阅读说明：本技术 一种水煤浆球磨机系统 (Coal water slurry ball mill system ) 是由 林世强 黄敬华 李志嵩 张擎 于 2021-07-13 设计创作，主要内容包括：本申请公开了一种水煤浆球磨机系统,包括：球磨机；螺旋给料机,所述螺旋给料机的出料口与所述球磨机的进料口连接；称重皮带机,所述称重皮带机的末端设有落煤管,所述落煤管与所述螺旋给料机的进料口连接；给水管道,所述给水管道用于提供燃煤混合用水,所述给水管道设有相互并联的给水主路和给水旁路,所述给水主路与所述球磨机连通,所述给水旁路与所述落煤管连通。本申请的水煤浆球磨机系统,能够有效避免螺旋给料机堵塞,从而避免球磨机停运的事故发生。(The application discloses coal slurry ball mill system includes: a ball mill; the discharge port of the screw feeder is connected with the feed port of the ball mill; the tail end of the weighing belt conveyor is provided with a coal dropping pipe, and the coal dropping pipe is connected with a feeding hole of the screw feeder; the coal-fired water supply system comprises a coal-fired mixing water supply pipeline, a ball mill and a coal dropping pipe, wherein the coal-fired mixing water supply pipeline is used for supplying coal-fired mixing water, the water supply pipeline is provided with a water supply main circuit and a water supply bypass which are connected in parallel, the water supply main circuit is communicated with the ball mill, and the water supply bypass is communicated with the coal dropping pipe. The utility model provides a coal slurry ball mill system can effectively avoid screw feeder to block up to avoid the occurence of failure of ball mill outage.)

1. A coal water slurry ball mill system, comprising:

a ball mill (100);

a discharge port of the screw feeder (200) is connected with a feed port of the ball mill (100);

the coal feeding device comprises a weighing belt conveyor (300), wherein a coal dropping pipe (310) is arranged at the tail end of the weighing belt conveyor (300), and the coal dropping pipe (310) is connected with a feeding hole of the screw feeder (200);

the coal-fired water supply system comprises a water supply pipeline (400), wherein the water supply pipeline (400) is used for providing coal-fired mixed water, the water supply pipeline (400) is provided with a water supply main path (410) and a first water supply bypass (420) which are connected in parallel, the water supply main path (410) is communicated with the ball mill (100), and the first water supply bypass (420) is communicated with the coal dropping pipe (310).

2. The coal-water slurry ball mill system according to claim 1, further comprising a controller, wherein the first water supply bypass (420) is provided with a second flow regulating valve (440), the weighing belt conveyor (300) is provided with a humidity sensor, the humidity sensor is used for measuring the humidity of coal fired on the weighing belt conveyor (300), and the controller is connected with the humidity sensor and the second flow regulating valve (440) so as to control the flow of the second flow regulating valve (440) according to the measurement value of the humidity sensor.

3. The coal-water slurry ball mill system according to claim 2, wherein the controller is further configured to obtain first time information and second time information, and generate control information for the second flow regulating valve (440) according to the first time information and the second time information, the first time information is conveying time of the fire coal conveyed from the humidity sensor to the end of the weighing belt conveyor (300), and the second time information is falling time of the fire coal falling from the end of the weighing belt conveyor (300) to the outlet of the first water supply bypass (420).

4. The coal-water slurry ball mill system according to claim 2, characterized in that the water feeding pipe (400) is further provided with a second water feeding bypass, the second water feeding bypass is connected in parallel with the water feeding main circuit (410) and the first water feeding bypass (420), the second water feeding bypass is communicated with the screw feeder (200), the screw feeder (200) is provided with a pressure sensor for measuring the pressure to which the inner wall of the cavity of the screw feeder (200) is subjected, the water feeding main circuit (410) is provided with a main circuit valve (430), the second water feeding bypass is provided with a bypass valve, the pressure sensor, the main circuit valve (430) and the bypass valve are connected with the controller, the controller is used for controlling the main circuit valve (430) to be closed and the bypass valve to be opened when the measured value of the pressure sensor is greater than or equal to a first preset value, and controls the main path valve (430) to be opened and the bypass valve to be closed when the measured value of the pressure sensor is less than the first preset value.

