CN210662862U

CN210662862U - External reheating type waste incineration boiler

Info

Publication number: CN210662862U
Application number: CN201921222646.9U
Authority: CN
Inventors: 沈竑; 孙亚鹏; 曹森
Original assignee: Shenzhen Energy Environmental Engineering Co Ltd
Current assignee: Shenzhen Energy and Environmental Protection Co Ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-06-02
Anticipated expiration: 2029-07-29

Abstract

The utility model provides a pair of external re-heating formula msw incineration boiler, including burning furnace and exhaust-heat boiler, exhaust-heat boiler comprises the economizer pipe case that drum, reheater, three perpendicular membrane wall, a convection current horizontal flue and afterbody U-shaped were arranged, first medium temperature over heater, high temperature over heater, second medium temperature over heater, first low temperature over heater and second low temperature over heater are arranged in proper order to the convection current horizontal flue, exhaust-heat boiler's drum, perpendicular membrane wall, convection current horizontal flue and wherein all over heaters all adopt the linkage installation fixed, the reheater adopts the dividing wall formula structure, and intraductal be saturated steam, the outside of tubes is reheat steam. The reheater is external to the flue, and is hung above the flue by a hanging device. The utility model discloses can improve the steam parameter, increase the acting capacity of steam, avoid arranging the reheater in the safety problems such as high temperature corrosion that produce in the flue.

Description

External reheating type waste incineration boiler

Technical Field

The utility model discloses waste incinerator, concretely relates to external reheat formula waste incinerator.

Background

With the improvement of the living standard of people in China, the output of domestic garbage is obviously increased, the number of corresponding garbage incineration power plants is increased day by day, the steam parameters of the existing garbage incineration power plants mostly adopt medium-temperature medium-pressure parameters, and the power generation efficiency of the garbage incineration power plants can be effectively improved by improving the steam parameters. However, in the conventional steam reheating technology for waste incineration power generation, a reheater is arranged in a flue, and the method has the problems of high-temperature corrosion, great influence of boiler load fluctuation and the like.

SUMMERY OF THE UTILITY MODEL

For solving the above problem, the utility model provides an external re-heating formula msw incineration boiler, its thermal efficiency that can effectively improve the boiler and the whole generating efficiency of power plant improves the economic benefits of power plant greatly.

The utility model provides a technical scheme that technical problem adopted as follows: an external reheating type garbage incineration boiler comprises an incinerator and a waste heat boiler,

the waste heat boiler consists of a steam drum, a reheater, three vertical membrane type water-cooled walls, a convection horizontal flue and an economizer pipe box arranged in a U shape at the tail part,

the convection horizontal flue is sequentially provided with a first middle-temperature superheater, a high-temperature superheater, a second middle-temperature superheater, a first low-temperature superheater and a second low-temperature superheater,

the steam pocket, the vertical membrane type water-cooled wall, the convection horizontal flue and all the superheaters in the steam pocket, the vertical membrane type water-cooled wall and the convection horizontal flue of the waste heat boiler are fixedly installed by adopting a suspension device,

the reheater adopts a dividing wall type structure, saturated steam is arranged in the tube, reheated steam is arranged outside the tube,

the first medium temperature superheater is arranged in an in-line countercurrent manner, the high temperature superheater is arranged in an in-line concurrent manner, the second medium temperature superheater is arranged in an in-line countercurrent manner, the first low temperature superheater is arranged in an in-line countercurrent manner, the second low temperature superheater is arranged in an in-line countercurrent manner,

the method is characterized in that the reheater is externally arranged on the flue, and a hanging device is adopted to hang the reheater above the flue.

The utility model discloses an optimal scheme does, the condensate water after the reheater heat transfer returns the steam pocket.

The utility model discloses an optimal scheme does, the condensate water after the re-heater heat transfer gets into perpendicular membrane wall heating.

The utility model has the advantages that: the utility model provides a pair of external re-heating formula msw incineration boiler, including burning furnace and exhaust-heat boiler, exhaust-heat boiler comprises the economizer pipe case that drum, reheater, three perpendicular membrane wall, a convection current horizontal flue and afterbody U-shaped were arranged, first medium temperature over heater, high temperature over heater, second medium temperature over heater, first low temperature over heater and second low temperature over heater are arranged in proper order to the convection current horizontal flue, exhaust-heat boiler's drum, perpendicular membrane wall, convection current horizontal flue and wherein all over heaters all adopt the linkage installation fixed, the reheater adopts the dividing wall formula structure, and intraductal be saturated steam, the outside of tubes is reheat steam. The reheater is external to the flue, and is hung above the flue by a hanging device. The utility model discloses can improve the steam parameter, increase the acting capacity of steam, avoid arranging the reheater in the safety problems such as high temperature corrosion that produce in the flue.

Drawings

Fig. 1 and fig. 2 are schematic structural diagrams of a first embodiment of the present invention, wherein fig. 1 is a schematic external structural diagram, and fig. 2 is a schematic diagram of a steam-water flow direction.

Fig. 3 is a schematic view of the flow direction of the steam water according to the second embodiment of the present invention.

In the figure:

1. incinerator, 1.1 fire grate, 1.2 hearth, 1.3 flue, 1.31 vertical flue, 1.311 first vertical flue, 1.312 second vertical flue, 1.313 third vertical flue, 1.32 horizontal flue, 1.33 tail flue, 1.4 feeding hopper,

2. a vertical membrane water wall, 2.1 a first vertical membrane water wall, 2.2 a second vertical membrane water wall, 2.3 a third vertical membrane water wall,

3 superheater, 3.1 first middle-temperature superheater, 3.2 high-temperature superheater, 3.3 second middle-temperature superheater, 3.4 first low-temperature superheater, 3.5 second low-temperature superheater,

4. the coal-saving device is arranged on the coal-saving device channel,

5. the steam pocket is arranged on the upper portion of the steam pocket,

6. a reheater for heating the molten metal to a predetermined temperature,

7 steam path system, 7.1 enter economizer pipeline, 7.2 exit economizer pipeline, 7.31 enter reheater pipeline, 7.32 exit reheater pipeline, 7.41 enter vertical membrane water wall pipeline, 7.42 exit vertical membrane water wall pipeline.

Detailed Description

Fig. 1 and 2 are schematic structural diagrams of a first embodiment of the present invention, wherein fig. 1 is a schematic structural diagram of an external reheat type waste incineration boiler, and fig. 2 is a schematic structural diagram of a steam-water flow direction.

Fig. 1 shows that, in this embodiment, the external reheating type waste incineration boiler includes an incinerator 1 and a waste heat boiler, where the incinerator 1 mainly includes a grate 1.1, a hearth 1.2, and a flue 1.3. The hearth 1.2 is positioned at the upper part of the grate 1.1; according to the flowing direction of the flue gas, the flue 1.31 sequentially comprises a vertical flue 1.31, a horizontal flue 1.32 and a tail flue 1.33, and the vertical flue 1.31 sequentially comprises a first vertical flue 1.311, a second vertical flue 1.312 and a third vertical flue 1.313; the incinerator 1 also comprises a hopper 1.4.

The waste heat boiler consists of a steam drum 5, a reheater 6, three groups of vertical membrane type water-cooled walls 2, a superheater 3 arranged on a horizontal flue 1.32, and an economizer pipe box 4 arranged on a tail flue 1.33,

a steam drum 5 of the waste heat boiler, three groups of vertical membrane type water-cooled walls 2, a horizontal flue and a superheater 3 are fixedly installed by adopting a suspension device,

according to the flowing direction of flue gas, be provided with over heater 3 in horizontal flue 1.32 and include in proper order: the device comprises a first middle-temperature superheater 3.1, a high-temperature superheater 3.2, a second middle-temperature superheater 3.3, a first low-temperature superheater 3.4 and a second low-temperature superheater 3.5.

The reheater 6 is in a dividing wall type structure, saturated steam is arranged in the tube, and reheated steam is arranged outside the tube.

The first medium-temperature superheater 3.1 is arranged in an in-line countercurrent manner, the high-temperature superheater 3.2 is arranged in an in-line concurrent manner, the second medium-temperature superheater 3.3 is arranged in an in-line countercurrent manner, the first low-temperature superheater 3.4 is arranged in an in-line countercurrent manner, and the second low-temperature superheater 3.5 is arranged in an in-line countercurrent manner.

The difference between the present embodiment and the prior art is that the reheater 6 is external to the flue, and the hanger is used to hang the reheater 6 above the flue.

Fig. 2 shows, in this example, the flow direction of the water circuit system 7 as follows: enters the economizer pipe box 4 from the coal inlet economizer pipeline 7.1, exits the economizer from the coal outlet economizer pipeline 7.2 and then enters the steam pocket 5; then the steam is divided into two paths, the first path enters a reheater 6 from a reheater inlet pipeline 7.31, and condensed water after heat exchange returns to the steam drum 5 from a reheater outlet pipeline 7.32; the second enters the water cooled wall from the inlet vertical membrane wall piping 7.41 and then returns to the inlet steam drum from the outlet vertical membrane wall piping 7.42.

In this example, the condensed water after heat exchange in the reheater 6 is returned to the steam drum 5.

Fig. 3 is a schematic view of the flow direction of the steam water according to the second embodiment of the present invention. In the figure, it is shown that, unlike the first embodiment of the present invention, in this embodiment, the condensate after heat exchange in the reheater is not returned to the steam drum 5, but directly enters the water wall 2 for heating.

Claims

1. An external reheating type garbage incineration boiler comprises an incinerator and a waste heat boiler,

2. The external reheating waste incineration boiler of claim 1, wherein the condensate water after the heat exchange of the reheater returns to the steam drum.

3. The external reheating waste incineration boiler of claim 1, wherein the condensate water after heat exchange of the reheater enters the vertical membrane water-cooled wall for heating.