CN216808711U

CN216808711U - Powdered coal hydrogasification and biomass pyrolysis coupling equipment

Info

Publication number: CN216808711U
Application number: CN202123072836.7U
Authority: CN
Inventors: 王蕾
Original assignee: ENN Science and Technology Development Co Ltd
Current assignee: ENN Science and Technology Development Co Ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-06-24
Anticipated expiration: 2031-12-08

Abstract

The disclosure relates to a pulverized coal hydrogasification and biomass pyrolysis coupling device, comprising an entrained flow gasifier. And a second inlet for biomass to enter is formed in the middle of the side wall of the entrained-flow bed gasification furnace, and the biomass, pulverized coal and semicoke generated by gasification of hydrogen in the entrained-flow bed gasification furnace are mixed and then are subjected to pyrolysis gasification to generate biomass process gas and semicoke. Namely, the pulverized coal and the hydrogen enter the entrained-flow bed gasification furnace from the top of the entrained-flow bed gasification furnace and then undergo gasification reaction to generate the coal gasification process gas and the semicoke. The biomass enters from the middle part of the side wall of the entrained-flow bed gasification furnace, so that the air velocity of the biomass can be reduced, the mixing time of the biomass and the semicoke is prolonged, the density of the semicoke is close to that of the biomass, the biomass and the semicoke are mixed more sufficiently and are sufficiently gasified and pyrolyzed at high temperature, tar is not easy to generate, and the problems that the tar corrodes the high-temperature slag in the furnace wall of the entrained-flow bed gasification furnace in a flowing mode, the oil-gas separation is difficult and the like are solved.

Description

Powdered coal hydrogasification and biomass pyrolysis coupling equipment

Technical Field

The disclosure relates to the technical field of pulverized coal gasification, in particular to a pulverized coal hydro-gasification and biomass pyrolysis coupling device.

Background

The coal-rich, lean, low-gas and huge biomass output energy status quo and the urgent need for environmental protection in China are met, the coal and biomass resource advantages in China can be brought into play by developing the pulverized coal and biomass co-pyrolysis combustion technology, clean and efficient utilization of coal and conversion from low-grade biomass fuel to high-grade fuel can be realized, and the quality of pyrolysis liquid and gas products is improved.

However, the problems of low biomass density, difficult grinding and the like cause that large-particle biomass is difficult to be fully mixed with pulverized coal and completely pyrolyzed and gasified in the entrained-flow bed gasification furnace, and the problems that heavy tar is produced due to insufficient pyrolysis of the biomass, the entrained-flow bed is easy to corrode and damage and the like are easily caused.

SUMMERY OF THE UTILITY MODEL

To solve the technical problem or at least partially solve the technical problem, the present disclosure provides a pulverized coal hydrogasification and biomass pyrolysis coupling device.

The present disclosure provides a pulverized coal hydrogasification and biomass pyrolysis coupling device, comprising an entrained flow gasifier;

the top of the entrained-flow bed gasification furnace is provided with a first inlet for hydrogen and pulverized coal to enter, so that the hydrogen and the pulverized coal are gasified in the entrained-flow bed gasification furnace to form coal gasification process gas and semicoke; a first exhaust port for discharging the coal gasification process gas is arranged on the side wall of the entrained-flow bed gasification furnace;

and a second inlet for biomass to enter is formed in the middle of the side wall of the entrained flow gasifier, so that the biomass is mixed with the semicoke and is gasified to generate biomass process gas and semicoke.

According to an embodiment of the present disclosure, the entrained-flow gasifier includes a pulverized coal hydrogenation gasifier and a biomass gasifier; the pulverized coal hydrogenation gasification furnace is arranged above the biomass gasification furnace, and the pulverized coal hydrogenation gasification furnace is partially arranged in the biomass gasification furnace and communicated with the biomass gasification furnace.

According to an embodiment of the present disclosure, the pulverized coal hydrogenation gasification furnace includes a first furnace body section and a second furnace body section which are sequentially communicated, and the second furnace body section is located at the bottom of the first furnace body section;

the first inlet is arranged at the top of the first furnace body section, the first exhaust port is positioned on the side wall of the first furnace body section near the bottom, and the second inlet is positioned on the side wall of the second furnace body section.

