CN212476641U - Overhead multi-nozzle gasification furnace - Google Patents
Overhead multi-nozzle gasification furnace Download PDFInfo
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- CN212476641U CN212476641U CN202021207855.9U CN202021207855U CN212476641U CN 212476641 U CN212476641 U CN 212476641U CN 202021207855 U CN202021207855 U CN 202021207855U CN 212476641 U CN212476641 U CN 212476641U
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Abstract
An overhead multi-nozzle gasification furnace, an aerator pressurizes a pulverized coal lock bucket until the pressure difference between the pulverized coal lock bucket and a pulverized coal feeding tank is 5Kpa, and pulverized coal enters the pulverized coal feeding tank through a conveying pipe II. Oxygen in the oxygen gas-supply pipe is input into the heater and is heated, then is conveyed into the gas mixer through the oxygen outlet pipe and is mixed with steam conveyed in the steam gas-supply pipe, and then is conveyed into the oxygen channel in the start-up burner through the mixed gas inlet pipe, when the burner is ignited for the first time, the start-up burner sprays out gas mixed by gas and oxygen, after the temperature rise and the pressure rise are completed, the fuel gas is cut off, the pulverized coal conveying pipe conveys pulverized coal into each pulverized coal burner and the pulverized coal channel, the start-up burner is used as the pulverized coal burner at the moment, so that the load of a single furnace of the gasification furnace can be improved by 30%, only the start-up burner needs to be replaced according to the abrasion condition of the start-up burner, the yield of the single furnace is improved to the utmost extent, the project investment is saved, and good economic.
Description
Technical Field
The utility model relates to a coal chemical production field, concretely relates to many nozzles of overhead gasifier.
Background
With the rapid development of the domestic coal chemical industry, the gasifier is gradually developed in a large-scale direction, but the gasifier is limited by the temperature and pressure of the gasifier, the gasifier body cannot be infinitely expanded, and how to effectively utilize the limited space in the gasifier and how to improve the load of the conventional gasification device becomes a research subject. With the development of coal chemical industry, multi-nozzle coal water slurry and dry powder gasification furnaces are widely popularized, but the multi-nozzle gasification furnaces are generally provided with a start-up burner in the middle for ignition, temperature rise and pressure rise, after the gasification furnaces normally feed materials, the start-up burner is either quitted to be blown and protected by protective gas or used as an pilot burner to continuously burn fuel gas, a negative pressure backflow area is formed around the start-up burner relative to surrounding pulverized coal process burners, the head of the start-up burner is more easily burnt, the fuel gas is continuously burned to be used as the pilot burner, the gasification furnace load does not work, and meanwhile a large amount of fuel gas is wasted.
Disclosure of Invention
The utility model discloses an overcome not enough of above technique, provide one kind and realized that the nozzle of beginning to work can step up in order to ignite the intensification, can spray the overhead multiinjector gasifier of fine coal burning again.
The utility model overcomes the technical scheme that its technical problem adopted is:
an overhead multi-nozzle gasifier comprising:
the upper end of the pulverized coal storage tank is connected with a pulverized coal feeding pipe, the lower end of the pulverized coal storage tank is connected with a feeding hole of a pulverized coal locking hopper through a conveying pipe I, the pulverized coal locking hopper is connected with an aerator, and the aerator pressurizes the inside of the pulverized coal locking hopper;
the pulverized coal feeding tank is positioned at the lower end of the pulverized coal locking hopper, and the upper end of the pulverized coal feeding tank is connected to a discharge hole of the pulverized coal locking hopper through a conveying pipe II;
the gasification furnace is provided with start-up burners at the middle position of the upper end of the gasification furnace, a plurality of pulverized coal burners are arranged at intervals along the circumferential direction on the periphery of the start-up burners, and the lower end of the pulverized coal feed tank is connected to each pulverized coal burner through a pulverized coal conveying pipe;
the air inlet end of the heater is connected with the oxygen gas conveying pipe, the air outlet end of the heater is connected with the first air inlet end of the gas mixer through the oxygen gas outlet pipe, and the second air inlet end of the gas mixer is connected with the steam gas conveying pipe;
the start-up burner is from outside-in coaxial water jacket I, spacer and the water jacket II that is provided with respectively, has to form annular fine coal passageway between water jacket I and the spacer, fine coal passageway is connected in fine coal conveying pipeline, form the gas passageway between spacer and the water jacket II, the gas passageway is connected in the fuel gas intake pipe, forms the oxygen passageway in the water jacket II, and the oxygen passageway passes through the end of giving vent to anger of gas mixer of gas-mixed intake pipe connection.
For the convenience of control, the pulverized coal conveying pipe is provided with a valve I.
In order to facilitate control, the fuel gas inlet pipe is provided with a valve II.
In order to realize ignition, a high-energy igniter is arranged in the oxygen channel.
