CN107937035B - Pulverized coal pressurized gasification device and method with two sections of double-circulation fluidized bed coupled - Google Patents
Pulverized coal pressurized gasification device and method with two sections of double-circulation fluidized bed coupled Download PDFInfo
- Publication number
- CN107937035B CN107937035B CN201711236864.3A CN201711236864A CN107937035B CN 107937035 B CN107937035 B CN 107937035B CN 201711236864 A CN201711236864 A CN 201711236864A CN 107937035 B CN107937035 B CN 107937035B
- Authority
- CN
- China
- Prior art keywords
- gas
- stage reactor
- pulverized coal
- reactor
- sections
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/54—Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
- C10J3/56—Apparatus; Plants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/721—Multistage gasification, e.g. plural parallel or serial gasification stages
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/80—Other features with arrangements for preheating the blast or the water vapour
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2200/00—Details of gasification apparatus
- C10J2200/15—Details of feeding means
- C10J2200/152—Nozzles or lances for introducing gas, liquids or suspensions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
- C10J2300/0936—Coal fines for producing producer gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0959—Oxygen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0973—Water
- C10J2300/0976—Water as steam
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
- C10J2300/1807—Recycle loops, e.g. gas, solids, heating medium, water
Abstract
A pulverized coal pressurized gasification device and method of two-section coupling of a double-circulation fluidized bed belong to the technical field of coal gasification, and are characterized in that: comprises a first-stage reactor and a second-stage reactor; the primary reactor comprises a reaction system, a carbonaceous material recovery system and a return conveying system which are connected end to end; the secondary reactor comprises a secondary reaction system, a fine ash collecting device and a return conveying system which are connected end to end; the first-stage reactor is connected with the second-stage reactor through a pipeline. The improved device has high solid circulation rate and gas speed, high device processing capacity, sufficient heat exchange of reaction medium, high heat exchange efficiency and small integral temperature difference of the circulating fluidized bed; the coal variety application range is wide, and the low-rank coal is expanded to medium-rank and high-rank coal with rich reserves in China; the content of effective gas components in the gas and the conversion rate of carbon are improved, and the generated synthesis gas does not contain any tar, so that the subsequent gas purification is relatively simple.
Description
Technical Field
The invention belongs to the technical field of coal gasification, and particularly relates to a pulverized coal pressurized gasification device and method with two sections of double-circulation fluidized beds coupled.
Background
The Chinese resource endowment is that coal has more oil gas and less gas, and coal plays an important role in the economic development of China, but the extensive utilization mode also has a plurality of negative effects. Coal gasification is an important technology for coal conversion and utilization, but the existing coal chemical technology has limited coal variety applicability and can not better solve the problems of large-scale, clean and high efficiency. At present, the domestic medium and high rank coals have larger reserves, and the gasification technology only suitable for low rank coals is how to solve the defects of low carbon conversion rate, high methane content in the synthetic gas and coal tar content in medium and high rank coals, and the key problems are to improve the treatment capacity and reduce the energy consumption.
The circulating fluidized bed reactor has good adaptability to brown coal with high volatile, large specific surface area and good activity and low deterioration degree, but has the fatal defects of high tar, methane and dust particle content, low carbon conversion rate and the like for gasification of other coal grades in China, so that the wide popularization and application of the circulating fluidized bed are limited.
Disclosure of Invention
The invention aims to provide a pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds, which improves the application range of coal types, is suitable for brown coal and low-metamorphic bituminous coal accounting for 55% of the total amount of coal in China, has the advantages of large treatment capacity, high heat transfer efficiency and high carbon conversion rate, and the obtained synthetic gas has high content of effective gas components, low tar and methane content and no black water.
The invention relates to a pulverized coal pressurized gasification device with two sections of coupled dual-circulation fluidized beds, which comprises a first-section reactor and a second-section reactor; the primary reactor comprises a reaction system, a carbonaceous material recovery system and a return conveying system which are connected end to end; the secondary reactor comprises a secondary reaction system, a fine ash collecting device and a return conveying system which are connected end to end; the first-stage reactor is connected with the second-stage reactor through a pipeline.