According to an embodiment of the disclosure, a diameter of at least a part of the second furnace body section gradually increases in a direction along the first furnace body section to the second furnace body section.

According to an embodiment of the present disclosure, a feeding nozzle for injecting the biomass into the entrained flow gasifier is disposed at the second inlet, and a nozzle opening of the feeding nozzle is disposed obliquely with respect to a horizontal direction.

According to an embodiment of the present disclosure, the second inlet is provided in a plurality, the plurality of second inlets being arranged at intervals along a circumference of the second furnace body section; the feeding nozzles are arranged in a plurality and correspond to the second inlets one to one.

According to an embodiment of the present disclosure, a buffer member is disposed in the entrained flow gasifier, the buffer member includes a support column fixed in the entrained flow gasifier and a support plate disposed on a top of the support column, and two ends of the support plate are inclined and/or bent toward the support column.

According to an embodiment of the present disclosure, a second exhaust port through which the biomass process gas can be discharged is formed between the furnace wall of the pulverized coal hydro-gasification furnace and the furnace wall of the biomass gasification furnace, and the second exhaust port is higher than the bottom end of the second furnace body section.

According to an embodiment of the present disclosure, a bottom end of the second furnace body section is lower than a bottom end of the support plate.

According to an embodiment of the disclosure, a discharge opening for discharging the semicoke is formed in the bottom of the entrained-flow bed gasification furnace.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the present disclosure provides a pulverized coal hydrogasification and biomass pyrolysis coupling device, which comprises an entrained flow gasifier. A second inlet for biomass to enter is formed in the middle of the side wall of the entrained-flow bed gasification furnace, so that the biomass, pulverized coal and hydrogen are mixed with semicoke generated by gasification in the entrained-flow bed gasification furnace and are gasified to generate biomass process gas and semicoke. That is to say, the pulverized coal and the hydrogen gas enter the entrained-flow bed gasification furnace from the top of the entrained-flow bed gasification furnace and then undergo gasification reaction to generate the coal gasification process gas and the semicoke, and at the moment, the temperature in the entrained-flow bed gasification furnace is higher, and the biomass is not easy to generate tar at high temperature. In addition, compare in the mode that gets into from the top of entrained flow gasifier, living beings get into from the middle part of the lateral wall of entrained flow gasifier, thereby can reduce the air velocity of living beings, with this increase living beings and semicoke mixing time, and the density of semicoke itself is close with the density of living beings, thereby can make the mixture between living beings and the semicoke more abundant, thereby make living beings and semicoke intensive mixing and fully carry out gasification reaction under high temperature, thereby difficult production tar, avoid tar to flow to corrode the high temperature slag in the oven of entrained flow gasifier damage and oil-gas separation difficulty scheduling problem.

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 structural diagram of a pulverized coal hydrogasification and biomass pyrolysis coupling device according to an embodiment of the disclosure;

FIG. 2 is a schematic structural diagram of another coupled apparatus for pulverized coal hydrogasification and biomass pyrolysis according to an embodiment of the disclosure;

fig. 3 is a schematic structural diagram of a second furnace body section of the pulverized coal hydrogasification and biomass pyrolysis coupling device according to the embodiment of the disclosure.

Wherein, 1, an entrained flow gasifier; 11. a first inlet; 12. a first exhaust port; 13. a second inlet; 14. a discharge outlet; 15. a second exhaust port; 2. a pulverized coal hydrogenation gasification furnace; 21. a first furnace section; 22. a second furnace section; 3. a biomass gasification furnace; 4. a buffer member; 41. a support pillar; 42. and a support plate.

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.

