Pulverized coal boiler system capable of directly blending combustible solid waste and method thereof

Abstract

The invention discloses a pulverized coal boiler system capable of directly blending combustible solid waste and a method of the pulverized coal boiler system, and belongs to the technical field of pulverized coal boiler systems.An inclined rotating fire grate is combined with a dry bottom hopper of a pulverized coal boiler, high-temperature flue gas heat in the space of the dry bottom hopper is used for preheating the waste solid waste, and the waste solid waste is mixed and burnt; the solid waste is subjected to self-heating incineration by utilizing the inclined rotating fire grate and high-temperature flue gas circulation, so that the technology has the advantages that the solid waste treatment efficiency is high, the application range is wide, the investment for specially building a solid waste incinerator is reduced, and the operation cost is greatly reduced; the petal cam is driven by the mixing assembly to be matched with the hydraulic adjusting assembly, reciprocating motion of the sealing plug is achieved, then the gas inlet position of the gas inlet head can be changed, the convection effect of flue gas can be enhanced, the high-temperature flue gas enters the spiral channel to spirally flow, multi-stage mixing of the high-temperature flue gas is achieved in cooperation with the stirring assembly, and the mixing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pulverized coal boiler systems, and in particular to a pulverized coal boiler system capable of directly mixing and burning combustible solid wastes and a method thereof. Background Art

[0002] In the energy sector, with the increasing global awareness of environmental protection and increasingly stringent carbon emission restrictions, the traditional coal-fired power industry is facing tremendous transformation pressure. In order to meet this challenge, the development and application of technologies that can directly burn combustible solid waste in pulverized coal boilers has become an important research direction.

[0003] Traditional pulverized coal boilers mainly rely on coal as fuel, and coal-fired power units have a high carbon emission reduction capacity, resulting in low flexibility in coupled power generation of coal and non-fossil materials, making it inconvenient to effectively utilize existing resources, and making it difficult to achieve sustainable development of coal-fired power and promote low-carbon and clean development of the coal-fired power industry.

[0004] In the current flue gas heat recovery and reuse technology system, the mixing tank plays a key role in mixing and treating multiple flue gases. However, the flue gas mixing tanks in the prior art face a series of challenges in practical applications. Specifically, it is difficult for these mixing tanks to quickly and effectively mix the two gases, and the required mixing time is relatively long, which often leads to the problem of uneven flue gas mixing, which in turn has an adverse effect on the flue gas recycling combustion effect. More importantly, during the mixing process, the existing mixing tanks lack the ability to pressurize and heat the flue gas, which directly leads to the low temperature of the output flue gas, which is difficult to meet the needs of direct reuse, thereby limiting the efficiency and flexibility of the entire flue gas heat recovery and reuse system. Therefore, it is urgent to develop a flue gas mixing tank that can quickly mix gases and simultaneously achieve pressurization and temperature treatment to improve the efficiency and effect of flue gas reuse. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that traditional pulverized coal boilers are not convenient for effective utilization of existing resources, and the flue gas mixing tank in the prior art is difficult to quickly and effectively mix the two gases, the required mixing time is relatively long, and there is a lack of ability to pressurize and heat the flue gas, which directly leads to the output flue gas temperature being low and difficult to meet the shortcomings of direct reuse. A pulverized coal boiler system and method that can directly burn combustible solid waste are proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A pulverized coal boiler system that can directly burn combustible solid waste includes a boiler device, the boiler device including: a furnace; a cold ash hopper, arranged below the furnace; an inclined rotating grate, arranged below the cold ash hopper; a silo for receiving combustible solid waste; a feeder, coupled to the silo and suitable for delivering the combustible solid waste from the silo via the cold ash hopper to the inclined rotating grate for incineration to generate high-temperature flue gas in a working state; an exhaust port, arranged in the cold ash hopper and suitable for extracting high-temperature flue gas in the working state; and a mixing mechanism, wherein one fluid at the input end is coupled to the exhaust port, the other fluid is coupled to the silo, and the output end is respectively fluidly coupled to the inclined rotating grate and the silo, so as to cyclically receive the high-temperature flue gas and the cold flue gas from the silo and mix them to obtain mixed flue gas, and the mixed flue gas is respectively delivered to the silo and the inclined rotating grate via a high-temperature fan.

[0008] In some embodiments, the mixing mechanism includes a tank body, an outer shell is installed above the tank body, two sealing plugs and two air intake assemblies are arranged in the outer shell, a hydraulic adjustment assembly is connected to one side of the sealing plug, a spiral path is connected below the two hydraulic adjustment assemblies, an adjustable inner cavity is arranged between the spiral path and the outer shell, a plurality of stirring assemblies are arranged in the spiral path, the plurality of stirring assemblies are transmitted to the same transmission assembly, and a mixing assembly is connected to the top of the transmission assembly, the mixing assembly is arranged in the adjustable inner cavity and the outer shell, a petal cam is connected to the outside of the mixing assembly, the petal cam is overlapped with two pulleys, and the two pulleys are respectively connected to the two air intake assemblies.

[0009] In some embodiments, the boiler device also includes a burner, which is installed on the furnace, and the high-temperature fan is connected to the silo through an outlet pipe, and the silo is arranged above the feeder. The outlet pipe is also connected to the flue gas chamber through a distribution pipe, and one side of the silo is connected to a cold smoke duct; a roller grate with a toothed surface is arranged on the inclined rotating grate, and the roller grate is 3°-15° and is arranged inclined from top to bottom.

