Device and method for synchronously increasing air temperature and water temperature of boiler coal mill

Abstract

The invention relates to the technical field of coal-fired boiler body equipment, in particular to a device and method for synchronously increasing the air temperature and the water temperature of a boiler coal mill, and the device comprises a base, a first heating structure, a second heating structure, an adjusting structure, a crushing structure, an overhauling structure, a coal mill body, a discharging pipe, a powder pipe, a fixing pipe and a conveying pipe; by arranging the first heating structure and the second heating structure, the primary air temperature of an outlet of the coal mill body and the feed water temperature of the boiler body can be synchronously increased, better conditions are created for pulverized coal combustion, pulverized coal combustion is more sufficient, and therefore the combustion efficiency of the boiler body is improved; meanwhile, the amount of fuel needed for heating the feed water to steam can be reduced by increasing the temperature of the feed water, materials entering the coal mill body can be preliminarily crushed conveniently through the arrangement of the crushing structure, and the situation that the normal operation and the service life of the coal mill body are affected due to the fact that the material lumpiness is too large and energy consumption and abrasion are increased is avoided; and the maintenance structure is arranged, so that the internal maintenance efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coal-fired boiler main body equipment, and in particular to a device and method for synchronously improving the air temperature and water temperature of a boiler coal mill. Background Art

[0002] In the operation of coal-fired boilers, the primary air temperature and feed water temperature at the pulverizer outlet are key factors affecting its performance. The main function of the primary air at the pulverizer outlet is to dry and transport coal powder, and its temperature must be within an appropriate range. Too high or too low will affect the drying degree and transportation effect of the coal powder, thereby affecting the combustion efficiency. At the same time, the feed water temperature is directly related to the thermal efficiency of the boiler. Increasing the feed water temperature can reduce fuel consumption, because the feed water needs to absorb a lot of heat in the process of being heated into steam. Increasing the feed water temperature can reduce the amount of fuel required for the process and improve the steam generation efficiency.

[0003] However, when it is necessary to adjust the primary air temperature and the feed water temperature, only the primary air temperature or the feed water temperature at the coal mill outlet can be adjusted separately, and it is difficult to achieve synchronous and efficient improvement of the two. Moreover, there is a problem of insufficient energy utilization in the adjustment process. In the process of increasing the temperature, part of the energy cannot be effectively utilized, resulting in energy waste; at the same time, if the block size of the material entering the coal mill is too large, it will increase the energy consumption and wear of the coal mill, affecting the normal operation and service life of the coal mill; and the coal mill inspection plate is usually tightly installed on the coal mill by multiple bolts. When the inside of the coal mill needs to be inspected, the maintenance personnel need to spend a lot of time to disassemble the numerous bolts one by one. After the inspection is completed, the bolts need to be installed and tightened one by one. The operation is cumbersome, time-consuming and labor-intensive, affecting the inspection efficiency. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a device and method for synchronously increasing the air temperature and water temperature of a boiler coal mill.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a device and method for synchronously improving the air temperature and water temperature of a boiler coal mill, comprising a base, two coal mill bodies installed on the base, a first heating structure installed between the base and the coal mill body, a second heating structure installed between the base and the first heating structure, an adjustment structure installed on the base, a crushing structure installed on the adjustment structure, an inspection structure provided on the coal mill body, four powder pipes installed on the coal mill body, fixed pipes installed on the eight powder pipes, a conveying pipe fixedly connected to the fixed pipe, and a discharge pipe installed on the coal mill body;

[0006] The first heating structure comprises a boiler body installed on the base and a first pipe installed on the boiler body, the delivery pipe is connected to the burner interface of the boiler body, a sleeve heat exchanger is installed on the powder pipe, a spiral blade is fixedly connected between the powder pipe and the sleeve heat exchanger, the inlet and outlet of the sleeve heat exchanger are both installed with a sixth pipe, a regulating valve is installed between every four sixth pipes, a fifth pipe is installed on the regulating valve, a first isolation valve is installed on the fifth pipe, a fourth pipe is installed between two of the first isolation valves, a third pipe is fixedly connected to the fourth pipe above, a pressure reducing valve is installed on the third pipe, and a second pipe is installed between the pressure reducing valve and the first pipe;

[0007] The second heating structure includes a steam turbine installed on the base and an eighth pipeline installed on the steam turbine, the other end of the first pipeline is installed on the steam turbine, a high-pressure heater is installed on the base, a second isolation valve is installed on the eighth pipeline, a ninth pipeline is installed between the second isolation valve and the high-pressure heater, a seventh pipeline is fixedly connected between the high-pressure heater and the fourth pipeline below, and a tenth pipeline is installed between the high-pressure heater and the water pump inlet of the boiler body.

