CN112662433A - Continuous casting method of single-nozzle coal water slurry gasification furnace - Google Patents
Continuous casting method of single-nozzle coal water slurry gasification furnace Download PDFInfo
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- CN112662433A CN112662433A CN202011542041.5A CN202011542041A CN112662433A CN 112662433 A CN112662433 A CN 112662433A CN 202011542041 A CN202011542041 A CN 202011542041A CN 112662433 A CN112662433 A CN 112662433A
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Abstract
The invention relates to the field of operation and operation of a single-nozzle coal water slurry gasification furnace, in particular to a continuous casting method of a single-nozzle coal water slurry gasification furnace. The method comprises the following steps: s1, data confirmation is carried out to ensure that the system pressure difference, the slag hole pressure difference, the chilling water flow and the black water flow of the nozzle coal water slurry gasification furnace are in a normal state; s2, continuously discharging slag from the gasification furnace, and discharging slag accumulated at the bottom of the chilling chamber out of the gasification furnace through a lock hopper; s3, keeping water circulation, keeping the chilling water in a flowing state, and preventing the chilling water pipeline from being blocked; s4, discharging slag and ash, discharging the accumulated ash in the filter, and discharging the accumulated slag at the bottom of the carbon washing tower; s5, adding a medicament, adding a dispersing agent into the grey water, and adding a flocculating agent into the black water; and S6, igniting and feeding, and continuously observing the operation condition of each system. The invention has the advantages of ingenious design, reasonable steps and realization without spending more cost, can effectively solve the problem of low production efficiency caused by blowing-out maintenance, and is suitable for wide popularization and use.
Description
Technical Field
The invention relates to the field of operation and operation of a single-nozzle coal water slurry gasification furnace, in particular to a continuous casting method of a single-nozzle coal water slurry gasification furnace.
Background
The single-nozzle coal water slurry gasification furnace generally operates for about 90 days, and the gasification furnace needs to be overhauled to ensure the continuous safe and stable operation. The whole inspection and maintenance process needs 120 hours, which wastes a large amount of manpower and material resources and affects the production task all the year round. Most importantly, a plurality of potential safety hazards can be caused during the furnace shutdown maintenance, and the risk that the rear system is shut down due to the loss of the gas source is increased.
Therefore, it is necessary to solve the above-mentioned technical problems.
Disclosure of Invention
Aiming at the problems, the invention provides a continuous casting method of a single-nozzle coal water slurry gasification furnace, which greatly improves the actual continuous operation time of the single-nozzle coal water slurry gasification furnace and avoids furnace shutdown maintenance, and the technical scheme adopted by the invention is as follows:
a continuous casting method of a single-nozzle coal water slurry gasification furnace comprises the following steps:
s1, data confirmation is carried out to ensure that the system pressure difference, the slag hole pressure difference, the chilling water flow and the black water flow of the nozzle coal water slurry gasification furnace are in a normal state;
s2, continuously discharging slag from the gasification furnace, and discharging slag accumulated at the bottom of the chilling chamber out of the gasification furnace through a lock hopper;
s3, keeping water circulation, keeping the chilling water in a flowing state, and preventing the chilling water pipeline from being blocked;
s4, discharging slag and ash, discharging the accumulated ash in the filter, and discharging the accumulated slag at the bottom of the carbon washing tower;
s5, adding a medicament, adding a dispersing agent into the grey water, and adding a flocculating agent into the black water;
and S6, igniting and feeding, and continuously observing the operation condition of each system.
Further, in step S1:
the data confirmation comprises that the pressure difference of a single-nozzle coal water slurry gasification furnace system is not more than 0.06Mpa, the pressure difference of a slag hole is below 40Kpa, the chilling water flow reaches the full range of 250m3/h, and the black water flow of the gasification furnace and the carbon washing tower is normal, high flash pressure and normal liquid level.
