such as incineration and mixed combustion gasification, the device has the advantages that high-temperature and high-pressure gasification reaction can be carried out on fluid petroleum coke and pure oxygen structurally, synthesis gas mainly containing carbon monoxide and hydrogen is efficiently prepared for downstream use, no harmful gas, solid and liquid are discharged in the gasification process, the conversion efficiency of the petroleum coke is improved, and the high-sulfur petroleum coke is efficiently, reasonably and environmentally-friendly utilized; the operability is strong, the method is suitable for popularization and application, and the environment is protected; the resource utilization rate is high.
Description
Technical Field
The utility model relates to a device for treating petroleum coke, in particular to a device for harmlessly treating high-sulfur petroleum coke, belonging to the field of petrochemical industry.
Background
Petroleum coke is formed in the deep thermal conversion process of residual oil, when the temperature is raised to a certain degree, molecules in raw materials begin to break, so that free radicals are generated, a complex chain reaction occurs, macromolecules break into molecules with smaller relative molecular mass, meanwhile, heavy molecules with larger relative molecular mass and higher carbon-hydrogen ratio are correspondingly generated due to a condensation reaction, and even solid coke is generated. In the process of cracking and decarbonizing residua, a large amount of hydrogen is converted into gas and liquid products, reducing the hydrogen-to-carbon ratio in petroleum coke, while about 30% of sulfur and most metals migrate to the petroleum coke.
With the increase of the delayed coking unit in China, the petroleum coke yield is increased every year, and the petroleum coke yield is 2413.2 ten thousand tons in the nation 1-10 months in 2020. Except that part of high-quality petroleum coke is used for producing industrial raw materials, most of the petroleum coke is used for combustion power generation, the disposal of the high-sulfur petroleum coke is difficult and seriously polluted, the reasonable and efficient disposal of the petroleum coke becomes a difficult problem of each enterprise, and therefore, the development of efficient clean utilization of the high-sulfur petroleum coke becomes a problem which needs to be solved urgently.
At present, some manufacturers carry out the work of producing crude gas by blending and gasifying petroleum coke and coal, different problems occur according to different blending and burning proportions, but the conversion efficiency and the carbon conversion rate of a gasification furnace are reduced due to the properties of poor petroleum coke gasification reaction activity, high ignition point, low ash content, high ash melting point and the like, and meanwhile, equipment is seriously corroded and blocked.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides the device for harmlessly treating the high-sulfur petroleum coke, which has the technical characteristics of no discharge of harmful gas, solid and liquid in the gasification process, improvement of the conversion efficiency of the petroleum coke, realization of efficient, reasonable and environment-friendly utilization of the high-sulfur petroleum coke and the like.
In order to achieve the purpose, the utility model is realized by the following technical scheme:
a device for harmlessly treating high-sulfur petroleum coke comprises a petroleum coke slurry preparation system, a gasification and primary purification system and a black water treatment system, wherein the petroleum coke slurry preparation system, the gasification and primary purification system and the black water treatment system are connected through pipelines;
the petroleum coke slurry preparation system fully mixes and grinds petroleum coke, an additive, water and gasification ash in a mill to prepare petroleum coke slurry, and the petroleum coke slurry is input into a gasification and primary purification system;
the gasification and preliminary purification system comprises reaction equipment and synthesis gas preliminary purification equipment, pure oxygen and petroleum coke slurry are mixed in the reaction equipment under a pressurized non-catalytic condition to carry out partial oxidation reaction to generate crude synthesis gas, the crude synthesis gas enters the synthesis gas preliminary purification equipment to carry out acid gas removal, black water is discharged from the reaction equipment and the synthesis gas preliminary purification equipment, and the black water is sent to a black water treatment system;
the black water treatment system comprises a multi-stage flash tank and a slag-water separation device which are connected in series, wherein the flash tank enables gas components dissolved in black water to be fully volatilized and released, and the slag-water separation device sends ash residues to the petroleum coke slurry preparation system for recycling.
Preferably, the petroleum coke slurry preparation system comprises a petroleum coke bin, a weighing feeder, a mill, a rotary screen, a mill discharge chute pump and an additive tank, wherein the petroleum coke bin, the weighing feeder, the mill, the rotary screen, the mill discharge chute pump and the additive tank are sequentially communicated through pipelines, and the additive tank is connected to the inlet end of the mill through a pipeline with the additive feed pump.
Preferably, the reaction equipment comprises a gasification furnace, the primary synthesis gas purification equipment comprises a primary mixer, a separator, a secondary mixer and a water washing tower, the gasification furnace, the primary mixer, the separator, the secondary mixer and the water washing tower are sequentially communicated through pipelines, and the top of the water washing tower is connected with a pipe network through a pipeline so as to realize that the synthesis gas goes to the pipe network.
