CN109722312A - A kind of method of low energy consumption coal water slurry gasification system and heating water-coal-slurry - Google Patents
A kind of method of low energy consumption coal water slurry gasification system and heating water-coal-slurry Download PDFInfo
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- CN109722312A CN109722312A CN201910145693.6A CN201910145693A CN109722312A CN 109722312 A CN109722312 A CN 109722312A CN 201910145693 A CN201910145693 A CN 201910145693A CN 109722312 A CN109722312 A CN 109722312A
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- 239000003250 coal slurry Substances 0.000 title claims abstract description 172
- 239000003245 coal Substances 0.000 title claims abstract description 88
- 238000002309 gasification Methods 0.000 title claims abstract description 62
- 238000010438 heat treatment Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 239000002002 slurry Substances 0.000 title claims abstract description 29
- 238000005265 energy consumption Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000000227 grinding Methods 0.000 claims abstract description 31
- 230000008676 import Effects 0.000 claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 15
- 239000000523 sample Substances 0.000 claims description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 6
- 230000036284 oxygen consumption Effects 0.000 abstract description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 229910000754 Wrought iron Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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Abstract
The invention discloses a kind of low energy consumption coal water slurry gasification systems, including coal bucket, the discharge port of coal hopper is connect with coal scale feeder, the import of coal scale feeder and coal pulverizer connects, coal pulverizer is connect with grinding machine blow tank, the outlet of grinding machine blow tank and grinding machine blow tank pump connect, grinding machine blow tank pump is connect with coal slurry slot, the coal slurry slot and coal slurry feedstock pump connect, coal slurry feedstock pump is connect by coal slurry delivery pipe with gasification furnace, it is provided with heating device in coal slurry delivery pipe, is additionally provided with temperature-detecting device in coal slurry delivery pipe.Also disclose a kind of method for heating water-coal-slurry.The present invention can heat the water-coal-slurry liquid in coal slurry delivery pipe, and maintain the water-coal-slurry liquid in delivery pipe within the scope of certain temperature, can reduce coal consumption amount and oxygen consumption, reduce the discharge amount of carbon dioxide.
Description
Technical field
The present invention relates to a kind of methods of low energy consumption coal water slurry gasification system and heating water-coal-slurry, belong to coal chemical industry water-coal-slurry
Field of gasification.
Background technique
Coal-water slurry gasification is by coal and water is delivered in gasification furnace by water-coal-slurry prepared by grinding machine grinding and oxygen
Solid/liquid/gas reactions generate water-gas, which carried out under 1350 DEG C of hot conditions.Since water-coal-slurry contains 30~35% water
Point, with evaporation water when oxygen reactive combustion and absorb the heat in gasification furnace, in order to maintain the furnace temperature of gasification furnace, need to fill
Coal is to maintain the temperature in gasification furnace, and to guarantee reaction condition when water-gas generation, and water-coal-slurry will lose in burning
The calorific value of gasification furnace about 3%~4%.Thus during water gas two-stage gasifier, the coal consumption amount and oxygen consumption when system is run are big, fortune
Row is at high cost.In Chemical Manufacture, general heating method is all to utilize heat exchanger, but heat exchanger will increase the conveying of water-coal-slurry
Resistance, coal slurry are also easy to blocking heat exchanger, influence the stability of production.
Summary of the invention
The object of the present invention is to provide a kind of low energy consumption coal water slurry gasification systems, can heat in coal slurry delivery pipe
Water-coal-slurry is maintained before so that water-coal-slurry is entered gasification furnace within the scope of certain temperature, reduce water-coal-slurry in gasification furnace with oxygen
The heat absorbed when reactive combustion, reduces the thermal loss of gasification furnace, to reduce the coal consumption amount and oxygen consumption when system operation
Amount reduces operating cost.
In order to solve the above technical problems, the present invention adopts the following technical scheme that: a kind of low energy consumption coal water slurry gasification system,
Including coal bucket, the discharge port of coal hopper is connect with coal scale feeder, the import connection of coal scale feeder and coal pulverizer, mill
Coal machine is connect with grinding machine blow tank, and the outlet of grinding machine blow tank and grinding machine blow tank pump connect, the grinding machine blow tank pump and coal
Stock tank connection, the coal slurry slot and coal slurry feedstock pump connect, and the coal slurry feedstock pump is connect by coal slurry delivery pipe with gasification furnace,
It is provided with heating device in the coal slurry delivery pipe, is additionally provided with temperature-detecting device in the coal slurry delivery pipe.Pass through heating
Device heats the water-coal-slurry in coal slurry delivery pipe, and the temperature before making water-coal-slurry enter gasification furnace is at 190 DEG C or so, to reduce to gas
Change the absorption of reaction heat, to reduce coal consumption and oxygen consumption, and then reduces the discharge amount of carbon dioxide.
