A biomass steam boiler with intelligent and precise temperature control and its intelligent temperature control system

Abstract

The present invention belongs to the technical field of steam boilers, and specifically relates to a biomass steam boiler with intelligent and precise temperature control and its intelligent temperature control system. The biomass hot blast stove therein includes a furnace body, and the furnace body includes a combustion chamber, a steam heat exchanger, a feeding box, a feeding pipe, an auger, an air pump unit, and a control box; the combustion chamber is installed at the bottom of the furnace body, and the steam heat exchanger is installed above the combustion chamber in the furnace body; as the spiral blade rotates, the telescopic plate is extruded along the inclined surface of the spiral blade, causing the bottom of the telescopic plate to rise and contract, so as to achieve the purpose of the telescopic plate rubbing against the surface of the spiral blade and the fuel on the surface, until the telescopic plate scrapes the fuel from the top of the spiral blade, realizing the effect of the fuel being scattered on the lower baffle, shaking and breaking part of the fuel. The surface area of the broken fuel increases, and the contact area with air increases, completing more sufficient combustion, improving the combustion efficiency, and thus improving the energy efficiency of the steam heat exchanger.

Description

Technical Field

[0001] The present invention belongs to the technical field of steam boilers, and specifically relates to a biomass steam boiler with intelligent and precise temperature control and its intelligent temperature control system. Background Art

[0002] During the tea processing process, drying is a very crucial step; a hot air stove is a commonly used drying device, and its working principle is to utilize the heat generated by burning fuel. Through a blower unit, hot air is sent into the drying chamber, enabling the tea to gradually lose moisture under the action of the hot air, thereby achieving the purpose of drying.

[0003] The hot air stove mainly consists of a combustion chamber, a heat exchanger, a blower unit, and a control system, etc.; the heat generated by the fuel combustion in the combustion chamber can provide stable and uniform steam through a steam generator, ensuring that the tea is evenly heated during the processing process and fully releasing the aroma and taste of the tea; this not only improves the quality and taste of the tea but also meets the needs of consumers for high-quality tea; the hot air stove can be classified into solid, liquid, and gas according to the fuel. Among solid fuels, such as biomass fuels, which are fuels made from agricultural and forestry waste; the combustion of biomass hot air stoves reduces the generation of toxic and harmful gases, and the carbon dioxide after combustion can be absorbed by plants and converted into new biomass, meeting the requirements of modern environmental protection; and compared with traditional oil-fired and gas-fired hot air stoves, the operating cost of biomass hot air stoves is lower.

[0004] During the use of a biomass hot air stove:

[0005] Unstable fuel quality: The parameters such as moisture content, calorific value, and ash content of biomass fuels fluctuate greatly, resulting in unstable combustion, low thermal efficiency, and even flameout; the differences in fuels from different batches may also cause combustion problems.

[0006] Uneven fuel feeding: Malfunctions or design defects in the feeding system will lead to uneven fuel feeding, causing over-strong or over-weak local combustion, affecting the combustion efficiency and the furnace life.

[0007] Difficult ignition: Excessive moisture content in the fuel or poor fuel quality results in difficult ignition and requires a long startup time. Summary of the Invention

[0008] In order to make up for the deficiencies of the prior art and solve the above technical problems, the present invention proposes a biomass steam boiler with intelligent and precise temperature control and its intelligent temperature control system.

[0009] The technical solution adopted by the present invention to solve its technical problems is as follows: The present invention proposes a biomass steam boiler with intelligent and precise temperature control and its intelligent temperature control system, which includes a furnace body. The furnace body includes a combustion chamber, a steam heat exchanger, a feeding box, a feeding pipe, a screw conveyor, a blower unit and a control box; the combustion chamber is installed at the bottom of the furnace body, and a steam heat exchanger is installed above the combustion chamber in the furnace body. The steam heat exchanger is used for the heat supply and drying work of the hot blast stove; one end of the feeding pipe extends into the combustion chamber, and a feeding box is installed at the other end. A screw conveyor is installed in the feeding pipe; a blower unit and a control box are installed on one side of the furnace body. The blower unit supplies air to the hot blast stove, and the control box is used to control the operation of the hot blast stove; further included are:

[0010] An exhaust duct, the exhaust duct is arranged at the top of the feeding box, and one end of the exhaust duct is communicated with the inside of the feeding box, and the other end is communicated with the suction end of the blower unit; a rotating shaft is rotatably connected in the feeding box, and the rotating shaft is connected to a motor arranged at the top of the feeding box. One end of the rotating shaft is connected to one end of the screw conveyor through a clutch to realize the intermittent rotation of the rotating shaft driving the screw conveyor; a spiral blade is fixedly connected to the rotating shaft, and spiral grooves are evenly opened on the spiral blade. The cross-section of the spiral groove is trapezoidal, and the connecting part between adjacent spiral grooves is sharp. Extrusion holes are evenly arranged in the spiral groove; an upper baffle and a lower baffle are respectively fixedly connected in the feeding box, and the upper baffle is located above the spiral blade, and the lower baffle is close to the bottom of the spiral blade. The rotating shaft penetrates through the upper baffle and the lower baffle, and upper filter holes and lower filter holes are respectively opened on the upper baffle and the lower baffle; a telescopic plate is installed at the bottom of the upper baffle, and the bottom of the telescopic plate rubs against the surface of the spiral blade;

[0011] A combustion plate, the combustion plate is installed in the combustion chamber, and the combustion plate is arc-shaped. An ash pipe is opened at the central position of the combustion plate, and one end of the feeding pipe faces the combustion plate; an ignition component is installed on the combustion plate, and ventilation holes are evenly opened at the top of the combustion plate. The inside of the combustion plate with a hollow structure is communicated with the blower unit through a pipeline.

