Test equipment for pulverizing system of pulverized coal fired boiler

Abstract

The utility model discloses test equipment for a pulverizing system of a pulverized coal fired boiler. The test equipment comprises a boiler body, a discharging pipe, an air entraining fan, a heater, an electric control valve, a dust exhaust hood, a filtering and separating device, a detector, a powder outlet pipe and a discharging electric valve, according to the utility model, the filtering and separating device is arranged, and the air entraining fan is started to actuate airflow to blow out pulverized coal in the furnace body, so that the furnace body can float into the dust exhaust hood, dust in the pulverized coal is filtered by the dust exhaust hood, and the pulverized coal floating into the filtering and separating device and the pulverized coal are respectively guided into the detector under the guidance of the powder guide pipe; the detector can synchronously identify and detect pulverized coal particles with different sizes, so that the effect of filtering and separating the pulverized coal flying out of the dust exhaust hood through the filtering and separating device is achieved, the filtered and separated pulverized coal can be more easily detected by the detector, and the detection efficiency is improved. Therefore, the problem of floating of data results after testing due to different sizes of dust particles generated when pulverized coal floats into the lower part of the detection and measurement equipment in the original equipment is solved.

Description

Technical Field

[0001] The utility model relates to the relevant field of pulverized coal boilers, in particular to a pulverized coal boiler pulverizing system testing equipment. Background Art

[0002] A boiler is an energy conversion device that converts the thermal energy generated by coal into steam kinetic energy. It is also an important production equipment for power generation companies. Whether it can operate stably and efficiently will directly affect the safety and economy of coal-fired power plants.

[0003] A Chinese patent document with publication number CN211292026U discloses a pulverized coal boiler pulverizing system test device, which can be used as a test system for a primary air measurement method; the pulverized coal boiler pulverizing system test device provided by the device has the advantages of small footprint, low energy consumption, high similarity with the actual pulverized coal boiler pulverizing system, and reduced test and research costs.

[0004] During the use of the original equipment, the coal powder particles were detected by wind measurement method. Although the measurement efficiency was improved, the lack of a device to subdivide the coal powder during measurement resulted in the coal powder floating in the dust particles under the detection and measurement equipment of different sizes, causing the data results after the test to fluctuate, which in turn required modifications. Utility Model Content

[0005] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a test device for a pulverized coal boiler pulverizing system.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a test device for a pulverized coal boiler pulverizing system, comprising a furnace body, a discharge pipe, an induced air fan, a heater, an electric control valve, a dust hood, a filtering device, a detector, a powder outlet pipe, and a feeding electric valve, wherein a discharge pipe is installed on the top of the furnace body, the induced air fan is fixed to the left end of the furnace body, the heater is fixed to the left end of the furnace body, the electric control valve is fixed to the bottom of the dust hood, the dust hood is connected to the top of the furnace body, the filtering device is fixed to the right end of the dust hood, the detector is installed below the filtering device, and the detector is connected to the dust hood The right end of the powder outlet pipe is arranged at the bottom of the furnace body, and the unloading electric valve is installed inside the powder outlet pipe. The filtering device includes a shell, a powder guide pipe, an air guide hood, a movable bracket, a fine mesh, a mounting frame, and a transmission. The shell is fixed to the right end of the dust exhaust hood, a powder guide pipe is arranged at the bottom of the shell, the air guide hood is fixed to the left end of the shell, the movable bracket is fixed to the inside of the shell, the fine mesh is installed inside the mounting frame, the mounting frame is rotatably matched with the bottom of the movable bracket, the transmission is transmission-connected to the top of the movable bracket, and the transmission is fixed to the inner top of the shell.

[0007] As a further solution of the present utility model, the transmission includes a body, a servo motor, a transmission lead screw, a limiting guide rail, and a transmission block. The body is fixed to the inner top end of the housing. A servo motor is installed at the right end of the body. The servo motor is drivingly connected to the right end of the transmission lead screw by a coupling. The transmission lead screw is rotatably connected to the inside of the body. The transmission lead screw is in threaded transmission with the inside of the transmission block. The limiting guide rail is arranged at the inner top end of the body. The transmission block is slidably connected to the bottom of the limiting guide rail. The transmission block is drivingly connected to the top of the mounting frame.

[0008] As a further solution of the present utility model, the powder guide pipes are all horizontally arranged at the bottom of the housing.

[0009] As a further solution of the present utility model, the fine mesh and the mounting frame are vertically arranged at the top of the movable bracket.

[0010] As a further solution of the present utility model, the inner size of the mounting frame is the same as the size of the fine mesh.

