CN211424468U

CN211424468U - Adjustable spiral multi-stage oil-free coal powder igniter

Info

Publication number: CN211424468U
Application number: CN202020075358.1U
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-09-04
Anticipated expiration: 2030-01-14

Abstract

The utility model discloses an adjustable spiral multi-stage oilless pulverized coal igniter, belonging to the technical field of combustion equipment; the technical problem to be solved is to provide an adjustable spiral type multistage oil-free pulverized coal igniter which realizes oil-free ignition and stable combustion and has a large adaptation range to coal types; the technical scheme is as follows: including one-level combustion chamber and second grade combustion chamber, the structure of one-level combustion chamber is: the heating core is sleeved inside the cylindrical heat storage layer, the heating core is in a structure that a spiral blade is fixed on the outer circular surface of the circular shaft, a circle of heat insulation layer is arranged on the outer circular surface of the heat storage layer at a position corresponding to the heating core, and a plurality of induction coils are wound outside the heat insulation layer; the structure of the secondary combustion chamber is as follows: the two ends of the shell are opened, the outer side of one end is provided with a secondary combustion fuel inlet, and a secondary combustion swirler is arranged in the shell; one end of the primary combustion chamber is a primary combustion fuel inlet, the other end of the primary combustion chamber is connected with one end of the secondary combustion chamber, and the other end of the secondary combustion chamber is a flame outlet; the utility model is used for the buggy is igniteed.

Description

Adjustable spiral multi-stage oil-free coal powder igniter

Technical Field

The utility model discloses adjustable spiral multistage oilless pulverized coal igniter belongs to combustion apparatus technical field, especially relates to a spiral, need not the pulverized coal igniter of fuel completely.

Background

With the increasing requirement of environmental protection, the prior burners used for the rotary kiln of the coal-fired boiler and other burners needing ignition and stable combustion need to be ignited by fuel oil, stabilize combustion and deeply regulate peak, a large amount of fuel oil is needed, the environment is not protected and is not economical, the plasma ignition in recent years can achieve the effects of oil-free ignition, stable combustion and deeply regulate peak, but the requirement on the coal type is limited, the low-heat value coal cannot be directly ignited, so that the application of the low-heat value coal is limited, and other oil-free ignition devices are continuously appeared in recent years, but are limited by high-temperature resistant materials and structures, certain defects exist in safety performance, and the application of the large-scale boiler has larger risk in safety.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes prior art exists not enough, the technical problem that solve for provide one kind have realized that oil-free ignition and stable burning just to the big adjustable spiral multistage oilless buggy point firearm of coal kind accommodation.

In order to solve the technical problem, the utility model discloses a technical scheme be: adjustable spiral multistage oilless pulverized coal igniter, including one-level combustion chamber and second grade combustion chamber, the structure of one-level combustion chamber is: the heating core is sleeved inside the cylindrical heat storage layer, the heating core is of a structure that a spiral blade is fixed on the outer circular surface of the circular shaft, the outer diameter of the spiral blade is matched with the inner diameter of the heat storage layer, a spiral pulverized coal channel is formed among the outer circular surface of the circular shaft, the spiral blade and the inner wall of the heat storage layer, a circle of heat insulation layer is arranged on the outer circular surface of the heat storage layer at a position matched with the heating core, and a plurality of induction coils are wound outside the heat insulation layer;

the heating core is provided with a circular shaft and a helical blade which are of an integral structure.

The structure of the secondary combustion chamber is as follows: the two ends of the shell are opened, the outer side of one end is provided with a secondary combustion fuel inlet, and a secondary combustion swirler is arranged in the shell;

one end of the primary combustion chamber is a primary combustion fuel inlet, the other end of the primary combustion chamber is connected with one end of the secondary combustion chamber, and the other end of the secondary combustion chamber is a flame outlet.

Furthermore, a round shaft in the heating core is a hollow round pipe.

Furthermore, one end of the heating core close to the secondary combustion chamber is provided with a conical primary bluff body.

