Biomass drying system with fireproof protection
By introducing a large inclination belt machine, combustion machine, flame detector and PLC control system into the biomass drying system, combined with nitrogen fire extinguishing, the problem of spontaneous combustion of biomass raw materials is solved, and automatic fire extinguishing and equipment safety improvement is achieved.
Patent Information
- Application Number
- CN202422499548.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-16
AI Technical Summary
Biomass raw materials are prone to accumulate and spontaneous combustion when they are not moving smoothly at the inlet of the dryer, and the feed and combustion engine cannot be cut off in time after spontaneous combustion, resulting in the spread of the fire and burning the equipment, and lack of effective fire extinguishing measures.
The combination of a large inclination belt machine, a combustion engine, a hot air furnace, a flame detector and a PLC control system is adopted to detect the spontaneous combustion through the flame detector and control the equipment to stop operation, and use nitrogen to extinguish the fire to achieve automatic fire extinguishing.
Effectively prevents the dryer from spontaneous combustion, improves equipment safety, avoids equipment damage, and realizes automatic fire extinguishing function.
Smart Images
Figure CN223192050U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of biomass energy equipment, in particular to a biomass drying system with fire protection. Background Art
[0002] Biomass energy, as the most promising renewable energy source, is an effective technical approach to achieving "dual carbon," energy conservation, emission reduction, and environmental protection, and meets the current demands for environmental protection, energy conservation, and a low-carbon economy. Biomass resources are vast in quantity, but of low quality. Biomass raw materials typically contain a high amount of water, and must be dried before further utilization. Dryers are commonly used biomass drying equipment. During use, the following problems may arise:
[0003] (1) At the dryer inlet, the hot air temperature is the highest. If the raw materials do not move smoothly at the dryer inlet and accumulate, as the moisture in the biomass raw materials decreases, the biomass raw materials are very likely to spontaneously combust, and if spontaneous combustion occurs, it cannot be discovered in time.
[0004] (2) After spontaneous combustion occurs, the feed, burner and induced draft fan cannot be cut off in time, and the raw materials and hot air continue to enter the dryer, causing the fire in the dryer to become larger and larger, and eventually burning the equipment.
[0005] (3) After spontaneous combustion occurs, there are no effective fire-fighting measures.
[0006] Therefore, in order to solve the above problems, a biomass drying system with fire protection is proposed. Utility Model Content
[0007] The purpose of the utility model is to provide a biomass drying system with fire protection to solve the problems in the prior art mentioned in the above background technology, such as the accumulation of raw materials at the dryer inlet, the inability to cut off the feed, burner and induced draft fan in time after spontaneous combustion.
[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a biomass drying system with fire protection, comprising a high-angle belt conveyor and a burner, wherein the high-angle belt conveyor is connected to a feeder, and the raw materials enter the feeder through the high-angle belt conveyor, are transported by the feeder into a dryer, and are discharged from the discharger after being dried in the dryer;
[0009] The burner is connected to the hot blast furnace. The hot air in the hot blast furnace is extracted by the induced draft fan and enters the dryer through the fire channel. The rear end of the dryer is connected to the cyclone dust collector and is connected to the spray tower through the induced draft fan.
[0010] A flame detector is provided on the fire channel, and the flame detector is connected to the PLC control system signal. A regulating valve and a nitrogen pipeline are connected above the fire channel.
[0011] Preferably, the burner burns in a hot blast furnace to generate high-temperature hot blast.
[0012] Preferably, the PLC control system controls the operation of the high-angle belt conveyor, the loader, the burner, and the induced draft fan.
[0013] Preferably, the PLC control system controls the opening and closing of the regulating valve, and a regulating valve for opening and closing is provided in the middle position between the nitrogen pipeline and the fire channel.
[0014] Compared with the prior art, the beneficial effects of the present invention are:
[0015] 1. Solved the problem that the spontaneous combustion of biomass raw materials due to poor flow at the dryer inlet could not be discovered in time.
[0016] 2. Solved the problem that after the biomass raw materials spontaneously combust in the dryer, the feed, burner and induced draft fan cannot be cut off in time, and the raw materials and hot air continue to enter the dryer, causing the fire in the dryer to become bigger and bigger, and eventually burning the equipment.
[0017] 3. The automatic fire extinguishing function is realized when the biomass raw materials spontaneously combust in the dryer, which greatly improves the safety of the biomass drying system. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic front view of the structure of the present invention.