[0008] Specifically, the adjustment structure includes a guide frame installed on the base and an adjustment plate slidably connected to the guide frame. A first screw rod is rotatably connected in the guide frame, and the adjustment plate is threadedly connected to the first screw rod.

[0009] Specifically, a guide rod is fixedly connected in the guide frame, the adjustment plate is slidably connected to the guide rod, an adjustment shaft is rotatably connected to the adjustment plate, a second motor is installed at the bottom of the adjustment plate, the adjustment shaft is fixedly connected to the output shaft of the second motor, a first motor is installed on the guide frame, and the first screw rod is fixedly connected to the output shaft of the first motor.

[0010] Specifically, the crushing structure includes a feed box fixedly connected to the adjusting shaft and a connecting shaft rotatably connected to the feed box, a crushing roller is fixedly connected to the connecting shaft, a gear is fixedly connected to the connecting shaft, and the two gears are meshed.

[0011] Specifically, a mounting seat is fixedly connected to the discharge box, a third motor is installed on the mounting seat, and one of the connecting shafts is fixedly connected to the output shaft of the third motor.

[0012] Specifically, two connecting sleeves are fixedly connected to the bottom of the discharge box, and the two connecting sleeves are slidably connected to the two discharge pipes respectively.

[0013] Specifically, the maintenance structure includes three maintenance doors detachably connected to the coal mill body and three mounting sleeves installed on the coal mill body, and mounting blocks are slidably connected inside the mounting sleeves. The three mounting blocks are respectively engaged with the three maintenance doors, and the cross-section of the mounting blocks is a trapezoidal structure.

[0014] Specifically, a guide block is fixedly connected to the mounting block, a spring is fixedly connected between the guide block and the mounting sleeve, and a pull plate is fixedly connected to the mounting block.

[0015] Specifically, a connecting frame is slidably connected inside the inspection door, a sealing ring is fixedly connected to the connecting frame, the sealing ring is in contact with the coal mill body, a sliding rod is fixedly connected to the connecting frame, a second screw rod is rotatably connected to the sliding rod, the second screw rod is threadedly connected to the inspection door, and a rotating rod is fixedly connected to the second screw rod.

[0016] A method for synchronously increasing the air temperature and water temperature of a boiler coal mill comprises the following steps:

[0017] S1: A portion of high-temperature steam is drawn out from the steam system of the first heating structure, transported to the primary air and heat exchanged with the primary air, the heat is transferred to the primary air, the temperature of the primary air is increased, the pulverized coal is dried, and when the feed water flows through the second heating structure, the temperature is gradually increased through heat exchange with the high-temperature medium, so that the feed water temperature rises steadily to the set target value, and the preheated feed water enters the boiler body;

[0018] S2: Before the material enters the coal mill body, it is preliminarily crushed by the crushing structure, so that the material is broken into small pieces and then fed into the coal mill body. At the same time, when the crushing components in the crushing structure need to be maintained or replaced, the height of the crushing structure can be adjusted through the adjustment structure;

[0019] S3: During maintenance, the coal grinding components inside the coal grinding machine body are replaced and repaired by using the maintenance structure.

[0020] The beneficial effects of the present invention are:

[0021] (1) The present invention discloses a device and method for synchronously increasing the air temperature and water temperature of a boiler coal mill. A first heating structure is provided between the base and the coal mill body, and a second heating structure is provided between the base and the first heating structure. The arrangement of the first heating structure and the second heating structure can synchronously increase the primary air temperature at the outlet of the coal mill body and the feed water temperature of the boiler body, thereby creating better conditions for coal powder combustion and making coal powder burn more fully, thereby improving the combustion efficiency of the boiler body. At the same time, increasing the feed water temperature can reduce the amount of fuel required to heat the feed water to steam. At the same time, the optimized primary air temperature contributes to the stability and efficiency of the combustion process, reduces the additional fuel input, and achieves energy conservation.

[0022] (2) The present invention discloses a device and method for synchronously improving the air temperature and water temperature of a boiler coal mill. The base is provided with an adjusting structure, and the adjusting structure is provided with a crushing structure. The setting of the crushing structure facilitates the preliminary crushing of the material entering the coal mill body, thereby preventing the material from entering the coal mill body from being too large in size, thereby increasing the energy consumption and wear of the coal mill body, and affecting the normal operation and service life of the coal mill body. At the same time, the crushed material will slide down the discharge pipe into the coal mill body. The setting of the adjusting structure facilitates the lowering of the height of the discharge box, thereby reducing the difficulty of overhauling the crushing components.

