CN217356866U

CN217356866U - Boiler hood device

Info

Publication number: CN217356866U
Application number: CN202221417700.7U
Authority: CN
Inventors: 周宏�; 陈秀山; 尹文越; 王艳丽; 任延杰; 鲁振兴; 马军; 郭晓红
Original assignee: Xinjiang Qinghua Energy Group Co ltd
Current assignee: Xinjiang Qinghua Energy Group Co ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-09-02
Anticipated expiration: 2032-06-08

Abstract

The utility model relates to the technical field of wind hoods, and discloses a boiler wind hood device, which comprises a wind inlet mechanism, a wind cloth plate for fixing the wind inlet mechanism and a wind hood mechanism for sleeving the wind inlet mechanism, wherein the wind inlet mechanism comprises a wind inlet pipe and a primary air outlet, the wind inlet pipe is connected with the wind cloth plate, the primary air outlet is obliquely arranged on the wind inlet pipe, one end of the wind inlet pipe is provided with a plurality of leaf springs, and the free ends of the leaf springs are provided with adjusting plates; the hood mechanism comprises a hood and a secondary air outlet, the hood is connected with the air distribution plate, the secondary air outlet is obliquely arranged on the hood, a threaded through hole is formed in the top end of the hood, a limiting screw is arranged in the threaded through hole, and the limiting screw is rotatably connected with the adjusting plate. The utility model reduces the wear degree of the hood; the problem of slag leakage of the blast cap is eliminated, the primary air quantity can be maintained at a lower level, the primary fan current is greatly reduced, and the operation economy is remarkably enhanced.

Description

Boiler hood device

Technical Field

The utility model relates to a hood technical field, concretely relates to boiler hood device.

Background

In recent years, circulating fluidized bed boilers are widely applied to power generation, industrial production and centralized heat supply, environmental protection performance, energy-saving effect and stable operation are used for ensuring high parameters of the circulating fluidized bed boilers, air hoods are indispensable parts of the circulating fluidized bed boilers, the fluidized beds are positioned at the bottom of a hearth in the circulating fluidized bed boilers, water cooling air chambers are positioned below furnace fluidized beds, and the air hoods are important components of an air distribution device of the circulating fluidized bed boilers. In the operation process, because the stainless steel plate strips are welded firmly or abraded and cracked frequently due to severe working environment, the fixed air caps are subjected to angle deviation change under the action of primary air, and opposite blowing erosion abrasion among the air caps is caused. When abrasion occurs, local resistance changes of the air distribution plate are usually caused, namely, the resistance of a part of areas is small, the air quantity is large, and the hood is seriously abraded; the resistance of partial area is large, the poor fluidization condition occurs, and the personnel usually adopt the mode of increasing the primary air quantity to operate for maintaining the stable operation of the boiler fluidization, which leads to the increase of the abrasion of the boiler hood.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned defect, the utility model provides a boiler hood device to solve current circulating fluidized bed boiler hood and take place the skew change of angle under the effect of a wind, cause the erosion and wear problem to blowing between the hood.

In order to solve the above problem, the utility model provides a basic scheme does: comprises an air inlet mechanism, an air cloth plate used for fixing the air inlet mechanism and an air cap mechanism used for being sleeved on the air inlet mechanism; the air inlet mechanism comprises an air inlet pipe and a primary air outlet, the air inlet pipe is connected with an air distribution plate, the primary air outlet is obliquely arranged on the air inlet pipe, a plurality of plate springs are arranged at one end of the air inlet pipe, and an adjusting plate is arranged at the free end of each plate spring; the hood mechanism comprises a hood and a secondary air outlet, the hood is connected with the air distributing plate, the secondary air outlet is obliquely arranged on the hood, a threaded through hole is formed in the top end of the hood, a limiting screw is arranged in the threaded through hole, and the limiting screw is rotatably connected with the adjusting plate.

The utility model discloses theory of operation and beneficial effect: the air inlet pipe is welded on the air distribution plate, a plurality of primary air outlet holes are obliquely penetrated through the air inlet pipe, the top end of the air inlet pipe is connected with a plurality of plate springs, and the free ends of the plate springs are welded with the adjusting plate; the air cap is sleeved on the air inlet pipe, the top of the air cap is provided with a threaded through hole, a limiting screw is inserted into the threaded through hole, one end of the limiting screw is rotatably connected with the adjusting plate, an adjusting rod at one end of the limiting screw is fixed, and the limiting screw can be screwed into the threaded through hole by rotating the adjusting rod, so that the tightness degree of the plate spring is adjusted; the blast cap is provided with a plurality of secondary air outlets in a penetrating way, flue gas is discharged from the primary air outlets and is conveyed to the blast cap, and the secondary air outlets on the blast cap diffuse in the gap between the blast cap and the air inlet pipe clamp layer and are movably connected with the blast cap through the top of the air inlet pipe, so that stress concentration can be prevented.

