A system for shortening the start-up time of an import gasifier
By optimizing the gasifier system pipelines and valve control, the problem of long start-up time for Shell heavy oil gasifiers was solved, enabling rapid start-up and efficient utilization of fuel gas and air, thereby increasing product gas production.
Patent Information
- Application Number
- CN202210068722.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-01-20
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2042-01-20
AI Technical Summary
In the existing technology, Shell heavy oil gasifiers experience feeding failures or tripping during start-up, resulting in long start-up times and high fuel gas and air losses. There is an urgent need to shorten start-up time and improve hot standby and secondary start-up efficiency.
By optimizing the gasifier system pipeline connections and valve control, including the combined design of the gasifier, carbon black separator, scrubbing tower, spray water pump, etc., rapid pressurization and cooling can be achieved, shortening the start-up time.
The operation time is reduced to 2 hours, gas and air consumption is reduced, and product gas production is increased, which has broad market application prospects.
Smart Images
Figure CN114456847B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a system, more specifically, to a system for shortening the technical start-up time of an imported gasifier, belonging to the field of petrochemical industry. BACKGROUND
[0002] When the Shell heavy oil gasifier fails to feed or the start-up process jumps, the E200 logic system will automatically execute GSD parking and prepare for the next stage as needed. Through technical summary of the start-up stage, it is found that the design of the burner and the refractory material can meet the requirements of continuous start-up. According to the Shell logic control and PID design, after the gasifier fails to feed or the start-up process jumps, it takes 6-10 hours to enter the start-up stage again, the start-up time is long, and the fuel gas and air loss during the secondary start-up is high. Therefore, it is urgent to shorten the time from the jump to the start-up stage through technical demonstration and improvement, greatly improve the efficiency of the hot standby and the secondary start-up, and greatly reduce the loss of fuel gas and air during the secondary start-up. SUMMARY
[0003] In order to solve the above technical problems, the present application provides a system for shortening the technical start-up time of an imported gasifier, which has the technical characteristics of shortening the start-up time of oil residue hydrogen production gasification, simple structure and convenient operation.
[0004] In order to achieve the above purpose, the present application is realized by the following technical scheme:
[0005] A system for shortening the technical start-up time of an imported gasifier, comprising a gasifier, a No. 2 pipeline connected to the middle of the gasifier, a carbon black separator connected to the No. 2 pipeline, a washing tower connected to the middle of the carbon black separator through a No. 3 pipeline, a No. 1 pipeline connected to the top end of the gasifier, a punch pipeline connected to the No. 1 pipeline, the punch pipeline connected to the No. 3 pipeline, a No. 4 pipeline connected to the upper end of the washing tower, the No. 4 pipeline connected to the upper end of the carbon black quenching pipe, further comprising a washing water pump connected to washing liquid, the washing water pump connected to the upper end of the washing tower through a No. 5 pipeline, the No. 5 pipeline divided into a No. 6 pipeline, the No. 6 pipeline connected to the lower end of the gasifier, further comprising a spray water pump b connected to the lower end of the carbon black quenching pipe through a No. 7 pipeline, the carbon black quenching pipe connected to a No. 8 pipeline at the top end, the No. 8 pipeline connected to the middle of the gasifier, the No. 8 pipeline divided into a No. 9 pipeline, the No. 9 pipeline connected to an injector, the injector connected to a chimney through a pipeline.
[0006] Preferably, the fourth pipeline is divided into a plurality of sub-fourth pipelines, the sub-fourth pipelines extend into the carbon black quenching pipe from top to bottom, and the sub-fourth pipelines in the carbon black quenching pipe are all connected with spray heads; the seventh pipeline is divided into a plurality of sub-seventh pipelines, the sub-seventh pipelines extend into the carbon black quenching pipe from top to bottom, and the sub-seventh pipelines in the carbon black quenching pipe are all connected with spray heads.
[0007] Preferably, the first pipeline at the top end of the gasifier is connected with a gasifier post-pressurization valve and a gasifier pre-pressurization valve, and the first pipeline between the gasifier post-pressurization valve and the gasifier pre-pressurization valve is connected with an external pipeline provided with a gasifier pressurization vent valve.