[0023] (3) The present invention discloses a device and method for synchronously increasing the air temperature and water temperature of a boiler coal mill. A maintenance structure is provided on the coal mill body. The mounting block in the maintenance structure engages with the maintenance door, which facilitates quick disassembly and assembly of the maintenance door and the coal mill body, thereby improving the efficiency of disassembly and assembly of the maintenance door and thus improving the efficiency of internal maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 A schematic diagram of the overall structure of a preferred embodiment of a device and method for synchronously increasing the air temperature and water temperature of a boiler coal mill provided by the present invention;

[0026] Figure 2 for Figure 1 An enlarged schematic diagram of the structure of section A is shown;

[0027] Figure 3 A schematic diagram of the connection structure between the steam turbine and the base of the present invention;

[0028] Figure 4 A schematic diagram of the connection structure between the coal mill body and the base of the present invention;

[0029] Figure 5 A schematic diagram of the connection structure between the connecting shaft and the material box of the present invention;

[0030] Figure 6 A schematic diagram of the connection structure between the adjustment plate and the guide frame of the present invention;

[0031] Figure 7 A schematic structural diagram of a crushing roller according to the present invention;

[0032] Figure 8 A schematic diagram of the connection structure between the inspection door and the coal mill body of the present invention;

[0033] Fig. 9 A schematic diagram of the connection structure between the slide bar and the inspection door of the present invention;

[0034] Fig.10 for Fig. 9 An enlarged schematic diagram of the structure of part B is shown;

[0035] Fig.11 A schematic diagram of the connection structure between the guide block and the mounting block of the present invention;

[0036] Fig.12 A schematic diagram of the connection structure between the sealing ring and the connection frame of the present invention;

[0037] Fig.13 A schematic diagram of the connection structure between the sleeve heat exchanger and the powder pipe of the present invention;

[0038] Fig.14 A schematic structural diagram of the spiral blade of the present invention.

[0039] In the figure: 1, base; 2, first heating structure; 201, boiler body; 202, first pipeline; 203, second pipeline; 204, pressure reducing valve; 205, third pipeline; 206, fourth pipeline; 207, first isolation valve; 208, fifth pipeline; 209, regulating valve; 210, sixth pipeline; 211, sleeve heat exchanger; 212, seventh pipeline; 213, spiral blade; 3, second heating structure; 301, steam turbine; 302, eighth pipeline; 303, second isolation valve; 304, ninth pipeline; 305, high pressure heater; 306, tenth pipeline; 4, regulating structure; 401, guide frame; 402, regulating plate; 403, first 1. Screw; 404. First motor; 405. Guide rod; 406. Adjustment shaft; 407. Second motor; 5. Crushing structure; 501. Discharge box; 502. Connecting shaft; 503. Crushing roller; 504. Gear; 505. Mounting seat; 506. Third motor; 507. Connecting sleeve; 6. Inspection structure; 601. Inspection door; 602. Mounting sleeve; 603. Mounting block; 604. Pull plate; 605. Guide block; 606. Spring; 607. Sealing ring; 608. Connecting frame; 609. Sliding rod; 610. Second screw; 611. Rotating rod; 7. Coal mill body; 8. Discharge pipe; 9. Powder pipe; 10. Fixed pipe; 11. Conveying pipe. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 , Fig. 9 , Fig.10 , Fig.13 and Fig.14 As shown, the device and method for synchronously improving the air temperature and water temperature of a boiler coal mill described in the present invention include a base 1, two coal mill bodies 7 installed on the base 1, a first heating structure 2 installed between the base 1 and the coal mill body 7, a second heating structure 3 installed between the base 1 and the first heating structure 2, an adjustment structure 4 installed on the base 1, a crushing structure 5 installed on the adjustment structure 4, an inspection structure 6 provided on the coal mill body 7, four powder pipes 9 installed on the coal mill body 7, and an installation The first heating structure 2 comprises a boiler body 201 installed on the base 1 and a first pipeline 202 installed on the boiler body 201. The delivery pipe 11 is connected to the burner interface of the boiler body 201. A sleeve heat exchanger 211 is installed on the powder pipe 9. A spiral blade 213 is fixedly connected between the powder pipe 9 and the sleeve heat exchanger 211. The sleeve heat exchanger 211 is connected to the boiler body 201. The inlet and outlet of the device 211 are both installed with a sixth pipeline 210, a regulating valve 209 is installed between every four sixth pipelines 210, a fifth pipeline 208 is installed on the regulating valve 209, a first isolation valve 207 is installed on the fifth pipeline 208, a fourth pipeline 206 is installed between two of the first isolation valves 207, a third pipeline 205 is fixedly connected to the fourth pipeline 206 above, a pressure reducing valve 204 is installed on the third pipeline 205, and a second pipeline 206 is installed between the pressure reducing valve 204 and the first pipeline 202. 3; the second heating structure 3 includes a steam turbine 301 installed on the base 1 and an eighth pipeline 302 installed on the steam turbine 301, the other end of the first pipeline 202 is installed on the steam turbine 301, a high-pressure heater 305 is installed on the base 1, a second isolation valve 303 is installed on the eighth pipeline 302, a ninth pipeline 304 is installed between the second isolation valve 303 and the high-pressure heater 305, and a seventh pipeline 212 is fixedly connected between the high-pressure heater 305 and the fourth pipeline 206 below.