The invention relates to a pulverized coal pressurized gasification device with two sections of double circulating fluidized beds coupled, wherein a reaction system comprises a riser; the lower end of the lifting pipe is sequentially provided with a pulverized coal feeding inlet, a main gasifying agent inlet, a fluidizing gas control device, a flue gas preheating inlet and an ash discharge port; the carbonaceous material recovery system comprises a secondary cyclone separator, a primary cyclone separator and a circulating seal tank which are sequentially connected; the lower end of the primary cyclone separator is provided with a loosening gas control device;
the return conveying system comprises a vertical pipe; the side wall of the vertical pipe is connected with a vertical pipe material level monitoring device; the lower end of the vertical pipe is provided with a parking discharge opening; the upper end of the circulating sealing tank is provided with a bed material adding device;
the upper end of the lifting pipe is connected with the primary cyclone separator, and the lower end of the lifting pipe is connected with the vertical pipe through a material returning leg; the circulating sealing tank is connected with the vertical pipe; a material returning and conveying gas control device is arranged between the vertical pipe and the material returning leg.
The invention relates to a pulverized coal pressurized gasification device with two sections of double circulating fluidized beds coupled, wherein a secondary reaction system comprises a reaction zone, an auxiliary gasifying agent inlet and a speed increasing zone which are sequentially arranged; the feed back conveying system comprises a bed material supplementing device, a vertical dipleg and a feed back circulating seal tank which are sequentially arranged; one side of the vertical dipleg is provided with a vertical dipleg material level monitoring device; and a return material conveying air control device is arranged between the vertical dipleg and the return material circulating sealing tank.
According to the pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds, the flue gas preheating inlet is positioned below the connecting port of the material returning leg and the lifting pipe, so that sand circulating by the material returning leg can be fully preheated and fluidized conveniently.
According to the pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds, the main gasifying agent inlet comprises three areas, each area comprises a plurality of evenly arranged branches and is connected with the lifting pipe, and uneven gasifying agent distribution and local peroxy are avoided.
The two-section coupled pulverized coal pressurized gasification device of the double-circulation fluidized bed provided by the invention is characterized in that the secondary cyclone separator is connected with the speed increasing zone through a pipeline with a refractory castable lining.
The invention relates to a pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds, wherein the filling materials used by a bed material adding device and a bed material supplementing device are one or more of coal ash, quartz sand and sand, and the grain size range is 80-160 mu m.
According to the pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds, the inner walls of the first-section reactor and the second-section reactor are respectively provided with a refractory heat insulation lining layer, so that heat loss is reduced.
The invention relates to a pulverized coal pressurized gasification method with two sections of coupled dual-circulation fluidized beds, which comprises the following steps:
(1) Loose gas establishment: the fluidized gas control device, the loosening gas control device, the returning material conveying gas control device and the returning material conveying gas control device are used for respectively establishing loosening gas for the first-stage reactor and the second-stage reactor, controlling the loosening gas quantity and ensuring that the gas flow rate of each loosening gas nozzle is 1.2-1.5m/s;
(2) Establishing the material level of a bed layer: the solid materials are respectively added into the first-stage reactor and the second-stage reactor through the bed material adding device and the bed material supplementing device, and the materials flow into the lifting pipe and the accelerating area from the vertical material leg through loosening of loose gas and the self gravity action of the materials;
(3) And (3) establishing cold circulating fluidization: filling fluidizing gas into the first-stage reactor through a fluidizing gas control device, and controlling the gas speed in the vertical pipe to be 4-8m/s;
(4) Preheating a reaction device: providing heat-carrying flue gas for the first-stage reactor through a flue gas preheating inlet, exchanging heat between the circulating fluidized solid materials and the first-stage reactor, heating the whole reactor device, preheating the second-stage reactor through the flue gas at the outlet of the second-stage cyclone separator, and heating the first-stage reactor device to about 980 ℃;
(5) And (3) feeding reaction: feeding pulverized coal into the primary reactor through a pulverized coal feed inlet in a range of 0.93 to 1.42 (kg/Nm) of steam/oxygen 3 ) After being mixed in proportion, the mixture enters a reaction system through a main gasifying agent inlet and is subjected to oxidation-reduction reaction with coal dust, so that carbon in the coal dust is converted into crude synthesis gas mainly containing hydrogen and carbon monoxide;
(6) And (3) supplementing gasifying agent of the two-stage reactor: steam/oxygen in the range of 0.6-1.5 (kg/Nm) 3 ) Is mixed in proportion and then enters into the speed increasing zone through the auxiliary gasifying agent inlet and is discharged from the first-stage reactorThe raw synthesis gas of (2) is rapidly mixed, the supplementary gasifying agent in the reaction zone and unreacted residual carbon, tar and methane carried in the raw synthesis gas are subjected to secondary gasification reaction, and the temperature of the secondary reactor device is controlled to be 1050-1100 ℃.
