CN112029542B - Hydro-gasification system and method - Google Patents
Hydro-gasification system and method Download PDFInfo
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- CN112029542B CN112029542B CN202010826947.3A CN202010826947A CN112029542B CN 112029542 B CN112029542 B CN 112029542B CN 202010826947 A CN202010826947 A CN 202010826947A CN 112029542 B CN112029542 B CN 112029542B
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- 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
- C10J3/48—Apparatus; Plants
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- 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
- C10J2300/0966—Hydrogen
Abstract
The disclosure relates to the technical field of coal hydro-gasification, in particular to a hydro-gasification system and a method, wherein the hydro-gasification system comprises a gasification furnace, a first conveying pipeline, a second conveying pipeline and a third conveying pipeline, wherein a first control component is arranged between the first conveying pipeline and the third conveying pipeline and used for controlling the mass ratio of hydrogen and coal powder conveyed into the gasification furnace; and a second control component is arranged between the first conveying pipeline and the second conveying pipeline and used for controlling the mass ratio of the hydrogen and the oxygen conveyed into the gasification furnace. In the hydro-gasification system provided by the application, through setting up first control unit and second control unit, realized the quality according to the quality control oxygen of hydrogen, avoided the influence of the back flow that the head-on collision produced to oxygen admission volume to realized the accurate control to the hydrogen temperature in the gasifier, guaranteed the rate of rise of temperature of buggy, thereby improved the output of hydrogen and buggy reaction time, improved gasification system's oil yield.
Description
Technical Field
The disclosure relates to the technical field of coal hydro-gasification, in particular to a hydro-gasification system and a hydro-gasification method.
Background
The hydrogenation gasification furnace is respectively filled with high-temperature hydrogen, oxygen and coal powder through a nozzle, the oxygen and the hydrogen generate combustion reaction, and the temperature of the high-temperature hydrogen is further increased by heat generated by combustion. The coal powder is from a high-pressure material sending tank, the high-pressure material sending tank and the gasification furnace keep a certain pressure difference, the coal powder is conveyed into the gasification furnace, and then the coal powder and high-temperature hydrogen gas are subjected to exothermic reactions such as hydro-gasification and the like.
When the coal powder enters the furnace body through the nozzle, hydrogen and the coal powder collide at the outlet of the nozzle to generate a first reaction to generate coal tar, and then the coal tar is further reacted to release heat along with the full mixing of the coal powder and the high-temperature hydrogen to generate the light coal tar. The temperature of the reaction zone is gradually increased from top to bottom, but certain backflow exists in the collision, high-temperature gas flows back to the upper section of the reaction zone from the lower section of the reaction zone, the temperature of the upper section of the reaction zone is increased, the temperature fed back by temperature monitoring equipment at the upper section of the reaction zone is higher, the system reduces the introduction amount of oxygen, the temperature of hydrogen in contact with pulverized coal is lower, the heating rate of the pulverized coal at a nozzle opening is reduced, the amount of coal tar generated in the first reaction is less, and the overall oil yield is lower.
Therefore, in the prior art, the introduction amount of oxygen is controlled by monitoring the temperature of the upper section of the reaction zone, so that the temperature of hydrogen in contact with pulverized coal cannot be guaranteed to reach the preset temperature, and the overall oil yield of the gasification system is low.
Disclosure of Invention
To address the above technical problems, or at least partially to address the above technical problems, the present disclosure provides a hydro-gasification system and method.
The present disclosure provides a hydro-gasification system comprising: the system comprises a gasification furnace, a first conveying pipeline for conveying hydrogen into the gasification furnace, a second conveying pipeline for conveying oxygen into the gasification furnace and a third conveying pipeline for conveying coal powder into the gasification furnace; wherein the content of the first and second substances,
a first control component is arranged between the first conveying pipeline and the third conveying pipeline and used for controlling the mass ratio of the hydrogen and the coal powder conveyed into the gasification furnace;
and a second control component is arranged between the first conveying pipeline and the second conveying pipeline and used for controlling the mass ratio of the hydrogen and the oxygen conveyed into the gasification furnace.
