Biomass fuel storage warehouse automatically turned over by gravity

Abstract

The present application belongs to the technical field of new energy fuel, and discloses a biomass fuel storage warehouse capable of automatically turning over piles by gravity. The warehouse comprises a feeding conveying mechanism, storage rooms and a discharging output mechanism. The warehouse is provided with multiple layers of stacked storage rooms. The conveying mechanism is arranged above the storage rooms and is used for feeding and storing materials in the storage rooms. The discharging output mechanism is arranged below the storage rooms, and the materials fall from the storage rooms to the discharging output mechanism and are then output. The bottom of each storage room is provided with a movable baffle. The movable baffle comprises two side flaps and a middle flap. When the materials need to be discharged, the two side flaps are opened to make the materials at the upper end of the storage room fall, and finally the middle flap is opened to make the materials at the middle fall, so that the materials originally at the uppermost end are at the lowermost end, and the materials originally at the middle are at the uppermost end, thereby realizing pile turning over. Through the present application, the spontaneous combustion problem of biomass piles during storage is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of new energy fuel, and more particularly relates to a biomass fuel storage warehouse capable of automatically turning over by gravity. BACKGROUND

[0002] During the process of stacking and storing, the initial heat accumulation caused by the microbial respiration of the biomass fuel will cause the thermal chemical conversion process of the biomass stack, resulting in further temperature rise of the biomass fuel stack and spontaneous combustion of the biomass fuel stack.

[0003] In the process of storing biomass fuel, the direct-fired power plant using biomass as fuel or the coal-fired power plant coupled with biomass combustion tries to avoid the initial heat accumulation of the biomass stack. Specifically, a temperature measuring point is arranged in the biomass stack, and when the temperature of the measuring point exceeds the critical safety temperature, artificial turning over or flat airing is adopted for the large biomass fuel stack to achieve the purpose of cooling and moisture removal. However, the turning over process is time-consuming and laborious, and the flat airing will occupy a large area. In summary, the biomass fuel often faces the problems of natural risk, time-consuming and laborious turning over, and large area occupation during the storage process. SUMMARY

[0004] In view of the above defects or improvement needs of the prior art, the present application provides a biomass fuel storage warehouse capable of automatically turning over by gravity, which solves the problem of spontaneous combustion of the biomass stack during the storage process.

[0005] To achieve the above-mentioned purpose, according to the present application, a biomass fuel storage warehouse capable of automatically turning over by gravity is provided, which comprises a feeding conveying mechanism, a storage room and a discharging output mechanism, wherein:

[0006] A plurality of storage rooms are arranged in the warehouse in a stacked manner, the conveying mechanism is arranged above the storage rooms for inputting and storing materials in the storage rooms, and the discharging output mechanism is arranged below the storage rooms, and the materials fall from the storage rooms to the discharging output mechanism and are output therefrom;

[0007] The bottom of each storage room is provided with a movable baffle, which comprises two side flaps and a middle flap. When the material needs to be discharged, the two side flaps are opened to make the material at the upper end of the storage room fall, and finally the middle flap is opened to make the material in the middle fall, so that the material originally at the uppermost end falls at the lowermost end, and the material originally in the middle falls at the uppermost end, thereby realizing turning over.

[0008] Further preferably, the two side flaps are a hinge four-bar mechanism, and one node of the hinge four-bar mechanism is fixed at the lower end point of the storage room.

[0009] Further preferably, the middle flap is a flat plate, the center of which is fixed to the center of the bottom surface of the storage room, and the middle flap rotates around the center of the bottom surface.

[0010] Further preferably, the opening angle of the two side flaps is 45°-55°, and the opening angle of the middle flap is 45°-60°.

[0011] Further preferably, the middle flap comprises two flat plates, the connecting point of which is fixed to the center of the bottom surface of the storage room, and the two flat plates rotate around the connecting point, respectively.

[0012] Further preferably, the bottom of the storage room is provided with a ventilation fan for heat dissipation.

[0013] Further preferably, a temperature measuring thermocouple is arranged in the storage room for measuring the temperature of the materials in the storage room.

[0014] Overall, compared with the prior art, the above technical solutions conceived by the present application have the following beneficial effects:

[0015] 1. The present application can greatly reduce the problem of large area occupied by biomass fuel caused by horizontal distribution stacking by adopting the upper and lower multi-layer compartment unit to form the layered stacking of biomass fuel in the height direction, and on the other hand, the present application can increase the storage capacity of biomass fuel under the given area.