5. The coal-water slurry ball mill system according to claim 4, wherein the second water supply bypass is provided with at least two water supply branches, the at least two water supply branches are distributed on the screw feeder (200) and are communicated with each other, each water supply branch is provided with the bypass valve, the pressure sensors are provided with at least two pressure sensors and are in one-to-one correspondence with the at least two water supply branches, and the controller is used for controlling the corresponding bypass valves to work according to the measured values of the at least two pressure sensors.

6. The coal-water slurry ball mill system according to claim 4, wherein a mounting groove is formed in the inner wall of the cavity of the screw feeder (200), the mounting groove is obliquely arranged towards the advancing direction of the fire coal, and the second water supply bypass is communicated with the bottom of the mounting groove.

7. The coal-water slurry ball mill system according to claim 4, wherein the controller is connected with an alarm, and the controller is used for sending a first alarm signal to the alarm when the opening time of the bypass valve reaches a preset time and the measurement value of the pressure sensor is still greater than or equal to a first preset value.

8. The coal-water slurry ball mill system according to any one of claims 4 or 7, wherein the controller is connected with an alarm, and the controller is used for sending a second alarm signal to the alarm when the measured value of the pressure sensor is greater than or equal to a second preset value, wherein the second preset value is greater than the first preset value.

9. The coal-water slurry ball mill system according to claim 2, wherein the humidity sensor is arranged at the end of the weighing belt conveyor (300), and the outlet of the first water supply bypass (420) is positioned at the inlet of the coal dropping pipe (310).

10. The coal-water slurry ball mill system according to claim 1, characterized in that an outlet of the first water supply bypass (420) is provided with a sprayer.

Technical Field

The invention belongs to the technical field of coal water slurry production equipment, and particularly relates to a coal water slurry ball mill system.

Background

In the production process of the water coal slurry, a ball mill is needed to grind the fire coal, the fire coal is mixed with added industrial water and a dispersing agent, and the fire coal is horizontally conveyed to the ball mill through a weighing belt conveyor and a screw feeder. Due to the fact that the quality of the fire coal is poor (such as high viscosity) and the fire coal is mixed with impurities and other uncontrollable factors, the fire coal is accumulated in the spiral feeder, so that accidents of coal breaking and no-load of the ball mill are caused, steel balls in the ball mill directly rub and impact with a lining plate due to the fact that the coal breaking and the no-load of the ball mill occur, heat is generated due to the accidents, the heat is conducted to a bearing bush, tile burning is caused, and finally the ball mill is stopped.

Accordingly, the prior art is in need of improvement and development.

Disclosure of Invention

The embodiment of the application provides a coal water slurry ball mill system, can effectively avoid the screw feeder to block up to avoid the occurence of failure of ball mill outage.

In order to solve the technical problem, the coal water slurry ball mill system provided by the embodiment of the application comprises:

a ball mill;

the discharge port of the screw feeder is connected with the feed port of the ball mill;

the tail end of the weighing belt conveyor is provided with a coal dropping pipe, and the coal dropping pipe is connected with a feeding hole of the screw feeder;

the coal-fired water supply system comprises a water supply pipeline, wherein the water supply pipeline is used for providing coal-fired mixed water, the water supply pipeline is provided with a water supply main path and a first water supply bypass which are connected in parallel, the water supply main path is communicated with the ball mill, and the first water supply bypass is communicated with the coal dropping pipe.