In the hydrogasification system that this disclosure provided, hydrogen is carried to the gasifier through first pipeline, and oxygen is carried to the gasifier through second pipeline, and oxygen and partial hydrogen take place combustion reaction in the gasifier, release a large amount of heats, heats the hydrogen that does not take place combustion reaction, and the buggy is carried to the gasifier through third pipeline in, reacts with high temperature hydrogen emergence, generates the coal tar. In order to ensure that sufficient hydrogen reacts with the pulverized coal in the gasification furnace, the ventilation quantity of the first conveying pipeline is changed by adjusting the first control part according to the quality of the pulverized coal introduced into the gasification furnace, so that the quality of the hydrogen introduced into the gasification furnace is adjusted; in order to heat the temperature of the hydrogen in the gasification furnace to a preset temperature, according to the quality of the introduced hydrogen, the ventilation quantity of the second conveying pipeline is changed by adjusting the second control component, so that the quality of the introduced oxygen in the gasification furnace is adjusted, namely, the introduction quantity of the oxygen in the gasification furnace is determined by the introduction quantity of the hydrogen, the influence of the temperature change in the gasification furnace on the introduction quantity of the oxygen is avoided, namely, the influence of the backflow generated by collision on the introduction quantity of the oxygen is avoided, the accurate control on the temperature of the hydrogen in the gasification furnace is realized, the temperature rise rate of the pulverized coal is ensured, the yield of coal tar in the reaction of the hydrogen and the pulverized coal is improved, and the oil yield of a gasification system is improved.
Optionally, the gasification furnace is provided with a plurality of nozzles, each nozzle comprises a first air inlet channel, a second air inlet channel and a feeding channel, the first air inlet channel is communicated with the first conveying pipeline, the second air inlet channel is communicated with the second conveying pipeline, and the feeding channel is communicated with the third conveying pipeline.
Optionally, the first intake passage, the second intake passage and the feed passage do not communicate with each other.
Optionally, the first air intake passage is surrounded outside the second air intake passage.
Optionally, the axis of each nozzle is arranged to point to the axis of the gasification furnace to form a material collision zone below the nozzle.
Optionally, an air inlet is arranged on the side wall of the gasification furnace, and the air inlet is located below the material collision area.
Optionally, the system further comprises a heating device, wherein the heating device is communicated with the first conveying pipeline.
The present disclosure also provides a hydro-gasification process,
introducing hydrogen with first mass and oxygen with second mass into the gasification furnace;
introducing coal powder into the gasification furnace;
introducing hydrogen with a third mass into the gasification furnace so that the ratio of the mass of the hydrogen in the gasification furnace to the mass of the pulverized coal is within a first preset range, wherein the mass of the hydrogen is the sum of the first mass and the third mass;
and introducing fourth mass of oxygen into the gasification furnace, so that the ratio of the mass of the hydrogen to the mass of the oxygen in the gasification furnace is in a second preset range, wherein the mass of the oxygen is the sum of the second mass and the fourth mass.
Optionally, before the introducing the first mass of hydrogen and the second mass of oxygen into the gasifier, the method further includes:
the hydrogen gas is heated.
Optionally, before the heating the hydrogen gas, the method further comprises:
and determining the mass ratio of the first mass of hydrogen to the second mass of oxygen fed into the gasification furnace.
Optionally, after the introducing oxygen of a fourth mass into the gasification furnace, the method further includes:
and (4) collecting the temperature below the material collision area, and introducing hydrogen when the temperature is higher than a set temperature.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic diagram of a hydro-gasification system according to an embodiment of the disclosure;
FIG. 2 is a schematic diagram of a configuration at a nozzle in a hydro-gasification system according to an embodiment of the disclosure;
FIG. 3 is a schematic structural view of a nozzle according to an embodiment of the present disclosure;
FIG. 4 is a schematic flow diagram of a hydro-gasification process according to an embodiment of the disclosure.