[0011] As a further solution of the present utility model, there are three groups of the fine meshes. The fine filter holes of the three groups of fine meshes can filter three kinds of coal dust particles.

[0012] As a further solution of the present utility model, the servo motor and the transmission lead screw are horizontally arranged.

[0013] As a further solution of the present utility model, a one-way transmission thread is arranged on the outer side of the transmission lead screw to ensure that the transmission lead screw can be in meshing transmission with the inside of the transmission block.

[0014] As a further solution of the present utility model, the heater belongs to an industrial heater of the KW model in existing industrial products.

[0015] As a further solution of the present utility model, the limiting guide rail and the transmission lead screw are arranged parallel to each other.

[0016] Compared with the prior art, the present utility model provides a test device for a pulverized coal boiler coal pulverizing system, which has the following beneficial effects:

[0017] 1. In the present utility model, a filtering device is provided. By starting the air-introducing fan to drive the air flow to blow out the pulverized coal inside the furnace body, the pulverized coal in the furnace body can float into the dust exhaust hood. Further, by starting the driver to drive the mounting frame to move, the mounting frame can drive the fine division net, and with the auxiliary cooperation of the movable support, the mounting frame is pushed to shake. Then, by shaking the mounting frame itself, the dust staying above each group of fine division nets floats into the inside of the powder guide pipe. Under the guidance of the powder guide pipe, the pulverized coal is respectively introduced into the inside of the detector, ensuring that the detector can synchronously identify and detect pulverized coal particles of different sizes. Thus, the filtering device plays a filtering role in the pulverized coal floating out of the dust exhaust hood, making the filtered pulverized coal easier to be detected by the detector, and further solving the problem that the sizes of the dust particles where the pulverized coal floats under the detection and measurement equipment in the original equipment are inconsistent, resulting in fluctuations in the test data results.

[0018] 2. In the present utility model, a driver is provided at the upper end of the filtering device. By setting the air guide hood to guide the pulverized coal carried by the air flow to float into the inside of the housing, starting the servo motor to drive the transmission lead screw to rotate, the transmission lead screw and the transmission block are in threaded transmission, prompting the transmission block to drive the mounting frame to shake left and right, so that the fine division net inside the mounting frame can shake off the dust staying on the fine division net. Then, by starting the driver to drive the mounting frame to move, the mounting frame can drive the fine division net, and with the auxiliary cooperation of the movable support, the mounting frame is pushed to shake. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 is the planar structural schematic diagram of the present utility model;

[0021] Figure 3 is the three-dimensional structural schematic diagram of the filtering device of the present utility model;

[0022] Figure 4 is the internal structural schematic diagram of the filtering device of the present utility model;

[0023] Figure 5 is the planar structural schematic diagram of the driver of the present utility model.

[0024] Wherein: furnace body - 1, feeding pipe - 2, air-introducing fan - 3, heater - 4, electric control valve - 5, dust exhaust hood - 6, filtering device - 7, detector - 8, powder outlet pipe - 9, feeding electric valve - 10, housing - 71, powder guide pipe - 72, air guide hood - 73, movable support - 74, fine division net - 75, mounting frame - 76, driver - 77, body of the device - 771, servo motor - 772, transmission lead screw - 773, limiting guide rail - 774, transmission block - 775. DETAILED DESCRIPTION OF THE INVENTION

[0025] To further explain the technical solution of the present utility model, it will be elaborated in detail through specific embodiments below.

[0026] Please refer to Figure 1 - Figure 2 , in the embodiment of the present utility model:

[0027] A test device for a pulverized coal boiler coal pulverizing system includes a furnace body 1, a feeding pipe 2, an induced draft fan 3, a heater 4, an electric control valve 5, a dust exhaust hood 6, a filtering and separating device 7, a detector 8, a powder outlet pipe 9, and a blanking electric valve 10. The feeding pipe 2 is installed at the top of the furnace body 1. The induced draft fan 3 is fixed to the left end of the furnace body 1. The heater 4 is fixed to the left end of the furnace body 1. The electric control valve 5 is fixed to the bottom of the dust exhaust hood 6. The dust exhaust hood 6 is communicated with the top of the furnace body 1. The filtering and separating device 7 is fixed to the right end of the dust exhaust hood 6. The detector 8 is installed below the filtering and separating device 7. The detector 8 is connected to the right end of the dust exhaust hood 6. The powder outlet pipe 9 is arranged at the bottom of the furnace body 1. The blanking electric valve 10 is installed inside the powder outlet pipe 9.