Further, in step S2:
the slag is continuously discharged from the gasification furnace for at least 3 times, and the slag accumulated at the bottom of the chilling chamber is discharged out of the furnace as much as possible through a lock hopper.
Further, the specific step of S3 is:
the water circulation of the gasification furnace is kept not to stop running, the chilling water is kept in a flowing state, the chilling water pipeline is prevented from being blocked, and the black water pipeline of the gasification furnace and the carbon washing tower is rapidly washed.
Further, the specific step of S4 is:
opening a blowoff valve of the chilling water filter to discharge accumulated dust in the filter and ensure the smoothness of the filter; disassembling the black water root valve blind head of the carbon washing tower, opening the root valve, and discharging the accumulated slag at the bottom of the carbon washing tower;
further, the specific step of S5 is:
controlling the addition of the medicament, and adding an ash water dispersing agent into the ash water at a rate of 50Kg/h, wherein the concentration of the dispersing agent in the ash water is kept at 203 ppm; and adding a flocculating agent into the black water at a rate of 0.85Kg/h, and keeping the concentration of the flocculating agent in the black water at 2ppm, so that the grey water and the black water of the gasification furnace can normally run.
Further, the specific step of S6 is:
and (4) after the steps from S1 to S5 are completed, igniting and feeding the gasification furnace, and continuously observing the operation condition of each system until the whole system operates normally.
Further, in step S2:
and (4) enabling the chilling water to reach the full range by actuating the chilling water pump, and confirming that the chilling water pump does not exceed the specified current when the chilling water reaches the full range.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the continuous casting method of the single-nozzle coal-water-slurry gasification furnace, the continuous casting preparation is prepared by judging the continuous casting conditions of the single-nozzle coal-water-slurry gasification furnace and adjusting, and finally the continuous casting is implemented, so that the actual continuous operation time of the single-nozzle coal-water-slurry gasification furnace is greatly improved, the increase of the production cost caused by furnace shutdown maintenance is avoided, and the method is far superior to the prior art.
2. The continuous casting method of the single-nozzle coal water slurry gasification furnace provided by the invention has the technical effects of reducing the maintenance time of the single-nozzle coal water slurry gasification furnace, prolonging the continuous operation time of the single-nozzle coal water slurry gasification furnace, reducing the risk of stopping the system without an air source, and practically improving the physical output of the system.
3. The continuous feeding method of the single-nozzle coal water slurry gasification furnace provided by the invention compresses the original 120-hour inspection and maintenance time to about 8 hours of continuous feeding time, and the gasification furnace can directly carry out feeding and production recovery, thereby effectively improving the production efficiency.
In conclusion, the invention has the advantages of ingenious design, reasonable steps and no need of spending more cost, can effectively solve the problem of low production efficiency caused by blowing-out maintenance, and is suitable for wide popularization and application.
Drawings
FIG. 1 is a flow chart of the method steps of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the invention provides a continuous casting method of a single-nozzle coal water slurry gasification furnace, which comprises the following steps:
s1, data confirmation is carried out to ensure that the system pressure difference, the slag hole pressure difference, the chilling water flow and the black water flow of the nozzle coal water slurry gasification furnace are in a normal state; the data confirmation comprises that the pressure difference of a single-nozzle coal water slurry gasification furnace system is not more than 0.06Mpa, which indicates that the blockage phenomenon does not exist in the synthesis gas pipeline, and the synthesis gas can be smoothly sent to the carbon washing tower from the gasification furnace; 2. the slag hole differential pressure is below 40Kpa, which indicates that the bottom of the combustion chamber is smooth, and the coal ash and the synthesis gas after reaction can be smoothly discharged to the chilling chamber; 3. the chilling water flow rate is 250m3/h and is a full range, and the chilling water pump is ensured to successfully reach the full range under the condition of not exceeding the current by actuating the outlet valve of the chilling water pump, which indicates that the chilling water filter, the chilling ring and a pipeline thereof are not blocked, and the chilling water can quickly reach the chilling ring; 4. the black water flow of the gasification furnace and the carbon washing tower is normal, the high flash pressure and the liquid level are normal, the bottom of the gasification furnace and the bottom of the carbon washing tower are smooth, the flash system operates normally, and comprehensive judgment is performed temporarily without maintenance.