Wherein, 1-a gasification furnace; 2-a first delivery conduit; 3-a second delivery conduit; 4-a third delivery conduit; 5-a first control component; 6-a second control component; 7-a nozzle; 71-a first air intake passage; 72-a second intake passage; 73-a feed channel; 8-an air inlet; 9-a heating device; 10-a water inlet; 11-crude gas outlet.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
In the prior art, the quality of oxygen introduced into the gasification furnace is controlled by monitoring the temperature of the upper reaction zone section in the gasification furnace, and due to the fact that certain backflow exists when hydrogen and coal powder collide with each other, high-temperature gas flows back to the upper reaction zone section from the lower reaction zone section, the temperature of the upper reaction zone section is improved, the temperature fed back by temperature monitoring equipment in the upper reaction zone section is higher, the system is enabled to reduce the introduction amount of oxygen, the temperature of the hydrogen contacted with the coal powder cannot be guaranteed to reach the preset temperature, and the overall oil yield of the gasification system is lower.
FIG. 1 is a schematic diagram of a hydro-gasification system according to an embodiment of the disclosure; FIG. 2 is a schematic diagram of a configuration at a nozzle in a hydro-gasification system according to an embodiment of the disclosure. As shown in fig. 1-2, embodiments of the present disclosure provide a hydro-gasification system, comprising: the system comprises a gasification furnace 1, a first conveying pipeline 2 for conveying hydrogen into the gasification furnace 1, a second conveying pipeline 3 for conveying oxygen into the gasification furnace 1 and a third conveying pipeline 4 for conveying coal powder into the gasification furnace 1; a first control component 5 is arranged between the first conveying pipeline 2 and the third conveying pipeline 4 and is used for controlling the mass ratio of the hydrogen and the pulverized coal conveyed into the gasification furnace 1; a second control component 6 is arranged between the first conveying pipeline 2 and the second conveying pipeline 3 and is used for controlling the mass ratio of the hydrogen and the oxygen conveyed into the gasification furnace 1.
In the hydrogasification system that this disclosure provided, hydrogen carries to gasifier 1 through first pipeline 2 in, and oxygen carries to gasifier 1 through second pipeline 3 in, and oxygen and partial hydrogen take place combustion reaction in gasifier 1, release a large amount of heats, heats the hydrogen that does not take place combustion reaction, and the buggy is carried to gasifier 1 in through third pipeline 4, reacts with high temperature hydrogen emergence, generates the coal tar. In order to ensure that sufficient hydrogen gas reacts with the pulverized coal in the gasification furnace 1, the ventilation quantity of the first conveying pipeline 2 is changed by adjusting the first control component 5 according to the quality of the pulverized coal introduced into the gasification furnace 1, so that the quality of the hydrogen gas introduced into the gasification furnace 1 is adjusted; in order to heat the temperature of the hydrogen in the gasification furnace 1 to a preset temperature, according to the quality of the introduced hydrogen, the ventilation quantity of the second conveying pipeline 3 is changed by adjusting the second control component 6, so that the quality of the oxygen introduced into the gasification furnace 1 is adjusted, namely, the introduction quantity of the oxygen in the gasification furnace 1 is determined by the introduction quantity of the hydrogen, the influence of the temperature change in the gasification furnace 1 on the introduction quantity of the oxygen is avoided, namely, the influence of the backflow generated by collision on the introduction quantity of the oxygen is avoided, the accurate control on the temperature of the hydrogen in the gasification furnace 1 is realized, the temperature rise rate of the pulverized coal is ensured, the yield of coal tar during the reaction of the hydrogen and the pulverized coal is improved, and the oil yield of a gasification system is improved.
The aforesaid temperature that lets in to the hydrogen in the gasifier 1 through first pipeline 2 is not less than the ignition point of hydrogen, makes hydrogen let in to gasifier 1 in with the oxygen when meeting take place the combustion reaction, the release heat plays the effect of heating to the hydrogen that does not take place the combustion reaction to improve the ambient temperature of buggy and hydrogen reaction, improve the efficiency of buggy and hydrogen reaction.
