阅读说明：本技术 一种降阻剂携渣能力检测方法及装置 (Resistance reducing agent slag carrying capacity detection method and device ) 是由 熊伟 刘延保 巴全斌 周厚权 申凯 杨利平 廖引 秦晓强 马钱钱 史永涛 何俊 于 2020-12-30 设计创作，主要内容包括：本发明属于煤矿降阻剂性能测试技术领域。涉及一种降阻剂携渣能力检测方法及装置,降阻剂携渣能力检测方法包括如下步骤：配置测试液—配置矿渣—渣液混合—工况模拟—收集—测量评价；检测装置包括用于制备测试液的配液装置、渣液混合装置、工况模拟装置,所述渣液混合装置一端与配液装置连接,另一端与工况模拟装置连接；所述配液装置与渣液混合装置之间设有流量泵；所述渣液混合装置上设有与其相通的进渣漏斗；所述工况模拟装置下设有收集装置。本发明中通过设置工况模拟装置,对实际工况进行模拟,使得测量结果能够直接反映出实际工况下的降阻剂的携渣能力,对降阻剂的选择应用起到直接指导作用。(The invention belongs to the technical field of performance testing of a coal mine resistance reducing agent. Relates to a method and a device for detecting slag carrying capacity of a resistance reducing agent, wherein the method for detecting the slag carrying capacity of the resistance reducing agent comprises the following steps: preparing a test solution, preparing slag, mixing slag and liquid, simulating working conditions, collecting, measuring and evaluating; the detection device comprises a liquid preparation device for preparing the test liquid, a slag-liquid mixing device and a working condition simulation device, wherein one end of the slag-liquid mixing device is connected with the liquid preparation device, and the other end of the slag-liquid mixing device is connected with the working condition simulation device; a flow pump is arranged between the liquid preparation device and the slag-liquid mixing device; the slag-liquid mixing device is provided with a slag inlet funnel communicated with the slag-liquid mixing device; and a collecting device is arranged below the working condition simulation device. According to the invention, the working condition simulation device is arranged to simulate the actual working condition, so that the measurement result can directly reflect the slag carrying capacity of the resistance reducing agent under the actual working condition, and the resistance reducing agent can be directly guided to select and apply.)

1. A method for detecting slag carrying capacity of a resistance reducing agent is characterized by comprising the following steps:

A. preparing a test solution: blending the resistance reducing agent to be tested according to a set proportion, uniformly mixing, and preparing into a test solution;

B. preparing slag: weighing the slag;

C. mixing the slag and the liquid: mixing the test solution prepared in the step A with the slag in the step B according to a set flow rate, and uniformly mixing the test solution with the slag to prepare a mixed solution;

D. and (3) working condition simulation: c, introducing the mixed liquid prepared in the step C into a working condition simulation device to simulate the influence of the movement condition of a drill rod and the size of a drilled hole on the mixed liquid under the actual working condition; finally, discharging the mixed liquid from the working condition simulation device;

E. collecting: collecting and filtering the discharged slag, taking out the slag and drying the slag;

F. measurement and evaluation: and E, weighing the slag in the step E to obtain the weight of the discharged slag, and dividing the weight of the discharged slag by the total weight of the slag in the step B to obtain the slag carrying capacity of the resistance reducing agent.

2. The method for detecting the slag carrying capacity of the friction reducer according to claim 1, wherein the method comprises the following steps: in the step D, the working condition simulation device comprises a drill rod and transparent pipelines, the transparent pipelines with various specifications are adopted to simulate different drill hole sizes, and the drill rod is placed in the transparent pipelines; when the mixed liquid enters from the transparent pipeline, the drill rod is started to drive the mixed liquid to rotate, and the drill rod moves up and down in the transparent pipeline to simulate the movement condition of the drill rod in the drill hole.

3. The method for detecting the slag carrying capacity of the friction reducer according to claim 2, wherein the method comprises the following steps: and step F, when the slag in the transparent pipeline is not changed any more, measuring the stacking angle and the stacking height formed by the slag remained in the transparent pipeline, and judging the stacking condition of the slag in the pipeline under the working condition.