A kind of low energy consumption coal water slurry gasification system above-mentioned, the heating device include jacket hot tracing pipe, steam pipeline,
The jacket hot tracing pipe is set on the outer wall of coal slurry delivery pipe, and the steam pipeline is connect with jacket hot tracing pipe.Collet companion
The higher vapor of temperature is passed through in heat pipe, using vapor heat in water-coal-slurry, temperature when water-coal-slurry being made to enter gasification furnace
Degree is 180 DEG C~200 DEG C.
A kind of low energy consumption coal water slurry gasification system above-mentioned, the temperature-detecting device includes temp probe, the temperature
Probe is set to the outlet end of the coal slurry delivery pipe.The temp probe that coal slurry delivery pipe outlet end is arranged in, which is able to detect, to be added
Whether the temperature of hot water coal slurry is at 180 DEG C~200 DEG C.
A kind of low energy consumption coal water slurry gasification system above-mentioned, the water-coal-slurry temperature in the coal slurry delivery pipe is 180 DEG C~
200℃。
A kind of low energy consumption coal water slurry gasification system above-mentioned, the entrance of the gasification furnace are provided with gasifier nozzle, institute
Coal slurry delivery pipe is stated to connect by gasifier nozzle with gasification furnace.Water-coal-slurry after being heated in coal slurry delivery pipe passes through gasification furnace
Burner enters gasification furnace.
A kind of low energy consumption coal water slurry gasification system above-mentioned, further includes oxygen cathete, and the oxygen cathete and gasifier nozzle connect
It connects.Outside air enters gasifier nozzle by oxygen cathete, is mixed with oxygen with water-coal-slurry.
A kind of low energy consumption coal water slurry gasification system above-mentioned, the heating device include coil pipe heat tracing part, steam pipeline,
Steam pipeline is connect with coil pipe heat tracing part, and the coil pipe heat tracing part is set on the outer wall of coal slurry delivery pipe.Steam pipeline
It is connect with steam generation facility, low-pressure steam caused by steam generation facility is passed through coil pipe heat tracing part by steam pipeline
In, coal slurry delivery pipe is heated by coil pipe heat tracing part.
A kind of low energy consumption coal water slurry gasification system above-mentioned, the steam inlet end of the heating device are provided with temperature
Regulating valve is additionally provided with steam trap on heating device.By steam trap by low-pressure steam condensing recovery.
A kind of low energy consumption coal water slurry gasification system above-mentioned, the water-coal-slurry temperature in coal slurry delivery pipe are 190 DEG C.
A method of heating water-coal-slurry, including low-pressure steam is introduced, using in low-pressure steam heating coal slurry delivery pipe
Water-coal-slurry；Detect the temperature of water-coal-slurry in coal slurry delivery pipe；Control the intake of low-pressure steam；When water-coal-slurry temperature is lower than 185
DEG C when, increase the intake of low-pressure steam, so that the temperature of water-coal-slurry maintains 180 DEG C~200 DEG C of model in coal slurry delivery pipe
In enclosing.
The surplus steam that low-pressure steam generates in subsequent handling in coal plant.Low-pressure steam passes through steam pipeline
It is transported in the jacket hot tracing pipe of heating device, heats steam using the jacket hot tracing pipe being arranged on steam pipeline outer wall
Water-coal-slurry is heated to 180 DEG C~200 DEG C, and the temperature by the way that coal slurry delivery pipe outlet end is arranged in by the water-coal-slurry in delivery pipe
The accurate detection of degree probe flows through the temperature of delivery pipe outlet end water-coal-slurry, is adjusted with being controlled in time according to the temperature of detected water-coal-slurry
The intake of whole low-pressure steam.
Another scheme is to be delivered to low-pressure steam in the coil pipe heat tracing part of heating device by steam pipeline.
