CN210107379U

CN210107379U - Air distribution plate hood of circulating fluidized bed boiler

Info

Publication number: CN210107379U
Application number: CN201920630266.2U
Authority: CN
Inventors: 梁付彬
Original assignee: Jiulong Paper Industry (tianjin) Co Ltd
Current assignee: Jiulong Paper Industry (tianjin) Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-02-21
Anticipated expiration: 2029-04-30

Abstract

The utility model discloses a circulating fluidized bed boiler grid plate hood, including the tuber pipe, the equal level in both sides of tuber pipe is provided with the grid plate, and the surface of tuber pipe is close to grid plate's top position department and is provided with the installation piece, slidable mounting is cup jointed to the upper end of tuber pipe has the hood, the ventilation hole has evenly been seted up to the lower extreme side of hood, and the lower extreme embedding slidable mounting of hood in the upper surface of installation piece. The utility model relates to a cloth blast cap technical field, this circulating fluidized bed boiler cloth blast cap, it is an alloy steel material component to pass through the blast cap, alloy steel contains tungsten, molybdenum metal element, the upper end wall thickness of blast cap is 20 millimeters, and the lateral wall thickness of blast cap is 13 millimeters, the internal diameter of blast cap is 52 millimeters, can optimize blast cap metal material, thereby increase the wearability of blast cap head, simultaneously through the effective use thickness who increases the blast cap, not only can improve the work efficiency of boiler, but also prolonged the life of blast cap.

Description

Air distribution plate hood of circulating fluidized bed boiler

Technical Field

The utility model relates to a grid plate hood technical field specifically is a circulating fluidized bed boiler grid plate hood.

Background

The circulating fluidized bed boiler utilizes a circulating fluidized bed combustion technology, has the advantages of high efficiency, cleanness, low pollution, wide fuel use, high ash utilization rate and the like, and is widely applied to the fields of power station boilers and waste incineration.

However, under the working conditions of high temperature, high material concentration, large particles and high flow rate of the conventional circulating fluidized bed boiler, the abrasion of the hood head of the hood is inevitable and cannot be avoided, so that the conditions of wearing the hood head, enlarging holes, falling off the hood head and the like can be caused, the primary air volume is large, the proportion of secondary air participating in combustion is reduced, the total production amount of nitrogen oxides is increased, the total air volume in operation is increased, the oxygen volume is increased, the boundary of an actual dense area is higher than the design elevation, the abrasion of the whole boiler is aggravated, and particularly, the abrasion is serious at a flame shielding angle and a part 3 m high; the cap head is worn through, holes are enlarged, the slag leakage amount of an air chamber is increased, uneven air distribution can be caused in severe cases, fluidization of a bed surface is affected, a combustion gas field in a hearth is changed, local abrasion and side abrasion of a water wall pipe are increased, the cap head falls off and worn through to cause a local empty bed, high wind speed aggravates abrasion of a heating surface, the damage is larger than that of hole enlargement (unplanned shutdown can be caused in severe cases of slag leakage amount of the air chamber), the air cap is made of high alloy steel, the service cycle is short, frequent replacement is not economical, the air cap is installed on an air distribution plate in a furnace, replacement time is long, the number of accessories is large, replacement construction cost is high, and meanwhile, the effective operation rate of the boiler is restricted.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a circulating fluidized bed boiler grid plate hood has solved present circulating fluidized bed boiler at high temperature, high material concentration, large granule, under the operating mode of high velocity of flow, the wearing and tearing of hood cap head can not be avoided, does not solve, will lead to the problem of the condition such as cap head wearing, punchhole expansion, cap head drop.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a circulating fluidized bed boiler air distribution plate hood comprises an air pipe, air distribution plates are horizontally arranged on two sides of the air pipe, an installation block is arranged at a position, close to the upper position of the air distribution plates, of the outer surface of the air pipe, an air hood is sleeved and slidably installed at the upper end of the air pipe, ventilation holes are uniformly formed in the side face of the lower end of the air hood, the lower end of the air hood is embedded into the upper surface of the installation block in a sliding mode, air distribution holes are formed in the outer surface of the upper end of the air pipe, a screw rod penetrates through the middle position of the upper surface of the air hood in a sliding mode and is slidably installed, the lower end of the screw rod is fixedly connected with the upper surface of the air pipe, a fixed block is sleeved and slidably installed at a position, close to the two sides of the screw rod, of the outer surface of the fixed block, auxiliary fixed rods penetrate through the positions of the two sides of, and a nut is sleeved on the outer surface of the upper end of the screw rod.

Preferably, the blast cap is a component made of alloy steel, and the alloy steel contains tungsten and molybdenum metal elements.

Preferably, the wall thickness of the upper end of the blast cap is 20 mm, the wall thickness of the side wall of the blast cap is 13 mm, and the inner diameter of the blast cap is 52 mm.

