CN218146508U - Novel fine coal hydrogenation gasification furnace - Google Patents
Novel fine coal hydrogenation gasification furnace Download PDFInfo
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- CN218146508U CN218146508U CN202222426887.3U CN202222426887U CN218146508U CN 218146508 U CN218146508 U CN 218146508U CN 202222426887 U CN202222426887 U CN 202222426887U CN 218146508 U CN218146508 U CN 218146508U
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Abstract
The utility model discloses a novel pulverized coal hydrogenation gasification furnace, which comprises a closed furnace body, a reducing discharger and a gas-solid separation device, wherein a waste heat boiler is arranged in the middle of the inner cavity of the closed furnace body, the inner cavity of the closed furnace body above the waste heat boiler is a gasification reaction chamber, and the inner cavity of the closed furnace body below the waste heat boiler is a semicoke storage chamber; the reducing discharger is arranged on the hearth opening of the waste heat boiler, and the gas-solid separation device is arranged at the discharge opening of the reducing discharger. Has the advantages that: high-temperature coal gas generated by gasification reaction and semicoke form a gas-solid mixture, and heat exchange and temperature reduction are carried out by a waste heat boiler, so that the recycling of heat energy carried by high-temperature synthesis gas and high-temperature semicoke is realized, the introduction of impurity gas is avoided in the temperature reduction process, and the workload of a synthesis gas purifying device is reduced; the gas-solid separation device is arranged and the arc-shaped guide plate is arranged in the gas-solid separation device, so that the separation effect of the synthesis gas and the semicoke is effectively improved.
Description
The technical field is as follows:
the utility model belongs to the technical field of coal gasification, concretely relates to novel fine coal hydrogenation gasification stove.
Background art:
hydro-gasification refers to a process in which a carbon-containing compound reacts with hydrogen at medium temperature (700-1000 ℃) and high pressure (5-10 MPa) to generate crude gas rich in methane, high value-added aromatic oil and high value semicoke.
In the existing hydro-gasification furnace, external synthesis gas is introduced into the gasification furnace to cool the high-temperature semicoke and the high-temperature synthesis gas, so that the heat energy carried by the high-temperature semicoke and the high-temperature synthesis gas can not be utilized, and the energy waste is caused. In addition, as the main components of the external synthesis gas are carbon monoxide and hydrogen, when the external synthesis gas enters the hydro-gasification furnace, the carbon monoxide is mixed into the synthesis gas in the hydro-gasification furnace, the hydrogen purity of the synthesis gas in the whole hydro-gasification furnace is influenced, the forward reaction efficiency in the gasification furnace is influenced, and in the subsequent purification process of the synthesis gas, a carbon monoxide removing device needs to be additionally arranged, so that the equipment cost is increased.
The gas-solid separation of the semicoke and the synthetic gas in the hydro-gasification furnace is carried out in a mode of self gravity sedimentation of the semicoke, and the semicoke obtained by hydro-gasification has the characteristics of loose texture, fine particles and small density, so that the gas-solid separation effect is poor, a large amount of semicoke is entrained by the synthetic gas to enter a rear system, the workload of the rear system is increased, and the failure of a subsequent ash removal system can be caused by long-period operation.
The utility model has the following contents:
an object of the utility model is to provide a novel fine coal hydrogenation gasification stove.