The invention relates to a pulverized coal pressurized gasification method of two-section coupling of a double-circulation fluidized bed, wherein the raw material of the pulverized coal in the step (5) is lignite, bituminous coal or anthracite; any one of the raw materials is selected as the raw material, so that the application range of the coal is effectively widened.
The pulverized coal pressurized gasification device and method for two-section coupling of the double-circulation fluidized bed have the beneficial effects that:
(1) The solid circulation rate and the gas speed are high, the processing capacity of the device is high, the heat exchange of the reaction medium is sufficient, the heat exchange efficiency is high, and the integral temperature difference of the circulating fluidized bed is small;
(2) The coal variety application range is wide, and the low-rank coal is expanded to medium-rank and high-rank coal with rich reserves in China;
(3) The coupling technology of the two-stage reactor improves the reaction temperature, deep cracking is carried out on tar and residual carbon in the crude gas, the content of effective gas components in the gas and the carbon conversion rate are improved, and the generated synthesis gas does not contain any tar, so that the subsequent gas purification is relatively simple;
(4) The whole gasification reaction process adopts a dry powder coal gas force conveying feeding mode, ash discharge adopts a high-temperature ash cooling and continuous decompression solid state discharge mode, and no wastewater is discharged in the whole reaction process, so that the generation of black water is thoroughly eliminated, and the water consumption of the device is effectively reduced;
(5) The first-stage reactor equipment and the second-stage reactor equipment have simple structures, no inner parts, moving parts and expansion joints, effectively save equipment investment cost and do not need additional slag melting treatment and cleaning equipment.
Drawings
FIG. 1 is a schematic flow diagram of a pulverized coal pressurized gasification device with two sections of coupled dual-circulation fluidized beds;
wherein: a-first-stage reactor, B-second-stage reactor, 1-reaction system, 2-carbonaceous material recovery system, 3-return feed delivery system, 4-secondary reaction system, 5-fine ash capture device, 6-return feed delivery system, 7-conduit, 11-pulverized coal feed inlet, 12-primary gasification agent inlet, 13-fluidization gas control device, 14-riser, 15-ash discharge port, 16-flue gas preheating inlet, 21-primary cyclone, 22-secondary cyclone, 23-circulation seal tank, 24-loose gas control device, 31-riser, 32-riser level monitoring device, 33-return feed delivery gas control device, 34-bed feed addition device, 35-return leg, 36-parking discharge port, 41-acceleration rate zone, 42-reaction zone, 43-auxiliary gasification agent inlet, 61-vertical feed leg, 62-vertical feed leg level monitoring device, 63-bed feed supplement device, 64-return circulation seal tank, 65-return feed delivery gas control device.
Detailed Description
The invention relates to a pulverized coal pressurized gasification device and a pulverized coal pressurized gasification method with two sections of double circulating fluidized beds coupled by adopting the device and the method, which are described in detail below with reference to the accompanying drawings and the embodiment.
The invention relates to a pulverized coal pressurized gasification device with two sections of double-circulation fluidized beds coupled, which is shown in figure 1 and comprises a first-section reactor (A) and a second-section reactor (B); the primary reactor (A) comprises a reaction system (1), a carbon-containing material recovery system (2) and a return conveying system (3) which are connected end to end; the secondary reactor (B) comprises a secondary reaction system (4), a fine ash collecting device (5) and a return conveying system (6) which are connected end to end; the first-stage reactor (A) and the second-stage reactor (B) are connected through a pipeline (7).
