CN215062151U - Device for preventing unburned coal dust particles on steel belt chain of dry slag discharging system from catching fire - Google Patents

Abstract

The utility model discloses a device for preventing unburned coal dust particles on a steel belt chain of a dry slag discharging system from catching fire, which comprises a plurality of gas storage tanks and an air box, wherein the gas storage tanks are arranged around dry slag discharging equipment; the air box is connected with the air storage tank through an air duct and is communicated with the upper part of the slag well. The utility model is suitable for a coal-fired unit that "spark" often appears in big sediment that falls into on the steel band can form the inert gas protective layer on big sediment surface to improve the safe operation of dry row's sediment system.

Description

Device for preventing unburned coal dust particles on steel belt chain of dry slag discharging system from catching fire

Technical Field

The utility model belongs to the technical field of energy-concerving and environment-protective, a device that pulverized coal granule that does not burn completely catches fire on preventing dry slag removal system steel band chain is related to.

Background

The working process of the air-cooled mechanical dry slag removal system comprises the steps of collection → pre-crushing → conveying and cooling → crushing → storage → periodic discharge and the like, but when part of coal is combusted, as large slag falling into a slag well has more unburned particles, the air-cooled mechanical dry slag removal system sucks cooling air by using the negative pressure of a boiler furnace, the oxygen content in the air is higher, the large slag falling onto a steel belt chain is frequently re-combusted, the local temperature of the steel belt is increased, the upper limit of the temperature which can be borne by the steel belt in the dry slag removal system is generally not more than 150 ℃, and the temperature of a shell of the slag removal machine needs to be kept below 50 ℃, so the re-combustion of the large slag poses great threat to the safe operation of the steel belt, and an effective mode is often lacked in the actual operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to prevent that the buggy granule that does not burn to the greatest extent from catching fire on the dry slag removal system steel band chain, provide a device that prevents to burn to the greatest extent buggy granule on the dry slag removal system steel band chain from catching fire. The utility model discloses can prevent to fall into the big sediment on the steel band chain and burn again to adjust the inert gas flow who spouts into the sediment well according to the demand, guaranteed the safe operation of dry row's sediment system.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

prevent on dry slag removal system steel band chain device that coal dust particle of unburnt up catches fire, include:

the gas storage tanks are arranged around the dry slag discharging equipment;

and the air box is connected with the air storage tank through an air duct and is communicated with the upper part of the slag well.

The utility model discloses further improvement lies in:

1-5 gas storage tanks are arranged around the dry slag discharging equipment.

And a row of nozzles are arranged at the upper part of the slag well, and the outer sides of the nozzles are wrapped by an air box.

The spout is a rectangular spout.

The dimensions of the rectangular spout are as follows: the width a is 20-30 mm, and the length b is 40-60 mm.

The gas storage tank is stored with liquid heptafluoropropane.

And a pneumatic regulating valve is arranged on the air channel.

The number of the gas storage tanks is determined according to the requirements of the coal-fired boiler.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses arrange one or more gas holders around dry slag discharging system, store liquid heptafluoropropane in this gas holder, when having the granule that does not burn completely on dry slag discharging steel band chain and continue burning, liquid heptafluoropropane in the gas holder passes through the pipeline with gaseous form and gets into bellows, the spout that the rethread was arranged on the side wall spouts in the sediment well, form one deck inert gas layer at dry slag discharging system steel band chain shape of face, the buggy granule that will catch fire is isolated with oxygen, buggy granule no longer continues the burning, transport toward the sediment storehouse through the steel band under flameout state. The utility model discloses arrange an bellows on sediment well upper portion (dry row sediment system changeover portion front wall side, back wall side), bellows and sediment well sealing connection, one row of spout is arranged to the wall side around the sediment well, and the air intake of bellows is through arranging the pneumatic control valve control on bellows import wind channel. The utility model discloses can spout into inert gas rapidly after the granule "after reburning" on the steel band chain not to burn to put out a fire with the big sediment after the reburning, thereby prevent that the steel band from moving the temperature and surpassing the safety requirement. Secondly, the utility model discloses can adjust the heptafluoropropane flow who spouts into the sediment well through automatic regulating valve, improve this inert gas's utilization efficiency. Finally, the utility model discloses heptafluoropropane does not contain solid dust, oil stain, is that the liquid state stores gaseous state and releases, can discharge naturally or discharge rapidly by ventilation system after spouting, and the scene does not have the residue and does not have the secondary to the protection object and destroy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of the rectangular nozzle of the present invention.

