CN209816032U - Alkane gas preparation, desulfurization and tar removal device - Google Patents
Alkane gas preparation, desulfurization and tar removal device Download PDFInfo
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- CN209816032U CN209816032U CN201920531286.4U CN201920531286U CN209816032U CN 209816032 U CN209816032 U CN 209816032U CN 201920531286 U CN201920531286 U CN 201920531286U CN 209816032 U CN209816032 U CN 209816032U
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Abstract
The utility model relates to a device for preparing alkane gas, desulfurizing and removing tar, which comprises an alkane gas generating furnace, a water ring vacuum pump and an alkaline water pool; the alkane gas generating furnace is provided with a first-stage furnace body and a second-stage furnace body, and the second-stage furnace body is internally provided with a drying section and a dry distillation section; the second section of furnace body is arranged in the first section of furnace body and positioned at the upper part of the first section of furnace body, the lower part of the first section of furnace body is provided with a tower-shaped grate, one side of the top of the first section of furnace body is provided with an alkane gas outlet, the bottom of the first section of furnace body is provided with an ash discharge port, and the lower part of the first section of furnace body is provided with; the residual gas inlet is connected with the exhaust port of the water-ring vacuum pump, and the air suction port of the water-ring vacuum pump is connected with the coal smoke outlet at the top of the second-stage furnace body; the water inlet and the water outlet of the water ring vacuum pump are respectively connected with an alkaline water pool. The utility model discloses can be when generating pure alkane gas, effectively get rid of sulfur dioxide, dust, atmospheric pollutants such as coal tar that contain in the soot that the reaction sequence produced, avoid follow-up pipeline to block up to can prevent environmental pollution.
Description
Technical Field
The utility model relates to a coal gas preparation technical field especially relates to a gaseous preparation of alkane, desulfurization tar removing device.
Background
With the continuous aggravation of energy shortage and environmental pollution, in order to respond to the national call for clean and efficient utilization of coal, the development of coal gasification technology is an effective method for effectively realizing clean and efficient utilization of coal.
In the existing gas preparation device, sulfur dioxide, tar and other atmospheric pollutants are not completely treated and contain a large amount of dust in the gas preparation process, so that the gas often blocks a pipeline in the conveying process, and the gas is directly discharged into the atmosphere after being combusted, thereby causing serious environmental pollution.
Disclosure of Invention
The utility model provides a gaseous preparation of alkane, desulfurization tar removing device can effectively get rid of sulfur dioxide, dust, atmospheric pollutants such as coal tar that contain in the soot that the reaction sequence produced when generating pure alkane gas, avoids follow-up pipeline to block up to can prevent environmental pollution.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a device for preparing alkane gas, desulfurizing and removing tar comprises an alkane gas generating furnace, a water ring vacuum pump and an alkaline water pool; the alkane gas generating furnace is provided with a first-stage furnace body and a second-stage furnace body, and the second-stage furnace body is internally provided with a drying section and a dry distillation section; the second-section furnace body is arranged in the first-section furnace body and is positioned at the upper part of the first-section furnace body, the top of the second-section furnace body is provided with a feed inlet, and the bottom of the second-section furnace body is communicated with the first-section furnace body; the lower part of the first furnace body is provided with a tower-shaped grate which can horizontally rotate; one side of the top of the first furnace body is provided with an alkane gas outlet, the bottom of the first furnace body is provided with an ash discharge port, and the lower part of the first furnace body is provided with a high-temperature mixed gas inlet and a residual gas inlet; the high-temperature mixed gas inlet is connected with a high-temperature oxygen and water vapor conveying pipeline; the residual gas inlet is connected with the exhaust port of the water-ring vacuum pump, and the air suction port of the water-ring vacuum pump is connected with the coal smoke outlet at the top of the second-stage furnace body; the water inlet and the water outlet of the water ring vacuum pump are respectively connected with an alkaline water pool.
The one-stage feeding bin and the second-stage feeding bin are arranged above the feeding port of the second-stage furnace body, the discharging port at the bottom of the one-stage feeding bin is connected with the feeding port at the top of the second-stage feeding bin in a nested manner, and the discharging port at the bottom of the second-stage feeding bin is connected with the feeding port of the second-stage furnace body in a nested manner.
