A boiler heat management system for biomass fuel

Abstract

The present invention discloses a boiler heat management system for biomass fuel, belonging to the field of boilers. The boiler heat management system for biomass fuel disclosed by the present invention includes a driving motor, a biomass boiler, and a hot oil circulation mechanism arranged on the biomass boiler. A power input shaft is arranged at the power input end of the hot oil circulation mechanism, and the power input shaft is connected to the power output end of the driving motor. The system further includes a standby power device. A transmission mechanism is detachably connected to the power output end of the driving motor to be connected to the power input shaft during a power outage. The other end of the transmission mechanism is connected to the power output end of the standby power device. After a power outage, the original power input shaft of the equipment can be directly driven to rotate by the standby power device, so as to continue to maintain the hot oil circulation and avoid danger caused by excessive hot oil temperature.

Description

Technical Field

[0001] The present invention relates to the field of boilers, and particularly to a boiler heat management system for biomass fuels. Background Art

[0002] A boiler is an energy conversion device. The energy input into the boiler includes the chemical energy in the fuel and electrical energy. The boiler outputs steam, high-temperature water or organic heat carriers with a certain amount of heat energy. The original meaning of "pot" refers to a water container heated over fire, and "furnace" refers to a place for burning fuel. A boiler includes two main parts: the pot and the furnace. The hot water or steam generated in the boiler can directly provide the required heat energy for industrial production and people's livelihood, or can be converted into mechanical energy through a steam power device, or further converted into electrical energy through a generator. A boiler that provides hot water is called a hot water boiler, which is mainly used for life and has a small amount of application in industrial production. A boiler that generates steam is called a steam boiler, often simply referred to as a boiler, and is mostly used in thermal power plants, ships, locomotives and industrial and mining enterprises. A boiler that uses heat-conducting oil for heating is called a heat-conducting oil boiler. Heat-conducting oil, also known as organic heat carrier or heat medium oil, has a history of more than fifty years in the application as an intermediate heat transfer medium in industrial heat exchange processes, and is widely used in industrial fields that require high temperatures such as petroleum, chemical industry, pharmaceuticals, textile printing and dyeing, light industry, building materials, food, and road asphalt heating. At present, when people heat and take a bath, an atmospheric pressure hot water boiler has been used. The furnace body of this boiler is of an integral structure, mainly composed of an integral boiler shell and a furnace liner arranged therein. There are three horizontal water pipes in the upper, middle and lower layers in the furnace liner. The chimney located above the boiler shell is connected to the furnace liner through a riser pipe. The circulating water in this boiler circulates from bottom to top through the water storage chamber formed between the boiler shell and the furnace liner and the horizontal water pipes communicated with the water storage chamber. Its heating area is small, the water capacity is large, it consumes a lot of coal, and the temperature rise is slow. The combustion flame in the combustion chamber directly irradiates the furnace liner. After the high-temperature flue gas flows upward to heat the horizontal water pipes, it directly enters the chimney and is discharged through the riser pipe. The flue gas flow path is short, the combustion is not sufficient, and a large part of the heat is discharged with the flue gas, resulting in a low thermal efficiency, and the temperature of the discharged flue gas is relatively high, causing energy waste. At the same time, this boiler is also inconvenient to repair. Most of the existing various boiler products are integral, having the disadvantages of low energy utilization rate and relatively serious pollution.