In order to realize flame detection, a flame detector is arranged in the oxygen channel.
The utility model has the advantages that: the aerator pressurizes the pulverized coal lock bucket until the pressure difference between the pulverized coal lock bucket and the pulverized coal feeding tank is 5Kpa, and the pulverized coal enters the pulverized coal feeding tank through the conveying pipe II. Oxygen in the oxygen gas-supply pipe is input into the heater and is heated, then is conveyed into the gas mixer through the oxygen outlet pipe and is mixed with steam conveyed in the steam gas-supply pipe, and then is conveyed into the oxygen channel in the start-up burner through the mixed gas inlet pipe, when the burner is ignited for the first time, the start-up burner sprays out gas mixed by gas and oxygen, after the temperature rise and the pressure rise are completed, the fuel gas is cut off, the pulverized coal conveying pipe conveys pulverized coal into each pulverized coal burner and the pulverized coal channel, the start-up burner is used as the pulverized coal burner at the moment, so that the load of a single furnace of the gasification furnace can be improved by 30%, only the start-up burner needs to be replaced according to the abrasion condition of the start-up burner, the yield of the single furnace is improved to the utmost extent, the project investment is saved, and good economic.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the start-up burner of the present invention;
in the figure, 1, a pulverized coal storage tank 2, a pulverized coal locking hopper 3, a pulverized coal feed tank 4, a gasification furnace 5, a pulverized coal feeding pipe 6, a conveying pipe I7, a conveying pipe II 8, a pulverized coal conveying pipe 9, a valve I10, a start-up burner 11, a pulverized coal burner 12, a mixed gas inlet pipe 13, a fuel gas inlet pipe 14, a valve II 15, a heater 16, a gas mixer 17, an oxygen gas inlet pipe 18, an oxygen gas outlet pipe 19, a steam gas inlet pipe 101, a water jacket I102, a spacer sleeve 103, a water jacket II 104, a pulverized coal channel 105, a fuel gas channel 106, an oxygen channel 107, a high-energy igniter 108 and a flame detector.
Detailed Description
The present invention will be further explained with reference to fig. 1 and 2.
An overhead multi-nozzle gasifier comprising: the upper end of the pulverized coal storage tank 1 is connected with a pulverized coal feeding pipe 5, the lower end of the pulverized coal storage tank is connected with a feeding hole of the pulverized coal locking hopper 2 through a conveying pipe I6, the pulverized coal locking hopper 2 is connected with an aerator, and the aerator pressurizes the inside of the pulverized coal locking hopper; the pulverized coal feeding tank 3 is positioned at the lower end of the pulverized coal locking hopper 2, and the upper end of the pulverized coal feeding tank 3 is connected to a discharge hole of the pulverized coal locking hopper 2 through a conveying pipe II 7; the gasification furnace 4 is provided with start-up burners 10 at the middle positions of the upper ends of the gasification furnace 4, a plurality of pulverized coal burners 11 are arranged at intervals on the peripheries of the start-up burners 10 along the circumferential direction, and the lower ends of the pulverized coal feed tanks 3 are connected to the pulverized coal burners 11 through pulverized coal feed pipes 8; a heater 15, the air inlet end of which is connected with an oxygen gas pipe 17, the air outlet end of which is connected with the first air inlet end of a gas mixer 16 through an oxygen gas outlet pipe 18, and the second air inlet end of the gas mixer 16 is connected with a steam gas pipe 19; the start-up burner 10 is coaxially provided with a water jacket I101, a spacer 102 and a water jacket II 103 from outside to inside respectively, an annular pulverized coal channel 104 is formed between the water jacket I101 and the spacer 102, the pulverized coal channel 104 is connected to the pulverized coal conveying pipe 8, a gas channel 105 is formed between the spacer 102 and the water jacket II 103, the gas channel 105 is connected to a fuel gas inlet pipe 13, an oxygen channel 106 is formed in the water jacket II 103, and the oxygen channel 106 is connected to the gas outlet end of a gas mixer 16 through a mixed gas inlet pipe 12. Add fine coal in the fine coal basin 1 through fine coal filling tube 5, during the fine coal in the fine coal basin 1 got into fine coal lock fill 2 through conveying pipeline I6, the aerator pressurized to be 5Kpa with fine coal feed tank 3 pressure differential in 2 to fine coal lock fill, during fine coal got into fine coal feed tank 3 through conveying pipeline II 7. Oxygen in an oxygen gas conveying pipe 17 is input into a heater 15 to be heated, then is conveyed into a gas mixer 16 through an oxygen gas outlet pipe 18 to be mixed with steam conveyed in a steam gas conveying pipe 19, and then is conveyed into an oxygen channel 106 in a start-up burner 10 through a mixed gas inlet pipe 12, when the burner is ignited for the first time, the start-up burner 10 sprays out gas mixed by gas and oxygen, after the temperature and pressure rise are completed, fuel gas is cut off, pulverized coal is conveyed into each pulverized coal burner 11 and each pulverized coal channel 104 through a pulverized coal conveying pipe 8, at the moment, the start-up burner 10 is used as a pulverized coal burner, the single furnace load of a gasification furnace 4 can be improved by 30%, only the start-up burner 10 needs to be replaced according to the abrasion condition of the start-up burner 10, the single furnace yield is improved to the maximum limit, project investment is saved, and good economic benefit and social benefit can be obtained.
