Energy-saving pulverized coal combustion furnace

Abstract

The utility model relates to an energy-saving pulverized coal combustion furnace, which comprises a pulverized coal storage tank, a combustor and a boiler body, a transmission pipe is arranged at the bottom of the pulverized coal storage tank, the transmission pipe is communicated with the combustor, the combustor is arranged on the boiler body, the combustion end of the combustor is arranged in the boiler body, and the combustion end of the combustor 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, and the waste gas guide pipe is connected with a flue gas water treater. When the energy-saving pulverized coal combustion furnace is used, waste gas is guided into the flue gas water treater, flue gas is filtered by water to form low-temperature inert cold gas, and the low-temperature inert cold gas returns to the combustor so as to control the oxygen concentration and temperature in the furnace, so that the effects of temperature control, energy conservation and consumption reduction are achieved; and the gas heated by the flue gas can enter the heat conduction pipe through the water guide pipe to dry the pulverized coal in the pulverized coal storage tank, so that the flue gas is recycled for secondary utilization, and the pulverized coal can be dried.

Description

Technical Field

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

[0002] Pulverized coal furnaces are widely used in various industrial fields due to their advantages such as rapid combustion, large capacity and high efficiency.

[0003] The existing publication number CN213542455U is a wear-resistant pulverized coal furnace, which 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 the flue gas transport and discharged from the flue gas outlet. Since the large amount of exhaust gas generated by the pulverized coal combustion is directly discharged from the flue gas outlet, it causes 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 present invention is to provide an energy-saving pulverized coal combustion furnace, which can recycle its flue gas for secondary utilization and can dry the pulverized coal.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an energy-saving pulverized coal combustion furnace, comprising 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 flue gas water treatment device, the exhaust port of the flue gas water treatment device is connected to the gas inlet of the burner, the flue gas water treatment device is provided with a water pipe, the water pipe is extended and placed on the pulverized coal storage tank, and a transmission pump is provided on the water pipe, a heat pipe connected to the water pipe is provided in the pulverized coal storage tank, and the heat pipe is connected to the water inlet end of the flue gas water treatment device.

[0006] The flue gas water treatment device includes a first water tank and a second water tank, which are connected side by side. The output port of the exhaust gas duct is placed in the water of the first water tank. The first water tank is provided with a flue gas exhaust pipe. The water pipe is connected to the first water tank. The output end of the heat pipe is connected to the second water tank. The second water tank is provided with a spray assembly that is connected to the first water tank for transmission.

[0007] A filter drawer is slidably mounted on the second water tank, and the filter drawer is located below the output end of the heat conduction pipe.

[0008] The filter drawer includes a fixing frame and multiple filter plates. The side wall of the second water tank is provided with a slot for the fixing frame to move. The multiple filter plates are stacked and arranged in the fixing frame. A sealing plate is provided on the side of the fixing frame facing the outside of the second water tank. The sealing plate is arranged to fit the outer wall of the second water tank.

[0009] The spray assembly includes a water pump and a nozzle. The water pump is placed at the bottom of the second water tank. The nozzle is installed on the inner wall of the second water tank. The spray end of the nozzle extends into the first water tank and is located below the smoke exhaust pipe. The nozzle is connected to the water pump.

[0010] The heat conducting pipe is spirally arranged from top to bottom along the height of the pulverized coal storage tank.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The utility model relates to an energy-saving pulverized coal combustion furnace. When in use, the exhaust gas is introduced into the flue gas water treatment device through the exhaust gas, and the flue gas is filtered by water to form a low-temperature inert cold gas, which is then returned to the burner to control the oxygen concentration and temperature in the furnace, thereby achieving the effect of temperature control, energy saving and consumption reduction. The gas heated by the flue gas can enter the heat conduction pipe through the water guide pipe to dry the coal powder in the coal powder storage tank, thereby realizing the secondary utilization of the flue gas and being able to dry the coal powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the energy-saving pulverized coal combustion furnace of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the flue gas water processor of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the pulverized coal storage tank of the utility model;

[0016] Figure 4 This is a structural diagram of the filter drawer of the utility model.

[0017] Markings in the figure: 1. Pulverized coal storage tank; 2. Burner; 3. Boiler body; 4. Slag box; 5. Flue gas water treatment device; 6. Water pipe; 7. Heat pipe; 8. First water tank; 9. Second water tank; 10. Flue gas exhaust pipe; 11. Filter drawer; 12. Fixing bracket; 13. Filter plate; 14. Sealing plate; 15. Water pump; 16. Nozzle. DETAILED DESCRIPTION

[0018] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below with reference to the accompanying drawings for detailed description.