The entrained-flow bed gasification furnace utilizes the jet entrainment principle in fluid mechanics to spray gasifying agents such as coal powder, hydrogen and the like into the entrained-flow bed gasification furnace, and the jet flow causes entrainment and high-temperature turbulence and continuously strengthens mixing to fully perform gasification reaction. However, the biomass has low density and is not easy to grind, and the like, so that large-particle biomass is difficult to be fully mixed with pulverized coal and completely pyrolyzed and gasified in the entrained-flow bed gasification furnace; and the retention time of the biomass in the entrained flow gasification furnace is limited, and the inside of large-particle biomass is difficult to be fully pyrolyzed to generate heavy tar.

Referring to fig. 1 to 3, the present embodiment provides a coupling device for hydrogasification and biomass pyrolysis of pulverized coal, including an entrained flow gasifier 11, which mainly utilizes the jet entrainment principle in hydrodynamics to mix materials and then perform gasification reaction, so as to fully mix biomass and pulverized coal and then perform full gasification or pyrolysis reaction, thereby reducing the yield of heavy tar and avoiding damage to the device.

The top of the entrained-flow gasifier 1 is provided with a first inlet 11 into which hydrogen and pulverized coal can enter, so that the hydrogen and the pulverized coal are gasified in the entrained-flow gasifier 1 to form coal gasification process gas and semicoke. That is, hydrogen and pulverized coal enter the entrained-flow bed gasifier 1 through the first inlet 11 and then undergo gasification reaction, the reaction conditions in the entrained-flow bed gasifier 1 are usually high-temperature and high-pressure hydrogen-rich conditions, for example, the reaction temperature is 700 ℃ to 1000 ℃ and the pressure is 5 mpa to 10 mpa, and the pulverized coal and the hydrogen react to form methane mixed gas, light aromatic oil and clean semicoke. The methane mixed gas as a coal gasification process gas can be discharged through a first exhaust port 12 on the side wall of the entrained-flow bed gasifier 1 and then separated, the separated methane can be used as a natural gas raw material, and the separated hydrogen is returned to the entrained-flow bed gasifier 1 to be used as a gasifying agent to continue the hydro-gasification reaction with the pulverized coal.

That is, while hydrogen gas required for the gasification reaction in the entrained-flow gasifier 1 is usually supplied from the outside to satisfy the requirement for the gasification reaction, in the present embodiment, hydrogen gas obtained by separating the coal gasification process gas can be continuously circulated into the entrained-flow gasifier 1, thereby realizing the recycling of hydrogen gas and saving resources.

It should be noted that hydrogen and pulverized coal can be quenched after entering the entrained-flow bed gasifier 1 for gasification reaction, and the quenched semicoke is mixed with biomass entering through a second inlet 13 arranged in the middle of the side wall of the entrained-flow bed gasifier 1 after continuously falling downward for gasification reaction to generate biomass process gas and semicoke; and the coal gasification process gas after chilling treatment is discharged through the first exhaust port 12 for subsequent separation and utilization.

In the present embodiment, the second inlet 13 for biomass to enter the entrained-flow gasifier 1 is provided in the middle of the sidewall of the entrained-flow gasifier 1, and the purpose of this is to: after the pulverized coal and the hydrogen enter the entrained-flow bed gasification furnace 1 to perform gasification reaction to generate semicoke and the like, mixing the semicoke and the biomass in the middle of the entrained-flow bed gasification furnace 1, so that impact is formed between the biomass entering through the second inlet 13 and the semicoke falling down, the falling speed of the biomass and the semicoke is reduced, and the mixing time of the biomass and the semicoke can be prolonged; and the semicoke generated after gasification is mostly macroporous and partially carbonized substances, so the particle size, the density and the like of the semicoke and the biomass are relatively close, and the semicoke and the biomass have similar flow rates, so the semicoke and the biomass are more easily and fully mixed to ensure that the subsequent gasification is more sufficient, tar is not easy to generate, and the gas calorific value and the gasification efficiency of biomass process gas generated during the gasification or pyrolysis of the biomass can also be improved.

In addition, the gasification temperature of the pulverized coal and hydrogen is high (greater than or equal to 700 ℃) when gasification reaction is carried out in the entrained flow gasifier 1, and the biomass is not easy to generate tar at high temperature, so that the yield of tar generated by biomass gasification can be reduced, even a small amount of tar generated can be adsorbed by semicoke, and the entrained flow gasifier 1 is not affected.

