阅读说明：本技术 一种水煤浆气流床气化用煤资源的圈定方法 (Coal resource delineation method for coal water slurry entrained flow gasification ) 是由 张建强 宁树正 黄少青 于 2019-10-31 设计创作，主要内容包括：本发明实施例提供一种水煤浆气流床气化用煤资源的圈定方法,该方法包括：获取勘查区中满足第一预设条件、第二预设条件、第三预设条件、第四预设条件和第五预设条件的所有目标钻孔,根据每一目标钻孔,确定所述勘查区中水煤浆气流床气化用煤资源的圈定范围。本发明实施例提供一种水煤浆气流床气化用煤资源的圈定方法,准队目标水煤浆气化用煤适用的煤炭资源量圈定方法精度不高,不易操作,本申请通过选取水煤浆气流床气化用煤合适的煤炭资源的类型,可以将煤炭资源和煤炭深加工利用有效结合,为水煤浆气流床煤化工基地选址提供建议。(The embodiment of the invention provides a method for delineating coal resources for coal water slurry entrained flow gasification, which comprises the following steps: acquiring all target drill holes which meet a first preset condition, a second preset condition, a third preset condition, a fourth preset condition and a fifth preset condition in an exploration area, and determining a delineation range of coal resources for gasification of a coal water slurry entrained flow in the exploration area according to each target drill hole. The embodiment of the invention provides a method for delineating coal resources for coal water slurry entrained flow bed gasification, which is characterized in that the accuracy of the method for delineating the quantity of the coal resources applicable to target coal water slurry gasification is not high, and the method is not easy to operate.)

1. A coal resource delineation method for coal water slurry entrained flow gasification is characterized by comprising the following steps:

acquiring all target drill holes in an investigation area, wherein the target drill holes meet a first preset condition, a second preset condition, a third preset condition, a fourth preset condition and a fifth preset condition, for any target drill hole, the first preset condition is that the proportion of lignite and low-order bituminous coal in any target drill hole is larger than a first preset proportion, the second preset condition is that the coal ash meltability flowing temperature of a coal sample in any target drill hole is not larger than a first preset value, the third preset condition is that the moisture of the coal sample in any target drill hole is not larger than a second preset proportion, the fourth preset condition is that the Hardgman grindability index of the coal sample in any target drill hole is not smaller than a second preset value, and the fifth preset condition is that the ash content of the coal sample in the first target drill hole is not larger than the third preset proportion;

and determining the delineation range of coal resources for gasification of the coal water slurry entrained flow bed in the exploration area according to each target drilling hole.

2. The method for delineating a coal resource for entrained flow gasification of a coal-water slurry according to claim 1, further comprising:

acquiring all reference drill holes in the investigation area which meet the second preset condition and the third preset condition, and determining a reference area according to all the reference drill holes;

acquiring the average coal seam thickness of all target drill holes;

acquiring the average apparent density of the coal bed of the target drilling hole;

and acquiring the coal resource reserves for gasifying the coal water slurry entrained flow bed in the surveying area according to the reference area, the average coal bed density and the average apparent density of the coal bed.

3. The method for delineating a coal resource for entrained flow gasification of a coal water slurry according to claim 2, wherein said obtaining an average coal seam thickness for all target boreholes comprises:

if the standard deviation of the coal seam thickness of each target drilling hole is not more than 1, the average coal seam thickness is the arithmetic average of the coal seam thicknesses of all the target drilling holes;

and if the standard deviation of the coal seam thickness of each target drilling hole is less than 1, removing the maximum value and the minimum value of the coal seam thickness in all the target drilling holes, wherein the average coal seam thickness is the arithmetic average value of the thicknesses of the rest coal seams.

4. The method for delineating a coal resource for entrained flow gasification of a coal water slurry according to claim 2, wherein the obtaining of the average apparent density of the coal bed in the target borehole comprises:

and taking the arithmetic mean of the apparent densities of the coal seams of all the target drill holes as the average apparent density of the coal seams.

5. The method for delineating a coal resource for entrained flow gasification of coal water slurry according to claim 4, wherein said obtaining a coal resource reserve for entrained flow gasification of coal water slurry in said survey area based on said reference area, said average coal bed density and said average apparent density of coal bed is obtained by the following formula:

Q＝S×M×D，

wherein Q represents the coal resource reserve for gasifying the coal-water slurry entrained flow, S represents the reference area, M represents the average coal bed density, and D represents the average apparent density of the coal bed.