The utility model discloses by following technical scheme implement: a novel pulverized coal hydrogenation gasification furnace comprises a closed furnace body, wherein a waste heat boiler is arranged in the middle of the inner cavity of the closed furnace body; the inner cavity of the closed furnace body above the waste heat boiler is a gasification reaction chamber, and the inner cavity of the closed furnace body below the waste heat boiler is a semicoke storage chamber; the hearth of the waste heat boiler is communicated with the gasification reaction chamber and the semicoke storage chamber;
the top of the gasification reaction chamber is provided with a nozzle which is respectively communicated with a high-temperature hydrogen gas source, an oxygen gas source and a pulverized coal bin; the bottom of the semicoke storage chamber is provided with a semicoke discharging port;
the heat exchange medium inlet of the waste heat boiler is communicated with a water supply pipe network of the high-pressure boiler through a pipeline; the heat exchange medium outlet of the waste heat boiler is communicated with the steam pipe network through a pipeline;
a reducing discharger is arranged on a hearth opening of the waste heat boiler communicated with the semicoke storage chamber; the discharge hole of the reducing discharger is arranged upwards; a gas-solid separation device is arranged at a discharge port of the reducing discharger, and the discharge port of the reducing discharger is communicated with a separation bin feed inlet of the gas-solid separation device;
the gasification reaction chamber is arranged at the top of the gasification furnace, the high-temperature coal gas and the semicoke generated by the reaction form a gas-solid mixture, and the gas-solid mixture is subjected to heat exchange and cooling by the waste heat boiler, so that the recycling of heat energy carried by the high-temperature synthesis gas and the high-temperature semicoke is realized, the introduction of impurity gas is avoided in the cooling process, and the workload of a subsequent synthesis gas purifying device is reduced.
The gas-solid separation device comprises a gas-solid separation bin and a synthetic gas pipe;
the bottom of the gas-solid separation bin is provided with a separation bin feed inlet and a separation bin discharge outlet, and the synthesis gas pipe horizontally penetrates through the side wall of the gas-solid separation bin between the separation bin feed inlet and the separation bin discharge outlet;
the wall of the synthesis gas pipe in the gas-solid separation bin is uniformly provided with gas inlets; and two ends of the synthesis gas pipe penetrate through the outer wall of the closed furnace body and are arranged on the outer side of the closed furnace body.
Preferably, the reducing discharger comprises an open end and a hearth opening of the waste heat boiler, the feed hopper and the U-shaped discharge pipe are communicated, one end of the U-shaped discharge pipe is communicated with a reducing end of the feed hopper, and the other end of the U-shaped discharge pipe is a discharge hole of the reducing discharger and is arranged upwards.
Preferably, the reducing discharging device comprises a feeding hopper, a discharging pipe and a U-shaped discharging pipe, wherein the open end of the feeding hopper is communicated with a hearth opening of the waste heat boiler; the U-shaped discharge pipe effectively reduces the resistance of the synthesis gas to convey the semicoke, and is favorable for smooth and easy conveying of materials. One end of the vertically arranged blanking pipe is communicated with the necking end of the feeding hopper, and the other end of the blanking pipe is provided with a blocking plate; more than two U-shaped discharge pipes are uniformly distributed on the pipe wall of the discharge pipe along the circumference; the even distribution of U-shaped discharging pipe makes the distribution of synthetic gas more even, and then improves the efficiency that the semicoke was carried.
One end of each U-shaped discharge pipe is communicated with the discharge pipe, and the other end of each U-shaped discharge pipe is a discharge hole of the variable-diameter discharger which is arranged upwards.
Preferably, the discharge hole of the reducing discharger is communicated with the feed hole of the separation bin through a feeding reducing pipe; the open end of the feeding reducing pipe is communicated with the discharge hole of the reducing discharger, and the reducing end of the feeding reducing pipe is communicated with the feed inlet of the separation bin. Through setting up feeding reducing pipe, can accelerate the synthetic gas and promote the speed that the semicoke got into gas-solid separation device, and then improve the gas-solid separation effect.
Preferably, be equipped with the ejection of compact reducing pipe of vertical setting on the separation bin discharge gate, the open end of ejection of compact reducing pipe with separation bin discharge gate intercommunication the vertical blanking pipe that is equipped with on the throat end of ejection of compact reducing pipe, the full material is down after ejection of compact reducing pipe received the semicoke for be full of the semicoke in the blanking pipe, can play the material and seal the effect, avoid synthetic gas to get into the semicoke apotheca. The bottom end pipe opening of the blanking pipe and the other end pipe opening of the blanking pipe are positioned on the same horizontal line, so that the blanking pipe can meet the requirement of material sealing effect, and the situation that the blanking pipe extends into a semi-coke layer due to overlong length to affect coke discharge is avoided.