Compared with prior art, the present invention in the coal slurry delivery pipe that is arranged between gasification furnace and coal slurry feedstock pump by setting
Heating device is set to heat the water-coal-slurry in coal slurry delivery pipe, there is certain temperature, to subtract before so that water-coal-slurry is entered gasification furnace
Few water-coal-slurry in gasification furnace with the heat that is absorbed when oxygen reactive combustion, to reduce the coal consumption amount and oxygen when system operation
Consumption；The temperature that water-coal-slurry in coal slurry delivery pipe is monitored by the temperature-detecting device being arranged in coal slurry delivery pipe, according to institute
The temperature for monitoring water-coal-slurry, adjusts the intake of vapor with the water-coal-slurry in heated transfer line, makes the water-coal-slurry in delivery pipe
It maintains in higher temperature range, ensure that water-coal-slurry is entered in gasification furnace with certain temperature, when reducing system operation
Coal consumption amount and oxygen consumption, reduce operating cost, decrease the discharge amount of carbon dioxide, improve synthesis gas active principle.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of embodiment of the invention；
Fig. 2 is the enlarged drawing of A in Fig. 1.
Appended drawing reference: 1- coal bucket, 2- coal scale feeder, 3- coal pulverizer, 4- grinding machine blow tank, 5- grinding machine blow tank
Pump, 6- coal slurry slot, 7- coal slurry feedstock pump, 8- coal slurry delivery pipe, 9- gasification furnace, 10- heating device, 11- temperature-detecting device,
12- gasifier nozzle, 13- oxygen cathete, 14- jacket hot tracing pipe, 15- steam pipeline, 16- temperature control valve (TCV), 17- steam trap.
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
Specific embodiment
The embodiment of the present invention 1: a kind of low energy consumption coal water slurry gasification system, including coal bucket 1, the discharge port of coal hopper 1
It is connect with coal scale feeder 2, coal scale feeder 2 is connect with the import of coal pulverizer 3, the coal pulverizer 3 and grinding machine blow tank 4
The outlet of connection, grinding machine blow tank 4 is connect with grinding machine blow tank pump 5, and the grinding machine blow tank pump 5 is connect with coal slurry slot 6, described
Coal slurry slot 6 is connect with coal slurry feedstock pump 7, and the coal slurry feedstock pump 7 is connect by coal slurry delivery pipe 8 with gasification furnace 9, the coal slurry
It is provided with heating device 10 in delivery pipe 8, is additionally provided with temperature-detecting device 11 in the coal slurry delivery pipe 8.
The embodiment of the present invention 2: a kind of low energy consumption coal water slurry gasification system, including coal bucket 1, the discharge port of coal hopper 1
It is connect with coal scale feeder 2, coal scale feeder 2 is connect with the import of coal pulverizer 3, the coal pulverizer 3 and grinding machine blow tank 4
The outlet of connection, grinding machine blow tank 4 is connect with grinding machine blow tank pump 5, and the grinding machine blow tank pump 5 is connect with coal slurry slot 6, described
Coal slurry slot 6 is connect with coal slurry feedstock pump 7, and the coal slurry feedstock pump 7 is connect by coal slurry delivery pipe 8 with gasification furnace 9, the coal slurry
It is provided with heating device 10 in delivery pipe 8, is additionally provided with temperature-detecting device 11 in the coal slurry delivery pipe 8.Heating device 10
Including jacket hot tracing pipe 14, steam pipeline 15, the jacket hot tracing pipe 14 is set on the outer wall of coal slurry delivery pipe 8, described
Steam pipeline 15 is connect with jacket hot tracing pipe 14.Temperature-detecting device 11 includes temp probe, and the temp probe is set to
The outlet end of the coal slurry delivery pipe 8.Coal slurry temperature in coal slurry delivery pipe 8 is 180 DEG C~200 DEG C.The entrance of gasification furnace 9
It is provided with gasifier nozzle 12, the coal slurry delivery pipe 8 is connect by gasifier nozzle 12 with gasification furnace 9.It further include oxygen cathete
13, the oxygen cathete 13 is connect with gasifier nozzle 12.The steam inlet end of heating device 10 is provided with temperature control valve (TCV) 16.Add
Steam trap 17 is additionally provided in thermal 10.Pass through the low-pressure steam in 17 condensing recovery jacket hot tracing pipe 14 of steam trap.
