A fine coal blending device for gasification

Abstract

This invention belongs to the technical field of coal blending equipment, specifically relating to a refined coal blending device for gasification, comprising: a raw coal precision feeding system, including multiple corresponding raw coal silos and a quantitative feeding component for quantitatively blending and outputting various raw coals; a coal conveying system, including a conveyor belt and a leveling unit, wherein the conveyor belt is horizontally positioned between the quantitative feeding component and the mixing system, and the leveling unit is positioned on the upper side of the conveyor belt for leveling the raw coal on the conveyor belt; an online detection system for acquiring coal quality data of the industrial composition, elemental composition, and ash chemical composition of each type of raw coal in the mixed raw coal on the conveyor belt; and a central control system for comparing the coal quality data acquired by the online detection system with a preset coal quality data range to control the coal output flow of each raw coal silo in the raw coal precision feeding system, thereby improving the coal blending accuracy and obtaining coal quality that meets the requirements for gasification.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of coal blending equipment, and particularly relates to a fine coal blending device for gasification. BACKGROUND

[0002] The coal for gasification refers to coal that can obtain gas raw materials through chemical processing, and the process can be described as follows: under certain temperature and pressure conditions, the organic matter in the coal is converted into chemical raw gas. The coal for gasification is usually required to have appropriate chemical reaction performance, ash fusion, ash content and volatile matter, and low sulfur content.

[0003] The coal quality of the coal for gasification has multiple indexes. For the fluidized bed gasification furnace, the industrial analysis index, the element analysis index and the ash chemical composition are particularly important for the stability of the gasification furnace. The industrial analysis index and the element analysis index can be used to ensure good technical and economic performance of the gasification, and the analysis and control of the ash chemical composition index can ensure normal slagging of the gasification furnace.

[0004] In the existing silo coal blending mode, the dry and powdery coal is controlled by the vibration feeder to discharge the amount, and the flow of the coal discharged from the silo is adjusted according to the required coal blending ratio and the actual reading of the electronic belt scale. Multiple coal is transported to the finished coal bin through the respective belt conveyors to complete the coal blending. In the related technology, since the coal quality requirement of the coal for gasification, the coal quality needs to be accurately controlled. For example, the patent CN112009998B discloses a coal blending device and system applied to industrial production. The invention only considers the ash content parameter of the coal quality, and the coal quality requirement of the coal blending is low. The coal quality index parameter of the blended coal is single, and cannot meet the demand of the coal for gasification. For another example, the patent CN108671848B discloses a coal blending automatic control system and a coal blending method. The data analysis of the coal sample in the coal blending process adopts the sampling inspection method. Although compared with the coal blending method provided by the patent CN112009998B, the coal quality index analysis can be realized, the sampling inspection analysis is a point to a surface evaluation of the coal quality, cannot real-time grasp the coal quality index, and cannot adjust the raw coal conveying amount in time according to the coal quality fluctuation, and is difficult to meet the coal quality demand of the coal for gasification. SUMMARY

[0005] In order to solve the problems existing in the prior art, the purpose of the present application is to provide a fine coal blending device for gasification, which can detect the coal quality data in real time during the coal blending process, adjust the blending ratio of each raw coal in real time, effectively grasp the accurate index of the coal quality, ensure that the coal quality data of the blended coal is more accurate and stable, and meet the coal quality demand of the coal for gasification.

[0006] The technical scheme of the present application is as follows:

[0007] The coal fine coal blending device for gasification comprises a stirring system and further comprises:

[0008] The raw coal accurate feeding system comprises a plurality of raw coal silos for storing different types of raw coal and a plurality of quantitative feeding assemblies corresponding to the plurality of raw coal silos, the quantitative feeding assemblies are arranged at discharge ports of the raw coal silos and are used for controlling the raw coal discharge flow of the raw coal silos;

[0009] The coal conveying system comprises a conveying belt and a leveling unit, the conveying belt is horizontally arranged between the quantitative feeding assemblies and the stirring system, and the leveling unit is arranged on the upper side of the conveying belt and is used for pushing and leveling the raw coal on the conveying belt;

[0010] The online detection system is arranged on the side of the leveling unit close to the stirring system and above the conveying belt, and is used for acquiring the coal quality data of the industrial composition, the element composition and the ash chemical composition of the raw coal discharged from each raw coal silo;

[0011] The central control system is electrically connected with the raw coal accurate feeding system and the online detection system respectively, is used for comparing the coal quality data acquired by the online detection system with a preset coal quality data range, and controls the raw coal discharge flow of each raw coal silo in the raw coal accurate feeding system.