In order to avoid waste of the pulverized coal, firstly, hydrogen and oxygen are introduced into the gasification furnace 1, combustion reaction is carried out on the hydrogen and the oxygen, the temperature in the gasification furnace 1 is increased, and when the temperature in the gasification furnace 1 reaches a preset temperature, the pulverized coal is introduced to enable the pulverized coal to be in contact reaction with the high-temperature hydrogen.
In some embodiments, the gasification furnace 1 is provided with a plurality of nozzles 7, each nozzle 7 includes a first air inlet passage 71, a second air inlet passage 72, and a feed passage 73, the first air inlet passage 71 communicates with the first transfer duct 2, the second air inlet passage 72 communicates with the second transfer duct 3, and the feed passage 73 communicates with the third transfer duct 4.
Be provided with first inlet channel 71, second inlet channel 72 and feedstock channel 73 in the nozzle 7 of above-mentioned gasifier 1, hydrogen is through first inlet channel 71 input, oxygen is through second inlet channel 72 input, at the gas outlet department of first inlet channel 71 and second inlet channel 72, hydrogen meets with oxygen, hydrogen burning release heat, heat the intensification to unburnt hydrogen and the buggy that gets into through feedstock channel 73, make buggy and hydrogen take place to react, generate the coal tar.
Through setting up a plurality of above-mentioned nozzles 7, with hydrogen and buggy dispersion input in gasifier 1, increased the area of contact of hydrogen and buggy, improved the reaction rate of buggy to, effectively avoided the buggy to concentrate the input and cause partial buggy can't contact with hydrogen, the waste of the buggy that leads to, thereby improved the gasification efficiency of buggy, and reduced the carbon content in the cinder that forms.
In some embodiments, the hydro-gasification system further comprises a main transport path for transporting hydrogen, the main transport path being provided with a main path regulating valve which controls the flow rate of the main transport path and then distributes it evenly to the respective first transport pipes 2. Each second conveying pipeline 3 is controlled by an independent oxygen regulating valve, and the quality of the pulverized coal conveyed in the third conveying pipeline 4 is regulated by controlling the pressure difference between the material sending tank and the gasification furnace 1.
The outlet temperature of each nozzle 7 is firstly calculated according to the change of the pulverized coal conveying quantity and the proportion set by the first control component 5 to obtain the hydrogen flow, and the hydrogen flow is adjusted by the main flow adjusting valve to keep the hydrogen-coal ratio unchanged; then according to the flow of the hydrogen, the flow of the oxygen is calculated and obtained through the second control component 6, the flow of the oxygen is adjusted through the oxygen adjusting valve of each nozzle 7, and the reaction temperature of the outlet of each nozzle 7 is controlled, so that the independent adjustment of the input amount of the oxygen at the position of each nozzle 7 is realized, when the input amount of the hydrogen is changed, the input amount of the oxygen can be adjusted in time according to the input amount of the hydrogen, and the temperature of the hydrogen in the gasification furnace 1 is kept stable.
Fig. 3 is a schematic structural diagram of a nozzle according to an embodiment of the disclosure. As shown in fig. 3, specifically, each nozzle 7 is provided with a feed passage 73, a plurality of first air inlet passages 71 and a plurality of second air inlet passages 72, the first air inlet passages 71, the second air inlet passages 72 and the feed passage 73 are not communicated with each other, and the first air inlet passages 71 are surrounded outside the second air inlet passages 72.
In this embodiment, the feeding channel 73 is disposed at the center of the nozzle 7, the first air inlet channel 71 is uniformly disposed at the outer peripheral side of the feeding channel 73 with the center of the feeding channel 73 as the center of circle, the second air inlet channel 72 is disposed inside the first air inlet channel 71, and the axes of the first air inlet channel 71 and the second air inlet channel 72 are overlapped, so that hydrogen and oxygen can meet and generate a combustion reaction at the air outlets of the first air inlet channel 71 and the second air inlet channel 72, thereby saving the space required by the meeting of hydrogen and oxygen, heating the pulverized coal in time, and improving the heating efficiency of the pulverized coal; moreover, a plurality of first air inlet channels 71 and second air inlet channels 72 are arranged around the circumferential direction of the feeding channel 73 at the central position, and combustion reaction occurs at the air outlet of each first air inlet channel 71, so that the temperature rise efficiency of pulverized coal is improved.