[0010] In some embodiments, the bottom of the spiral path is connected to the high-temperature fan through a soft pipe, and two telescopic rods are fixedly connected to the top of the spiral path, and the top ends of the two telescopic rods are fixedly connected to the top wall of the tank body; a plurality of blades are fixedly connected to the top of the petal cam.

[0011] In some embodiments, the adjustable inner cavity includes an upper cavity and a lower cavity, and the upper cavity and the lower cavity are respectively fixedly connected to the outer shell and the spiral path. A sealing ring is fixedly connected below the upper cavity, and the sealing ring overlaps the inner wall of the lower cavity.

[0012] In some embodiments, the stirring assembly includes a stirring rod, which is rotatably mounted in the spiral track through a bearing, and one end of the stirring rod is fixedly connected to the second bevel gear.

[0013] In some embodiments, the mixing assembly further comprises a motor, the motor is mounted above the housing, the output shaft of the motor is fixedly connected to a stirring shaft, the petal cam is fixedly connected to the stirring shaft, and the stirring shaft is rotatably mounted on the housing via a bearing.

[0014] In some embodiments, the transmission assembly includes a polygonal rod, the top end of which is fixedly connected to the stirring shaft, a sleeve is provided on the outer sleeve of the polygonal rod, the sleeve is rotatably mounted on the spiral path through a bearing, a first bevel tooth is fixedly connected to the sleeve, and the first bevel tooth is meshed with a plurality of second bevel teeth.

[0015] In some embodiments, the air intake assembly includes an air intake head, a pulley is fixedly connected to the air intake head, the air intake head is installed on a sealing plug, one side of the air intake head is connected to an air intake hose, two air intake hoses pass through the outer shell and are respectively connected to the hot smoke duct and the cold smoke duct.

[0016] In some embodiments, the hydraulic adjustment assembly includes two piston cylinders, the two piston cylinders are mounted on the housing, a first piston rod and a second piston rod are arranged in the piston cylinder, the bottom ends of the two second piston rods pass through the piston cylinder and are fixedly connected to a connecting plate, and the connecting plate is fixedly connected to the spiral track;

[0017] The two first piston rods pass through the piston cylinder and are fixedly connected to the sealing plug. One side of the sealing plug is fixedly connected to two springs, and one end of the spring is fixedly connected to the piston cylinder.

[0018] A method for using a pulverized coal boiler system capable of directly mixing and burning combustible solid waste comprises the following steps:

[0019] S1. The waste solids are fed into the cold ash hopper space through the feeder. The waste solids absorb the combustion heat energy of the furnace coal powder along the inclined wall of the cold ash hopper. The waste solids are heated to separate out water and flow into the inclined rotating grate for incineration. The solid ash residue produced by the incineration is continuously pushed to the right side for discharge;

[0020] S2. The high-temperature flue gas generated by the incineration is extracted through the exhaust port and enters the upper shell through the air inlet head. At this time, the stirring shaft is driven by the motor to rotate, and the stirring shaft drives the petal cam and the blades to rotate. The petal cam squeezes the pulley to drive the sealing plug to move, and the sealing plug drives the spring to deform. When the petal cam extrusion surface is separated from the pulley, the spring drives the sealing plug to reset until the petal cam squeezes the pulley again, thereby realizing the reciprocating motion of the sealing plug, so that the gas discharged from the two air inlet heads is evenly convected and stirred by the blades;

[0021] S3, the high-temperature flue gas after convection is made to flow downward into the upper chamber and the lower chamber. At this time, the stirring shaft is mixed, and the reciprocating motion of the sealing plug also drives the first piston rod to reciprocate. Then, the second piston rod is driven by hydraulic pressure to realize the up and down shaking of the spiral path, so that the spiral path drives the lower chamber to move up and down. The volume of the upper chamber and the lower chamber changes reciprocatingly to realize the pressurized high-temperature flue gas to increase the heat;

[0022] S4, then the high-temperature flue gas enters the spiral channel and is mixed by shaking up and down. At the same time, the rotating shaft drives the multilateral rod to drive the sleeve to rotate, so that the sleeve drives the first bevel gear and the second bevel gear to drive. At this time, the stirring rod rotates to further mix the high-temperature flue gas, so that the high-temperature flue gas flows along the spiral channel for multi-stage mixing;

[0023] S5. After mixing, it enters the hot smoke duct through the high-temperature fan. A part of it is diverted into the smoke chamber through the distribution pipe as the oxygen required for solid waste incineration, and the other part enters the silo to preheat the solid waste. Then it flows through the cold smoke duct and is discharged through another air inlet head for recycling.

[0024] Compared with the prior art, the present invention provides a pulverized coal boiler system and method that can directly burn combustible solid waste, which has the following beneficial effects:

[0025] 1. The pulverized coal boiler system and method for directly burning combustible solid waste combines the inclined rotating grate with the cold ash hopper of the pulverized coal boiler, uses the high-temperature flue gas heat in the cold ash hopper space to preheat the waste solids, and uses the inclined rotating grate and high-temperature flue gas circulation to self-heat the solid waste. Therefore, the technology has high solid waste treatment efficiency and a wide range of applications, reduces the investment in the construction of a solid waste incinerator, and greatly reduces the operating cost. At the same time, the direct burning of non-fossil biomass mixture technology can achieve a biomass burning amount of more than 20% of the total coal burning in the boiler by mixing agricultural and forestry wastes, molded biomass, etc. with coal in proportion. It has significant fuel adaptability advantages and can be compatible with biomass fuels of different calorific values ​​and humidity without large-scale transformation of existing coal-fired units. It is particularly suitable for the efficient consumption of regional surplus biomass resources such as straw and rice husks.