Preferably, the mill discharge chute pump is sequentially connected with a petroleum coke chute and a coke slurry feeding pump through pipelines, and the coke slurry feeding pump is connected with a burner of the gasification furnace through a pipeline.
Preferably, the multistage serial flash tanks comprise a high-pressure flash tank, a low-pressure flash tank and a vacuum flash tank which are sequentially communicated through pipelines so as to fully volatilize and release gas components dissolved in the black water and concentrate the black water;
the sediment water splitter includes the clarification tank, there is clarification tank underflow pump clarification tank bottom through the pipe connection, clarification tank underflow pump passes through the pipe connection at the mill entrance point, the clarification tank passes through pipeline and vacuum flash tank bottom intercommunication.
Preferably, the clarifying tank underflow pump is sequentially connected with a filter, a filtrate tank and a filtrate pump through pipelines, and the filtrate pump is connected to the inlet end of the mill through a pipeline.
Preferably, the bottom of the gasification furnace is sequentially connected with a lock hopper and a slag conveyor through pipelines.
Preferably, the upper part of the clarifying tank is connected with a grey water tank, a low-pressure grey water pump, a grey water tank and a high-pressure grey water pump through pipelines, the high-pressure grey water tank is connected to the water washing tower through a pipeline, and the grey water tank is further connected with the high-pressure flash tank through a pipeline.
Preferably, the gasification furnace, the separator and the water washing tower are respectively connected with the high-pressure flash tank through pipelines.
Has the advantages that: different from the traditional petroleum coke treatment methods such as burning and blending burning gasification, the method has the advantages that the high-temperature and high-pressure gasification reaction can be carried out by adopting the fluid petroleum coke and pure oxygen structurally, the synthesis gas mainly containing carbon monoxide and hydrogen is efficiently prepared for downstream use, no harmful gas, solid and liquid are discharged in the gasification process, the conversion efficiency of the petroleum coke is improved, and the high-sulfur petroleum coke is efficiently, reasonably and environmentally-friendly utilized; the operability is strong, the method is suitable for popularization and application, and the environment is protected; the resource utilization rate is high.
Drawings
FIG. 1 is a block diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the drawings attached to the specification, but the present invention is not limited to the following examples.
The utility model belongs to the successful case of efficiently and environmentally utilizing petroleum coke, and the synthesis gas has high effective gas component, high carbon conversion rate and environmental protection.
Fig. 1 shows a specific embodiment of an apparatus for harmless treatment of high-sulfur petroleum coke, which includes a petroleum coke slurry preparation system, a gasification and primary purification system, and a black water treatment system, wherein the petroleum coke slurry preparation system, the gasification and primary purification system, and the black water treatment system are connected by pipelines; the petroleum coke slurry preparation system fully mixes and grinds petroleum coke, an additive, water and gasification ash in a mill to prepare petroleum coke slurry, and the petroleum coke slurry is input into a gasification and primary purification system; the gasification and preliminary purification system comprises reaction equipment and synthesis gas preliminary purification equipment, pure oxygen and petroleum coke slurry are mixed in the reaction equipment under a pressurized non-catalytic condition to carry out partial oxidation reaction to generate crude synthesis gas, the crude synthesis gas enters the synthesis gas preliminary purification equipment to carry out acid gas removal, black water is discharged from the reaction equipment and the synthesis gas preliminary purification equipment, and the black water is sent to a black water treatment system; the black water treatment system comprises a multi-stage flash tank and a slag-water separation device which are connected in series, wherein the flash tank enables gas components dissolved in black water to be fully volatilized and released, and the slag-water separation device sends ash residues to the petroleum coke slurry preparation system for recycling.
Petroleum coke thick liquid preparation system in this application: the petroleum coke slurry is prepared by fully mixing and grinding petroleum coke, an additive, water and gasification ash in a grinding machine, and has the characteristics of good fluidity, strong stability and proper PH value, and the concentration is between 60 and 72 percent, wherein the additive is selected according to the requirement;
specifically, the method comprises the following steps: petroleum coke with the granularity of less than 15mm is fed into a petroleum coke bin, then is metered by a weighing feeder and then enters a mill, an additive which is fed from an additive tank through an additive feeding pump is added into the mill, so that the concentration and the stability of petroleum coke slurry are improved, the viscosity of the petroleum coke slurry is reduced, water for the pulping process of the petroleum coke slurry mainly comes from a clarifying tank and is fed into the mill through a bottom liquid pump of the clarifying tank, the recycling of waste water is considered as much as possible for the pulping water, and gasified grey water, filtrate and process condensate or waste water of other devices can be used. When petroleum coke, water, an additive and gasification ash are made into petroleum coke slurry with certain concentration and particle size distribution by a grinding machine, the petroleum coke slurry overflows out of the grinding machine, large particles with the size of more than 3.5mm are filtered by a drum screen, and then automatically flows to a discharge groove of the grinding machine by means of gravity, and the petroleum coke slurry is pumped into a petroleum coke slurry groove by a discharge groove of the grinding machine and is conveyed into a gasification furnace by a coke slurry feeding pump; the purpose of adding ash into gasified petroleum coke is to reduce the melting point of petroleum coke ash, improve the reaction activity and improve the gasification efficiency.