[0008] Preferably, the punch pipeline comprises a separator pre-pressurization valve and a separator post-pressurization valve connected to the first pipeline, a pipeline between the separator pre-pressurization valve and the separator post-pressurization valve is provided with a separator pressurization vent valve, a bypass pipeline is connected between the upper end of the separator pre-pressurization valve and the lower end of the separator post-pressurization valve, and the bypass pipeline is connected with a separator pressurization bypass valve a and a separator pressurization bypass valve b.
[0009] Preferably, the second pipeline is connected with a quenching water pump P and a quenching water valve, the fourth pipeline 4 is connected with a spray water valve b and a scrubbing water circulation valve, the bottom end of the scrubbing tower is connected with a spray water pump a, and the spray water pump a is connected to the fourth pipeline between the spray water valve b and the scrubbing water circulation valve.
[0010] Preferably, the ninth pipeline is connected with a post-vent valve and a pre-vent valve, the seventh pipeline is connected with a spray water valve a, and the fifth pipeline is connected with a scrubbing water valve UZV10063.
[0011] Preferably, the top of the scrubbing tower is connected with an external pipeline, and the external pipeline is provided with a synthetic gas outlet valve.
[0012] Preferably, the bottom of the gasifier is connected with a cold water makeup pipeline, the sixth pipeline is further connected with a preheating water pipeline, the preheating water pipeline is connected at the lower end of the gasifier, and the preheating water pipeline is provided with a preheating water pump.
[0013] Preferably, the cold water makeup pipeline is connected with a cold water makeup valve a and a cold water makeup valve b, and the preheating water pipeline is connected with a preheating water valve.
[0014] Preferably, the injector is further connected with a nitrogen pipeline, and the first pipeline is connected with an MN pipeline.
[0015] Beneficial effects: the oil residue hydrogenation gasification can shorten the start-up time, the structure is simple, the operation is convenient, the consumption of fuel gas and air can be reduced, the product gas can be increased, and the market application prospect is wide. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is the structural principle block diagram of the present application. DETAILED DESCRIPTION
[0017] The present application is further described below in conjunction with the accompanying drawings of the specification, but the present application is not limited to the following examples.
[0018] With the increasing requirements for carbon emission indicators at home and abroad, traditional gasification technology is increasingly restricted, and heavy oil gasification technology will have a good opportunity and development in the next 10 years. The present application will play a positive role in promoting the wide application of heavy oil gasification technology and the development and optimization process of domestic technology.
[0019] As Figure 1 shown is a specific embodiment of a system for shortening the start-up time of an imported gasification furnace, which is a system for shortening the start-up time of an imported gasification furnace, comprising a gasification furnace R-01, a second pipeline 2 connected to the middle of the gasification furnace R-01, a carbon black separator V-02 connected to the second pipeline 2, the carbon black separator V-02 connected to the middle of a washing tower C-01 through a third pipeline 3, a first pipeline 1 connected to the top end of the gasification furnace R-01, a punch pipeline connected to the first pipeline 1, the punch pipeline connected to the third pipeline 3, a fourth pipeline 4 connected to the upper end of the washing tower C-01, the fourth pipeline 4 connected to the upper end of a carbon black quenching pipe V-01, further comprising a washing water pump P05 connected to washing liquid, the washing water pump P05 connected to the upper end of the washing tower C-01 through a fifth pipeline 5, the fifth pipeline 5 divided into a sixth pipeline 6, the sixth pipeline 6 connected to the lower end of the gasification furnace R-01, further comprising a spray water pump bP04 connected to the lower end of the carbon black quenching pipe V-01 through a seventh pipeline 7, an eighth pipeline 8 connected to the top end of the carbon black quenching pipe V-01, the eighth pipeline 8 connected to the middle of the gasification furnace R-01, the eighth pipeline 8 divided into a ninth pipeline 9, the ninth pipeline 9 connected to an injector J-02, the injector J-02 connected to a chimney J-01 through a pipeline.
[0020] In a preferred embodiment, the fourth pipeline 4 is divided into a plurality of sub-fourth pipelines, the sub-fourth pipelines extend into the carbon black quenching pipe V-01 from top to bottom, and the sub-fourth pipelines located in the carbon black quenching pipe V-01 are all connected to spray heads; the seventh pipeline 7 is divided into a plurality of sub-seventh pipelines, the sub-seventh pipelines extend into the carbon black quenching pipe V-01 from top to bottom, and the sub-seventh pipelines located in the carbon black quenching pipe V-01 are all connected to spray heads.