Further, this coal slurry ball mill system still includes the controller, first feedwater bypass is equipped with the second flow control valve, the belt feeder of weighing is equipped with humidity transducer, humidity transducer is used for measuring the humidity of coal-fired on the belt feeder of weighing, the controller with humidity transducer, second flow control valve are connected, in order to the basis humidity transducer's measured value control the flow of second flow control valve.

Further, the controller is further configured to obtain first time information and second time information, and generate control information for the second flow rate regulating valve according to the first time information and the second time information, where the first time information is a conveying time of the coal from the humidity sensor to the end of the weighing belt conveyor, and the second time information is a falling time of the coal from the end of the weighing belt conveyor to the first water supply bypass outlet.

Further, the water supply pipeline is further provided with a second water supply bypass, the second water supply bypass is connected with the main water supply path and the first water supply bypass in parallel, the second water supply bypass is communicated with the screw feeder, the screw feeder is provided with a pressure sensor, the pressure sensor is used for measuring pressure applied to the inner wall of the cavity of the screw feeder, the main water supply path is provided with a main path valve, the second water supply bypass is provided with a bypass valve, the pressure sensor, the main path valve and the bypass valve are connected with the controller, and the controller is used for controlling the main path valve to be closed and the bypass valve to be opened when a measured value of the pressure sensor is greater than or equal to a first preset value, and controlling the main path valve to be opened and the bypass valve to be closed when the measured value of the pressure sensor is smaller than the first preset value.

Furthermore, the second water supply bypass is provided with at least two water supply branches, the at least two water supply branches are distributed and communicated on the screw feeder, each water supply branch is provided with a bypass valve, the pressure sensors are provided with at least two pressure sensors and correspond to the at least two water supply branches one to one, and the controller is used for controlling the corresponding bypass valves to work according to the measured values of the at least two pressure sensors.

Further, a mounting groove is formed in the inner wall of the cavity of the spiral feeder, the mounting groove is obliquely arranged towards the advancing direction of the fire coal, and the second water supply bypass is communicated with the bottom of the mounting groove.

Further, the controller is connected with an alarm, and the controller is used for sending a first alarm signal to the alarm when the opening time of the bypass valve reaches a preset time and the measurement value of the pressure sensor is still larger than or equal to a first preset value.

Further, the controller is connected with an alarm, and the controller is used for sending a second alarm signal to the alarm when the measured value of the pressure sensor is greater than or equal to a second preset value, wherein the second preset value is greater than the first preset value.

Further, the humidity sensor is arranged at the tail end of the weighing belt conveyor, and an outlet of the first water supply bypass is located at an inlet of the coal dropping pipe.

Further, a sprayer is arranged at an outlet of the first water supply bypass.

The utility model provides a coal slurry ball mill system through setting up first feedwater bypass intercommunication coal breakage pipe, before coal-fired entering screw feeder, utilizes the industrial water that carries out mixing in adding the ball mill to carry out moist to the coal-fired, improves the mobility of coal-fired to effectively avoid the coal-fired spiral feeder to pile up and lead to screw feeder to block up in screw feeder inside, thereby avoid the occurence of failure of ball mill outage.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

Fig. 1 is a schematic structural diagram of a coal-water slurry ball mill system according to an embodiment of the present application.

Fig. 2 is an enlarged view of fig. 1 at K.

Description of reference numerals: 100. a ball mill; 200. a screw feeder; 210. a screw shaft; 220. a helical blade; 230. mounting grooves; 300. weighing a belt conveyor; 310. a coal dropping pipe; 400. a water supply pipe; 410. a main water supply path; 420. a first feed water bypass; 430. a main path valve; 440. a second flow regulating valve; 450. a second feed water bypass; 451. a water supply branch; 460. a bypass valve; 470. a sprayer; 480. a first flow regulating valve; 500. a tamper assembly; 510. a tamping rod; 600. a knockout plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

As shown in fig. 1 and 2, the water-coal-slurry ball mill system of the present invention comprises:

a ball mill 100;

a discharge port of the screw feeder 200 is connected with a feed port of the ball mill 100;

the end of the weighing belt conveyor 300 is provided with a coal dropping pipe 310, and the coal dropping pipe 310 is connected with the feeding hole of the screw feeder 200;

the water supply pipeline 400 is used for providing coal-fired mixed water, the water supply pipeline 400 is provided with a main water supply path 410 and a first water supply bypass 420 which are connected in parallel, the main water supply path 410 is communicated with the ball mill 100, and the first water supply bypass 420 is communicated with the coal dropping pipe 310.