In some embodiments, the axis of each nozzle 7 is arranged to point to the axis of the gasifier 1, and a material collision region is formed below each nozzle 7, so that hydrogen and coal powder collide with each other in the gasifier 1, and the hydrogen and the coal powder are sufficiently mixed, so that further reaction is performed, and light coal tar is generated. Wherein the axes of all nozzles 7 may intersect at the same position.
Coal tar is included in the material that coal powder and hydrogen reaction generated before coal powder and hydrogen collide with each other, the material collides with the back, the material continues to react with hydrogen and releases heat, make the regional temperature of nozzle 7 is kept away from to the collision point rise along with the going on of reaction, in order to avoid the regional rate of rise of temperature that material and hydrogen reaction caused, lead to a large amount of coal tar to be cracked into methane, the lateral wall of gasifier 1 is provided with air inlet 8, and air inlet 8 is located one side of nozzle 7 is kept away from in the collision district of hydrogen and coal powder, namely, air inlet 8 is located the below in material collision district.
The gas inlet 8 is communicated with the main conveying path, the hydrogen of the main conveying path is heated high-temperature hydrogen, namely the temperature of the hydrogen input by the gas inlet 8 is not lower than the ignition point of the hydrogen, and as the ambient temperature of the area of the collision area far away from the nozzle 7 is higher than the ignition point of the hydrogen, the area corresponding to the gas inlet 8 can be cooled by introducing the high-temperature hydrogen, so that the temperature of the area is prevented from being too high, and the yield of the light coal tar is improved; and moreover, the high-temperature hydrogen is introduced, so that the content of the hydrogen in the collision area and the area close to the nozzle 7 is increased, the contact area of the pulverized coal and the hydrogen is further increased, and the reaction rate of the pulverized coal is increased.
In some embodiments, a heating device 9 is further included, the heating device 9 being in communication with the first delivery conduit 2.
The heating device 9 is used for heating the hydrogen, so that the temperature of the hydrogen is not lower than the ignition point of the hydrogen when the hydrogen is introduced into the gasification furnace 1, and the hydrogen and the oxygen are ensured to generate combustion reaction in the gasification furnace 1.
In particular, the heating means 9 are in communication with the main delivery circuit to ensure that the temperature of the hydrogen inside each first delivery duct 2 is not lower than its own ignition point.
Specifically, the gasifier 1 is further provided with a raw gas outlet 11 and a water inlet 10, after the coal powder reacts with the hydrogen for a period of time, cold water is introduced into the gasifier 1 through the water inlet 10, the temperature at the raw gas outlet 11 is adjusted to terminate the hydrogenation reaction, the reaction time is controlled, and the coal tar generated in the gasifier 1 is prevented from being cracked into methane, so that the oil yield of the system is improved.
FIG. 4 is a schematic flow diagram of a hydro-gasification process according to an embodiment of the disclosure. As shown in fig. 4, the present disclosure also provides a hydro-gasification method, which may be performed by all or part of the hydro-gasification system provided in the foregoing embodiments, and specifically includes:
step S101: the gasification furnace 1 is charged with hydrogen of a first mass and oxygen of a second mass.
Specifically, the first mass of hydrogen is conveyed to the gasification furnace 1 through the first conveying pipeline 2 and the first air inlet channel 71 of the nozzle 7, the second mass of oxygen is conveyed to the gasification furnace 1 through the second conveying pipeline 3 and the second air inlet channel 72 of the nozzle 7, so that part of hydrogen and oxygen are combusted in the gasification furnace 1 to release heat, the temperature in the gasification furnace 1 is increased, the gasification furnace 1 is preheated, the pulverized coal is conveyed to the gasification furnace 1 to react with the hydrogen, and the pulverized coal waste is avoided.