And a spherical valve is respectively arranged at the discharge port at the bottom of the first-stage feeding bin and the discharge port at the bottom of the second-stage feeding bin, and is driven by a hydraulic cylinder through a link mechanism.
The ash outlet at the bottom of the first furnace body is connected with an ash outlet bin through a star-shaped ash discharge valve, the ash inlet and the ash outlet of the ash outlet bin are respectively provided with a spherical valve, and the spherical valves are driven by a hydraulic cylinder through a link mechanism.
The outer wall of the first-stage furnace body and the second-stage furnace body are both made of steel pipes with the wall thickness of 8-15 mm, and the inner wall of the first-stage furnace body is built by refractory bricks.
The feed inlet at the top of the first-stage feeding bin is connected with a material conveying device, and the material conveying device is a bucket elevator.
The slag breaking device is characterized in that a slag breaking disc is further arranged in the furnace body at one section, the slag breaking disc is arranged on the periphery of the tower-shaped furnace operator along the annular direction, and the slag breaking disc is fixedly connected with the inner side wall of the furnace body at one section.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the water-ring vacuum pump is used as a flue gas circulating and purifying device, a sealing water ring in the water-ring vacuum pump adopts alkaline water, most harmful substances such as soot, sulfur dioxide and tar generated during the drying and dry distillation reaction of coal in the second-stage furnace body are purified by the alkaline water, the residual gas returns to the first-stage furnace body, a series of chemical reactions are generated with oxygen after the high-temperature heating of a combustion layer and a reduction layer, the residual harmful substances are converted into sulfur trioxide and carbon monoxide, and the residual harmful substances are easily cleaned under the action of a subsequent purifying device, so that pure alkane gas is produced;
2) introducing the mixed gas of the high-temperature water vapor and the combustion-supporting gas (oxygen) which are fully mixed into a first-stage furnace body, adding physical heat into the furnace, and reducing the consumption of chemical reaction heat; meanwhile, the high-temperature mixed gas can generate more alkane gas mixed with hydrogen and carbon monoxide when undergoing a series of chemical reactions with the high-temperature coal blocks of the combustion layer and the reduction layer;
3) a water ring vacuum pump is adopted as a purification device of the soot, so that sulfur elements and coal tar in the soot can be fully contacted and reacted with alkaline water, the aim of desulfurization and tar removal is achieved, and the residual small amount of tar can be completely consumed when the residual small amount of tar is returned to the furnace for secondary combustion;
4) the method reduces the mixing of sulfur element and tar in alkane gas, effectively removes doped dust, reduces the possibility of blocking pipelines by dust, and achieves the aim of protecting the environment.
Drawings
FIG. 1 is a schematic structural diagram of an alkane gas preparation, desulfurization and tar removal device of the present invention.
FIG. 2 is a process flow diagram of an alkane gas preparation, desulfurization and tar removal device of the present invention.
In the figure: 1. an ash outlet bin 2, a star-shaped ash discharge valve 3, a bucket elevator 4, a tower-shaped grate 5, an upper hopper 6, a first-stage feeding bin 7, a second-stage feeding bin 8, a second-stage furnace body 9, a first-stage furnace body 10, a grate driving motor 11, a water ring vacuum pump 12, an alkali water tank 13, a spherical valve 14, a coal smoke gas outlet 15, an alkane gas outlet 16, a high-temperature mixed gas inlet 17 and a residual gas inlet
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1, the device for preparing alkane gas, desulfurizing and removing tar of the present invention comprises an alkane gas generating furnace, a water ring vacuum pump 11 and a caustic soda pool 12; the alkane gas generating furnace is provided with a first-stage furnace body 9 and a second-stage furnace body 8, and the second-stage furnace body 8 is internally provided with a drying section and a dry distillation section; the second-stage furnace body 8 is arranged in the first-stage furnace body 9 and is positioned at the upper part of the first-stage furnace body 9, a feed inlet is formed in the top of the second-stage furnace body 8, and the bottom of the second-stage furnace body is communicated with the first-stage furnace body 9; the lower part of the first section of the furnace body 9 is provided with a tower-shaped grate 4, and the tower-shaped grate 4 can horizontally rotate; one side of the top of the first furnace body 9 is provided with an alkane gas outlet 15, the bottom is provided with an ash discharge port, and the lower part is provided with a high-temperature mixed gas inlet 16 and a residual gas inlet 17; the high-temperature mixed gas inlet 16 is connected with a high-temperature oxygen and water vapor conveying pipeline; the residual gas inlet 17 is connected with the exhaust port of the water-ring vacuum pump 11, and the air suction port of the water-ring vacuum pump 11 is connected with the coal smoke outlet 14 at the top of the second-stage furnace body 8; the water inlet and the water outlet of the water ring vacuum pump 11 are respectively connected with the alkaline water pool 12.