[0042] Specifically, Figure 3 and Figure 4As shown, a tenth pipeline 306 is installed between the high-pressure heater 305 and the water pump inlet of the boiler body 201. First, the steam in the boiler body 201 enters the turbine 301 through the first pipeline 202 to work, and the bypass superheated steam enters the pressure reducing valve 204 through the second pipeline 203 to become low-pressure bypass superheated steam after being reduced in pressure. The low-pressure bypass superheated steam will enter the third pipeline 205, and then enter the two first isolation valves 207 from the fourth pipeline 206 above, and then pass through the fifth pipeline 20 The steam flows through the regulating valve 209 between the first pipe 208 and the sixth pipe 210, and then enters the sleeve heat exchanger 211. After entering the sleeve heat exchanger 211, the steam flows in a spiral direction along the spiral blades 213. The steam exchanges heat with the primary air in the sleeve heat exchanger 211, and transfers the heat to the primary air in the powder pipe 9. The temperature of the heated primary air is increased, and the pulverized coal is dried. The pulverized coal enters the combustion link of the boiler body 201 from the fixed pipe 10 and the conveying pipe 11, and at the same time ensures the drying and The conveying effect is improved, and the combustion efficiency is improved. At the same time, the low-temperature steam will enter the seventh pipeline 212 from the fourth pipeline 206 below, and then enter the high-pressure heater 305 from the seventh pipeline 212, and then the second isolation valve 303 between the eighth pipeline 302 and the ninth pipeline 304 is closed. At this time, the low-temperature steam heats the low-temperature feed water through the high-pressure heater 305 to ensure that the feed water temperature rises steadily to the set target value. The preheated feed water enters the boiler body 201 through the tenth pipeline 306. By preheating the feed water, the feed water can be quickly converted into steam while absorbing relatively less fuel heat, thereby improving the steam generation efficiency. By synchronously increasing the primary air temperature at the outlet of the pulverizer body 7 and the feed water temperature of the boiler body 201, better conditions are created for the combustion of pulverized coal, and the pulverized coal is burned more fully, thereby improving the combustion efficiency of the boiler body 201. At the same time, increasing the feed water temperature can reduce the amount of fuel required to heat the feed water to steam. At the same time, the optimized primary air temperature is conducive to the stability and efficiency of the combustion process, reducing the additional input of fuel, and realizing energy saving.