Preferably, the air distribution holes are uniformly distributed in a staggered manner, the diameter of each air distribution hole is set to be 5 +/-0, 1 millimeter, the air distribution holes are arranged into four layers, and the interval between every two layers is 10 millimeters.

Preferably, the upper surface of the mounting block is provided with a slot matched with the lower end of the hood, and a fixing bolt is embedded in the surface of one side of the mounting block.

Preferably, the both sides surface of fixed block all imbeds slidable mounting and has the axle of inserting, the one end fixedly connected with handle of axle of inserting, the equal horizontally connected with spring of both sides position department that a side surface of handle is close to the axle of inserting, the one end of spring and a side fixed connection of fixed block, the jack corresponding with the axle of inserting is seted up to a side of supplementary dead lever.

Advantageous effects

The utility model provides a circulating fluidized bed boiler grid plate hood, compare with prior art and possess following beneficial effect:

(1) this circulating fluidized bed boiler grid plate hood, cup joint slidable mounting through the upper end of tuber pipe has the hood, the hood is an alloy steel material component, alloy steel contains tungsten, molybdenum metal element, the upper end wall thickness of hood is 20 millimeters, and the lateral wall thickness of hood is 13 millimeters, the internal diameter of hood is 52 millimeters, can optimize hood metal material, thereby increase the wearability of hood cap head, simultaneously through the effective use thickness who increases the hood, not only can improve the work efficiency of boiler, and the life of hood has still been prolonged.

(2) This circulating fluidized bed boiler grid plate hood has evenly seted up the ventilation hole through the lower extreme side of hood, and the grid hole is the staggered equipartition, and the diameter in grid hole sets up to 5 +/-0, 1 millimeter, and the grid hole sets up to the four layers, and every interlamellar interval is 10 millimeters, effectively solves because of the hood head grinds, drops the big amount of wind blowout that causes, solves the difficult problem that the sediment was leaked in the cloth wind.

(3) This circulating fluidized bed boiler grid plate hood, the last fixed surface who passes through the lower extreme of screw rod and tuber pipe is connected, the top position department that the surface of screw rod is located the hood cup joints and slides and is provided with the fixed block, the both sides position department that the upper surface of fixed block is close to the screw rod all runs through slidable mounting and has supplementary dead lever, the lower extreme of supplementary dead lever runs through slidable mounting in the upper surface of hood and with the last fixed surface of tuber pipe be connected, the upper end surface of screw rod cup joints and is provided with the nut, can improve the installation fastness of hood, prevent at the in-process of work, the hood takes place the pine and takes off the phenomenon.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a schematic view of the hood structure of the present invention;

fig. 3 is a partial enlarged view of the structure a in fig. 1 according to the present invention.

In the figure: 1 tuber pipe, 2 air distribution plate, 3 installation pieces, 31 slots, 32 fixing bolt, 4 blast caps, 5 ventilation holes, 6 air distribution holes, 7 screw rods, 8 fixed blocks, 81 inserted shafts, 82 handles, 83 springs, 9 auxiliary fixing rods, 10 nuts.

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.

Referring to fig. 1-3, the present invention provides a technical solution: a circulating fluidized bed boiler air distribution plate hood comprises an air pipe 1, air distribution plates 2 are horizontally arranged on two sides of the air pipe 1, an installation block 3 is arranged at a position, close to the upper portion of the air distribution plates 2, of the outer surface of the air pipe 1, an air cap 4 is sleeved and slidably installed at the upper end of the air pipe 1, the air cap 4 is an alloy steel component, the alloy steel contains tungsten and molybdenum metal elements, in order to improve the wear resistance of the hood head of the air cap 4, the wall thickness of the upper end of the air cap 4 is 20 millimeters, the wall thickness of the side wall of the air cap 4 is 13 millimeters, the inner diameter of the air cap 4 is 52 millimeters, in order to prolong the service life of the air cap 4, ventilation holes 5 are uniformly formed in the side face of the lower end of the air cap 4, the lower end of the air cap 4 is embedded and slidably installed on the upper surface of the installation block 3, air distribution holes 6 are formed in the outer surface of the upper end of the air pipe 1, a screw 7 is slidably, the outer surface of the screw 7 is positioned above the hood 4 and is sleeved with a fixed block 8 in a sliding manner, the positions of the upper surface of the fixed block 8, which are close to the two sides of the screw 7, are provided with auxiliary fixed rods 9 in a penetrating manner, the lower ends of the auxiliary fixed rods 9 are arranged on the upper surface of the hood 4 in a penetrating manner and are fixedly connected with the upper surface of the air pipe 1 in a penetrating manner, the outer surface of the upper end of the screw 7 is sleeved with a nut 10, the upper surface of the mounting block 3 is provided with a slot 31 matched with the lower end of the hood 4, one side surface of the mounting block 3 is embedded with a fixed bolt 32, the two side surfaces of the fixed block 8 are embedded with an inserting shaft 81 in a sliding manner, one end of the inserting shaft 81 is fixedly connected with a handle 82, the positions of one side surface of the handle 82, which are close to the two sides of the inserting shaft 81, are, in order to improve the connection firmness of the hood 4, the phenomenon that the hood 4 is loosened is prevented.