The invention relates to a pulverized coal pressurized gasification device with two sections of double circulating fluidized beds coupled, wherein a reaction system (1) comprises a riser (14); the lower end of the lifting pipe (14) is sequentially provided with a pulverized coal feeding inlet (11), a main gasifying agent inlet (12), a fluidization gas control device (13), a flue gas preheating inlet (16) and an ash discharge port (15); the carbon-containing material recovery system (2) comprises a secondary cyclone separator (22), a primary cyclone separator (21) and a circulating seal tank (23) which are connected in sequence; the lower end of the primary cyclone separator (21) is provided with a loosening air control device (24); the return conveying system (3) comprises a vertical pipe (31); a vertical pipe material level monitoring device (32) is connected to the side wall of the vertical pipe (31); a parking discharge opening (36) is formed in the lower end of the vertical pipe (31); the upper end of the circulating seal tank is provided with a bed material adding device (34); the upper end of the lifting pipe (14) is connected with the primary cyclone separator (21), and the lower end of the lifting pipe is connected with the vertical pipe (31) through a material returning leg (35); the circulating seal tank (23) is connected with the vertical pipe (31); a material returning and conveying gas control device (33) is arranged between the vertical pipe (31) and the material returning leg (35). The secondary reaction system (4) comprises a reaction zone (42), an auxiliary gasifying agent inlet (43) and a speed-increasing zone (41) which are sequentially arranged; the feed back conveying system (6) comprises a bed material supplementing device (63), a vertical dipleg (61) and a feed back circulating seal tank (64) which are sequentially arranged; one side of the vertical dipleg (61) is provided with a vertical dipleg material level monitoring device (62); a return material conveying air control device (65) is arranged between the vertical dipleg (61) and the return material circulating seal tank (64).
The invention relates to a pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds, wherein a flue gas preheating inlet (16) is positioned below a connecting port of a return leg (35) and a lifting pipe (14).
The invention relates to a pulverized coal pressurized gasification device with two sections of double circulating fluidized beds, wherein a main gasifying agent inlet (12) comprises three areas, wherein the upper area comprises 6 branches, the middle area comprises 18 branches, the lower area comprises 1 branch, and each branch is connected with a lifting pipe (14).
The invention relates to a pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds, wherein a secondary cyclone separator (22) is connected with a speed increasing zone (41) through a pipeline (7) with a refractory castable lining.
The invention relates to a pulverized coal pressurized gasification device with two sections of double circulating fluidized beds, wherein the filler used by a bed material adding device (34) and a bed material supplementing device (63) is one or more of coal ash, quartz sand and sand, and the particle size range is 80-160 mu m.
The invention relates to a pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds, wherein the inner walls of a first-section reactor (A) and a second-section reactor (B) are respectively provided with a refractory heat-insulating lining layer.
The invention relates to a pulverized coal pressurized gasification method with two sections of coupled double circulating fluidized beds, wherein the raw materials of the pulverized coal adopt anthracite; the method comprises the following steps:
(1) Loose gas establishment: the fluidized gas control device (13), the loosening gas control device (24), the returning material conveying gas control device (33) and the returning material conveying gas control device (65) respectively establish loosening gas for the first-stage reactor (A) and the second-stage reactor (B), and the loosening gas quantity is controlled to ensure that the gas flow rate of each loosening gas nozzle is 1.2-1.5m/s;
(2) Establishing the material level of a bed layer: solid materials are respectively added into the first-stage reactor (A) and the second-stage reactor (B) through a bed material adding device (34) and a bed material supplementing device (63), and the materials flow into the riser (14) and the accelerating area (41) from the riser (31) and the vertical dipleg (61) under the loosening of loose gas and the self gravity action of the materials;
(3) And (3) establishing cold circulating fluidization: supplementing fluidizing gas into the first-stage reactor (A) through a fluidizing gas control device (13), and controlling the gas speed in the vertical pipe (31) to be 4-8m/s;
(4) Preheating a reaction device: the heat-carrying flue gas is provided for the first-stage reactor (A) through a flue gas preheating inlet (16), the circulating fluidized solid materials exchange heat with the flue gas, the whole reactor device is heated, the flue gas of the second-stage reactor (B) through the outlet of the second-stage cyclone separator (22) is preheated, and the temperature of the first-stage reactor (A) device is raised to about 980 ℃;
(5) And (3) feeding reaction: pulverized coal is fed into the primary reactor (A) through a pulverized coal feed inlet (11) in a range of 0.93 to 1.42 (kg/Nm) of steam/oxygen 3 ) After being mixed in proportion, the mixture enters a reaction system (1) through a main gasifying agent inlet (12) to undergo oxidation-reduction reaction with coal dust, so that carbon in the coal dust is converted into crude synthesis gas mainly containing hydrogen and carbon monoxide;
(6) And (3) supplementing gasifying agent of the two-stage reactor: steam/oxygen in the range of 0.6-1.5 (kg/Nm) 3 ) Enters the accelerating zone (41) through the auxiliary gasifying agent inlet (43) after being mixed in proportion, is quickly mixed with the crude synthetic gas from the outlet of the first-stage reactor (A), and carries out secondary gasification reaction on the supplemented gasifying agent in the reaction zone (42) and unreacted residual carbon, tar and methane components carried in the crude synthetic gas, and the temperature of the second-stage reactor (B) device is controlled at 1050-1100 ℃.