[0016] 2. The present application uses the temperature measuring point to monitor the safety of the biomass fuel in the storage warehouse, and uses gravity to automatically turn over the baffle to turn over the biomass fuel with over-temperature, which is conducive to realizing the safe storage and automatic management of the biomass fuel.

[0017] 3. The present application uses three or four flap mechanisms to transfer the biomass fuel between the upper and lower layers, which can make the high-temperature biomass fuel at the bottom turn over to the upper area of the compartment after transfer, which is more conducive to cooling and realizes efficient and scientific turning over. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structure schematic diagram of a biomass fuel storage warehouse using gravity automatic turning over constructed according to the preferred embodiment of the present application;

[0019] Figure 2 is a structure schematic diagram of a three-flap mechanism at the bottom surface of the storage room according to the preferred embodiment of the present application;

[0020] Figure 3 is a schematic diagram of the process of transferring the biomass fuel from the upper layer to the lower layer by controlling the closing of the turning over baffle according to the present application;

[0021] Figure 4is a structural diagram of the four-turn plate of the lower bottom of the storage room constructed according to another preferred embodiment of the present application.

[0022] In all the drawings, the same reference signs are used to indicate the same elements or structures, wherein:

[0023] 1 - feed conveying mechanism, 2 - turnover baffle, 3 - biomass fuel, 4 - temperature measuring thermocouple, 5 - ventilation fan, 6 - warehouse main body, 7 - discharge conveying mechanism. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0025] The biomass fuel storage warehouse is composed of a biomass fuel feed conveying mechanism, a turnover baffle, biomass fuel, a temperature measuring thermocouple, a ventilation fan, a warehouse main body, a biomass fuel discharge conveying mechanism and a corresponding automatic control mechanism. The specific implementation is as follows: biomass fuel in the shape of rod, block and particle is conveyed from a low position to the upper part of the warehouse by a biomass fuel feed conveying belt, and then pushed into the upper layer of the warehouse main body by a push plate machine for storage. When the biomass fuel stack in the upper layer of the warehouse generates local high temperature due to heat accumulation, the temperature measuring thermocouple transmits the over-temperature signal in the biomass stack to the turnover control mechanism, which controls the turnover baffle below the compartment to gradually open according to the specified program, and slowly pours the over-temperature biomass in this layer to the next layer of the warehouse. In the pouring process, the ventilation fan arranged transversely between the upper and lower layers of the compartment is opened to form a cross draught to discharge the moisture and heat in the biomass fuel. The transfer sequence of the biomass fuel is: first, the biomass fuel in the middle layer is emptied to the lower layer, then the over-temperature biomass fuel in the upper layer is transferred to the middle layer, and the turnover and cooling are carried out in the process. The biomass fuel in the bottom layer of the warehouse does not need to be cooled after over-temperature, and can be directly conveyed to the boiler by the biomass fuel discharge conveying mechanism for combustion, thereby improving the thermal efficiency of the boiler.

[0026] The application adopts thermocouples to monitor the real-time temperature of the biomass fuel stack, opens the turnover baffle when the internal temperature of the biomass fuel exceeds the installation storage temperature, uses gravity to automatically turn over the biomass fuel, and uses a ventilation fan to discharge the heat and moisture of the biomass fuel, which is beneficial to the safe storage of the biomass fuel. The whole process of the biomass fuel through the conveyor belt to the top layer of the warehouse, from the upper layer of the warehouse to the lower layer, finally unloading in the lower layer, and then through the conveyor belt to the boiler can realize efficient and automatic management. At the same time, the upper and lower arrangement structure of the biomass fuel warehouse is beneficial to saving the storage space of the biomass fuel, and is beneficial to improving the fuel volume ratio of the existing biomass fuel power plant, and improving the safety and stability of the biomass fuel storage process.

