Tool for simulating fluidization state of circulating fluidized bed boiler

Abstract

The utility model discloses a tool for simulating the fluidization state of a circulating fluidized bed boiler. The tool comprises a simulation fluidization air device, a simulation air volume adjusting device, a simulation fluidization air duct, a simulation storage bin, a simulation bed material conveying pipeline, a simulation hearth dry bottom hopper device, a simulation fluidization air plate, a simulation hearth and a simulation fluidization air cap. According to the utility model, the air volume in the simulation hearth can be changed by adjusting the air volume of the fan, so that the real-time fluidization state of the bed material in the simulation hearth can be observed when different air volumes are conveyed, and an observer can conveniently observe the change of the fluidization state.

Description

Technical Field

[0001] The utility model relates to the field of boiler fluidization state, in particular to a tool for simulating the fluidization state of a circulating fluidized bed boiler. Background Art

[0002] The working principle of a circulating fluidized bed boiler can be briefly described as follows: the bed material is transported to the furnace through a storage bin, ignited and heated under the bed, and fluidized by a primary fan. After the fuel is crushed to a suitable particle size by a crusher, it is fed from the upper part of the air distribution plate in the combustion chamber through a coal feeder, mixed with the hot boiling bed material in the combustion chamber, and quickly heated. The fuel quickly ignites and burns, and under the action of a high air flow velocity, it fills the furnace and exchanges heat with the heating surface inside the furnace. The fluidization state of a circulating fluidized bed boiler is related to the safe operation of the boiler. Currently, the fluidization state of the boiler is monitored by means of bed pressure, furnace negative pressure, furnace temperature, etc. This monitoring method is relatively simple, and the monitoring personnel cannot directly see the specific distribution of the fluidization state of the bed material in the boiler body.

[0003] Therefore, a tooling for simulating the fluidization state of a circulating fluidized bed boiler is needed to solve the above problems. Utility Model Content

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A tool for simulating the fluidization state of a circulating fluidized bed boiler, comprising a simulated fluidizing air device, a simulated air volume regulating device, a simulated fluidizing air duct, a simulated material storage bin, a simulated bed material conveying pipeline, a simulated furnace cold ash hopper device, a simulated fluidizing air plate, a simulated furnace, and a simulated fluidizing air hood;

[0006] The simulated fluidized air device includes a fan and an air inlet pipe, the output end of the fan is connected to one end of the air inlet pipe, and the other end of the air inlet pipe is connected to one end of the simulated fluidized air duct; the simulated storage bin is arranged above the simulated furnace; one end of the simulated bed material conveying pipeline is connected to the bottom of the simulated storage bin, and the other end is connected to the inside of the simulated furnace; the lower end of the simulated furnace is connected to the top of the simulated furnace cold ash hopper device, and a sealed cavity is formed; a simulated fluidized air plate is arranged in the sealed cavity, the simulated fluidized air plate is fixedly connected to the top inner wall of the simulated furnace cold ash hopper device, a plurality of simulated fluidized air hoods are arranged on the simulated fluidized air plate, and the two ends of the simulated fluidized air hoods are respectively connected to the inside of the simulated furnace and the inside of the simulated furnace cold ash hopper device; one end of the simulated fluidized air duct is connected to the simulated furnace cold ash hopper device, and the simulated storage bin is used to place simulated bed material;

[0007] The air inlet pipe, simulated fluidizing air duct, simulated material storage bin, simulated bed material conveying pipeline, furnace ash cooling hopper device, simulated fluidizing air plate, simulated furnace, and simulated fluidizing air hood are made of transparent material;

[0008] The simulated air volume regulating device is electrically connected to the fan, and the simulated air volume regulating device is used to regulate the air volume of the fan.

[0009] Furthermore, the simulated storage bin is a hollow cubic structure with an open top.

[0010] The analog air volume adjustment device is a frequency converter.

[0011] Furthermore, a top plate for sealing the simulated material storage bin is also provided on the top of the simulated material storage bin, and the top plate is screwed to the simulated material storage bin.

[0012] Furthermore, the simulated fluidizing wind hood is a hollow cylindrical structure, and the simulated fluidizing wind hood is vertically connected to the simulated fluidizing wind plate.

[0013] Furthermore, the simulated fluidizing air duct has a Γ-shaped channel structure, and the lower end of the simulated fluidizing air duct is connected to the air inlet pipe.

[0014] Furthermore, the air inlet pipe, the simulated fluidized air duct, the simulated material storage bin, the simulated bed material conveying pipeline, the furnace cold ash hopper device, the simulated fluidized air plate, the simulated furnace, and the simulated fluidized air hood are made of transparent acrylic material.

[0015] Furthermore, the simulated bed material is POM plastic balls.

[0016] Furthermore, the tooling for simulating the fluidization state of a circulating fluidized bed boiler also includes a tail flue, which is connected to the top side wall of the simulated furnace, and the tail flue is used to discharge the gas in the simulated furnace to the outside of the simulated furnace.