4. The method for detecting the slag carrying capacity of the friction reducer according to claim 1, wherein the method comprises the following steps: and in the step B, the slag is of a single size or is mixed with different particle sizes according to a set proportion.

5. A detection apparatus applied to the detection method according to claim 1, characterized in that: the device comprises a liquid preparation device for preparing a test liquid, a slag-liquid mixing device and a working condition simulation device, wherein one end of the slag-liquid mixing device is connected with the liquid preparation device, and the other end of the slag-liquid mixing device is connected with the working condition simulation device; a flow pump is arranged between the liquid preparation device and the slag-liquid mixing device; the slag-liquid mixing device is provided with a slag inlet funnel communicated with the slag-liquid mixing device; and a collecting device is arranged below the working condition simulation device.

6. The detection device according to claim 5, wherein: the liquid preparation device comprises a water tank and a stirrer, wherein the stirrer is arranged on the water tank, and the water tank is connected with the flow pump.

7. The detection device according to claim 5, wherein: the slag-liquid mixing device comprises a mixing pipe and a turbine mixer; the turbine mixer is arranged in the mixing pipe; one end of the mixing pipe is connected with the flow pump, and the other end of the mixing pipe is connected with the working condition simulation device.

8. The detection device according to claim 7, wherein: the slag inlet funnel is arranged on the mixing pipe; the slag inlet funnel is provided with a slag inlet which is communicated with the mixing pipe; and an adjusting plate for controlling the size of the slag inlet is arranged on the slag inlet funnel.

9. The detection device according to claim 5, wherein: the working condition simulation device comprises a transparent pipeline and a drill rod, wherein one end of the transparent pipeline is connected with the mixing device, and the other end of the transparent pipeline is provided with an opening; one end of the drill rod penetrates through the opening and is arranged in the transparent pipeline, and the other end of the drill rod is connected with the speed regulating motor; the speed regulating motor is arranged on the lifting platform.

10. The detection device according to claim 9, wherein: the collecting device comprises a collecting cylinder and a filter screen, the filter screen is arranged in the collecting cylinder, and the collecting cylinder is positioned below the opening of the transparent pipeline.

Technical Field

The invention belongs to the technical field of performance testing of coal mine resistance reducing agents, and relates to a method and a device for detecting slag carrying capacity of a resistance reducing agent.

Background

The gas is associated gas in the coal generation process, the flammable and explosive characteristics of the gas bring great potential safety hazards to coal mining, and the gas disaster prevention and control are important in coal mine safety production. In recent years, various hydraulic coal seam permeability increasing measures such as hydraulic cutting, hydraulic punching hole making, hydraulic fracturing and the like are formed in China, and certain promotion effects are achieved on improving the permeability of coal seams and improving the gas extraction effect.

The measure of coal seam hydraulic permeability increase is that high-pressure water is conveyed to an action point through a pipeline with a smaller diameter, the structure of a coal body is modified through pressure release, the generation and development of coal-rock body cracks are promoted, and a gas flow channel is increased. More slag generated after the hydraulic permeability-increasing measures are implemented needs to be discharged out of the drilled hole in time so as to avoid blocking a new channel and reduce the implementation effect of the permeability-increasing measures. The hydraulic permeability-increasing measures are usually to add a resistance-reducing agent into the clear water to properly increase the viscosity of the water, so that the resistance loss in the flowing process of the pipeline is reduced, and the slag carrying capacity in the liquid backflow process is improved. The resistance reducing agent for the coal mine underground hydraulic permeability increasing measure has two contradictory functions of balancing resistance reduction and slag carrying, and puts higher requirements on the performance of a liquid medium formed by mixing the resistance reducing agent and clear water. The resistance reducing performance of the resistance reducing agent forms related industrial standards, and has a standard and universal testing and evaluating method, but at present, no detection method and device aiming at the slag carrying capacity of the resistance reducing agent exist, so that the application selection of the resistance reducing agent is blind, and the expected effect is not achieved.

Disclosure of Invention

In view of this, the present invention aims to detect and evaluate the slag carrying capacity of a resistance reducing agent, provide guidance for the application of the resistance reducing agent, and provide a method and an apparatus for detecting the slag carrying capacity of the resistance reducing agent.