Wherein, the device comprises 1-dry slag discharge equipment, 2-gas storage tank, 3-pipeline, 4-pneumatic regulating valve, 5-bellows, 6-nozzle and 7-slag well.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship that the product of the present invention is usually placed when in use, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, 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 according to specific situations by those skilled in the art.

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

referring to fig. 1, the embodiment of the utility model discloses a device for preventing the ignition of unburned coal dust particles on a steel belt chain of a dry slag discharging system, which comprises a plurality of gas storage tanks 2 and a wind box 5, wherein the gas storage tanks 2 are arranged around a dry slag discharging device 1; 1-5 gas storage tanks 2 are arranged around the dry slag discharging equipment 1. The number of the specific gas storage tanks 2 is determined according to the requirements of the coal-fired boiler. The air box 5 is connected with the air storage tank 2 through the air duct 3, and the air box 5 is communicated with the upper part of the slag well 7. And a row of nozzles 6 are arranged at the upper part of the slag well 7, and the outer sides of the nozzles 6 are wrapped by air boxes 5. The spout 6 is a rectangular spout. The dimensions of the rectangular spout are as follows: the width a is 20-30 mm, and the length b is 40-60 mm. The gas storage tank 2 is stored with liquid heptafluoropropane. And a pneumatic regulating valve 4 is arranged on the air duct 3.

The utility model discloses a structural principle:

the utility model discloses arrange 1 ~ 5 gas holders 2 around dry sediment equipment 1, arrange the gas holder 2 of reasonable quantity according to the boiler demand of burning different coal types. A row of nozzles 6 are arranged at the upper part of the slag well 7, the outer sides of the nozzles 6 are wrapped by an air box 5, the air box 5 is connected with an air duct 3, and the air duct 3 is provided with a pneumatic regulating valve 4.

As shown in FIG. 2, the length a of each rectangular nozzle is 20-30 mm, and the length b is 40-60 mm. By the design, the rectangular nozzle 6 has better spraying effect.

The utility model discloses a working process:

when the unit normally operates, liquid heptafluoropropane enters an air box 5 through an air duct 3, and gaseous heptafluoropropane in the air box 5 is sprayed into a slag well 7 through a nozzle 6 and directly reaches the surface of a steel belt chain, so that an inert gas protective layer is formed on the surface of large slag, the large slag containing unburned coal powder particles is prevented from being re-combusted, and the safe operation of the dry slag discharging equipment 1 is protected.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. Prevent on dry slag removal system steel band chain device that coal dust particle that unburnt up catches fire, its characterized in that includes:

the gas storage tanks (2) are arranged around the dry slag discharging equipment (1);

and the air box (5) is connected with the air storage tank (2) through an air duct (3), and the air box (5) is communicated with the upper part of the slag well (7).

2. The device for preventing the ignition of unburned coal powder particles on the steel belt chain of the dry slag discharging system according to claim 1, wherein 1-5 air storage tanks (2) are arranged around the dry slag discharging equipment (1).

3. The device for preventing the ignition of unburned coal powder particles on a steel belt chain of a dry slag discharging system according to claim 1, wherein a row of nozzles (6) is arranged at the upper part of the slag well (7), and the outer side of the nozzles (6) is wrapped by an air box (5).

4. The device for preventing the ignition of unburned coal powder particles on the steel belt chain of the dry slag removal system according to claim 3, wherein the nozzle (6) is a rectangular nozzle.

5. The apparatus for preventing the ignition of unburned coal powder particles on the steel belt chain of the dry slag removal system according to claim 4, wherein the rectangular nozzle has the following dimensions: the width a is 20-30 mm, and the length b is 40-60 mm.

6. The apparatus for preventing the ignition of unburned coal powder particles on a steel belt chain of a dry slag discharging system according to claim 1, wherein said air container (2) stores liquid heptafluoropropane.

7. The device for preventing the ignition of unburned coal powder particles on a steel belt chain of a dry slag discharging system according to claim 1, wherein a pneumatic regulating valve (4) is arranged on the air duct (3).

8. The apparatus for preventing the ignition of unburned coal powder particles on a steel belt chain of a dry slag discharging system according to claim 1, wherein the number of the air containers (2) is determined according to the requirements of a coal-fired boiler.

Images