[0026] 2. When the flue gas refluxes for mixing, the petal cam is driven by the mixing component to cooperate with the hydraulic adjustment component to realize the reciprocating motion of the sealing plug, thereby changing the air intake position of the air intake head, enhancing the convection effect of the flue gas, and the high-temperature flue gas enters the spiral channel for spiral flow, and cooperates with the stirring component to realize multi-stage mixing of the high-temperature flue gas, thereby improving the mixing efficiency.

[0027] 3. The pulverized coal boiler system and method that can directly burn combustible solid waste drives the petal cam to rotate through the stirring component. The petal cam squeezes the pulley and cooperates with the hydraulic adjustment component to realize the movement of the sealing plug. The sealing plug then drives the hydraulic adjustment component to swing up and down through the hydraulically driven spiral path, which is beneficial to the mixing of the high-temperature flue gas inside the spiral path. The spiral path also drives the movement of the adjustable inner cavity, so that the volume of the adjustable inner cavity changes continuously, thereby pressurizing the high-temperature flue gas and making the high-temperature flue gas molecules exchange frequently and more violently, thereby achieving a certain heating effect, thereby improving the waste heat recovery and utilization effect.

[0028] 4. The pulverized coal boiler system and method that can directly burn combustible solid waste discharges flue gas relatively through two air intake components to make the flue gas convection. At the same time, the mixing component drives the petal cam to rotate, so that the petal cam cooperates with the hydraulic adjustment component to drive the sealing plug to reciprocate, thereby greatly improving the convection effect and facilitating subsequent mixing operations. After convection, the mixing process can be performed by mixing the nearest preliminary mixing treatment, and then the hydraulic adjustment component drives the spiral channel to swing up and down to make the adjustable inner cavity move, which can further pressurize the molecules of the high-temperature flue gas to collide violently, thereby increasing the thermal energy of the high-temperature flue gas. As the high-temperature flue gas enters the spiral channel for spiral flow, multi-stage mixing can be achieved through the stirring component. At the same time, the mixing effect can be further improved by coordinating with the spiral channel to swing up and down, so that the high-temperature flue gas can be evenly output to achieve the heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a flow chart of a pulverized coal boiler system that can directly burn combustible solid wastes proposed by the present invention;

[0030] Figure 2 A three-dimensional view of a mixing mechanism of a pulverized coal boiler system capable of directly mixing and burning combustible solid wastes proposed by the present invention;

[0031] Figure 3 A three-dimensional view of a tank of a pulverized coal boiler system that can directly burn combustible solid wastes proposed by the present invention;

[0032] Figure 4 A three-dimensional view of the connection between the adjustable inner cavity and the spiral path of a pulverized coal boiler system capable of directly mixing and burning combustible solid wastes proposed by the present invention;

[0033] Figure 5 A three-dimensional view of an adjustable inner cavity section of a pulverized coal boiler system capable of directly mixing and burning combustible solid wastes proposed by the present invention;

[0034] Figure 6 A three-dimensional view of the upper shell section of a pulverized coal boiler system capable of directly mixing and burning combustible solid wastes proposed by the present invention;

[0035] Figure 7 A three-dimensional view of a spiral section of a pulverized coal boiler system capable of directly mixing and burning combustible solid wastes proposed by the present invention;

[0036] Figure 8 A three-dimensional view of the connection between the hydraulic adjustment component and the sealing plug of a pulverized coal boiler system capable of directly mixing and burning combustible solid wastes proposed by the present invention;

[0037] Fig. 9 A three-dimensional view of a mixing component of a pulverized coal boiler system capable of directly mixing and burning combustible solid wastes proposed by the present invention;

[0038] Fig.10 A three-dimensional view of the connection between an air intake assembly and a sealing plug of a pulverized coal boiler system capable of directly mixing and burning combustible solid wastes proposed by the present invention;

[0039] Fig.11 A three-dimensional view of the cross section of a hydraulic adjustment component of a pulverized coal boiler system that can directly burn combustible solid waste, as proposed by the present invention.

[0040] In the figure: 100, boiler device; 101, furnace; 102, cold ash hopper; 103, silo; 104, feeder; 105, burner; 106, mixing mechanism; 1061, tank; 1062, shell; 1063, adjustable inner cavity; 10631, lower cavity; 10632, sealing ring; 10633, upper cavity; 1064, flexible pipe; 1065, mixing assembly; 10651, motor; 10652, stirring shaft; 1066, hydraulic adjustment assembly; 10661, first piston rod; 10662, spring; 10663, piston cylinder; 10664, second piston rod; 10665, connecting plate; 1067, stirring Assembly; 10671, second bevel gear; 10672, stirring rod; 1068, transmission assembly; 10681, polygonal rod; 10682, sleeve; 10683, first bevel gear; 1069, air intake assembly; 10691, air intake head; 10692, air intake hose; 10610, pulley; 10611, sealing plug; 10612, telescopic rod; 10613, petal cam; 10614, blade; 10615, spiral path; 107, exhaust port; 108, inclined rotating grate; 109, distribution pipe; 110, flue gas chamber; 111, high temperature fan; 112, outlet pipe; 113, cold smoke pipe; 114, hot smoke pipe. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. The combustion state of the pulverized coal boiler system mentioned in each embodiment of the present invention is the working state.

