CN217540719U

CN217540719U - Air distribution waste discharge structure for burning solid waste

Info

Publication number: CN217540719U
Application number: CN202220594445.7U
Authority: CN
Inventors: 陆晓焰; 秦卫东; 段国生; 章维明
Original assignee: Wuxi Huaguang Environment and Energy Group Co Ltd
Current assignee: Wuxi Huaguang Environment and Energy Group Co Ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-10-04
Anticipated expiration: 2032-03-18

Abstract

The utility model relates to a circulating fluidized bed technical field specifically is a burning cloth wind exhaust structure of solid wastes material, can let foreign matter such as iron nail, iron wire discharge smoothly, guarantees boiler fluidization effect, reduces blowing-out number of times, extension boiler continuous operation time, and it includes the cloth wind board, seted up row cinder notch and installed the hood on the cloth wind board, a serial communication port, the hood head of hood is the button head structure just the overhead air outlet height of hood is 22-23mm, the diameter is 10-10.5mm, the height of hood is 124-125mm, horizontal pitch between the hood is 170-175mm, the degree of depth and the furnace degree of depth ratio of cloth wind board are 35-40%.

Description

Air distribution waste discharge structure for burning solid waste

Technical Field

The utility model relates to a circulating fluidized bed technical field specifically is a cloth wind exhaust structure of burning solid waste.

Background

The circulating fluidized bed boiler can treat common industrial combustible solid wastes, mainly papermaking waste residues, papermaking sludge, cloth strips, leather and the like, china has a large number of papermaking enterprises, and a large number of papermaking waste residues are generated every year, but the papermaking waste residues are the most difficult to treat, because iron nails, iron wires and other heavy non-combustible foreign matters exist in the papermaking waste residues, although a pretreatment system is provided with a plurality of iron removing devices, the iron nails, the iron wires and other foreign matters still cannot be completely removed, because the iron wires and the iron nails have large density difference compared with bed materials and are generally deposited on a grid plate castable, the grid plate structure and the operation mode of the conventional coal-fired fluidized bed boiler cannot discharge the iron nails and the iron wires, if the boiler treats 350 tons of the wastes every day according to the content of 0.5 percent of the iron nails and the iron wires in the papermaking waste, 1.75 tons of the iron nails and the iron wires enter a hearth every day, and if the wastes cannot be removed in time, 17.5 tons of the iron nails and the iron wires are deposited on the grid plate to affect the boiler, the fluidization of the boiler cannot continue to operate, and only the boiler can be manually cleaned in the hearth every ten days.

SUMMERY OF THE UTILITY MODEL

In order to solve the current foreign matter such as iron nail, iron wire pile up easily on the grid plate, influence the boiler fluidization, the problem of the artifical clearance of frequent blowing out, the utility model provides a burning is useless structure of wasting discharge of cloth wind of solid waste, it can let foreign matters such as iron nail, iron wire discharge smoothly, guarantees boiler fluidization effect, reduces the number of times of blowing out, extension boiler continuous operation time.

The technical scheme is as follows: the utility model provides a solid waste's of burning cloth wind exhaust structure, its includes the grid plate, seted up the cinder notch and installed the hood on the grid plate, its characterized in that, the hood head of hood is the button head structure and the overhead air outlet height of hood is 22-23mm, the diameter is 10-10.5mm, the height of hood is 124-125mm, the horizontal pitch between the hood is 170-175mm, the degree of depth and the furnace degree of depth ratio of grid plate are 35-40%.

The slag discharging device is further characterized in that the number of the slag discharging pipes is four, and the diameter of the slag discharging pipes is 240-250mm;

and the slag falling pipe connected with the slag discharging port is provided with an air cannon.

After the utility model is adopted, smooth round-head hood heads are respectively adopted on the hood structure and arrangement, the height of the hood is reduced, the transverse pitch of the hood is increased, the flowing of iron nails, iron wires and the like to the slag falling port between the hoods is facilitated, the proportion of the air distribution plate is reduced, the height of the small holes of the hood is reduced, the air speed of the small holes of the hood is improved, heavy incombustibles deposited on the air distribution plate can be blown, the heavy incombustibles can move to the slag discharging port under the material wrapping and clamping, an air cannon is additionally arranged on the slag falling pipe, the blockage at the slag falling port can be broken, the slag can be discharged smoothly, and finally, foreign matters such as the iron nails and the iron wires can be discharged smoothly, the fluidization effect of the boiler is ensured, the frequent stopping of the boiler for cleaning is not needed, and the continuous operation time of the boiler is prolonged; furthermore, the number of the slag falling pipes is properly increased and the diameter of the slag falling pipes is properly increased, so that foreign matters such as iron nails and iron wires are close to corresponding slag holes and are convenient for discharging larger foreign matters.

Drawings

FIG. 1 is a schematic structural view of a conventional hood;

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

FIG. 3 is a top view of the air distribution plate of the present invention;

fig. 4 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A in fig. 3.