6. The method of claim 1, wherein the first predetermined value is 1350.

7. The method of claim 1, wherein the second predetermined percentage is 10%.

8. The method for delineating a coal resource for entrained flow gasification of a coal-water slurry according to claim 1, wherein said second predetermined value is any value between 50 and 60.

9. The method of claim 1, wherein the third predetermined percentage is 10%.

10. The method for delineating a coal resource for entrained flow gasification of a coal water slurry as claimed in claim 1, wherein said target borehole is in an exploration phase.

Technical Field

The invention relates to the technical field of geological engineering, in particular to a method for delineating coal resources for coal water slurry entrained flow gasification.

Background

The coal for the coal water slurry entrained flow gasification has the advantages of simple industrial process, little environmental pollution, strong adaptability of coal types, large production capacity, high gasification pressure, high quality of synthesis gas, stable operation and the like, and the first coal water slurry gasification device is put into operation in 1993 and is used for producing methanol, synthetic ammonia, olefin, fuel oil and the like. The coal water slurry entrained flow gasification process is developed rapidly in China in recent years due to the advantages of high efficiency, energy conservation, environmental protection and the like. At present, the development, application and development of the coal water slurry entrained flow bed technology are more, but a coal resource delineation method for the coal water slurry entrained flow bed technology is still lacked. The coal water slurry entrained flow has stronger adaptability to coal types, but not all kinds of coal are suitable for the coal water slurry entrained flow.

Therefore, a method for defining coal resources for coal water slurry entrained flow gasification is needed.

Disclosure of Invention

In order to solve the problems, the embodiment of the invention provides a method for delineating coal resources for coal water slurry entrained flow gasification.

The embodiment of the invention provides a method for delineating coal resources for coal water slurry entrained flow gasification, which comprises the following steps:

acquiring all target drill holes in an investigation area, wherein the target drill holes meet a first preset condition, a second preset condition, a third preset condition, a fourth preset condition and a fifth preset condition, for any target drill hole, the first preset condition is that the proportion of lignite and low-order bituminous coal in any target drill hole is larger than a first preset proportion, the second preset condition is that the coal ash meltability flowing temperature of a coal sample in any target drill hole is not larger than a first preset value, the third preset condition is that the moisture of the coal sample in any target drill hole is not smaller than a second preset proportion, the fourth preset condition is that the Hardgman grindability index of the coal sample in any target drill hole is larger than a second preset value, and the fifth preset condition is that the ash content of the coal sample in the first target drill hole is not larger than the third preset proportion;

and determining the delineation range of coal resources for gasification of the coal water slurry entrained flow bed in the exploration area according to each target drilling hole.

Preferably, the method further comprises the following steps:

acquiring all reference drill holes in the investigation area which meet the second preset condition and the third preset condition, and determining a reference area according to all the reference drill holes;

acquiring the average coal seam thickness of all target drill holes;

acquiring the average apparent density of the coal bed of the target drilling hole;

and acquiring the coal resource reserves for gasifying the coal water slurry entrained flow bed in the surveying area according to the reference area, the average coal bed density and the average apparent density of the coal bed.

Preferably, the acquiring the average coal seam thickness of all target boreholes specifically comprises:

if the standard deviation of the coal seam thickness of each target drilling hole is not more than 1, the average coal seam thickness is the arithmetic average of the coal seam thicknesses of all the target drilling holes;

and if the standard deviation of the coal seam thickness of each target drilling hole is less than 1, removing the maximum value and the minimum value of the coal seam thickness in all the target drilling holes, wherein the average coal seam thickness is the arithmetic average value of the thicknesses of the rest coal seams.

Preferably, the acquiring the average apparent density of the coal seam of the target borehole specifically includes:

and taking the arithmetic mean of the apparent densities of the coal seams of all the target drill holes as the average apparent density of the coal seams. Preferably, the coal resource reserves for gasifying the coal water slurry entrained flow in the survey area are obtained according to the reference area, the average coal bed density and the average apparent coal bed density, and are obtained by the following formula:

Q＝S×M×D，

wherein Q represents the coal resource reserve for gasifying the coal-water slurry entrained flow, S represents the reference area, M represents the average coal bed density, and D represents the average apparent density of the coal bed.

Preferably, the first preset value is 1350.

Preferably, the second preset proportion is 10%.