Specifically, the fire coal is conveyed to the ball mill 100 from the previous process through the weighing belt conveyor 300, falls into the screw feeder 200 from the end of the weighing belt conveyor 300, is pushed by the helical blades 220 of the screw feeder 200, and is conveyed into the ball mill 100, and during the process of grinding the fire coal by the ball mill 100, industrial water, namely the fire coal mixed water, is further input into the ball mill 100 and is mixed with the fire coal to form water-coal slurry, and the input water amount can be regulated and controlled through the first flow regulating valve 480, and is provided with power by the water supply pump. In the concrete application, the water supply pipe 400 is connected to the water supply pump through the first flow regulating valve 480, a part of the coal-fired mixed water is directly conveyed into the ball mill 100 through the main water supply path 410 and is mixed with the coal-fired in the ball mill 100, and the other part of the coal-fired mixed water is conveyed to the coal dropping pipe 310 through the first water supply bypass 420, so that the coal-fired to enter the screw feeder 200 is wetted, the fluidity of the coal-fired is improved, the blockage of the screw feeder 200 caused by the accumulation of the coal-fired in the screw feeder 200 is effectively avoided on the premise of not changing the water inflow of the coal-fired mixed water, and the accident that the ball mill 100 stops is avoided. Specifically, a through hole may be formed in the coal dropping pipe 310 to communicate with the first water supply bypass 420.

In some preferred embodiments, the coal-water slurry ball mill system 100 further includes a controller (not shown), the first water supply bypass 420 is provided with a second flow regulating valve 440, the weighing belt conveyor 300 is provided with a humidity sensor (not shown) for measuring the humidity of the coal on the weighing belt conveyor 300, and the controller is connected to the humidity sensor and the second flow regulating valve 440 to control the flow of the second flow regulating valve 440 according to the measurement value of the humidity sensor. Through the technical means, the flow of the second flow regulating valve 440 can be controlled according to the humidity of the coal on the weighing belt conveyor 300, so that the humidity of the coal in the screw feeder 200 can be controlled, the coal in the screw feeder 200 can be maintained in a certain humidity range, and the feeding uniformity and stability of the screw feeder 200 can be controlled. In a more preferred embodiment, the humidity sensor is disposed at the end of the weighing belt conveyor 300, and the outlet of the first water supply bypass 420 is located at the inlet of the coal dropping pipe 310, so that an error caused by the control operation (the controller controls the flow rate of the second flow rate adjusting valve 440 according to the measurement value of the humidity sensor) due to the delivery time of the coal from the humidity sensor to the outlet of the first water supply bypass 420 can be minimized or eliminated. In particular, the humidity sensor and its installation and use may employ existing technical means.

In some preferred embodiments, the controller is further configured to obtain first time information and second time information, and generate control information for the second flow rate adjusting valve 440 according to the first time information and the second time information, where the first time information is a conveying time of the fire coal conveyed from the humidity sensor to the end of the weighing belt conveyor 300, and the second time information is a falling time of the fire coal falling from the end of the weighing belt conveyor 300 to the outlet of the first water supply bypass 420. In specific application, after the fire coal passes through the humidity sensor, the fire coal needs to enter the coal dropping pipe 310 from the tail end of the weighing belt conveyor 300 after a period of time, and then falls through the outlet of the first water supply bypass 420 after a period of time, the controller controls the second flow regulating valve 440 (specifically regulates the flow of the second flow regulating valve 440) according to the first time information and the second time information, the humidity of the fire coal can be regulated more accurately, and errors caused by the control work (the controller controls the flow of the second flow regulating valve 440 according to the measured value of the humidity sensor) due to the conveying time existing between the fire coal and the outlet of the first water supply bypass 420 can be reduced as much as possible.