[0043] Specifically, Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the adjustment structure 4 includes a guide frame 401 installed on the base 1 and an adjustment plate 402 slidably connected to the guide frame 401, a first screw rod 403 is rotatably connected in the guide frame 401, the adjustment plate 402 is threadedly connected to the first screw rod 403, a guide rod 405 is fixedly connected in the guide frame 401, the adjustment plate 402 is slidably connected to the guide rod 405, an adjustment shaft 406 is rotatably connected to the adjustment plate 402, a second motor 407 is installed at the bottom of the adjustment plate 402, the adjustment shaft 406 is fixedly connected to the output shaft of the second motor 407, a first motor 404 is installed on the guide frame 401, and the first screw rod 403 is fixedly connected to the output shaft of the first motor 404 The crushing structure 5 includes a material box 501 fixedly connected to the adjusting shaft 406 and a connecting shaft 502 rotatably connected to the material box 501, a crushing roller 503 is fixedly connected to the connecting shaft 502, a gear 504 is fixedly connected to the connecting shaft 502, and the two gears 504 are meshed with each other. A mounting seat 505 is fixedly connected to the material box 501, and a third motor 506 is installed on the mounting seat 505, one of the connecting shafts 502 is fixedly connected to the output shaft of the third motor 506, and two connecting sleeves 507 are fixedly connected to the bottom of the material box 501, and the two connecting sleeves 507 are respectively slidably connected to two material tubes 8. When it is necessary to add materials to the coal mill body 7, The materials are transported to the discharge box 501 through the conveying equipment, and at the same time, the third motor 506 on the mounting seat 505 is started. When the output shaft of the third motor 506 rotates, it drives one of the connecting shafts 502 to rotate, and the connecting shaft 502 drives the gear 504 to rotate. The two gears 504 will rotate relatively, so that the two connecting shafts 502 drive the two crushing rollers 503 to rotate, so that the crushing rollers 503 perform preliminary crushing on the materials entering the coal mill body 7, so as to avoid that the materials entering the coal mill body 7 are too large in size, which increases the energy consumption and wear of the coal mill body 7 and affects the normal operation and service life of the coal mill body 7. At the same time, the crushed materials will slide down the discharge pipe 8 into the coal mill body 7. When the crushing components need to be replaced or maintained, they can be replaced or maintained by By starting the first motor 404, the output shaft of the first motor 404 rotates and drives the first screw rod 403 to rotate. When the first screw rod 403 rotates, the thread drives the adjustment plate 402 to slide in the guide frame 401, and the adjustment plate 402 will slide with the guide rod 405. The setting of the guide rod 405 makes the adjustment plate 402 slide more smoothly. First, the adjustment plate 402 drives the discharge box 501 to move upward for a certain distance, so that the discharge box 501 drives the connecting sleeve 507 to no longer be plugged into the discharge pipe 8. Then, by starting the second motor 407, the output shaft of the second motor 407 rotates and drives the adjustment shaft 406 to rotate. The adjustment shaft 406 drives the discharge box 501 to rotate to one side, and then drives the adjustment plate 402 to move downward through the first screw rod 403.The adjusting plate 402 drives the material box 501 to move downward, so as to lower the height of the material box 501, thereby reducing the difficulty of overhauling the crushing assembly.

[0044] Specifically, Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, the inspection structure 6 includes three inspection doors 601 detachably connected to the coal mill body 7 and three mounting sleeves 602 mounted on the coal mill body 7, a mounting block 603 is slidably connected in the mounting sleeve 602, and the three mounting blocks 603 are respectively engaged with the three inspection doors 601, and the cross-section of the mounting block 603 is a trapezoidal structure, a guide block 605 is fixedly connected to the mounting block 603, a spring 606 is fixedly connected between the guide block 605 and the mounting sleeve 602, a pull plate 604 is fixedly connected to the mounting block 603, and a connecting plate 604 is slidably connected in the inspection door 601. The connecting frame 608 is fixedly connected with a sealing ring 607, and the sealing ring 607 contacts with the coal mill body 7. The connecting frame 608 is fixedly connected with a sliding rod 609, and the sliding rod 609 is rotatably connected with a second screw rod 610, and the second screw rod 610 is threadedly connected with the inspection door 601. The second screw rod 610 is fixedly connected with a rotating rod 611. When the inside of the coal mill body 7 needs to be inspected, the pull plate 604 can be pulled upward. When the pull plate 604 moves upward, it drives the installation block 603 to move. When the installation block 603 moves, the guide block 605 slides in the installation sleeve 602, and the guide block 605 slides in the installation sleeve 602. When the spring 606 contracts, when the mounting block 603 is no longer engaged with the inspection door 601, the inspection door 601 can be removed from the coal mill body 7 by pulling the rotating rod 611 to inspect the internal components. At the same time, when installing, it is only necessary to slide the inspection door 601 between the coal mill body 7. Since the cross-section of the mounting block 603 is a trapezoidal structure, when the inspection door 601 contacts the inclined surface of the mounting block 603, the mounting block 603 will automatically slide upward. When the mounting groove of the inspection door 601 corresponds to the mounting block 603, the mounting block 603 will be engaged with the inspection door 601 under the action of the spring 606. The inspection door 601 is engaged, which is convenient for quick disassembly and assembly between the inspection door 601 and the coal mill body 7, thereby improving the disassembly and assembly efficiency of the inspection door 601, thereby improving the internal maintenance efficiency. When the installation is completed, the second screw rod 610 can be driven to rotate by the rotating rod 611, and the second screw rod 610 and the inspection door 601 thread cooperate to drive the sliding rod 609 to slide. When the sliding rod 609 slides, it drives the connecting frame 608 to move. The connecting frame 608 will drive the sealing ring 607 to press against the coal mill body 7. The sealing between the inspection door 601 and the coal mill body 7 is improved by pressing against the sealing ring 607.