[0017] Furthermore, a filter is provided at the connection point between the tail flue and the simulated furnace, and the filter is used to prevent the simulated bed material in the simulated furnace from being discharged from the tail flue.

[0018] Due to the adoption of the above technical scheme, the technical progress achieved by the utility model compared with the prior art is: the utility model can simulate the change of the air volume inside the furnace by adjusting the air volume of the fan, and then realize the real-time state of the fluidization of the bed material inside the furnace when observing different air volume delivery, so that observers can observe the changes in the fluidization state. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1This is a schematic diagram of the structure of a tooling for simulating the fluidization state of a circulating fluidized bed boiler according to the utility model;

[0021] Figure 2 Another schematic diagram of a tool for simulating the fluidization state of a circulating fluidized bed boiler according to the utility model;

[0022] Main component symbols

[0023] Simulated fluidizing air device 1 Analog air volume control device 2 Simulation fluidization air duct 3 Simulation storage silo 4 Simulation of bed material delivery pipeline 5 Simulated furnace ash hopper device 7 Simulated fluidization wind plate 8 Simulated furnace 9 Simulated fluidizing air hood 10 Top plate 11 Simulated bed material 12 Tail flue 6 Filter 61 Fan 101 Air inlet pipe 102

[0024] The following specific implementation will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0025] In order to make the technical personnel in the technical field better understand the scheme of the utility model, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by the technical personnel in the technical field of the utility model. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] See also Figure 1-2 The embodiment of the utility model provides a tool for simulating the fluidization state of a circulating fluidized bed boiler, including a simulated fluidizing air device 1, a simulated air volume regulating device 2, a simulated fluidizing air duct 3, a simulated material storage bin 4, a simulated bed material conveying pipeline 5, a simulated furnace cold ash hopper device 7, a simulated fluidizing air plate 8, a simulated furnace 9, and a simulated fluidizing air cap 10;

[0028] The simulated fluidized air device 1 includes a fan 101 and an air inlet pipe 102, the output end of the fan is connected to one end of the air inlet pipe 102, and the other end of the air inlet pipe 102 is connected to one end of the simulated fluidized air duct 3; the simulated storage bin 4 is a hollow cubic structure with an open top, and the simulated storage bin 4 is arranged above the simulated furnace 9; one end of the simulated bed material conveying pipeline 5 is connected to the bottom of the simulated storage bin 4, and the other end is connected to the inside of the simulated furnace 9; the lower end of the simulated furnace 9 is connected to the top of the simulated furnace cold ash hopper device 7 The parts are connected to form a sealed cavity; a simulated fluidizing wind plate 8 is provided in the sealed cavity, and the simulated fluidizing wind plate 8 is fixedly connected to the top inner wall of the simulated furnace cold ash hopper device 7, and a plurality of simulated fluidizing wind hoods 10 are provided on the simulated fluidizing wind plate 8, and the two ends of the simulated fluidizing wind hoods 10 are respectively connected to the interior of the simulated furnace 9 and the interior of the simulated furnace cold ash hopper device 7; one end of the simulated fluidizing air duct 3 is connected to the simulated furnace cold ash hopper device 7, and the simulated storage bin 4 is used to place the simulated bed material 12.

[0029] The simulated air volume regulating device 2 is electrically connected to the fan 101 , and the simulated air volume regulating device 2 is used to regulate the air volume of the fan 101 .

[0030] The simulated air volume regulating device 2 is a frequency converter.

[0031] Furthermore, a top plate 11 for sealing the simulated material storage bin 4 is also provided on the top of the simulated material storage bin 4 , and the top plate 11 is screwed to the simulated material storage bin 4 .

[0032] Furthermore, the simulated fluidizing wind hood 10 is a hollow cylindrical structure, and the simulated fluidizing wind hood 10 is vertically connected to the simulated fluidizing wind plate 8 .

[0033] Furthermore, the simulated fluidizing air duct 3 presents a Γ-shaped channel structure, and the lower end of the simulated fluidizing air duct 3 is connected to the air inlet pipe 102 .

[0034] Furthermore, the air inlet pipe 102, the simulated fluidizing air duct 3, the simulated material storage bin 4, the simulated bed material conveying pipeline 5, the furnace cold ash hopper device 7, the simulated fluidizing air plate 8, the simulated furnace 9, and the simulated fluidizing air hood 10 are made of transparent material.

[0035] Furthermore, the air inlet pipe 102, the simulated fluidizing air duct 3, the simulated storage bin 4, the simulated bed material conveying pipeline 5, the furnace cold ash hopper device 7, the simulated fluidizing air plate 8, the simulated furnace 9, and the simulated fluidizing air hood 10 are made of transparent acrylic material.

[0036] Furthermore, the simulated bed material is POM plastic balls.

[0037] Furthermore, the tooling for simulating the fluidization state of the circulating fluidized bed boiler also includes a tail flue 6, which is connected to the top side wall of the simulated furnace 9, and the tail flue 6 is used to discharge the gas in the simulated furnace 9 to the outside of the simulated furnace 9.