[0043] Reference Figures 1 to 10 A pulverized coal boiler system capable of directly mixing combustible solid wastes comprises a boiler device 100, wherein the boiler device 100 comprises a furnace 101, a burner 105, a cold ash hopper 102, a silo 103, a feeder 104, a mixing mechanism 106, a high temperature fan 111, an air extraction port 107, an inclined rotary grate 108 and a flue gas chamber 110. The cold ash hopper 102 is arranged below the furnace 101, and the feeder 104 is arranged at one side of the cold ash hopper 102. The combustible solid wastes or any other suitable fuels in the silo 103 can be smoothly fed into the cold ash hopper 102 through the feeder 104, thereby achieving the purpose of feeding.

[0044] Continue to refer to Figures 1 to 10 The flue gas chamber 110 and the inclined rotating grate 108 are arranged at the bottom of the cold ash hopper 102, and the exhaust port 107 is arranged in the cold ash hopper 102. The exhaust port 107 can guide the high-temperature flue gas into the mixing mechanism 106, which is convenient for the mixing operation of the high-temperature flue gas, and the exhaust port 107 is connected to the mixing mechanism 106 through the hot smoke pipe 114 passing through the cold ash hopper 102. The bottom of the mixing mechanism 106 is connected to the high-temperature fan 111, and the high-temperature fan 111 can be used to transport the high-temperature flue gas, so that the high-temperature flue gas can be smoothly input into the flue gas chamber 110 and the silo 103. The burner 105 is installed on the furnace 101, and the high-temperature fan 111 is connected to the silo 103 through the outlet pipe 112. The high-temperature flue gas can be transported into the silo 103 through the outlet pipe 112 to heat the solid waste, which is convenient for the precipitation of moisture.

[0045] In one embodiment, the silo 103 is arranged above the feeder 104, and the feeder 104 can be, for example, a shaftless auger feeder. The outlet pipe 112 is also connected to the smoke chamber 110 through the distribution pipe 109, and part of the high-temperature smoke is diverted into the smoke chamber 110 through the distribution pipe 109, thereby providing oxygen for the incineration of solid waste. One side of the silo 103 is connected to a cold smoke pipe 113, and the smoke can be guided to flow back to the mixing mechanism 106 again through the cold smoke pipe 113 for recycling. The inclined rotating grate 108 is provided with a roller grate with a tooth surface, and the roller grate is 3°-15° and is arranged from top to bottom. Under the action of the rotation and undulating tooth surface of the roller grate, the waste solids are turned over and stirred, and fully contacted and burned with the high-temperature mixed smoke from the smoke chamber 110 under the roller grate. Secondly, according to the separate chambers of the drum grate, the residence time and combustion of garbage or combustible solid waste on the grate are controlled by adjusting the rotating speed of the drum grate and the amount of high-temperature mixed flue gas.

[0046] In some embodiments, Figures 1 to 10As shown, the mixing mechanism 106 creatively proposed by the present disclosure may include a tank body 1061, a shell 1062 may be installed on the top of the tank body 1061, two sealing plugs 10611 and two air intake components 1069 are arranged in the shell 1062, the air intake component 1069 includes an air intake head 10691, a pulley 10610 is fixedly connected to the air intake head 10691, the two air intake heads 10691 are arranged opposite to each other, so that the convection operation of the high-temperature flue gas can be realized, which is beneficial to the mixing operation, and the air intake head 10691 is installed on the sealing plug 10611, and the sealing plug 10611 One side of the air inlet head 10691 is fixedly connected with two springs 10662, one end of the spring 10662 is fixedly connected with the piston cylinder 10663, one side of the air inlet head 10691 is connected with an air inlet hose 10692, through which high-temperature flue gas can be transported into the upper shell, and the air inlet hose 10692 can be retracted and moved, so that the sealing plug 10611 can move smoothly, the two air inlet hoses 10692 pass through the outer shell 1062, and are respectively connected with the hot smoke duct 114 and the cold smoke duct 113, one side of the sealing plug 10611 is connected with a hydraulic adjustment component 1066, two The spiral path 10615 is connected to the bottom of the hydraulic adjustment component 1066. The spiral shape of the spiral path 10615 allows the high-temperature flue gas to flow in a spiral shape, thereby facilitating the multi-stage mixing operation of the high-temperature flue gas through the stirring component 1067. The bottom of the spiral path 10615 is connected to the high-temperature fan 111 through the soft pipe 1064. The mobility of the soft pipe 1064 allows the spiral path 10615 to move smoothly. Two telescopic rods 10612 are fixedly connected to the top of the spiral path 10615. The telescopic rods 10612 can guide the spiral path 10615 to keep the spiral path 10615 moves stably up and down, the top ends of the two telescopic rods 10612 are fixedly connected to the top wall of the tank body 1061, an adjustable inner cavity 1063 is provided between the spiral path 10615 and the outer shell 1062, a plurality of stirring components 1067 are provided in the spiral path 10615, and the stirring component 1067 includes a stirring rod 10672, through which the high-temperature flue gas passing through can be mixed, and the stirring rod 10672 is rotatably installed in the spiral path 10615 through a bearing, and one end of the stirring rod 10672 is fixedly connected to the second bevel gear 10671;