In order to achieve the purpose, the invention provides the following technical scheme:

a method for detecting slag carrying capacity of a resistance reducing agent comprises the following steps:

A. preparing a test solution: blending the resistance reducing agent to be tested according to a set proportion, uniformly mixing, and preparing into a test solution;

B. preparing slag: weighing the slag;

C. mixing the slag and the liquid: mixing the test solution prepared in the step A with the slag in the step B according to a set flow rate, and uniformly mixing the test solution with the slag to prepare a mixed solution;

D. and (3) working condition simulation: c, introducing the mixed liquid prepared in the step C into a working condition simulation device to simulate the influence of the movement condition of a drill rod and the size of a drilled hole on the mixed liquid under the actual working condition; finally, discharging the mixed liquid from the working condition simulation device;

E. collecting: collecting and filtering the discharged slag, taking out the slag and drying the slag;

F. measurement and evaluation: and E, weighing the slag in the step E to obtain the weight of the discharged slag, and dividing the weight of the discharged slag by the total weight of the slag in the step B to obtain the slag carrying capacity of the resistance reducing agent.

The principle of the method is as follows: and respectively quantifying the test liquid and the slag in proportion, and then uniformly mixing the test liquid and the slag to ensure that the test liquid and the slag enter a working condition simulation device to simulate the flowing condition under the actual working condition so as to evaluate the slag carrying capacity of the resistance reducing agent according to the mass ratio of the discharged slag.

The beneficial effect of this basic scheme lies in: respectively quantifying the test liquid and the slag in proportion, uniformly mixing, and enabling the test liquid and the slag to enter a working condition simulation device to simulate the flowing condition under the actual working condition so as to evaluate the slag carrying capacity of the resistance reducing agent according to the mass ratio of the discharged slag; through the working condition simulation device, the measurement result of the slag carrying capacity can be directly guided to practical application, and the weighing method is adopted, so that the operation is simple and the implementation is convenient.

Further, in the step D, the working condition simulation device comprises a drill rod and transparent pipelines, the transparent pipelines with various specifications are adopted to simulate different drill hole sizes, and the drill rod is placed in the transparent pipelines; when mixed liquid enters from transparent pipe, start the drilling rod, make the drilling rod drive mixed liquid and rotate to make the drilling rod up-and-down motion in transparent pipe, with the motion condition of simulation drilling rod in drilling, beneficial effect: through setting up transparent pipeline, drilling rod to the motion condition and the drilling size of drilling rod under the operating condition simulate, let the test result can embody the effect under the operating condition.

Further, in step F, when the slag no longer changes in the transparent pipeline, the measurement remains in the angle of stack and the height of stacking that the slag formed in the transparent pipeline, judges the condition of piling up of slag under this operating mode in the pipeline, beneficial effect: the accumulation condition of the slag in the pipeline under the working condition is judged by measuring the accumulation angle and the accumulation height formed by the slag remained in the transparent pipeline, so as to evaluate the integral slag discharge effect brought by the resistance reducing agent.

Further, the slag in the step B is mixed with a single size or different particle sizes according to a set proportion, and the beneficial effects are that: and simulating the mixing condition of the slag under the actual working condition.

The detection device applied to the detection method of claim 1 comprises a liquid preparation device for preparing the test liquid, a slag-liquid mixing device and a working condition simulation device, wherein one end of the slag-liquid mixing device is connected with the liquid preparation device, and the other end of the slag-liquid mixing device is connected with the working condition simulation device; a flow pump is arranged between the liquid preparation device and the slag-liquid mixing device; the slag-liquid mixing device is provided with a slag inlet funnel communicated with the slag-liquid mixing device; a collecting device is arranged below the working condition simulation device; has the advantages that: the device is suitable for the detection method of the slag carrying capacity of the resistance reducing agent, the flow of the test liquid is regulated through the flow pump so as to simulate the flow working conditions of different hydraulic measures, the actual working conditions are simulated through the working condition simulation device, and the guiding significance is provided for the actual application of the resistance reducing agent.

Further, join in marriage liquid device and include water tank, agitator, the agitator is located on the water tank, the water tank is connected with the flow pump, beneficial effect: the test solutions with different proportions can be conveniently prepared.