One-level feeding bin 6 and second grade feeding bin 7 are established to the feed inlet top of two-stage furnace body 8, and the discharge gate of 6 bottoms in one-level feeding bin is connected with the nested formula of the pan feeding mouth at 7 tops in second grade feeding bin, and the discharge gate of 7 bottoms in second grade feeding bin is connected with the nested formula of the feed inlet of two-stage furnace body 8.
And a spherical valve 13 is respectively arranged at a discharge port at the bottom of the first-stage feeding bin 6 and a discharge port at the bottom of the second-stage feeding bin 7, and the spherical valve 13 is driven by a hydraulic cylinder through a link mechanism.
The ash outlet at the bottom of the first furnace body 9 is connected with an ash outlet bin 1 through a star-shaped ash discharge valve 2, the ash inlet and the ash outlet of the ash outlet bin 1 are respectively provided with a spherical valve 13, and the spherical valves 13 are driven by a hydraulic cylinder through a link mechanism.
The outer wall of the first-stage furnace body 9 and the second-stage furnace body 8 are both made of steel pipes with the wall thickness of 8-15 mm, and the inner wall of the first-stage furnace body 9 is built by refractory bricks.
The feed inlet at the top of the first-stage feeding bin 6 is connected with a material conveying device, and the material conveying device is a bucket elevator 3.
Still be equipped with broken slag disk in one section furnace body 9, broken slag disk sets up in the periphery of tower form furnace operator 4 along the hoop, broken slag disk and the inside wall fixed connection of one section furnace body 9.
The alkane gas preparation, desulfurization and tar removal method based on the device comprises the following steps:
1) the coal is conveyed into a primary feeding bin 6 through a bucket elevator 3, a spherical valve 13 at a discharge port at the bottom of the primary feeding bin 6 is opened, the coal enters a secondary feeding bin 7, and then the spherical valve 13 at the discharge port at the bottom of the primary feeding bin 6 is closed; a spherical valve 13 at a discharge port at the bottom of the secondary feeding bin 7 is opened, and the coal blocks enter a second-stage furnace body 8 of the alkane gas generating furnace; firstly, the burning coal blocks are put into the alkane gas generating furnace, and the subsequently put coal blocks are continuously burnt in the alkane gas generating furnace;
2) the coal blocks enter the alkane gas generating furnace and are stacked on the tower-shaped grate 4, and the coal blocks which enter the tower-shaped grate are stacked layer by layer and slowly descend; the coal blocks firstly undergo two processes of drying and dry distillation in the second-stage furnace body 8, and slowly descend into the first-stage furnace body 9 when being burnt to a semicoke state; in a first furnace body 9, coal blocks firstly enter a reduction layer in a high-temperature anoxic state, coal in a semicoke state starts to generate carbon monoxide at the reduction layer, high-temperature water vapor is deoxidized to form hydrogen, and alkane gas is generated; the coal blocks are continuously combusted and descend to a high-temperature combustion layer in a lean oxygen state, water vapor is decomposed to generate hydrogen, coal is incompletely combusted to generate carbon monoxide, and a small part of coal is completely combusted to generate carbon dioxide; the coal blocks are continuously combusted and descend into the ash layer in a high-temperature oxygen-enriched state, and the coal blocks are completely combusted at the ash layer to become coal ash; under the rotation and stirring of the tower-shaped grate 4, coal ash and slag contact with the slag breaking disc and are crushed into fine granular ash and slag fall to the bottom of the alkane gas generating furnace; the spherical valve 13 at the top of the ash discharging bin 1 is opened, ash is discharged into the ash discharging bin 1 through the star-shaped ash discharging valve 2, when the ash in the ash discharging bin 1 is full, the star-shaped ash discharging valve 2 stops rotating, the spherical valve 13 at the top of the ash discharging bin 1 is closed, and the spherical valve 13 at the bottom is opened to discharge the ash;