[0012] Preferably, a plurality of extrusion rods are evenly arranged on one side of the telescopic plate. The extrusion rods are horizontally installed, and a spring is arranged between the extrusion rods and the telescopic plate. The extrusion rods slide into the telescopic plate; one end of the extrusion rod away from the telescopic plate is rotatably connected with an extrusion wheel, and the outer ring of the extrusion wheel contacts the inner wall of the spiral groove; the bottom of the telescopic plate is slidably connected with a lifting rod through a spring. The contact surface between the extrusion rod and the lifting rod is an inclined surface, and the bottom of the lifting rod is hinged with a collection box through a torsion spring; a closed groove is opened at the bottom of the telescopic plate, and the collection box is inserted into the closed groove. A sensor is arranged in the closed groove at the bottom of the telescopic plate; when the extrusion wheel contacts the spiral blade, the lifting rod is pressed to drive the collection box to descend, and the collection box is located between the bottom of the spiral blade and the lower baffle; when the extrusion wheel rises along the spiral blade, the collection box is flipped by the bottom of the spiral blade, and then reset through the torsion spring. The reset collection box is located in the spiral groove.

[0013] Preferably, the outer ring of the extrusion wheel is evenly provided with extrusion blocks, and the cross-section of the extrusion blocks is trapezoidal. The extrusion blocks are inserted into the extrusion holes.

[0014] Preferably, the telescopic plate includes a first plate and a second plate. The first plate with a hollow structure is installed at the bottom of the upper fence plate. The second plate is slidably connected to the bottom of the first plate through a spring. The extrusion rod, the extrusion wheel, the lifting rod, the collection box and the sealed groove are located on the second plate. A jet pipe is provided inside the second plate, one end of the jet pipe faces the sensor, and the other end communicates with the inside of the first plate. A chute is opened at the bottom of the second plate, and a sliding rod is slidably connected in the chute. One end of the sliding rod is located in the chute, and the other end is connected to the lifting rod. A cleaning sleeve is provided at the end of the sliding rod away from the lifting rod, and a cleaning cloth is provided inside the cleaning sleeve. The sensor is located at the center of the cleaning sleeve. When the cleaning sleeve descends, the cleaning sleeve covers the sensor.

[0015] Preferably, a grille plate is rotatably connected to the bottom of the upper fence plate, and a torsion spring is provided between the grille plate and the upper fence plate. A guide block is provided on one side of the second plate, and a guide rod is provided at the bottom of the grille plate. The bottom of the guide rod contacts the wavy surface of the guide block. The holes in the upper filter holes and the grille plate form an overall inverted trapezoidal hole.

[0016] Preferably, a hydraulic tank is provided inside the second plate, and a hydraulic disc is slidably connected to the top of the hydraulic tank through a spring. Combustion-supporting agent is stored in the hydraulic tank. A nozzle is provided on the hydraulic tank, and the nozzle faces the fuel. An electric push rod is provided on the inner wall of the first plate away from the second plate, and the telescopic end of the electric push rod is directly above the hydraulic disc.

[0017] Preferably, an extrusion plate is provided at the bottom of the spiral blade, and one end of the extrusion plate is inclined towards and contacts the surface of the lower fence plate. The bottom of the extrusion plate is slidably connected to a dredging rod through a spring, and the bottom of the dredging rod is inserted into the lower filter hole.

[0018] Preferably, a combustion net is provided above the combustion plate, and a rotating shaft is rotatably connected to the center position of the combustion plate. The rotating shaft is connected to a motor provided at the bottom of the furnace body. The rotating shaft is evenly provided with rakes. Among the upper and lower adjacent rakes, the bottom of the upper rake contacts the combustion net, and the bottom of the lower rake contacts the combustion plate.

[0019] Preferably, the combustion plate is evenly provided with protrusions, and the bottom of the rake contacts the protrusions.

[0020] An intelligent temperature control system applicable to a biomass hot blast stove, the intelligent temperature control system includes a collection module, a data processing module and a control module;

[0021] The collection module, the collection module is installed in the furnace body and is used for collecting the temperature of the combustion chamber, the flow rate of the feed pipe and the value of the steam heat exchanger;

[0022] The data processing module is responsible for receiving the data uploaded by the acquisition module and performing data preprocessing and analysis;

[0023] The control module controls the working state of the furnace body according to the analysis result of the data processing module and the set execution commands.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. For the biomass steam boiler with intelligent precise temperature control and its intelligent temperature control system described in the present invention, the proportion of moisture inside the fuel agglomerates is large, making it difficult to ignite or affecting combustion. The fuel agglomerates are intercepted by the upper filter holes at the top of the upper baffle, and the remaining fuel passes through the upper baffle and the upper filter holes and falls on the lower baffle, separating the agglomerates in the fuel, ensuring smooth ignition, avoiding excessive moisture in the fuel, improving the smoothness of ignition, and thus improving the combustion effect of the biomass hot blast stove.

[0026] 2. For the biomass steam boiler with intelligent precise temperature control and its intelligent temperature control system described in the present invention, as the spiral blade rotates, the telescopic plate is squeezed along the inclined surface of the spiral blade, causing the bottom of the telescopic plate to rise and contract, achieving the purpose of the telescopic plate rubbing against the surface of the spiral blade and the fuel on the surface, until the telescopic plate scrapes the fuel off the top of the spiral blade, realizing the effect of the fuel being scattered on the lower baffle, shaking and breaking some of the fuel. The surface area of the broken fuel increases, and the contact area with air enlarges, completing more sufficient combustion, and thus improving the combustion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 is the perspective view of the present invention;

[0029] Figure 2 is the schematic diagram of the internal structure of the present invention;

[0030] Figure 3 is the schematic diagram of the internal structure of the combustion chamber;

[0031] Figure 4 is the schematic diagram of the internal structure of the feeding box;

[0032] Figure 5 is the state diagram when the front part of the spiral blade passes through the telescopic plate;

[0033] Figure 6 is the state diagram when the rear part of the spiral blade passes through the telescopic plate;

[0034] Figure 7 is the state diagram when the spiral blade passes through the telescopic plate and the grille plate rotates at the bottom of the upper baffle;

[0035] Figure 8 This is a diagram of the state where the end of the collection box that contacts the spiral blade is flipped;