[0019] In the figure: 1. High-angle belt conveyor; 2. Loader; 3. Burner; 4. Hot air furnace; 5. Fire channel; 6. Regulating valve; 7. Nitrogen pipeline; 8. Flame detector; 9. Dryer; 10. Cyclone dust collector; 11. Induced draft fan; 12. Spray tower; 13. Discharger; 14. PLC control system. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0021] See also Figure 1 , an embodiment provided by the utility model:
[0022] A biomass drying system with fire protection includes a high-angle belt conveyor 1 and a burner 3. The high-angle belt conveyor 1 is connected to a feeder, and the raw materials enter the feeder 2 through the high-angle belt conveyor 1, are transported by the feeder 2 to the dryer 9, and are discharged from the discharger 13 after being dried in the dryer 9.
[0023] The burner 3 is connected to the hot air furnace 4. The hot air in the hot air furnace 4 is extracted by the induced draft fan 11 and then enters the dryer 9 through the fire channel 5. The rear end of the dryer 9 is connected to the cyclone dust collector 10, and is connected to the spray tower 12 through the induced draft fan 11.
[0024] A flame detector 8 is provided on the fire channel 5, and the flame detector 8 is connected to the PLC control system 14 signal. A regulating valve 6 and a nitrogen pipeline 7 are connected above the fire channel 5;
[0025] A flame detector 8 is installed between the fire channel 5 and the inlet of the dryer 9, and the outlet of the nitrogen pipeline 7 is arranged at the inlet of the dryer 9. When the drying system is in operation, the raw materials enter the feeder 2 through the high-angle belt conveyor 1, are transported by the feeder 2 to the dryer 9, and are discharged by the discharger 13 after being dried in the dryer 9. The burner 3 burns in the hot air furnace 4 to produce high-temperature hot air. The high-temperature hot air enters the dryer 9 through the fire channel 5 under the action of the induced draft fan 11. The raw materials and the hot air are fully contacted and heat exchanged in the dryer 9. The hot air after heat exchange is discharged from the rear end of the dryer 9 into the cyclone dust collector 10, and is then extracted by the induced draft fan 11 and sent to the spray tower 12 for discharge. If the material spontaneously combusts due to accumulation at the dryer inlet, the flame detector 8 will be triggered due to the appearance of open flame. The flame detector 8 will transmit the spontaneous combustion signal to the PLC control system 14 to issue an alarm message, thereby timely detecting the spontaneous combustion phenomenon.
[0026] When the PLC control system 14 issues an alarm message, it will immediately control the high-angle belt conveyor 1, the feeder 2, the burner 3, and the induced draft fan 11 to stop running, ensuring that the raw materials and hot air no longer enter the dryer, thereby preventing the fire in the dryer from getting bigger and bigger.
[0027] At the same time, the PLC control system 14 controls the regulating valve 6 to open, and the nitrogen in the nitrogen pipeline 7 quickly fills the entire dryer under its own pressure. Due to the lack of oxygen, the combustion cannot continue and the flame goes out.
[0028] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any ordinary technician in this industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.
Claims
1. A biomass drying system with fire protection, comprising a high-angle belt conveyor (1) and a burner (3), characterized in that: The high-angle belt conveyor (1) is connected to the feeder, and the raw materials enter the feeder (2) through the high-angle belt conveyor (1), are transported by the feeder (2) into the dryer (9), and are discharged by the discharger (13) after being dried in the dryer (9); The burner (3) is connected to the hot air furnace (4); the hot air in the hot air furnace (4) is extracted by the induced draft fan (11) and enters the dryer (9) through the fire channel (5); the rear end of the dryer (9) is connected to the cyclone dust collector (10), and is connected to the spray tower (12) through the induced draft fan (11); A flame detector (8) is provided on the fire channel (5), and the flame detector (8) is connected to a PLC control system (14) for signal transmission. A regulating valve (6) and a nitrogen pipeline (7) are connected above the fire channel (5).
2. The biomass drying system with fire protection according to claim 1, characterized in that: The burner (3) burns in the hot blast furnace (4) to generate high-temperature hot blast.
3. The biomass drying system with fire protection according to claim 2, characterized in that: The PLC control system (14) controls the operation of the high-angle belt conveyor (1), the feeder (2), the burner (3), and the induced draft fan (11).
4. The biomass drying system with fire protection according to claim 3, characterized in that: The PLC control system (14) controls the opening and closing of the regulating valve (6), and a regulating valve (6) for opening and closing is provided at a position between the nitrogen pipeline (7) and the fire channel (5).