[0045] A method for synchronously increasing the air temperature and water temperature of a boiler coal mill comprises the following steps:

[0046] S1: A portion of high-temperature steam is drawn out from the steam system of the first heating structure 2, transported to the primary air and heat exchanged with the primary air, the heat is transferred to the primary air, the temperature of the primary air is increased, the pulverized coal is dried, and when the feed water flows through the second heating structure 3, the temperature is gradually increased through heat exchange with the high-temperature medium, so that the feed water temperature is stably increased to the set target value, and the preheated feed water enters the boiler body 201;

[0047] S2: Before the material enters the coal mill body 7, the material is preliminarily crushed by the crushing structure 5, so that the material is broken into small pieces and then fed into the coal mill body 7. At the same time, when the crushing components in the crushing structure 5 need to be maintained or replaced, the height of the crushing structure 5 can be adjusted by the adjusting structure 4;

[0048] S3: During maintenance, the coal grinding components inside the coal grinding machine body 7 are replaced and repaired by using the maintenance structure 6.

[0049] When the present invention is in use, first, the steam in the boiler body 201 enters the turbine 301 through the first pipe 202 to work, and the bypass superheated steam enters the pressure reducing valve 204 through the second pipe 203 to become low-pressure bypass superheated steam after being reduced in pressure. The low-pressure bypass superheated steam will enter the third pipe 205, and then enter the two first isolation valves 207 from the fourth pipe 206 above, and then the flow rate is adjusted by the regulating valve 209 between the fifth pipe 208 and the sixth pipe 210, and then enter the sleeve heat exchanger 211. After entering the sleeve heat exchanger 211, the steam will spirally flow with the vertical spiral blades 213. The steam exchanges heat with the primary air in the sleeve heat exchanger 211, and transfers heat to the primary air in the powder pipe 9. The temperature of the heated primary air is increased, and the coal powder is dried. The coal powder will enter the combustion link of the boiler body 201 from the fixed pipe 10 and the conveying pipe 11, while ensuring the drying and conveying effects of the coal powder, improving the combustion efficiency, and at the same time, the low temperature Steam will enter the seventh pipeline 212 from the fourth pipeline 206 below, and then enter the high-pressure heater 305 from the seventh pipeline 212, and then the second isolation valve 303 between the eighth pipeline 302 and the ninth pipeline 304 will be closed. At this time, the low-temperature steam heats the low-temperature feed water through the high-pressure heater 305 to ensure that the feed water temperature rises steadily to the set target value. The preheated feed water enters the boiler body 201 through the tenth pipeline 306. By preheating the feed water, the feed water can be quickly converted into steam while absorbing relatively less fuel heat, thereby improving the steam generation efficiency. By synchronously increasing the primary air temperature at the outlet of the pulverizer body 7 and the feed water temperature of the boiler body 201, better conditions are created for the combustion of pulverized coal, so that the pulverized coal burns more fully, thereby improving the combustion efficiency of the boiler body 201. At the same time, increasing the feed water temperature can reduce the amount of fuel required to heat the feed water to steam. At the same time, the optimized primary air temperature contributes to the stability and efficiency of the combustion process, reduces the additional input of fuel, and achieves energy conservation.

[0050] When it is necessary to add materials to the coal mill body 7, the materials can be transported to the discharge box 501 through the conveying equipment, and at the same time, the third motor 506 on the mounting seat 505 can be started. When the output shaft of the third motor 506 rotates, it drives one of the connecting shafts 502 to rotate, and the connecting shaft 502 drives the gear 504 to rotate. The two gears 504 will rotate relatively, so that the two connecting shafts 502 drive the two crushing rollers 503 to rotate, so that the crushing rollers 503 perform preliminary crushing on the materials entering the coal mill body 7, so as to avoid that the materials entering the coal mill body 7 are too large in size, which increases the energy consumption and wear of the coal mill body 7 and affects the normal operation and service life of the coal mill body 7. At the same time, the crushed materials will slide into the coal mill body 7 along the discharge pipe 8. When the crushing component needs to be replaced or maintained, the first motor 404 can be started. When the output shaft of 4 rotates, it drives the first screw rod 403 to rotate. When the first screw rod 403 rotates, the thread drives the adjusting plate 402 to slide in the guide frame 401. The adjusting plate 402 will slide with the guide rod 405. The setting of the guide rod 405 makes the adjusting plate 402 slide more smoothly. First, the adjusting plate 402 drives the material box 501 to move upward for a certain distance, so that the material box 501 drives the connecting sleeve 507 to no longer be plugged with the material tube 8. Then, by starting the second motor 407, the output shaft of the second motor 407 drives the adjusting shaft 406 to rotate. The adjusting shaft 406 drives the material box 501 to rotate to one side, and then drives the adjusting plate 402 to move downward through the first screw rod 403, and drives the material box 501 to move downward through the adjusting plate 402, so as to facilitate lowering the height of the material box 501, thereby reducing the difficulty of operating the crushing assembly.