The embodiment of the present invention 3: a kind of low energy consumption coal water slurry gasification system, including coal bucket 1, the discharge port of coal hopper 1
It is connect with coal scale feeder 2, coal scale feeder 2 is connect with the import of coal pulverizer 3, the coal pulverizer 3 and grinding machine blow tank 4
The outlet of connection, grinding machine blow tank 4 is connect with grinding machine blow tank pump 5, and the grinding machine blow tank pump 5 is connect with coal slurry slot 6, described
Coal slurry slot 6 is connect with coal slurry feedstock pump 7, and the coal slurry feedstock pump 7 is connect by coal slurry delivery pipe 8 with gasification furnace 9, the coal slurry
It is provided with heating device 10 in delivery pipe 8, is additionally provided with temperature-detecting device 11 in the coal slurry delivery pipe 8.Heating device 10
Including jacket hot tracing pipe 14, steam pipeline 15, the jacket hot tracing pipe 14 is set on the outer wall of coal slurry delivery pipe 8, described
Steam pipeline 15 is connect with jacket hot tracing pipe 14.Temperature-detecting device 11 includes temp probe, and the temp probe is set to
The outlet end of the coal slurry delivery pipe 8.Coal slurry temperature in coal slurry delivery pipe 8 is 180 DEG C~200 DEG C.The entrance of gasification furnace 9
It is provided with gasifier nozzle 12, the coal slurry delivery pipe 8 is connect by gasifier nozzle 12 with gasification furnace 9.It further include oxygen cathete
13, the oxygen cathete 13 is connect with gasifier nozzle 12.Heating device 10 includes coil pipe heat tracing part, steam pipeline 15, steam
Delivery pipe 15 is connect with coil pipe heat tracing part, and the coil pipe heat tracing part is set on the outer wall of coal slurry delivery pipe 8.Coal slurry delivery pipe 8
In coal slurry temperature be 190 DEG C.The steam inlet end of heating device 10 is provided with temperature control valve (TCV) 16.It is also set on heating device 10
It is equipped with steam trap 17.Pass through the low-pressure steam in 17 condensing recovery coil pipe heat tracing part of steam trap.
Embodiment 4: a method of heating water-coal-slurry, including low-pressure steam is introduced, it is defeated using low-pressure steam heating coal slurry
Send the water-coal-slurry in pipe；Detect the temperature of water-coal-slurry in coal slurry delivery pipe；Control the intake of low-pressure steam；When water-coal-slurry temperature
When lower than 185 DEG C, increase the intake of low-pressure steam so that in coal slurry delivery pipe 8 temperature of water-coal-slurry maintain 180 DEG C~
In the range of 200 DEG C.The surplus steam that low-pressure steam generates in subsequent handling in coal plant.Low-pressure steam passes through steam
Delivery pipe 15 is transported in the jacket hot tracing pipe 14 of heating device 10, passes through the collet being arranged on 15 outer wall of steam pipeline
Heat tracing pipe 14 heats the water-coal-slurry in steam pipeline 15, water-coal-slurry is heated to 180 DEG C~200 DEG C, and by being arranged in coal
The temp probe of slurry 8 outlet end of delivery pipe accurately detects the temperature for flowing through 8 outlet end water-coal-slurry of delivery pipe, in time according to being examined
Survey the intake of the temperature control adjustment low-pressure steam of water-coal-slurry.
Embodiment 5: a method of heating water-coal-slurry, including low-pressure steam is introduced, it is defeated using low-pressure steam heating coal slurry
Send the water-coal-slurry in pipe；Detect the temperature of water-coal-slurry in coal slurry delivery pipe；Control the intake of low-pressure steam；When water-coal-slurry temperature
When lower than 185 DEG C, increase the intake of low-pressure steam so that in coal slurry delivery pipe 8 temperature of water-coal-slurry maintain 180 DEG C~
In the range of 200 DEG C.The surplus steam that low-pressure steam generates in subsequent handling in coal plant.Low-pressure steam passes through steam
Delivery pipe 15 is transported in the coil pipe heat tracing part of heating device 10.Pass through the coil pipe companion being arranged on 15 outer wall of steam pipeline
Warmware heats the water-coal-slurry in steam pipeline 15, water-coal-slurry is heated to 180 DEG C~200 DEG C, and defeated in coal slurry by being arranged
The temp probe of 8 outlet end of pipe is sent accurately to detect the temperature for flowing through 8 outlet end water-coal-slurry of delivery pipe, in time according to detected water
The intake of the temperature control adjustment low-pressure steam of coal slurry.