Further, the slag-liquid mixing device comprises a mixing pipe and a turbine mixer; the turbine mixer is arranged in the mixing pipe; mixing tube one end is connected with the flow pump, and the other end is connected with operating mode analogue means, beneficial effect: through the vortex mixer, the test liquid flows in the mixing pipe in a vortex state, so that the test liquid and the slag are uniformly mixed.

Further, the slag inlet funnel is arranged on the mixing pipe; the slag inlet funnel is provided with a slag inlet which is communicated with the mixing pipe; it advances the regulating plate of cinder notch size to be equipped with control on the sediment funnel, beneficial effect: the speed of the slag entering the mixing pipe is controlled by the adjusting plate, so that slag and liquid are mixed more uniformly.

Further, the working condition simulation device comprises a transparent pipeline and a drill rod, wherein one end of the transparent pipeline is connected with the mixing device, and the other end of the transparent pipeline is provided with an opening; one end of the drill rod penetrates through the opening and is arranged in the transparent pipeline, and the other end of the drill rod is connected with the speed regulating motor; the adjustable speed motor is arranged on the lifting platform, and has the advantages that: a drill rod is arranged in the transparent pipeline, and the influence of the drill rod on the resistance reducing agent in the drill hole in the actual working condition is simulated.

Further, collection device includes surge drum, filter screen, the filter screen is located in the surge drum, the surge drum is located transparent pipeline opening below, beneficial effect: and collecting the discharged slag by using a collecting cylinder, and separating slag from liquid by using a filter screen.

The invention has the beneficial effects that: after the resistance reducing agent and the slag are quantitatively blended according to a set proportion, the resistance reducing agent and the slag are uniformly mixed through a mixing pipe, and then the mixture enters a working condition simulation device to simulate the influence of water flow, slag components and drill rod movement on the slag carrying capacity of the resistance reducing agent, so that the measurement result can directly reflect the slag carrying capacity of the resistance reducing agent under the actual working condition; meanwhile, the stacking angle and the stacking height of the slag are measured, and the stacking condition of the slag in the pipeline under the working condition is judged, so that the integral slag discharging effect caused by the resistance reducing agent under the working condition is reflected, and the direct guidance effect on the selection and application of the resistance reducing agent is achieved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of the entire detecting device of the present invention;

FIG. 2 is a partial schematic view of the transparent conduit of FIG. 1;

reference numerals: 1. a stirrer; 2. a water tank; 3. a mixing tube; 4. a turbine mixer; 5. a flow pump; 6. a slag inlet funnel; 7. a transparent conduit; 8. a collection canister; 9. a drill stem; 10. a speed-regulating motor; 11. a lifting platform; 12. an adjusting plate; 13. and (5) accumulating coal slag.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

The detection method of the slag carrying capacity of the resistance reducing agent mainly comprises the following implementation steps:

A. preparing a test solution: blending the resistance reducing agent to be tested according to a set proportion, uniformly mixing, and preparing into a test solution;

B. preparing slag: weighing the slag;

C. mixing the slag and the liquid: mixing the test solution prepared in the step A with the slag in the step B according to a set flow rate, and uniformly mixing the test solution with the slag to prepare a mixed solution;

D. and (3) working condition simulation: c, introducing the mixed liquid prepared in the step C into a working condition simulation device to simulate the influence of the movement condition of a drill rod and the size of a drilled hole on the mixed liquid under the actual working condition; finally, discharging the mixed liquid from the working condition simulation device;

E. collecting: collecting and filtering the discharged slag, taking out the slag and drying the slag;

F. measurement and evaluation: and E, weighing the slag in the step E to obtain the weight of the discharged slag, and dividing the weight of the discharged slag by the total weight of the slag in the step B to obtain the slag carrying capacity of the resistance reducing agent.