[0036] Figure 9 This is the state diagram after the collection box passes one end of the spiral blade;

[0037] Figure 10 This is a state diagram of the cleaning sleeve driving the cleaning cloth to wipe the sensor up and down;

[0038] In the figure: furnace body 1, combustion chamber 11, steam heat exchanger 12, feeding box 13, feeding pipe 14, auger 15, air pump unit 16, control box 17, exhaust pipe 18, rotating shaft 2, motor 21, spiral blade 22, spiral groove 23, extrusion hole 24, upper fence 25, lower fence 26, upper filter hole 27, lower filter hole 28, telescopic plate 29, combustion plate 3, furnace ash pipe 31, ignition assembly 32, vent hole 33, extrusion rod 34, extrusion Pressure wheel 35, lifting rod 36, collection box 37, sealed groove 38, sensor 39, extrusion block 4, plate No. 1 41, plate No. 2 42, air injection tube 43, slide 44, slide rod 45, cleaning sleeve 46, grille plate 5, guide block 51, guide rod 52, hydraulic tank 53, hydraulic disc 54, nozzle 55, electric push rod 56, extrusion plate 57, dredging rod 58, combustion net 6, rotating shaft 61, motor 62, rake 63, protrusion 64. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings shown 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.

[0040] Example 1:

[0041] An intelligent and precise temperature-controlled biomass hot air furnace, as shown in the accompanying drawings of the specification Figures 1 - 10 As shown, it includes a furnace body 1, which includes a combustion chamber 11, a steam heat exchanger 12, a feeding box 13, a feeding pipe 14, an auger 15, an air pump unit 16 and a control box 17; the combustion chamber 11 is installed at the bottom of the furnace body 1, and a steam heat exchanger 12 is installed above the combustion chamber 11 in the furnace body 1, and the steam heat exchanger 12 is used for heating and drying work of the hot blast furnace; one end of the feeding pipe 14 extends into the combustion chamber 11, and the other end is installed with the feeding box 13, and the auger 15 is installed in the feeding pipe 14; the bottom and one side of the furnace body 1 are respectively installed with an air pump unit 16 and a control box 17, the air pump unit 16 supplies air to the hot blast furnace, and the control box 17 is used to control the operation of the hot blast furnace; the bottom of the feeding box 13 is connected to the top of the furnace body through an air pipe;

[0042] The combustion chamber 11, steam heat exchanger 12, feeding box 13, feed pipe 14, auger 15, air pump unit 16 and control box 17 are components in a conventional hot blast stove. The air pump unit 16 is a combined unit of a conventional blower, exhaust fan and flue gas filter, such as a device composed of a blower, exhaust fan and flue gas filter arranged side by side, which has the effects of conveying fresh air into the combustion chamber 11, sucking in flue gas and filtering flue gas; the staff adds fuel into the feed pipe 14 through the feeding box 13, the auger 15 conveys the fuel in the feed pipe 14 into the combustion chamber 11, the air pump unit 16 conveys air into the combustion chamber 11 to promote the combustion of the fuel in the combustion chamber 11, and the generated heat heats the steam heat exchanger 12 to fully displace a large amount of calorific value in the steam, which is used to heat water or air. The heated water or air is centrally conveyed to the drying chamber. The air pump unit 16 sucks air into the feeding box 13, the feeding box 13 extracts the high-temperature waste gas after passing through the steam heat exchanger 12, and after cooling through the exhaust pipe 18, it is filtered and discharged through the flue gas filter in the air pump unit 16 to complete the normal operation of the hot blast stove; the steam heat exchanger 12 can provide stable and uniform steam to ensure that the tea is evenly heated during the processing process and fully release the aroma and taste of the tea;

[0043] It further includes:

[0044] An exhaust pipe 18, the exhaust pipe 18 is arranged on the top of the feeding box 13, and one end of the exhaust pipe 18 is communicated with the inside of the feeding box 13, and the other end is communicated with the air suction end of the air pump unit 16; a rotating shaft 2 is rotatably connected in the feeding box 13, the rotating shaft 2 is connected to a motor 21 arranged on the top of the feeding box 13, and one end of the rotating shaft 2 is connected to one end of the auger 15 through a clutch, so that the rotating shaft 2 drives the auger 15 to rotate intermittently; a spiral blade 22 is fixedly connected to the rotating shaft 2, and spiral grooves 23 are uniformly opened on the spiral blade 22. The cross section of the spiral groove 23 is trapezoidal, and the connecting part between adjacent spiral grooves 23 is sharp. Extrusion holes 24 are uniformly arranged in the spiral groove 23; an upper baffle 25 and a lower baffle 26 are respectively fixedly connected in the feeding box 13, the upper baffle 25 is located above the spiral blade 22, the lower baffle 26 is close to the bottom of the spiral blade 22, the rotating shaft 2 penetrates through the upper baffle 25 and the lower baffle 26, and upper filter holes 27 and lower filter holes 28 are respectively opened on the upper baffle 25 and the lower baffle 26; a telescopic plate 29 is installed at the bottom of the upper baffle 25, and the bottom of the telescopic plate 29 rubs against the surface of the spiral blade 22;

[0045] The motor 21 is a conventional driving device. The motor 21 drives the rotating shaft 2 to rotate, and the rotating shaft 2 drives the auger 15 to rotate through a conventional clutch. When fuel supply is not required, the clutch disconnects the connection between the rotating shaft 2 and the auger 15, achieving the purpose that the rotating shaft 2 rotates while the auger 15 remains stationary. When fuel supply is needed, the clutch reconnects the rotating shaft 2 and the auger 15 to complete the drive switching operation. When the telescopic plate 29 is stationary, the bottom of the telescopic plate 29 is close to the lower railing plate 26.