Preferably, a valve I9 is arranged on the pulverized coal conveying pipe 8. And a valve II 14 is arranged on the fuel gas inlet pipe 13. When the start-up burner 10 starts to ignite, the valve I9 is closed, the valve II 14 is opened, and the fuel gas in the fuel gas inlet pipe 13 enters the fuel gas channel 105 to be mixed with the oxygen in the oxygen channel 106 for ignition. After ignition, the valve I9 is opened, the valve II 14 is closed, and the pulverized coal conveying pipe 8 conveys pulverized coal into the pulverized coal channel 104 to realize pulverized coal combustion.
Further, a high-energy igniter 107 is provided in the oxygen passage 106. Ignition can be smoothly performed by the high-energy igniter 107, and the flame detector 108 is provided in the oxygen passage 106. The flame detector 108 can detect flame, and production stability is improved.
Claims (5)
1. An overhead multi-nozzle gasifier, comprising:
the pulverized coal locking device comprises a pulverized coal storage tank (1), wherein the upper end of the pulverized coal storage tank is connected with a pulverized coal feeding pipe (5), the lower end of the pulverized coal storage tank is connected with a feeding hole of a pulverized coal locking hopper (2) through a conveying pipe I (6), the pulverized coal locking hopper (2) is connected with an aerator, and the aerator pressurizes the inside of the pulverized coal locking hopper;
the pulverized coal feeding tank (3) is positioned at the lower end of the pulverized coal locking hopper (2), and the upper end of the pulverized coal feeding tank (3) is connected to a discharge hole of the pulverized coal locking hopper (2) through a conveying pipe II (7);
the gasification furnace (4) is provided with a start-up burner (10) in the middle of the upper end of the gasification furnace, a plurality of pulverized coal burners (11) are arranged at intervals on the periphery of the start-up burner (10) along the circumferential direction, and the lower end of the pulverized coal feed tank (3) is connected to each pulverized coal burner (11) through a pulverized coal conveying pipe (8);
the air inlet end of the heater (15) is connected with the oxygen gas conveying pipe (17), the air outlet end of the heater is connected with the first air inlet end of the gas mixer (16) through the oxygen gas outlet pipe (18), and the second air inlet end of the gas mixer (16) is connected with the steam gas conveying pipe (19);
the start-up burner (10) is from outside-in coaxial water jacket I (101), spacer (102) and water jacket II (103) of being provided with respectively, has to form annular fine coal passageway (104) between water jacket I (101) and spacer (102), fine coal passageway (104) is connected in fine coal conveying pipeline (8), form gas channel (105) between spacer (102) and water jacket II (103), gas channel (105) are connected in fuel gas intake pipe (13), form oxygen passageway (106) in water jacket II (103), and oxygen passageway (106) are connected in the end of giving vent to anger of gas mixer (16) through gas mixture intake pipe (12).
2. The overhead multi-nozzle gasifier of claim 1, wherein: and a valve I (9) is arranged on the pulverized coal conveying pipe (8).
3. The overhead multi-nozzle gasifier of claim 1, wherein: and a valve II (14) is arranged on the fuel gas inlet pipe (13).
4. The overhead multi-nozzle gasifier of claim 1, wherein: a high-energy igniter (107) is arranged in the oxygen channel (106).
5. The overhead multi-nozzle gasifier of claim 1, wherein: a flame detector (108) is arranged in the oxygen passage (106).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021207855.9U CN212476641U (en) | 2020-06-28 | 2020-06-28 | Overhead multi-nozzle gasification furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021207855.9U CN212476641U (en) | 2020-06-28 | 2020-06-28 | Overhead multi-nozzle gasification furnace |
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| CN212476641U true CN212476641U (en) | 2021-02-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023087670A1 (en) * | 2021-11-17 | 2023-05-25 | 航天长征化学工程股份有限公司 | Multi-nozzle pulverized coal gasification device and control method for startup and shutdown of coal gasification device |
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2020
- 2020-06-28 CN CN202021207855.9U patent/CN212476641U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023087670A1 (en) * | 2021-11-17 | 2023-05-25 | 航天长征化学工程股份有限公司 | Multi-nozzle pulverized coal gasification device and control method for startup and shutdown of coal gasification device |
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