CN211232899U

CN211232899U - Secondary utilization heating system for cooling air of furnace wall of garbage incinerator

Info

Publication number: CN211232899U
Application number: CN201922367504.8U
Authority: CN
Inventors: 郑凯旋; 邢振华; 李则明; 徐广祥; 李纯强; 陈明; 许家玮; 陈莎莎
Original assignee: China State Railway Investment Construction Group Co Ltd
Current assignee: China State Railway Investment Construction Group Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-08-11
Anticipated expiration: 2029-12-25

Abstract

The utility model discloses a secondary utilization heating system for cooling air of a furnace wall of a garbage incinerator, which comprises an air pipe, an air door, a first shunt pipe, a second shunt pipe and a nozzle; the inlet end of the air pipe is communicated with the furnace wall of the incinerator, and the outlet end of the air pipe is communicated with the garbage bin; the air door is arranged at the inlet end of the air pipe; the first shunt pipe is arranged at the outlet end of the air pipe; the first shunt pipe is communicated with a plurality of second shunt pipes; and a plurality of nozzles are arranged on the second shunt pipe. The utility model has the advantages that: the waste heat of the furnace wall cooling air is fully utilized, the hot air is collected and sprayed into the garbage bin through the nozzle, the temperature in the garbage bin in winter is increased, the garbage fermentation efficiency and quality are guaranteed, the garbage bin is heated by reasonably utilizing the waste heat of the waste gas, and the garbage bin has the characteristics of energy conservation and environmental protection.

Description

Secondary utilization heating system for cooling air of furnace wall of garbage incinerator

Technical Field

The utility model relates to a msw incineration heat utilization technical field specifically indicates a msw incineration furnace wall cooling air reutilization heating system.

Background

At present, in the field of waste incineration power generation, a plate heat exchanger is conventionally adopted to heat a waste bin, so that the defects of low heating efficiency and high energy consumption exist, and particularly, the temperature in the waste bin is too low due to low temperature in winter in northern China, so that the waste fermentation efficiency and quality are influenced. The furnace wall of the garbage incinerator is cooled by air, namely, cooling air in the furnace wall is injected from a gap between two layers of refractory bricks through a furnace wall cooling fan, and is guided out of the furnace wall through a furnace wall outlet by a furnace wall cooling induced draft fan, the heat of the furnace wall is taken away by air flow, and the temperature of the furnace wall outlet can reach 90 ℃. In the existing waste incineration method or system, high-temperature airflow at a cooling air outlet of a furnace wall is not recycled.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defect of a system or a device which can recycle the furnace wall cooling air to the garbage bin to heat the garbage in the garbage bin in the prior art, and provides a secondary utilization heating system for the furnace wall cooling air of a garbage incinerator, which comprises an air pipe, an air door, a first shunt pipe, a second shunt pipe and a nozzle;

the inlet end of the air pipe is communicated with the furnace wall of the incinerator, and the outlet end of the air pipe is communicated with the garbage bin; the air door is arranged at the inlet end of the air pipe; the first shunt pipe is arranged at the outlet end of the air pipe; the first shunt pipe is communicated with a plurality of second shunt pipes; and a plurality of nozzles are arranged on the second shunt pipe.

Furthermore, a spiral flow guiding rib is arranged in the nozzle.

Furthermore, a nonmetal compensator is also arranged on the air pipe.

Further, the nozzles are arranged obliquely.

Furthermore, the outer wall of the air pipe is wrapped with a glass silk floss heat-insulating layer.

The utility model has the advantages that: the waste heat of the furnace wall cooling air is fully utilized, the hot air is collected and sprayed into the garbage bin through the nozzle, the temperature in the garbage bin in winter is increased, the garbage fermentation efficiency and quality are guaranteed, the garbage bin is heated by reasonably utilizing the waste heat of the waste gas, and the garbage bin has the characteristics of energy conservation and environmental protection.

Drawings

Fig. 1 is a schematic structural view of the cooling air secondary utilization heating system of the furnace wall of the garbage incinerator.

Fig. 2 is a schematic perspective view of the outlet end of the air duct of fig. 1.

Fig. 3 is a schematic cross-sectional view of any one of the second shunt tubes in fig. 2.

Fig. 4 is a schematic structural diagram of the heating system in fig. 1 after installation.

In the figure, 1, an air duct; 2. a damper; 3. a first shunt pipe; 4. a second shunt pipe; 5. a nozzle; 6. spiral flow guiding ribs; 7. a non-metallic compensator; 8. an incinerator wall; 9. a garbage bin.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

As shown in fig. 1 to 4, a heating system for secondary utilization of cooling air of a furnace wall of a garbage incinerator comprises an air pipe 1, an air door 2, a first shunt pipe 3, a second shunt pipe 4 and a nozzle 5; the inlet end of the air pipe 1 is communicated with the furnace wall 8 of the incinerator, and the outlet end of the air pipe 1 is communicated with the garbage bin 9; the air door 2 is arranged at the inlet end of the air pipe 1, and the air door 2 is used for adjusting the flow of air entering the air pipe 1; the first shunt pipe 3 is arranged at the outlet end of the air pipe 1; the first shunt tubes 3 are communicated with a plurality of second shunt tubes 4, and in the embodiment, the number of the second shunt tubes 4 is 5, and the second shunt tubes 4 are respectively arranged in parallel at intervals; a plurality of nozzles 5 are arranged on the second shunt pipe 4. In this embodiment, each second shunt pipe 4 is provided with 9 nozzles 5, and each nozzle 5 is provided with a spiral flow guiding rib 6. The spiral flow guiding ribs 6 are raised ribs spirally arranged from top to bottom along the inner wall of the nozzle 5; the air entering the nozzle 5 is spirally distributed by the spiral diversion ribs 6, so that the air can be uniformly dispersed in the garbage bin 9, and the distribution surface is wider. In addition, in order to ensure that the nozzle 5 can sufficiently heat the inner wall of the garbage bin 9, the spiral flow guide ribs 6 are not arranged in the nozzle 5 close to the inner wall of the garbage bin 9, and in order to heat the inner wall of the garbage bin 9 more comprehensively, the nozzle 5 can be obliquely arranged, for example, an included angle of 15 degrees exists between the air flow sprayed out from the lower end of the nozzle 5 close to the inner wall of the garbage bin 9 and the vertical inner wall of the garbage bin 9.

In order to compensate the shrinkage and expansion of the air duct 1 during heating and cooling, a nonmetal compensator 7 is also arranged on the air duct 1. In this embodiment, there are two non-metal compensators 7 respectively disposed on the horizontal section and the vertical section of the air duct 1.

In order to reduce the heat loss of the air flow in the air pipe 1, the outer wall of the air pipe 1 is wrapped with a glass silk floss heat-insulating layer. In traditional msw incineration power generation field, the cooling air in the brickwork is directly arranged outward, and through the effect of this system, can let in garbage bin 9 after collecting the brickwork cooling air that is arranged outward originally in, utilize the waste heat of cooling air to realize the heating to garbage bin 9, guaranteed the fermentation efficiency and the quality of the lower interior rubbish of garbage bin 9 of winter temperature. Through the special structural design of first shunt tubes 3, second shunt tubes 4 and nozzle 5, make the air current evenly distributed who gets into garbage bin 9 to can the even rubbish in the heating garbage bin 9, local high temperature phenomenon can not appear, has guaranteed that the even comprehensive of rubbish is heated, and rubbish fermentation efficiency is higher.

Claims

1. The utility model provides a waste incinerator brickwork cooling air reutilization heating system which characterized in that: comprises an air pipe (1), an air door (2), a first shunt pipe (3), a second shunt pipe (4) and a nozzle (5);

the inlet end of the air pipe (1) is communicated with the incinerator furnace wall (8), and the outlet end of the air pipe (1) is communicated with the garbage bin (9); the air door (2) is arranged at the inlet end of the air pipe (1); the first shunt pipe (3) is arranged at the outlet end of the air pipe (1); the first shunt pipe (3) is communicated with a plurality of second shunt pipes (4); and a plurality of nozzles (5) are arranged on the second shunt pipe (4).

2. The waste incinerator furnace wall cooling air reutilization heating system of claim 1, characterized in that: and spiral flow guide ribs (6) are arranged in the nozzle (5).

3. The waste incinerator furnace wall cooling air reutilization heating system of claim 1, characterized in that: and the air pipe (1) is also provided with a nonmetal compensator (7).

4. The waste incinerator furnace wall cooling air reutilization heating system of claim 1, characterized in that: the nozzles (5) are arranged obliquely.

5. The waste incinerator furnace wall cooling air reutilization heating system of claim 1, characterized in that: the outer wall of the air pipe (1) is wrapped with a glass silk floss heat-insulating layer.