The following table shows the melting points of petroleum coke ash at different addition rates.
According to the results of the petroleum coke ash melting point analysis, the effect of reducing the ash melting point is large when 5-10% of fine slag is added in the gasification process.
Gasification and preliminary clean system: pure oxygen and petroleum coke slurry are used as raw materials, a gasification furnace (airflow bed reactor) is adopted to carry out partial oxidation reaction under the pressurized non-catalytic condition to generate crude synthesis gas which takes carbon monoxide and hydrogen as effective components and is used as raw material gas of downstream chemical products, the reaction temperature in the gasification furnace is 1400 ℃ and 1550 ℃, the pressure is about 6.5MPa (G), and the chemical reaction rate is relatively high under the high-temperature and high-pressure condition. The synthesis gas passes through the first-stage mixer, the separator, the second-stage mixer and the water washing tower, is subjected to acid gas removal and then is used by a rear system, and the synthesis gas purification device has the effects of high efficiency and energy conservation. Wherein, the first-stage mixer, the separator and the second-stage mixer belong to the conventional equipment in the prior art, and are not described in detail in the application.
A water treatment system: the method adopts three-stage continuous flash, namely a high-pressure flash tank, a low-pressure flash tank and a vacuum flash tank, so that gas components dissolved in black water are fully volatilized and released, the black water is further concentrated, and the method has the characteristics of energy conservation and long-period operation.
The following table shows the analysis of the components of the synthesis gas and the ash water after petroleum coke gasification, and the data in the table shows that the petroleum coke gasification efficiency is better, and the ash slag and the ash water have no pollution to the environment, thereby belonging to an effective method for clean and efficient utilization of petroleum coke.
In a preferred embodiment mode, the petroleum coke slurry preparation system comprises a petroleum coke bin, a weighing feeder, a mill, a rotary screen, a mill discharge chute pump and an additive tank, wherein the petroleum coke bin, the weighing feeder, the mill, the rotary screen, the mill discharge chute pump and the additive tank are sequentially communicated through pipelines, and the additive tank is connected to the inlet end of the mill through a pipeline with the additive feed pump.
In a preferred embodiment, the reaction equipment comprises a gasification furnace, the synthesis gas primary purification equipment comprises a primary mixer, a separator, a secondary mixer and a water washing tower, the gasification furnace, the primary mixer, the separator, the secondary mixer and the water washing tower are sequentially communicated through pipelines, and the top of the water washing tower is connected with a pipe network through a pipeline so as to realize that the synthesis gas goes to the pipe network.
In a preferred embodiment mode, the mill discharge chute pump is sequentially connected with a petroleum coke chute and a coke slurry feeding pump through pipelines, and the coke slurry feeding pump is connected with a burner of the gasification furnace through a pipeline.
In a preferred embodiment mode, the multistage serial flash tanks comprise a high-pressure flash tank, a low-pressure flash tank and a vacuum flash tank which are sequentially communicated through pipelines so as to fully volatilize and release gas components dissolved in the black water and concentrate the black water;
the sediment water splitter includes the clarification tank, there is clarification tank underflow pump clarification tank bottom through the pipe connection, clarification tank underflow pump passes through the pipe connection at the mill entrance point, the clarification tank passes through pipeline and vacuum flash tank bottom intercommunication.
In a preferred embodiment mode, the clarifying tank underflow pump is sequentially connected with a filter, a filtrate tank and a filtrate pump through pipelines, and the filtrate pump is connected to the inlet end of the mill through a pipeline.
In a preferred embodiment mode, the bottom of the gasification furnace is sequentially connected with a lock hopper and a slag conveyor through pipelines.
In a preferred embodiment mode, the upper part of the clarifying tank is connected with an ash water tank, a low-pressure ash water pump, an ash water tank and a high-pressure ash water pump through pipelines, the high-pressure ash water tank is connected to the water washing tower through pipelines, and the ash water tank is further connected with the high-pressure flash tank through a pipeline.
In a preferred embodiment, the vaporizing furnace, the separator and the water washing tower are respectively connected with the high-pressure flash drum through pipelines.