[0021] In a preferred embodiment, a post-gasifier pressure charging valve 01 and a pre-gasifier pressure charging valve 02 are connected to the first pipeline 1 at the top outlet of the gasifier R-01, and an external pipeline with a gasifier pressure charging vent valve 03 is connected to the first pipeline 1 between the post-gasifier pressure charging valve 01 and the pre-gasifier pressure charging valve 02.
[0022] In a preferred embodiment, the punch pipeline comprises a pre-separator pressure charging valve 06 and a post-separator pressure charging valve 07 connected to the first pipeline 1, an external pipeline with a separator pressure charging vent valve 08 connected to the pre-separator pressure charging valve 06 and the post-separator pressure charging valve 07, a bypass pipeline connected between the upper end of the pre-separator pressure charging valve 06 and the lower end of the post-separator pressure charging valve 07, and a pre-separator pressure charging bypass valve a 09 and a post-separator pressure charging bypass valve b 10 connected to the bypass pipeline.
[0023] In a preferred embodiment, a quenching water pump P02 and a quenching water valve 16 are connected to the second pipeline 2, a spray water valve b 14 and a scrubbing water circulating valve 15 are connected to the fourth pipeline 4, and a spray water pump a P03 is connected to the bottom of the scrubbing tower C-01 and to the fourth pipeline 4 between the spray water valve b 14 and the scrubbing water circulating valve 15.
[0024] In a preferred embodiment, a post-vent valve 04 and a pre-vent valve 05 are connected to the ninth pipeline 9, a spray water valve a 13 is connected to the seventh pipeline 7, and a scrubbing water valve UZV10063 is connected to the fifth pipeline 5.
[0025] In a preferred embodiment, an external pipeline is connected to the top of the scrubbing tower C-01, and a synthetic gas outlet valve 11 is arranged on the external pipeline.
[0026] In a preferred embodiment, a cold water makeup pipeline 10 is connected to the bottom of the gasifier R-01, and a preheated water pipeline 11 is further connected to the sixth pipeline 6, the preheated water pipeline 11 being connected to the lower end of the gasifier R-01 and provided with a preheated water pump P01.
[0027] In a preferred embodiment, a cold water makeup valve a 17 and a cold water makeup valve b 18 are connected to the cold water makeup pipeline 10, and a preheated water valve 12 is connected to the preheated water pipeline 11.
[0028] In a preferred embodiment, a nitrogen pipeline is further connected to the injector J-02, and an MN pipeline is connected to the first pipeline 1.
[0029] The pressure charging process of the present application is as follows:
[0030] The system start-up and pressure charging process is to open the gasifier pressure charging valve 01, the gasifier pressure charging valve 02, the separator pressure charging valve 06, the separator pressure charging valve 07, close the gasifier pressure charging vent valve 03, the separator pressure charging vent valve 08, and use 2.5 MPa-MN to charge the system (MN: 2.5 MPa medium-pressure nitrogen, purity ≥ 99.99%), balance the pipe network pressure for 2 min, open the separator pressure charging bypass valve a09 and the separator pressure charging bypass valve b10 to quickly charge the system to 1.3 MPa, the pressure charging time is controlled within 12-15 min, and the temperature of the gasifier R-01 is reduced by about 100℃.
[0031] The cooling water process is as follows:
[0032] In the prior art, after the system is stopped, the water in the system is high-temperature water > 200℃, and when the system is started again, the system needs to be depressurized to normal pressure, the auxiliary burner of the gasifier R-01 needs to be replaced, and secondary furnace baking operation is performed. At this time, due to the high temperature of the system water, the cooling stage restricts the secondary start-up time. In the present application, the high-temperature synthesis gas (in the gasifier R-01) is preliminarily cooled by the quenching water pumped by the quenching water pump through P02 and the quenching water valve 16. The synthesis gas is washed in the quenching chamber and then enters the carbon black quenching pipe V-01 for further washing. The washing water in the carbon black quenching pipe V-01 comes from the fourth pipeline 4 and the seventh pipeline 7, that is, one stream is sprayed and humidified by the spraying water pump aP03 through the spraying water valve b14, and one stream is sprayed and humidified by the spraying water pump bP04 through the spraying water valve a13. After humidification, the water enters the carbon black separator V-02 for gas-liquid two-phase separation. The liquid phase is circulated to the gasifier R-01 by the quenching water pump P02, and the gas phase enters the washing tower C-01 and is washed again through two paths, that is, one stream is sprayed by the washing water pump P05 through the washing water valve UZV10063, and one stream is circulated into the washing tower C-01 for washing by the spraying water pump aP03 through the washing water circulating valve 15. After passing through the washing tower C-01, the ash content of the synthesis gas is less than 0.1 ug / Nm3, and the synthesis gas is sent to the subsequent process through the synthesis gas outlet valve 11. In the cooling stage, when the system pressure is reduced to 0.5 MPa, the cold water make-up valve b18 is turned on, the valve front blanking plate is in the open position, the cold water make-up valve a17 and the cold water make-up valve b18 are opened, and normal temperature water is supplied to the system. The system water temperature can be quickly reduced to less than 100℃, which saves 3-5 h of water cooling.