And in the second scheme, the optimization of the basic scheme is realized, and a reinforcing plate is arranged at the other end of the hood and is connected with the wind cloth plate. The other end of the blast cap is welded on the reinforcing plate, so that the reinforcing plate and the blast cap are integrated; the reinforcing plate is connected with the air distribution plate through bolts, so that the air inlet pipe is connected with the air cap, and the relative position of the air inlet pipe and the air cap is fixed.

And in the third scheme, the preferable selection of the second scheme is that the air outlet end of the primary air outlet is inclined upwards. Because the wind direction discharged from the air inlet pipe is vertically upward wind, the air outlet of the air inlet pipe needs to be designed strictly according to the opening rate of a boiler plant and the small hole flow velocity of the air cap, and the flow area, the small hole flow velocity and the air cap resistance of the air cap are not changed in principle; otherwise, poor fluidization, uneven air distribution, bed pressure fluctuation and the like can occur, and even coking can occur in severe cases; the flow area of the air inlet pipe cannot be changed by upwards inclining the air outlet end of the primary air outlet hole by 30 degrees, the flow velocity of the air inlet pipe cannot be reduced, and only the air outlet end upwards inclines by 30 degrees to change the wind direction, so that the blowing loss force of primary air to the air inlet pipe is reduced.

And a fourth scheme is the optimization of the third scheme, and the air outlet end of the secondary air outlet hole is inclined downwards. In order to reduce the abrasion of primary air to the blast cap and the blast pipe, the air outlet end of the primary air outlet hole is upwards inclined by 30 degrees, so that the air outlet end of the secondary air outlet hole is downwards inclined by 30 degrees, the opposite blowing abrasion of the primary air to the blast pipe and the blast cap can be greatly reduced, and the hidden trouble that furnace slag falls over due to unstable air pressure in the boiler when the boiler is started or stopped can also be reduced.

And a fifth scheme is the optimization of the fourth scheme, wherein one end of the blast cap is provided with a handle, and the handle is provided with anti-skid convex lines. Through at hood top welded connection hood, be convenient for operating personnel be convenient for when overhauing the change take out the hood from the air-supply line through the handle, because of the hood upper portion dust is great, can not take out easily, locate anti-skidding burr on hand, operating personnel can place the spiral blade with the breakout tongs and take out the hood on the air-supply line, the operating personnel of being convenient for change the maintenance hood.

Drawings

The invention is further explained below with reference to the drawings and the description.

Fig. 1 is a schematic structural view of the hood device of the boiler of the present invention.

FIG. 2 is a longitudinal section of FIG. 1;

fig. 3 is an enlarged view of a portion a in fig. 2.

In the figure: a wind distribution plate 101; an air inlet pipe 201; a primary air outlet 202; an adjusting plate 203; a plate spring 204; a hood 301; a secondary air outlet 302; a handle 303; a limit screw 304; a reinforcing plate 305; a bolt 306; the helical blade 307; an adjustment lever 308.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1 to 3: a boiler wind cap device comprises a wind inlet mechanism, a wind cloth plate 101 and a wind cap mechanism; the air inlet mechanism comprises an air inlet pipe 201, the air inlet pipe 201 is welded on the air distribution plate 101, a plurality of first-stage air outlet holes 202 are formed in the upper portion of the air inlet pipe 201, the air outlet ends of the first-stage air outlet holes 202 incline upwards by 30 degrees, a plurality of plate springs 204 are arranged at the top of the air inlet pipe 201, and an adjusting plate 203 is welded at one end of each plate spring 204; the hood mechanism includes hood 301, the welding of hood 301 bottom has gusset plate 305, gusset plate 305 and wind panel 101 bolted connection, hood 301 lower part is equipped with a plurality of second grade exhaust vents 302, the air-out end downward sloping of second grade exhaust vents 302 is 30, hood 301 top is equipped with the screw thread through-hole, screw thread through-hole threaded connection has stop screw 304, stop screw 304 welds and has adjusts pole 308, stop screw 304 precession screw thread through-hole in, stop screw 304 rotates with regulating plate 203 to be connected, stop screw 304 one end rigid coupling has adjusts pole 308, the welding of hood 301 top has handle 303, the welding has anti-skidding burr 307 on the handle 303.

