CN112903519A - System and method for rapidly measuring and calculating desorption amount of coal bed gas - Google Patents
System and method for rapidly measuring and calculating desorption amount of coal bed gas Download PDFInfo
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Abstract
The application provides a system and a method for rapidly measuring and calculating the amount of coal bed gas capable of being desorbed. The system is used for determining the gas limit desorbable amount of a target coal seam, and comprises the following components: the coal sample tank is connected with the air inlet of the measuring device through a desorption pipeline and is used for storing the coal sample of the target coal bed; the measurement device includes: a programmable logic controller and a flow sensor; the flow sensor is in communication connection with the programmable logic controller, is arranged in the measuring device and is used for monitoring the flow of gas diffused from the coal sample tank into the measuring device in real time and sending flow monitoring data to the programmable logic controller; the programmable logic controller is written with a gas dynamic diffusion simplified model in advance, and the limit desorbable amount of the gas of the coal sample in the preset diffusion time can be calculated according to the flow monitoring data, the sampling time and the weight of the coal sample in the coal sample tank, so that the intelligent and rapid measurement and calculation of the desorbable amount of the gas in the coal bed can be realized.
Description
Technical Field
The application relates to the technical field of coal bed gas content measurement, in particular to a system and a method for quickly measuring and calculating the desorption amount of coal bed gas.
Background
The coal bed gas content is composed of the gas desorption amount and the gas residual amount, and the gas residual amount can be determined in a laboratory through air extraction, crushing and chromatographic analysis or directly calculated by utilizing a Langmuir monomolecular layer adsorption model. In terms of the current application, the measurement and calculation precision of the gas residual quantity can completely meet the production requirement no matter through laboratory measurement or model calculation, and the technical difficulty does not exist. In the underground production field of a coal mine, gas gushing out from a mining working face is derived from the gas desorption amount of coal, and the desorption capability determines the gas gushing out strength of the working face. At present, a means for acquiring the coal bed gas desorption amount needs to go through two steps, a desorption instrument is used for measuring the accumulated desorption amount of the coal sample gas after the first on-site sampling, and the second gas loss amount compensation model is used for back-calculating the gas loss amount in the sampling process. The sum of the accumulated desorption amount of the gas and the loss amount of the gas is the total amount of the gas which can be desorbed from the coal.
Common gas loss compensation methods include a method and a power function method, the basic theories constructed by the method and the power function method are processed according to a classical homogeneous coal particle methane diffusion model (hereinafter referred to as a 'classical model'), the physical meaning of the method depends on the flow process of methane in coal particles as a diffusion behavior, and the method follows the diffusion law. With the continuous abundance of experimental testing means, many scholars have found that the diffusion coefficient is larger at the initial stage of coal sample methane diffusion, and gradually decreases with the increase of diffusion time, that is, at the early stage of coal particle methane diffusion, the methane diffusion coefficient is larger than the average diffusion coefficient, and at the later stage the diffusion coefficient is smaller than the average diffusion coefficient, and the diffusion coefficient is gradually decreased. The diffusion coefficient of methane obtained under different experimental conditions is not a constant value, and has a change rule of gradual attenuation along with the time extension, and the reduction amplitude is also larger. The diffusion coefficient adopted by the classical model is still a constant and unchangeable average diffusion coefficient, the deviation of the calculated gas loss amount and an actual measurement value is large, and the diffusion process of methane in a coal matrix cannot be well described.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The application aims to provide a system and a method for rapidly measuring and calculating the desorption amount of coal bed gas, so as to solve or relieve the problems in the prior art.
In order to achieve the above purpose, the present application provides the following technical solutions:
the application provides a but coal seam gas desorption volume fast measuring and calculating system for but carry out spot test to the gas limit desorption volume in target coal seam, include: the coal sample tank is connected with the air inlet of the measuring device through a desorption pipeline and is used for storing the coal sample of the target coal bed; the assay device comprises: a programmable logic controller and a flow sensor; the flow sensor is in communication connection with the programmable logic controller, is arranged in the measuring device and is used for monitoring the desorption flow of the gas diffused into the measuring device through the desorption pipeline and sending flow monitoring data to the programmable logic controller; a gas dynamic diffusion simplified model is written in the programmable logic controller in advance, and the gas limit desorbable quantity of the coal sample within preset diffusion time can be calculated according to the flow monitoring data, the sampling time and the weight of the coal sample in the coal sample tank; the sampling time is the time from the beginning of receiving the coal sample from the coal sample tank to the monitoring of the gas desorption flow by the flow sensor, and the gas dynamic diffusion simplified model is as follows:
wherein t is diffusion time in seconds; qtThe desorption amount of the gas at the time t is in unit of cubic centimeter per gram; q∞Is the gas limit desorbable amount, which is expressed in cubic centimeters per gram; a is the maximum radius of the coal sample, and the unit is centimeter; d0Characterizing the initial diffusion coefficient of gas in the coal sample when t is 0, with the unit being square centimeters per second; epsilon represents the attenuation coefficient of gas diffusion, and the unit is one-fourth per second.
Optionally, in any embodiment of the present application, a first measurement pipeline and a second measurement pipeline are disposed in the measurement device, one end of the first measurement pipeline and one end of the second measurement pipeline are both communicated with an air inlet of the measurement device, and the other end of the first measurement pipeline and the other end of the second measurement pipeline are both communicated with an air outlet of the measurement device; a first electromagnetic valve is arranged on the first measuring pipeline and a second electromagnetic valve is arranged on the second measuring pipeline close to the air inlet of the measuring device, the first electromagnetic valve and the second electromagnetic valve are both connected with the programmable logic controller, and only one of the first electromagnetic valve and the second electromagnetic valve is opened at the same time; correspondingly, the flow sensor comprises: the first flow sensor is arranged on the first measuring pipeline and used for monitoring the gas desorption flow in the first measuring pipeline and sending the flow monitoring data to the programmable logic controller in real time; wherein the first flow sensor is capable of monitoring a gas desorption flow rate of 50ml/min or less.