Step S102: and introducing coal powder into the gasification furnace 1.
Specifically, the pulverized coal is sequentially conveyed into the gasification furnace 1 through the third conveying pipe 4 and the feeding passage 73 of the nozzle. In the step S102, the introduction of hydrogen and oxygen is maintained, and the pulverized coal is introduced into the gasifier 1, and the pulverized coal reacts with the high-temperature hydrogen to generate the coal tar.
Step S103: and introducing hydrogen with a third mass into the gasification furnace 1 so that the ratio of the mass of the hydrogen in the gasification furnace 1 to the mass of the pulverized coal is within a first preset range, wherein the mass of the hydrogen is the sum of the first mass and the third mass.
In the step S103, according to the quality of the pulverized coal fed into the gasification furnace 1, the first control component 5 is adjusted to adjust the ventilation amount of the first conveying pipeline 2, and hydrogen of the third quality is fed, so as to adjust the quality of the hydrogen fed into the gasification furnace 1, that is, the quality of the hydrogen fed into the gasification furnace 1 is the sum of the hydrogen of the first quality and the hydrogen of the third quality, thereby ensuring that sufficient hydrogen reacts with the pulverized coal in the gasification furnace 1.
Step S104: and introducing fourth mass of oxygen into the gasification furnace 1 so that the ratio of the mass of the hydrogen to the mass of the oxygen in the gasification furnace 1 is within a second preset range, wherein the mass of the oxygen is the sum of the second mass and the fourth mass.
In the step S104, the second control part 6 is adjusted according to the quality of the introduced hydrogen, the ventilation amount of the second conveying pipeline 3 is changed, and the fourth quality of oxygen is introduced, so as to adjust the quality of the oxygen introduced into the gasification furnace 1, that is, the quality of the oxygen introduced into the gasification furnace 1 is the sum of the second quality of hydrogen and the fourth quality of oxygen, so as to heat the temperature of the hydrogen in the gasification furnace 1 to the preset temperature range, and keep the temperature within the preset temperature range.
Through the input according to the buggy input volume adjust the input of hydrogen, guaranteed to have sufficient hydrogen and buggy contact reaction in gasifier 1, and through the input according to the quality control oxygen of hydrogen, guaranteed that the temperature of hydrogen stably keeps in predetermineeing temperature range, avoided the influence of the reflux that the clash produced to oxygen input, thereby realized the accurate control to hydrogen temperature in gasifier 1, the rate of rise of temperature of buggy has been guaranteed, thereby the output of coal tar when having improved hydrogen and buggy reaction, gasification system's oil yield has been improved.
Specifically, before introducing the first mass of hydrogen and the second mass of oxygen into the gasification furnace 1, the method further includes: the hydrogen gas is heated. And the temperature of the heated hydrogen is not lower than the preset value of the temperature of the hydrogen, wherein the preset value can be the ignition point of the hydrogen.
In the above steps, the temperature of the hydrogen is increased to be not lower than the preset value, and the preset value of the temperature of the hydrogen can be not lower than the ignition point of the hydrogen, so that the hydrogen can be subjected to a combustion reaction when being introduced into the gasification furnace 1 and meeting with the oxygen, heat is released, and the hydrogen which is not subjected to the combustion reaction is heated, so that the ambient temperature of the reaction of the pulverized coal and the hydrogen is increased, and the reaction efficiency of the pulverized coal and the hydrogen is increased.
Specifically, before heating the hydrogen gas, the method further comprises the following steps: and determining the mass ratio of the first mass of hydrogen to the second mass of oxygen fed into the gasification furnace.