Referring to fig. 1 to 2, the exemplary detection device of the present invention includes a liquid preparation device for preparing a test liquid, a slag-liquid mixing device, and a working condition simulation device, wherein the working condition simulation device includes a transparent pipe 7 and a drill rod 9, one end of the transparent pipe 7 is connected to the mixing pipe 3, and the other end is provided with an opening; one end of the drill rod 9 passes through the opening of the transparent pipeline 7 and is arranged in the transparent pipeline 7, and the other end of the drill rod is arranged on the speed regulating motor 10; the speed regulating motor 10 is fixedly arranged on the lifting platform 11, and the lifting platform 11 is provided with a linear motor for driving the lifting platform to move up and down; the liquid preparation device comprises a water tank 2 and a stirrer 1, wherein the stirrer 1 is arranged on the water tank 2, and the water tank 2 is connected with a flow pump 5 through a pipeline; the slag-liquid mixing device comprises a mixing pipe 3 and a turbine mixer 4; the turbine mixer 4 is arranged in the mixing pipe 3; one end of the mixing pipe 3 is fixedly connected with the flow pump 5, and the other end is connected and communicated with the transparent pipeline 7; the slag inlet funnel 6 is arranged on the mixing pipe 3; the lower end of the slag inlet funnel 6 is provided with a slag inlet which is communicated with the mixing pipe 3; an adjusting plate 12 for controlling the size of the slag inlet by drawing is arranged at the slag inlet; the collecting device comprises a collecting cylinder 8 and a filter screen, the filter screen is arranged in the collecting cylinder 8, and the collecting cylinder 8 is placed below the opening of the transparent pipeline 7.

Example 1

A method for detecting slag carrying capacity of a resistance reducing agent comprises the following steps:

A. preparing a test solution: preparing a test solution by using 0.05% of resistance reducing agent and clear water by mass percent, injecting the test solution into a water tank 2, and starting a stirrer 1 to uniformly mix the test solution;

B. preparing slag: according to the mass percentage: 30% of 60-mesh cinder, 40% of 40-mesh cinder and 30% of 20-mesh cinder, preparing 1kg of cinder with mixed grain diameter, and putting the cinder into a cinder feeding hopper 6;

C. mixing the slag and the liquid: starting the flow pump 5, adjusting the flow rate of the flow pump 5 to 50L/min, and enabling the test solution to enter the mixing tube 3, wherein the inner diameter of the mixing tube 3 is 25 mm; simultaneously, the adjusting plate 12 on the slag feeding funnel 6 is drawn to ensure that the coal slag is put into the mixing pipe 3 at the speed of 0.1kg/min, and the turbine mixer 4 in the mixing pipe 3 ensures that the test liquid flows in a vortex state, so that the test liquid and the coal slag are uniformly mixed and flow to the transparent pipeline 7;

D. and (3) working condition simulation: in the working condition simulation device, the inner diameter of the transparent pipeline 7 is 113mm, the diameter of the drill rod 9 is 75mm, when the mixed liquid prepared in the step C enters the transparent pipeline 7, the speed regulating motor 10 is started, the rotating speed of the drill rod 9 is adjusted to be 80r/min, and the linear motor on the lifting platform 11 is started to enable the drill rod 9 to move up and down; finally the mixed liquid flows out from the opening of the transparent pipe 7;

E. collecting: collecting and filtering the coal cinder discharged from the transparent pipeline 7 by using a collecting cylinder 8, and taking out the coal cinder for drying;

F. measurement and evaluation: weighing the coal cinder in the step E to obtain the weight of the discharged coal cinder, and dividing the weight of the discharged coal cinder by the total weight of the coal cinder put in the step B; meanwhile, when the accumulated coal slag 13 in the transparent pipe 7 is not changed any more, the accumulated angle theta and the accumulated height H formed by the accumulated coal slag 13 remaining in the transparent pipe 7 are measured.

Example 2

The embodiment comprises the following steps:

A. preparing a test solution: preparing a test solution by using 0.1% of resistance reducing agent and clear water by mass percent, injecting the test solution into a water tank 2, and starting a stirrer 1 to uniformly mix the test solution;

B. preparing slag: according to the mass percentage: 40% of 60-mesh cinder, 30% of 40-mesh cinder and 30% of 20-mesh cinder, preparing 1kg of cinder with mixed grain diameter, and putting the cinder into a cinder feeding hopper 6;