Optionally, in any embodiment of the present application, in response to the first flow sensor monitoring that there is a gas desorption flow in the first measurement pipe, the programmable logic controller automatically records the sampling time, where the sampling time is a time from when a coal sample tank starts to take a coal sample to when the first flow sensor monitors that the gas desorption flow enters the first measurement pipe.
Optionally, in any embodiment of the present application, a third measurement pipeline is further disposed in the measurement device, the third measurement pipeline is disposed in parallel with the first measurement pipeline, and two ends of the third measurement pipeline are respectively communicated with an air inlet and an air outlet of the measurement device; a third electromagnetic valve is mounted on the third measuring pipeline and is connected with the programmable logic controller, and only one of the third electromagnetic valve, the first electromagnetic valve and the second electromagnetic valve is opened at the same time; correspondingly, the flow sensor further comprises: the second flow sensor is arranged on the third measuring pipeline and used for monitoring the gas desorption flow in the third measuring pipeline and sending the flow monitoring data to the programmable logic controller in real time; wherein the second flow sensor is capable of monitoring a gas desorption flow rate of greater than 50 milliliters per minute.
Optionally, in any embodiment of the present application, the programmable logic controller automatically controls switching between the first flow sensor and the second flow sensor according to the size of the gas desorption flow.
Optionally, in any embodiment of the present application, a four-way interface is further disposed in the measurement device, and correspondingly, the first measurement pipeline, the second measurement pipeline, and the third measurement pipeline are respectively communicated with the exhaust port of the measurement device through the four-way interface.
Optionally, in any embodiment of the present application, the preset diffusion time includes a plurality of consecutive test periods, and correspondingly, the programmable logic controller calculates a plurality of sets of the gas limit desorbable amounts according to gas desorption data in the plurality of consecutive test periods, and obtains the gas limit desorbable amount of the coal sample in response to that a difference between the gas limit desorbable amounts calculated in the plurality of consecutive test periods is smaller than a preset threshold, where in the plurality of consecutive test periods, a later test period includes all previous test periods.
Optionally, in any embodiment of the application, a display module is further disposed on the measuring device, and is in communication connection with the programmable logic controller, and is capable of displaying the measured gas limit desorbable amount of the coal sample, the sampling time, the coal sample weight, and the test time period in real time.
Optionally, in any embodiment of the present application, the coal sample tank includes: the coal sample tank comprises a tank body and a cover body, wherein the tank body is of a shell structure with an opening at one end, and the cover body is detachably connected with the opening end of the tank body and can seal the coal sample in the tank body; wherein, be equipped with on the lid with the blow vent of the inner space intercommunication of the jar body, the blow vent with the connection can be dismantled to the one end of desorption pipeline.
The embodiment of the application also provides a method for rapidly measuring and calculating the gas desorbing amount of the coal seam, which is used for measuring the gas desorbing amount of a target coal seam, responding to the self-checking passing of a measuring device, and connecting the gas inlet of the measuring device with a coal sample tank through a desorbing pipeline; starting the measuring device in response to the coal sample tank starting to be filled with the coal sample of the target coal seam; responding to a flow sensor in the measuring device to monitor the desorption flow of the gas diffused into the measuring device through the desorption pipeline, automatically recording sampling time by a programmable logic controller arranged in the measuring device, and calculating the gas limit desorbable quantity of the coal sample in preset diffusion time based on a gas dynamic diffusion simplified model written in advance according to flow monitoring data sent by the flow sensor, the sampling time and the weight of the coal sample in the coal sample tank; wherein, the simplified model of gas dynamic diffusion is:
wherein t is diffusion time in seconds; qtThe unit is the gas desorption flow at the time t and is cubic centimeter per gram; q∞Is the gas limit desorbable amount, which is expressed in cubic centimeters per gram; a is the maximum radius value of the coal sample, and the unit is centimeter; d0Characterizing the initial diffusion coefficient of gas in the coal sample when t is 0, with the unit being square centimeters per second; epsilon represents the attenuation coefficient of gas diffusion, and the unit is one-fourth per second.
