阅读说明：本技术 一种纯氧燃烧消除液态排渣锅炉挂焦的方法及装置 (Method and device for eliminating coke hanging of liquid slag discharging boiler by pure oxygen combustion ) 是由 王智微 于 2021-08-13 设计创作，主要内容包括：本发明提供一种纯氧燃烧消除液态排渣锅炉挂焦的方法及装置,包括液态渣结焦控制喷射器,所述液态渣结焦控制喷射器与电厂的氧气罐通过氧气连接管连接,所述液态渣结焦控制喷射器包括氧气管道,氧气管道末端设置有用于加速氧气的喷嘴。本发明可以使结焦渣中的可燃质实现二次燃烧,使结焦渣温度再次达到灰的流化温度,结焦渣重新开始流动,达到消除挂焦的作用。(The invention provides a method and a device for eliminating coke hanging of a slag tapping boiler by pure oxygen combustion. The invention can realize secondary combustion of combustible substances in the coking slag, ensure that the temperature of the coking slag reaches the fluidization temperature of ash again, and the coking slag starts to flow again, thereby achieving the effect of eliminating coke hanging.)

1. The utility model provides a burnt device is hung to slag boiler of pure oxygen burning elimination liquid, its characterized in that, includes liquid sediment coking control sprayer (7), liquid sediment coking control sprayer (7) are connected through oxygen connecting pipe (1) with oxygen tank (11) of power plant, liquid sediment coking control sprayer (7) include oxygen pipeline (3), and oxygen pipeline (3) end is provided with nozzle (5) that are used for oxygen with higher speed.

2. The pure oxygen combustion apparatus for eliminating slagging boiler coke hanging device according to claim 1, wherein the oxygen pipeline (3) is provided with a check valve (2) and a valve (4), the check valve (2) is used for preventing oxygen from flowing backwards, and the valve (4) is used for adjusting the flow of oxygen, namely the flow velocity of oxygen at the outlet of the nozzle (5).

3. The use method of the pure oxygen combustion elimination slagging boiler coke hanging device according to any one of claims 1-2, characterized by comprising the following steps;

when coking occurs, a liquid slag coking control ejector (7) and an oxygen connecting pipe (1) are provided, the flow of oxygen can be adjusted through a valve (4), the nozzle (5) accelerates the oxygen to be sent to the vicinity of the liquid slag (6), the oxygen and combustible substances in the liquid slag are combusted to improve the deslagging temperature to be higher than the fluidization temperature (1100 plus 1200 ℃) of the slag, and the coked slag is re-melted into a liquid state and is blown off by the oxygen at the same time.

4. The use method of the pure oxygen combustion coke hanging device for the slag tapping boiler as claimed in claim 3, wherein the oxygen is pure oxygen.

Technical Field

The invention belongs to the technical field of power generation industry, and particularly relates to a method and a device for eliminating coke hanging of a slag tapping boiler by pure oxygen combustion.

Background

For boilers burning low ash fusion point coal, slag is generally removed by a slag tapping method. In the slag tapping process, due to various reasons, liquid slag is often coked in the slag tapping process, so that slag tapping is not smooth, even a slag tapping hole is blocked, and the operation reliability of a boiler is reduced. The traditional treatment mode is usually treated by adopting methods such as manual knocking, high-pressure water impacting and the like, the treatment is difficult and untimely, and hidden dangers also exist in personnel safety.

Disclosure of Invention

In order to solve the problem that liquid slag is often coked in the slag tapping process, the invention aims to provide the method and the device for eliminating the coke hanging of the slag tapping boiler by pure oxygen combustion, which can realize secondary combustion of combustible substances in coking slag, ensure that the temperature of the coking slag reaches the fluidization temperature of ash again, and ensure that the coking slag begins to flow again to achieve the effect of eliminating the coke hanging.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a burnt device is hung to slag boiler of pure oxygen burning elimination liquid, includes liquid sediment coking control sprayer 7, liquid sediment coking control sprayer 7 includes oxygen pipeline 3, and oxygen pipeline 3's tail end passes through oxygen connecting pipe 1 with the oxygen tank 11 of power plant and is connected, and 3 ends of oxygen pipeline are provided with the nozzle 5 that is used for oxygen with higher speed.