Further, a secondary bluff body is arranged between the secondary combustion swirler and the flame outlet, and the secondary bluff body is a slotted bluff body.

Furthermore, a heat insulation layer is arranged on the inner wall of the shell.

Preferably, the heat storage layer is made of a high-temperature resistant material.

Compared with the prior art, the utility model following beneficial effect has.

1. The utility model discloses the core that generates heat of well design utilizes helical structure greatly increased the dwell time of fuel in the core department that generates heat, is about several times of straight-flow, and the volume of equipment that can significantly reduce has guaranteed the coal dust simultaneously and is generating heat the heat transfer area of in-core, makes the coal dust can fully split into combustible gas to realized lighting the purpose of buggy, through adjusting the temperature or the length of the core that generates heat in addition, can light different coal types, thereby make the utility model discloses widen greatly the accommodation to the coal type.

2. The utility model provides a core generates heat, the design is hollow pipe external fixation helical blade's structure, when using, wind coal mixture gets into from one-level combustion fuel import, most follow the entering of spiral buggy passageway, the subtotal gets into from the pipe, and fast in the pipe, spiral buggy passageway department velocity of flow is slower relatively, thus, certain negative pressure zone has been formed in the core exit that generates heat, make spiral buggy passageway exit resistance reduce, the wind coal mixture of being convenient for is unobstructed to pass through in spiral buggy passageway.

3. The utility model discloses in set up one-level bluff body and second grade bluff body, can form the backward flow district behind the bluff body, the high temperature flue gas of backward flow district can make the further burning of fuel.

4. The utility model discloses an in the second grade combustion chamber, be provided with thermal-insulated heat preservation, when fuel burns in the second grade combustion chamber, can heat the thermal-insulated layer that keeps warm, when heating to the uniform temperature, can reverse to fuel heating, make the further schizolysis of fuel.

5. The utility model provides a heat accumulation layer adopts high temperature resistant material preparation, and wear resistance is good very much, and the antiscour ability is strong, has improved life greatly.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1 is the one-level combustion chamber, 11 is the core that generates heat, 111 is the round axle, 112 is helical blade, 12 is the heat accumulation layer, 13 is the buggy passageway, 14 is the heat preservation, 15 is induction coil, 16 is the one-level combustion fuel inlet, 17 is the one-level bluff body, 2 is the second grade combustion chamber, 21 is the shell, 22 is the heat preservation insulating layer, 23 is the second grade combustion fuel import, 24 is the second grade combustion swirler, 25 is the flame export, 26 is the second grade bluff body.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses adjustable spiral multistage oilless buggy point firearm, including one-level combustion chamber 1 and second grade combustion chamber 2, the structure of one-level combustion chamber 1 is: the heating core 11 is sleeved inside the cylindrical heat storage layer 12, the heating core 11 is of a structure that a spiral blade 112 is fixed on the outer circular surface of a circular shaft 111, the outer diameter of the spiral blade 112 is matched with the inner diameter of the heat storage layer 12, a spiral pulverized coal channel 13 is formed among the outer circular surface of the circular shaft 111, the spiral blade 112 and the inner wall of the heat storage layer 12, a circle of heat insulation layer 14 is arranged on the outer circular surface of the heat storage layer 12 in a position matched with the heating core 11, and a plurality of induction coils 15 are wound outside the heat insulation layer 14;

the round shaft 111 and the helical blade 112 in the heating core 11 are of an integral structure;

the structure of the secondary combustion chamber 2 is as follows: two ends of the shell 21 are open, a secondary combustion fuel inlet 23 is arranged on the outer side of one end, and a secondary combustion swirler 24 is arranged inside the shell 21;

one end of the primary combustion chamber 1 is a primary combustion fuel inlet 16, the other end of the primary combustion chamber is connected with one end of the secondary combustion chamber 2, and the other end of the secondary combustion chamber 2 is a flame outlet 25.

Further, the circular shaft 111 of the heat generating core 11 is a hollow circular tube.