Preferably, an arc-shaped guide plate with a downward opening is arranged in the inner cavity of the gas-solid separation bin above the synthesis gas pipe; the axial direction of the arc-shaped guide plate is parallel to the axial direction of the synthesis gas pipe.
Preferably, the gas inlet is a long hole formed along the axial direction of the synthesis gas pipe.
Through setting up the arc deflector, adopt the mode of lower part feeding and lower part ejection of compact simultaneously for the material gets into the gas-solid separation storehouse along gas-solid separator's tangent plane and forms half circular arc's rotation in the gas-solid separation storehouse, under the effect of centrifugal force, solid semicoke is discharged by separating the storehouse discharge gate along gas-solid separator's inner wall motion, and synthetic gas then gets into synthetic gas pipe discharge gasification stove by rectangular hole, has realized the purpose of gas-solid separation.
The utility model has the advantages that: 1. the gasification reaction chamber is arranged at the top of the gasification furnace, high-temperature coal gas and semicoke generated by reaction form a gas-solid mixture, heat exchange and cooling are carried out by the waste heat boiler, recycling of heat energy carried by high-temperature synthesis gas and high-temperature semicoke is realized, introduction of impurity gas is avoided in the cooling process, the working load of a subsequent synthesis gas purification device is reduced, meanwhile, products of the gasification reaction chamber comprise the synthesis gas and the semicoke, the synthesis gas has a pushing effect on the semicoke, and smooth flowing of the semicoke is favorably ensured; 2. an arc-shaped guide plate is arranged in the gas-solid separation device, and a mode of feeding from the lower part and discharging from the lower part is adopted simultaneously, so that the solid semicoke moves along the inner wall of the gas-solid separation device and is discharged from a discharge hole of the separation bin, and the synthesis gas enters a synthesis gas pipeline from the strip hole and is discharged out of the gasification furnace, thereby realizing the purpose of gas-solid separation; 3. the feeding reducer pipe is additionally arranged at the feeding port of the separation bin of the gas-solid separation device, so that the speed of the material entering the gas-solid separation device is increased, and the gas-solid separation effect is improved; 4. the discharge reducer pipe is additionally arranged at the discharge outlet of the separation bin of the gas-solid separation device, so that the material sealing effect can be achieved, and the synthetic gas is prevented from entering the semicoke storage chamber.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1: the overall structure of the embodiment 1 is schematically shown;
FIG. 2: the whole structure of the gas-solid separation device in the embodiment 1 is shown schematically;
FIG. 3: example 1 a sectional view of a gas-solid separation apparatus;
FIG. 4: the overall structure of the embodiment 2 is schematically shown;
FIG. 5: the overall structure of the embodiment 3 is shown schematically;
FIG. 6: the overall structure of the gas-solid separation device in the embodiment 2 and the embodiment 3 is schematically shown;
FIG. 7: sectional views of gas-solid separation apparatuses in examples 2 and 3;
in the figure: 1. the device comprises a closed furnace body, 2, a waste heat boiler, 21, a hearth, 22, a heat exchange medium inlet, 23, a heat exchange medium outlet, 3, a gasification reaction chamber, 31, a nozzle, 4, a semicoke storage chamber, 41, a coke discharge port, 5, a high-temperature hydrogen gas source, 6, an oxygen gas source, 7, a pulverized coal bunker, 8, a high-pressure boiler water supply pipe network, 9, a steam pipe network, 10, a reducing discharger, 101, a feeding hopper, 102, a U-shaped discharge pipe, 103, a discharge pipe, 104, a blocking plate, 11, a gas-solid separation device, 111, a gas-solid separation bunker, 112, a synthesis gas pipe, 113, a bunker separation bunker feed port, 114, a separation bunker discharge port, 115, a gas inlet, 116, an arc guide plate, 12, a feeding reducing pipe, 13, a discharge reducing pipe, 14 and a blanking pipe.
The specific implementation mode is as follows:
the principles and features of the present invention are described below, with the examples being given only for the purpose of illustration and not for the purpose of limiting the scope of the invention.