3) in the second-stage furnace body 8, a large amount of soot generated during drying and dry distillation of the coal is pumped out by the water ring vacuum pump 11, the water ring vacuum pump 11 simultaneously pumps alkaline water in the alkaline water tank 12, the soot pumped out from the second-stage furnace body 8 is fully contacted with the alkaline water 12 in the water ring vacuum pump 11 under the action of centrifugal force of high-speed rotation of the water ring vacuum pump 11, sulfur dioxide, tar, dust and other impurities in the soot are cleaned, the cleaned sewage is discharged into the alkaline water tank 12 and is recycled after precipitation, and the cleaned residual flue gas is sent to the bottom of the first-stage furnace body 9 for secondary combustion to remove the residual impurities;
4) introducing mixed gas of high-temperature oxygen and water vapor into the bottom of the first-stage furnace body 9 from a high-temperature mixed gas inlet 16; the high-temperature mixed gas is firstly contacted with an ash layer, and oxygen in the high-temperature mixed gas is used as combustion-supporting gas to enable a small amount of residual coal in the ash layer to be fully combusted and provide heat; then the high-temperature mixed gas enters a combustion layer, wherein the water vapor and the coal react to generate hydrogen and carbon monoxide, the oxygen and the coal react to generate carbon monoxide and carbon dioxide, and a new mixed gas containing the hydrogen, the carbon monoxide, the carbon dioxide, the water vapor and the oxygen is formed in the combustion layer; after the new mixed gas enters the reduction layer, under a high-temperature state, water vapor and oxygen in the mixed gas are completely consumed and generate a large amount of hydrogen and carbon monoxide, carbon dioxide in the mixed gas reacts with coal to generate carbon monoxide, finally alkane gas containing a large amount of hydrogen, carbon monoxide, a small amount of carbon dioxide, a small amount of sulfur dioxide and dust is formed in the reduction layer, wherein the small amount of sulfur dioxide is easily purified through a subsequent purifying device, most of the alkane gas enters the alkane gas conveying pipeline through the alkane gas outlet 15 at the top of the first-stage furnace body 9, and a small amount of the alkane gas enters the second-stage furnace body 8 and then is mixed into soot and enters the next circulation process.
The water ring vacuum pump 11 is respectively connected with the alkaline water tank 12, the upper part of the second furnace body 8 and the lower part of the first furnace body 9 of the alkane gas generating furnace, and is used for pumping soot generated in the drying section and the dry distillation section of the second furnace body 8 into the water ring vacuum pump 11, enabling the soot and alkaline water to be fully mixed and contacted to remove sulfur dioxide, tar and other harmful substances in the soot, introducing the purified residual mixed gas into the first furnace body 9 of the alkane gas generating furnace to participate in combustion again, and enabling water vapor in the residual mixed gas and high-temperature coal to generate a series of chemical reactions to generate carbon monoxide and hydrogen. The top of the first-stage furnace body 9 of the alkane gas generating furnace is provided with an alkane gas outlet 15, and the alkane gas after desulfurization and tar removal is conveyed to a subsequent purification device through the alkane gas outlet to further remove a small amount of dust in the alkane gas.
The lower part of the first furnace body 9 is filled with the mixed gas of high-temperature oxygen and water vapor, so that the temperature in the first furnace body 9 is always in a high-temperature state, and the use amount of coal combustion heat is saved. The high-temperature mixed gas firstly contacts the ash layer of coal to promote the coal in the ash layer to be completely combusted, and a small amount of heat is generated; and then the high-temperature mixed gas continuously rises to the combustion layer, and a large amount of heat generated by the combustion of the coal in the combustion layer is used for providing heat for the reduction reaction of the high-temperature mixed gas and the reduction layer. In the reduction layer, high-temperature water vapor generates carbon monoxide and hydrogen under the reduction action of coal, the coal reacts with oxygen and carbon dioxide in the mixed gas under the anoxic state to generate carbon monoxide gas, and finally alkane gas mixed with the carbon monoxide and the hydrogen is formed.