[0047] In some embodiments, continue to refer to Figures 1 to 10, multiple stirring components 1067 are driven by the same transmission component 1068, the transmission component 1068 includes a polygonal rod 10681, the top of the polygonal rod 10681 is fixedly connected to the stirring shaft 10652, the outer cover of the polygonal rod 10681 is provided with a sleeve 10682, the sleeve 10682 can slide on the polygonal rod 10681, so that the spiral path 10615 can move smoothly, and the polygonal rod 10681 is a polygonal structure, and the sleeve 10682 is The shape is adapted to the shape of the polygonal rod 10681, so that the polygonal rod 10681 can smoothly drive the sleeve 10682 to rotate, and the sleeve 10682 is rotatably installed on the spiral track 10615 through a bearing, and the sleeve 10682 is fixedly connected with a first bevel gear 10683, and the first bevel gear 10683 is meshed with a plurality of second bevel gears 10671, and the top of the transmission component 1068 is connected to a mixing component 1065, and the mixing component 1065 includes Motor 10651, motor 10651 is installed above the shell 1062, the output shaft of motor 10651 is fixedly connected with stirring shaft 10652, stirring shaft 10652 is driven to rotate by motor 10651, so that stirring shaft 10652 can mix the high-temperature flue gas, petal cam 10613 is fixedly connected to stirring shaft 10652, stirring shaft 10652 is rotatably installed on shell 1062 through bearing, mixing assembly 1065 is arranged in adjustable inner cavity 1063 and shell 1062, the mixing assembly 1065 is externally connected with petal cam 10613, a plurality of blades 10614 are fixedly connected above petal cam 10613, and turbulence can be performed during high-temperature flue gas convection through blades 10614, which is beneficial to mixing operation, petal cam 10613 is overlapped with two pulleys 10610, and two pulleys 10610 are respectively connected with two air intake assemblies 1069.

[0048] In this embodiment, the inclined rotating grate 108 is combined with the cold ash hopper 102 of the pulverized coal boiler, the high-temperature flue gas heat in the cold ash hopper 102 is used to preheat the waste solids, and the inclined rotating grate 108 and the high-temperature flue gas are circulated to carry out self-heating incineration of the solid waste. Therefore, the technology has high solid waste treatment efficiency and a wide range of applications, reduces the investment in building a solid waste incinerator, and greatly reduces the operating cost. Secondly, when the flue gas refluxes for mixing, the stirring shaft 10652 is driven to rotate by the motor 10651, and the stirring shaft 10652 drives the petal cam 10613 to rotate, so that the petal cam 10613 squeezes The pressure pulley 10610 cooperates with the spring 10662 to realize the sealing plug 10611, and realizes the reciprocating motion of the sealing plug 10611, thereby changing the air intake position of the air intake head 10691, enhancing the convection effect of the flue gas, and the high-temperature flue gas enters the spiral channel 10615 and flows in a spiral manner, so that the stirring shaft 10652 can drive the sleeve 10682 to rotate through the polygonal rod 10681, and the sleeve 10682 is driven by the first bevel gear 10683 and the second bevel gear 10671, and the second bevel gear 10671 drives the stirring rod 10672 to rotate, so that the high-temperature flue gas spirally flows through the stirring rod 10672 for multiple times to realize multi-stage mixing operations and improve mixing efficiency.

[0049] In one embodiment, referring to Figure 5 and Fig.11 A pulverized coal boiler system capable of directly mixing and burning combustible solid waste comprises an adjustable inner cavity 1063, wherein the adjustable inner cavity 1063 comprises an upper cavity 10633 and a lower cavity 10631, wherein the upper cavity 10633 and the lower cavity 10631 are respectively fixedly connected to a shell 1062 and a spiral path 10615, and a sealing ring 10632 is fixedly connected below the upper cavity 10633, and the sealing performance of the upper cavity 10633 and the lower cavity 10631 can be maintained by the sealing ring 10632. 10632 overlaps with the inner wall of the lower chamber 10631, two sealing plugs 10611 and two air intake components 1069 are arranged in the housing 1062, a petal cam 10613 is externally connected to the mixing component 1065, the petal cam 10613 overlaps with the two pulleys 10610, and the pulley 10610 can reduce friction resistance and wear by squeezing between the petal cam 10613 and the pulley 10610, and the petal cam 10613 overlaps with the two pulleys 10610;

[0050] In this embodiment, the hydraulic adjustment assembly 1066 includes two piston cylinders 10663, which are installed on the outer shell 1062. A first piston rod 10661 and a second piston rod 10664 are arranged in the piston cylinder 10663. The bottom ends of the two second piston rods 10664 pass through the piston cylinder 10663 and are fixedly connected to the connecting plate 10665. The connecting plate 10665 is fixedly connected to the spiral path 10615. The two first piston rods 10661 pass through the piston cylinder 10663 and are fixedly connected to the sealing plug 10611. Two springs 10662 are fixedly connected to one side of the sealing plug 10611, and one end of the spring 10662 is fixedly connected to the piston cylinder 10663.

[0051] In this embodiment, the petal cam 10613 is driven to rotate by the stirring assembly 1067, the petal cam 10613 squeezes the pulley 10610 and cooperates with the spring 10662 to realize the reciprocating motion of the sealing plug 10611, and the sealing plug 10611 drives the first piston rod 10661 to move, and the first piston rod 10661 drives the second piston rod 10664 to move through the hydraulic drive, and the second piston rod 10664 drives the spiral path 10615 to move up and down through the connecting plate 10665, so as to facilitate the mixing of the high-temperature flue gas inside the spiral path 10615, and the spiral path 10615 also drives the lower chamber 10631 to move up and down, so that the volume of the lower chamber 10631 changes continuously, so as to realize the pressurization of the high-temperature flue gas, so that the high-temperature flue gas molecules are frequently and more violently exchanged, so as to achieve a certain heating effect, thereby improving the waste heat recovery and utilization effect.

