CN201475988U

CN201475988U - Fly ash recirculation device

Info

Publication number: CN201475988U
Application number: CN200920139183XU
Authority: CN
Inventors: 刘伟; 陈飞; 叶承勇; 李传强; 黄龙飞; 徐立俊; 饶盛进; 吴金玲
Original assignee: Xiamen Yinlu Heavy Industry Co Ltd
Current assignee: Xiamen Yinlu Heavy Industry Co Ltd
Priority date: 2009-06-24
Filing date: 2009-06-24
Publication date: 2010-05-19
Anticipated expiration: 2019-06-24

Abstract

The utility model discloses a fly ash recirculation device. The device comprises an ash collecting hopper, an upper on-off valve, a flow guide ash bin, a lower on-off valve, an ash falling pipe, an air inlet pipe, and a flow guide pipe, wherein, the upper on-off valve is mounted between the ash collecting hopper and the flow guide ash bin; the lower on-off valve is mounted between the flow guide ash bin and the ash falling pipe; the inlet end of the flow guide pipe is connected to the side wall of the flow guide ash bin and is communicated with the inner chamber of the flow guide ash bin; the output end of the flow guide pipe is communicated with the main combustion zone of a hearth; the air inlet pipe is mounted on the side wall of the flow guide ash bin; and the air outlet of the air inlet pipe is communicated with the inlet of the flow guide pipe. In the utility model, the upper on-off valve and the lower on-off valve are respectively arranged at the upper and the lower parts of the flow guide ash bin, and the pipelines of the air inlet pipe and the flow guide pipe are arranged in the passage between the two valves, so that fly ash in the passage is blown to the flow guide pipe by air entering from the air inlet pipe, and then enters a combustion high-temperature zone again to participate in combustion through the flow guide pipe. Therefore, the utility model has the advantages that the boiler combustion efficiency is greatly improved, and the heat loss is low.

Description

The flying dust EGR

Technical field

The utility model relates to a kind of boiler, particularly relates to a kind of flying dust EGR.

Background technology

Fast assembling chain grate boiler, its compact conformation, small investment, advantage such as installation period is short, and is simple to operate, easy to maintenance and being applied.This type boiler divides the assembling of two big parts, boiler by up and down two form, two big parts behind the zoarium, carry out can coming into operation after part furnace wall, water power, blower fan, the pipeline installation on-site.Upper body comprises the both walls water-cooling wall, front-back wall water-cooling wall and convection bank part.The traveling-grate stoker of forward and backward, two side walls and bottom, front and back chimney arch and bottom side wall are formed burner hearth, organize the burning of fuel and absorb radiations heat energy; The bottom comprises coal bunker, traveling-grate stoker etc.Combustion apparatus adopts the light-duty traveling-grate stoker of being convenient to safeguard.Fire coal enters on the fire grate by adding coal bunker, falls into mucking machine and discharge after burning.Air enters fire grate bottom subregion and enters siege from the air channel, cause the economizer of independent layout behind high-temperature flue gas (these several words have repeated) the process secondary backhaul of the falling S transversal flow convection heating surface after the high-temperature flue gas that fire coal produces in burning back on the grate burns, air preheater enters deduster, air-introduced machine is discharged through chimney at last.

This model semi-packaged boiler is owing to be subjected to the restriction of shipping height, and the burner hearth of boiler is arranged relatively low, and flying dust time of staying in burner hearth is short, fails completing combustion.The supporting device of existing semi-packaged boiler all can not be carried the high-temperature flue gas that comes out from burner hearth secretly a large amount of unburnt fuel particles and send the high-temperature region back to and participate in burning again, but after by ash bucket flying dust being collected, by the vertical discharge device of opening/shutting valve, thereby a large amount of unburnt fuel particles are discharged to chain fire-gate low-temperature space, cause the solid imperfect combustion, heat loss is big, and the thermal efficiency of boiler is low.(could change " cause the solid incomplete combustion loss to increase, the thermal efficiency of boiler reduces " into)

The utility model content

The purpose of this utility model is to provide a kind of heat loss big (heat loss is little), the flying dust EGR that the thermal efficiency is high.

For achieving the above object, technical solution of the present utility model is:

The utility model is a kind of flying dust EGR, it comprise flue-dust retainer, on open and close valve, water conservancy diversion Hui Cang, keying valve, ash tube, blast pipe, mozzle down; Contract in the described flue-dust retainer lower part outlet be communicated with water conservancy diversion ash storehouse, described ash tube be arranged on water conservancy diversion Hui Cang bottom and with water conservancy diversion ash storehouse be integral member; The described keying valve of going up is installed between flue-dust retainer and the water conservancy diversion ash storehouse, and following keying valve is installed between water conservancy diversion ash storehouse and the ash tube; The arrival end of described mozzle is connected on the sidewall in water conservancy diversion ash storehouse and with water conservancy diversion ash storehouse inner chamber and is communicated with, and its port of export is communicated with the main combustion zone of burner hearth; Described blast pipe is installed on the sidewall in water conservancy diversion ash storehouse and the inlet of air outlet and mozzle relative.

Described mozzle bending is downward, and the main combustion zone of the relative burner hearth of its outlet port.

After adopting such scheme, because the upper and lower of the utility model in water conservancy diversion ash storehouse is provided with respectively and opens and closes valve and following keying valve, in two valve center-aisle parts (that is: water conservancy diversion ash storehouse) blast pipe and two pipelines of mozzle are set, wind enters from blast pipe the flying dust of passage is sent into mozzle and reentered the participation burning of combustion high temperature zone by mozzle, thereby improved boiler combustion efficiency greatly, heat loss is little.

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the cutaway view of Fig. 1 along the A-A line.

The specific embodiment

As shown in Figure 1 and Figure 2 be the overall structure of boiler, it comprise heating surface 6 behind burner hearth 1, face arch 2, rear arch 3, fire grate 4, drum 5, the burner hearth, flue-dust retainer 7, on open and close valve 81, wall 12, main combustion zone 13, burning low-temperature space 14, water conservancy diversion ash storehouse 15, ash tube 16, air 17, fuel 18, wind storehouse 19 behind keying valve 82, blast pipe 9, mozzle 10, burner hearth front wall 11, the burner hearth down.

As shown in Figure 1, flying dust EGR of the present utility model comprise flue-dust retainer 7, on open and close valve 81, water conservancy diversion ash storehouse 15, keying valve 82, ash tube 16, blast pipe 9, mozzle 10 down.

Contract in the described flue-dust retainer 7 lower part outlet be communicated with water conservancy diversion ash storehouse 15, described ash tube 16 is arranged on water conservancy diversion ash 15 bottoms, storehouse and is integral member with water conservancy diversion ash storehouse 15; The described valve 81 that go up to open and close is installed between flue-dust retainer 7 and the water conservancy diversion ash storehouse 15, and following keying valve 82 is installed between water conservancy diversion ash storehouse 15 and the ash tube 16, on open and close valve 81 and can open respectively or close with following keying valve 82; The bending of described mozzle 10 mozzles downwards, its arrival end is connected on the sidewall in water conservancy diversion ash storehouse 15 and with water conservancy diversion ash storehouse 15 inner chambers and is communicated with, the main combustion zone 13 of its port of export and burner hearth 1 connection and relative burner hearth; Described blast pipe 9 is installed on the sidewall in water conservancy diversion ash storehouse 15 and the inlet of its air outlet and mozzle 10 relative, so that the air that is blown into can be blown into unburnt flying dust mozzle 10 and reenter 13 territories, combustion high temperature district by mozzle 10.

Operation principle of the present utility model:

Fuel (coal) 18 produces a large amount of high-temperature flue gas after burning on the fire grate 4.In combustion process, smaller particles is risen by air compartment 19 hollow air-blowings, and a part enters rear portion heating surface 6 with the high-temperature flue gas burner hearth 1 of flowing through, this part particle is short in the burner hearth time of staying, fail completing combustion, the heating surface district separates by inertial collision in the back, falls in the flue-dust retainer 7.Put into water conservancy diversion ash storehouse 15 by last keying valve 81, air enters water conservancy diversion ash storehouse 15 by blast pipe 9, the unburnt particle in the water conservancy diversion ash storehouse 15, delivers to the high main combustion zone of fire grate temperature through mozzle 10, continues to participate in burning.

Emphasis of the present utility model just is: the mozzle that is provided with double valve and is connected with main combustion zone.

The above, it only is the utility model preferred embodiment, so can not limit the scope that the utility model is implemented with this, i.e. the equivalence of doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model patent contains.

Claims

1. flying dust EGR is characterized in that: it comprise flue-dust retainer, on open and close valve, water conservancy diversion Hui Cang, keying valve, ash tube, blast pipe, mozzle down; Contract in the described flue-dust retainer lower part outlet be communicated with water conservancy diversion ash storehouse, described ash tube be arranged on water conservancy diversion Hui Cang bottom and with water conservancy diversion ash storehouse be integral member; The described keying valve of going up is installed between flue-dust retainer and the water conservancy diversion ash storehouse, and following keying valve is installed between water conservancy diversion ash storehouse and the ash tube; The arrival end of described mozzle is connected on the sidewall in water conservancy diversion ash storehouse and with water conservancy diversion ash storehouse inner chamber and is communicated with, and its port of export is communicated with the main combustion zone of burner hearth; Described blast pipe is installed on the sidewall in water conservancy diversion ash storehouse and the inlet of air outlet and mozzle relative.

2. flying dust EGR according to claim 1 is characterized in that: described mozzle bending is downward, and the main combustion zone of the relative burner hearth of its outlet port.