RDF pilot burner

Abstract

The utility model discloses a RDF precombustion furnace relates to cement kiln collaborative disposal equipment technical field, including furnace body, air inlet pipe, feed pipe, expansion joint, the furnace body lower wall even articulates a plurality of combustion platform along its oblique direction, every combustion platform can switch between horizontal state and oblique state, when a part of combustion platform is in horizontal state and forms the combustion platform step, when a part of combustion platform is in oblique state and forms the oblique plane that supplies fuel to slide fast, the utility model discloses a plurality of combustion platform close to the expansion joint one side is adjusted to oblique state can make fuel along the inclined plane fast slide, realizes fuel fast discharge furnace body, on the contrary, when needing to increase the precombustion time of fuel in the furnace body, a plurality of combustion platform close to the feed pipe one side is adjusted to horizontal state, realizes the moving speed of fuel reduction, guarantees when the water content difference of industrial solid waste fuel exists, can adjust the precombustion time of fuel according to actual condition.

Description

Technical Field

[0001] This utility model relates to the technical field of cement kiln co-processing equipment, specifically an RDF pre-combustion furnace. Background Technology

[0002] Refuse-derived fuel (RDF) refers to the combustible portion of solid waste obtained after separation processes such as chopping, screening, and air separation to separate the combustible and non-combustible components. In the cement production process, using industrial solid waste as raw material in a pre-combustion furnace to achieve "harmless and resource-based treatment" of industrial solid waste is the best way to treat waste suitable for my country's national conditions.

[0003] For example, utility model patent CN221484227U discloses a pre-combustion furnace for alternative fuels in cement kilns. By setting the tertiary air inlet in a funnel shape, the stability of the tertiary air flow field inside the pre-combustion furnace can be ensured. By providing a feed inlet above the tertiary air inlet, it is convenient to feed the alternative fuel. The alternative fuel enters through the feed inlet and falls onto the steps of the pre-combustion furnace. During the falling process, the alternative fuel comes into full contact with the tertiary air. The alternative fuel with higher moisture content will evaporate some of the water in this process, and some of the lighter alternative fuel will also be carried away. The remaining larger particles of alternative fuel fall onto the steps and are then blown down the steps step by step, thus being fully combusted.

[0004] However, existing pre-combustion furnaces are not convenient for controlling the residence time of fuel in the furnace. When the moisture content of industrial solid waste fuel varies from batch to batch, if the pre-combustion time of fuel in the furnace is not adjusted, it may lead to incomplete pre-combustion or over-combustion, resulting in poor performance. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides an RDF pre-combustion furnace to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an RDF pre-combustion furnace, including a furnace body, an air inlet pipe, a feed pipe, and an expansion joint. The lower wall of the furnace body is uniformly hinged with multiple combustion platforms along its inclined direction. Each combustion platform can switch between a horizontal state and an inclined state. When a portion of the combustion platforms are in a horizontal state, a combustion step is formed. When a portion of the combustion platforms are in an inclined state, an inclined surface is formed for fuel to slide down rapidly.

[0007] Preferably, a telescopic tube is slidably disposed inside the lower wall of the furnace body and below each of the combustion platforms. A gas distribution pipe is installed at one end of the telescopic tube inside the furnace body, and multiple air nozzles are installed on the gas distribution pipe.

[0008] Preferably, a support block is fixedly installed on the gas distribution pipe, and a pad is fixedly installed on the lower surface of the combustion platform. The top of the support block abuts against the lower surface of the pad. When the telescopic pipe moves into the furnace body, it can push the combustion platform to a horizontal state. When the telescopic pipe moves out of the furnace body, it can push the combustion platform. When the combustion platform is in an inclined state, one end of it can overlap the combustion platform below.

[0009] Preferably, a telescopic rod is fixedly installed on the furnace body surface located on the outer side below each of the telescopic tubes, and the telescopic end of the telescopic rod is connected to the telescopic tube.

[0010] Preferably, the end of the telescopic pipe located outside the furnace body is connected to a gas supply unit.

[0011] Preferably, multiple observation windows are provided on both sides of the furnace body.

[0012] Beneficial effects

[0013] This utility model provides an RDF pre-combustion furnace with the following beneficial effects: when it is necessary to reduce the pre-combustion time of fuel in the furnace body, adjusting several combustion platforms near the expansion joint to an inclined state allows the fuel to slide down the inclined surface quickly, achieving rapid fuel discharge from the furnace body. Conversely, when it is necessary to increase the pre-combustion time of fuel in the furnace body, adjusting several combustion platforms near the feed pipe to a horizontal state reduces the fuel's movement speed, thereby increasing the pre-combustion time of fuel in the furnace body. This ensures that when there are differences in the moisture content of industrial solid waste fuel, the pre-combustion time of fuel can be adjusted according to the actual situation. Attached Figure Description

[0014] Figure 1 This is a front view of the internal structure of this utility model;

[0015] Figure 2 yes Figure 1 A magnified view of part A in the image.