[0052] In some embodiments, reference Figures 4 to 8 A pulverized coal boiler system capable of directly mixing and burning combustible solid waste comprises a mixing mechanism 106, the mixing mechanism 106 comprises a tank body 1061, a shell 1062 is installed above the tank body 1061, two sealing plugs 10611 and two air intake components 1069 are arranged in the shell 1062, a hydraulic adjustment component 1066 is connected to one side of the sealing plug 10611, a spiral channel 10615 is connected to the lower part of the two hydraulic adjustment components 1066, and an adjustable inner The cavity 1063 and the spiral path 10615 are provided with a plurality of stirring components 1067, and the plurality of stirring components 1067 are transmitted by the same transmission component 1068, and the top of the transmission component 1068 is connected with a mixing component 1065, and the mixing component 1065 is arranged in the adjustable inner cavity 1063 and the outer shell 1062, and the mixing component 1065 is externally connected with a petal cam 10613, and the petal cam 10613 is overlapped with two pulleys 10610, and the two pulleys 10610 are respectively connected with two air intake components 1069.

[0053] In this embodiment, the flue gas is discharged relatively by two air intake components 1069 to make the flue gas convection, and at the same time, the mixing component 1065 drives the petal cam 10613 to rotate, so that the petal cam 10613 cooperates with the hydraulic adjustment component 1066 to drive the sealing plug 10611 to reciprocate, thereby greatly improving the convection effect and facilitating subsequent mixing operations. After convection, the preliminary mixing treatment can be performed by the mixing device, and then the spiral channel 10615 is driven by the hydraulic adjustment component 1066 to swing up and down to make the adjustable inner cavity 1063 move, which can further pressurize the molecules of the high-temperature flue gas to collide violently, thereby increasing the thermal energy of the high-temperature flue gas. As the high-temperature flue gas enters the spiral channel 10615 and flows in a spiral, multi-stage mixing can be achieved through the stirring component 1067. At the same time, the mixing effect can be further improved by cooperating with the spiral channel 10615 to swing up and down, so that the high-temperature flue gas can be evenly output to achieve the heating effect.

[0054] In one embodiment, a method for using a pulverized coal boiler system capable of directly mixing and burning combustible solid waste comprises the following steps:

[0055] S1. The waste solids are fed into the cold ash hopper 102 through the feeder 104. The waste solids absorb the combustion heat energy of the coal powder in the furnace 101 along the inclined wall of the cold ash hopper 102. The waste solids are heated to separate out water and flow into the inclined rotating grate 108 for incineration. The solid ash produced by the incineration is continuously pushed to the right side for discharge;

[0056] S2. The high-temperature flue gas generated by the incineration is extracted through the exhaust port 107 and enters the upper shell through the air inlet head 10691. At this time, the stirring shaft 10652 is driven to rotate by the motor 10651, and the stirring shaft 10652 drives the petal cam 10613 and the blade 10614 to rotate. The petal cam 10613 squeezes the pulley 10610 to drive the sealing plug 10611 to move, and the sealing plug 10611 drives the spring 10662 to deform. When the extrusion surface of the petal cam 10613 separates from the pulley 10610, the spring 10662 drives the sealing plug 10611 to reset until the petal cam 10613 squeezes the pulley 10610 again, thereby realizing the reciprocating motion of the sealing plug 10611, so that the gas discharged from the two air inlet heads 10691 is evenly convected and stirred by the blade 10614;

[0057] S3, the high-temperature flue gas after convection is made to enter the upper chamber 10633 and the lower chamber 10631 downward, at which time the stirring shaft 10652 is mixed, and the reciprocating motion of the sealing plug 10611 also drives the first piston rod 10661 to reciprocate, and the second piston rod 10664 is driven by hydraulic pressure to realize the up and down shaking of the spiral path 10615, so that the spiral path 10615 drives the lower chamber 10631 to move up and down, and the volume of the upper chamber 10633 and the lower chamber 10631 changes reciprocatingly to realize the pressurized high-temperature flue gas to increase heat;

[0058] S4, then the high-temperature flue gas enters the spiral channel 10615 and is mixed by shaking up and down. At the same time, the rotating shaft drives the polygonal rod 10681 to drive the sleeve 10682 to rotate, so that the sleeve 10682 drives the first bevel gear 10683 and the second bevel gear 10671 to transmit. At this time, the stirring rod 10672 rotates to further mix the high-temperature flue gas, so that the high-temperature flue gas flows along the spiral channel 10615 for multi-stage mixing;

[0059] S5. After mixing, it enters the hot smoke duct 114 through the high-temperature fan 111, a part of it is diverted into the smoke chamber 110 through the distribution pipe 109 to serve as the oxygen required for the incineration of solid waste, and the other part enters the silo 103 to preheat the solid waste, and then flows through the cold smoke duct 113 and is discharged through another air inlet head 10691 for recycling.