Preferably, the second preset value is any value between 50 and 60.

Preferably, the third predetermined proportion is 10%.

Preferably, the target borehole is in a survey phase.

The embodiment of the invention provides a method for delineating coal resources for coal water slurry entrained flow bed gasification, which is characterized in that the accuracy of the method for delineating the quantity of the coal resources applicable to target coal water slurry gasification is not high, and the method is not easy to operate.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a flow chart of a method for delineating coal resources for coal-water slurry entrained flow gasification according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for delineating coal resources for entrained-flow gasification of a coal-water slurry according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a flowchart of a method for delineating coal resources for coal-water slurry entrained flow gasification according to an embodiment of the present invention, as shown in fig. 1, the method includes:

s1, obtaining all target drill holes in an investigation area, wherein the target drill holes meet a first preset condition, a second preset condition, a third preset condition, a fourth preset condition and a fifth preset condition, for any target drill hole, the first preset condition is that the proportion of lignite and low-order bituminous coal in any target drill hole is larger than a first preset proportion, the second preset condition is that the coal ash meltability flowing temperature of a coal sample in any target drill hole is not larger than a first preset value, the third preset condition is that the moisture of the coal sample in any target drill hole is not larger than a second preset proportion, the fourth preset condition is that the Hardgman grindability index of the coal sample in any target drill hole is not smaller than a second preset value, and the fifth preset condition is that the ash content of the coal sample in the first target drill hole is not larger than a third preset proportion;

and S2, determining the delineation range of coal resources for gasifying the coal water slurry entrained flow in the exploration area according to each target drilling hole.

Specifically, in order to survey coal resources in a survey area, a plurality of drill holes are dug in the survey area, drill holes which simultaneously meet a first preset condition, a second preset condition, a third preset condition, a fourth preset condition and a fifth preset condition are selected from all drill holes in the survey area, and the drill holes are used as target drill holes, wherein the target drill holes are the drill holes which meet the requirements of coal for gasifying a coal water slurry entrained flow.

Specifically, any one of the target drill holes is taken as an example for explanation, the first preset condition indicates that the proportion of lignite and low-order bituminous coal in all coal resources of the target drill hole is larger than a first preset proportion, the first preset proportion can be determined according to actual experience or actual conditions, if the proportion is larger than the first preset proportion, the target drill hole is mainly composed of lignite or low-order bituminous coal, the condition of coal resources for coal water slurry entrained flow gasification is preliminarily met, and if the proportion is not larger than the first preset proportion, the content of lignite and low-order bituminous coal in the target drill hole is small, the requirement of coal for coal water slurry entrained flow gasification is not met, and therefore the target drill hole is excluded.

For the second preset condition, the second preset condition is that the coal ash meltability flowing temperature of the coal sample in the target drilling hole is not more than a first preset value, and the first preset value can be determined according to actual experience or actual conditions; for a third preset condition, the third preset condition is that the moisture of the coal sample in the target drilling hole is not more than a second preset proportion, and the second preset proportion can be determined according to actual experience or actual conditions; the fourth preset condition is that the Hardgrove grindability index of the coal sample in the target drilling hole is larger than a second preset value, and the second preset value can be determined according to actual experience or actual conditions; the fifth preset condition indicates that the ash content of the coal sample in the target drilling hole is not more than a third preset proportion, and the third preset value can be determined according to actual experience or actual conditions.

The drill holes meeting the five preset conditions can be used as target drill holes in the application, and the target drill holes meet the requirements of coal for gasification of the coal water slurry entrained flow bed in the application.

The embodiment of the invention provides a method for delineating coal resources for coal water slurry entrained flow bed gasification, which is characterized in that the accuracy of the method for delineating the quantity of the coal resources applicable to target coal water slurry gasification is not high, and the method is not easy to operate.

On the basis of the above embodiment, it is preferable to further include:

acquiring all reference drill holes in the investigation area which meet the second preset condition and the third preset condition, and determining a reference area according to all the reference drill holes;

acquiring the average coal seam thickness of all target drill holes;

acquiring the average apparent density of the coal bed of the target drilling hole;

and acquiring the coal resource reserves for gasifying the coal water slurry entrained flow bed in the surveying area according to the reference area, the average coal bed density and the average apparent density of the coal bed.