Be provided with check valve 2 and valve 4 on the oxygen pipeline 3, check valve 2 is used for preventing the oxygen refluence, valve 4 is used for adjusting the flow of oxygen, the oxygen velocity of flow of 5 exports of nozzle promptly.

The liquid slag coking control ejector 7 is composed of an oxygen pipeline 3, a check valve 2, a valve 4 and a nozzle 5, wherein the oxygen pipeline 3 is used for conveying oxygen, the check valve 2 prevents the oxygen from flowing back to an oxygen tank 11, the valve 4 is used for adjusting the flow of the oxygen, and the nozzle 5 plays a role in accelerating the oxygen.

A method for using a coke hanging device of a slag tapping boiler for pure oxygen combustion elimination comprises the following steps;

when coking occurs, a liquid slag coking control ejector 7 and an oxygen connecting pipe 1 are provided, the flow of oxygen can be regulated through a valve 4, the nozzle 5 accelerates the oxygen to be sent to the vicinity of the liquid slag 6, the oxygen and combustible substances in the liquid slag are combusted to improve the slag discharging temperature to be higher than the fluidization temperature (1100-1200 ℃) of the slag, and the coking slag is re-melted into liquid and blown off by the oxygen.

The oxygen is pure oxygen.

The invention has the beneficial effects that:

the invention melts the coking slag into liquid through the oxygen and the high-temperature flue gas burnt by combustible substances in the liquid slag, and can solve the problem of coking of the liquid slag in the slag discharging process.

The method is simple and practical, reduces the labor intensity of knocking and decoking by a mechanical mode, and realizes civilized and safe production. The structure is simple and easy to operate.

Drawings

FIG. 1 is a schematic view of the normal liquid slag flow of the present invention.

FIG. 2 is a schematic diagram of coking around liquid slag according to the present invention.

FIG. 3 is a schematic diagram of a liquid slag coking control injector according to the present invention.

FIG. 4 is a diagram of a liquid slag coking control system of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 3: the device has the important components of a liquid slag coking control injector 7, wherein the liquid slag coking control injector 7 comprises an oxygen pipeline 3 and a nozzle 5 arranged at the tail end and is connected with an oxygen connecting pipe 1 of a power plant. The oxygen pipeline 3 is respectively provided with a check valve 2 and a valve 4, the check valve 2 prevents oxygen from flowing backwards, and the valve 4 regulates oxygen flow. The nozzle 5 plays a role in accelerating oxygen, so that the oxygen can be quickly sent to a coking position to be combusted, and the liquid slag is blown.

The normal liquid slag flow is shown in figure 1, and after coking occurs, the coking phenomenon around the liquid slag is shown in figure 2. When coking occurs, the liquid slag coking control ejector 7 is combined with the oxygen connecting pipe 1, the oxygen flow is adjusted through the valve 4, the oxygen is accelerated by the nozzle 5 and then is sent to the position near the liquid slag 6 to be combusted with combustible substances in the liquid slag, and the coking slag is melted into liquid and blown off by the oxygen.

As shown in fig. 4: when the slag tapping appears coking, the valve 4 is opened, and oxygen is sent to the coking part near the coking opening 9 of the boiler to be burnt with combustible substances in the slag tapping. The valve 4 can control the oxygen flow, thereby adjusting the combustion temperature and the combustion intensity of the liquid slag. The direction of the nozzle 5 of the liquid slag coking control injector 7 can be adjusted according to the specific position of the liquid slag discharging coking until reaching the slag discharging port 8. The melted coke falls into the cold slag hopper 10.