The implementation manner of the embodiment is as follows: firstly, welding an air inlet pipe 201 on an air distribution plate 101, enabling a plate spring 204 to abut against the outer wall of the top of the air inlet pipe 201, and welding the plate spring 204 and an adjusting plate 203 to enable the adjusting plate 203 to be rotatably connected with a limiting screw 304; a limit screw 304 penetrates into a threaded through hole in the top of the blast cap 301, an adjusting rod 308 is fixedly connected with one end of the limit screw 304, the blast cap 301 is sleeved with the air inlet pipe 201, a reinforcing plate 305 is welded at the bottom end of the blast cap 301, the blast cap 301 is connected with the air distribution plate 101 through a bolt 306, the bottom air distribution plate 101 is fixed, and the blast cap 301 is sleeved outside the air inlet pipe 201; the limiting screw 304 is rotated by rotating the adjusting rod 308, and the nut 308 is screwed in a clockwise rotation manner, so that the adjusting plate 203 presses the plate spring 204, and the plate spring is propped against the air inlet pipe 201 at the top part relative to the blast cap 301, and the air inlet pipe 201 is prevented from moving upwards under the action of wind force; the plate spring 204 is in a relaxed state by reversing the tightening of the nut 308 to position the limit screw 304 relative to the adjustment plate 203; the relative position of the air inlet pipe 201 and the top of the blast cap 301 is controlled by adjusting the limit screw 304.

By arranging the primary air outlet 202 on the air inlet pipe 201 at the upper part, the air outlet end of the primary air outlet 202 is inclined upwards by 30 degrees; the secondary air outlet holes 302 on the blast cap 301 are arranged at the lower part, the air outlet ends of the secondary air outlet holes 302 are inclined downwards by 30 degrees, the opposite blowing capacity of primary air of the air inlet pipe 201 and the blast cap 301 can be reduced, the resistance of the blast cap 301 is reduced, the possibility of slag leakage of the blast cap 301 is reduced, the relative distance between the blast cap 301 and the air inlet pipe 201 is stabilized, and the possibility of slag leakage of the blast cap 301 is further reduced; the lower ends of the air inlet pipe 201 and the blast cap 301 are fixed on the air distribution plate 101 in a flange mode, and meanwhile the air inlet pipe 201 and the upper portion of the blast cap 301 are fixed through the limiting screw 304, the adjusting plate 203 and the plate spring 204, so that the concentrated stress of the air inlet pipe 201 and the blast cap 301 is reduced; the utility model greatly reduces the abrasion degree of the hood 301; the slag leakage problem of the blast cap 301 is eliminated, the primary air quantity can be maintained at a lower level, the primary fan current is greatly reduced, and the operation economy is remarkably enhanced.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top", "end", "one side" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Also, unless expressly stated or limited otherwise, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and thus, for example, "connected" may be fixedly, detachably, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It is to be understood that the above description is only one embodiment of the invention, and not all embodiments. Other modifications or equivalent substitutions made by those skilled in the art based on the embodiments of the present invention should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A boiler hood device is characterized in that: comprises an air inlet mechanism, an air cloth plate used for fixing the air inlet mechanism and an air cap mechanism used for being sleeved on the air inlet mechanism; the air inlet mechanism comprises an air inlet pipe and a primary air outlet, the air inlet pipe is connected with an air distributing plate, the primary air outlet is obliquely arranged on the air inlet pipe, a plurality of plate springs are arranged at one end of the air inlet pipe, and an adjusting plate is arranged at the free end of each plate spring; the hood mechanism comprises a hood and a secondary air outlet, the hood is connected with the air distributing plate, the secondary air outlet is obliquely arranged on the hood, a threaded through hole is formed in the top end of the hood, a limiting screw is arranged in the threaded through hole, and the limiting screw is rotatably connected with the adjusting plate.

2. The boiler hood device according to claim 1, wherein: the bottom end of the blast cap is provided with a reinforcing plate, and the reinforcing plate is connected with the wind cloth plate.

3. A boiler hood device according to claim 2, characterized in that: and the air outlet end of the primary air outlet hole is inclined upwards.

4. A boiler hood device according to claim 3, characterized in that: and the air outlet end of the secondary air outlet hole is inclined downwards.

5. The boiler hood device according to claim 4, wherein: one end of the blast cap is provided with a handle, and the handle is provided with anti-skid convex lines.