Conveying system for multi-fuel combustion fuel of fluidized bed furnace

Abstract

The utility model discloses a conveying system for co-fired fuel of a fluidized bed furnace, which relates to the technical field of solid waste treatment equipment and comprises a Roots blower, a sealed buffer box, a purification ash bin, wood blocks, a filter plate, a conveying pipeline, a semi-coke powder bin, the fluidized bed furnace, a tail gas pipeline, a filter box, zeolite and an exhaust pipeline. The conveying pipeline has the advantages that wood blocks are mutually disordered and collided in the sealed buffer box, wood chips are formed in the collision process, purified ash is adsorbed by the wood chips, and meanwhile the purified ash and semi-coke powder in the conveying pipeline can be further scraped, so that the conveying pipeline is prevented from being blocked; the zeolite is utilized to adsorb organic matters contained in the tail gas of the calcium carbide furnace, so that the amount of the organic matters flowing into the exhaust pipeline is reduced, the blockage of the exhaust pipeline is avoided, and the tail gas of the calcium carbide furnace is obliquely upwards blown into the upper part of the fluidized bed furnace through the exhaust pipeline to be mixed with purified ash and semi-coke powder for combustion.

Description

Technical field:

[0001] The utility model relates to the technical field of solid waste treatment equipment, in particular to a conveying system for mixed-burning fuel in a fluidized bed furnace. Background technology:

[0002] Calcium carbide furnace and boiling furnace are used in the chemical production process. Among them, calcium carbide furnace is the main equipment for producing calcium carbide, and some purified ash and calcium carbide furnace tail gas will be produced in the process of producing calcium carbide.

[0003] Among them, the main components of purified ash include CaO, C, SiO2, AI2O3, Fe2O3, MgO and other substances, which have the characteristics of high temperature, fine particle size, light specific gravity, high viscosity, not easy to dissolve in water, easy to generate dust, and easy to spontaneously combust after contact with air. The temperature generated by its combustion is relatively low, usually not enough to be used alone for industrial incineration, so the traditional treatment method is landfill or stockpile, which occupies a lot of land and pollutes the environment;

[0004] The main components of calcium carbide furnace exhaust include combustible substances such as CO, CO2, H2, CH4, O2 and coal tar. The traditional treatment method is to discharge them, which not only pollutes the environment but also causes waste of resources.

[0005] Later, it was proposed that the purified ash, calcium carbide furnace exhaust gas and crushed powdered lignite be transported to a boiling furnace through a conveying system for mixed combustion. This would allow the purified ash and calcium carbide furnace exhaust gas to be recycled and reused to a certain extent, reducing the waste of resources.

[0006] The current defects are: due to the physical and chemical characteristics of purified ash, the volatile matter is relatively high, and it is very easy to adhere to the transport pipeline, causing blockage of the transport pipeline and affecting the normal operation of the transportation system; and the exhaust gas of the calcium carbide furnace contains some organic matter, which is also very easy to adhere to the transport pipeline, causing blockage of the transport pipeline and affecting the normal operation of the transportation system.

[0007] Therefore, the present application proposes a new conveying system to reduce the defects existing in the prior art. Utility model content:

[0008] The utility model aims to provide a fluidized bed furnace mixed combustion fuel delivery system to solve the problems raised in the above background technology.

[0009] The utility model is implemented by the following technical solutions:

[0010] A fluidized bed furnace mixed combustion fuel delivery system, comprising: a Roots blower, a sealed buffer box, a purified ash bin, a wood block, a filter plate, a transport pipeline, a blue carbon powder bin, a fluidized bed furnace, an exhaust pipeline, a filter box, zeolite and an exhaust pipeline;

[0011] The air outlet end of the Roots blower is connected to the air inlet end of the sealed buffer box through a pipeline, the feed end of the sealed buffer box is connected to the discharge port of the purified ash bin, a plurality of wooden blocks are placed in the sealed buffer box, a filter plate is fixed to the air outlet end of the sealed buffer box, the air outlet end of the sealed buffer box is connected to one end of the transport pipeline, the middle part of the transport pipeline is connected to the discharge port of the lignite powder bin, and the other end of the transport pipeline is passed through the top of the boiling furnace; one end of the exhaust pipeline is connected to the air inlet end of the filter box, zeolite is placed in the filter box, the air outlet end of the filter box is connected to one end of the exhaust pipeline, and the other end opening of the exhaust pipeline is obliquely upward and passed through the middle and lower part of the boiling furnace.

[0012] Preferably, the internal structure of the sealed buffer box is elliptical.

[0013] Preferably, a discharge valve is installed at the discharge port of the purified ash bin.

[0014] Preferably, a discharge valve is installed at the discharge port of the blue coke powder bin.

[0015] The advantages of the utility model are as follows: wood blocks collide chaotically with each other in a sealed buffer box to form wood chips during the collision, which are used to adsorb purified ash. At the same time, the purified ash and lignite powder in the transport pipeline can be further scraped off, thereby avoiding blockage in the transport pipeline; zeolite is used to adsorb organic matter contained in the exhaust gas of the calcium carbide furnace, reducing the amount of organic matter flowing into the exhaust pipeline, thereby avoiding blockage in the exhaust pipeline; the exhaust gas from the calcium carbide furnace is finally blown obliquely upward through the exhaust pipeline to the top of the boiling furnace to be mixed with the purified ash and lignite powder for combustion. Description of the drawings:

[0016] Figure 1 It is a schematic diagram of the system structure of the utility model.