[0046] The combustion plate 3 is installed in the combustion chamber 11, and the combustion plate 3 is arc-shaped. A furnace ash pipe 31 is provided at the axial center position of the combustion plate 3, and one end of the feed pipe 14 faces the combustion plate 3. An ignition component 32 is installed on the combustion plate 3, and ventilation holes 33 are evenly arranged at the top of the combustion plate 3. The inside of the combustion plate 3 with a hollow structure is communicated with the air pump unit 16 through a pipeline. The ignition component 32 is a device commonly used for ignition in a hot blast stove.

[0047] Specific working process: When the hot blast stove is working, the staff adds biomass fuel into it by opening the top of the feeding box 13. If there are large lumps formed in the biomass fuel due to factors such as moisture, the moisture content in the fuel lumps is high, making it difficult to ignite or affecting combustion. The fuel lumps are intercepted on the top of the upper railing plate 25 by the upper filter holes 27, and the remaining fuel passes through the upper railing plate 25 and the upper filter holes 27 and falls on the lower railing plate 26, separating the lumps in the fuel, ensuring smooth ignition, avoiding excessive moisture in the fuel, improving the smoothness of ignition, and thus improving the combustion effect of the biomass hot blast stove.

[0048] After the fuel falls on the lower railing plate 26, the motor 21 drives the rotating shaft 2 to rotate. At this time, the rotating shaft 2 is disconnected from the auger 15 through the clutch, so that the rotating shaft 2 rotates while the auger 15 remains stationary. The rotating shaft 2 drives the spiral blade 22 to rotate. During the rotation of the spiral blade 22, the fuel on the lower railing plate 26 is continuously shoveled onto the spiral blade 22, and then the spiral blade 22 drives the fuel to rotate and contact the bottom of the telescopic plate 29. As the spiral blade 22 rotates, the telescopic plate 29 is squeezed along the inclined surface of the spiral blade 22, causing the bottom of the telescopic plate 29 to rise and contract, achieving the purpose that the telescopic plate 29 rubs against the surface of the spiral blade 22 and the fuel on the surface, until the telescopic plate 29 scrapes the fuel off the top of the spiral blade 22, realizing the effect of fuel sprinkling on the lower railing plate 26, shaking and breaking part of the fuel. The surface area of the broken fuel increases, and the contact area with the air increases, completing more sufficient combustion, thereby improving the combustion efficiency.

[0049] Since the connecting parts of adjacent spiral grooves 23 are sharp, when the fuel is pushed along the surface of the spiral blade 22 by the telescopic plate 29, small fuel fragments are crushed by the mutual extrusion of the sharp parts of the spiral groove 23 and the telescopic plate 29, improving the crushing effect of the fuel, enhancing the combustion effect of the fuel, increasing the energy efficiency of the steam heat exchanger, and thus improving the combustion effect of the hot blast stove; moreover, some of the fuel can also pass through the spiral blade 22 through the extrusion holes 24 under the extrusion of the telescopic plate 29, reducing the volume of the fuel, improving the crushing efficiency, accelerating the effect of the fuel entering the combustion chamber 11 through pretreatment, ensuring sufficient supply during fuel combustion, and thus improving the combustion efficiency;

[0050] After the fuel is crushed, it passes through the lower filter holes 28 and through the lower baffle 26 into the feed pipe 14; when ignition or supply is required, the rotating shaft 2 and the auger 15 are reconnected through the clutch, the rotating shaft 2 drives the auger 15 to rotate, and the auger 15 rotates to convey the fuel in the feed pipe 14 to the surface of the combustion plate 3 away from the center; then the fuel is ignited by the ignition assembly 32, and the air pump unit 16 supplies air for combustion support around the fuel through the ventilation holes 33 to improve the combustion effect; when the fuel is poured onto the combustion plate 3, since the combustion plate 3 is arc-shaped, it avoids the fuel from spilling from the combustion plate 3; after the fuel burns, the staff opens the furnace body 1 and clears the burnt slag on the combustion plate 3 through the ash pipe 31;

[0051] Furthermore, during the combustion process in the combustion chamber 11, smoke is generated. The air pump unit 16 sucks air into the feeding box 13 through the suction pipe 18, and the feeding box 13 sucks the smoke into the furnace body 1 through the air pipe, preventing the smoke from spreading around the hot blast stove and polluting the environment; the temperature of the smoke generated during fuel combustion is relatively high. After the feeding pipe 14 sucks the smoke into the feeding box 13, the high-temperature smoke moves upward from bottom to top in the feeding box 13, and the fuel in the feeding box 13 moves downward from top to bottom, enabling the high-temperature smoke to fully preheat and dry the fuel in the feeding box 13. While achieving energy conservation through the reuse of high-temperature waste gas, it is more conducive to subsequent combustion and improves the combustion effect; in addition, the fuel on the lower baffle 26 has a small volume and is about to be conveyed into the feed pipe 14, while the fuel on the upper baffle 25 has a large volume and can temporarily store the pretreatment. That is, the fuel fragments on the lower baffle 26 have a small volume, a fast preheating and drying efficiency, and come into contact with the high-temperature smoke; during the fuel sprinkling process, they come into contact with the high-temperature smoke again for preheating and drying; the fuel lumps on the upper baffle 25 have a large volume and a slow preheating and drying efficiency. After the high-temperature smoke contacts the fuel on the lower baffle 26 and the fuel during the sprinkling process, it then contacts the fuel on the upper baffle 25, enabling the fuel in the feeding box 13 to be separately processed before combustion, improving the processing effect of the fuel, thus enhancing the combustion effect of the fuel, increasing the energy efficiency of the steam heat exchanger, and further improving the combustion effect of the hot blast stove.