[0003] With the continuous advancement of China's industrialization process, industrial pollution is also intensifying. Some backward boilers with high energy consumption, high energy consumption, and low output are gradually being phased out, and energy-saving and clean boilers are gradually coming into people's view. At present, there are various fuels for boilers, and it has not yet been stabilized which raw material will be the main fuel for boilers in the future. Therefore, at present, multiple energy sources are used for boiler fuels. Many collective units such as factories and schools far from cities still use traditional coal as fuel, while enterprises, institutions, and schools located in or around cities mainly use clean energy, including those using gas, biomass fuel, or anthracite and other energy sources. In traditional boilers, since coal-based boilers are used, the coal-fired devices will bring varying degrees of pollution. At present, energy-saving and clean biomass fuel boilers have gained social favor. However, if energy-saving and clean biomass fuel is used on the original coal boilers, there are problems such as low efficiency and insufficient heat. Therefore, there is an urgent need for a boiler specifically for energy-saving and environmental protection fuels to be matched with it. Biomass pellet fuel is made from all waste crops such as straw, rice straw, firewood, wood chips, peanut shells, sunflower seed shells, beet pulp, and tree bark through processes such as pulverization, mixing, extrusion, and drying, and finally made into pellet fuels. In China, its raw materials are widely distributed and the processing technology is advanced. Biomass pellet fuel is known as green coal and is a clean energy source. As a fuel for boilers, it has a long combustion time, a high temperature in the intensified combustion furnace, and is economical and affordable. At the same time, it has no pollution to the environment, with zero emissions of CO and SO, belongs to renewable energy, can be recycled, and can replace wood, coal, and natural gas. And its operating cost is only half of that of gas. A large amount of raw materials produced in China's agriculture provides strong material support for the popularization of biomass boilers. It can not only solve the problem of farmers burning straw, but also make full use of resources. The ash residue after combustion is a very good fertilizer, which is really a win-win situation. Biomass boilers are a type of boiler. A boiler that uses biomass energy as fuel is called a biomass boiler, which is divided into biomass steam boilers, biomass hot water boilers, biomass hot air furnaces, biomass heat transfer oil furnaces, vertical biomass boilers, horizontal biomass boilers, etc. The boiler adopts the most suitable combustion equipment for biomass fuel combustion - reciprocating grate. In terms of structural design, compared with traditional boilers, the furnace space is relatively large, which is conducive to the full combustion of a large amount of volatile matter instantaneously released during the combustion of biomass fuel. The boiler can be equipped with an oil (gas) ignition burner to achieve automatic ignition. The feeding, combustion, slag removal, water supply, and ignition of the boiler can all adopt automatic control, and the operation is very convenient. The boiler is equipped with an automatic ash cleaning device, which can timely remove the ash on the heating surface of the boiler to ensure the efficient and stable operation of the boiler. A economizer is arranged at the tail of the boiler, and an air preheater can also be arranged according to the needs of users. Compared with traditional boilers, the boiler has higher efficiency and a lower flue gas temperature. The efficiency of biomass boilers is generally above 80%. The larger the boiler model, the more fully it burns, and the higher the efficiency of the boiler.The highest reached 88.3%, which is 15% higher than the average efficiency level of coal-fired boilers.

[0004] Biomass fuel is different from coal. During a power outage, a coal-fired boiler can reduce the intensity of coal combustion by closing the air inlet, but biomass fuel cannot. Closing the air inlet will cause a large amount of black smoke. Therefore, biomass fuel must continue to burn completely during a power outage. For a biomass heat-conducting oil boiler, continuing to heat during a power outage is likely to cause the temperature of the heat-conducting oil to be too high and pose a danger. Summary of the Invention

[0005] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to provide a boiler heat management system for biomass fuel, which can maintain the continuous circulation of the heat-conducting oil boiler after a power outage at a relatively low cost, thereby avoiding the danger caused by overheating of the heat-conducting oil.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A boiler heat management system for biomass fuel provided by the present invention includes a driving motor, a biomass boiler, and a heat-conducting oil circulation mechanism provided on the biomass boiler. A power input shaft is provided at the power input end of the heat-conducting oil circulation mechanism, and the power input shaft is connected to the power output end of the driving motor; a standby power device is further included. A transmission mechanism is detachably connected to the power output end of the driving motor to be connected to the power input shaft during a power outage, and the other end of the transmission mechanism is connected to the power output end of the standby power device.

[0008] The preferred technical solution of the present invention is that the standby power device is a gasoline engine or a diesel engine.

[0009] The preferred technical solution of the present invention is that the transmission mechanism includes a belt pulley and a transmission belt; a connection disk is coaxially provided on the power input shaft, the belt pulley is detachably connected to one side of the connection disk by bolts, one end of the transmission belt is sleeved on the power output end of the standby power device, and the other end of the transmission belt is sleeved on the belt pulley.

[0010] The preferred technical solution of the present invention is that the connection disk includes a first disk body and a second disk body, and the first disk body and the second disk body are coaxially and fixedly connected; the first disk body is fixed on the power output shaft of the driving motor, and the second disk body is sleeved and fixed on the power input shaft.

[0011] Preferably, in the technical solution of the present invention, a through hole is provided in the middle of the pulley disc. When the standby power device is enabled, the pulley disc is fixed to one side of the first disc body. The diameter of the through hole is larger than the diameter of the power output shaft of the drive motor. A connection hole is provided at the end of the drive motor. When the standby power device is not started, the pulley disc is fixed to the connection hole of the drive motor.