[0017] In the figure: 1. Roots blower, 2. sealed buffer box, 3. purified ash bin, 4. wood block, 5. filter plate, 6. transport pipeline, 7. semi-coke powder bin, 8. boiling furnace, 9. exhaust pipeline, 10. filter box, 11. zeolite, 12. exhaust pipeline. Specific implementation method:

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1The utility model provides a technical solution for the transportation system of mixed-burning fuel in a fluidized bed furnace:

[0020] A fluidized bed furnace mixed combustion fuel delivery system, comprising: a Roots blower 1, a sealed buffer box 2, a purified ash bin 3, a wood block 4, a filter plate 5, a transport pipeline 6, a blue coke powder bin 7, a fluidized bed furnace 8, an exhaust pipeline 9, a filter box 10, a zeolite 11 and an exhaust pipeline 12;

[0021] The air outlet end of the Roots blower 1 is connected to the air inlet end of the sealed buffer box 2 through a pipeline. The internal structure of the sealed buffer box 2 is elliptical. The feed end of the sealed buffer box 2 is connected to the discharge port of the purified ash bin 3. A discharge valve is installed at the discharge port of the purified ash bin 3. A plurality of wood blocks 4 are placed in the sealed buffer box 2. A filter plate 5 is fixed to the air outlet end of the sealed buffer box 2. The air outlet end of the sealed buffer box 2 is connected to one end of a transport pipeline 6. The middle part of the transport pipeline 6 is connected to the discharge port of the blue coke powder bin 7. A discharge valve is installed at the discharge port of the blue coke powder bin 7. The other end of the transport pipeline 6 is inserted into the top of the boiling furnace 8.

[0022] During the blowing process of the Roots blower 1, the airflow enables multiple wood blocks 4 to collide chaotically inside the sealed buffer box 2, causing the transport pipe 6 to vibrate, thereby reducing the adhesion ability of the purified ash in the transport pipe 6. At the same time, the wood block material itself has a certain pore structure and can absorb some purified ash bins 3. After a long period of chaotic collision, the wood blocks will be damaged to form sawdust, and the sawdust will be blown into the transport pipe 6 together with the purified ash through the filter plate 5. Since the sawdust has a large particle size, the purified ash and lignite powder in the transport pipe 6 can be further scraped off by the sawdust, thereby avoiding blockage of the transport pipe 6.

[0023] One end of the exhaust pipe 9 is connected to the air inlet end of the filter box 10, and zeolite 11 is placed in the filter box 10. The air outlet end of the filter box 10 is connected to one end of the exhaust pipe 12, and the other end of the exhaust pipe 12 opens obliquely upward and penetrates the middle and lower part of the boiling furnace 8.

[0024] Zeolite is a natural microcrystalline precipitated substance with the characteristics of large specific surface area, strong adsorption capacity, high temperature resistance, acid and alkali corrosion resistance, etc. When the tail gas of the calcium carbide furnace enters the filter box 10, the tail gas of the calcium carbide furnace contacts with the zeolite, and the zeolite can effectively catalyze and oxidize the organic matter in the tail gas of the calcium carbide furnace, adsorb it, and convert it into harmless substances. The amount of organic matter flowing into the exhaust pipe 12 is reduced, thereby avoiding the blockage of the exhaust pipe 12. The tail gas of the calcium carbide furnace is finally blown upward obliquely into the top of the boiling furnace 8 through the exhaust pipe 12 to be mixed with the purified ash and blue carbon powder for combustion.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fluidized bed furnace mixed fuel delivery system, characterized in that: It comprises a Roots blower (1), a sealed buffer box (2), a purified ash bin (3), a wood block (4), a filter plate (5), a transport pipeline (6), a blue carbon powder bin (7), a fluidized bed furnace (8), an exhaust pipeline (9), a filter box (10), zeolite (11) and an exhaust pipeline (12); The air outlet end of the Roots blower (1) is connected to the air inlet end of the sealed buffer box (2) through a pipeline, the feed end of the sealed buffer box (2) is connected to the discharge port of the purified ash bin (3), a plurality of wood blocks (4) are placed in the sealed buffer box (2), a filter plate (5) is fixed to the air outlet end of the sealed buffer box (2), the air outlet end of the sealed buffer box (2) is connected to one end of the transport pipeline (6), and the middle part of the transport pipeline (6) is connected to the flange The exhaust gas pipe (9) is connected to the discharge port of the charcoal powder bin (7), and the other end of the transport pipe (6) is inserted into the top of the boiling furnace (8); one end of the exhaust gas pipe (9) is connected to the air inlet end of the filter box (10), and zeolite (11) is placed in the filter box (10); the air outlet end of the filter box (10) is connected to one end of the exhaust pipe (12), and the other end of the exhaust pipe (12) is opened and inserted into the middle and lower part of the boiling furnace (8) obliquely upward.

2. A fluidized bed furnace mixed fuel delivery system according to claim 1, characterized in that: The internal structure of the sealing buffer box (2) is elliptical.

3. A fluidized bed furnace mixed combustion fuel delivery system according to claim 1, characterized in that: A discharge valve is installed at the discharge port of the purified ash bin (3).

4. A fluidized bed furnace mixed combustion fuel delivery system according to claim 1, characterized in that: A discharge valve is installed at the discharge port of the blue coke powder bin (7).

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