CN202598497U

CN202598497U - Integrally precision-cast wearable air hood for boiler

Info

Publication number: CN202598497U
Application number: CN 201220147593
Authority: CN
Inventors: 陈亮
Original assignee: JIANGSU JINGLONG ALLOY STEEL MACHINERY MANUFACTURING Co Ltd
Current assignee: JIANGSU JINGLONG ALLOY STEEL MACHINERY MANUFACTURING Co Ltd
Priority date: 2012-04-10
Filing date: 2012-04-10
Publication date: 2012-12-12
Anticipated expiration: 2022-04-10

Abstract

The utility model discloses an integrally precision-cast wearable air hood for a boiler. The air hood comprises an air inlet and air outlets. The upper end of the air hood is a regularly octagonal, and the air outlets are uniformly distributed around the upper end of the air hood. The top of the air hood is a circular ball body. The air inlet is formed in the center of the air hood. A thread is arranged at the lower end of the air hood. The slag leakage problem that fine particles enter the inner wall of the air hood along with primary air and seriously abrade a lining of a water supply cold air chamber under the disturbance of the primary air to the slag leakage of the conventional air hood is solved, the service life of the air hood is greatly prolonged, the matched using requirements of a device are met, abrasion to a refractory material and a water-cooled wall in the boiler is avoided, the running cycle of a circulating fluidized bed (CFB) boiler is effectively prolonged, the number of blowing-out times is reduced, running consumption and cost are lowered, positive effects of energy saving and emission reduction are achieved, and the stable fluidization combustion and safe, economic, efficient and stable running of the CFB boiler are ensured.

Description

The wear-resisting blast cap of the whole smart casting of boiler

Technical field:

the utility model relates to the wear-resisting blast cap of the whole smart casting of CFB boiler.

Background technology:

industry CFB Wind cap for boiler such as thermoelectricity, environmental protection at present have various ways, and its shape is that the comparatively of basis see more with the mushroom.Blast cap is one of vitals of CFB boiler, fluidisation whether evenly, can high temperature resistant, the wear-resistant direct efficiency of combustion that influences boiler.For example blast cap scaling loss in service, wearing and tearing are comparatively serious, will cause the often stifled slag of air outlet to cause fluidisation uneven, a large amount of ashes etc. that leak in the air compartment.Even wind cap does not gall more serious leakage slag phenomenon is not arranged yet, blast cap gathers and causes producing blast cap heavy wear leakage lime-ash because of the high velocity air that closes on blast cap purges.Problem like that causes the needs that the CFB boiler operatiopn cycle is short, the cost of overhaul is high, inaccessible system moves.

Summary of the invention:

The purpose of the utility model will provide the whole smart casting of a kind of boiler wear-resisting blast cap exactly, and it can overcome the existing existing above problem of blast cap.The purpose of the utility model is such reality

Existing, the wear-resisting blast cap of the whole smart casting of boiler comprises air outlet, air inlet, it is characterized in that:

Polygon-octagonal is arranged in blast cap upper end, and around it, is uniformly distributed with and is provided with air outlet, and described air outlet diameter is Φ 3mm-Φ 10mm; The circular arc spheroid is arranged on the top of blast cap, and the central authorities of blast cap are provided with air inlet, and the lower end of blast cap is provided with screw thread.The utility model has solved present blast cap and has leaked slag under the disturbance of a wind, and fine particle gets into the blast cap inwall with a wind and reaches the leakage slag problem that causes heavy wear to the water cooled wind chamber liner.Prolonged the service life of blast cap greatly, satisfied the matched with devices instructions for use, guaranteed that interior refractory material of stove and water-cooling wall are not frayed.Effectively prolong the CFB boiler operatiopn cycle, reduced the blowing out number of times, reduced operation and consumed and cost, had the positive role of energy-saving and emission-reduction.Guaranteed that CFB boiler fluidized bed combustion is steady, safety, economic, efficient, stable operation.

The utility model compared with prior art has the following advantages:

1, the air outlet aperture is less, helps cloth wind uniformity, circulation area ratio>=1.5, and operating flexibility is bigger;

2, the air compartment leakage slag that causes after the former blast cap local damage, the potential safety hazard of the impaired operation of boiler have been avoided;

3, the curved spheroid in top has been optimized and slag wearing and tearing outer surface streamline, makes it have the function that reduces wearing and tearing;

4, casting integrated with air inlet, simple and direct, the smoothness that crosses of inner air channel structure is convenient to make processing;

The screw thread that 5, blast cap lower end are provided with directly is connected with air distribution plate, only needs directly to use the spanner dismounting, has solved the loaded down with trivial details operation of blast cap dismounting in the past, greatly reduces the consumption and the replacing time of replacing process material.

Description of drawings:

Fig. 1 is the front view in the utility model structural representation;

Fig. 2 is the upward view in the utility model structural representation;

are the blast cap upper end 1., 2. air outlet, 3. air inlet, 4. screw thread.

The specific embodiment: the utility model is described further below in conjunction with accompanying drawing;

The wear-resisting blast cap of the whole smart casting of boiler comprises air outlet 2, air inlet 3, it is characterized in that:

Polygon-octagonal is arranged in blast cap upper end 1, and around it, is uniformly distributed with and is provided with air outlet 2, and described air outlet 2 diameters are Φ 3mm-Φ 10mm; The circular arc spheroid is arranged on the top of blast cap, and the central authorities of blast cap are provided with air inlet 3, and the lower end of blast cap is provided with screw thread 4.During practical implementation, utilize the high-abrasive material hot investment casting, integrated poured moulding blast cap.The blast cap lower end adopts screw thread to be connected with air distribution plate; The air inlet unthreaded portion adopts boss structure, prevents the screw thread that weares and teares, and dismounting is changed in influence; Air inlet directly is communicated with eight air outlets, and eight air outlets are at same level, same circumference uniform distribution, and described air outlet diameter is Φ 3mm-Φ 10mm, circulation area ratio >=1.5, and operating flexibility is bigger.After effectively having avoided a certain blast cap accidental damage, the disorderly phenomenon of peripheral cloth wind occurs; Circular arc sphere-like profile is adopted on the blast cap top, forms slick and sly streamline with the air outlet perpendicular is tangent, and what effectively reduce that high velocity air blows afloat flies upward the erosive wear of lime-ash to the blast cap body.

Claims

1. the whole essence of boiler is cast wear-resisting blast cap; Comprise air outlet (2), air inlet (3); It is characterized in that: polygon-octagonal is arranged in blast cap upper end (1), and around it, is uniformly distributed with and is provided with air outlet (2), and the circular arc spheroid is arranged on the top of blast cap; The central authorities of blast cap are provided with air inlet (3), and the lower end of blast cap is provided with screw thread (4).

2. the wear-resisting blast cap of the whole smart casting of boiler according to claim 1, it is characterized in that: described air outlet (2) diameter is Φ 3mm-Φ 10mm.