[0033] The system product scale oil residue gasification produces 140,000 Nm3 / h of effective gas (CO+H2), and the final hydrogen-rich gas product scale is 141,000 Nm3 / h. The start-up time is shortened to 2 h, which can reduce the consumption of fuel gas and air by about 1,200 Nm3 of fuel gas and 24,000 Nm3 of air for 4-6 h, and the maximum increase in product gas is up to 720,000 Nm3.
[0034] After the system enters the start-up logic, the following steps are carried out: start-up preparation, isolation of pre-start-up materials, establishment of system start-up pressure, establishment of start-up material flow, start of reactor feeding, system pressure increase, and normal operation steps; the start-up and pressure charging process of the application intervenes in the establishment of system start-up pressure stage, the gasifier pressure charging vent valve 03 and the separator pressure charging vent valve 08 are closed and the associated pipelines are cut out; after the gasifier is pressurized, the valve 01, the valve 02 before the gasifier pressure charging, the valve 06 before the separator pressure charging, the valve 07 after the separator pressure charging, the separator pressure charging bypass valve a09 and the separator pressure charging bypass valve b10 are opened and the associated pipelines are put into use, and the system is pressurized to 1.3MPa. After the pressure charging is completed, the valve 01 after the gasifier pressure charging, the valve 02 before the gasifier pressure charging, the valve 06 before the separator pressure charging, the valve 07 after the separator pressure charging, the separator pressure charging bypass valve a09 and the separator pressure charging bypass valve b10 are closed and the associated pipelines are cut out; the gasifier pressure charging vent valve 03 and the separator pressure charging vent valve 08 are opened after the above-mentioned valves are closed and the associated pipelines are put into use; the pressure charging process in the start-up stage can be repeatedly used as needed according to the start-up logic, and the valves are automatically disabled during system operation. During the system shutdown stage, the pressure charging process remains in the closed state, and only during the start-up stage is it put into use and cut out according to the logic needs.
[0035] After the system enters the shutdown logic, the following steps are carried out: isolation of running materials, system isolation, system pressure reduction, material purging, system replacement, and shutdown completion steps; the cooling water process of the application is put into use in the system pressure reduction stage (the system pressure is reduced to 0.5MPa), realizing pressure reduction and cooling at the same time, and shortening the secondary start-up time; when the system pressure drops to 0.5MPa, the cold water makeup valve b18 is in the open position, the cold water makeup valve a17 and the cold water makeup valve b18 are opened to supplement normal temperature water to the system, and the water temperature of the reactor R-01 can be quickly reduced to <100℃; after the water temperature is <90℃, the reactor R-01 performs water circulation switching, the cold water makeup valve b18 and the cold water makeup valve a17 are closed, and the blind plate before the cold water makeup valve b18 is in the blind position; during the system shutdown and cooling to the next start-up, the cooling process is not used again; the cooling process of the application is not used during the normal operation of the system.
[0036] Finally, it should be noted that the application is not limited to the above embodiments, but can have many variations. All variations that can be directly derived or inferred from the disclosure of the application by those of ordinary skill in the art should be considered within the scope of the application.