Compared with the closest prior art, the technical scheme of the embodiment of the application has the following beneficial effects:
according to the technical scheme provided by the embodiment of the application, a coal sample tank is used for storing a coal sample of a target coal bed, the coal sample tank is connected with a measuring device through a desorption pipeline, the desorption flow of gas diffused into the measuring device through the desorption pipeline is monitored in real time through a flow sensor arranged in the measuring device, and flow monitoring data are sent to a programmable logic controller; the method comprises the steps that a programmable logic controller calculates gas desorption quantities within preset diffusion time and multiple continuous testing time periods for multiple times according to flow monitoring data, sampling time, diffusion time and the weight of a coal sample in a coal sample tank on the basis of a gas dynamic diffusion simplified model written in advance to obtain multiple groups of coal sample gas limit desorption quantities, and real coal sample gas limit desorption quantities are obtained through data correction, so that intelligent and rapid measurement and calculation of the coal bed gas desorption quantities are achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. Wherein:
fig. 1 is a schematic structural diagram of a system for rapidly calculating a desorption amount of coal bed gas according to some embodiments of the present application;
FIG. 2 is a schematic diagram of a first measurement conduit, a second measurement conduit, and a third measurement conduit coupled within an assay device provided in accordance with some embodiments of the application;
FIG. 3 is a schematic diagram of a system for rapidly calculating the amount of coal bed gas that can be desorbed according to some embodiments of the present application;
FIG. 4 is a schematic flow chart of a method for rapidly calculating the amount of coal bed gas that can be desorbed according to some embodiments of the application;
FIG. 5 is a comparison graph of fitting curves of a new model of gas dynamic diffusion and a simplified model of gas dynamic diffusion for the Yujia beam coal mine of Shendong coal group at an ambient temperature of 30 ℃ and a gas adsorption equilibrium pressure of 12MPa according to an embodiment of the application;
FIG. 6 is a comparison graph of fitting curves of a new model of gas dynamic diffusion and a simplified model of gas dynamic diffusion for the Yujia beam coal mine of Shendong coal group at an ambient temperature of 70 ℃ and a gas adsorption equilibrium pressure of 6MP, provided according to an embodiment of the application;
FIG. 7 is a comparison graph of fitting curves of a new gas dynamic diffusion model and a simplified gas dynamic diffusion model of gas coal of a Zhuxianzhuang coal mine of the Huaibei mining group at an ambient temperature of 50 ℃ and a gas adsorption equilibrium pressure of 20MPa according to an embodiment of the application;
FIG. 8 is a comparison graph of fitting curves of a new gas dynamic diffusion model and a simplified gas dynamic diffusion model of the gas coal of the Zhuxianzhuang coal mine of the Huaibei mining group provided by the embodiment of the application under the conditions that the environmental temperature is 90 ℃ and the gas adsorption equilibrium pressure is 12 MPa;
FIG. 9 is a comparison graph of a fitting curve of a new model of gas dynamic diffusion and a simplified model of gas dynamic diffusion for coking coal of a virgin coal mine of Taiyuan Huarun coal industry Co., Ltd at an ambient temperature of 50 ℃ and a gas adsorption equilibrium pressure of 2MPa according to an embodiment of the application;
FIG. 10 is a comparison graph of a fit curve of a new model of gas dynamic diffusion and a simplified model of gas dynamic diffusion for original coal mine of Taiyuan Huarun coal industries, Inc. provided according to an embodiment of the application at an ambient temperature of 70℃ and a gas adsorption equilibrium pressure of 6 MPa;
FIG. 11 is a comparison graph of fitting curves of anthracite coal from Qin and energy end-of-group coal mines at an ambient temperature of 30 ℃ and a gas adsorption equilibrium pressure of 2MPa using a new gas dynamic diffusion model and a simplified gas dynamic diffusion model according to an embodiment of the application;
FIG. 12 is a comparison graph of fitting curves of anthracite coal from Qin and energy end-of-group coal mines at an ambient temperature of 90 ℃ and a gas adsorption equilibrium pressure of 20MPa using a new gas dynamic diffusion model and a simplified gas dynamic diffusion model according to an embodiment of the application.
Description of reference numerals:
101-a coal sample tank; 102-a measurement device; 103-target coal seam; 104-desorption conduit;
112-a flow sensor; 112A-first flow sensor; 112B-a second flow sensor; 122-a programmable logic controller; 132-an air inlet; 142-an exhaust port; 152-charging/communication port; 162-a display module; 172A-a first measurement conduit; 172B-a third measurement conduit; 172C — a second measurement conduit; 182A-first solenoid valve; 182B-a third solenoid valve; 182C-second solenoid valve; 192-four-way interface.
Detailed Description
The present application will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the application and are not limiting of the application. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present application cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
In the description of the present application, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present application but do not require that the present application must be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. The terms "connected," "connected," and "disposed" as used herein are intended to be broadly construed, and may include, for example, fixed and removable connections; can be directly connected or indirectly connected through intermediate components; the connection may be a wired electrical connection, a wireless electrical connection, or a wireless communication signal connection, and a person skilled in the art can understand the specific meaning of the above terms according to specific situations.
As shown in fig. 1 to fig. 3, the system for rapidly measuring and calculating the gas desorbable amount of a coal seam is used for measuring the gas limit desorbable amount of a target coal seam, and includes: a coal sample tank 101 and a measuring device 102, wherein the coal sample tank 101 is connected with a gas inlet 132 of the measuring device 102 through a desorption pipeline 104, and the coal sample tank 101 is used for storing a coal sample of the target coal seam 103; the measurement device 102 includes: a programmable logic controller 122 and a flow sensor 112; the flow sensor 112 is in communication connection with the programmable logic controller 122, is arranged inside the measuring device 102, and is configured to monitor a desorption flow of the gas diffused into the measuring device 102 through the desorption pipeline 104, and send flow monitoring data to the programmable logic controller 122; a gas dynamic diffusion simplified model is written in the programmable logic controller 122 in advance, and the gas limit desorbable amount of the coal sample within preset diffusion time can be calculated according to the flow monitoring data, the sampling time and the weight of the coal sample in the coal sample tank 101; wherein, the sampling time is the time from the coal sample tank connection 101 to the coal sample collection to the monitoring of the gas desorption flow by the flow sensor 112, and the gas dynamic diffusion simplified model is as follows:
in which t is when diffusingTime, in seconds; qtThe desorption amount of the gas at the time t is in unit of cubic centimeter per gram; q∞Is the gas limit desorbable amount, which is expressed in cubic centimeters per gram; a is the maximum radius of the coal sample, and the unit is centimeter; d0Characterizing the initial diffusion coefficient of gas in the coal sample when t is 0, with the unit being square centimeters per second; epsilon represents the attenuation coefficient of gas diffusion and has the unit of one part per second. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment of the present application, before the coal sample is collected, the measurement device 102 is opened in advance, a self-test is performed on the measurement device 102, and after the instrument displays that the operation is normal, the system self-test is determined to pass, the desorption pipe 104 connects the air inlet 132 of the measurement device 102 and the air vent on the cover of the coal sample tank 101, and the air outlet 142 of the measurement device 102 is in an open state. After the coal seam has penetrated into the target coal seam 103, the discharged coal sample is taken in by the tank body of the coal sample tank 101, and at the same time, the measuring device 102 is started. After the coal sample tank 101 is filled with the coal sample, the cover of the coal sample tank 101 is quickly screwed down to be communicated with the measuring device 102, and gas desorbed from the coal sample in the coal sample tank 101 enters the measuring device 102 along the desorption pipeline 104. When the flow sensor 112 in the measuring device 102 monitors the gas desorption flow data, which indicates that the coal sample sampling link of the target coal seam 103 is finished, the programmable logic controller 122 automatically measures the sampling time, and then the process enters the coal sample gas desorption data acquisition link. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In this embodiment, after the measurement device 102 is turned on, the flow sensor 112 automatically monitors whether the desorption flow rate of the gas exists in the desorption pipeline 104, and automatically sends the monitored flow rate monitoring data of the gas desorption in the desorption pipeline 104 to the programmable logic controller 122, so as to automatically collect the gas desorption data of the coal sample; after receiving the flow monitoring data, the programmable logic controller 122 automatically calculates the gas limit desorbable amount of the coal sample by analyzing the gas desorption rule of the target coal seam 103 based on the pre-written gas dynamic diffusion simplified model, thereby realizing the intelligent and rapid measurement and calculation of the gas desorbable amount of the coal seam. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment of the application, before the coal sample is collected, a spring scale is used to obtain weight data of a plurality of groups (for example, 5 groups) of coal sample tanks filled with the target coal seam coal sample, and then an average coal sample weight is calculated according to the weight of the coal sample tank not connected with the coal sample and the weight data of the plurality of groups of coal samples, and the obtained average coal sample weight is regarded as the coal sample weight of the gas limit desorption amount of the coal sample. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment of the application, the coal sample is assumed to be an isotropic sphere, the pore structure of the coal matrix in the coal sample is formed by non-mean multi-level voids, the voids are gradually reduced and continuously distributed, the gas flow in the coal sample follows the mass conservation law and the continuity principle, the gas diffusion in the coal sample is carried out under the isothermal condition, and the instantaneous diffusion coefficient of the gas in the coal sample is related to time, temperature and pressure and is unrelated to coordinates. Based on a methane diffusion model (1), a new gas dynamic diffusion model (hereinafter referred to as a new model) is constructed by introducing the change rule of gas along with time, temperature and pressure when the gas is diffused in a coal sample and according to the relation between the instantaneous diffusion coefficient and the time by adopting a similar theory. Model (1) shows:
in the formula, C represents the mass concentration of gas in the coal sample and has the unit of g/cm3(ii) a t is the diffusion time of gas in the coal sample, and the unit is s; d (t) is the instantaneous diffusion coefficient of gas in the coal sample, and the unit is cm2/s；D0The initial diffusion coefficient of gas in the coal sample when t is 0 and the unit is cm2S; r is the radius of the coal sample, the unit is cm, and the maximum value is a; c0Is the initial mass concentration of the coal sample in g/cm when the gas is in adsorption equilibrium3；CaIs the gas concentration on the surface of the coal sample, and the unit is g/cm3；
The instantaneous diffusion coefficient D (t) of the gas in the coal sample and the time conform to an exponential function relation, and the instantaneous diffusion coefficient of the gas in the coal sample is shown in the following model (2):
D(t)＝D0*e-εt……………………………(2)
based on a separation variable method, according to the model (1) and the model (2), the gas limit desorbable quantity Q of the target coal seam 103 under the dynamic diffusion condition can be obtained∞Ultimate desorption amount of gas Q∞As shown in the following model (3):
then the new model of gas dynamic diffusion at the time t is as follows:
to further simplify the new model, let
u＝Cr………………………………(5)
In the model (5), u and C are functions of r and t;
based on Laplace transform and Newton's binomial theorem, a simplified model (hereinafter referred to as a simplified model) of gas dynamic diffusion is obtained according to a coal sample gas diffusion model (1), a model (2) of the instantaneous diffusion coefficient of gas in the coal sample and a model (5), and is shown as the following model (6):
in some alternative embodiments, a first measurement conduit 172A and a second measurement conduit 172C are provided within the assay device 102, one end of the first measurement conduit 172A and one end of the second measurement conduit 172C are both in communication with the gas inlet 132 of the assay device 102, and the other end of the first measurement conduit 172A and the other end of the second measurement conduit 172C are both in communication with the gas outlet 142 of the assay device 102; near the air inlet 132 of the measuring device 102, a first solenoid valve 182A is installed on the first measuring pipe 172A, a second solenoid valve 182C is installed on the second measuring pipe 172C, both the first solenoid valve 182A and the second solenoid valve 182C are connected to the programmable logic controller 122, and only one of the first solenoid valve 182A and the second solenoid valve 182C is opened at the same time, and correspondingly, the flow sensor 112 includes: the first flow sensor 112A is installed on the first measurement pipeline 172A, and is configured to monitor a gas desorption flow in the first measurement pipeline 172A and send the flow monitoring data to the programmable logic controller 122 in real time; wherein the first flow sensor 112A is capable of monitoring a gas desorption flow rate of 50ml/min or less. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment of the present application, the programmable logic controller 122 controls the on/off of the first electromagnetic valve 182A and the second electromagnetic valve 182C, so that the desorbed gas flow in the coal sample tank 101 can only flow from the first measurement pipeline 172A or the second measurement pipeline 172C at the same time after passing through the desorption pipeline 104. During the sampling and monitoring process of the first flow sensor 112A on the gas desorption flow, the first electromagnetic valve 182A is opened, and the second electromagnetic valve 182C is closed; when the first flow sensor 112A detects that the gas desorption is finished, the first electromagnetic valve 182A is closed, and the second electromagnetic valve 182C is opened, so that the gas desorption flow in the coal sample tank 101 is directly discharged from the gas outlet 142 of the measuring device 102 through the second measuring pipe 172C. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In a specific example, in response to the first flow sensor 112A detecting that the gas desorption flow rate exists in the first measurement pipe 172A, the programmable logic controller 122 automatically records the sampling time, wherein the sampling time is the time from the beginning of the coal sample tank receiving the coal sample to the time when the first flow sensor 112A detects that the gas desorption flow rate enters the first measurement pipe 172A. Therefore, when the measuring device 102 starts to measure the gas limit desorbable amount, the automatic monitoring of the gas desorption flow in the first measuring pipeline 172A is realized, the sampling time when the gas desorption flow enters the first measuring pipeline 172A is automatically recorded, and the accuracy of measuring the gas limit desorbable amount is improved. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In another specific example, a third measurement duct 172B is further provided in the measurement device 102, the third measurement duct 172B is arranged in parallel with the first measurement duct 172A, and both ends of the third measurement duct 172B are respectively communicated with the air inlet 132 and the air outlet 142 of the measurement device 102; a third electromagnetic valve 182B is installed on the third measurement pipeline 172B near the air inlet 132 of the measurement device, the third electromagnetic valve 182B is connected with the programmable logic controller 122, and only one of the third electromagnetic valve 182B, the first electromagnetic valve 182A and the second electromagnetic valve 182C is opened at the same time; correspondingly, the flow sensor 112 further includes: the second flow sensor 112B is installed on the third measurement pipeline 172B, and is configured to monitor a gas desorption flow in the third measurement pipeline 172B and send the flow monitoring data to the programmable logic controller 122 in real time; wherein the second flow sensor 112B is capable of monitoring a gas desorption flow rate of greater than 50 milliliters per minute. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment of the present application, the third measurement pipeline 172B is disposed in parallel with the first measurement pipeline 172A and the second measurement pipeline 172C, and both of them are communicated with the air inlet 132 of the measuring device 102, and only one of the first electromagnetic valve 182A, the second electromagnetic valve 182C, and the third electromagnetic valve 182B is opened at the same time, so that the gas desorption flow rate in the coal sample tank 101 can only flow through one pipeline at the same time. When the measuring device 102 is opened, the programmable logic controller 122 first automatically selects the first flow sensor 112A and the second flow sensor 112B according to the magnitude of the gas desorption flow, when the flow rate is greater than 50ml per minute, the programmable logic controller 122 controls the third electromagnetic valve 182A to be opened, the first electromagnetic valve 182A and the second electromagnetic valve 182C to be closed, the second flow sensor 112B monitors the gas desorption flow rate greater than 50ml per minute in the desorption pipeline 104, and the flow monitoring data is sent to the programmable logic controller 122. When the gas desorption flow rate is less than or equal to 50 milliliters per minute, the programmable logic controller 122 controls the first electromagnetic valve 182A to be opened, the second electromagnetic valve 182C and the third electromagnetic valve 182B to be closed, the first flow sensor 112A monitors the gas desorption flow rate within 50 milliliters per minute in real time, and the flow monitoring data is sent to the programmable logic controller 122. Therefore, the accuracy of monitoring data of the gas desorption flow is improved, and the accuracy of measuring the gas limit desorption amount is further improved. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment of the present application, during the gas desorption test, the programmable logic controller 122 implements automatic control switching of the first flow sensor 112A and the second flow sensor 112B according to the magnitude of the gas desorption flow. The range of the first flow sensor 112A is 0-50ml/min and the range of the second flow sensor 112B is 0-3000 ml/min. The first solenoid valve 182A and the third solenoid valve 182B can be opened and closed automatically according to the instruction of the programmable logic controller 122. Therefore, according to the size of the gas desorption flow, the automatic switching of the first flow sensor 112A and the second flow sensor 112B is realized, and the monitoring precision of the gas desorption flow is improved. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment of the present application, the flow sensor 112 performs data acquisition on the gas desorption flow, and after the data acquisition is completed, the measuring device 102 performs a link of measuring and calculating the gas limit desorbable amount, the programmable logic controller 122 controls the first electromagnetic valve 182A and the third electromagnetic valve 182B to close, and simultaneously automatically opens the second electromagnetic valve 182C, so that the gas continuously desorbed from the coal sample enters the second measuring pipe 172C and is discharged from the gas outlet 142. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In another specific example, a four-way interface 192 is further provided in the measurement device 102, and the first measurement duct 172A, the second measurement duct 172C, and the third measurement duct 172B are respectively communicated with the exhaust port 142 of the measurement device 102 through the four-way interface 192. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment of the present application, after the gas entering from the gas inlet 132 flows through the first measurement pipeline 172A, the second measurement pipeline 172C, or the third measurement pipeline 172B, the gas is discharged from the gas outlet 142, the first measurement pipeline 172A, the second measurement pipeline 172C, and the third measurement pipeline 172B are respectively communicated with three of the four-way interfaces 192, and the other interface of the four-way interface 192 is communicated with the gas outlet 142, so that the discharge of the desorption flow rate of the gas is realized, and meanwhile, the pipelines in the measurement device 102 are arranged, so that the layout of the pipelines in the measurement device 102 is more reasonable and ordered, and the installation and maintenance of each component in the measurement device 102 are facilitated. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some optional embodiments, the preset diffusion time includes a plurality of consecutive test periods, and correspondingly, the programmable logic controller 122 calculates a plurality of sets of gas limit desorbable amounts according to gas desorption data in the plurality of consecutive test periods, and obtains the gas limit desorbable amount of the coal sample in response to that a difference between the gas limit desorbable amounts calculated in the plurality of consecutive test periods is smaller than a preset threshold, where in the plurality of consecutive test periods, the latter test period includes all previous test periods. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In this embodiment, the flow sensor 112 monitors the gas desorption flow in real time, and sends the flow monitoring data to the programmable logic controller 122, and when the first test period of the preset diffusion time is reached, the programmable logic controller 122 calculates the gas limit desorbable amount in the first test period based on the gas dynamic diffusion simplified model according to the gas flow monitoring data in the first test period, the test time, the sampling time and the weight of the coal sample in the first test period. In the process, the flow sensor 112 continuously monitors the gas desorption flow in real time, and sends the flow monitoring data to the programmable logic controller 122, and when the second test period is reached, the programmable logic controller 122 calculates the gas limit desorbable amount in the second test period based on the gas dynamic diffusion simplified model according to the gas flow monitoring data in the second test period, the test time, the sampling time and the weight of the coal sample in the second test period. It should be noted that the second test period includes the first test period, and the flow monitoring data adopted by the programmable logic controller 122 when performing the calculation of the gas limit desorbable amount in the second test period includes the flow monitoring data in the first test period and the flow monitoring data from the end of the first test period to the second test period. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment of the application, when the programmed logic controller calculates the error between the measured data of the gas limit desorbable amount of several continuous test periods for multiple times to be smaller than the preset error, the measurement of the gas limit desorbable amount of the coal sample is finished. For example, when the difference between the gas limit desorbable amounts of two adjacent consecutive periods of time is less than 0.05 cubic centimeters per gram or when a curve of a plurality of groups of gas limit desorbable amounts is approximated to a straight line, the gas limit desorbable amount calculated by the measuring device 102 is considered as a test result, which indicates that the measurement of the coal sample gas limit desorbable amount is finished. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some optional embodiments, a display module 162 is further disposed on the measuring device 102, and is in communication with the programmable logic controller 122, and is capable of displaying the measured gas limit desorbable amount of the coal sample, the sampling time, the weight of the coal sample, and the test time period in real time. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In this embodiment, the display module 162 is in communication connection with the programmable logic controller 122, and the programmable logic controller 122 may display the received flow monitoring data sent by the flow sensor 112, the sampling time recorded by the programmable logic controller 122, the gas limit desorbable amount calculated by the programmable logic controller 122, and the curve of the gas limit desorbable amount on the display module 162 in real time, so that an engineer can more intuitively observe the gas desorption in the coal sample tank 101. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In some alternative embodiments, the coal sample tank 101 includes: the coal sample tank comprises a tank body and a cover body, wherein the tank body is of a shell structure with an opening at one end, and the cover body is detachably connected with the opening end of the tank body and can seal the coal sample in the tank body; wherein, be equipped with on the lid with the vent of the inner space intercommunication of the jar body, the vent with the connection can be dismantled to the one end of desorption pipeline 104. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment of the application, the detachable connection of the tank body and the cover body facilitates the communication between the desorption pipeline 104 and the vent on the cover body, and meanwhile, the tank body is convenient to access the coal sample of the target coal seam 103. The cover body seals the tank body, so that the gas desorption flow of the coal sample in the tank body enters the measuring device 102 along the desorption pipeline 104 without leakage, and the measuring accuracy of the gas desorption flow of the coal sample is effectively improved. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment of the present application, a charging/communication port 152 is further disposed outside the measurement apparatus 102, and is connected to the programmable logic controller 122 for supplying power or data transmission (e.g., communication with the display module 162, etc.) to the measurement apparatus 102; the programmable logic controller 122 is further provided with a program output end for writing the gas dynamic diffusion simplified model into the programmable logic controller 122. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
In the embodiment of the application, the gas dynamic diffusion simplified model is written in the programmable logic controller 122, the gas desorption flow is monitored in real time by using the flow sensor 112, the gas desorption process is divided into a plurality of test time periods by the programmable logic controller 122, data correction is performed on the obtained data of the plurality of groups of gas limit desorbable quantities, more accurate gas limit desorbable quantities are obtained, intelligent rapid determination of the gas limit desorbable quantities is finally realized, and the field application is convenient and rapid. It should be noted that, when data correction is performed on multiple sets of gas limit analyzable quantity data, it is only required to ensure that the difference between multiple sets of gas limit desorbable quantity data is smaller than a preset threshold. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
Fig. 4 is a schematic flow chart of a method for rapidly calculating the amount of coal bed gas that can be desorbed according to some embodiments of the present application; as shown in fig. 4. The method for rapidly measuring and calculating the desorbable amount of the coal bed gas is used for measuring the outer limit desorbable amount of a target coal bed, and comprises the following steps:
step S101, responding to the self-checking passing of a measuring device, and connecting an air inlet of the measuring device with a coal sample tank through a desorption pipeline;
step S102, responding to the fact that the coal sample tank begins to be filled with the coal sample of the target coal seam, and starting the measuring device;
step S103, responding to the fact that a flow sensor in the measuring device monitors the desorption flow of gas diffused into the measuring device through the desorption pipeline, automatically recording sampling time by a programmable logic controller arranged in the measuring device, and calculating the gas limit desorbable quantity of the coal sample within preset diffusion time based on a gas dynamic diffusion simplified model written in advance according to flow monitoring data sent by the flow sensor, the sampling time and the weight of the coal sample in the coal sample tank; wherein, the simplified model of gas dynamic diffusion is:
wherein t is diffusion time in seconds; qtThe desorption amount of the gas at the time t is in unit of cubic centimeter per gram; q∞Is the gas limit desorbable amount, which is expressed in cubic centimeters per gram; a is the maximum radius value of the coal sample, and the unit is centimeter; d0Characterizing the initial diffusion coefficient of gas in the coal sample when t is 0, with the unit being square centimeters per second; epsilon represents the attenuation coefficient of gas diffusion, and the unit is one-fourth per second.
The method for rapidly measuring and calculating the amount of coal bed gas that can be desorbed can achieve the beneficial effects of any one of the above system embodiments for rapidly measuring and calculating the amount of coal bed gas that can be desorbed, and is not repeated here.