[0012] Preferably, in the technical solution of the present invention, an adjusting mechanism fixed to the ground is provided at the bottom of the standby power device to adjust the tightness of the transmission belt.

[0013] Preferably, in the technical solution of the present invention, the adjusting mechanism includes a fixed base and a sliding connection frame; the standby power device is fixed to the sliding connection frame. Support lugs are provided on both sides of the sliding connection frame, guide grooves are provided on both sides of the fixed base, and locking screws are provided on the support lugs, and the locking screws are located in the guide grooves.

[0014] Preferably, in the technical solution of the present invention, an adjusting screw is provided at one end of the sliding connection frame. The adjusting screw is rotatably connected to the sliding connection frame. One end of the adjusting screw passes through the side wall of the fixed base, and the adjusting screw is threadedly connected to the side wall of the fixed base. An adjusting nut is provided on the adjusting screw. When fixing, the adjusting nut is clamped on both sides of the side wall of the fixed base.

[0015] Preferably, in the technical solution of the present invention, a small generator is provided beside the power output disc of the gasoline engine or diesel engine to generate partial electric power by using the excess energy of the power output disc; the biomass boiler is also provided with a state monitoring system, and the small generator is electrically connected to the state monitoring system.

[0016] The beneficial effects of the present invention are as follows:

[0017] A boiler heat management system for biomass fuel provided by the present invention includes a drive motor, a biomass boiler, and a hot oil circulation mechanism provided on the biomass boiler. A power input shaft is provided at the power input end of the hot oil circulation mechanism, and the power input shaft is connected to the power output end of the drive motor; it also includes a standby power device. A transmission mechanism is detachably connected to the power output end of the drive motor to be connected to the power input shaft during a power outage. The other end of the transmission mechanism is connected to the power output end of the standby power device. After a power outage, the original power input shaft of the device can be directly driven to rotate by the standby power device, so as to continue to maintain the hot oil circulation and avoid danger caused by too high hot oil temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the overall structure of the boiler heat management system for biomass fuel provided in the specific embodiment of the present invention;

[0019] Figure 2 It is provided in the specific embodiment of the present invention Figure 1 Schematic diagram of the enlarged structure of part A in

[0020] In the figure:

[0021] 1. Biomass boiler; 2. Driving motor; 3. Backup power device; 4. Adjusting mechanism; 5. Transmission mechanism; 51. Through hole; 52. Belt pulley disc; 53. Transmission belt; 6. Connection disc; 11. State monitoring system; 12. Power input shaft; 21. Connection hole; 41. Sliding connection frame; 42. Fixed base; 43. Adjusting screw; 44. Adjusting nut; 411. Support ear piece; 412. Locking screw; 421. Guide groove; 61. First disc body; 62. Second disc body. Specific embodiment

[0022] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0023] As Figure 1-2 shown, this embodiment provides a boiler heat management system for biomass fuel, including a driving motor 2, a biomass boiler 1, and a hot oil circulation mechanism arranged on the biomass boiler 1. A power input shaft 12 is arranged at the power input end of the hot oil circulation mechanism, and the power input shaft 12 is connected to the power output end of the driving motor 2; it also includes a backup power device 3. A transmission mechanism 5 is detachably connected to the power output end of the driving motor 2 to be connected to the power input shaft 12 during a power outage, and the other end of the transmission mechanism 5 is connected to the power output end of the backup power device 3. The biomass heat-conducting oil furnace heats the heat-conducting oil and then transfers it out to provide heat for other equipment that needs to be heated. After the heat of the heat-conducting oil is consumed, it circulates back for heating. In order to save energy and be convenient to use, the equipment uses the driving motor 2 to drive the power input shaft 12 to rotate. When a power outage occurs, the driving motor 2 stops rotating, so the heat-conducting oil stops circulating, and the heat-conducting oil around the boiler cannot circulate out for cooling, resulting in a continuous increase in temperature and thus easily causing danger. Currently, there are two common methods in this field, which are to use a backup generator. The first method is to supply power to the driving motor 2 through the generator during a power outage. This method has a high cost, the purchase cost of the generator is high, and there is serious waste during energy conversion. The second method is to use an additional oil pump to drive the hot oil to circulate. This method also has a high cost. The present invention adopts an additional transmission mechanism 5 directly connected to the original power input shaft 12, so that the equipment can be maintained at a relatively low cost and the safety of the equipment can be ensured.