Claims
1. A system for reducing technical start-up time of an import gasifier, characterized by: It includes gasification furnace (R-01), the second pipeline (2) is connected in the middle of the gasification furnace (R-01), the second pipeline (2) is connected with carbon black separator (V-02), the carbon black separator (V-02) is connected in the middle of washing tower (C-01) by the third pipeline (3), the top of the gasification furnace (R-01) is connected with the first pipeline (1), the first pipeline (1) is connected with the punch pipeline, the punch pipeline is connected on the third pipeline (3), the upper end of the washing tower (C-01) is connected with the fourth pipeline (4), the fourth pipeline (4) is connected on the upper end of carbon black chilling pipe (V-01), it also includes washing water pump (P05) connected with washing liquid, the washing water pump (P05) is connected on the upper end of washing tower (C-01) by the fifth pipeline (5), the fifth pipeline (5) is divided into the sixth pipeline (6), the sixth pipeline (6) is connected at the lower end of the gasification furnace (R-01), it also includes spray water pump b (P04), the spray water pump b (P04) is connected at the lower end of carbon black chilling pipe (V-01) by the seventh pipeline (7), the top of the carbon black chilling pipe (V-01) is connected with the eighth pipeline (8), the eighth pipeline (8) is connected at the middle of the gasification furnace (R-01), the eighth pipeline (8) is divided into the ninth pipeline (9), the ninth pipeline (9) is connected on the injector (J-02), the injector (J-02) is connected on the chimney (J-01) by the pipeline; The fourth pipeline (4) is divided into a plurality of sub-fourth pipelines, the sub-fourth pipelines extend into the carbon black chilling pipe (V-01) from top to bottom, and the sub-fourth pipelines in the carbon black chilling pipe (V-01) are all connected with spray heads; The seventh pipeline (7) is divided into a plurality of sub-seventh pipelines, the sub-seventh pipelines extend into the carbon black chilling pipe (V-01) from top to bottom, and the sub-seventh pipelines in the carbon black chilling pipe (V-01) are all connected with spray heads; The first pipeline (1) on the top outlet of the gasification furnace (R-01) is connected with a gasification furnace pressure charging valve (01) and a gasification furnace pressure charging valve (02), and an outer pipeline with a gasification furnace pressure charging vent valve (03) is connected to the first pipeline (1) between the two valves.
2. The system for shortening the technical start-up time of an import gasifier according to claim 1, characterized in that: The punch pipeline includes a separator pressure charging valve (06) and a separator pressure charging valve (07) connected to the first pipeline (1), a pipeline with a separator pressure charging vent valve (08) is connected between the two valves, a bypass pipeline is connected between the upper end of the separator pressure charging valve (06) and the lower end of the separator pressure charging valve (07), and a separator pressure charging bypass valve a (09) and a separator pressure charging bypass valve b (10) are connected to the bypass pipeline.
3. The system for shortening the technical start-up time of an import gasifier according to claim 1 or 2, characterized in that The second pipeline (2) is connected with a quenching water pump (P02) and a quenching water valve (16), the fourth pipeline (4) is connected with a spray water valve b (14) and a washing water circulating valve (15), the bottom of the washing tower (C-01) is connected with a spray water pump a (P03), and the spray water pump a (P03) is connected to the fourth pipeline (4) between the spray water valve b (14) and the washing water circulating valve (15).
4. The system for shortening the technical start-up time of an import gasifier according to claim 1 or 2, characterized in that: The ninth pipeline (9) is connected with a post-emptying valve (04) and a pre-emptying valve (05), the seventh pipeline (7) is connected with a spray water valve a (13), and the fifth pipeline (5) is connected with a washing water valve UZV10063.
5. The system for shortening start-up time of an imported gasifier according to claim 1, characterized in that: The top of the washing tower (C-01) is connected with an external pipeline, and the external pipeline is provided with a synthesis gas outlet valve.
6. The system for shortening start-up time of an imported gasifier according to claim 1, characterized in that: The bottom of the gasification furnace (R-01) is connected with a cold water supplement pipeline, the sixth pipeline (6) is further connected with a preheating water pipeline (11), the preheating water pipeline (11) is connected at the lower end of the gasification furnace (R-01), and the preheating water pipeline (11) is provided with a preheating water pump (P01).
7. The system for shortening start-up time of an imported gasifier according to claim 6, characterized in that: The cold water supplement pipeline is connected with a cold water supplement valve a (17) and a cold water supplement valve b (18), and the preheating water pipeline (11) is connected with a preheating water valve (12).
8. The system for shortening start-up time of an imported gasifier according to claim 1, characterized in that: The ejector (J-02) is further connected with a nitrogen pipeline.
Citation Information
Patent Citations
System for shortening starting time of imported gasifier technology
CN217077507U