[0051] When it is necessary to inspect the inside of the coal mill body 7, the pull plate 604 can be pulled upwards. When the pull plate 604 moves upward, it drives the installation block 603 to move. When the installation block 603 moves, the guide block 605 slides in the installation sleeve 602, and the spring 606 contracts. When the installation block 603 is no longer engaged with the inspection door 601, the inspection door 601 can be removed from the coal mill body 7 by pulling the rotating rod 611 to inspect the internal components. At the same time, when installing, it is only necessary to slide the inspection door 601 between the coal mill body 7. Since the cross-section of the installation block 603 is a trapezoidal structure, when the inspection door 601 contacts the inclined surface of the installation block 603, the installation block 603 will automatically slide upward. When the installation groove of the inspection door 601 is aligned with the installation block 603, the installation block 603 will slide upward automatically. When corresponding, the mounting block 603 will engage with the inspection door 601 under the action of the spring 606. By engaging the mounting block 603 with the inspection door 601, it is convenient to quickly disassemble and assemble the inspection door 601 and the coal mill body 7, thereby improving the disassembly and assembly efficiency of the inspection door 601, thereby improving the internal maintenance efficiency. When the installation is completed, the second screw rod 610 can be driven to rotate by the rotating rod 611, and the second screw rod 610 and the inspection door 601 thread cooperate to drive the sliding rod 609 to slide. When the sliding rod 609 slides, it drives the connecting frame 608 to move. The connecting frame 608 will drive the sealing ring 607 to press against the coal mill body 7. By pressing against the sealing ring 607 and the coal mill body 7, the sealing between the inspection door 601 and the coal mill body 7 is improved.

[0052] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for synchronously increasing the air temperature and water temperature of a boiler coal mill, characterized in that: The invention comprises a base (1), two coal mill bodies (7) mounted on the base (1), a first heating structure (2) mounted between the base (1) and the coal mill body (7), a second heating structure (3) mounted between the base (1) and the first heating structure (2), an adjustment structure (4) mounted on the base (1), a crushing structure (5) mounted on the adjustment structure (4), an inspection structure (6) provided on the coal mill body (7), four powder pipes (9) mounted on the coal mill body (7), a fixed pipe (10) mounted on the eight powder pipes (9), a conveying pipe (11) fixedly connected to the fixed pipe (10), and a discharge pipe (8) mounted on the coal mill body (7); The first heating structure (2) comprises a boiler body (201) mounted on the base (1) and a first pipe (202) mounted on the boiler body (201); the delivery pipe (11) is connected to the burner interface of the boiler body (201); a sleeve heat exchanger (211) is mounted on the powder pipe (9); a spiral blade (213) is fixedly connected between the powder pipe (9) and the sleeve heat exchanger (211); the inlet and outlet of the sleeve heat exchanger (211) are both mounted with a sixth pipe (210); and every four sixth pipes (210) are connected to each other. 10), a regulating valve (209) is installed between the regulating valve (209), a fifth pipeline (208) is installed on the regulating valve (209), a first isolation valve (207) is installed on the fifth pipeline (208), a fourth pipeline (206) is installed between the two first isolation valves (207), a third pipeline (205) is fixedly connected to the upper fourth pipeline (206), a pressure reducing valve (204) is installed on the third pipeline (205), and a second pipeline (203) is installed between the pressure reducing valve (204) and the first pipeline (202); The second heating structure (3) comprises a steam turbine (301) mounted on the base (1) and an eighth pipeline (302) mounted on the steam turbine (301); the other end of the first pipeline (202) is mounted on the steam turbine (301); a high-pressure heater (305) is mounted on the base (1); a second isolation valve (303) is mounted on the eighth pipeline (302); a ninth pipeline (304) is mounted between the second isolation valve (303) and the high-pressure heater (305); a seventh pipeline (212) is fixedly connected between the high-pressure heater (305) and the fourth pipeline (206) below; and a tenth pipeline (306) is mounted between the high-pressure heater (305) and a water pump water inlet of the boiler body (201).