Claims (7)
1. A pulverized coal pressurized gasification device with two sections of coupled dual-circulation fluidized beds is characterized in that: comprises a first-stage reactor (A) and a second-stage reactor (B); the primary reactor (A) comprises a reaction system (1), a carbon-containing material recovery system (2) and a return conveying system (3) which are connected end to end; the secondary reactor (B) comprises a secondary reaction system (4), a fine ash collecting device (5) and a return conveying system (6) which are connected end to end; the first-stage reactor (A) and the second-stage reactor (B) are connected through a pipeline (7);
the reaction system (1) comprises a riser (14); the lower end of the lifting pipe (14) is sequentially provided with a pulverized coal feeding inlet (11), a main gasifying agent inlet (12), a fluidization gas control device (13), a flue gas preheating inlet (16) and an ash discharge port (15); the carbon-containing material recovery system (2) comprises a secondary cyclone separator (22), a primary cyclone separator (21) and a circulating seal tank (23) which are connected in sequence; the lower end of the primary cyclone separator (21) is provided with a loosening air control device (24);
the return conveying system (3) comprises a vertical pipe (31); a vertical pipe material level monitoring device (32) is connected to the side wall of the vertical pipe (31); a parking discharge opening (36) is formed in the lower end of the vertical pipe (31); the upper end of the circulating seal tank is provided with a bed material adding device (34);
the upper end of the lifting pipe (14) is connected with the primary cyclone separator (21), and the lower end of the lifting pipe is connected with the vertical pipe (31) through a material returning leg (35); the circulating seal tank (23) is connected with the vertical pipe (31); a material returning and conveying gas control device (33) is arranged between the vertical pipe (31) and the material returning leg (35);
the secondary reaction system (4) comprises a reaction zone (42), an auxiliary gasifying agent inlet (43) and a speed-increasing zone (41) which are sequentially arranged; the feed back conveying system (6) comprises a bed material supplementing device (63), a vertical dipleg (61) and a feed back circulating seal tank (64) which are sequentially arranged; one side of the vertical dipleg (61) is provided with a vertical dipleg material level monitoring device (62); a return material conveying air control device (65) is arranged between the vertical dipleg (61) and the return material circulating seal tank (64);
the gasification method of the pulverized coal pressurized gasification device according to the two-section coupling of the double-circulation fluidized bed comprises the following steps:
(1) Loose gas establishment: the fluidized gas control device (13), the loosening gas control device (24), the returning material conveying gas control device (33) and the returning material conveying gas control device (65) respectively establish loosening gas for the first-stage reactor (A) and the second-stage reactor (B), and the loosening gas quantity is controlled to ensure that the gas flow rate of each loosening gas nozzle is 1.2-1.5m/s;
(2) Establishing the material level of a bed layer: solid materials are respectively added into the first-stage reactor (A) and the second-stage reactor (B) through a bed material adding device (34) and a bed material supplementing device (63), and the materials flow into the riser (14) and the accelerating area (41) from the riser (31) and the vertical dipleg (61) under the loosening of loose gas and the self gravity action of the materials;
(3) And (3) establishing cold circulating fluidization: supplementing fluidizing gas into the first-stage reactor (A) through a fluidizing gas control device (13), and controlling the gas speed in the vertical pipe (31) to be 4-8m/s;
(4) Preheating a reaction device: providing heat-carrying flue gas for a first-stage reactor (A) through a flue gas preheating inlet (16), exchanging heat between circulating fluidized solid materials and the first-stage reactor, heating the whole reactor device, preheating flue gas of a second-stage reactor (B) through an outlet of a second-stage cyclone separator (22), and heating the temperature of the first-stage reactor (A) to 980 ℃;
(5) And (3) feeding reaction: pulverized coal is fed into the primary reactor (A) through a pulverized coal feed inlet (11) in a range of 0.93 to 1.42 (kg/Nm) of steam/oxygen 3 ) After being mixed in proportion, the mixture enters a reaction system (1) through a main gasifying agent inlet (12) to undergo oxidation-reduction reaction with coal dust, so that carbon in the coal dust is converted into crude synthesis gas mainly containing hydrogen and carbon monoxide;
(6) And (3) supplementing gasifying agent of the two-stage reactor: steam/oxygen in the range of 0.6-1.5 (kg/Nm) 3 ) Enters the accelerating zone (41) through the auxiliary gasifying agent inlet (43) after being mixed in proportion, is quickly mixed with the crude synthetic gas from the outlet of the first-stage reactor (A), and carries out secondary gasification reaction on the supplemented gasifying agent in the reaction zone (42) and unreacted residual carbon, tar and methane components carried in the crude synthetic gas, and the temperature of the second-stage reactor (B) device is controlled at 1050-1100 ℃.