[0024] Preferably, the standby power unit 3 is a gasoline engine or a diesel engine. Both engines can provide sufficient power. When the equipment to be driven is large, a diesel engine is preferably used, which can provide sufficient power.

[0025] Preferably, the transmission mechanism 5 includes a pulley disc 52 and a transmission belt 53; a connecting disc 6 is coaxially arranged on the power input shaft 12. The pulley disc 52 is detachably connected to one side of the connecting disc 6 by bolts. One end of the transmission belt 53 is sleeved on the power output end of the standby power unit 3, and the other end of the transmission belt 53 is sleeved on the pulley disc 52. The power output of a gasoline engine or a diesel engine generally uses a belt connection. By setting the pulley disc 52 that can be conveniently disassembled, it can be conveniently connected to a gasoline engine or a diesel engine. The pulley disc 52 can be connected to the connecting disc 6 only when needed, so that when the drive motor 2 drives the power input shaft 12, it does not need to overcome the resistance brought by the pulley disc 52.

[0026] Furthermore, in order to conveniently connect the power output end of the drive motor 2 to the power input shaft 12. The connecting disc 6 includes a first disc body 61 and a second disc body 62, and the first disc body 61 and the second disc body 62 are coaxially and fixedly connected; the first disc body 61 is fixed on the power output shaft of the drive motor 2, and the second disc body 62 is sleeved and fixed on the power input shaft 12. Through the first disc body 61 and the second disc body 62, a rigid connection between the power output end of the drive motor 2 and the power input shaft 12 can be achieved, so that after the transmission belt 53 is laterally connected, the power input shaft 12 can still maintain stable operation. Preferably, a bearing support is arranged at a position where the power input shaft 12 is close to the second disc body 62, so as to stabilize the power input shaft 12.

[0027] Furthermore, a through hole 51 is arranged in the middle of the pulley disc 52. When the standby power unit 3 is enabled, the pulley disc 52 is fixed on one side of the first disc body 61. The diameter of the through hole 51 is larger than the diameter of the power output shaft of the drive motor 2. A connecting hole 21 is arranged at the end of the drive motor 2. When the standby power unit 3 is not started, the pulley disc 52 is fixed on the connecting hole 21 of the drive motor 2. When the standby power unit 3 is not needed, only the pulley disc 52 needs to be fixed at the end of the drive motor 2. Since the diameter of the through hole 51 is larger, it will not affect the power input shaft 12, and the installation is convenient. When it is needed, only the installation position of the pulley disc 52 needs to be switched.

[0028] Preferably, an adjusting mechanism 4 fixed to the ground is provided at the bottom of the standby power device 3 to adjust the tightness of the transmission belt 53. By adjusting the distance between the standby power device 3 and the power input shaft 12, the tightness of the transmission belt 53 can be conveniently adjusted, facilitating disassembly and installation.

[0029] Further, the adjusting mechanism 4 includes a fixed base 42 and a sliding connection frame 41; the standby power device 3 is fixed to the sliding connection frame 41, support lugs 411 are provided on both sides of the sliding connection frame 41, guide grooves 421 are provided on both sides of the fixed base 42, and locking screws 412 are provided on the support lugs 411, and the locking screws 412 are located in the guide grooves 421. The fixed base 42 and the sliding connection frame 41 are cooperatively connected so that the sliding connection frame 41 can only move along the direction close to or away from the power input shaft 12. The setting of the guide grooves 421 can facilitate the selection of the installation position, thereby facilitating the control of the tightness of the transmission belt 53.

[0030] Preferably, an adjusting screw 43 is provided at one end of the sliding connection frame 41. The adjusting screw 43 is rotatably connected to the sliding connection frame 41. One end of the adjusting screw 43 passes through the side wall of the fixed base 42, and the adjusting screw 43 is threadedly connected to the side wall of the fixed base 42. An adjusting nut 44 is provided on the adjusting screw 43. When fixed, the adjusting nut 44 is clamped on both sides of the side wall of the fixed base 42. By means of the adjusting screw 43, the forward or backward movement of the standby power device 3 can be conveniently and accurately adjusted, so that the transmission belt 53 can be adjusted to the optimal transmission tightness, resulting in the highest efficiency. At the same time, due to the cooperation of the locking screw 412 and the guide groove 421, sliding is likely to occur along the length direction of the guide groove 421, so that the tightness of the transmission belt 53 is likely to change during the working process. Through the setting of the adjusting screw 43, the length direction of the guide groove 421 can also be more firmly locked, so that stable operation can be achieved after installation.