Finally, it should be noted that the present invention is not limited to the above embodiments, and many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the utility model.
Claims (9)
1. The utility model provides a device of innocent treatment high sulfur petroleum coke which characterized in that: the system comprises a petroleum coke slurry preparation system, a gasification and primary purification system and a black water treatment system, wherein the petroleum coke slurry preparation system, the gasification and primary purification system and the black water treatment system are connected through pipelines;
the petroleum coke slurry preparation system fully mixes and grinds petroleum coke, an additive, water and gasification ash in a mill to prepare petroleum coke slurry, and the petroleum coke slurry is input into a gasification and primary purification system;
the gasification and preliminary purification system comprises reaction equipment and synthesis gas preliminary purification equipment, pure oxygen and petroleum coke slurry are mixed in the reaction equipment under a pressurized non-catalytic condition to carry out partial oxidation reaction to generate crude synthesis gas, the crude synthesis gas enters the synthesis gas preliminary purification equipment to carry out acid gas removal, black water is discharged from the reaction equipment and the synthesis gas preliminary purification equipment, and the black water is sent to a black water treatment system;
the black water treatment system comprises a multi-stage flash tank and a slag-water separation device which are connected in series, wherein the flash tank enables gas components dissolved in black water to be fully volatilized and released, and the slag-water separation device sends ash residues to the petroleum coke slurry preparation system for recycling.
2. The apparatus for harmless treatment of high sulfur petroleum coke according to claim 1, wherein: the petroleum coke slurry preparation system comprises a petroleum coke bin, a weighing feeder, a mill, a rotary screen, a mill discharge chute pump and an additive tank, wherein the petroleum coke bin, the weighing feeder, the mill, the rotary screen, the mill discharge chute pump and the additive tank pump are sequentially communicated through pipelines, and the additive tank is connected to the inlet end of the mill through a pipeline with the additive feed pump.
3. The apparatus for harmless treatment of high sulfur petroleum coke according to claim 2, wherein: the reaction equipment comprises a gasification furnace, the primary synthesis gas purification equipment comprises a primary mixer, a separator, a secondary mixer and a water washing tower, the gasification furnace, the primary mixer, the separator, the secondary mixer and the water washing tower are sequentially communicated through pipelines, and the top of the water washing tower is connected with a pipe network through a pipeline so as to realize that synthesis gas goes to the pipe network.
4. The apparatus for harmless treatment of high sulfur petroleum coke according to claim 3, wherein: the mill discharge chute pump is sequentially connected with a petroleum coke chute and a coke slurry feeding pump through pipelines, and the coke slurry feeding pump is connected with a burner of the gasification furnace through a pipeline.
5. The apparatus for harmless treatment of high sulfur petroleum coke according to claim 3 or 4, wherein: the multistage serial flash tanks comprise a high-pressure flash tank, a low-pressure flash tank and a vacuum flash tank which are sequentially communicated through pipelines so as to fully volatilize and release gas components dissolved in the black water and concentrate the black water;
the sediment water splitter includes the clarification tank, there is clarification tank underflow pump clarification tank bottom through the pipe connection, clarification tank underflow pump passes through the pipe connection at the mill entrance point, the clarification tank passes through pipeline and vacuum flash tank bottom intercommunication.
6. The apparatus for harmless treatment of high sulfur petroleum coke according to claim 5, wherein: the clarifying tank underflow pump is sequentially connected with a filter, a filtrate tank and a filtrate pump through pipelines, and the filtrate pump is connected to the inlet end of the mill through a pipeline.
7. The apparatus for harmless treatment of high sulfur petroleum coke according to claim 3, wherein: the bottom of the gasification furnace is sequentially connected with a lock hopper and a slag conveyor through pipelines.
8. The apparatus for harmless treatment of high sulfur petroleum coke according to claim 5, wherein: the upper portion of the clarifying tank is connected with a grey water tank, a low-pressure grey water pump, a grey water tank and a high-pressure grey water pump through pipelines, the high-pressure grey water tank is connected to the water washing tower through pipelines, and the grey water tank is further connected with the high-pressure flash evaporation tank through pipelines.
9. The apparatus for harmless treatment of high sulfur petroleum coke according to claim 6 or 8, wherein: the gasification furnace, the separator and the water washing tower are respectively connected with the high-pressure flash tank through pipelines.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122245113.6U CN215667857U (en) | 2021-09-16 | 2021-09-16 | Device for innocent treatment of high-sulfur petroleum coke |
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| CN202122245113.6U CN215667857U (en) | 2021-09-16 | 2021-09-16 | Device for innocent treatment of high-sulfur petroleum coke |
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