2. The pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds according to claim 1, wherein the device is characterized in that: the flue gas preheating inlet (16) is positioned below a connecting port of the material returning leg (35) and the lifting pipe (14).
3. The pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds according to claim 2, wherein: the main gasifying agent inlet (12) comprises three areas, and each area comprises a plurality of evenly arranged branches and is connected with the lifting pipe (14).
4. A dual circulating fluidized bed two-stage coupled pulverized coal pressurized gasification apparatus according to claim 1 or 3, wherein: the secondary cyclone separator (22) is connected with the accelerating area (41) through a pipeline (7) with a refractory castable lining.
5. The pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds according to claim 4, wherein: the filling materials used by the bed material adding device (34) and the bed material supplementing device (63) are one or more of coal ash, quartz sand and sand, and the grain size range is 80-160 mu m.
6. The pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds according to claim 5, wherein: the inner walls of the first-stage reactor (A) and the second-stage reactor (B) are respectively provided with a fireproof heat insulation lining layer.
7. The pulverized coal pressurized gasification device with two sections of coupled double circulating fluidized beds according to claim 6, wherein: the raw material of the pulverized coal in the step (5) is lignite, bituminous coal or anthracite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711236864.3A CN107937035B (en) | 2017-11-30 | 2017-11-30 | Pulverized coal pressurized gasification device and method with two sections of double-circulation fluidized bed coupled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711236864.3A CN107937035B (en) | 2017-11-30 | 2017-11-30 | Pulverized coal pressurized gasification device and method with two sections of double-circulation fluidized bed coupled |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107937035A CN107937035A (en) | 2018-04-20 |
| CN107937035B true CN107937035B (en) | 2023-09-26 |
Family
ID=61946924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711236864.3A Active CN107937035B (en) | 2017-11-30 | 2017-11-30 | Pulverized coal pressurized gasification device and method with two sections of double-circulation fluidized bed coupled |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107937035B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109749786A (en) * | 2019-02-16 | 2019-05-14 | 洛阳瑞华新能源技术发展有限公司 | The centre gasification ciculation fluidized bed gasification method of gas tandem conversion type fine particles containing carbon |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0634470A1 (en) * | 1993-07-12 | 1995-01-18 | M. W. Kellogg Company | Transport gasifier |
| JP2005207643A (en) * | 2004-01-21 | 2005-08-04 | Jfe Engineering Kk | Circulating fluidized-bed furnace and its operation method |
| CN101942344A (en) * | 2010-09-20 | 2011-01-12 | 中国科学院山西煤炭化学研究所 | Method and device for gasifying multi-segment staged converted fluidized bed |
| CN102313283A (en) * | 2011-08-30 | 2012-01-11 | 东南大学 | Coal chemical looping combustion method by using pressurized two-circuit circulating fluidized bed |
| CN103764802A (en) * | 2011-04-21 | 2014-04-30 | 凯洛格·布朗及鲁特有限公司 | Systems and methods for operating a gasifier |
| CN103820170A (en) * | 2014-02-21 | 2014-05-28 | 陕西延长石油（集团）有限责任公司碳氢高效利用技术研究中心 | Apparatus for converting tar component and carbonaceous particles in raw gas, and method thereof |
| CN207552262U (en) * | 2017-11-30 | 2018-06-29 | 陕西延长石油（集团）有限责任公司 | A kind of powdered coal pressuring gasified device of double-circulating fluid bed two sections of couplings |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8961629B2 (en) * | 2009-12-21 | 2015-02-24 | Southern Company Services, Inc. | Apparatus, components and operating methods for circulating fluidized bed transport gasifiers and reactors |
-
2017