[0012] Preferably, the quantitative feeding assembly comprises a vibrating screen feeder and a weighing module, the inlet of the vibrating screen feeder is communicated with the discharge port of the raw coal silo, the outlet is arranged above the conveying belt, the weighing module is arranged at the outlet of the vibrating screen feeder and is used for measuring the raw coal discharge amount of the vibrating screen feeder per unit time, and the vibrating screen feeder and the weighing module are electrically connected with the central control system, the central control system is used for adjusting the vibration frequency of the vibrating screen feeder through the measurement value fed back by the weighing module to realize the raw coal discharge flow control.

[0013] Preferably, the weighing module comprises a gravity sensor and a guide plate, the guide plate is arranged at the outlet of the vibrating screen feeder in an inclined manner, the upper end of the inclined direction of the guide plate is rotationally connected with the vibrating screen feeder, the lower end of the inclined direction of the guide plate abuts on the detection end of the gravity sensor, the gravity sensor is fixed with the vibrating screen feeder through a connecting plate, the gravity sensor is electrically connected with the central control system, and the gravity sensor can feed back the measured weight data to the central control system in real time to adjust the vibration frequency of the vibrating screen feeder.

[0014] Preferably, the flattening unit comprises a height limiting plate arranged along the width direction of the conveying belt, the height limiting plate has the same width as the conveying belt, both ends of the height limiting plate are fixed to the equipment rack, the bottom surface of the height limiting plate is parallel to the conveying belt, and the bottom of the height limiting plate is lower than the detection end of the online detection system; the height limiting plate can flatten the raw coal on the conveying belt before entering the area of the online detection system, so that the online detection system can more accurately collect the raw coal quality data, and the proportioning amount of each raw coal can be accurately adjusted, and finally the standard of gasification coal can be met.

[0015] Preferably, the flattening unit further comprises a coal turning assembly arranged on the side of the height limiting plate away from the online detection system, the coal turning assembly comprises a motor and a coal turning plate; the motor is arranged on one side of the width direction of the conveying belt and is fixed to the equipment rack; the coal turning plate is fixed to the output shaft of the motor, the length of the coal turning plate is the same as the width of the conveying belt, the lowest point of the turning motion of the coal turning plate is lower than the top of the height limiting plate, and the highest point of the turning motion of the coal turning plate is higher than the top of the height limiting plate; the coal turning assembly can further lower the height or preliminarily disperse the accumulated raw coal before the height limiting plate flattens the raw coal, so that the coal can be better flattened under the action of the height limiting plate, and the coal quality data detection of the online detection system is facilitated.

[0016] Preferably, the online detection system comprises a plurality of ray-type coal sample detectors arranged one-to-one corresponding to the plurality of raw coal silos, the plurality of ray-type coal sample detectors are fixed to the equipment rack through a mounting plate, and the plurality of ray-type coal sample detectors are arranged side by side along the width direction of the conveying belt, the ray-type coal sample detector has a detection port, the detection port is higher than the flattened coal sample, and the detection port is used to obtain the industrial composition, element composition and ash chemical composition of the raw coal output by the corresponding raw coal silo.

[0017] Preferably, the detection stroke of the ray-type coal sample detector on the conveying belt is 1m-2m, so that the content of the related coal quality index in each raw coal can be more accurately detected.

[0018] Preferably, the coal quality data detected by the ray-type coal sample detector comprises:

[0019] industrial composition, including moisture, ash, volatile matter, fixed carbon;

[0020] element composition, including carbon, hydrogen, nitrogen;

[0021] ash chemical composition, including SiO2, Al2O3, CaO, Fe2O3, MgO, K2O, Na2O, TiO2.

