CN216667660U

CN216667660U - Coal feeding air structure

Info

Publication number: CN216667660U
Application number: CN202123164184.XU
Authority: CN
Inventors: 周翔
Original assignee: Wuxi Huaguang Environment and Energy Group Co Ltd
Current assignee: Wuxi Huaguang Environment and Energy Group Co Ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-06-03
Anticipated expiration: 2031-12-16

Abstract

The utility model relates to the technical field of circulating fluidized bed boiler coal feeding devices, in particular to a coal feeding air structure which can effectively solve the problem of blockage, ensure normal coal feeding and improve the economical efficiency.

Description

Coal feeding air structure

Technical Field

The utility model relates to the technical field of circulating fluidized bed boiler coal feeding devices, in particular to a coal feeding air structure.

Background

With the increasingly strict national requirements on pollutant emission and the gradually increasing demand of power station boilers and industrial boilers on clean energy technology, the circulating fluidized bed combustion technology has attracted more and more attention as an advanced clean and efficient combustion utilization technology of low-grade fuel, and has been rapidly developed in recent years.

The coal feeding device is an important component part of the material circulation process of the circulating fluidized bed boiler, and mainly has the main function of stably and smoothly conveying fuel to a hearth and maintaining stable combustion of the fuel in the hearth.

Whether the coal feeding device can smoothly convey the fuel into the hearth is a key for determining whether the boiler can stably operate and output power, and is very important for the circulating fluidized bed boiler.

The actual conditions is in the fuel, because the difference in place of production, the difference of weather and the difference of storage mode etc, it changes greatly to cause the moisture content in the fuel, to the great fuel of moisture when getting into coal breakage pipe corner, and easily cause the coal supply pipe jam, consequently can increase a coal supply wind, traditional coal supply wind all sends into through a whole coal supply tuber pipe, to the lower fuel of some humidity, can normally blow away the material that blocks up, but the higher fuel of humidity, become to stick together the jam in the corner easily, coal supply wind can't blow off it, along with continuous feed, the jam department can also be more serious, influence normal coal supply operation.

Disclosure of Invention

In order to solve the problem that the normal coal feeding is affected due to the fact that a bend of an existing coal dropping pipe is prone to being blocked, the utility model provides a coal feeding air structure which can effectively solve the problem of blocking, guarantee normal coal feeding and improve economy.

The technical scheme is as follows: the coal feeding air structure is characterized in that an annular air chamber is installed at the end part of the coal feeding air pipe, an air inlet pipe is installed on the side surface of the annular air chamber, and at least five spray pipes extending into the coal feeding air pipe are installed on the end surface of the annular air chamber.

The device is further characterized in that the spray pipe is a reducing pipe with a diameter reduced at an outlet;

an observation pipe is arranged in the middle of the annular air chamber;

the annular air chamber is connected with the coal supply air pipe through a flange plate;

the spray pipes are uniformly arranged in a ring shape.

After the utility model is adopted, the air inlet pipe is introduced into an external air source, and is blown out from the spray pipes after passing through the annular air chamber, the original whole coal feeding air pipe is changed into a plurality of small spray pipes for air inlet, and the surface blowing is changed into the point blowing, so that the acting force is more concentrated, the lump fuel can be effectively blown away, the problem of blockage is solved, the normal coal feeding is ensured, and the economy is improved; further, the spray tube is the reducing pipe of undergauge for the exit, can improve the air-out velocity of flow in exit, and better fuel that will become to stick together blows off, prevents to block up, and the existence of observing the pipe can conveniently know the intraductal condition, adjusts the amount of wind according to the jam condition, suitable saving cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a coal supply duct.

Detailed Description

Referring to fig. 1 and 2, the coal feeding air structure comprises a coal dropping pipe 1, wherein the coal dropping pipe comprises a vertical section 2 and an inclined section 3, a coal feeding air pipe 4 which is arranged in the same direction as the inclined section 3 is arranged at the joint of the vertical section 2 and the inclined section 3, an annular air chamber 5 is arranged at the end part of the coal feeding air pipe 4, an air inlet pipe 6 is arranged on the side surface of the annular air chamber 5, and at least five annular spray pipes 7 which are uniformly arranged and go deep into the coal feeding air pipe 4 are arranged on the end surface of the annular air chamber 5. In order to prevent the influence on the coal falling, the length of the spray pipe 7 close to the vertical section 2 is shorter, and the length of the spray pipe 7 close to the inclined section 3 is longer, and is as close as possible to the position where the coal is easy to form lumps for blockage.

An observation pipe 8 is arranged in the middle of the annular air chamber 5, so that the blocking condition in the pipe can be observed, when the blocking is serious, the air supply quantity is increased, and when the blocking does not exist basically, the air supply quantity can be reduced, and the cost is reduced to a certain extent.

The annular air chamber 5 is connected with the coal supply air pipe 4 through the flange plate 9, so that the coal supply air pipe 4 is very convenient to overhaul and replace, and the internal inspection and overhaul of the coal dropping pipe 1 are also very convenient after the flange plate 9 is disassembled.

The coal feeding device of the circulating fluidized bed boiler has good structural economic performance, and is convenient to popularize and apply.

Claims

1. The coal feeding air structure is characterized in that an annular air chamber is installed at the end part of the coal feeding air pipe, an air inlet pipe is installed on the side surface of the annular air chamber, and at least five spray pipes extending into the coal feeding air pipe are installed on the end surface of the annular air chamber.

2. The coal feeding air structure as claimed in claim 1, wherein the nozzle is a reducer with a reduced diameter at the outlet.

3. A coal-feeding air structure as claimed in claim 1, wherein an observation tube is installed in the middle of the annular air chamber.

4. The coal feeding air structure as claimed in claim 1, wherein the annular air chamber is connected to the coal feeding duct by a flange plate.

5. A coal-feeding air structure according to claim 1, wherein the nozzles are uniformly arranged in a ring shape.