Example 1:
as shown in fig. 1-3, a novel pulverized coal hydrogenation gasification furnace comprises a closed furnace body 1, wherein a waste heat boiler 2 is arranged in the middle of an inner cavity of the closed furnace body 1; the inner cavity of the closed furnace body 1 above the waste heat boiler 2 is a gasification reaction chamber 3, and the inner cavity of the closed furnace body 1 below the waste heat boiler 2 is a semicoke storage chamber 4; a hearth 21 of the waste heat boiler 2 is communicated with the gasification reaction chamber 3 and the semicoke storage chamber 4;
the top of the gasification reaction chamber 3 is provided with a nozzle 31, and the nozzle 31 is respectively communicated with a high-temperature hydrogen gas source 5, an oxygen gas source 6 and a pulverized coal bin 7; the bottom of the semicoke storage chamber 4 is provided with a coke discharge port 41.
The heat exchange medium inlet 22 of the waste heat boiler 2 is communicated with the water supply pipe network 8 of the high-pressure boiler through a pipeline; the heat exchange medium outlet 23 of the waste heat boiler 2 is communicated with the steam pipe network 9 through a pipeline.
The reducing discharger 10 is arranged on the opening of the hearth 21 of the waste heat boiler 2 communicated with the semicoke storage chamber 4, the reducing discharger 10 comprises a feeding hopper 101 and a U-shaped discharge pipe 102, the opening end of the feeding hopper is communicated with the opening 21 of the hearth of the waste heat boiler 2, the U-shaped discharge pipe 102 effectively reduces the resistance of the synthesis gas to convey semicoke, and smooth conveying of materials is facilitated. One end of the U-shaped discharge pipe 102 is communicated with the reducing end of the feeding funnel 101, and the other end of the U-shaped discharge pipe 102 is a discharge hole of the reducing discharger 10 which is arranged upwards. A gas-solid separation device 11 is arranged at the discharge port of the variable diameter discharger 10, and the discharge port of the variable diameter discharger 10 is communicated with a separation bin feed port 113 of the gas-solid separation device 11;
the gas-solid separation device 11 comprises a gas-solid separation bin 111 and a synthetic gas pipe 112;
the bottom of the gas-solid separation bin 111 is provided with a separation bin feed inlet 113 and a separation bin discharge outlet 114, and a synthetic gas pipe 112 horizontally penetrates through the side wall of the gas-solid separation bin 111 between the separation bin feed inlet 113 and the separation bin discharge outlet 114; the wall of the synthesis gas pipe 112 in the gas-solid separation bin 111 is uniformly provided with gas inlets 115; the two ends of the synthesis gas pipe 112 penetrate through the outer wall of the closed furnace body 1 and are arranged outside the closed furnace body 1. The mode of lower part feeding and lower part discharging is adopted, so that the material enters the gas-solid separation bin 111 along the tangent plane of the gas-solid separation device 11 and rotates in the gas-solid separation bin 111, the solid carbocoal moves along the inner wall of the gas-solid separation device 11 under the action of centrifugal force and is discharged from a discharge hole 114 of the separation bin, and the synthetic gas enters the synthetic gas pipe 112 through the strip hole and is discharged out of the gasification furnace, thereby realizing the purpose of gas-solid separation.