[0031] In order to make better use of energy, a small generator is provided beside the power output disc of the gasoline engine or diesel engine. A gear is provided at the edge of the power output disc and then meshes with the gear at the power input end of the small generator for driving. To utilize the excess energy of the power output disc to generate part of the electric power; the biomass boiler 1 is also provided with a state monitoring system 11, and the small generator is electrically connected to the state monitoring system 11. By utilizing the excess kinetic energy to be converted into a part of the electric energy to supply the state monitoring system 11, the running state of the system can be continuously monitored during operation, which is safe and efficient.

[0032] The present invention is described by way of preferred embodiments. Those skilled in the art will appreciate that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of this application belong to the scope of protection of the present invention.

Claims

1. A boiler heat management system for biomass fuel, characterized in that: it includes a driving motor (2), a biomass boiler (1), and a hot oil circulation mechanism arranged on the biomass boiler (1). A power input shaft (12) is provided at the power input end of the hot oil circulation mechanism, and the power input shaft (12) is connected to the power output end of the driving motor (2); it further includes a standby power device (3). A transmission mechanism (5) is detachably connected to the power output end of the driving motor (2) to be connected to the power input shaft (12) during a power outage. The other end of the transmission mechanism (5) is connected to the power output end of the standby power device (3); the standby power device (3) is a gasoline engine or a diesel engine; the transmission mechanism (5) includes a pulley disc (52) and a transmission belt (53). A connection disc (6) is coaxially arranged on the power input shaft (12). The pulley disc (52) is detachably connected to one side of the connection disc (6) by bolts. One end of the transmission belt (53) is sleeved on the power output end of the standby power device (3), and the other end of the transmission belt (53) is sleeved on the pulley disc (52); the connection disc (6) includes a first disc body (61) and a second disc body (62). The first disc body (61) and the second disc body (62) are coaxially and fixedly connected. The first disc body (61) is fixed on the power output shaft of the driving motor (2), and the second disc body (62) is sleeved and fixed on the power input shaft (12); a through hole (51) is arranged in the middle of the pulley disc (52). When the standby power device (3) is enabled, the pulley disc (52) is fixed on one side of the first disc body (61). The diameter of the through hole (51) is larger than the diameter of the power output shaft of the driving motor (2). A connection hole (21) is arranged at the end of the driving motor (2). When the standby power device (3) is not started, the pulley disc (52) is fixed on the connection hole (21) of the driving motor (2); a regulating mechanism (4) fixed to the ground is arranged at the bottom of the standby power device (3) to adjust the tightness of the transmission belt (53).

2. The boiler heat management system for biomass fuel according to claim 1, characterized in that: the regulating mechanism (4) includes a fixed base (42) and a sliding connection frame (41). The standby power device (3) is fixed on the sliding connection frame (41). Support lugs (411) are arranged on both sides of the sliding connection frame (41). Guide grooves (421) are arranged on both sides of the fixed base (42). Locking screws (412) are arranged on the support lugs (411), and the locking screws (412) are located in the guide grooves (421).

3. The boiler heat management system for biomass fuel according to claim 2, characterized in that: One end of the sliding connection frame (41) is provided with an adjusting screw rod (43). The adjusting screw rod (43) is rotatably connected to the sliding connection frame (41). One end of the adjusting screw rod (43) passes through the side wall of the fixed base (42), and the adjusting screw rod (43) is threadedly connected to the side wall of the fixed base (42). An adjusting nut (44) is arranged on the adjusting screw rod (43). When fixed, the adjusting nut (44) is clamped on both sides of the side wall of the fixed base (42).

4. The boiler heat management system for biomass fuel according to claim 1, characterized in that: a small generator is arranged beside the power output disc of the gasoline engine or the diesel engine to generate partial electric power by using the redundant energy of the power output disc; the biomass boiler (1) is further provided with a state monitoring system (11), and the small generator is electrically connected to the state monitoring system (11).

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