[0016] In the diagram: 1. Furnace body; 2. Combustion platform; 3. Telescopic pipe; 4. Jet nozzle; 5. Gas supply unit; 6. Telescopic rod; 7. Gas distribution pipe; 8. Support block; 9. Pad block; 10. Observation window; 11. Air inlet pipe; 12. Feed pipe; 13. Expansion joint. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] Please see Figures 1-2This utility model provides a technical solution: an RDF pre-combustion furnace, including a furnace body 1, an air inlet pipe 11, a feed pipe 12, and an expansion joint 13. Multiple combustion platforms 2 are uniformly hinged to the lower wall of the furnace body 1 along its inclined direction. Each combustion platform 2 can switch between a horizontal state and an inclined state. When some combustion platforms 2 are in a horizontal state, a combustion platform 2 step is formed. When some combustion platforms 2 are in an inclined state, an inclined surface for fuel to slide down quickly is formed. The movement speed of fuel in the furnace body is controlled by adjusting the number of combustion platforms 2 in a horizontal state near the feed pipe 12, thereby controlling the time when fuel stays in the furnace body 1.

[0019] As an embodiment of this utility model, a telescopic pipe 3 is slidably arranged inside the lower wall of the furnace body 1 and below each combustion platform 2. An air distribution pipe 7 is installed at one end of the telescopic pipe 3 inside the furnace body 1. Multiple air nozzles 4 for injecting compressed air are installed on the air distribution pipe 7. Compressed air can be evenly introduced into the furnace body 1 through the multiple air nozzles 4 on the air distribution pipe 7.

[0020] As an embodiment of this utility model, a support block 8 is fixedly installed on the gas distribution pipe 7, and a pad block 9 is fixedly installed on the lower surface of the combustion platform 2. The top of the support block 8 abuts against the lower surface of the pad block 9. When the telescopic pipe 3 moves into the furnace body 1, it can push the combustion platform 2 to a horizontal state. When the telescopic pipe 3 moves out of the furnace body 1, it can push the combustion platform 2. When the combustion platform 2 is in an inclined state, one end of it can overlap the combustion platform 2 below, thereby covering the jet nozzle 4 that does not need to be sprayed, and playing a protective role for the jet nozzle 4.

[0021] As an embodiment of this utility model, a telescopic rod 6 is fixedly installed on the surface of the furnace body 1 located on the outer side below each telescopic tube 3. The telescopic end of the telescopic rod 6 is connected to the telescopic tube 3, and the telescopic tube 3 is driven to move into or out of the furnace body 1 by the telescopic rod 6.

[0022] As an embodiment of this utility model, the telescopic tube 3 is connected to an air supply part 5 for supplying air to the jet nozzle 4 at one end outside the furnace body 1.

[0023] As an embodiment of this utility model, multiple observation windows 10 are provided on both sides of the furnace body 1 to facilitate observation of the combustion situation inside the furnace body 1.

[0024] The working principle and usage process of this utility model are as follows: During use, fuel enters the furnace body 1 through the feed pipe. The combustion situation inside the furnace body 1 can be observed through the observation window 10. When it is necessary to reduce the pre-combustion time of the fuel in the furnace body 1, several combustion platforms 2 near the expansion joint 13 are adjusted to an inclined state. When the fuel moves above the inclined combustion platform 2, it can slide down its slope quickly, thus achieving rapid fuel discharge from the furnace body 1. Conversely, when it is necessary to increase the pre-combustion time of the fuel in the furnace body 1, several combustion platforms 2 near the feed pipe 12 are adjusted to a horizontal state. When the number of horizontal combustion platforms 2 increases, the fuel movement speed slows down, thereby increasing the pre-combustion time of the fuel in the furnace body 1. The movement speed of the fuel in the furnace body 1 is controlled by controlling the ratio of the number of horizontal combustion platforms 2 to inclined combustion platforms 2.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An RDF pre-combustion furnace, characterized in that, The furnace includes a furnace body (1), an air inlet pipe (11), a feed pipe (12), and an expansion joint (13). The lower wall of the furnace body (1) is evenly hinged with multiple combustion platforms (2) along its inclined direction. Each combustion platform (2) can switch between a horizontal state and an inclined state. When a portion of the combustion platforms (2) is in a horizontal state, a combustion platform (2) step is formed. When a portion of the combustion platforms (2) is in an inclined state, an inclined surface for fuel to slide down quickly is formed.

2. The RDF pre-combustion furnace according to claim 1, characterized in that, A telescopic tube (3) is slidably disposed inside the lower wall of the furnace body (1) and below each of the combustion platforms (2). A gas distribution pipe (7) is installed at one end of the telescopic tube (3) inside the furnace body (1), and multiple jet nozzles (4) are installed on the gas distribution pipe (7).

3. The RDF pre-combustion furnace according to claim 2, characterized in that, A support block (8) is fixedly installed on the gas distribution pipe (7), and a pad (9) is fixedly installed on the lower surface of the combustion platform (2). The top of the support block (8) abuts against the lower surface of the pad (9). When the telescopic pipe (3) moves into the furnace body (1), it can push the combustion platform (2) to a horizontal state. When the telescopic pipe (3) moves out of the furnace body (1), it can push the combustion platform (2). When the combustion platform (2) is in an inclined state, one end of it can be attached to the combustion platform (2) below.

4. An RDF pre-combustion furnace according to claim 2, characterized in that, A telescopic rod (6) is fixedly installed on the surface of the furnace body (1) located on the outer side below each of the telescopic tubes (3), and the telescopic end of the telescopic rod (6) is connected to the telescopic tube (3).

5. An RDF pre-combustion furnace according to claim 2, characterized in that, The telescopic tube (3) is connected to a gas supply unit (5) at one end outside the furnace body (1).

6. An RDF pre-combustion furnace according to claim 2, characterized in that, Multiple observation windows (10) are provided on both sides of the furnace body (1).

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