[0022] Compared with the prior art, the coal fine coal blending device for gasification has the following beneficial effects:

[0023] The device is provided with a raw coal accurate blending system, a coal conveying system, an online detection system, a central control system and a stirring system. In the coal blending process, the central control system collects coal quality data of industrial components, element components and ash chemical composition of the raw coal on the conveying belt in real time through the online detection system, and compares with the preset coal quality data range. After obtaining the comparison result, the central control system continuously obtains the real-time discharging weight of the quantitative feeding assembly by using the weighing module at the bottom of each raw material silo, and then adjusts the coal discharging flow of the corresponding quantitative feeding assembly, so as to realize real-time and accurate control of the blending amount of each raw coal, and ensure that the blended coal quality meets the working requirements of the gasifier. Thus, the technical problem that the working of the gasifier is unstable due to the uncertain blending components caused by the existing sampling detection and experience-based coal blending is solved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 It is a schematic diagram of the overall layout structure in the embodiment of the present application;

[0025] Fig. 2 It is a schematic diagram of the coal blending operation process in the embodiment of the present application;

[0026] Fig. 3 It is a structural schematic diagram of the coal turning assembly in the embodiment of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS: 1, raw coal accurate blending system; 2, coal conveying system; 3, online detection system; 4, stirring system; 5, central control system; 6, raw coal silo; 7, gravity sensor; 8, vibrating screen feeder; 9, support; 10, conveying belt; 11, coal turning assembly; 12, flattening unit; 13, ray type coal sample detector. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and do not limit the present application.

[0029] Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0030] In addition, the technical schemes of each embodiment of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical schemes appears contradictory or unachievable, it should be considered that the combination of technical schemes does not exist, and is not within the scope of protection required by the present application.

[0031] Referring to Figs. 1 to 3 As shown, in order to be able to detect coal quality data in real time during coal blending, adjust the blending amount of each raw coal in real time, effectively grasp the accurate index of coal quality, and ensure that the coal quality data of the completed configuration is more accurate and stable, and meet the coal quality requirements of gasification coal. The embodiment provides a fine coal blending device for gasification coal, which comprises an equipment rack, a stirring system 4, a raw coal accurate feeding system 1, a coal conveying system 2, an online detection system 3 and a central control system 5 are arranged on the equipment rack. The raw coal accurate feeding system 1, the coal conveying system 2, the online detection system 3 and the stirring system 4 are connected in sequence, and the raw coal accurate feeding system 1, the coal conveying system 2, the online detection system 3 and the stirring system 4 are electrically connected with the central control system 5 respectively, and the operation control between the components is realized through the central control system 5. Specifically as follows:

[0032] The raw coal accurate feeding system 1 comprises a plurality of raw coal silos 6 for storing different types of raw coal and a quantitative feeding assembly corresponding to each raw coal silo 6. The raw coal silo 6 is fixedly installed on the equipment rack and is used to store raw coal materials in a dry powder state. The quantitative feeding assembly is arranged at the discharge port of the raw coal silo 6 and is used to control the coal flow of the raw coal silo 6. The quantitative feeding assembly comprises a weighing module and a vibrating screen feeder 8. The weighing module is arranged at the discharge port of the vibrating screen feeder 8. The vibrating screen feeder 8 can quickly adjust the coal flow of the raw material silo, and the weighing module can feed the real-time coal weight of the vibrating screen feeder 8 to the central control system 5 in real time.

[0033] The coal conveying system 2 comprises a belt conveyor and a flattening unit 12. The belt conveyor is composed of a conveying belt 10 and a driving part. The conveying belt 10 is horizontally arranged between the quantitative feeding assembly and the stirring system 4 through a support 9. The conveying belt 10 is driven to operate by the driving part. Preferably, a plurality of raw material silos are arranged along the width direction of the conveying belt 10. The flattening unit 12 is arranged on the upper side of the conveying belt 10. The flattening unit 12 is used to comb and flatten the raw coal on the conveying belt 10 to ensure that the online detection system 3 can accurately detect and analyze the coal quality data.

[0034] The online detection system 3 is arranged on the side of the flattening unit 12 close to the stirring system 4 and above the conveying belt 10, and comprises a plurality of detection ports corresponding to the raw coal silos 6 one by one, each detection port being used to acquire the coal quality data of industrial components, element components and ash chemical composition of the raw coal output by the corresponding raw coal silo 6; wherein the industrial components include moisture, ash, volatile matter and fixed carbon; the element components include carbon, hydrogen and nitrogen; and the ash chemical composition includes SiO2, Al2O3, CaO, Fe2O3, MgO, K2O, Na2O and TiO2. The central control system 5 is electrically connected with the raw coal accurate feeding system 1 and the online detection system 3 respectively, and is used to compare the coal quality data acquired by the online detection system 3 with the preset coal quality data range, so as to control the coal flow of each raw coal silo 6 in the raw coal accurate feeding system 1.