[0038] Furthermore, a filter screen 61 is provided at the connection point between the tail flue 6 and the simulated furnace 9, and the filter screen 61 is used to prevent the simulated bed material 12 in the simulated furnace 9 from being discharged from the tail flue 6. The filter screen 61 is provided above a plurality of simulated fluidizing air hoods 10.

[0039] When the utility model is used, the simulated bed material 12 is put into the simulated storage bin 4, and the simulated storage bin 4 is sealed with the top plate 11, the simulated bed material 12 enters the simulated furnace 9 through the simulated bed material conveying pipe 5, and the wind of the fan 101 passes through the simulated fluidizing air duct 3, the furnace cold ash hopper device 7, and a plurality of simulated fluidizing air hoods 10 in sequence to reach the simulated furnace 9, and the air volume of the fan 101 is adjusted to the minimum through the simulated air volume regulating device 2. By changing the air volume of the fan 101 and changing the amount of simulated bed material 12 put into the simulated storage bin 4, the different fluidization states of the simulated bed material 12 in the simulated furnace 9 are observed, and the observer finds a fluidization state that is most suitable for safe operation through the changes in the fluidization state, and records the opening of the simulated air volume regulating device 2 and the amount of simulated bed material 12.

[0040] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A tool for simulating the fluidization state of a circulating fluidized bed boiler, characterized in that: It includes a simulated fluidizing air device, a simulated air volume regulating device, a simulated fluidizing air duct, a simulated material storage bin, a simulated bed material conveying pipeline, a simulated furnace cold ash hopper device, a simulated fluidizing air plate, a simulated furnace, and a simulated fluidizing air hood; The simulated fluidized air device includes a fan and an air inlet pipe, the output end of the fan is connected to one end of the air inlet pipe, and the other end of the air inlet pipe is connected to one end of the simulated fluidized air duct; the simulated storage bin is arranged above the simulated furnace; one end of the simulated bed material conveying pipeline is connected to the bottom of the simulated storage bin, and the other end is connected to the inside of the simulated furnace; the lower end of the simulated furnace is connected to the top of the simulated furnace cold ash hopper device, and a sealed cavity is formed; a simulated fluidized air plate is arranged in the sealed cavity, the simulated fluidized air plate is fixedly connected to the top inner wall of the simulated furnace cold ash hopper device, a plurality of simulated fluidized air hoods are arranged on the simulated fluidized air plate, and the two ends of the simulated fluidized air hoods are respectively connected to the inside of the simulated furnace and the inside of the simulated furnace cold ash hopper device; one end of the simulated fluidized air duct is connected to the simulated furnace cold ash hopper device, and the simulated storage bin is used to place simulated bed material; The air inlet pipe, simulated fluidizing air duct, simulated material storage bin, simulated bed material conveying pipeline, furnace cold ash hopper device, simulated fluidizing air plate, simulated furnace, and simulated fluidizing air hood are made of transparent material; The simulated air volume regulating device is electrically connected to the fan, and the simulated air volume regulating device is used to regulate the air volume of the fan.

2. The tooling for simulating the fluidization state of a circulating fluidized bed boiler according to claim 1, characterized in that: A top plate for sealing the simulated material storage bin is also arranged on the top of the simulated material storage bin, and the top plate is screwed to the simulated material storage bin.

3. The tooling for simulating the fluidization state of a circulating fluidized bed boiler according to claim 1, characterized in that: The simulated fluidized air hood is a hollow cylindrical structure, and the simulated fluidized air hood is vertically connected to the simulated fluidized air plate.

4. The tooling for simulating the fluidization state of a circulating fluidized bed boiler according to claim 1, characterized in that: The simulated fluidization air duct is a Γ-shaped channel structure, and the lower end of the simulated fluidization air duct is connected to the air inlet pipe.

5. The tooling for simulating the fluidization state of a circulating fluidized bed boiler according to claim 1, characterized in that: The air inlet pipe, simulated fluidizing air duct, simulated material storage bin, simulated bed material conveying pipeline, furnace cold ash hopper device, simulated fluidizing air plate, simulated furnace, and simulated fluidizing air hood are made of transparent acrylic material.

6. The tooling for simulating the fluidization state of a circulating fluidized bed boiler according to claim 1, characterized in that: The simulated bed material is POM plastic balls.

7. The tooling for simulating the fluidization state of a circulating fluidized bed boiler according to claim 1, characterized in that: The tooling for simulating the fluidization state of a circulating fluidized bed boiler also includes a tail flue, which is connected to the top side wall of the simulated furnace, and is used to discharge the gas in the simulated furnace to the outside of the simulated furnace.

8. The tooling for simulating the fluidization state of a circulating fluidized bed boiler according to claim 7, characterized in that: A filter is arranged at the connection point between the tail flue and the simulated furnace, and the filter is used to prevent the simulated bed material in the simulated furnace from being discharged from the tail flue.

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