It should be noted that the biomass is usually pyrolyzed above 100 ℃ to produce tar, so that the tar is attached to the pulverized coal to affect the gasification effect, and the tar also takes away energy, so that the calorific value of the finally generated gas is low. The biomass is not easy to produce tar under the condition of high temperature (such as more than 700 ℃). Specifically, as shown in the following table, biomass pyrolysis can be classified into low-temperature slow pyrolysis, medium-temperature fast/medium/slow pyrolysis, high-temperature fast pyrolysis, and the like according to the heating rate and the pyrolysis final temperature of biomass, generally medium-temperature (about 500 ℃), fast pyrolysis, and extremely short gas phase residence time are mainly used to increase the yield of liquid products, and fast pyrolysis at a temperature higher than 700 ℃ is mainly based on gas products. Both increased residence time and increased temperature during pyrolysis of biomass in the table below contribute to reduced liquid yield.

In addition, the biomass can be wood and the like, has good reactivity and high hydrogen-carbon ratio and alkali metal content, so that the biomass and the semicoke are pyrolyzed and gasified together to generate hydrogen required by the coal gasification reaction, namely the biomass can be used as a good hydrogen donor.

In addition, because the biomass does not need to enter from a nozzle at the upper part of the entrained flow gasifier 1, the requirement of jet entrainment of the biomass in the entrained flow gasifier 1 on the granularity is not needed to be considered, the granularity of the biomass can be set to be between 0.25mm and 1mm, and the full pyrolysis of the biomass can be realized through the structural optimization of the entrained flow gasifier 1 of the embodiment, so that the situation that the granularity is too small and is easy to be discharged along with the coal gasification process gas or the biomass process gas can be avoided, and the situation that the granularity of the biomass and the semicoke is too large and cannot be completely pyrolyzed can be avoided.

It is noted that in order to achieve sufficient pyrolysis of mixed co-gasification of semicoke and biomass, the biomass and the addition ratio are 50% or less of the content of semicoke, and it has been found through experiments that when the ratio of semicoke to semicoke in the mixing ratio of semicoke and biomass is more than 50%, the content of hydrogen in hydrogen generated by gasification is more than 50%, and the smaller the content of biomass, the higher the hydrogen content.

In summary, in the pulverized coal hydrogasification and biomass pyrolysis coupling device provided in this embodiment, the pulverized coal and the hydrogen gas enter the entrained-flow bed gasifier 1 from the top of the entrained-flow bed gasifier 1 and then undergo a gasification reaction to generate the coal gasification process gas and the semicoke, and at this time, the temperature in the entrained-flow bed gasifier 1 is relatively high. In addition, living beings get into from the middle part of entrained flow gasifier 1's lateral wall, thereby can reduce the air velocity of living beings, with this increase living beings and semicoke's mixing time, and the density of semicoke itself is close with the density of living beings, thereby can make the mixture between living beings and the semicoke more abundant, thereby make living beings and semicoke intensive mixing and fully carry out gasification reaction under high temperature, thereby difficult production tar, avoid tar to flow to corrode the high temperature slag in the oven of entrained flow gasifier 1 and damage and the difficult scheduling problem of oil-gas separation.

In a specific implementation, referring to fig. 1 and 2, an entrained-flow gasifier 1 includes a pulverized coal hydrogenation gasifier 2 and a biomass gasifier 3; the fine coal hydrogenation gasification furnace 2 is arranged above the biomass gasification furnace 3, and the fine coal hydrogenation gasification furnace 2 is partially arranged in the biomass gasification furnace 3 and communicated with the biomass gasification furnace 3. That is, the fine coal hydro-gasification furnace 2 can generate the coal gasification process gas and the semicoke by performing the gasification reaction between the hydrogen gas and the fine coal. At this time, it can be understood that the first inlet 11 is disposed at the top of the pulverized coal hydro-gasification furnace 2, the first exhaust port 12 is disposed at a position near the bottom of the pulverized coal hydro-gasification furnace 2, and the second inlet 13 is disposed at the middle of the pulverized coal hydro-gasification furnace 2.