And S2, continuously discharging slag for 3 times from the gasification furnace, and discharging the slag accumulated at the bottom of the chilling chamber out of the furnace as much as possible through a lock hopper.
S3, keeping water circulation, keeping the gasification furnace water circulation without stopping, keeping the chilling water in a flowing state, and preventing the chilling water pipeline from being blocked; and the black water pipelines of the gasification furnace and the carbon washing tower are quickly washed, so that scaling and blockage are prevented.
S4, discharging slag and ash, opening a drain valve of the chilling water filter, discharging the ash accumulated in the filter as much as possible, and ensuring the smoothness of the filter; and (4) disassembling the blind head of the black water root valve of the carbon washing tower, opening the root valve, and discharging the accumulated slag at the bottom of the carbon washing tower.
S5, adding medicaments, and strictly executing the use amount of various medicaments during normal operation, wherein the grey water dispersing agent is 50Kg/h, and the concentration in the grey water is 203 ppm; 0.85Kg/h of flocculating agent, and the concentration in the black water is 2ppm, so that the black water of the gasification furnace can normally run.
And S6, igniting and feeding, performing the above matched guarantee measures, igniting and feeding the gasifier, and continuously observing the operation condition of each system until the whole system operates normally.
The invention relates to the following principle:
the invention relates to a continuous casting method of a single-nozzle coal-water slurry gasification furnace. Secondly, preparing continuous casting; and thirdly, carrying out continuous casting. The actual continuous operation time of the single-nozzle coal water slurry gasification furnace is finally improved, the risk of stopping a rear system without an air source is reduced, the physical output of the system is improved, the maintenance time of 120 hours is reduced to about 8 hours, the continuous operation technical scheme not only saves the maintenance cost, but also gains the production time, and the yield of the synthetic ammonia is 334843.31 tons all the year round after the method is used, and the yield exceeds the planned 14843.31 tons; the yield of the urea is 588525.24 tons, and the over-planning is 46525.24 tons), compared with the prior art, the actual yield of the synthetic ammonia is improved by 5 ten thousand tons and the yield of the urea is improved by 10 ten thousand tons all the year round.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (8)
1. A continuous casting method of a single-nozzle coal water slurry gasification furnace is characterized by comprising the following steps:
s1, data confirmation is carried out to ensure that the system pressure difference, the slag hole pressure difference, the chilling water flow and the black water flow of the nozzle coal water slurry gasification furnace are in a normal state;
s2, continuously discharging slag from the gasification furnace, and discharging slag accumulated at the bottom of the chilling chamber out of the gasification furnace through a lock hopper;
s3, keeping water circulation, keeping the chilling water in a flowing state, and preventing the chilling water pipeline from being blocked;
s4, discharging slag and ash, discharging the accumulated ash in the filter, and discharging the accumulated slag at the bottom of the carbon washing tower;
s5, adding a medicament, adding a dispersing agent into the grey water, and adding a flocculating agent into the black water;
and S6, igniting and feeding, and continuously observing the operation condition of each system.
2. The continuous casting method of the single-nozzle coal-water slurry gasification furnace according to claim 1, wherein in the step S1:
the data confirmation comprises that the pressure difference of a single-nozzle coal water slurry gasification furnace system is not more than 0.06Mpa, the pressure difference of a slag hole is below 40Kpa, the chilling water flow reaches the full range of 250m3/h, and the black water flow of the gasification furnace and the carbon washing tower is normal, high flash pressure and normal liquid level.
3. The continuous casting method of the single-nozzle coal-water slurry gasification furnace according to claim 1, wherein in the step S2:
the slag is continuously discharged from the gasification furnace for at least 3 times, and the slag accumulated at the bottom of the chilling chamber is discharged out of the furnace as much as possible through a lock hopper.