[0052] Embodiment 2:

[0053] On the basis of the first embodiment, a plurality of extrusion rods 34 are evenly arranged on one side of the telescopic plate 29. The extrusion rods 34 are horizontally installed, and a spring is provided between the extrusion rods 34 and the telescopic plate 29. The extrusion rods 34 slide into the telescopic plate 29; one end of the extrusion rod 34 far away from the telescopic plate 29 is rotatably connected with an extrusion wheel 35, and the outer ring of the extrusion wheel 35 contacts the inner wall of the spiral groove 23; the bottom of the telescopic plate 29 is slidably connected with a lifting rod 36 through a spring. The contact surface between the extrusion rod 34 and the lifting rod 36 is an inclined surface, and a collecting box 37 is hinged at the bottom of the lifting rod 36 through a torsion spring; a closed groove 38 is formed at the bottom of the telescopic plate 29, and the collecting box 37 is inserted into the closed groove 38. A sensor 39 is arranged in the closed groove 38 at the bottom of the telescopic plate 29; when the extrusion wheel 35 contacts the spiral blade 22, the lifting rod 36 is pressed to drive the collecting box 37 to descend, and the collecting box 37 is located between the bottom of the spiral blade 22 and the lower baffle 26; when the extrusion wheel 35 rises along the spiral blade 22, the collecting box 37 is flipped by the bottom of the spiral blade 22 and then reset through the torsion spring. The reset collecting box 37 is located in the spiral groove 23; the sensor 39 is a conventional electrical appliance for detecting humidity, and the selected sensor 39 is not affected by the temperature in the feeding box 13;

[0054] A plurality of extrusion blocks 4 are evenly arranged on the outer ring of the extrusion wheel 35, and the cross section of the extrusion block 4 is trapezoidal. The extrusion block 4 is inserted into the extrusion hole 24;

[0055] The telescopic plate 29 includes a first plate 41 and a second plate 42. The first plate 41 with a hollow structure is installed at the bottom of the upper baffle 25. The second plate 42 is slidably connected to the bottom of the first plate through a spring. The extrusion rod 34, the extrusion wheel 35, the lifting rod, the collecting box 37 and the closed groove 38 are located on the second plate 42; a jet pipe 43 is arranged in the second plate 42, one end of the jet pipe 43 faces the sensor 39, and the other end communicates with the inside of the first plate 41; a sliding groove 44 is formed at the bottom of the second plate 42, and a sliding rod 45 is slidably connected in the sliding groove 44. One end of the sliding rod 45 is located in the sliding groove 44, and the other end is connected to the lifting rod 36; a cleaning sleeve 46 is arranged at the end of the sliding rod 45 far away from the lifting rod 36, and a cleaning cloth is arranged in the cleaning sleeve 46. The sensor 39 is located at the center of the cleaning sleeve 46; when the cleaning sleeve 46 descends, the cleaning sleeve 46 covers the sensor 39; the cleaning cloth is a conventional tool for cleaning the sensor 39, and the acting force of the jet pipe 43 jetting air on the sensor 39 will not affect the fuel sample collected by the collecting box 37;

[0056] Specific working process: when the telescopic plate 29 is stationary, the bottom of the telescopic plate 29 is close to the lower railing 26, and the squeezing rod 34 is affected by the spring to drive the squeezing wheel 35 away from the telescopic plate 29, and the lifting rod 36 is affected by the spring to drive the collection box 37 to insert into the closed groove 38, and the sensor 39 is located in the internal environment of the collection box 37; when the spiral blade 22 rotates and approaches the telescopic plate 29, the spiral groove 23 contacts and squeezes the squeezing wheel 35, and the squeezing wheel 35 drives the squeezing rod 34 to insert into the telescopic plate 29; the inclined surface at one end of the squeezing rod 34 contacts and squeezes the inclined surface at the top of the lifting rod 36, and after being squeezed, the lifting rod 36 drives the collection box 37 to descend and break away from the closed groove 38, so that the collection box 37 descends between the bottom of the spiral blade 22 and the lower railing 26, so that the collection box 37 can collect fuel after the squeezing wheel 35 is squeezed;

[0057] As the spiral blade 22 moves, the bottom of the spiral blade 22 contacts and moves the collection box 37. After being moved, the collection box 37 swings and flips with the hinge position as the rotation point, so that the fuel sample in the collection box 37 is poured out to prepare for collecting a new sample. Until the collection box 37 passes the bottom of the spiral blade 22, the collection box 37 is affected by the torsion spring and swings back to its original position. After the reset, the collection box 37 is close to the inner wall of the spiral groove 23; then the spiral blade 22 continues to rotate, and the telescopic plate 29 rises and retracts. During the process of rising along the spiral groove 23, the collection box 37 scrapes the inner wall of the spiral groove 23 to prevent wet fuel from adhering to form nodules and hindering the spiral blade 22 from shoveling the fuel for throwing, thereby improving the movement effect of the fuel and thus improving the fuel processing effect; while cleaning the spiral groove 23 and the spiral blade 22, the collection box 37 completes the work of collecting a new fuel sample;

[0058] When the telescopic plate 29 passes over the spiral blade 22, the squeezing wheel 35 is no longer squeezed, driving the squeezing rod 34 to extend out of the telescopic plate 29, and the lifting rod 36 drives the collection box 37 containing the fuel to rise and insert into the closed groove 38, so that the fuel in the collection box 37 is in close contact with the sensor 39. The sensor 39 performs humidity detection on the fuel in the collection box 37 to complete the moisture measurement before the fuel is burned, so that the staff can grasp the moisture content of the fuel in real time, ensure that the fuel is burned completely, and improve the combustion effect of the hot blast stove; because the collection box 37 is tested when it is inserted into the closed groove 38, the collection box 37 remains closed during the test, reducing the influence of the environment in the feeding box 13 on the test results, thereby improving the test accuracy; the hot blast stove determines whether the fuel in the feeding box 13 can be transported according to the fuel moisture content detection data, thereby reducing the influence of the water content in the fuel on the combustion process;

[0059] After the spiral groove 23 extrudes the extrusion wheel 35, the extrusion wheel 35 drives the extrusion block 4 to roll and rise in the spiral groove 23; when the extrusion wheel 35 rolls close to the extrusion hole 24, the extrusion wheel 35 drives the extrusion block 4 to insert into the extrusion hole 24. While dredging the extrusion hole 24, the process of the extrusion block 4 rolling and inserting into the extrusion hole 24 forms a process of a gear rolling on a rack, achieving an engagement effect. By inserting into the extrusion hole 24, the extrusion wheel 35 is prompted to roll in the spiral groove 23; the fuel fragments at the angle between the spiral blade 22 and the telescopic plate 29 are crushed by the rolling extrusion block 4 in the rotating state, improving the crushing effect of the fuel fragments. At the same time, due to the role of the extrusion hole 24 in prompting the extrusion wheel 35 to roll in the spiral groove 23, the situation where the extrusion wheel 35 is stuck by the fuel during the crushing process is avoided, improving the crushing efficiency;