In concrete implementation, referring to fig. 1 and 3, the pulverized coal hydrogenation-gasification furnace 2 includes a first furnace body section 21 and a second furnace body section 22 which are sequentially communicated, and the second furnace body section 22 is located at the bottom of the first furnace body section 21, that is, the first furnace body section 21 and the second furnace body section 22 are sequentially connected and communicated in a top-down direction. The first inlet 11 is arranged on the top of the first furnace body section 21, the first exhaust port 12 is arranged on the side wall of the first furnace body section 21 and close to the bottom, the second inlet 13 is arranged on the side wall of the second furnace body section 22, namely, the second inlet 13 is lower than the first exhaust port 12, so that after the coal gasification process gas and the semicoke generated by gasification in the first furnace body section 21 are subjected to chilling treatment, the coal gasification process gas is discharged through the first exhaust port 12, and the semicoke continuously falls downwards and is mixed with biomass entering from the second inlet 13 below for gasification. The second inlet 13 is lower than the first exhaust port 12, so that the coal gasification process gas can be prevented from flowing downwards, the mixing of the biomass and the semicoke is influenced, the mixing of the semicoke and the biomass is not uniform, and the gasification reaction effect is influenced.

In a specific implementation, as shown with reference to fig. 1 and 3, at least part of the second furnace body segment 22 has a diameter that gradually increases in a direction from the first furnace body segment 21 to the second furnace body segment 22. For example, at least a portion of the second furnace section 22 may be in a horn-shaped structure as shown in fig. 1, that is, a portion of the second furnace section 22 connected to the first furnace section 21 is in a horn shape, a top end of the horn shape is a narrow-mouth section, a bottom end of the horn shape is a wide-mouth end, a portion of the second furnace section 22 far away from the first furnace section 21 is in a straight cylinder shape, and a cylinder diameter of the straight cylinder shape is an inner diameter of the wide-mouth end.

For example, the second furnace section 22 may have a horn-shaped structure that gradually increases in the direction from the first furnace section 21 to the second furnace section 22.

Arranging at least part of the second furnace body section 22 with a gradually increasing diameter helps to reduce the concentration of char per unit diameter area so that the mixing between char and biomass can be more thoroughly and uniformly. Meanwhile, the diameter of the second furnace body section 22 is gradually increased, so that the descending speed of the biomass wrapped with the semicoke can be reduced, the mixing time of the semicoke and the biomass is prolonged, and the semicoke and the biomass can be fully mixed.

In a specific implementation, as shown in fig. 1 and 3, a feeding nozzle for injecting biomass into the entrained-flow gasifier 1 is provided at the second inlet 13, and a nozzle opening of the feeding nozzle is inclined with respect to a horizontal direction. Specifically, the feeding nozzle may be disposed on the inclined surface of the second furnace body section 22, so that the feeding nozzle may be obliquely sprayed onto the semicoke after the feeding nozzle is disposed on the second furnace body section 22.

In this embodiment, the angle between the feeding nozzle and the horizontal plane may be set to be greater than 45 °, for example, 45 °. The inclination angle of the feeding nozzle is set to 45 degrees for the purpose of: if the feeding nozzle is inclined to incline, i.e. inclined to the first exhaust port 12, the biomass carried by the coal gasification process gas is directly discharged through the first exhaust port 12, so that the dust removal operation of the discharged coal gasification process gas is more complicated, and the discharged biomass pyrolysis product pollutes the coal gasification process gas. If the feeding nozzle inclines downwards in a deviation manner, namely the feeding nozzle inclines towards the bottom of the entrained-flow bed gasification furnace 1, the mixing time of the biomass and the semicoke is shortened, the semicoke and the biomass are insufficiently mixed, finally, more heavy tar is generated, the entrained-flow bed gasification furnace 1 is damaged, and the gasification efficiency and the gas heat value are not favorably improved. Therefore, the inclination angle of the feeding nozzle is set to 45 degrees, so that the biomass can be prevented from being discharged, and the biomass and the semicoke can be fully mixed.