The drying and dry distillation of coal are both generated in a second-stage furnace body 8 of the alkane gas generating furnace, the coal generates a large amount of soot in the drying section and the dry distillation section, the soot contains sulfur dioxide, dust, coal tar and other atmospheric pollutants, the soot is pumped into a water ring vacuum pump 11 through a soot gas outlet 14 at the top of the second-stage furnace body 8 and is fully contacted and mixed with alkaline water pumped from an alkaline water tank 12, the sulfur dioxide, the dust and the coal tar in the soot are cleaned, the purified residual gas returns to a first-stage furnace body 9 and is mixed with high-temperature mixed gas for secondary combustion, and the residual small amount of coal tar is removed.
The inner wall of the first section of the furnace body 9 of the alkane gas generating furnace is built by refractory bricks, and the outer wall is made of steel pipes, so that the requirements of temperature and pressure in the furnace can be met, and the service life of equipment can be prolonged.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. A device for preparing alkane gas, desulfurizing and removing tar is characterized by comprising an alkane gas generating furnace, a water ring vacuum pump and an alkaline water pool; the alkane gas generating furnace is provided with a first-stage furnace body and a second-stage furnace body, and the second-stage furnace body is internally provided with a drying section and a dry distillation section; the second-section furnace body is arranged in the first-section furnace body and is positioned at the upper part of the first-section furnace body, the top of the second-section furnace body is provided with a feed inlet, and the bottom of the second-section furnace body is communicated with the first-section furnace body; the lower part of the first furnace body is provided with a tower-shaped grate which can horizontally rotate; one side of the top of the first furnace body is provided with an alkane gas outlet, the bottom of the first furnace body is provided with an ash discharge port, and the lower part of the first furnace body is provided with a high-temperature mixed gas inlet and a residual gas inlet; the high-temperature mixed gas inlet is connected with a high-temperature oxygen and water vapor conveying pipeline; the residual gas inlet is connected with the exhaust port of the water-ring vacuum pump, and the air suction port of the water-ring vacuum pump is connected with the coal smoke outlet at the top of the second-stage furnace body; the water inlet and the water outlet of the water ring vacuum pump are respectively connected with an alkaline water pool.
2. The alkane gas preparation, desulfurization and tar removal device according to claim 1, wherein a first feeding bin and a second feeding bin are arranged above the feeding port of the second-stage furnace body, the discharging port at the bottom of the first feeding bin is connected with the feeding port at the top of the second feeding bin in a nested manner, and the discharging port at the bottom of the second feeding bin is connected with the feeding port of the second-stage furnace body in a nested manner.
3. The device for preparing, desulfurizing and removing tar of alkane gas according to claim 2, wherein a discharge port at the bottom of the primary feeding bin and a discharge port at the bottom of the secondary feeding bin are respectively provided with a spherical valve, and the spherical valves are driven by a hydraulic cylinder through a link mechanism.
4. The alkane gas preparation, desulfurization and tar removal device according to claim 1, wherein the ash outlet at the bottom of the first furnace body is connected with the ash outlet bin through a star-shaped ash discharge valve, the ash inlet and the ash outlet of the ash outlet bin are respectively provided with a spherical valve, and the spherical valves are driven by a hydraulic cylinder through a link mechanism.
5. The alkane gas preparation, desulfurization and tar removal device according to claim 1, wherein the outer wall of the first furnace body and the second furnace body are both made of steel pipes with a wall thickness of 8-15 mm, and the inner wall of the first furnace body is built by refractory bricks.
6. The alkane gas preparation, desulfurization and detarring device according to claim 2, wherein the feed inlet at the top of the primary feed bin is connected with a material conveying device, and the material conveying device is a bucket elevator.
7. The alkane gas preparation, desulfurization and tar removal device according to claim 1, wherein a slag breaking disc is further arranged in the first section of furnace body, the slag breaking disc is circumferentially arranged at the periphery of the tower-shaped furnace operator, and the slag breaking disc is fixedly connected with the inner side wall of the first section of furnace body.
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| CN201920531286.4U CN209816032U (en) | 2019-04-18 | 2019-04-18 | Alkane gas preparation, desulfurization and tar removal device |
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| CN201920531286.4U CN209816032U (en) | 2019-04-18 | 2019-04-18 | Alkane gas preparation, desulfurization and tar removal device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109988591A (en) * | 2019-04-18 | 2019-07-09 | 辽宁科技大学 | A kind of preparation of paraffin gas, desulfurization detar device and method |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109988591A (en) * | 2019-04-18 | 2019-07-09 | 辽宁科技大学 | A kind of preparation of paraffin gas, desulfurization detar device and method |
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