Detailed Description

As shown in fig. 2 to 4, the air distribution and waste discharge structure for burning solid waste comprises an air distribution plate 1, wherein the air distribution plate 1 is provided with a slag discharge port 2 and is provided with an air cap 3, the air cap head of the air cap 3 is of a round head structure, the height H1 of an air outlet 4 on the air cap head is 22-23mm, the diameter is 10-10.5mm, the height H2 of the air cap 3 is 124-125mm, the transverse pitch H3 among the air caps 3 is 170-175mm, the ratio of the depth of the air distribution plate 1 to the depth of a hearth is 35-40%, the number of slag discharge pipes is four, and the diameter D is 240-250mm; an air cannon is arranged on the slag falling pipe connected with the slag discharging port 2.

A blast cap head of a blast cap on a blast plate adopts a round head structure, and compared with the existing blast cap shown in figure 1, the blast cap can prevent iron wires from being hung and bound in a groove at the top of the blast cap;

compared with bed materials, the iron wire iron nails and the like have large density difference, the whole bed surface is in a fluidized state with different specific gravity, the iron wire iron nails and the like are deposited on the castable of the air distribution plate, only the bed materials flow on the heavy materials (like water flow and cobbles on the riverbed) during slag discharge, the iron wire iron nails cannot be driven, the height H1 of an air outlet on the blast cap is reduced to 22mm, the air outlet is close to the castable, the iron wire iron nails can be blown, meanwhile, the diameter of the air outlet is reduced to 10-10.5mm, the air outlet speed is increased to 70-75m/s, longer iron wires at high temperature can be blown to be cut off at high air speed, the removal is convenient, high momentum is brought by the high air speed, the deposited iron wire iron nails and the like can be blown loose, and the iron wire iron nails and the like move towards a slag discharge port under the wrapping of bottom slag and are discharged;

the height of the blast caps H2 is reduced to 124mm, and the transverse pitch H3 between the blast caps is improved to 175mm, so that iron nails, iron wires and the like can flow towards the slag falling port between the blast caps;

the utility model discloses in, the proportion that the grid plate area accounted for upper portion furnace area reduces, and conventional coal stove percentage generally is ~45%, and utility model's the degree of depth L of grid plate is 37% with furnace degree of depth ratio, and little cross-section accounts for and means hood quantity reduction, is exactly in order to guarantee under the same amount of wind, improves hood aperture speed and grid plate department cross section speed.

The slag discharging pipe increases the number to four, the diameter increases to 250mm, the number increases and makes iron nail, iron wire etc. near a little from corresponding slag discharging opening, but the slag discharging pipe is not more the better, too much slag discharging pipe means that the slag discharging quantity of every slag discharging pipe reduces to do not do benefit to the discharge of iron nail, iron wire. The diameter of the slag discharging pipe is properly increased, the original diameter phi 219 is changed into the diameter phi 250, if larger foreign matters exist, the slag discharging pipe can also be discharged from the slag pipe, the larger the slag discharging pipe is, the better the slag discharging pipe is, the larger the slag discharging pipe is, the fluidization at the periphery of the slag discharging pipe is difficult due to the oversize slag discharging pipe, and the coking phenomenon (on a solid waste coal-mixed boiler) is easy to generate.

Two bed material replacement ports are independently arranged on the front wall or the side wall of the boiler, on one hand, bed materials are continuously added in normal operation, certain slag discharge amount is maintained, and partial iron nails and the like are discharged. However, some iron wires, iron nails, etc. remain in the hearth, and there may be large foreign matters such as iron blocks, broken bricks, hinges, etc. in the solid waste, which are not easy to flow, and the large foreign matters cannot be discharged by the normal slag discharge, so that it is necessary to increase the flow of the bed surface material in a short time, so that the large heavy matters which are difficult to discharge move to the slag discharge port under the wrapping of the material. At this time, the amount of the supplementary bed material needs to be increased, a large amount of slag is discharged, and the bed material is replaced to improve the quality of the bed material.

An air cannon is arranged on a slag falling pipe connected with a slag discharge port, when the top of the slag discharge port is blocked by foreign matters or coke blocks and is difficult to discharge slag smoothly, the air cannon is started, high pressure is instantaneously generated in the slag falling pipe to break away blocking objects, and the slag discharging is smooth.

Claims

1. The utility model provides a solid waste's of burning cloth wind exhaust structure, its includes the grid plate, seted up the cinder notch and installed the hood on the grid plate, its characterized in that, the hood head of hood is the button head structure and the overhead air outlet height of hood is 22-23mm, the diameter is 10-10.5mm, the height of hood is 124-125mm, the horizontal pitch between the hood is 170-175mm, the degree of depth and the furnace degree of depth ratio of grid plate are 35-40%.

2. The air distribution and waste discharge structure for burning solid waste of claim 1, wherein the number of the slag discharge ports is four and the diameter is 240-250mm.

3. The air distribution and waste discharge structure for burning solid waste of claim 1, wherein the slag pipe connected with the slag discharge port is provided with an air cannon.