In a specific implementation, referring to fig. 1, the second inlet 13 is provided in a plurality, and the plurality of second inlets 13 are arranged at intervals along the circumferential direction of the second furnace body section 22; a plurality of feed nozzles are provided, and the feed nozzles correspond to the second inlets 13 one to one. For example, the feeding nozzles in the present embodiment may be provided with 4 or more than 4, and 4 or more than 4 feeding nozzles may increase the supply amount of the biomass to ensure sufficient mixing of the biomass and the semicoke.

In specific implementation, as shown in fig. 1 and fig. 2, a buffer member 4 is disposed in the entrained-flow gasifier 1, the buffer member 4 includes a supporting pillar 41 fixed in the entrained-flow gasifier 1 and a supporting plate 42 disposed on the top of the supporting pillar 41, and two ends of the supporting plate 42 incline and/or bend toward the supporting pillar 41.

That is to say, in order to further increase the mixing time of semicoke and living beings for mix more fully even, consequently can make semicoke and living beings impact after mixing can fall to the backup pad 42 through setting up bolster 4, and slowly slide on the backup pad 42 and finally drop down, with this extension mixing time, and reduce the falling speed, be favorable to semicoke dispersion and with living beings intensive mixing.

In one implementation, as shown in fig. 1, the support plate 42 may be two sub-support plates symmetrically disposed along the support column 41, both sub-support plates being inclined downward with respect to the support column 41. In another implementation, as shown in fig. 2, the support plate 42 may be an arc-shaped plate member protruding in a direction away from the support column 41. The shape and structure of the supporting plate 42 can be set according to actual needs, and this embodiment is not limited in this respect.

In addition, in the present embodiment, by providing the support plate 42, the biomass process gas generated by gasifying the biomass and the char can be discharged from the second exhaust port 15 formed between the furnace wall of the pulverized coal hydrogenation gasifier 2 and the furnace wall of the biomass gasifier 3, so that the biomass process gas generated by gasifying the biomass or the biomass and the char is prevented from flowing upward into the pulverized coal hydrogenation gasifier 2, that is, the backflow or backflow does not occur, and even if the backflow occurs, the backflow is only on the lower surface of the support plate 42 and does not affect the gas in the pulverized coal hydrogenation gasifier 2.

Specifically, as shown in fig. 1 and 2, a second exhaust port 15 through which the biomass process gas can be discharged is formed between the furnace wall of the pulverized coal hydro-gasification furnace 2 and the furnace wall of the biomass gasification furnace 3. That is, the outer diameter of the pulverized coal hydrogenation gasification furnace 2 is smaller than the inner diameter of the biomass gasification furnace 3, so that the bottom part of the pulverized coal hydrogenation gasification furnace 2 is embedded in the biomass gasification furnace 3, an interlayer gap is formed between the furnace wall of the pulverized coal hydrogenation gasification furnace 2 and the furnace wall of the biomass gasification furnace 3, and the interlayer gap forms a second exhaust port 15 for discharging biomass process gas, so that the biomass process gas generated after the gasification reaction of biomass and semicoke can be discharged through the second exhaust port 15 for subsequent separation, which can refer to the separation and utilization process of the gasification process gas specifically; and the generated semicoke can be discharged through a discharge port 14 at the bottom of the biomass gasification furnace 3.

In this embodiment, referring to fig. 1, the second exhaust port 15 may be further disposed higher than the bottom end of the second furnace body section 22, so that the biomass process gas generated after the gasification of the biomass and the semicoke is exhausted from the second exhaust port 15.

In addition, the bottom end of the second furnace body section 22 is lower than the bottom end of the support plate 42, so as to prevent the mixed semicoke and biomass from being directly discharged through the second exhaust port 15, and to enable the biomass process gas to flow upwards and then be discharged, thereby facilitating the gasified biomass (mainly ash) to settle down from the biomass process gas, so as to facilitate the subsequent purification or separation of the biomass process gas.