The working principle of the invention: the feed coal stored in coal bucket 1 is delivered to coal pulverizer 3 through coal scale feeder 2
Inner barrel, while water, additive enter the inner barrel of coal pulverizer 3 by pipeline simultaneously, the motor of coal pulverizer 3 drives cylinder
Rotating, which makes rod iron roll, grinds feed coal.Raw material coal slurry reaches release mesh and is discharged through discharge gate after grinding, complete
At process of lapping.Raw material coal slurry is sieved through grinding machine blow tank 4, and the qualified water-coal-slurry after screening is gone out by grinding machine blow tank 4
Slurry mouth enters coal slurry slot 6, is sent water-coal-slurry to gasifier nozzle 12 by coal slurry delivery pipe 8 using 7 pressurization of coal slurry feedstock pump.?
Heating device 10 is set on 8 outer wall of coal slurry delivery pipe, water-coal-slurry is heated using low-pressure steam, is made in coal slurry delivery pipe 8
Water-coal-slurry temperature reach 190 DEG C or so, since steam partial pressure is about 1MPa in gasification furnace 9, corresponding saturation temperature be 180
DEG C, so the vapor rapid vaporization after the decompression atomization of gasifying furnace nozzle 12, in water-coal-slurry.Since the water in water-coal-slurry steams
The gas latent heat of vaporization is the heat using itself, reduces the absorption for gasification reaction heat, to reduce gasification reaction process
Coal consumption and oxygen consumption.
Claims (10)
1. a kind of low energy consumption coal water slurry gasification system, which is characterized in that including coal bucket (1), the discharge port and coal of coal hopper (1)
Scale feeder (2) connection, coal scale feeder (2) are connect with the import of coal pulverizer (3), and the coal pulverizer (3) goes out with grinding machine
The outlet of hopper (4) connection, grinding machine blow tank (4) is connect with grinding machine blow tank pump (5), the grinding machine blow tank pump (5) and coal
Stock tank (6) connection, the coal slurry slot (6) connect with coal slurry feedstock pump (7), and the coal slurry feedstock pump (7) passes through coal slurry delivery pipe
(8) it connect with gasification furnace (9), is provided with heating device (10) on the coal slurry delivery pipe (8), on the coal slurry delivery pipe (8)
It is additionally provided with temperature-detecting device (11).
2. a kind of low energy consumption coal water slurry gasification system according to claim 1, which is characterized in that the heating device (10)
Including jacket hot tracing pipe (14), steam pipeline (15), the jacket hot tracing pipe (14) is set to the outer wall of coal slurry delivery pipe (8)
On, the steam pipeline (15) connect with jacket hot tracing pipe (14).
3. a kind of low energy consumption coal water slurry gasification system according to claim 2, which is characterized in that the temperature-detecting device
It (11) include temp probe, the temp probe is set to the outlet end of the coal slurry delivery pipe.
4. a kind of low energy consumption coal water slurry gasification system according to claim 3, which is characterized in that the coal slurry delivery pipe
(8) the water-coal-slurry temperature in is 180 DEG C~200 DEG C.
5. a kind of low energy consumption coal water slurry gasification system according to claim 4, which is characterized in that the gasification furnace (9)
Entrance is provided with gasifier nozzle (12), and the coal slurry delivery pipe (8) is connected by gasifier nozzle (12) and gasification furnace (9)
It connects.
6. a kind of low energy consumption coal water slurry gasification system according to claim 5, which is characterized in that further include oxygen cathete
(13), the oxygen cathete (13) connect with gasifier nozzle (12).
7. a kind of low energy consumption coal water slurry gasification system according to claim 1, which is characterized in that heating device (10) includes
Coil pipe heat tracing part and steam pipeline (15), steam pipeline (15) are connect with coil pipe heat tracing part, the coil pipe heat tracing part setting
In on the outer wall of coal slurry delivery pipe (8).
8. a kind of low energy consumption coal water slurry gasification system according to claim 6 or 7, which is characterized in that the heating device
(10) steam inlet end is provided with temperature control valve (TCV) (16), and steam trap (17) are additionally provided on heating device (10).
9. a kind of low energy consumption coal water slurry gasification system according to claim 8, which is characterized in that the coal slurry delivery pipe
(8) the water-coal-slurry temperature in is 190 DEG C.
10. the method for a kind of heating water-coal-slurry of system described in any claim according to claim 1~9, including introduce
Low-pressure steam utilizes the water-coal-slurry in low-pressure steam heating coal slurry delivery pipe；Detect the temperature of water-coal-slurry in coal slurry delivery pipe；Control
The intake of low-pressure steam processed；When water-coal-slurry temperature is lower than 185 DEG C, increase the intake of low-pressure steam, so that coal slurry conveys
The temperature of water-coal-slurry maintains in the range of 180 DEG C~200 DEG C in pipe.
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