Example 2:
as shown in fig. 4,6,7, a novel pulverized coal hydrogenation gasification furnace comprises a closed furnace body 1, wherein a waste heat boiler 2 is arranged in the middle of an inner cavity of the closed furnace body 1; the inner cavity of the closed furnace body 1 above the waste heat boiler 2 is a gasification reaction chamber 3, and the inner cavity of the closed furnace body 1 below the waste heat boiler 2 is a semicoke storage chamber 4; a hearth 21 of the waste heat boiler 2 is communicated with the gasification reaction chamber 3 and the semicoke storage chamber 4;
the top of the gasification reaction chamber 3 is provided with a nozzle 31, and the nozzle 31 is respectively communicated with a high-temperature hydrogen gas source 5, an oxygen gas source 6 and a pulverized coal bin 7; the bottom of the semicoke storage chamber 4 is provided with a coke discharging port 41;
the heat exchange medium inlet 22 of the waste heat boiler 2 is communicated with the water supply pipe network 8 of the high-pressure boiler through a pipeline; the heat exchange medium outlet 23 of the waste heat boiler 2 is communicated with the steam pipe network 9 through a pipeline;
the reducing discharger 10 is arranged on the opening of the hearth 21 of the waste heat boiler 2 communicated with the semicoke storage chamber 4, the reducing discharger 10 comprises a feeding hopper 101 and a U-shaped discharge pipe 102, the opening end of the feeding hopper is communicated with the opening 21 of the hearth of the waste heat boiler 2, the U-shaped discharge pipe 102 effectively reduces the resistance of the synthesis gas to convey semicoke, and smooth conveying of materials is facilitated. One end of the U-shaped discharge pipe 102 is communicated with the necking end of the feeding funnel 101, and the other end of the U-shaped discharge pipe 102 is a discharge hole of the reducing discharger 10 which is arranged upwards. The discharge gate department of reducing discharger 10 is equipped with gas-solid separation device 11, and the discharge gate of reducing discharger 10 and gas-solid separation device 11's separation storehouse feed inlet 113 are through feeding reducing pipe 12 intercommunication, and the open end of feeding reducing pipe 12 and the discharge gate intercommunication of reducing discharger 10, the throat end and the separation storehouse feed inlet 113 intercommunication of feeding reducing pipe 12. By arranging the feeding reducer 12, the speed of the synthesis gas pushing the semicoke to enter the gas-solid separation device 11 can be increased, and the gas-solid separation effect can be further improved.
The gas-solid separation device 11 comprises a gas-solid separation bin 111 and a synthetic gas pipe 112; the bottom of the gas-solid separation bin 111 is provided with a separation bin feed inlet 113 and a separation bin discharge outlet 114, the separation bin discharge outlet 114 is provided with a vertically arranged discharge reducer 13, the open end of the discharge reducer 13 is communicated with the separation bin discharge outlet 114, and the reducing end of the discharge reducer 13 is vertically provided with a blanking pipe 14. The discharging reducer 13 receives the semicoke and then fully feeds the semicoke to move downwards, so that the blanking pipe 14 is fully filled with the semicoke, a material sealing effect can be achieved, and the synthetic gas is prevented from entering the semicoke storage chamber 4.
A synthetic gas pipe 112 horizontally penetrates through the side wall of the gas-solid separation bin 111 between the separation bin feed port 113 and the separation bin discharge port 114, gas inlets 115 are uniformly formed in the pipe wall of the synthetic gas pipe 112 in the gas-solid separation bin 111, and the gas inlets 115 are strip holes formed in the axial direction of the synthetic gas pipe 112; the two ends of the synthesis gas pipe 112 penetrate through the outer wall of the closed furnace body 1 and are arranged outside the closed furnace body 1. An arc-shaped guide plate 116 with a downward opening is arranged in the inner cavity of the gas-solid separation bin 111 above the synthesis gas pipe 112; the arc guide plate 116 is disposed in parallel with the axis of the syngas pipe 112. Through setting up arc deflector 116, adopt the mode of lower part feeding and lower part ejection of compact simultaneously for the material gets into gas-solid separation storehouse 111 and forms half circular arc's rotation in gas-solid separation storehouse 111 along the tangent plane of gas-solid separation device 11, under the effect of centrifugal force, solid semicoke is discharged by separation storehouse discharge gate 114 along the inner wall motion of gas-solid separation device 11, and synthetic gas then gets into synthetic gas pipe 112 discharge gasification furnace by rectangular hole, has realized the purpose of gas-solid separation.