[0035] The stirring system 4 is arranged on the side of the end of the conveying belt 10, and the stirring system 4 adopts a continuous stirring main machine device, and the prepared raw coal enters the continuous stirring main machine device from the feeding port, so that the coal is uniformly mixed and is convenient for subsequent use of coal for gasification.

[0036] Referring to Fig. 1 The inlet of the vibrating screen feeder 8 is in communication with the discharge port of the raw coal silo 6, and the outlet of the vibrating screen feeder 8 is arranged above the conveying belt 10, and the vibrating screen feeder 8 is electrically connected with the central control system 5, and the central control system 5 is used to compare the coal quality data acquired by the online detection system 3 in real time with the preset target coal quality data, so as to realize real-time adjustment of the vibration frequency of the vibrating screen feeder 8, so as to control the coal amount of the vibrating screen feeder 8 conveyed to the conveying belt 10 in real time.

[0037] Referring to Fig. 1As shown, further, in order to improve the accuracy of coal blending. The weighing module includes a guide plate and a gravity sensor 7, the guide plate is inclinedly arranged at the outlet of the vibrating screen feeder 8, and the upper end of the inclined direction of the guide plate is rotationally connected with the vibrating screen feeder 8, the lower end of the inclined direction abuts on the detection end of the gravity sensor 7, and the gravity sensor 7 is fixed with the vibrating screen feeder 8 through the connecting plate, so that when the vibrating screen feeder 8 discharges, the coal flows to the conveying belt 10 through the guide plate, at this time, the pressure change provided by the guide plate to the gravity sensor 7 can be used to measure the coal discharge amount of the vibrating screen feeder 8 in unit time. Generally, the measurement unit time of the gravity sensor 7 is generally set to 1 second, that is, the gravity sensor 7 can measure the weight of the vibrating screen feeder 8 discharged per second, which can effectively improve the configuration accuracy. Further, the gravity sensor 7 and the central control system 5 are electrically connected, for real-time feedback of the measured weight data to the central control system 5, so that the central control system 5 adjusts the vibration frequency of the vibrating screen feeder 8 by cooperating with the coal quality data detected by the online detection system 3, thereby achieving real-time control of the accurate blending amount of each raw coal. Preferably, the gravity sensor can also be replaced by a pressure sensor or other weighing sensor.

[0038] Referring to Fig. 3 As shown, further, in order to improve the accuracy of coal blending. The leveling unit 12 includes a height limiting plate, the height limiting plate is arranged along the width direction of the conveying belt 10, and the width of the height limiting plate is the same as the width of the conveying belt 10, both ends of the height limiting plate are fixed with the equipment rack, the bottom surface of the height limiting plate is parallel to the conveying belt 10, and the bottom of the height limiting plate is lower than the detection end of the online detection system. The height limiting plate can realize leveling treatment of the raw coal on the conveying belt 10 before entering the area of the online detection system 3, so that the online detection system 3 can more accurately acquire the collection of raw coal quality data, which is convenient for accurately adjusting the blending amount of each raw coal, and finally meets the standard of gasification coal.

[0039] Referring to Fig. 3As shown, further, in order to improve the accuracy of coal blending. The leveling unit 12 also includes a coal turning assembly 11, which is arranged on the side of the height limiting plate away from the online monitoring system 3. The coal turning assembly 11 includes a motor and a coal turning plate. The motor is arranged on one side of the width direction of the conveying belt 10 and is fixed to the equipment rack. The coal turning plate is fixed to the output shaft of the motor. The length of the coal turning plate is the same as the width of the conveying belt 10. The lowest point of the turning motion of the coal turning plate is lower than the top of the height limiting plate. The highest point of the turning motion of the coal turning plate is higher than the top of the height limiting plate. Since the raw coal may accumulate when falling from the discharge port of the vibrating screen feeder 8 onto the conveying belt 10, in order to avoid the accumulated raw coal from jumping over the top of the height limiting plate to the side of the online monitoring system 3 during the leveling process, thereby affecting the accuracy of the detection of the online monitoring system 3, the coal turning assembly 11 is arranged in combination with the height limiting plate, so that the coal turning assembly 11 can further lower the height or preliminarily disperse the accumulated raw coal before the leveling of the height limiting plate, so that the raw coal can be better leveled under the action of the height limiting plate, facilitating the detection of the coal quality data of the online monitoring system 3.