[0027] As shown in Figure 1 , a biomass fuel storage warehouse using gravity to automatically turn over, the device comprises 1 biomass fuel feeding conveying mechanism, 2 turnover baffle, 3 biomass fuel, 4 temperature measuring thermocouple, 5 ventilation fan, 6 warehouse main body, 7 biomass fuel discharging conveying mechanism and corresponding automatic control mechanism. Figure 1 The left side of the middle is a side view of the biomass fuel storage warehouse, Figure 1 The right side of the middle is a front view, the biomass fuel storage warehouse uses upper and lower multi-layer compartment units to form layered stacking of biomass fuel in the height direction, uses temperature measuring signal to control the opening of the turnover baffle between layers, uses gravity to slowly transfer the over-temperature biomass fuel from top to bottom, and uses the ventilation fan to discharge excess heat and moisture of the biomass fuel during the transfer process, to realize the safe storage of the biomass fuel.

[0028] Further, the structure of the biomass storage warehouse main body is composed of upper and lower compartment units, a certain space is reserved between the upper and lower compartments for arranging ventilation fans on the front and rear walls of the compartments for convection ventilation, the turnover baffle mechanism is arranged at the bottom of each compartment, and the temperature measuring thermocouple is arranged at the middle part of each compartment. The lower wall of the bottom compartment does not need to add a ventilation fan. As a preferred single compartment, the height is controlled to be 8m or less, and the length and width dimensions of the compartment are controlled to be 12m or less.

[0029] Further, the turnover baffle is controlled by a connecting rod mechanism to open and close, as shown in Figure 2 and 4As shown, the turnover baffle adopts a three-turnover baffle mechanism and a four-turnover baffle mechanism, and as a preferred, the four-turnover baffle mechanism is adopted when the length and width of the compartment are 8-12 m, and the three-turnover baffle mechanism is adopted when the length is less than 8 m. The opening sequence of the turnover baffle is to open the outer turnover baffle first, and then open the middle turnover baffle after part of the biomass fuel is transferred to the lower layer. As a preferred, the opening time of the outer turnover baffle lasts for 5-20 minutes, and the opening angle is 45-55° with the horizontal plane. The turnover time of the middle turnover baffle is 2-5 minutes, and the opening angle is 45-60° with the horizontal plane.

[0030] Figure 3 A schematic diagram for transferring biomass fuel from the upper layer to the lower layer by controlling the closing of the turnover baffle. The compartment units in the upper and lower layers in the warehouse body are simply referred to as the upper layer and the lower layer, respectively. When the temperature of the thermocouple in the upper layer of the warehouse is too high and the biomass fuel needs to be raked to reduce the temperature, and there is sufficient storage space in the lower layer of the warehouse to store the biomass fuel in the upper layer, the biomass fuel can be transferred from the upper layer to the lower layer at this time. The specific implementation process is as follows: first, open the ventilation fan between the upper and lower layers to speed up the heat and moisture removal during the biomass transfer process; then open the outer turnover baffle at the bottom of the upper layer warehouse, so that the biomass fuel with lower temperature at the outer and top positions in the original upper layer warehouse biomass pile is preferentially unloaded on the bottom and middle layers of the lower layer warehouse by gravity, and when the biomass fuel with lower temperature is preferentially transferred to the lower layer warehouse, the biomass fuel still remaining in the upper layer warehouse is the high-temperature biomass fuel in the inner position of the original pile; finally, open the middle turnover baffle, so that the high-temperature biomass fuel remaining in the upper layer warehouse is automatically unloaded on the surface of the lower layer warehouse pile by gravity, and at this time, the high-temperature biomass fuel on the surface can be efficiently and fully dehumidified and cooled under the action of the ventilation fan.

[0031] The following is an example of biomass fuel storage in a certain biomass direct combustion power plant, which can maintain full-load power generation for about a month, and the biomass fuel is stored in the form of a horizontal layout of piles in an open yard, and the size of a single pile is about 100 m long, 15 m wide, and 8 m high. Under this stacking method, the biomass fuel pile often appears high temperature due to rain, and then has to be raked and flattened for drying, and the safety of biomass fuel storage is poor, the raking process is time-consuming and labor-intensive, and occupies a large area. The use of the present application can effectively improve the safety of biomass fuel during storage, and save about 50% of the required land area for biomass fuel storage.