Example 3:
as shown in fig. 5-7, a novel pulverized coal hydrogenation gasification furnace comprises a closed furnace body 1, wherein a waste heat boiler 2 is arranged in the middle of an inner cavity of the closed furnace body 1; the inner cavity of the closed furnace body 1 above the waste heat boiler 2 is a gasification reaction chamber 3, and the inner cavity of the closed furnace body 1 below the waste heat boiler 2 is a semicoke storage chamber 4; a hearth 21 of the waste heat boiler 2 is communicated with the gasification reaction chamber 3 and the semicoke storage chamber 4;
the top of the gasification reaction chamber 3 is provided with a nozzle 31, and the nozzle 31 is respectively communicated with a high-temperature hydrogen gas source 5, an oxygen gas source 6 and a pulverized coal bin 7; the bottom of the semicoke storage chamber 4 is provided with a coke discharging port 41;
the heat exchange medium inlet 22 of the waste heat boiler 2 is communicated with the water supply pipe network 8 of the high-pressure boiler through a pipeline; the heat exchange medium outlet 23 of the waste heat boiler 2 is communicated with the steam pipe network 9 through a pipeline;
the reducing discharger 10 is arranged on the opening of the hearth 21 of the waste heat boiler 2 communicated with the semicoke storage chamber 4, the reducing discharger 10 comprises a feeding funnel 101, a discharging pipe 103 and a U-shaped discharging pipe 102, the opening end of the feeding funnel is communicated with the opening 21 of the hearth of the waste heat boiler 2, the U-shaped discharging pipe 102 effectively reduces the resistance of conveying semicoke by synthesis gas, and smooth conveying of materials is facilitated. One end of a vertically arranged blanking pipe 103 is communicated with the necking end of the feeding funnel 101, and the other end of the blanking pipe 103 is provided with a blocking plate 104; two U-shaped discharging pipes 102 are uniformly distributed on the pipe wall of the discharging pipe 103 along the circumference, and the uniform distribution of the U-shaped discharging pipes 102 ensures that the distribution of the synthesis gas is more uniform, thereby improving the efficiency of semi-coke conveying. One end of each U-shaped discharge pipe 102 is communicated with a discharge pipe 103, and the other end of each U-shaped discharge pipe 102 is a discharge hole of the upward-arranged reducing discharger 10.
A gas-solid separation device 11 is arranged at the discharge port of the reducing discharger 10, and the discharge port of the reducing discharger 10 is communicated with a separation bin feed port 113 of the gas-solid separation device 11 through a feeding reducing pipe 12; the open end of the feeding reducer pipe 12 is communicated with the discharge hole of the reducing discharger 10, and the reduced end of the feeding reducer pipe 12 is communicated with the feed inlet 113 of the separation bin. By arranging the feeding reducer 12, the speed of the synthesis gas pushing the semicoke to enter the gas-solid separation device 11 can be increased, and the gas-solid separation effect can be further improved.
The gas-solid separation device 11 comprises a gas-solid separation bin 111 and a synthetic gas pipe 112; the bottom of the gas-solid separation bin 111 is provided with a separation bin feed inlet 113 and a separation bin discharge outlet 114, the separation bin discharge outlet 114 is provided with a vertically arranged discharge reducer 13, the discharge reducer 13 is full of semicoke and then moves downwards after receiving semicoke, so that the blanking pipe 14 is full of semicoke and can play a role in sealing materials, synthetic gas is prevented from entering the semicoke storage chamber 4, the open end of the discharge reducer 13 is communicated with the separation bin discharge outlet 114, the blanking pipe 14 is vertically arranged at the reducing end of the discharge reducer 13, the bottom end pipe orifice of the blanking pipe 14 and the other end pipe orifice of the blanking pipe 103 are on the same horizontal line, and the blanking pipe 14 can meet the requirement of sealing materials and cannot extend into a semicoke layer due to the fact that the blanking pipe 14 is too long to affect coke discharge.
A synthetic gas pipe 112 horizontally penetrates through the side wall of the gas-solid separation bin 111 between the separation bin feed port 113 and the separation bin discharge port 114, gas inlets 115 are uniformly formed in the pipe wall of the synthetic gas pipe 112 in the gas-solid separation bin 111, and the gas inlets 115 are strip holes formed in the axial direction of the synthetic gas pipe 112; the two ends of the synthesis gas pipe 112 penetrate through the outer wall of the closed furnace body 1 and are arranged outside the closed furnace body 1. An arc-shaped guide plate 116 with a downward opening is arranged in the inner cavity of the gas-solid separation bin 111 above the synthetic gas pipe 112; the arc guide plate 116 is disposed in parallel with the axis of the syngas pipe 112. Through setting up arc deflector 116, adopt the mode of lower part feeding and lower part ejection of compact simultaneously for the material gets into gas-solid separation storehouse 111 and forms half circular arc's rotation in gas-solid separation storehouse 111 along the tangent plane of gas-solid separation device 11, under the effect of centrifugal force, solid semicoke is discharged by separation storehouse discharge gate 114 along the inner wall motion of gas-solid separation device 11, and synthetic gas then gets into synthetic gas pipe 112 discharge gasification furnace by rectangular hole, has realized the purpose of gas-solid separation.