Specifically, the weighing belt conveyor 300 is provided with a set flow rate of the material (specifically, the set flow rate is set by a controller of the weighing belt conveyor 300, which is the prior art), and the actual flow rate of the material is kept at the set flow rate by adjusting the belt running speed of the weighing belt conveyor 300, when the material is conveyed in a stable state, the belt running speed can be maintained at a relatively stable value (or can float within a small range), therefore, a material conveying speed can be correspondingly stored for each set flow rate through the controller, when the installation position of the humidity sensor and the set flow rate of the weighing belt conveyor 300 are determined, the first time information can be obtained through the controller according to the distance between the humidity sensor and the end of the weighing belt conveyor 300 and the material conveying speed, the distance between the humidity sensor and the end of the weighing belt conveyor 300 can be manually input into the controller, the running speed of the belt can be manually input into the controller, and can also be connected with the weighing belt conveyor 300 through the controller, so that the controller can acquire the running speed from the weighing belt conveyor 300. According to the theory of free falling of objects (ignoring the horizontal conveying speed of the fire coal), a controller correspondingly stores second time information for each height position of the coal dropping pipe 310 (corresponding to the distance between the tail end of the weighing belt conveyor 300 and the outlet of the first water supply bypass 420), and when the fire coal does not vertically fall, for example, the coal dropping pipe 310 is arranged in a bent arc, the time of the fire coal falling to any height position of the coal dropping pipe 310 can be obtained through a limited number of tests, and the time is correspondingly stored in the controller in advance.

In some preferred embodiments, the feed water pipe 400 is further provided with a second feed water bypass 450, the second feedwater bypass 450 is connected in parallel with the feedwater main circuit 410 and the first feedwater bypass 420, the second water supply bypass 450 is communicated with the screw feeder 200, the screw feeder 200 is provided with a pressure sensor (not shown in the figure), the pressure sensor is used for measuring the pressure to which the inner wall of the cavity of the screw feeder 200 is subjected, the main water supply line 410 is provided with a main line valve 430, the second water supply bypass 450 is provided with a bypass valve 460, the pressure sensor, main valve 430 and bypass valve 460 are connected to the controller, the controller is configured to control the main valve 430 to be closed and the bypass valve 460 to be opened when the measured value of the pressure sensor is greater than or equal to a first preset value, and controls the main valve 430 to be opened and the bypass valve 460 to be closed when the measured value of the pressure sensor is less than the first preset value. In a specific application, when the spiral feeder 200 is feeding normally, the pressure applied to the inner wall of the cavity of the spiral feeder 200 is kept stable, when the coal in the spiral feeder 200 is accumulated and forms blockage of different degrees, the pressure applied to the inner wall of the cavity of the spiral feeder 200 is correspondingly increased, that is, the pressure value can reflect the degree of blockage, the corresponding pressure value can be detected in daily work, the first preset value can be set according to the pressure applied to the inner wall of the cavity when the coal is accumulated and forms blockage of different degrees, specifically to the embodiment, the first preset value is the pressure value applied to the inner wall of the cavity of the spiral feeder 200 when the coal is accumulated and forms blockage, according to the technical scheme, when the coal is accumulated and forms blockage, the bypass valve 460 is opened and the main valve 430 is closed, so that one path of mixed water directly conveyed to the ball mill 100 through the main water supply path 410 is injected into the spiral feeder 200, the main valve 430 is opened again to close the bypass valve 460 and the normal water supply is resumed when the screw feeder 200 resumes the normal working state, that is, the measured value of the pressure sensor is smaller than the first preset value.