5-12 are comparison and investigation of the coal bed gas desorbable amount rapid test method provided by some embodiments of the present application, which considers the prediction accuracy of the gas desorption curve of the coal sample under different experimental conditions (different gas adsorption equilibrium pressures, different environmental temperatures) of the new gas dynamic diffusion model and the simplified gas dynamic diffusion model, and compares the prediction accuracy with the fitting curve charts of the measured value, the new model and the simplified model; wherein, the calculation result obtained according to the model (4) is simply called the calculation result of the new model, and the calculation result obtained according to the model (6) is simply called the calculation result of the simplified model. Fig. 5 and 6 are comparison graphs of fitting curves of a new model of gas dynamic diffusion and a simplified model of gas dynamic diffusion adopted by the longwall coal mine of the elm family beam of the Shendong coal group under different experimental conditions according to an embodiment of the application; fig. 7 and 8 are comparison graphs of fitting curves of a new gas dynamic diffusion model and a simplified gas dynamic diffusion model of gas coal of a Zhuxianzhuang coal mine of the Huaibei mining group under different experimental conditions, which are provided according to an embodiment of the application; fig. 9 and 10 are fitting curve comparison diagrams of a new gas dynamic diffusion model and a simplified gas dynamic diffusion model of coking coal of original-phase coal mine of taiyuan huarun coal industry ltd under different experimental conditions, which are provided according to an embodiment of the application; fig. 11 and 12 are comparison graphs of fitting curves of anthracite coal of Qin and energy group terminal coal mines provided by the embodiment of the application under different experimental conditions by adopting a new gas dynamic diffusion model and a simplified gas dynamic diffusion model. As can be seen from fig. 5 to 12, under the experimental conditions of different gas adsorption equilibrium pressures and different environmental temperatures of four coal samples with different metamorphism degrees, the fitting curve of the gas dynamic diffusion simplified model almost coincides with the fitting curve of the new gas dynamic diffusion model, and is also matched with the experimental test point, and the fitting degree reaches more than 95%, so that the gas dynamic diffusion model is proved to be capable of more accurately describing the gas desorption process of the coal sample, and the gas dynamic diffusion simplified model is simpler and more suitable for field application, can meet the field production requirements, and is proved to have good stability and accuracy. It should be understood that the above description is only exemplary, and the embodiments of the present application do not limit the present invention.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A coal seam gas desorbable amount rapid measuring and calculating system is used for measuring a gas limit desorbable amount of a target coal seam, and is characterized by comprising: the coal sample tank is connected with the air inlet of the measuring device through a desorption pipeline and is used for storing the coal sample of the target coal bed;
the assay device comprises: a programmable logic controller and a flow sensor;
the flow sensor is in communication connection with the programmable logic controller, is arranged in the measuring device and is used for monitoring the desorption flow of the gas diffused into the measuring device through the desorption pipeline and sending flow monitoring data to the programmable logic controller;
a gas dynamic diffusion simplified model is written in the programmable logic controller in advance, and the gas limit desorbable quantity of the coal sample within preset diffusion time can be calculated according to the flow monitoring data, the sampling time and the weight of the coal sample in the coal sample tank; the sampling time is the time from the beginning of receiving the coal sample from the coal sample tank to the monitoring of the gas desorption flow by the flow sensor, and the gas dynamic diffusion simplified model is as follows:
wherein t is diffusion time in seconds; qtThe desorption amount of the gas at the time t is in unit of cubic centimeter per gram; q∞Is the gas limit desorbable amount, which is expressed in cubic centimeters per gram; a is the maximum radius of the coal sample, and the unit is centimeter; d0Characterizing the initial diffusion coefficient of gas in the coal sample when t is 0, with the unit being square centimeters per second; epsilon represents the attenuation coefficient of gas diffusion, and the unit is one-fourth per second.
2. The system for rapidly measuring and calculating the amount of coal bed gas that can be desorbed according to claim 1, wherein a first measuring pipe and a second measuring pipe are provided in the measuring device, one end of the first measuring pipe and one end of the second measuring pipe are both communicated with an air inlet of the measuring device, and the other end of the first measuring pipe and the other end of the second measuring pipe are both communicated with an air outlet of the measuring device; a first electromagnetic valve is arranged on the first measuring pipeline and a second electromagnetic valve is arranged on the second measuring pipeline close to the air inlet of the measuring device, the first electromagnetic valve and the second electromagnetic valve are both connected with the programmable logic controller, and only one of the first electromagnetic valve and the second electromagnetic valve is opened at the same time;
in a corresponding manner, the first and second optical fibers are,
the flow sensor includes: the first flow sensor is arranged on the first measuring pipeline and used for monitoring the gas desorption flow in the first measuring pipeline and sending the flow monitoring data to the programmable logic controller in real time;
wherein the first flow sensor is capable of monitoring a gas desorption flow rate of 50ml/min or less.
3. The system for rapidly measuring and calculating the amount of coal bed gas that can be desorbed according to claim 2, wherein in response to the first flow sensor monitoring that the first measurement pipeline has a gas desorption flow rate, the programmable logic controller automatically records the sampling time, wherein the sampling time is the time from the beginning of the coal sample tank receiving the coal sample to the time when the first flow sensor monitors that the gas desorption flow rate enters the first measurement pipeline.
4. The system for rapidly calculating the amount of coal bed gas that can be desorbed according to claim 2, wherein a third measurement pipeline is further disposed in the measurement device, the third measurement pipeline is disposed in parallel with the first measurement pipeline, and both ends of the third measurement pipeline are respectively communicated with the gas inlet and the gas outlet of the measurement device; a third electromagnetic valve is mounted on the third measuring pipeline and is connected with the programmable logic controller, and only one of the third electromagnetic valve, the first electromagnetic valve and the second electromagnetic valve is opened at the same time;
correspondingly, the flow sensor further comprises: the second flow sensor is arranged on the third measuring pipeline and used for monitoring the gas desorption flow in the third measuring pipeline and sending the flow monitoring data to the programmable logic controller in real time;
wherein the second flow sensor is capable of monitoring a gas desorption flow rate of greater than 50 milliliters per minute.