[0040] Referring to Fig. 1 As shown, further, in order to improve the accuracy of coal blending. The online monitoring system 3 includes a plurality of ray-type coal sample detectors 13 corresponding to the plurality of raw coal silos 6. The plurality of ray-type coal sample detectors 13 are fixed through a mounting plate and an equipment rack. The mounting plate is located on the upper side of the conveying belt 10. The plurality of ray-type coal sample detectors 13 are fixed on the side of the mounting plate facing the conveying belt 10. The ray-type coal sample detector 13 has a detection port, which is higher than the leveled coal sample. The detection port is used to obtain the coal quality data of the industrial composition, elemental composition, and ash chemical composition of the raw coal output by the corresponding raw coal silo 6. The detection value of the ray-type coal sample detector 13 is the average value of the surface coal sample value when in use. When the transmission system switches coal, the ray-type coal sample detector 13 needs to stop running before stable transmission of coal quality. In order to improve the detection accuracy of the coal quality data, the detection stroke of the ray-type coal sample detector 13 on the conveying belt 10 is 1m-2m.

[0041] The online detection system 3 and the raw coal accurate feeding system 1 are electrically connected with the central control system 5. The central control system 5 is a computer integrating data storage, calculation, condition judgment and instruction sending. Before coal blending, the coal blending scheme is inputted into the central control system 5 according to the coal quality and required coal quality indexes, and then the corresponding preset of each index is calculated to carry out coal blending. The specific control steps are as follows: ①obtain the industrial analysis (moisture, ash, volatile matter and fixed carbon), element analysis (carbon, hydrogen and nitrogen) and ash chemical composition (SiO2, Al2O3, CaO, Fe2O3, MgO, K2O, Na2O and TiO2) data through the online detection system 3, obtain the coal output data from the gravity sensor 7, and calculate the coal quality range of the preset coal blending according to the coal output and coal quality data; ②if the range exceeds, the central control system 5 sends an instruction to the raw coal accurate feeding system 1 according to the vibration frequency and raw coal output calibration data of the vibrating screen feeder 8, increases or reduces the vibration frequency of the vibrating screen feeder 8 to control the coal output per second; repeat the processes of ① and ② to make the coal quality reach the preset coal quality range. When the coal material changes, the central control system 5 needs to modify the input of each index according to the new coal blending scheme.

[0042] In order to improve the coal quality precision of coal blending to meet the demand of gasification coal, the conveying belt 10 can be further set as multiple, each conveying belt 10 corresponds to one raw material silo for transporting one kind of raw material, and then the flattening unit 12, the coal turning assembly 11 and the online detection system 3 are respectively arranged on each conveying belt 10. Thus, the contact and mixing of adjacent raw coals in the detection process can be avoided, and the accuracy of the coal quality detection of the online detection system 3 is improved.

[0043] The working principle of the device: the required raw coal powder is placed in the raw coal silo 6 respectively, and the flow of each raw material silo is adjusted to the conveying belt 10 through the vibrating screen feeder 8, and the discharge flow is measured in real time by the gravity sensor 7 and transmitted to the central control system 5. Further, different raw coal powders are driven by the conveying belt 10 to pass through the coal turning assembly 11, the leveling unit 12 and the online detection system 3, and the online detection system 3 mainly detects the industrial components (moisture, ash, volatile matter, fixed carbon), element components (carbon, hydrogen, nitrogen) and ash chemical composition (SiO2, Al2O3, CaO, Fe2O3, MgO, K2O, Na2O, TiO2) of each raw coal powder after blending, and transmits the detected data to the central control system 5. By comparing with the preset target coal quality index range, the central control system 5 feeds back the comparison result to the raw coal accurate blending system 1, and uses the feedback data and the gravity sensor 7 to control the vibration frequency of the vibrating screen feeder 8 on each raw coal silo 6. The vibration frequency of the vibrating screen feeder 8 can control the coal output per unit time of the raw coal powder to the conveying belt 10, so as to accurately control the required coal quality index and meet the demand of gasification coal. The raw coal powder passing through the online detection system 3 is sent to the stirring device by the conveying belt 10 and is mixed uniformly.