C. mixing the slag and the liquid: starting the flow pump 5, setting the flow rate of the flow pump 5 to be 60L/min, and enabling the test solution to enter the mixing pipe 3, wherein the inner diameter of the mixing pipe 3 is 25 mm; simultaneously, the adjusting plate 12 on the slag feeding funnel 6 is drawn to ensure that the coal slag is put into the mixing pipe 3 at the speed of 0.1kg/min, and the turbine mixer 4 in the mixing pipe 3 ensures that the test liquid flows in a vortex state, so that the test liquid and the coal slag are uniformly mixed and flow to the transparent pipeline 7;

D. and (3) working condition simulation: in the working condition simulation device, the inner diameter of the transparent pipeline 7 is 113mm, the diameter of the drill rod 9 is 63mm, when the mixed liquid prepared in the step C enters the transparent pipeline 7, the speed regulating motor 10 is started, the rotating speed of the drill rod 9 is regulated to 70r/min, and the position of the lifting platform 11 is regulated, so that the drill rod 9 is positioned at the center of the transparent pipeline 7; finally the mixed liquid flows out from the opening of the transparent pipe 7;

E. collecting: collecting and filtering the coal cinder discharged from the transparent pipeline 7 by using a collecting cylinder 8, and taking out the coal cinder for drying;

F. measurement and evaluation: weighing the coal cinder in the step E to obtain the weight of the discharged coal cinder, and dividing the weight of the discharged coal cinder by the total weight of the coal cinder put in the step B; meanwhile, when the accumulated coal slag 13 in the transparent pipeline 7 is not changed any more, the protractor is used for measuring an accumulated angle theta and an accumulated height H formed by the accumulated coal slag 13 remained in the transparent pipeline 7.

Example 3

The embodiment comprises the following steps:

A. preparing a test solution: preparing a test solution by using 0.5 mass percent of resistance reducing agent and clear water, injecting the test solution into a water tank 2, and starting a stirrer 1 to uniformly mix the test solution;

B. preparing slag: according to the mass percentage of the coal slag: 30% of 60-mesh cinder, 30% of 40-mesh cinder and 40% of 20-mesh cinder, preparing 1kg of cinder with mixed grain diameter, and putting the cinder into a cinder feeding hopper 6;

C. mixing the slag and the liquid: starting the flow pump 5, setting the flow rate of the flow pump 5 to be 70L/min, and enabling the test solution to enter the mixing pipe 3, wherein the inner diameter of the mixing pipe 3 is 25 mm; simultaneously, the adjusting plate 12 on the slag feeding funnel 6 is drawn to ensure that the coal slag is put into the mixing pipe 3 at the speed of 0.1kg/min, and the turbine mixer 4 in the mixing pipe 3 ensures that the test liquid flows in a vortex state, so that the test liquid and the coal slag are uniformly mixed and flow to the transparent pipeline 7;

D. and (3) working condition simulation: in the working condition simulation device, the inner diameter of the transparent pipeline 7 is 130mm, the diameter of the drill rod 9 is 75mm, when the mixed liquid prepared in the step C enters the transparent pipeline 7, the speed regulating motor 10 is started, the rotating speed of the drill rod 9 is regulated to 80r/min, and the linear motor on the lifting platform 11 is regulated to ensure that the drill rod 9 is attached to the lower inner wall of the transparent pipeline 7; finally the mixed liquid flows out from the opening of the transparent pipe 7;

E. collecting: collecting and filtering the coal cinder discharged from the transparent pipeline 7 by using a collecting cylinder 8, and taking out the coal cinder for drying;

F. measurement and evaluation: weighing the coal cinder in the step E to obtain the weight of the discharged coal cinder, and dividing the weight of the discharged coal cinder by the total weight of the coal cinder put in the step B; meanwhile, when the accumulated coal slag 13 in the transparent pipeline 7 is not changed any more, the protractor is used for measuring an accumulated angle theta and an accumulated height H formed by the accumulated coal slag 13 remained in the transparent pipeline 7.

The results measured in step F of examples 1, 2 and 3 are summarized in table 1.

TABLE 1

As can be seen from table 1, the slag carrying capacity of the friction reducer increases with the mass percentage, the stacking angle θ and the stacking height H formed by the coal slag stacked in the pipeline decrease with the mass percentage, and the overall slag discharging effect increases with the mass percentage of the friction reducer.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.