[0060] According to various embodiments of the present invention, at least the following technical effects can be achieved: the pulverized coal boiler system and method that can directly burn combustible solid waste, by combining the inclined rotating grate with the cold ash hopper of the pulverized coal boiler, uses the heat of the high-temperature flue gas in the cold ash hopper space to preheat the waste solids, and uses the inclined rotating grate and high-temperature flue gas circulation to carry out self-heating incineration of solid waste. Therefore, the technology has high solid waste treatment efficiency and a wide range of applications, reduces the investment in the construction of a solid waste incinerator, and greatly reduces the operating cost. When the flue gas refluxes for mixing, the petal cam is driven by the mixing component to cooperate with the hydraulic adjustment component to achieve the reciprocating motion of the sealing plug, thereby changing the intake position of the intake head, enhancing the convection effect of the flue gas, and the high-temperature flue gas enters the spiral channel for spiral flow, and cooperates with the stirring component to achieve multi-stage mixing of the high-temperature flue gas, thereby improving the mixing efficiency. The pulverized coal boiler system and method capable of directly blending combustible solid waste drives the petal cam to rotate through a stirring component, and the petal cam squeezes the pulley and cooperates with the hydraulic adjustment component to realize the movement of the sealing plug. The sealing plug then drives the hydraulic adjustment component to swing up and down through the hydraulically driven spiral path, thereby facilitating the mixing of the high-temperature flue gas inside the spiral path, and the spiral path drives the movement of the adjustable inner cavity, so that the volume of the adjustable inner cavity changes continuously, thereby pressurizing the high-temperature flue gas and causing the high-temperature flue gas molecules to exchange frequently and more violently, thereby achieving a certain heating effect, thereby improving the waste heat recovery and utilization effect. The pulverized coal boiler system and method capable of directly blending combustible solid waste discharges flue gas relatively through two air intake components to achieve flue gas convection, and at the same time, the mixing component drives the petal cam to rotate, so that the petal cam cooperates with the hydraulic adjustment component to drive the sealing plug to reciprocate, thereby greatly improving the convection effect and facilitating subsequent mixing operations. After convection, preliminary mixing treatment can be performed by the mixing unit, and then the spiral channel is driven up and down by the hydraulic adjustment component to move the adjustable inner cavity, which can further pressurize the molecules of the high-temperature flue gas to violently collide, thereby increasing the thermal energy of the high-temperature flue gas. As the high-temperature flue gas enters the spiral channel for spiral flow, multi-stage mixing can be achieved through the stirring component, and at the same time, the mixing effect can be further improved by cooperating with the spiral channel to shake up and down, so that the high-temperature flue gas can be evenly output to achieve the heating effect.

[0061] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pulverized coal boiler system capable of directly mixing combustible solid waste, comprising a boiler device (100), characterized in that: The boiler device (100) comprises: Furnace (101); A cold ash hopper (102) is arranged below the furnace (101); An inclined rotating grate (108) is arranged below the cold ash hopper (102); A silo (103) for receiving combustible solid waste; A feeder (104), coupled to the silo (103) and adapted to deliver combustible solid waste from the silo (103) via the cold ash hopper (102) to the inclined rotary grate (108) for incineration to generate high-temperature flue gas in a working state; An air extraction port (107) is arranged in the cold ash hopper (102) and is suitable for extracting high-temperature flue gas in the working state; and A mixing mechanism (106) has one fluid input end coupled to the exhaust port (107), another fluid input end coupled to the silo (103), and an output end fluidly coupled to the inclined rotating grate (108) and the silo (103), so as to cyclically receive and mix the high-temperature flue gas and the cold flue gas from the silo (103) to obtain mixed flue gas, and deliver the mixed flue gas to the silo (103) and the inclined rotating grate (108), respectively, via a high-temperature fan (111).

2. A pulverized coal boiler system capable of directly mixing combustible solid waste according to claim 1, characterized in that: The mixing mechanism (106) comprises a tank body (1061), an outer shell (1062) is installed above the tank body (1061), two sealing plugs (10611) and two air intake assemblies (1069) are arranged in the outer shell (1062), one side of the sealing plug (10611) is connected to a hydraulic adjustment assembly (1066), the lower parts of the two hydraulic adjustment assemblies (1066) are connected to a spiral channel (10615), an adjustable inner cavity (1063) is arranged between the spiral channel (10615) and the outer shell (1062), and the spiral channel (1061 5) is provided with a plurality of stirring assemblies (1067), the plurality of stirring assemblies (1067) are driven by the same transmission assembly (1068), and the top end of the transmission assembly (1068) is connected to a mixing assembly (1065), the mixing assembly (1065) is arranged in the adjustable inner cavity (1063) and the outer shell (1062), and the mixing assembly (1065) is externally connected to a petal cam (10613), the petal cam (10613) is overlapped with two pulleys (10610), and the two pulleys (10610) are respectively connected to two air intake assemblies (1069).

3. The pulverized coal boiler system capable of directly mixing combustible solid waste with the pulverized coal boiler system according to claim 1 is characterized in that: The boiler device (100) further comprises a burner (105), wherein the burner (105) is installed on the furnace (101); the high-temperature fan (111) is connected to the silo (103) via an outlet pipe (112); the silo (103) is arranged above the feeder (104); the outlet pipe (112) is also connected to the smoke chamber (110) via a distribution pipe (109); one side of the silo (103) is connected to the mixing mechanism (106) via a cold smoke pipe (113); and The inclined rotating grate (108) is provided with a roller grate with a toothed surface, and the roller grate is arranged inclined from top to bottom at an angle of 3°-15°.

4. The pulverized coal boiler system capable of directly mixing combustible solid waste with the pulverized coal boiler system according to claim 2 is characterized in that: The bottom of the spiral path (10615) is connected to the high-temperature fan (111) via a soft pipe (1064), and the top of the spiral path (10615) is fixedly connected to two telescopic rods (10612), and the top ends of the two telescopic rods (10612) are fixedly connected to the top wall of the tank body (1061); and A plurality of blades (10614) are fixedly connected above the petal cam (10613).