[0032] In this embodiment, the biomass fuel storage warehouse adopts upper and lower multi-layer compartment units to form layered stacking of biomass fuel in the height direction, as shown in Figure 1As shown, the structure of the biomass storage warehouse main body is composed of four layers of compartment units, the interval between the compartments is 9m, 1m space is reserved between the upper and lower layers of compartments for arranging ventilation fans on the front and rear walls of the compartments for convection ventilation, the length and width of a single compartment are both 8m. Temperature measuring thermocouples are arranged at the middle part of each compartment. During the storage process, the biomass fuel is transported to the upper layer of the warehouse by the feeding conveying mechanism, and when the temperature of a certain compartment is too high, the biomass fuel is transferred to the lower layer of the compartment by using the turnover flap mechanism combined with gravity. After the turnover flap is opened, the biomass fuel in the upper layer is slowly transferred from top to bottom by gravity, and in the process of transfer, the ventilation fan is used to turn the biomass fuel and at the same time to exhaust excess heat and moisture, realizing the safe storage of biomass fuel.

[0033] The operation mode of the turnover flap mechanism arranged at the bottom of each layer of compartments is as follows, the turnover flap adopts a three-turnover flap mechanism, as shown in Figure 2 As shown, the three-turnover flap mechanism is divided into outer and inner turnover flaps, the opening sequence of the turnover flap is to open the outer turnover flap first, and then open the middle turnover flap after part of the biomass fuel is fully transferred to the lower layer, the process is as shown in Figure 3 As shown, the opening time of the outer turnover flap lasts for 20 minutes, and the opening angle is 45° with the horizontal plane, the turnover time of the middle turnover flap is 5 minutes, and the opening angle is 60° with the horizontal plane. When the length and width of the warehouse compartment exceed 8m, a four-turnover flap mechanism is needed, as shown in Figure 4 The use of three or four turnover flap mechanisms for transferring biomass fuel between upper and lower layers can make the high-temperature biomass fuel at the bottom turn over to the upper area of the compartment after transfer, which is more conducive to cooling and realizes efficient and scientific turning.

[0034] The lower wall of the lower layer of compartments does not need to be additionally provided with ventilation fans. The biomass fuel in the bottom layer of the warehouse does not need to be cooled after the temperature is too high, and can be directly transported to the boiler by the biomass fuel discharge conveying mechanism for combustion, improving the thermal efficiency of the boiler.

[0035] Those skilled in the art will readily understand that the above is only a preferred embodiment of the present application, and is not intended to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A biomass fuel storage warehouse which is automatically palletized by gravity, characterized in that, The warehouse comprises a feeding conveying mechanism, a storage room and a discharging output mechanism, wherein: The warehouse is provided with a plurality of layers of stacked storage rooms, the conveying mechanism is arranged above the storage rooms for feeding and storing materials in the storage rooms, and the discharging output mechanism is arranged below the storage rooms, and the materials fall from the storage rooms to the discharging output mechanism to be output; The bottom of each storage room is provided with a movable baffle, the movable baffle comprises two side flaps and a middle flap, when the materials need to be discharged, the two side flaps are opened to make the materials at the upper end of the storage room fall, and finally the middle flap is opened to make the middle materials fall, so that the materials originally at the uppermost end are at the lowermost end, and the materials originally in the middle fall to the uppermost end, thereby realizing the turnover of the materials; The middle flap is a flat plate, the center of the middle flap is fixed to the center of the bottom surface of the storage room, and the middle flap rotates around the center of the bottom surface.

2. The biomass fuel storage warehouse which automatically turns over the bales by gravity as claimed in claim 1, wherein, The two side flaps are hinged four-bar mechanisms, one node of the hinged four-bar mechanisms is fixed to the lower end point of the storage room.

3. A biomass fuel storage warehouse which automatically turns over the stacks by gravity as claimed in claim 2, wherein, The opening angle of the two side flaps is 45°-55°, and the opening angle of the middle flap is 45°-60°.

4. The biomass fuel storage warehouse which automatically turns over the bales by gravity as claimed in claim 2, wherein, The middle flap comprises two flat plates, the connecting point of the two flat plates is fixed to the center of the bottom surface of the storage room, and the two flat plates rotate around the connecting point.

5. The biomass fuel storage warehouse that automatically turns over the stacks by gravity as claimed in claim 1, wherein, The bottom of the storage room is provided with a ventilation fan for heat dissipation.

6. The gravity-automatically-stacking biomass fuel storage warehouse according to claim 1, wherein, The storage room is provided with a temperature measuring thermocouple for measuring the temperature of the materials in the storage room.

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