Specifically, the resource amount of coal for gasifying the coal water slurry entrained flow bed in the exploration area can be determined according to the selected target drilling hole, and the specific determination method comprises the following steps:

firstly, acquiring all reference drill holes in a reference area, wherein the reference drill holes meet a second preset condition and a third preset condition, and the area occupied by all the reference drill holes is a reference area; an average coal seam thickness is then determined from the coal seam thicknesses in all of the target boreholes, and an average apparent coal seam density is determined from the apparent coal seam densities in all of the target boreholes.

Then, acquiring the coal resource reserves for gasifying the coal water slurry entrained flow bed in the survey area according to the average coal seam thickness, the average apparent density of the coal seam and the reference area of the target drilling hole, wherein the coal resource reserves can be obtained by the following specific method:

wherein Q represents the coal resource reserve for gasifying the coal water slurry entrained flow bed, and is a positive number, S represents a reference area, M represents the average coal bed density, and D represents the average apparent density of the coal bed

The calculation can also be performed as follows:

Q＝S×M×D，

wherein Q represents the coal resource reserve for gasifying the coal-water slurry entrained flow, S represents the reference area, M represents the average coal bed density, and D represents the average apparent density of the coal bed.

In the embodiment of the invention, the unit of Q is ten thousand tons, the unit of S is ten thousand square meters, the unit of M is meters, and the unit of D is tons per cubic meter.

On the basis of the foregoing embodiment, preferably, the acquiring the average coal seam thickness of all target boreholes specifically includes:

if the standard deviation of the coal seam thickness of each target drilling hole is not more than 1, the average coal seam thickness is the arithmetic average of the coal seam thicknesses of all the target drilling holes;

and if the standard deviation of the coal seam thickness of each target drilling hole is less than 1, removing the maximum value and the minimum value of the coal seam thickness in all the target drilling holes, wherein the average coal seam thickness is the arithmetic average value of the thicknesses of the rest coal seams.

If the number of the target drilling holes is n, the thickness of the coal seam of each target drilling hole is m ₁、m ₂、……、m _nAnd if the standard deviation is not more than 1, the average coal seam thickness is the arithmetic mean value of the thicknesses of all the target drilling coal seams, namely:

if the standard deviation is less than 1, the maximum value and the minimum value of all the coal seam thicknesses are removed, and the arithmetic mean of the residual coal seam thicknesses is used as the average coal seam thickness of the target drilling hole.

On the basis of the foregoing embodiment, preferably, the acquiring the average apparent density of the coal seam of the target borehole specifically includes:

and taking the arithmetic mean of the apparent densities of the coal seams of all the target drill holes as the average apparent density of the coal seams.

Specifically, the arithmetic mean of the apparent densities of the coal seams of all the target boreholes is taken as the average apparent density of the coal seams.

On the basis of the above embodiment, preferably, the first preset value is 1350. In this embodiment of the present invention, the second predetermined value is 1350.

On the basis of the above embodiment, preferably, the second preset proportion is 10%.

On the basis of the above embodiment, preferably, the second preset value is any value between 50 and 60. Specifically, in the embodiment of the present invention, the second preset value may be one of 50, 52, 54, 56, and 60.

On the basis of the above embodiment, preferably, the third preset proportion is 10%.

On the basis of the above embodiments, preferably, the target borehole is a borehole in an investigation phase.

In particular, in embodiments of the invention, the target borehole is a borehole in an exploration phase, and boreholes in other phases are not considered.

FIG. 2 is a flow chart of a method for delineating coal resources for entrained-flow gasification of a coal-water slurry according to another embodiment of the present invention, as shown in FIG. 2:

the method comprises the steps of firstly obtaining test data of each drill hole in a survey stage in a survey area from a coal quality database, selecting drill holes meeting a first preset condition from all drill holes by taking lignite and low-order bituminous coal as selection indexes according to the test data, and taking the drill holes not meeting the first preset condition as coal for gasification of the non-coal water slurry entrained flow bed.

And then selecting the drill holes meeting the second preset condition, the third preset condition, the fourth preset condition and the fifth preset condition from the drill holes meeting the first preset condition as target drill holes, wherein in the embodiment of the invention, the value of the first preset numerical value is 1350 ℃, the second preset proportion is 10%, the second preset numerical value is 50% and the third preset proportion is 10%, and the drill holes which cannot meet the conditions or cannot meet the conditions at the same time are used as coal for gasifying the non-coal water slurry entrained flow bed.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.