Before the reaction starts, the mass ratio of the hydrogen with the first mass to the oxygen with the second mass is set, then the hydrogen with the first mass is heated and conveyed into the gasification furnace 1, so that the hydrogen reacts with the oxygen to increase the temperature in the gasification furnace 1, and meanwhile, the gasification furnace 1 is filled with high-temperature hydrogen to ensure the heating rate of the pulverized coal after the pulverized coal is added into the gasification furnace 1, ensure the pulverized coal and the hydrogen to fully react, and avoid the waste of the pulverized coal.
Specifically, the method further includes, after introducing oxygen of a fourth mass into the gasification furnace 1: and (4) collecting the temperature below the material collision area, and introducing hydrogen when the temperature is higher than a set temperature.
In order to prevent the output of the light coal tar from being reduced due to overhigh temperature of an area below the collision area, a temperature monitoring part is arranged in the area to monitor the real-time temperature of the area, and when the real-time temperature is higher than the preset highest temperature, hydrogen is introduced to realize the effect of reducing the temperature of the area, so that the output of the light coal tar is improved.
In the above step, hydrogen is introduced into the area below the collision area through the gas inlet 8, the gas inlet 8 is communicated with the main conveying path, the hydrogen in the main conveying path is heated high-temperature hydrogen, that is, the temperature of the hydrogen input from the gas inlet 8 is not lower than the preset value of the hydrogen temperature, and since the temperature below the collision area is higher than the preset value of the hydrogen temperature, the area corresponding to the gas inlet 8 can be cooled by introducing the high-temperature hydrogen, so as to prevent the temperature of the area from being too high, and thus the yield of the light coal tar is improved; and moreover, the high-temperature hydrogen is introduced, so that the content of the hydrogen in the collision area and the area close to the nozzle 7 is increased, the contact area of the pulverized coal and the hydrogen is further increased, and the reaction rate of the pulverized coal is increased.
And finally, after the coal powder reacts for a period of time, introducing cold water into the gasification furnace 1, adjusting the temperature of an outlet of the gasification furnace 1 to terminate the hydrogenation reaction, controlling the reaction time, and avoiding the coal tar from cracking to generate methane, thereby improving the oil yield of the system.
Other technical features are the same as those of the embodiment of the system and can bring about the same or similar technical effects, and are not repeated herein, and specific reference may be made to the description of the embodiment.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A method of hydrogasification using a hydrogasification system, the method comprising:
introducing hydrogen with a first mass and oxygen with a second mass into the gasification furnace (1);
introducing coal powder into the gasification furnace (1);
introducing hydrogen with a third mass into the gasification furnace (1) so that the ratio of the mass of the hydrogen in the gasification furnace (1) to the mass of the pulverized coal is within a first preset range, wherein the mass of the hydrogen is the sum of the first mass and the third mass, and the mass of the hydrogen introduced into the gasification furnace (1) is adjusted according to the mass of the pulverized coal introduced into the gasification furnace (1);
and introducing fourth mass of oxygen into the gasification furnace (1) so that the ratio of the mass of the hydrogen to the mass of the oxygen in the gasification furnace (1) is within a second preset range, wherein the mass of the oxygen is the sum of the second mass and the fourth mass, and the mass of the oxygen introduced into the gasification furnace (1) is adjusted according to the mass of the hydrogen introduced into the gasification furnace (1).
2. The hydrogasification process of claim 1, further comprising, before the passing of the first mass of hydrogen and the second mass of oxygen into the gasifier (1):
the hydrogen gas is heated.
3. The hydro-gasification method of claim 2, further comprising, prior to the heating the hydrogen gas:
and determining the mass ratio of the first mass of hydrogen to the second mass of oxygen fed into the gasification furnace (1).
4. The hydrogasification process according to claim 1, further comprising, after the feeding of the fourth mass of oxygen into the gasification furnace (1):
and (4) collecting the temperature below the material collision area, and introducing hydrogen when the temperature is higher than a set temperature.