2. The device for synchronously increasing the air temperature and water temperature of a boiler coal mill according to claim 1, characterized in that: The adjustment structure (4) comprises a guide frame (401) mounted on the base (1) and an adjustment plate (402) slidably connected to the guide frame (401); a first screw rod (403) is rotatably connected inside the guide frame (401); and the adjustment plate (402) is threadedly connected to the first screw rod (403).

3. The device for synchronously increasing the air temperature and water temperature of a boiler coal mill according to claim 2, characterized in that: A guide rod (405) is fixedly connected inside the guide frame (401), the adjustment plate (402) is slidably connected to the guide rod (405), an adjustment shaft (406) is rotatably connected to the adjustment plate (402), a second motor (407) is installed at the bottom of the adjustment plate (402), the adjustment shaft (406) is fixedly connected to the output shaft of the second motor (407), a first motor (404) is installed on the guide frame (401), and the first screw rod (403) is fixedly connected to the output shaft of the first motor (404).

4. The device for synchronously increasing the air temperature and water temperature of a boiler coal mill according to claim 3, characterized in that: The crushing structure (5) comprises a material discharge box (501) fixedly connected to the adjusting shaft (406) and a connecting shaft (502) rotatably connected to the material discharge box (501), a crushing roller (503) being fixedly connected to the connecting shaft (502), a gear (504) being fixedly connected to the connecting shaft (502), and the two gears (504) being meshed with each other.

5. The device for synchronously increasing the air temperature and water temperature of a boiler coal mill according to claim 4, characterized in that: The unloading box (501) is fixedly connected to a mounting seat (505), a third motor (506) is mounted on the mounting seat (505), and one of the connecting shafts (502) is fixedly connected to an output shaft of the third motor (506).

6. The device for synchronously increasing the air temperature and water temperature of a boiler coal mill according to claim 5, characterized in that: Two connecting sleeves (507) are fixedly connected to the bottom of the discharge box (501), and the two connecting sleeves (507) are slidably connected to the two discharge pipes (8) respectively.

7. The device for synchronously increasing the air temperature and water temperature of a boiler coal mill according to claim 1, characterized in that: The inspection structure (6) comprises three inspection doors (601) detachably connected to the coal mill body (7) and three mounting sleeves (602) mounted on the coal mill body (7); a mounting block (603) is slidably connected inside the mounting sleeve (602); the three mounting blocks (603) are respectively engaged with the three inspection doors (601); and the cross-section of the mounting block (603) is a trapezoidal structure.

8. The device for synchronously increasing the air temperature and water temperature of a boiler coal mill according to claim 7, characterized in that: A guide block (605) is fixedly connected to the mounting block (603), a spring (606) is fixedly connected between the guide block (605) and the mounting sleeve (602), and a pull plate (604) is fixedly connected to the mounting block (603).

9. The device for synchronously increasing the air temperature and water temperature of a boiler coal mill according to claim 8, characterized in that: A connecting frame (608) is slidably connected inside the inspection door (601), a sealing ring (607) is fixedly connected to the connecting frame (608), the sealing ring (607) contacts the coal mill body (7), a sliding rod (609) is fixedly connected to the connecting frame (608), a second screw rod (610) is rotatably connected to the sliding rod (609), the second screw rod (610) is threadedly connected to the inspection door (601), and a rotating rod (611) is fixedly connected to the second screw rod (610).

10. A method for synchronously increasing the air temperature and water temperature of a boiler coal mill according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: A portion of high-temperature steam is drawn from the steam system of the first heating structure (2), transported to the primary air, and heat exchanged with the primary air, so that the heat is transferred to the primary air, so that the temperature of the primary air is increased, and the pulverized coal is dried. When the feed water flows through the second heating structure (3), the temperature is gradually increased through heat exchange with the high-temperature medium, so that the feed water temperature is stably increased to a set target value, and the preheated feed water enters the boiler body (201); S2: Before the material enters the coal mill body (7), the material is preliminarily crushed by the crushing structure (5) so that the material is broken into small pieces and then fed into the coal mill body (7). At the same time, when the crushing components in the crushing structure (5) need to be maintained or replaced, the height of the crushing structure (5) can be adjusted by the adjustment structure (4); S3: During maintenance, the coal grinding components inside the coal grinding machine body (7) are replaced and repaired by using the maintenance structure (6).

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