[0060] When the telescopic plate 29 rises and contracts, the second plate 42 contracts into the first plate 41. The air in the first plate 41 is squeezed and continuously jets air towards the sensor 39 through the air jet pipe 43, blowing away the fuel adhered to the sensor 39 to keep it clean, maintaining the cleanliness of the sensor 39 and the detection accuracy of the sensor 39; when the sampling box 37 samples, the lifting rod 36 drives the cleaning sleeve 46 to descend through the sliding rod 45 in the sliding groove 44, and the cleaning sleeve 46 drives the cleaning cloth to descend past the sensor 39 to clean the sensor 39, and cooperate with the continuous air jet of the air jet pipe 43 to blow away the impurities generated by the cleaning, improving the cleaning effect and maintaining the detection accuracy of the sensor 39, so as to accurately detect the water content of the fuel and improve the combustion effect of the hot blast stove.

[0061] Embodiment Three:

[0062] On the basis of Embodiment Two, the bottom of the upper railing 25 is rotatably connected with a grille plate 5, and a torsion spring is provided between the grille plate 5 and the upper railing 25; a guiding block 51 is provided on one side of the second plate 42, a guiding rod 52 is provided at the bottom of the grille plate 5, and the bottom of the guiding rod 52 contacts the wavy surface of the guiding block 51; the upper filter holes 27 and the holes in the grille plate 5 form a whole inverted trapezoidal hole;

[0063] A hydraulic tank 53 is provided in the second plate 42, and a hydraulic disc 54 is slidably connected to the top of the hydraulic tank 53 through a spring. The hydraulic tank 53 stores a combustion improver, a nozzle 55 is provided on the hydraulic tank 53, and the nozzle 55 faces the fuel; an electric push rod 56 is provided on the inner wall of the first plate 41 away from the second plate 42, and the telescopic end of the electric push rod 56 is directly above the hydraulic disc 54; the combustion improver is the grease commonly used for the combustion of the hot blast stove; the hydraulic tank 53 contains a nozzle for one-way air extraction. After the hydraulic disc 54 descends to squeeze out the combustion improver in the hydraulic tank 53, the hydraulic disc 54 rises and resets under the influence of the spring, and the hydraulic tank 53 sucks air from the outside through the nozzle to balance the air pressure difference after the combustion improver is squeezed out in the hydraulic tank 53; the electric push rod 56 is a conventional electric-driven telescopic device;

[0064] The bottom of the spiral blade 22 is provided with an extrusion plate 57, and one end of the extrusion plate 57 is inclined toward and contacts the surface of the lower fence 26; the bottom of the extrusion plate 57 is slidably connected to a dredging rod 58 through a spring, and the bottom of the dredging rod 58 is inserted into the lower filter hole 28;

[0065] Specific working process: When the second plate 42 rises and retracts into the first plate 41, the second plate 42 drives the guide block 51 to rise, and the wavy surface on one side of the guide block 51 contacts the guide rod 52;

[0066] When the guide rod 52 contacts the wavy raised portion of the guide block 51, an extrusion effect is generated on the guide rod 52, pushing the guide rod 52 away from the second plate 42. The guide rod 52 drives the grid plate 5 to rotate, so that the holes on the grid plate 5 are staggered with the upper filter holes 27. During the process of staggering the holes on the grid plate 5 and the upper filter holes 27, a shearing effect is generated, gradually shearing and crushing the fuel agglomerates stuck in the upper filter holes 27, so that the fuel agglomerates are sheared and crushed to reduce their volume while being dried by high-temperature smoke, thereby improving the drying efficiency and thus improving the combustion pretreatment efficiency.

[0067] When the guide rod 52 contacts the wavy concave portion of the guide block 51, the guide rod 52 is no longer squeezed, and the torsion spring in the grid plate 5 drives the grid plate 5 and the guide rod 52 to reset. The guide rod 52 moves closer to the second plate 42. When the holes on the grid plate 5 overlap with the upper filter holes 27 again, the guide rod 52 collides with the guide block 51 and vibrates, causing the remaining fuel agglomerates on the upper fence 25 to fall again and get stuck in the upper filter holes 27, ready for further shearing and crushing, until the large-volume fuel agglomerates are sheared and crushed to pass through the upper filter holes 27.

[0068] Before the hot blast furnace is ignited, since the amount of high-temperature smoke generated is small or has not yet been burned, if the water content of the fuel at this time is relatively high, the control box 17 controls the electric push rod 56 to extend to a set length through the furnace body 1, and the No. 2 plate 42 rises, driving the hydraulic disc 54 to rise. The hydraulic disc 54 is blocked after contacting the electric push rod 56 and stops rising. The No. 2 plate 42 then drives the hydraulic tank 53 to continue rising, squeezing the combustion aid out of the hydraulic tank 53 through the nozzle 55. The combustion aid is sprayed into the fuel through the nozzle 55, and is thrown and crushed by the spiral blade 22, so that the combustion aid and the fuel are evenly mixed, thereby improving the combustion uniformity when the hot blast furnace is just burning, thereby improving the combustion effect;

[0069] The rotation of the spiral blade 22 drives the rotation of the extrusion plate 57, and the extrusion plate 57 drives the rotation of the dredging rod 58. When the dredging rod 58 approaches the lower filter hole 28, it elongates under the influence of the spring and inserts into the lower filter hole 28. While dredging the lower filter hole 28, the extrusion plate 57 scrapes and cleans the surface of the lower baffle 26, preventing the fuel mixed with the combustion promoter from being sticky and adhering to the surface of the lower baffle 26, improving the cleaning degree of the lower baffle 26, and ensuring the filtering capacity and throughput of the fuel. When the extrusion plate 57 drives the dredging rod 58 past the lower filter hole 28, the arc surface at the bottom of the dredging rod 58 inserted into the lower filter hole 28 slides with the lower filter hole 28, and the dredging rod 58 is pushed upward until the dredging rod 58 crosses the lower filter hole 28, completing one dredging operation of the dredging rod 58 on the lower filter hole 28.