Further, one end of the heating core 11 close to the secondary combustion chamber 2 is provided with a conical primary bluff body 17.

Further, a secondary bluff body 26 is arranged between the secondary combustion swirler 24 and the flame outlet 25, and the secondary bluff body 26 is a slotted bluff body.

Further, a layer of heat insulation layer 22 is arranged on the inner wall of the outer shell 21.

Preferably, the heat storage layer 12 is made of a high temperature resistant material.

The working process of the utility model is as follows:

in the primary combustion chamber 1, the induction coil 15 rapidly heats the heat storage layer 12 and the heating core 11 through medium frequency induction, the heating core 11 can be rapidly heated to a temperature higher than 800 ℃ from normal temperature, the primary combustion fuel enters from the primary combustion fuel inlet 16, most of the primary combustion fuel passes through the spiral coal powder channel 13, the rest part of the primary combustion fuel passes through the middle of the heating core 11, in the passing process, the heating core 11 and the heat storage layer 12 heat the wind-coal mixture, the fuel volatilizes, the fuel starts to burn at 1/3 behind the coal powder channel 13 after being fully cracked, after the coal powder channel 13 is out, a backflow area is formed under the action of the primary blunt body 17, the fuel further burns and then enters the secondary combustion chamber 2, the secondary combustion fuel enters from the secondary combustion fuel inlet 23 and then enters the secondary combustion swirler 24 to form a rotational flow, the fuel fully reacts to form a wind-over fire phenomenon, while passing through the secondary bluff body 26, a recirculation zone is formed again, allowing further combustion of the fuel and the resulting combustion flame to exit the flame exit 25.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. Adjustable spiral multistage oilless coal powder point firearm, including one-level combustion chamber (1) and second grade combustion chamber (2), its characterized in that: the structure of the primary combustion chamber (1) is as follows: the heating core (11) is sleeved inside the cylindrical heat storage layer (12), the heating core (11) is of a structure that a spiral blade (112) is fixed on the outer circular surface of a circular shaft (111), the outer diameter of the spiral blade (112) is adaptive to the inner diameter of the heat storage layer (12), a spiral coal powder channel (13) is formed among the outer circular surface of the circular shaft (111), the spiral blade (112) and the inner wall of the heat storage layer (12), a circle of heat insulation layer (14) is arranged on the outer circular surface of the heat storage layer (12) at a position adaptive to the heating core (11), and a plurality of induction coils (15) are wound outside the heat insulation layer (14);

the structure of the secondary combustion chamber (2) is as follows: two ends of the shell (21) are opened, the outer side of one end is provided with a secondary combustion fuel inlet (23), and a secondary combustion swirler (24) is arranged inside the shell (21);

one end of the primary combustion chamber (1) is a primary combustion fuel inlet (16), the other end of the primary combustion chamber is connected with one end of the secondary combustion chamber (2), and the other end of the secondary combustion chamber (2) is a flame outlet (25).

2. The adjustable spiral multi-stage oil-free pulverized coal igniter as claimed in claim 1, wherein: the round shaft (111) in the heating core (11) is a hollow round pipe.

3. The adjustable spiral multi-stage oil-free pulverized coal igniter as claimed in claim 1 or 2, wherein: one end of the heating core (11) close to the secondary combustion chamber (2) is provided with a conical primary bluff body (17).

4. The adjustable spiral multi-stage oil-free pulverized coal igniter as claimed in claim 1 or 2, wherein: a secondary bluff body (26) is arranged between the secondary combustion swirler (24) and the flame outlet (25), and the secondary bluff body (26) is a slotted bluff body.

5. The adjustable spiral multi-stage oil-free pulverized coal igniter as claimed in claim 1 or 2, wherein: the inner wall of the shell (21) is provided with a layer of heat preservation and insulation layer (22).

6. The adjustable spiral multi-stage oil-free pulverized coal igniter as claimed in claim 1 or 2, wherein: the heat storage layer (12) is made of high-temperature resistant materials.