5. A pulverized coal boiler system capable of directly mixing combustible solid waste according to claim 2 or 4, characterized in that: The adjustable inner cavity (1063) comprises an upper cavity (10633) and a lower cavity (10631), wherein the upper cavity (10633) and the lower cavity (10631) are respectively fixedly connected to the outer shell (1062) and the spiral path (10615), a sealing ring (10632) is fixedly connected below the upper cavity (10633), and the sealing ring (10632) overlaps the inner wall of the lower cavity (10631); and The stirring assembly (1067) comprises a stirring rod (10672), wherein the stirring rod (10672) is rotatably mounted in the spiral track (10615) via a bearing, and one end of the stirring rod (10672) is fixedly connected to a second bevel tooth (10671).

6. A pulverized coal boiler system capable of directly mixing combustible solid waste with the pulverized coal boiler system according to claim 5, characterized in that: The mixing assembly (1065) further comprises a motor (10651), wherein the motor (10651) is mounted above the housing (1062), wherein an output shaft of the motor (10651) is fixedly connected to a stirring shaft (10652), wherein the petal cam (10613) is fixedly connected to the stirring shaft (10652), and wherein the stirring shaft (10652) is rotatably mounted on the housing (1062) via a bearing.

7. A pulverized coal boiler system capable of directly mixing combustible solid wastes according to claim 6, characterized in that: The transmission assembly (1068) comprises a polygonal rod (10681), the top end of the polygonal rod (10681) is fixedly connected to the stirring shaft (10652), the outer cover of the polygonal rod (10681) is provided with a sleeve (10682), the sleeve (10682) is rotatably mounted on the spiral track (10615) via a bearing, and a first bevel tooth (10683) is fixedly connected to the sleeve (10682), and the first bevel tooth (10683) is meshed with a plurality of second bevel teeth (10671).

8. The pulverized coal boiler system capable of directly mixing combustible solid waste with the pulverized coal boiler system according to claim 7, characterized in that: The air intake assembly (1069) comprises an air intake head (10691), a pulley (10610) fixedly connected to the air intake head (10691), the air intake head (10691) being mounted on a sealing plug (10611), one side of the air intake head (10691) being connected to an air intake hose (10692), the two air intake hoses (10692) passing through the housing (1062) and being connected to the hot smoke duct (114) and the cold smoke duct (113), respectively.

9. A pulverized coal boiler system capable of directly mixing combustible solid wastes according to claim 8, characterized in that: The hydraulic adjustment assembly (1066) comprises two piston cylinders (10663), the two piston cylinders (10663) are mounted on the housing (1062), a first piston rod (10661) and a second piston rod (10664) are arranged in the piston cylinders (10663), the bottom ends of the two second piston rods (10664) pass through the piston cylinders (10663) and are fixedly connected to a connecting plate (10665), and the connecting plate (10665) is fixedly connected to the spiral track (10615); and The two first piston rods (10661) pass through the piston cylinder (10663) and are fixedly connected to the sealing plug (10611). Two springs (10662) are fixedly connected to one side of the sealing plug (10611), and one end of the spring (10662) is fixedly connected to the piston cylinder (10663).

10. The method for using a pulverized coal boiler system capable of directly mixing and burning combustible solid waste according to claim 9, characterized in that: The following steps are involved: S1. The waste solids are fed into the space of the cold ash hopper (102) through the feeder (104). The waste solids absorb the combustion heat energy of the coal powder in the furnace (101) along the inclined wall of the cold ash hopper (102). The waste solids are heated to separate out water and flow into the inclined rotating grate (108) for incineration. The solid ash residues generated by the incineration are continuously pushed to the right side for discharge. S2. The high-temperature flue gas generated by the incineration is extracted through the exhaust port (107) and enters the upper shell through the air inlet head (10691). At this time, the stirring shaft (10652) is driven to rotate by the motor (10651). The stirring shaft (10652) drives the petal cam (10613) and the blade (10614) to rotate. The petal cam (10613) squeezes the pulley (10610) to drive the sealing plug (10611) to move. The sealing plug (10611) The spring (10662) is driven to deform. When the extrusion surface of the petal cam (10613) is separated from the pulley (10610), the spring (10662) drives the sealing plug (10611) to reset until the petal cam (10613) squeezes the pulley (10610) again, thereby realizing the reciprocating motion of the sealing plug (10611), so that the gas discharged from the two air inlet heads (10691) is evenly convected and stirred by the blades (10614); S3, the high-temperature flue gas after convection is made to enter the upper chamber (10633) and the lower chamber (10631) downwardly, at which time the stirring shaft (10652) is mixed, and the reciprocating motion of the sealing plug (10611) also drives the first piston rod (10661) to reciprocate, and the second piston rod (10664) is driven by hydraulic pressure to realize the up and down shaking of the spiral path (10615), so that the spiral path (10615) drives the lower chamber (10631) to move up and down, and the volumes of the upper chamber (10633) and the lower chamber (10631) change reciprocatingly to realize the pressurized high-temperature flue gas to increase heat; S4, the high-temperature flue gas then enters the spiral channel (10615) and is mixed by shaking up and down. At the same time, the rotating shaft drives the polygonal rod (10681) to drive the sleeve (10682) to rotate, so that the sleeve (10682) drives the first bevel gear (10683) and the second bevel gear (10671) to transmit. At this time, the stirring rod (10672) rotates to further mix the high-temperature flue gas, so that the high-temperature flue gas flows along the spiral channel (10615) for multi-stage mixing; S5. After mixing, the mixture enters the hot smoke duct (114) through the high-temperature fan (111), a portion of which is diverted through the distribution pipe (109) into the smoke chamber (110) to serve as oxygen required for solid waste incineration, and the other portion enters the silo (103) to preheat the solid waste, and then flows through the cold smoke duct (113) and is discharged through another air inlet head (10691) for recycling.

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