[0028] Please refer to 3 - Figure 4 , in the embodiment of the present utility model:

[0029] The filtering and separating device 7 includes a housing 71, a powder guiding pipe 72, an air guiding hood 73, a movable support 74, a fine filtering net 75, a mounting frame 76, and a transmission device 77. The housing 71 is fixed to the right end of the dust exhaust hood 6. The powder guiding pipe 72 is arranged at the bottom of the housing 71. The air guiding hood 73 is fixed to the left end of the housing 71. The movable support 74 is fixed inside the housing 71. The fine filtering net 75 is installed inside the mounting frame 76. The mounting frame 76 is rotatably matched with the bottom of the movable support 74. The transmission device 77 is in transmission connection with the top of the movable support 74. The transmission device 77 is fixed to the inner top of the housing 71. The powder guiding pipes 72 are all arranged horizontally at the bottom of the housing 71. The fine filtering net 75 and the mounting frame 76 are arranged vertically at the top of the movable support 74. The inner size of the mounting frame 76 is the same as the size of the fine filtering net 75. There are three groups of fine filtering nets 75, and the fine filter holes of the three groups of fine filtering nets 75 can filter three kinds of coal dust particles.

[0030] Please refer to 5, in the embodiment of the present utility model:

[0031] The actuator 77 includes a body 771, a servo motor 772, a transmission lead screw 773, a limiting guide rail 774, and a transmission block 775. The body 771 is fixed to the inner top end of the housing 71. A servo motor 772 is installed at the right end of the body 771. The servo motor 772 is drivingly connected to the right end of the transmission lead screw 773 by a coupling. The transmission lead screw 773 is rotatably connected to the inside of the body 771. The transmission lead screw 773 is in threaded transmission with the inside of the transmission block 775. The limiting guide rail 774 is arranged at the inner top end of the body 771. The transmission block 775 is slidably connected to the bottom of the limiting guide rail 774. The transmission block 775 is drivingly connected to the top of the mounting frame 76. The servo motor 772 and the transmission lead screw 773 are arranged at the same horizontal level. A one-way transmission thread is provided on the outer side of the transmission lead screw 773 to ensure that the transmission lead screw 773 can be in meshing transmission with the inside of the transmission block 775. The limiting guide rail 774 and the transmission lead screw 773 are arranged parallel to each other.

[0032] Reference Figure 1 - Figure 5 , during use, place the furnace body 1 horizontally on the ground so that the equipment is supported. Then put the mineral raw materials and the reaction liquid into the inside of the furnace body 1 from the feeding pipe 2. Start the heater 4 to generate heat, which plays a role in heating the raw materials inside the furnace body 1 to ensure that the mineral raw materials can be smelted. Start the feeding electric valve 10 to drive the mixing shaft arranged below the feeding electric valve 10 to rotate, so that the mixing shaft arranged below the feeding electric valve 10 can stir the mineral raw materials to quickly smelt and generate pulverized coal;

[0033] Start the air extraction fan 3 to draw the pulverized coal inside the furnace body 1 out, so that the pulverized coal in the furnace body 1 can float into the dust removal hood 6. Then the dust in the pulverized coal is filtered by the dust removal hood 6 to ensure that the pulverized coal floating into the filtering device 7 has a high purity;

[0034] At the same time, the pulverized coal carried by the airflow is guided into the inside of the housing 71 through the air guide hood 73. Start the servo motor 772 to drive the transmission lead screw 773 to rotate. The transmission lead screw 773 is in threaded transmission with the transmission block 775, prompting the transmission block 775 to drive the mounting frame 76 to shake left and right, so that the fine mesh 75 inside the mounting frame 76 can shake off the dust staying on the fine mesh 75. Furthermore, start the actuator 77 to drive the mounting frame 76 to move, so that the mounting frame 76 can drive the fine mesh 75 and, with the auxiliary cooperation of the movable support 74, push the mounting frame 76 to shake;

[0035] By shaking straight through the installation frame 76, the dust remaining above each group of sub-mesh 75 is floated into the interior of the powder guide pipe 72. Under the guidance of the powder guide pipe 72, the pulverized coal is respectively introduced into the interior of the detector 8, ensuring that the detector 8 can synchronously identify and detect pulverized coal particles of different sizes. Furthermore, it achieves the filtering effect on the pulverized coal floating out from the dust exhaust hood 6 through the filtering device 7, making the filtered pulverized coal easier to be detected by the detector 8, thereby solving the problem that the sizes of the dust particles where the pulverized coal floats into the lower part of the detection and measurement equipment in the original equipment are inconsistent, resulting in fluctuations in the data results after testing;

[0036] After being filtered by the filtering device 7, the detector 8 can accurately detect the pulverized coal contained in the air flow at the same time period. Next, when the feeding electric valve 10 is started, all the pulverized coal flows out from the powder outlet pipe 9 provided at the bottom of the furnace body 1.