[0070] Embodiment 4:

[0071] Based on Embodiment 3, a combustion net 6 is provided above the combustion plate 3, and a rotating shaft 61 is rotatably connected to the center position of the combustion plate 3. The rotating shaft 61 is connected to a motor 62 provided at the bottom of the furnace body 1. The rotating shaft 61 is evenly provided with rakes 63. Among the rakes 63 adjacent to each other up and down, the bottom of the upper rake 63 contacts the combustion net 6, and the bottom of the lower rake 63 contacts the combustion plate 3. The motor 62 is a conventional device for driving the rotation of components, and since the motor 62 is located at a relatively far position below the combustion plate 3, the motor 62 is prevented from being affected by the combustion.

[0072] The combustion plate 3 is evenly provided with protrusions 64, and the bottom of the rake 63 contacts the protrusions 64.

[0073] Specific working process: After the fuel is crushed, it will form fuel fragments and powders. The combustion of these two states of fuel may cause uneven temperature distribution in the hot blast stove. Therefore, when the fuel is transported and burned, the fuel first falls on the combustion net 6. The motor 62 drives the rake 63 to rotate through the rotating shaft 61. The rake 63 stirs the fuel on the combustion net 6. The powder generated during the crushing of the fuel passes through the combustion net 6 and falls on the combustion plate 3 for combustion, while the fuel fragments remain on the combustion net 6 for combustion, achieving the purpose of stratified combustion and improving the combustion effect. Moreover, the fuel fragments are supported on the combustion plate 3 by the combustion net 6 and burned, cooperating with the air supply from bottom to top through the vent holes 33 to improve the combustion effect.

[0074] After the fuel fragments are burned into ashes and pulverized, they fall onto the surface of the combustion plate 3 through the combustion net 6. When the air vent holes 33 blow air upward for air supply, the ashes on the combustion plate 3 are avoided, preventing the air flow from blowing up and diffusing the ashes on the combustion plate 3, which affects the subsequent combustion effect. Moreover, while the rake 63 stirs the fuel fragments on the combustion net 6, it also stirs the ashes on the combustion plate 3. On the one hand, when the fuel is stirred, the originally tightly packed fuel is dispersed, increasing the contact area between the fuel and oxygen, which helps oxygen to penetrate more fully into the fuel, thus accelerating combustion. On the other hand, when stirring the ashes, in cooperation with the arc-shaped combustion plate 3, the ashes are guided and converge towards the ash pipe 31 in the center of the combustion plate 3 and fall out for discharge, timely cleaning the ashes and preventing the ashes from being blown up and diffused.

[0075] During the rotation of the rake 63, the rake 63 generates a vibration effect when passing through the protrusion 64, causing the rake 63 and the combustion plate 3 to vibrate. The self-vibration of the combustion plate 3, the arc-shaped top, and the stirring of the rake 63 accelerate the discharge of the ashes, achieving the purpose of timely cleaning the ashes. And because both the combustion plate 3 and the combustion net 6 are made of metal and are rigidly connected to each other, the vibration of the combustion plate 3 drives the combustion net 6 to form a slight vibration. The vibration of the combustion net 6 vibrates the combustion fragments, causing the combustion fragments to be broken while burning, accelerating combustion and facilitating the ashes after combustion to pass through the combustion net 6, thereby improving the convenience of using the hot blast stove.

[0076] Example Five:

[0077] An intelligent temperature control system applicable to a biomass hot blast stove, the intelligent temperature control system includes a collection module, a data processing module, and a control module;

[0078] The collection module is installed inside the furnace body 1 and is used to collect the temperature of the combustion chamber 11, the flow rate of the feed pipe 14, and the value of the steam heat exchanger 12. The flow rate of the feed pipe 14 is counted by a flow meter commonly used for detecting solids;

[0079] The data processing module is responsible for receiving the data uploaded by the collection module and performing data preprocessing and analysis;

[0080] The control module controls the working state of the furnace body 1 according to the analysis result of the data processing module and based on the set execution command;

[0081] When the temperature of the combustion chamber 11 is low, it indicates that the combustion fire is small. The flow rate of the feed pipe 14 is controlled to decrease, and the operating rate of the feeding box 13 is reduced. The value of the current steam heat exchanger 12 is collected and integrated and analyzed through the data processing module to provide a reference for the working state of the worker and a basis for the control of the worker.