In some preferred embodiments, the second water supply bypass 450 is provided with at least two water supply branches 451, the at least two water supply branches 451 are distributed on and communicated with the screw feeder 200, each water supply branch 451 is provided with the bypass valve 460, the pressure sensors are provided with at least two pressure sensors and are in one-to-one correspondence with the at least two water supply branches 451, and the controller is configured to control the corresponding bypass valves 460 to operate according to the measured values of the at least two pressure sensors. Through the technical scheme, the blockage can be dredged more pertinently, and the final blockage can be effectively avoided. As a more preferable embodiment, specifically to the present embodiment, the water supply branch 451 is provided with three, which are respectively disposed at the front, middle and rear sections of the screw feeder 200, and the pressure sensors are correspondingly provided with three, which are correspondingly disposed at the front, middle and rear sections of the screw feeder 200. In particular, the pressure sensor (including its installation and use) may be implemented by existing techniques, such as a pressure sensor applied to detect the pressure of the inner wall of the material conveying pipe. Specifically, the first and second flow regulating valves 480 and 440 may employ a flow regulating valve for regulating the flow of the pipe liquid in the related art, and the main and bypass valves 430 and 460 may employ a solenoid valve or a pneumatic valve in the related art.

In some preferred embodiments, a mounting groove 230 is provided on an inner wall of the cavity of the screw feeder 200, the mounting groove 230 is inclined toward the advancing direction of the coal, and the second water supply bypass 450 is communicated with the bottom of the mounting groove 230. Through the technical scheme, the installation groove 230 obliquely arranged towards the advancing direction (such as the direction L in fig. 2) of the coal is communicated with the second water supply bypass 460, so that the phenomenon that the coal is accumulated and blocked at the outlet of the second water supply bypass 460 to interfere with work when the coal is pushed to advance can be effectively avoided.

In some preferred embodiments, an alarm is connected to the controller, and the controller is configured to send a first alarm signal to the alarm when the opening time of the bypass valve 460 reaches a preset time and the measurement value of the pressure sensor is still greater than or equal to a first preset value. In the concrete application, as described above, when the pressure that receives on the intracavity wall of screw feeder 200 is greater than or equal to first default, bypass valve 460 of second feedwater bypass 450 can open to pour into coal-fired mixing water all the way and dredge accumulational fire coal, after this water injection mediation work carries out a period of time (above-mentioned preset time is set for according to the general demand time of mediation work), pressure sensor's measured value still fails to reduce, can be in order to tentatively judge that accumulational fire coal can't dredge automatically, probably need manual intervention, let the workman know through taking place first alarm signal to the alarm, in time adjust production work.

In some preferred embodiments, the controller is further configured to send a second alarm signal to the alarm when a measurement value of the pressure sensor is greater than or equal to a second preset value, where the second preset value is greater than the first preset value. In the concrete application, when the blocking condition is serious and can not be dredged automatically in the screw feeder 200, manual intervention is needed, and according to the technical scheme, when the measured value of the pressure sensor is greater than or equal to a second preset value through the controller (the corresponding pressure value received by the inner wall of the cavity is set as the second preset pressure value), a second alarm signal is sent to the alarm, so that a worker can know timely and adjust production work timely. Specifically, the above alarm may adopt the existing technical means, such as a buzzer, a warning light, etc., and as a preferred embodiment, the controller further sends a warning window to the operation screen of the worker.

In some preferred embodiments, the outlet of the first feedwater bypass 420 is provided with a sprayer 470. According to the technical scheme, the water outlet flow is distributed through the sprayer 470, and passing fire coal can be wetted more uniformly. Specifically, the sprayer 470 may employ a sprayer in the related art.