- 2017-11-30 CN CN201711236864.3A patent/CN107937035B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0634470A1 (en) * | 1993-07-12 | 1995-01-18 | M. W. Kellogg Company | Transport gasifier |
| JP2005207643A (en) * | 2004-01-21 | 2005-08-04 | Jfe Engineering Kk | Circulating fluidized-bed furnace and its operation method |
| CN101942344A (en) * | 2010-09-20 | 2011-01-12 | 中国科学院山西煤炭化学研究所 | Method and device for gasifying multi-segment staged converted fluidized bed |
| CN103764802A (en) * | 2011-04-21 | 2014-04-30 | 凯洛格·布朗及鲁特有限公司 | Systems and methods for operating a gasifier |
| CN102313283A (en) * | 2011-08-30 | 2012-01-11 | 东南大学 | Coal chemical looping combustion method by using pressurized two-circuit circulating fluidized bed |
| CN103820170A (en) * | 2014-02-21 | 2014-05-28 | 陕西延长石油（集团）有限责任公司碳氢高效利用技术研究中心 | Apparatus for converting tar component and carbonaceous particles in raw gas, and method thereof |
| CN207552262U (en) * | 2017-11-30 | 2018-06-29 | 陕西延长石油（集团）有限责任公司 | A kind of powdered coal pressuring gasified device of double-circulating fluid bed two sections of couplings |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107937035A (en) | 2018-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101245264B (en) | Single-bed self-heating type thermal decomposition gasification combustion reactor and thermal decomposition gasification combustion method | |
| CN101781583B (en) | Method and device for utilizing high value through pyrolysis and gasification of coal | |
| CN101613615B (en) | Method and system for decoupling and upgrading coal | |
| CN103160299B (en) | Fluidized bed low-temperature destructive distillation system and low-temperature destructive distillation method of low-rank coal | |
| CN105176589B (en) | Coke fixed bed pressurization gasification device and process | |
| CN102358840B (en) | Single-stage fine coal multi-pipe rotary low-temperature destructive distillation technology and system | |
| CN106675658B (en) | High-flux circulating fluidized bed low-order coal gasification device and method | |
| CN102277200A (en) | Method for preparing coal gas by virtue of pulverized coal grading gasification | |
| CN103897743A (en) | Solid fuel grading gasification-combustion double-bed poly-generation system and method | |
| CN103361087A (en) | Pyrolysis and combustion coupled circular reaction method and device | |
| CN105885950B (en) | A kind of three combination pyrolytic gasifications of solid waste and coke tar cracking integral system | |
| CN202558825U (en) | Jacket type internal circulating fluidized bed powder coal gasification furnace | |
| CN105273764B (en) | Coal gasification apparatus and gasification process | |
| CN107760377A (en) | Fluid bed and fixed bed combined type catalytic coal gasification devices and methods therefor | |
| CN104152164A (en) | Gas cycle coal full-particle diameter grading and pyrolyzing technology and system thereof | |
| CN103571510B (en) | Powder coal dry distillation method and device | |
| CN101289622B (en) | Process for upgrading of bovey coal by solid thermal-loading suspending pyrogenation device of bovey coal | |
| CN207552262U (en) | A kind of powdered coal pressuring gasified device of double-circulating fluid bed two sections of couplings | |
| CN105018154B (en) | Biomass double fluidized-bed indirect gasification system and its control method | |
| CN107937035B (en) | Pulverized coal pressurized gasification device and method with two sections of double-circulation fluidized bed coupled | |
| KR102032823B1 (en) | Circulating Fluidized Bed Gasifier Equipped with Heat Exchanger Therein | |
| CN205740916U (en) | A kind of double bed coupling pyrolysis gasification system directly or indirectly adding thermal | |
| CN205295251U (en) | Two sections pyrolysis gasification system of solid waste | |
| CN205740917U (en) | A kind of solid waste three combination pyrolytic gasification and coke tar cracking integral system | |
| CN108504389A (en) | A kind of carbon-based fuel burning chemistry chains gasification coupling device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |