CN218645557U

CN218645557U - Material fluidizing system for inlet flue of cyclone separator

Info

Publication number: CN218645557U
Application number: CN202222800526.0U
Authority: CN
Inventors: 张超; 孙伟; 徐晓; 王万波; 才帅; 李在洲; 陈聪; 关文器
Original assignee: North Huajin Chemical Industries Co Ltd
Current assignee: North Huajin Chemical Industries Co Ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-03-17
Anticipated expiration: 2032-10-24

Abstract

The utility model relates to a circulating fluidized bed boiler technical field specifically discloses a be used for cyclone to enter mouth flue material fluidization system. The material fluidization system comprises a fluidization wind main valve, a fluidization wind main pipeline, a fluidization wind branch valve, a fluidization wind hose and a fluidization wind cap. The material fluidization system can greatly reduce the cooling time of the boiler after application, reduce the power consumption of a fan, reduce the using amount of ammonia water, reduce the flow velocity of flue gas, improve the heat efficiency of the boiler, reduce manpower during ash removal, reduce the length of ash removal time and reduce the safety risk during ash removal.

Description

Be used for cyclone inlet flue material fluidization system

Technical Field

The utility model relates to a circulating fluidized bed boiler technical field specifically discloses a be used for cyclone to enter mouth flue material fluidization system.

Background

The circulating fluidized bed boiler adopts the clean coal combustion technology with the highest industrialization degree, but the ash accumulation of a horizontal flue of a cyclone separator in the operation of the circulating fluidized bed boiler is a more serious problem: due to the inherent characteristics of the circulating fluidized bed boiler, the flue gas carries a large amount of material particles to carry out strong disturbance, combustion and heat exchange, and the ash concentration in the flue gas is higher; when the load of the boiler is reduced, the flow rate of the flue gas is reduced, and the flow velocity of the flue gas is reduced, so that a large amount of ash particles are deposited in the horizontal flue, and the flow area of the horizontal flue is directly reduced due to the gradual rise of the ash level; when the load of the boiler rises again, the flow velocity of the flue gas is increased, and the resistance of the flue gas system is increased along with the reduction of the flow area at the horizontal flue.

The increased resistance of the wind and smoke system causes the following problems: firstly, the resistance is increased, so that the output of the induced draft fan is increased, and further the plant power consumption rate is increased; secondly, along with the increase of the flow velocity of flue gas, the abrasion at the horizontal flue is increased, so that the castable is easy to fall off, especially the abrasion at the tangential part of the cyclone separator is more serious, and the operation period of the boiler is greatly reduced; thirdly, the flow field of the raw flue gas entering the cyclone separator is changed, so that the efficiency of the cyclone separator is reduced, the heat transfer of a heating surface is influenced, and the efficiency of a boiler is influenced; finally, because the horizontal flue of the cyclone separator is accumulated with dust, the cooling time of the boiler is prolonged, the power consumption of the fan is greatly increased, a large amount of manpower and material resources are needed to be spent during cleaning, and the maintenance time is prolonged.

SUMMERY OF THE UTILITY MODEL

The utility model has the conception that: a material fluidization system of an inlet flue of the cyclone separator is added, primary hot air is used for fluidizing dust accumulated in the inlet flue of the cyclone separator through a pigtail-shaped pipe hood, and then the dust enters the cyclone separator.

The utility model provides a material fluidization system for a cyclone separator inlet flue, which comprises a fluidization wind main valve 4, a fluidization wind main pipeline 5, a fluidization wind branch pipeline 6, a fluidization wind branch valve 7, a fluidization wind hose 8 and a fluidization wind cap 9; the fluidized air main valve 4 is connected with an air source mechanism through a pipeline a; the tail end of the main pipeline 5 of the fluidized wind is divided into branch pipelines 6 after the main pipeline 5 of the fluidized wind is connected to the main valve 4 of the fluidized wind; the fluidized wind branch pipeline 6 is connected to a fluidized wind branch valve 7; a blowing wind branch collecting pipe b is connected behind the fluidized wind branch valve 7, and fluidized wind hoses 8 are symmetrically arranged on the blowing wind branch collecting pipe b; the tail end of the fluidized air hose 8 is provided with a fluidized air cap 9, and the fluidized air cap 9 is perpendicular to the fluidized air hose 8 and is parallel to an inlet flue of the cyclone separator.

Preferably, the fluidization hood 9 is a pigtail-shaped duct hood.

Preferably, the fluidized air hoses 8 are symmetrically arranged on the blowing air branch collecting pipes b in a staggered manner of long and short.

Preferably, the tail end of the main pipeline 5 of the fluidized wind is divided into 2 branch pipelines 6 of the fluidized wind, and the branch pipelines are respectively connected with a fluidized wind branch valve 7.

Further, each of the branch blowing wind collecting pipes b is provided with 12 branch fluidizing wind hoses 8.

Further, the material fluidization system comprises 24 fluidization air caps.

Preferably, the fluidizing wind main pipeline 5 is a DN219 white steel pipeline.

Preferably, the fluidized wind branch pipeline 6 is a DN108 white steel pipeline.

Preferably, the air source mechanism comprises a primary air fan 1 and an outlet air duct 3.

Further, an air preheater 2 is arranged in the middle of the outlet air duct 3.

The utility model discloses the beneficial effect who gains: the utility model discloses a material fluidization system of cyclone entry flue can greatly reduced boiler cooling time after using, reduces the fan power consumption, reduces the aqueous ammonia use amount, reduces the flue gas velocity of flow, improves boiler thermal efficiency, manpower when reducing the deashing simultaneously, when reducing the deashing long, when reducing the deashing safe risk.

Drawings

Fig. 1 is a schematic diagram of the system structure of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail with reference to the following embodiments. It should be noted that the present invention is not limited to the following examples.

Example 1

As shown in fig. 1, the material fluidization system for the inlet flue of the cyclone separator comprises a fluidization wind main valve 4, a fluidization wind main pipeline 5, a fluidization wind branch pipeline 6, a fluidization wind branch valve 7, a fluidization wind hose 8 and a fluidization wind cap 9; the fluidized air main valve 4 is connected with an inlet flue 3 of the cyclone separator through a pipeline a; the fluidized wind main pipeline 5 is connected to the fluidized wind main valve 4, and the fluidized wind main pipeline 5 is a DN219 white steel pipeline; 2 branch fluidizing wind branch pipelines 6 are branched from the tail end of the fluidizing wind main pipeline 5, and the fluidizing wind branch pipelines 6 are DN108 white steel pipelines; the fluidized wind branch pipeline 6 is connected to a fluidized wind branch valve 7; the rear part of the fluidized air branch valve 7 is connected with a blowing air branch collecting pipe b, and each blowing air branch collecting pipe b is symmetrically provided with 12 branch fluidized air hoses 8 in a long-short staggered mode; the tail end of each fluidization air hose 8 is provided with a fluidization air cap 9, the fluidization air cap 9 is perpendicular to the fluidization air hose 8 and parallel to an inlet flue of the cyclone separator, the fluidization air cap 9 is a pigtail-shaped air cap, and the material fluidization system comprises 24 fluidization air caps.

The middle of the outlet air duct 3 is provided with a primary air preheater 2 connected with a primary air preheater 2, and a primary fan 1 is connected in front of the primary air preheater 2.

After a material fluidization system of a cyclone separator inlet flue is added, the following effects are achieved: rotary boltThe flow area of a horizontal flue at the inlet of the air separator is greatly improved, the resistance of an air-smoke system is reduced, the current of an induced draft fan is reduced by 4A, and the power consumption of a plant is reduced; the separation efficiency of the separator is increased, the material returning amount of the material returning device is increased, the bed temperature is reduced by 4 ℃, and NO is reduced _X The generation amount is reduced, and the using amount of ammonia water is reduced; after the measurement and calculation, the flow velocity of the flue gas is reduced by 2m/s after a material fluidizing system is additionally arranged at the inlet of the cyclone separator, the abrasion of the tangential part of the inlet of the cyclone separator is reduced, the falling castable is prevented from falling to a feed back leg, and the possibility of unplanned furnace shutdown is reduced; the heat exchange efficiency of the heating surface is increased, the coal consumption is indirectly reduced, and the operating economy of the boiler is improved; the cooling time of the boiler is reduced by 8 hours, and the power consumption of auxiliary machines is reduced; reduce the manpower and material resources that the horizontal flue deashing needs, reduce the safety risk when deashing personnel's operation simultaneously.

Claims

1. A material fluidization system for an inlet flue of a cyclone separator is characterized by comprising an air source mechanism, a fluidization air main valve (4), a fluidization air main pipeline (5), a fluidization air branch pipeline (6), a fluidization air branch valve (7), a fluidization air hose (8) and a fluidization air cap (9); the fluidized air main valve (4) is connected with an air source mechanism through a pipeline (a); the tail end of the main pipeline (5) of the fluidized wind is divided into branch pipelines (6) of the fluidized wind after the main pipeline (5) of the fluidized wind is connected to the main valve (4) of the fluidized wind; the fluidized wind branch pipeline (6) is connected to a fluidized wind branch valve (7); a blowing wind branch collecting pipe b is connected behind the fluidized wind branch valve (7), and fluidized wind hoses (8) are symmetrically arranged on the blowing wind branch collecting pipe (b); the tail end of the fluidization wind hose (8) is provided with a fluidization wind cap (9), and the fluidization wind cap (9) is perpendicular to the fluidization wind hose (8) and parallel to an inlet flue of the cyclone separator.

2. The system for cyclone inlet flue material fluidization according to claim 1, wherein the fluidization hood (9) is a pigtail-shaped hood.

3. The system for fluidizing cyclone inlet flue material according to claim 1, wherein said fluidizing air hoses (8) are symmetrically arranged in a "long-short" staggered manner on the purge air branch headers (b).

4. The fluidizing system for inlet flue material of cyclone separator according to claim 1, wherein the fluidizing wind main line (5) is divided into 2 branches of fluidizing wind branch line (6) at the end, and the fluidizing wind branch line (6) is connected with a fluidizing wind branch valve (7) at the rear.

5. System for cyclone inlet flue material fluidization according to claim 1, characterized in that each of the purge wind branch headers (b) is provided with 12 sub-fluidization wind hoses (8), respectively.

6. The system for cyclone inlet flue material fluidization according to claim 5, characterized in that it has 24 fluidization hoods (9) in total.

7. The system for fluidizing cyclone inlet flue material of claim 1, wherein said fluidizing wind main (5) is DN219 white steel line.

8. The system for fluidizing cyclone inlet flue material of claim 1, wherein said fluidizing air branch line (6) is a DN108 white steel line.

9. The system for fluidizing cyclone inlet flue material of claim 1 wherein said air supply means comprises a primary air fan (1) and an outlet duct (3).

10. System for fluidizing cyclone inlet flue material according to claim 9, characterized in that an air preheater (2) is provided in the middle of the outlet duct (3).