5. The hydrogasification process of claim 1, wherein the hydrogasification system comprises: the system comprises a gasification furnace (1), a first conveying pipeline (2) for conveying hydrogen into the gasification furnace (1), a second conveying pipeline (3) for conveying oxygen into the gasification furnace (1) and a third conveying pipeline (4) for conveying coal powder into the gasification furnace (1); wherein the content of the first and second substances,
a first control component (5) is arranged between the first conveying pipeline (2) and the third conveying pipeline (4) and is used for controlling the mass ratio of the hydrogen and the pulverized coal conveyed into the gasification furnace (1);
and a second control component (6) is arranged between the first conveying pipeline (2) and the second conveying pipeline (3) and is used for controlling the mass ratio of the hydrogen and the oxygen conveyed into the gasification furnace (1).
6. The hydrogasification process according to claim 5, wherein the gasifier (1) is provided with a plurality of nozzles (7), each nozzle (7) comprising a first gas inlet channel (71), a second gas inlet channel (72) and a feed channel (73), the first gas inlet channel (71) communicating with the first transfer duct (2), the second gas inlet channel (72) communicating with the second transfer duct (3), the feed channel (73) communicating with the third transfer duct (4).
7. The hydrogasification process of claim 6, wherein the first inlet channel (71), the second inlet channel (72), and the inlet channel (73) are not in communication with each other.
8. The hydrogasification process of claim 7, wherein the first inlet channel (71) is enclosed outside the second inlet channel (72).
9. The hydrogasification process according to claim 6, wherein the axis of each nozzle (7) is arranged pointing towards the axis of the gasifier (1) to form a material collision zone below the nozzle (7).
10. The hydrogasification process according to claim 9, wherein the side wall of the gasifier (1) is provided with an air inlet (8), the air inlet (8) being located below the material collision zone.
11. The hydrogasification process according to any one of claims 5 to 10, wherein the hydrogasification system further comprises a heating device (9), the heating device (9) being in communication with the first transfer conduit (2).
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| US6685754B2 (en) * | 2001-03-06 | 2004-02-03 | Alchemix Corporation | Method for the production of hydrogen-containing gaseous mixtures |
| CN102892869B (en) * | 2010-04-16 | 2014-08-20 | 新日铁住金工程技术株式会社 | Coal gasification system and coal gasification method |
| WO2013053017A1 (en) * | 2011-10-13 | 2013-04-18 | Linc Energy Ltd | System and method for integrated enhanced oil recovery |
| CN103529699B (en) * | 2013-10-28 | 2016-01-06 | 中国科学院自动化研究所 | A kind of furnace temperature Learning Control Method of coal gasifier system |
| CN203715582U (en) * | 2013-12-27 | 2014-07-16 | 新奥科技发展有限公司 | Multi-nozzle gasification furnace |
| CN105132056B (en) * | 2015-08-25 | 2018-07-06 | 中国五环工程有限公司 | Lignite steam hydro-gasification process for producing natural and its system |
| CN105861070A (en) * | 2016-06-15 | 2016-08-17 | 安徽新生力生物科技有限公司 | Technology for synthesizing methanol dimethyl ether through biomass gasification |
| DE102016218855A1 (en) * | 2016-09-29 | 2018-03-29 | Siemens Aktiengesellschaft | Freiraumquench with self-cooling, mehrmanteligem central tube |
| CN206783614U (en) * | 2017-05-15 | 2017-12-22 | 新能能源有限公司 | A kind of novel stacked coal gasification reactor |
| CN108795505B (en) * | 2018-06-29 | 2020-07-14 | 新奥科技发展有限公司 | Coal powder hydro-gasification method and system |
| CN108774549B (en) * | 2018-08-29 | 2023-10-24 | 中国石油化工股份有限公司 | Entrained-flow pulverized coal hydro-gasification furnace, hydro-gasification system and hydro-gasification method |
| CN109575994B (en) * | 2018-12-29 | 2020-12-25 | 西北化工研究院有限公司 | Coal and gaseous hydrocarbon coupling gasification method for adjusting hydrogen-carbon ratio of synthesis gas |
| CN111154517A (en) * | 2019-04-12 | 2020-05-15 | 新能能源有限公司 | Coal catalytic gasification safety monitoring system and monitoring method thereof |
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