In some preferred embodiments, a plurality of tamper assemblies 500 are fixed on the screw shaft 210 of the screw feeder 200, and the tamper assemblies 500 are arranged in an equidistant staggered arrangement with the screw blades 220 of the screw feeder 200. In specific application, when the spiral shaft 210 of the spiral feeder 200 rotates to propel the fire coal, the tamping rod assembly 500 rotates to stir the fire coal, so that the fire coal can be loosened, the massive fire coal can be further crushed, and the flow of the fire coal is promoted to avoid accumulation.

In some preferred embodiments, the tamper assembly 500 comprises at least two tamper rods 510, one end of each tamper rod 510 is connected to the other end of each tamper rod 510 in a manner of overlapping, and the other ends of the tamper rods 510 are arranged in a radial manner.

In some preferred embodiments, there are three tamping rods 510, three tamping rods 510 are sequentially arranged in a direction parallel to the spiral shaft 210, and form a plane, the middle tamping rod 510 is arranged in the forward direction, and the front and rear tamping rods 510 are respectively arranged in the upward direction in the forward and backward directions.

In some preferred embodiments, a material hitting plate 600 is disposed above the discharge port of the screw feeder 200, and the material hitting plate 600 is disposed on an upward side of the rotation tangential direction of the screw shaft 210 of the screw feeder 200. In specific application, when the fire coal in the screw feeder 200 is pushed to the discharge port and part of the fire coal is adhered to the screw shaft 210 or the screw blade 220 and rotates along with the rotation of the screw shaft and passes through the discharge port, the fire coal collides with the upper part of the discharge port and is provided with the material beating plate 600, and the fire coal is favorably fallen off from the screw shaft 210 or the screw blade 220 and falls out of the discharge port.

In some preferred embodiments, the edges of the helical blades 220 of the screw feeder 200 are provided with tooth-like grooves (not shown). Through the technical scheme, the toothed grooves at the edges of the spiral blades 220 can loosen the fire coal while propelling the fire coal, so that the fire coal is promoted to flow to avoid accumulation.

Specifically, the ball mill 100, the screw feeder 200 and the weighing belt conveyor 300 may adopt the existing technical means, and the detailed description of the structure thereof is omitted here, and particularly, the ball mill 100 adopts an intermittent ball mill.

The utility model provides a coal slurry ball mill system through setting up first water supply bypass 420 intercommunication coal breakage pipe 310, before coal-fired entering screw feeder 200, utilizes the industrial water that carries out the mixture among the joining ball mill 100 to moisten the coal-fired, improves the mobility of coal-fired to effectively avoid the coal-fired spiral feeder 200 to pile up and lead to screw feeder 200 to block up in screw feeder 200 is inside, thereby avoid the occurence of failure of ball mill 100 shutdown. The flow of the second flow regulating valve 440 arranged on the first water supply bypass 420 is controlled by the controller according to the measured value of the humidity sensor arranged on the weighing belt conveyor 300, so that the fire coal in the screw feeder 200 can be maintained in a certain humidity range, and the feeding uniformity and stability of the screw feeder 200 are favorably controlled. The controller controls the second flow rate adjusting valve 440 according to the first time information and the second time information, so that the humidity of the coal can be adjusted more accurately, and errors caused by the conveying time between the coal from the humidity sensor and the outlet of the first water supply bypass 420 can be reduced as much as possible. By arranging the second water supply bypass 450 to be communicated with the screw feeder 200, when the coal accumulation starts to form blockage, the bypass valve 460 of the second water supply bypass 450 is opened and the main path valve 430 of the main water supply path 410 is closed, so that one path of coal mixed water directly conveyed to the ball mill 100 through the main water supply path 410 is injected into the screw feeder 200, the fluidity of the coal is firstly improved, the accumulated coal is timely dredged, and the phenomenon that the final blockage is formed to influence the working process is avoided. Through setting up the alarm, can send alarm signal when accumulational fire coal can't automatic mediation, let the workman know and in time adjust production work.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.