4. The continuous casting method of the single-nozzle coal-water slurry gasification furnace according to claim 1, wherein the S3 comprises the following steps:
the water circulation of the gasification furnace is kept not to stop running, the chilling water is kept in a flowing state, the chilling water pipeline is prevented from being blocked, and the black water pipeline of the gasification furnace and the carbon washing tower is rapidly washed.
5. The continuous casting method of the single-nozzle coal-water slurry gasification furnace according to claim 1, wherein the S4 comprises the following steps:
opening a blowoff valve of the chilling water filter to discharge accumulated dust in the filter and ensure the smoothness of the filter; disassembling the black water root valve blind head of the carbon washing tower, opening the root valve, and discharging the accumulated slag at the bottom of the carbon washing tower;
6. the continuous casting method of the single-nozzle coal-water slurry gasification furnace according to claim 1, wherein the S5 comprises the following steps:
controlling the addition of the medicament, and adding an ash water dispersing agent into the ash water at a rate of 50Kg/h, wherein the concentration of the dispersing agent in the ash water is kept at 203 ppm; and adding a flocculating agent into the black water at a rate of 0.85Kg/h, and keeping the concentration of the flocculating agent in the black water at 2ppm, so that the grey water and the black water of the gasification furnace can normally run.
7. The continuous casting method of the single-nozzle coal-water slurry gasification furnace according to claim 1, wherein the S6 comprises the following steps:
and (4) after the steps from S1 to S5 are completed, igniting and feeding the gasification furnace, and continuously observing the operation condition of each system until the whole system operates normally.
8. The continuous casting method of the single-nozzle coal-water slurry gasification furnace according to claim 2, wherein in the step S2:
and (4) enabling the chilling water to reach the full range by actuating the chilling water pump, and confirming that the chilling water pump does not exceed the specified current when the chilling water reaches the full range.
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|---|---|---|---|---|
| DE10355912A1 (en) * | 2003-11-29 | 2005-06-30 | Wiebe, Jörg | Gasifying fuel bales comprises continuously feeding the bales through a charging gate into a gasification chamber |
| CN101050386A (en) * | 2007-02-14 | 2007-10-10 | 兖矿集团有限公司 | Method for online lowering of charge for gasification burner tip |
| CN102146300A (en) * | 2011-02-23 | 2011-08-10 | 惠生工程（中国）有限公司 | Combined burning platform |
| CN103409169A (en) * | 2013-06-14 | 2013-11-27 | 水煤浆气化及煤化工国家工程研究中心 | Gasification device and online feeding method with water coal slurry or pulverized coal as raw material |
| CN203668323U (en) * | 2013-12-17 | 2014-06-25 | 神华集团有限责任公司 | Feeding system of coal water slurry gasification furnace and coal gasification system thereof |
-
2020
- 2020-12-23 CN CN202011542041.5A patent/CN112662433A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10355912A1 (en) * | 2003-11-29 | 2005-06-30 | Wiebe, Jörg | Gasifying fuel bales comprises continuously feeding the bales through a charging gate into a gasification chamber |
| CN101050386A (en) * | 2007-02-14 | 2007-10-10 | 兖矿集团有限公司 | Method for online lowering of charge for gasification burner tip |
| CN102146300A (en) * | 2011-02-23 | 2011-08-10 | 惠生工程（中国）有限公司 | Combined burning platform |
| CN103409169A (en) * | 2013-06-14 | 2013-11-27 | 水煤浆气化及煤化工国家工程研究中心 | Gasification device and online feeding method with water coal slurry or pulverized coal as raw material |
| CN203668323U (en) * | 2013-12-17 | 2014-06-25 | 神华集团有限责任公司 | Feeding system of coal water slurry gasification furnace and coal gasification system thereof |
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| 聂成元等: "《气化操作工》", 31 January 2009, 中国矿业大学出版社 * |
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Application publication date: 20210416 |