The working description is as follows:
high-temperature hydrogen, oxygen and coal powder enter a reaction chamber of the gasification furnace through a nozzle 31 and react at 700-1000 ℃ and 5-10MPa to generate high-temperature synthesis gas and high-temperature semicoke; because the gasification reaction chamber 3 is arranged at the top of the gasification furnace, high-temperature gas and semicoke generated by reaction form a gas-solid mixture, which is beneficial to forming a self-flowing system of materials, under the promotion of high-temperature synthesis gas, the high-temperature synthesis gas and the high-temperature semicoke smoothly enter the waste heat boiler 2 from the gasification furnace reaction chamber to exchange heat with high-pressure boiler feed water, so that the temperature of the synthesis gas and the semicoke is reduced to 320 ℃, high-temperature steam obtained after the high-pressure boiler feed water is heated by the high-temperature synthesis gas and the high-temperature semicoke is sent to a steam pipe network 9 of a plant area, and the heat of the high-temperature synthesis gas and the high-temperature semicoke of gasification reaction products is recycled. The high-temperature synthesis gas and the high-temperature semicoke generated by the gasification reaction chamber 3 directly enter the waste heat boiler 2 for heat exchange and cooling, so that the recycling of heat energy carried by the high-temperature synthesis gas and the high-temperature semicoke is realized, the introduction of impurity gas is avoided in the cooling process, and the workload of a subsequent synthesis gas purifying device is reduced.
After heat exchange between the high-temperature synthesis gas and the high-temperature semicoke is completed in the waste heat boiler 2, the high-temperature synthesis gas is discharged through the reducing discharger 10 at the bottom of the waste heat boiler 2 and enters the gas-solid separation bin 111 from the section of the gas-solid separation device 11, under the action of centrifugal force, the semicoke moves along the arc-shaped guide plate 116 in the gas-solid separation bin 111, is discharged from the discharge hole 114 of the separation bin of the gas-solid separation device 11, and finally falls into the semicoke storage bin. The synthesis gas enters the synthesis gas pipe 112 from the gas inlet 115 of the synthesis gas pipe 112 and is discharged, so that the effect of gas-solid separation is achieved.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A novel pulverized coal hydrogenation gasification furnace is characterized by comprising a closed furnace body, wherein a waste heat boiler is arranged in the middle of the inner cavity of the closed furnace body; the inner cavity of the closed furnace body above the waste heat boiler is a gasification reaction chamber, and the inner cavity of the closed furnace body below the waste heat boiler is a semicoke storage chamber; the hearth of the waste heat boiler is communicated with the gasification reaction chamber and the semicoke storage chamber;
the top of the gasification reaction chamber is provided with a nozzle which is respectively communicated with a high-temperature hydrogen gas source, an oxygen gas source and a pulverized coal bin; the bottom of the semicoke storage chamber is provided with a coke discharging port;
the heat exchange medium inlet of the waste heat boiler is communicated with a water supply pipe network of the high-pressure boiler through a pipeline; the heat exchange medium outlet of the waste heat boiler is communicated with the steam pipe network through a pipeline;
a reducing discharger is arranged on a hearth opening of the waste heat boiler communicated with the semicoke storage chamber; the discharge hole of the reducing discharger is arranged upwards; a gas-solid separation device is arranged at a discharge port of the reducing discharger, and the discharge port of the reducing discharger is communicated with a separation bin feed inlet of the gas-solid separation device;
the gas-solid separation device comprises a gas-solid separation bin and a synthetic gas pipe;
the bottom of the gas-solid separation bin is provided with a separation bin feed inlet and a separation bin discharge outlet, and the synthesis gas pipe horizontally penetrates through the side wall of the gas-solid separation bin between the separation bin feed inlet and the separation bin discharge outlet;
the wall of the synthetic gas pipe in the gas-solid separation bin is uniformly provided with gas inlets; and two ends of the synthesis gas pipe penetrate through the outer wall of the closed furnace body and are arranged on the outer side of the closed furnace body.