[0019] like Figures 1-4 As shown, this embodiment provides an energy-saving pulverized coal combustion furnace, 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, which is connected to the burner 2. The burner 2 is mounted on the boiler body 3, and the combustion end of the burner 2 is placed inside the boiler body 3. A slag box 4 is provided below the boiler body 3, and an exhaust gas conduit is installed above the slag box 4. The exhaust gas conduit is connected to a flue gas water treatment device 5, and the exhaust port of the flue gas water treatment device 5 is connected to the gas inlet of the burner 2. The flue gas water treatment device 5 is provided with a water pipe 6, which extends and is placed on the pulverized coal storage tank 1. The water pipe 6 is equipped with a transmission pump. A heat pipe 7 is provided in the pulverized coal storage tank 1, which is connected to the water pipe 6 and is connected to the water inlet of the flue gas water treatment device 5. Specifically, the heat pipe 7 is spirally arranged from top to bottom along the height of the pulverized coal storage tank 1. It fully contacts the pulverized coal and heats and dries the coal. When in use, the exhaust gas is introduced into the flue gas water processor 5, and the flue gas is filtered by water to form a low-temperature inert cold gas, which is then returned to the burner 2 to control the oxygen concentration and temperature in the furnace, thereby achieving the effect of temperature control, energy saving and consumption reduction. The gas heated by the flue gas can enter the heat pipe 7 through the water pipe 6 to dry the coal powder in the coal powder storage tank 1, thereby realizing the secondary utilization of the flue gas and drying the coal powder.

[0020] Furthermore, the flue gas water treatment device 5 includes a first water tank 8 and a second water tank 9, which are connected side by side. The output port of the exhaust gas conduit is placed in the water of the first water tank 8. The first water tank 8 is provided with a flue gas exhaust pipe 10. The water pipe 6 is connected to the first water tank 8. The output end of the heat pipe 7 is connected to the second water tank 9. The second water tank 9 is provided with a spray assembly that is connected to the first water tank 8 for transmission. Specifically, the spray assembly includes a water pump 15 and a nozzle 16. The water pump 15 is placed at the bottom of the second water tank 9. The nozzle 16 is mounted on the inner wall of the second water tank 9. The spray end of the nozzle 16 extends into the first water tank 8 and is located below the flue gas exhaust pipe 10. The nozzle 16 is connected to the water pump 15. Through the cooperation of the water pump 15 and the nozzle 16, water is sprayed out to form a water barrier blocking the bottom of the flue gas exhaust pipe 10, thereby performing secondary filtration on the flue gas. The flue gas enters the first water tank 8 for filtration and is then discharged from the flue gas exhaust pipe 10. The water is then transferred to the heat pipe 7 through the water pipe 6, and then flows back to the second water tank 9 through the heat pipe 7. The water is then transferred to the first water tank 8 through the spray assembly to form a cycle.

[0021] Furthermore, a filter drawer 11 is slidably mounted on the second water tank 9 and is located below the output end of the heat pipe 7. Specifically, the filter drawer 11 includes a fixing frame 12 and multiple filter plates 13. The sidewalls of the second water tank 9 are provided with slots for the fixing frame 12 to move. Multiple filter plates 13 are stacked and arranged within the fixing frame 12. A sealing plate 14 is provided on the side of the fixing frame 12 facing the outside of the second water tank 9. The sealing plate 14 is mounted in contact with the outer wall of the second water tank 9. The multiple filter plates 13 filter and remove impurities from the water. When the filter plates 13 need to be replaced, they are replaced by pulling out the fixing frame and then removing the filter plates 13.

[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 only illustrate the principles of the utility model. Without departing from the spirit and scope of the invention, the utility model will have various changes and improvements, and these changes and improvements will fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An energy-saving pulverized coal combustion furnace, characterized in that: It includes 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, 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 flue gas water treatment device. The exhaust port of the flue gas water treatment device is connected to the gas inlet of the burner. The flue gas water treatment device is provided with a water pipe, which is extended and placed on the pulverized coal storage tank, and a transmission pump is provided on the water pipe. A heat pipe connected to the water pipe is provided in the pulverized coal storage tank, and the heat pipe is connected to the water inlet end of the flue gas water treatment device.

2. The energy-saving pulverized coal combustion furnace according to claim 1, characterized in that: The flue gas water treatment device includes a first water tank and a second water tank, which are connected side by side, and the output port of the exhaust gas duct is placed in the water of the first water tank. The first water tank is provided with a flue gas exhaust pipe, and the water pipe is connected to the first water tank. The output end of the heat pipe is connected to the second water tank, and the second water tank is provided with a spray assembly connected to the first water tank for transmission.

3. The energy-saving pulverized coal combustion furnace according to claim 2, characterized in that: A filter drawer is slidably mounted on the second water tank, and the filter drawer is arranged below the output end of the heat conduction pipe.

4. The energy-saving pulverized coal combustion furnace according to claim 3, characterized in that: The filter drawer includes a fixed frame and multiple filter plates. The side wall of the second water tank is provided with a slot for the fixed frame to move. The multiple filter plates are stacked and arranged in the fixed frame. A sealing plate is provided on the side of the fixed frame facing the outside of the second water tank. The sealing plate is arranged to fit the outer wall of the second water tank.

5. The energy-saving pulverized coal combustion furnace according to claim 2, characterized in that: The spray assembly includes a water pump and a nozzle. The water pump is placed at the bottom of the second water tank. The nozzle is installed on the inner wall of the second water tank. The spray end of the nozzle extends into the first water tank and is located below the smoke exhaust pipe. The nozzle is connected to the water pump.

6. The energy-saving pulverized coal combustion furnace according to claim 1, characterized in that: The heat conducting pipe is spirally arranged from top to bottom along the height of the coal powder storage tank.

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