[0037] The control mode of the present invention is controlled by manually starting and closing the switch. The wiring diagram of the power element and the power supply are common knowledge in the art, and the present invention mainly protects mechanical devices, so the control mode and wiring layout of the present invention will not be explained in detail.

[0038] The control mode of the present invention is automatically controlled by a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art, and the power supply is also common knowledge in the art. Moreover, the present invention mainly protects mechanical devices, so the control mode and circuit connection of the present invention will not be explained in detail.

[0039] The above are only the preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A test device for a pulverized coal boiler pulverizing system, comprising a furnace body (1), a discharge pipe (2), an induced air fan (3), a heater (4), an electric control valve (5), a dust exhaust hood (6), a filtering device (7), a detector (8), a powder discharge pipe (9), and a discharge electric valve (10), wherein a discharge pipe (2) is installed on the top of the furnace body (1), and the induced air fan (3) is fixed to the left end of the furnace body (1); Features: The filtering device (7) comprises a shell (71), a powder guide tube (72), an air guide cover (73), a movable bracket (74), a fine-dividing net (75), a mounting frame (76), and a transmission (77); the shell (71) is fixed to the right end of the dust exhaust cover (6); a powder guide tube (72) is provided at the bottom of the shell (71); the air guide cover (73) is fixed to the left end of the shell (71); the movable bracket (74) is fixed to the inside of the shell (71); the fine-dividing net (75) is installed in the inside of the mounting frame (76); the mounting frame (76) is rotatably matched with the bottom of the movable bracket (74); the transmission (77) is transmission-connected to the top of the movable bracket (74); and the transmission (77) is fixed to the top of the inside of the shell (71).

2. According to claim 1, a pulverized coal boiler pulverizing system test equipment is characterized by: The transmission device (77) comprises a device body (771), a servo motor (772), a transmission screw (773), a limiting guide rail (774), and a transmission block (775). The device body (771) is fixed to the inner top of the housing (71). The servo motor (772) is installed at the right end of the device body (771). The servo motor (772) is connected to the right end of the transmission screw (773) by a coupling. The transmission screw (773) is connected to the inner part of the device body (771) by rotation. The transmission screw (773) is connected to the inner thread of the transmission block (775). The limiting guide rail (774) is arranged at the inner top of the device body (771). The transmission block (775) is connected to the bottom of the limiting guide rail (774) in a sliding manner. The transmission block (775) is connected to the top of the mounting frame (76) by transmission.

3. According to claim 1, a pulverized coal boiler pulverizing system test equipment is characterized by: The powder guide tubes (72) are all arranged at the same level at the bottom of the housing (71).

4. The pulverized coal boiler pulverizing system test equipment according to claim 1, characterized in that: The subdividing net (75) and the mounting frame (76) are vertically arranged on the top of the movable bracket (74).

5. The pulverized coal boiler pulverizing system test equipment according to claim 1, characterized in that: The inner size of the installation frame (76) is consistent with the size of the subdividing net (75).

6. The pulverized coal boiler pulverizing system test equipment according to claim 1, characterized in that: The subdividing nets (75) are provided in three groups, and the fine filter holes of the three groups of subdividing nets (75) can filter three types of coal dust particles.

7. The pulverized coal boiler pulverizing system test equipment according to claim 2, characterized in that: The servo motor (772) and the transmission screw rod (773) are arranged at the same level.

8. The pulverized coal boiler pulverizing system test equipment according to claim 2, characterized in that: The outer side of the transmission screw rod (773) is provided with a unidirectional transmission thread.

9. The pulverized coal boiler pulverizing system test equipment according to claim 1, characterized in that: The heater (4) is fixed to the left end of the furnace body (1), the electric control valve (5) is fixed to the bottom of the dust hood (6), the dust hood (6) is connected to the top of the furnace body (1), the filtering device (7) is fixed to the right end of the dust hood (6), the detector (8) is installed below the filtering device (7), the detector (8) is connected to the right end of the dust hood (6), the powder outlet pipe (9) is arranged at the bottom of the furnace body (1), and the unloading electric valve (10) is installed inside the powder outlet pipe (9).

10. The pulverized coal boiler pulverizing system test equipment according to claim 2, characterized in that: The limiting guide rail (774) and the transmission screw rod (773) are arranged parallel to each other.

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