Energy-saving pulverized coal furnace direct combustion system

Abstract

The utility model relates to an energy-saving pulverized coal furnace direct burning system which comprises a pulverized coal storage tank, a burner and a boiler body, a conveying pipe is arranged at the bottom of the pulverized coal storage tank and communicated with the burner, the burner is installed on the boiler body, the burning end of the burner is arranged in the boiler body, and the burning end of the burner is communicated with the boiler body. A slag discharging box is arranged below the boiler body, a waste gas guide pipe is installed above the slag discharging box, the waste gas guide pipe is connected with a dust bag-type dust remover, and an exhaust port of the dust bag-type dust remover is communicated with a gas inlet of a combustor. When the energy-saving direct combustion system of the pulverized coal furnace is used, slag is discharged through the slag discharging box, waste gas is conveyed into the dust bag-type dust collector through the waste gas guide pipe to be filtered, and then the waste gas is conveyed into the combustor through the dust bag-type dust collector to be recycled for the second time. And the purposes of energy conservation and environmental protection are achieved by recycling the flue gas and reutilizing the flue gas.

Description

Technical Field

[0001] The utility model belongs to the technical field of pulverized coal furnaces, and in particular relates to an energy-saving pulverized coal furnace direct-burning system. Background Art

[0002] China burns 1.5 billion tons of coal every year, of which 800 million tons are used for coal-fired thermal power generation and 700 million tons are used for coal-fired industrial furnaces. my country's coal-based energy structure will be difficult to change for a long time in the future. With the improvement of air pollutant emission standards for coal-fired furnaces, efficient and clean coal combustion technology is an inevitable requirement for future development. Pulverized coal furnaces increase the combustion rate of coal, are highly efficient and energy-saving, and are easy to start and stop. They are widely used in various fields. Pulverized coal furnaces are boiler equipment that uses pulverized coal as fuel. They have the advantages of rapid and complete combustion, large capacity, high efficiency, wide adaptability to coal types, and easy control and adjustment. The combustion characteristics of pulverized coal furnaces are that the fuel enters the combustion chamber together with the air and burns in a suspended state.

[0003] The existing publication number is CN213542455U, which is a wear-resistant pulverized coal furnace. It increases the service life of the device and has a high preheating efficiency, thereby reducing the use of fuel by the device. However, the pulverized coal furnace generates a large amount of exhaust gas during combustion, a part of which is converted into fly ash through flue gas transportation and discharged from the flue gas outlet. Since a large amount of exhaust gas is generated by the combustion of pulverized coal, it is directly discharged from the flue gas outlet to cause pollution to the environment. Utility Model Content

[0004] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide an energy-saving pulverized coal furnace direct-firing system, which can recycle its flue gas for secondary utilization.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: an energy-saving pulverized coal furnace direct-firing system, including a pulverized coal storage tank, a burner and a boiler body, a transmission pipe is provided at the bottom of the pulverized coal storage tank, the transmission pipe is connected to the burner, the burner is installed on the boiler body, the combustion end of the burner is placed in the boiler body, a slag box is provided below the boiler body, an exhaust gas duct is installed above the slag box, the exhaust gas duct is connected to a dust bag collector, and the exhaust port of the dust bag collector is connected to the gas inlet of the burner.

[0006] An auxiliary transmission component is installed in the pulverized coal storage tank.

[0007] The auxiliary transmission assembly includes a forward and reverse motor, a support frame, a screw and a sliding seat. The forward and reverse motors are installed on the top of the coal powder storage tank, the support frame is installed in the coal powder storage tank, the screw is rotatably installed on the support frame and is transmission-connected to the forward and reverse motors, the sliding seat is transmission-installed on the screw, the support frame is provided with a guide rod for guiding the sliding seat, a rotating ring is rotatably installed under the sliding seat, the rotating ring is transmission-connected to the screw, two scrapers are installed on the rotating ring, the two scrapers are symmetrically arranged, and the scrapers fit the inner wall of the coal powder storage tank.

[0008] A gear part connected to the screw rod for transmission is rotatably installed in the sliding seat, a gear ring meshing with the gear part is provided on the guide upper rotating sleeve, and an internal gear meshing with the gear ring is installed in the rotating ring.

[0009] An auxiliary cleaning plate is installed below the scraper. The auxiliary cleaning plate is arranged to be inclined from high to low along the height direction of the coal powder storage tank toward the bottom of the coal powder storage tank, and one side of the auxiliary cleaning plate is arranged to be in contact with the inner wall of the coal powder storage tank.

[0010] A stirring rod is rotatably mounted below the support frame, and the stirring rod is coaxially connected with the screw rod.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model discloses an energy-saving pulverized coal furnace direct-firing system. When in use, slag is discharged through a slag discharge box, and then the exhaust gas is transmitted through an exhaust gas duct to be placed in a dust bag collector for filtration, and then the exhaust gas is transmitted through the dust bag collector to a burner for secondary recycling, thereby realizing secondary recycling of the flue gas and achieving the purpose of energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of the pulverized coal furnace direct-firing system of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the pulverized coal storage tank of the utility model;

[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the rotating ring of the utility model.