2. The novel pulverized coal hydrogenation gasification furnace as claimed in claim 1, wherein the reducing discharger comprises a feeding funnel and a U-shaped discharge pipe, the open end of the feeding funnel is communicated with the hearth opening of the waste heat boiler, one end of the U-shaped discharge pipe is communicated with the reduced end of the feeding funnel, and the other end of the U-shaped discharge pipe is a discharge hole of the reducing discharger, which is arranged upwards.
3. The novel pulverized coal hydrogenation gasification furnace as claimed in claim 1, wherein the variable diameter discharger comprises a feeding funnel, a discharging pipe and a U-shaped discharging pipe, the open end of which is communicated with the hearth opening of the waste heat boiler; one end of the vertically arranged blanking pipe is communicated with the necking end of the feeding hopper, and the other end of the blanking pipe is provided with a blocking plate; more than two U-shaped discharge pipes are uniformly distributed on the pipe wall of the discharge pipe along the circumference; one end of each U-shaped discharge pipe is communicated with the discharge pipe, and the other end of each U-shaped discharge pipe is a discharge hole of the variable-diameter discharger which is arranged upwards.
4. The novel pulverized coal hydrogenation gasification furnace as claimed in any one of claims 1 to 3, wherein the discharge outlet of the reducing discharger is communicated with the feed inlet of the separation bin through a feed reducing pipe; the open end of the feeding reducing pipe is communicated with the discharge hole of the reducing discharger, and the reducing end of the feeding reducing pipe is communicated with the feed inlet of the separation bin.
5. A novel pulverized coal hydrogenation gasification furnace as claimed in any one of claims 1 to 3, wherein a vertically arranged discharge reducer is provided at the discharge outlet of the separation bin, the open end of the discharge reducer is communicated with the discharge outlet of the separation bin, and a blanking pipe is vertically provided at the throat end of the discharge reducer.
6. The novel pulverized coal hydrogenation gasification furnace as claimed in claim 4, wherein a discharge reducer pipe is vertically arranged at the discharge port of the separation bin, the open end of the discharge reducer pipe is communicated with the discharge port of the separation bin, a blanking pipe is vertically arranged at the reduced end of the discharge reducer pipe, and the bottom end pipe orifice of the blanking pipe and the other end pipe orifice of the blanking pipe are in the same horizontal line.
7. The novel pulverized coal hydrogenation gasification furnace according to any one of claims 1, 2, 3 and 6, wherein an arc-shaped guide plate with a downward opening is arranged in the inner cavity of the gas-solid separation bin above the synthesis gas pipe; the axial direction of the arc-shaped guide plate is parallel to the axial direction of the synthesis gas pipe.
8. The novel pulverized coal hydrogenation gasification furnace as claimed in claim 4, wherein an arc-shaped guide plate with a downward opening is arranged in the inner cavity of the gas-solid separation bin above the synthesis gas pipe; the axial direction of the arc-shaped guide plate is parallel to the axial direction of the synthesis gas pipe.
9. The novel pulverized coal hydrogenation gasification furnace as claimed in claim 5, wherein an arc-shaped guide plate with a downward opening is arranged in the inner cavity of the gas-solid separation bin above the synthesis gas pipe; the axial direction of the arc-shaped guide plate is parallel to the axial direction of the synthesis gas pipe.
10. The novel pulverized coal hydrogenation gasification furnace as claimed in claim 1, wherein the gas inlet is a long hole opened along the axial direction of the synthesis gas pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222426887.3U CN218146508U (en) | 2022-09-13 | 2022-09-13 | Novel fine coal hydrogenation gasification furnace |
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