5. The system for rapidly measuring and calculating the amount of coal-bed gas that can be desorbed according to claim 4, wherein the programmable logic controller automatically controls the switching between the first flow sensor and the second flow sensor according to the amount of gas desorption flow.
6. The system for rapidly calculating the amount of coal bed gas that can be desorbed according to claim 4, wherein a four-way interface is further provided in the measuring device, and correspondingly, the first measuring pipeline, the second measuring pipeline, and the third measuring pipeline are respectively communicated with the exhaust port of the measuring device through the four-way interface.
7. The system for rapidly measuring and calculating the amount of coal bed gas that can be desorbed according to claim 1, wherein the predetermined diffusion time includes a plurality of consecutive test periods, and correspondingly, the programmable logic controller calculates a plurality of sets of the gas limit desorbable amounts according to the gas desorption data in the plurality of consecutive test periods, and obtains the gas limit desorbable amount of the coal sample in response to that the difference between the gas limit desorbable amounts calculated in the plurality of consecutive test periods is smaller than a predetermined threshold, wherein the latter test period in the plurality of consecutive test periods includes all previous test periods.
8. The system for rapidly measuring and calculating the amount of desorbed gas from the coal seam according to claim 7, wherein the measuring device is further provided with a display module which is in communication connection with the programmable logic controller and can display the measured amount of desorbed gas in the limit of the coal sample, the sampling time, the weight of the coal sample and the test time period in real time.
9. The system for rapidly calculating the amount of coal bed gas that can be desorbed according to any one of claims 1 to 8, wherein the coal sample tank comprises: the coal sample tank comprises a tank body and a cover body, wherein the tank body is of a shell structure with an opening at one end, and the cover body is detachably connected with the opening end of the tank body and can seal the coal sample in the tank body; wherein, be equipped with on the lid with the blow vent of the inner space intercommunication of the jar body, the blow vent with the connection can be dismantled to the one end of desorption pipeline.
10. A method for rapidly measuring and calculating the gas desorption amount of a coal seam is used for measuring the gas limit desorption amount of a target coal seam and is characterized in that,
connecting a gas inlet of the measuring device with a coal sample tank through a desorption pipeline in response to the self-detection passing of the measuring device;
starting the measuring device in response to the coal sample tank starting to be filled with the coal sample of the target coal seam;
responding to a flow sensor in the measuring device to monitor the desorption flow of the gas diffused into the measuring device through the desorption pipeline, automatically recording sampling time by a programmable logic controller arranged in the measuring device, and calculating the gas limit desorbable quantity of the coal sample in preset diffusion time based on a gas dynamic diffusion simplified model written in advance according to flow monitoring data sent by the flow sensor, the sampling time and the weight of the coal sample in the coal sample tank;
wherein, the simplified model of gas dynamic diffusion is:
wherein t is diffusion time in seconds; qtThe unit is the gas desorption flow at the time t and is cubic centimeter per gram; q∞Is the gas limit desorbable amount, which is expressed in cubic centimeters per gram; a is the maximum radius value of the coal sample, and the unit is centimeter; d0Characterizing the initial diffusion coefficient of gas in the coal sample when t is 0, with the unit being square centimeters per second; epsilon represents the attenuation coefficient of gas diffusion, and the unit is one-fourth per second.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060001A (en) * | 2021-12-07 | 2022-02-18 | 中煤能源研究院有限责任公司 | Automatic measuring device and method for gas flow attenuation coefficient of drill hole |
| CN114544424A (en) * | 2022-03-14 | 2022-05-27 | 中煤科工集团沈阳研究院有限公司 | Method and device for quickly and automatically measuring gas content of underground coal seam |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033442A (en) * | 2012-12-20 | 2013-04-10 | 河南理工大学 | Gas adsorption and desorption test apparatus |
| CN108444864A (en) * | 2018-03-23 | 2018-08-24 | 河南理工大学 | A kind of transient state coal gas adsorption isotherm testing experiment method |
| CN108732329A (en) * | 2018-05-14 | 2018-11-02 | 华北科技学院 | A kind of determination of coal seam gas pressure analog simulation experimental device and method |
| US20200200004A1 (en) * | 2017-10-12 | 2020-06-25 | China University Of Mining And Technology | Measurement-while-drilling method and device for assessing outburst risk of coal seam |
| CN111337388A (en) * | 2018-12-19 | 2020-06-26 | 河南理工大学 | Method for rapidly determining coal seam gas content based on diffusivity curve differential subtraction method |
-
2021
- 2021-01-19 CN CN202110071522.0A patent/CN112903519B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033442A (en) * | 2012-12-20 | 2013-04-10 | 河南理工大学 | Gas adsorption and desorption test apparatus |
| US20200200004A1 (en) * | 2017-10-12 | 2020-06-25 | China University Of Mining And Technology | Measurement-while-drilling method and device for assessing outburst risk of coal seam |
| CN108444864A (en) * | 2018-03-23 | 2018-08-24 | 河南理工大学 | A kind of transient state coal gas adsorption isotherm testing experiment method |
| CN108732329A (en) * | 2018-05-14 | 2018-11-02 | 华北科技学院 | A kind of determination of coal seam gas pressure analog simulation experimental device and method |
| CN111337388A (en) * | 2018-12-19 | 2020-06-26 | 河南理工大学 | Method for rapidly determining coal seam gas content based on diffusivity curve differential subtraction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060001A (en) * | 2021-12-07 | 2022-02-18 | 中煤能源研究院有限责任公司 | Automatic measuring device and method for gas flow attenuation coefficient of drill hole |
| CN114544424A (en) * | 2022-03-14 | 2022-05-27 | 中煤科工集团沈阳研究院有限公司 | Method and device for quickly and automatically measuring gas content of underground coal seam |
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