[0044] In summary, the device can also quickly and accurately mix several coal products, so that high-quality coal can be fully gasified, the gasification efficiency of coal blending can be improved, the waste of high-quality coal in the coal blending process can be reduced, and the device has good social benefits and the like.

[0045] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A coal fine coal blending device for gasification, comprising a stirring system (4), characterized in that, Also include: The raw coal accurate feeding system (1) includes a plurality of raw coal silos (6) for storing different types of raw coal and a quantitative feeding assembly corresponding to each raw coal silo (6), which is arranged at the discharge port of the raw coal silo (6) and used to control the coal flow of the raw coal silo (6); The coal conveying system (2) includes a conveying belt (10) and a leveling unit (12), the conveying belt (10) is horizontally arranged between the quantitative feeding assembly and the stirring system (4), and the leveling unit (12) is arranged on the upper side of the conveying belt (10), which is used to push and level the raw coal on the conveying belt (10); The online detection system (3) is arranged on the side of the leveling unit (12) close to the stirring system (4) and above the conveying belt (10), which is used to obtain the coal quality data of the industrial composition, element composition and ash chemical composition of the raw coal output by each raw coal silo (6); The central control system (5) is electrically connected with the raw coal accurate feeding system (1) and the online detection system (3) respectively, and is used to compare the coal quality data obtained by the online detection system (3) with the preset coal quality data range, so as to control the coal flow of each raw coal silo (6) in the raw coal accurate feeding system (1); The leveling unit (12) includes a height limiting plate, which is arranged along the width direction of the conveying belt (10), and the width of the height limiting plate is the same as that of the conveying belt (10), the bottom surface of the height limiting plate is parallel to the conveying belt (10), and the bottom of the height limiting plate is lower than the detection end of the online detection system (3); The leveling unit (12) further includes a coal turning assembly (11), which is arranged on the side of the height limiting plate away from the online detection system (3), and the coal turning assembly (11) includes a motor arranged on one side of the width direction of the conveying belt (10); A coal turning plate is fixedly connected to the output shaft of the motor, the length of the coal turning plate is the same as the width of the conveying belt (10), the lowest point of the turning motion of the coal turning plate is lower than the top of the height limiting plate, and the highest point of the turning motion of the coal turning plate is higher than the top of the height limiting plate; The online detection system (3) includes a plurality of ray type coal sample detectors (13) corresponding to the plurality of raw coal silos (6), which are arranged side by side along the width direction of the conveying belt (10), the ray type coal sample detector (13) has a detection port, and the detection port is higher than the leveled coal sample, and the detection port is used to obtain the coal quality data of the industrial composition, element composition and ash chemical composition of the raw coal output by the corresponding raw coal silo (6).

2. The coal fine coal blending device for gasification according to claim 1, characterized by The quantitative feeding assembly comprises a vibrating screen feeder (8) and a weighing module, the inlet of the vibrating screen feeder (8) is communicated with the discharge port of the raw coal silo (6), the outlet is arranged above the conveying belt (10), the weighing module is arranged at the outlet of the vibrating screen feeder (8) and is used for measuring the coal output of the vibrating screen feeder (8) per unit time, the vibrating screen feeder (8) and the weighing module are electrically connected with the central control system (5), and the central control system (5) is used for adjusting the vibration frequency of the vibrating screen feeder (8) according to the measurement value fed back by the weighing module, so that the coal output flow control is realized.

3. The coal fine coal blending device for gasification according to claim 2, characterized by The weighing module comprises a gravity sensor (7) and a guide plate, the guide plate is arranged at the outlet of the vibrating screen feeder (8) in an inclined mode, the upper end of the inclined direction of the guide plate is rotationally connected with the vibrating screen feeder (8), the lower end of the inclined direction abuts on the detection end of the gravity sensor (7), the gravity sensor (7) is fixed with the vibrating screen feeder (8) through a connecting plate, and the gravity sensor (7) is electrically connected with the central control system (5).

4. The coal fine coal blending device for gasification according to claim 1, characterized by The detection stroke of the ray type coal sample detector (13) on the conveying belt (10) is 1m-2m.

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