When in use, because the wear-resisting strength of tungsten and molybdenum is higher, the wear resistance of the head of the blast cap 4 can be improved by adding elements of tungsten and molybdenum into the blast cap 4, the strength of the blast cap 4 can be improved by increasing the thickness of the head of the blast cap 4, thereby prolonging the service life of the blast cap 4, under the condition of not influencing the total ventilation volume, the air distribution holes 6 are changed into an integral porous hole form, so that air can be uniformly dispersed from the air distribution holes 6, the problems of large air volume ejection and air distribution slag leakage caused by abrasion and falling off of the head of the blast cap 4 are effectively solved, when the blast cap 4 is installed, the blast cap 4 is sleeved on the blast pipe 1, the lower end of the blast cap 4 is inserted into the slot 31 on the installation block 3, then the fixing bolt 32 is fixed, then the handle 82 on the insertion shaft 81 is pulled, the handle 82 drives the insertion shaft 81 to move, and then the screw 7 and the auxiliary fixing block 9 are sleeved with the handle 8, the air cap 4 is fixed on the air duct 1 by moving the air cap downward, loosening the handle 82, inserting the inserting shaft 81 into the inserting hole by the spring 83 under the elasticity of the spring 83 when the inserting shaft 81 moves to the inserting hole position on the auxiliary fixing rod 9, fixing the fixing block 8 and the auxiliary fixing rod 9 together, sleeving the nut 10 on the screw rod 7, and further fixing the fixing block 8.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a circulating fluidized bed boiler grid plate hood, includes tuber pipe (1), its characterized in that: the air distribution plate (2) is horizontally arranged on two sides of the air pipe (1), the mounting block (3) is arranged at the position, close to the air distribution plate (2), of the outer surface of the air pipe (1), the air cap (4) is sleeved and slidably mounted at the upper end of the air pipe (1), the air vent (5) is uniformly formed in the side face of the lower end of the air cap (4), the lower end of the air cap (4) is embedded into the upper surface of the mounting block (3) in a sliding manner, the air distribution hole (6) is formed in the outer surface of the upper end of the air pipe (1), the screw rod (7) is slidably mounted at the middle position of the upper surface of the air cap (4) in a penetrating manner, the lower end of the screw rod (7) is fixedly connected with the upper surface of the air pipe (1), the fixing block (8) is slidably mounted at the position, close to the position of the upper end of the air cap (4), the fixing block (8) is slidably mounted at the position, the lower end of the auxiliary fixing rod (9) penetrates through the upper surface of the blast cap (4) in a sliding mode and is fixedly connected with the upper surface of the blast pipe (1), and the outer surface of the upper end of the screw rod (7) is provided with a nut (10) in a sleeved mode.

2. The air distribution plate hood of the circulating fluidized bed boiler of claim 1, wherein: the blast cap (4) is an alloy steel component, and the alloy steel contains tungsten and molybdenum metal elements.

3. The air distribution plate hood of the circulating fluidized bed boiler of claim 1, wherein: the upper end wall thickness of hood (4) is 20 millimeters, and the lateral wall thickness of hood (4) is 13 millimeters, the internal diameter of hood (4) is 52 millimeters.

4. The air distribution plate hood of the circulating fluidized bed boiler of claim 1, wherein: the air distribution holes (6) are uniformly distributed in a staggered manner, the diameters of the air distribution holes (6) are set to be 5 +/-0 and 1 millimeter, the air distribution holes (6) are arranged into four layers, and the interval between every two layers is 10 millimeters.

5. The air distribution plate hood of the circulating fluidized bed boiler of claim 1, wherein: the upper surface of the mounting block (3) is provided with a slot (31) matched with the lower end of the hood (4), and a fixing bolt (32) is embedded in the surface of one side of the mounting block (3).

6. The air distribution plate hood of the circulating fluidized bed boiler of claim 1, wherein: the both sides surface of fixed block (8) all imbeds slidable mounting and has inserts axle (81), the one end fixedly connected with handle (82) of inserting axle (81), the equal horizontally connected with spring (83) of both sides position department that a side surface of handle (82) is close to and inserts axle (81), the one end of spring (83) and a side fixed connection of fixed block (8), the jack corresponding with inserting axle (81) is seted up to a side of supplementary dead lever (9).