[0082] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A biomass steam boiler with intelligent and precise temperature control, comprising a furnace body (1). The furnace body (1) includes a combustion chamber (11), a steam heat exchanger (12), a feeding box (13), a feeding pipe (14), a screw conveyor (15), a wind pump unit (16) and a control box (17); it is characterized in that, Further comprising: An exhaust duct (18) is provided at the top of the feeding box (13). One end of the exhaust duct (18) is communicated with the inside of the feeding box (13), and the other end is communicated with the suction end of the air pump unit (16). A rotating shaft (2) is rotatably connected in the feeding box (13). The rotating shaft (2) is connected to a motor (21) provided at the top of the feeding box (13). One end of the rotating shaft (2) is connected to one end of the auger (15) through a clutch. A spiral blade (22) is fixedly connected to the rotating shaft (2). Spiral grooves (23) are evenly formed on the spiral blade (22). The cross-section of the spiral groove (23) is trapezoidal. The connecting part between adjacent spiral grooves (23) is sharp. Extrusion holes (24) are evenly provided in the spiral groove (23). An upper baffle (25) and a lower baffle (26) are respectively fixedly connected in the feeding box (13). The upper baffle (25) is located above the spiral blade (22), and the lower baffle (26) is close to the bottom of the spiral blade (22). The rotating shaft (2) penetrates through the upper baffle (25) and the lower baffle (26). Upper filter holes (27) and lower filter holes (28) are respectively formed on the upper baffle (25) and the lower baffle (26). A telescopic plate (29) is installed at the bottom of the upper baffle (25), and the bottom of the telescopic plate (29) rubs against the surface of the spiral blade (22). A combustion plate (3) is installed in the combustion chamber (11). The combustion plate (3) is arc-shaped. An ash pipe (31) is provided at the axial center of the combustion plate (3). One end of the feed pipe (14) faces the combustion plate (3). An ignition component (32) is installed on the combustion plate (3). Ventilation holes (33) are evenly formed on the top of the combustion plate (3). The inside of the combustion plate (3) with a hollow structure is communicated with the air pump unit (16) through a pipeline. On one side of the telescopic plate (29), extrusion rods (34) are evenly arranged. The extrusion rods (34) are horizontally installed, and a spring is provided between the extrusion rods (34) and the telescopic plate (29). The extrusion rods (34) slide into the telescopic plate (29); at one end of the extrusion rod (34) away from the telescopic plate (29), an extrusion wheel (35) is rotatably connected, and the outer ring of the extrusion wheel (35) contacts the inner wall of the spiral groove (23); at the bottom of the telescopic plate (29), a lifting rod (36) is slidably connected through a spring. The contact surface between the extrusion rod (34) and the lifting rod (36) is an inclined surface, and a collecting box (37) is hinged to the bottom of the lifting rod (36) through a torsion spring; a closed groove (38) is formed at the bottom of the telescopic plate (29), and the collecting box (37) is inserted into the closed groove (38). A sensor (39) is arranged at the bottom of the telescopic plate (29) within the closed groove (38); when the extrusion wheel (35) contacts the spiral blade (22), the lifting rod (36) is pressed to drive the collecting box (37) to descend, and the collecting box (37) is located between the bottom of the spiral blade (22) and the lower baffle (26); when the extrusion wheel (35) rises along the spiral blade (22), the collecting box (37) is flipped by the bottom of the spiral blade (22), and then reset through the torsion spring. The reset collecting box (37) is located within the spiral groove (23). On the outer ring of the extrusion wheel (35), extrusion blocks (4) are evenly arranged, and the cross-section of the extrusion blocks (4) is trapezoidal. The extrusion blocks (4) are inserted into the extrusion holes (24).

2. An intelligent and precisely temperature-controlled biomass steam boiler according to claim 1, wherein: The telescopic plate (29) includes a first plate (41) and a second plate (42). The first plate (41) with a hollow structure is installed at the bottom of the upper baffle (25). The second plate (42) is slidably connected to the bottom of the first plate (41) through a spring. The extrusion rods (34), extrusion wheels (35), lifting rods (36), collecting boxes (37) and closed grooves (38) are arranged on the second plate (42); a jet pipe (43) is arranged inside the second plate (42), and one end of the jet pipe (43) faces the sensor (39), and the other end communicates with the inside of the first plate (41); a sliding groove (44) is formed at the bottom of the second plate (42), and a sliding rod (45) is slidably connected within the sliding groove (44). One end of the sliding rod (45) is located within the sliding groove (44), and the other end is connected to the lifting rod (36); a cleaning sleeve (46) is arranged at the end of the sliding rod (45) away from the lifting rod (36), and a cleaning cloth is arranged inside the cleaning sleeve (46). The sensor (39) is located at the center of the cleaning sleeve (46); when the cleaning sleeve (46) descends, the cleaning sleeve (46) covers the sensor (39).

3. An intelligent and precisely temperature-controlled biomass steam boiler according to claim 2, characterized in that: A grille plate (5) is rotatably connected to the bottom of the upper baffle (25), and a torsion spring is provided between the grille plate (5) and the upper baffle (25); a guide block (51) is arranged on one side of the second plate (42), and a guide rod (52) is arranged at the bottom of the grille plate (5), and the bottom of the guide rod (52) contacts the wavy surface of the guide block (51); the upper filter holes (27) and the holes in the grille plate (5) form a whole hole in an inverted trapezoidal shape.

4. An intelligent and precisely temperature-controlled biomass steam boiler according to claim 3, characterized in that: A hydraulic tank (53) is provided inside the second plate (42). A hydraulic disc (54) is slidably connected to the top of the hydraulic tank (53) by a spring. Combustion-supporting agent is stored in the hydraulic tank (53). A nozzle (55) is provided on the hydraulic tank (53), and the nozzle (55) faces the fuel. An electric push rod (56) is provided on the inner wall of the first plate (41) away from the second plate (42), and the telescopic end of the electric push rod (56) is directly above the hydraulic disc (54).

5. An intelligent and precisely temperature-controlled biomass steam boiler according to claim 4, characterized in that: An extrusion plate (57) is provided at the bottom of the spiral blade (22), and one end of the extrusion plate (57) is inclined towards and contacts the surface of the lower baffle (26). The bottom of the extrusion plate (57) is slidably connected to a dredging rod (58) by a spring, and the bottom of the dredging rod (58) is inserted into the lower filter hole (28).

6. An intelligent and precisely temperature-controlled biomass steam boiler according to claim 1, characterized in that: A combustion net (6) is provided above the combustion plate (3). A rotating shaft (61) is rotatably connected to the center position of the combustion plate (3). The rotating shaft (61) is connected to a motor (62) provided at the bottom of the furnace body (1). Rake (63) are evenly provided on the rotating shaft (61). Among the rakes (63) adjacent up and down, the bottom of the upper rake (63) contacts the combustion net (6), and the bottom of the lower rake (63) contacts the combustion plate (3).

7. An intelligent and precisely temperature-controlled biomass steam boiler according to claim 6, characterized in that: Protrusions (64) are evenly provided on the combustion plate (3), and the bottom of the rake (63) contacts the protrusions (64).

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