In addition, a second exhaust port 15 is formed in an interlayer gap between the furnace wall of the pulverized coal hydrogenation gasification furnace 2 and the furnace wall of the biomass gasification furnace 3, so that the discharge amount of biomass process gas can be reduced, and sufficient time is provided for the working period of semicoke and biomass.

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

1. The coupling equipment for the pulverized coal hydro-gasification and biomass pyrolysis is characterized by comprising an entrained flow gasifier (1);

a first inlet (11) for hydrogen and pulverized coal to enter is formed in the top of the entrained-flow bed gasification furnace (1), so that the hydrogen and the pulverized coal are gasified in the entrained-flow bed gasification furnace (1) to form coal gasification process gas and semicoke; a first exhaust port (12) for discharging the coal gasification process gas is arranged on the side wall of the entrained-flow bed gasification furnace (1);

and a second inlet (13) for biomass to enter is formed in the middle of the side wall of the entrained-flow bed gasification furnace (1), so that the biomass is mixed with the semicoke and is gasified to generate biomass process gas and semicoke.

2. The pulverized coal hydrogasification and biomass pyrolysis coupling device according to claim 1, wherein the entrained flow gasifier (1) comprises a pulverized coal hydrogasification furnace (2) and a biomass gasifier (3); the pulverized coal hydrogenation gasification furnace (2) is arranged above the biomass gasification furnace (3), and the pulverized coal hydrogenation gasification furnace (2) is partially arranged in the biomass gasification furnace (3) and communicated with the biomass gasification furnace (3).

3. The pulverized coal hydrogasification and biomass pyrolysis coupling equipment according to claim 2, wherein the pulverized coal hydrogasification furnace (2) comprises a first furnace body section (21) and a second furnace body section (22) which are communicated in sequence, and the second furnace body section (22) is positioned at the bottom of the first furnace body section (21);

the first inlet (11) is located at the top of the first furnace section (21), the first exhaust port (12) is located on the sidewall of the first furnace section (21) near the bottom, and the second inlet (13) is located on the sidewall of the second furnace section (22).

4. The pulverized coal hydrogasification and biomass pyrolysis coupled device according to claim 3, wherein at least a portion of the second furnace body section (22) gradually increases in diameter in a direction from the first furnace body section (21) to the second furnace body section (22).

5. The pulverized coal hydrogasification and biomass pyrolysis coupling device according to claim 4, wherein a feeding nozzle for injecting the biomass into the entrained-flow gasifier (1) is provided at the second inlet (13), and a nozzle of the feeding nozzle is arranged obliquely with respect to a horizontal direction.

6. The pulverized coal hydrogasification and biomass pyrolysis coupling device according to claim 5, wherein the second inlet (13) is provided in plurality, and the plurality of second inlets (13) are provided at intervals along a circumference of the second furnace body section (22); the feeding nozzles are arranged in a plurality and correspond to the second inlets (13) one by one.

7. The coupling equipment for pulverized coal hydrogasification and biomass pyrolysis according to any one of claims 3 to 6, wherein a buffer (4) is provided in the entrained-flow gasifier (1), the buffer (4) includes a supporting pillar (41) fixed in the entrained-flow gasifier (1) and a supporting plate (42) provided on top of the supporting pillar (41), and both ends of the supporting plate (42) are inclined and/or bent toward the supporting pillar (41).

8. The coupling equipment for pulverized coal hydrogasification and biomass pyrolysis according to claim 7, wherein a second exhaust port (15) for discharging the biomass process gas is formed between the furnace wall of the pulverized coal hydrogasification furnace (2) and the furnace wall of the biomass gasification furnace (3), and the second exhaust port (15) is higher than the bottom end of the second furnace body section (22).

9. The pulverized coal hydrogasification and biomass pyrolysis coupling device of claim 8, wherein a bottom end of the second furnace body section (22) is lower than a bottom end of the support plate (42).

10. The coupling equipment for the hydrogasification and biomass pyrolysis of pulverized coal as defined in any one of claims 1 to 6, wherein a discharge opening (14) for discharging the semicoke is formed at the bottom of the entrained flow gasifier (1).