[0016] Markings in the figure: 1. Coal powder storage tank; 2. Burner; 3. Boiler body; 4. Slag discharge box; 5. Dust bag collector; 6. Forward and reverse motor; 7. Support frame; 8. Screw rod; 9. Sliding seat; 10. Guide rod; 11. Rotating ring; 12. Scraper; 13. Gear part; 14. Gear ring; 15. Internal gear; 16. Auxiliary cleaning plate; 17. Stirring rod. DETAILED DESCRIPTION

[0017] In order to make the above features and advantages of the present invention more obvious and understandable, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0018] like Figure 1-Figure 3 As shown, this embodiment provides an energy-saving pulverized coal furnace direct-burning system, including a pulverized coal storage tank 1, a burner 2 and a boiler body 3. A transmission pipe is provided at the bottom of the pulverized coal storage tank 1, and the transmission pipe is connected to the burner 2. The burner 2 is installed on the boiler body 3, and the combustion end of the burner 2 is placed in the boiler body 3. A slag box 4 is provided below the boiler body 3, and an exhaust gas duct is installed above the slag box 4. The exhaust gas duct is connected to a dust bag filter 5, and the exhaust port of the dust bag filter 5 is connected to the gas inlet of the burner 2. When in use, slag is discharged through the slag box 4, and then the exhaust gas is transmitted through the exhaust gas duct to the dust bag filter 5 for filtration, and then the exhaust gas is introduced into the burner 2 through the dust bag filter 5 for secondary recycling, so as to achieve the purpose of energy saving and environmental protection by recycling the flue gas.

[0019] Furthermore, an auxiliary transmission assembly is installed in the coal powder storage tank 1. Specifically, the auxiliary transmission assembly includes a forward and reverse motor 6, a support frame 7, a screw 8 and a sliding seat 9. The forward and reverse motor 6 is installed on the top of the coal powder storage tank 1, the support frame 7 is installed in the coal powder storage tank 1, the screw 8 is rotatably installed on the support frame 7, and is connected to the forward and reverse motor 6 by transmission. The sliding seat 9 is installed on the screw 8 by transmission. The support frame 7 is provided with a guide rod 10 for guiding the sliding seat 9. A rotating ring 11 is rotatably installed below the sliding seat 9. The rotating ring 11 is connected to the screw 8 by transmission. Two scrapers 12 are installed on the rotating ring 11. The two scrapers 12 are symmetrically arranged, and the scrapers 12 are in contact with the inner wall of the coal powder storage tank 1. A gear member 13 connected to the screw 8 by transmission is rotatably installed in the sliding seat 9, and a gear ring 14 meshing with the gear member 13 is rotatably sleeved on the guide, and an internal gear 15 meshing with the gear ring 14 is installed in the rotating ring 11. After long-term use of the coal powder storage tank 1, a lot of coal powder is easily attached and accumulated on the inner wall of the coal powder storage tank 1. It can be started by controlling the forward and reverse motor 6 to rotate the screw 8, and then the sliding seat 9 moves downward along the guide rod 10 and drives the rotating ring 11 to rotate, so that the rotating ring 11 drives the two scrapers 12 to scrape the coal powder on the inner wall of the coal powder storage tank 1.

[0020] Furthermore, an auxiliary cleaning plate 16 is installed below the scraper 12, and the auxiliary cleaning plate 16 is arranged to be close to the bottom of the coal powder storage tank 1 along the height direction of the coal powder storage tank 1 and tilted from high to low, and one side of the auxiliary cleaning plate 16 is arranged to be close to the inner wall of the coal powder storage tank 1. By arranging the auxiliary cleaning plate 16, the cleaning area is larger and the cleaning efficiency is increased.

[0021] Further, a stirring rod 17 is rotatably mounted below the support frame 7, and the stirring rod 17 is coaxially connected with the screw rod 8. The coal powder at the bottom of the coal powder storage tank 1 can be stirred by the stirring rod 17 to prevent the coal powder from agglomerating and blocking the outlet.

[0022] The above shows and describes the basic principles and main features of the invention and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the invention, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. An energy-saving pulverized coal furnace direct-firing system, characterized in that: It includes a coal powder storage tank, a burner and a boiler body. A transmission pipe is provided at the bottom of the coal powder storage tank, and the transmission pipe is connected to the burner. The burner is installed on the boiler body, and the combustion end of the burner is placed in the boiler body. A slag box is provided below the boiler body, and an exhaust gas duct is installed above the slag box. The exhaust gas duct is connected to a dust bag collector, and the exhaust port of the dust bag collector is connected to the gas inlet of the burner.

2. The energy-saving pulverized coal furnace direct-firing system according to claim 1 is characterized in that: An auxiliary transmission component is installed in the pulverized coal storage tank.

3. The energy-saving pulverized coal furnace direct-firing system according to claim 2 is characterized in that: The auxiliary transmission assembly includes a forward and reverse motor, a support frame, a screw and a sliding seat. The forward and reverse motors are installed on the top of the coal powder storage tank, the support frame is installed in the coal powder storage tank, the screw is rotatably installed on the support frame and is transmission-connected to the forward and reverse motors, the sliding seat is transmission-installed on the screw, the support frame is provided with a guide rod for guiding the sliding seat, a rotating ring is rotatably installed under the sliding seat, the rotating ring is transmission-connected to the screw, two scrapers are installed on the rotating ring, the two scrapers are symmetrically arranged, and the scrapers fit the inner wall of the coal powder storage tank.

4. The energy-saving pulverized coal furnace direct-firing system according to claim 3 is characterized in that: A gear part connected to the screw rod for transmission is rotatably installed in the sliding seat, a gear ring meshing with the gear part is provided on the guide upper rotating sleeve, and an internal gear meshing with the gear ring is installed in the rotating ring.

5. The energy-saving pulverized coal furnace direct-firing system according to claim 3 is characterized in that: An auxiliary cleaning plate is installed below the scraper. The auxiliary cleaning plate is arranged to be inclined from high to low along the height direction of the coal powder storage tank toward the bottom of the coal powder storage tank, and one side of the auxiliary cleaning plate is arranged to be in contact with the inner wall of the coal powder storage tank.

6. The energy-saving pulverized coal furnace direct-firing system according to claim 3 is characterized in that: A stirring rod is rotatably mounted below the support frame, and the stirring rod is coaxially connected with the screw rod.

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