KR100277016B1 - Fuel supply device of solid fuel combustor - Google Patents

Abstract

The present invention relates to a fuel supply device for a solid fuel combustor. The present invention provides a funnel-shaped hopper filled with agglomerated solid fuel, a solid fuel pulverizer installed at an outlet of the hopper for pulverizing a solid fuel in a lump state, a box-shaped case having an opening formed at one side, and the solid A pulverized fuel supply pipe for supplying the fuel pulverized by the fuel crusher into the box-shaped case, and the pulverized fuel installed in the box-shaped case and supplied through the pulverized fuel supply pipe to the grate of the combustion chamber through the opening of the box-shaped case. It is characterized in that it comprises a horizontal impeller to spray, and a water spray nozzle which is installed above the opening of the box-shaped case and sprays water to the pulverized fuel sprayed to the grate of the combustion chamber through the opening. Therefore, compared with the conventional method of supplying solid fuel in the form of lumps such as coal briquettes, it is small and inexpensive, thereby reducing the installation location and cost, and greatly improving the combustion rate of the fuel to about 90%.

Description

Fuel supply device of solid fuel combustor

The present invention relates to a fuel supply apparatus for a solid fuel combustor, and more particularly, to a solid fuel combustor for pulverizing solid fuel in a lump state and supplying the pulverized solid fuel in a uniform manner by spraying the combustor with a combustor. It relates to a fuel supply device.

Conventionally, a fuel supply device for a solid fuel combustor is used as a bottom-loading stoker as shown in FIG. 1, and the bottom-loading coal-feeding machine uses a solid fuel in the form of agglomerate such as briquettes supplied through the hopper 2. The screw 3 is rotated so as to be pushed up to the grate 4 to be supplied.

However, the fuel distribution device of the conventional solid fuel combustor configured as described above is large and expensive, and thus requires a large installation place and a large cost, and also supplies a solid fuel in the form of agglomerates such as coal briquettes. Has a big problem of loss of solid fuel since combustion of solid fuel starts burning from its surface and is pushed out by newly supplied solid fuel before internal combustion. .

In addition, such a conventional fuel distribution device is configured to supply a solid fuel in the form of agglomerate, such as shell coal in its structure, when supplying a solid fuel in the form of powder, a certain amount of powder in order to prevent the flying of the solid fuel in the form of powder In the case of supplying water in this way, the solid fuel in powder form sticks to the screw and its surroundings in a solid state, so it is difficult to smoothly push up the solid fuel in powder form, and the device must be cleaned frequently. There was a troublesome use.

The present invention has been made to solve the above-mentioned problems, and the fuel distribution device of the solid fuel combustor, which is capable of pulverizing the solid fuel in the lump state and efficiently distributing the solid fuel in the form of pulverized powder to the combustor. The purpose is to provide.

In order to achieve the above object, the present invention provides a funnel-shaped hopper filled with a solid fuel in the form of a lump, a solid fuel pulverization unit installed at an outlet of the hopper for pulverizing the solid fuel in the form of a lump, and the solid fuel pulverization. A box-shaped case positioned at a lower portion of the part and having an opening at one side thereof, a pulverized fuel supply pipe for supplying fuel pulverized by the solid fuel pulverizer into the box-shaped case, and installed inside the box-shaped case and providing the pulverized fuel supply pipe Horizontal impeller spraying the pulverized fuel supplied through the opening of the box-shaped case to the grate of the combustion chamber, and water spraying water to the pulverized fuel sprayed to the grate of the combustion chamber through the opening to be installed on the upper inner surface of the opening of the box-shaped case It provides a fuel supply device for a solid fuel combustor comprising an injection nozzle, There are Jing.

1 is a cross-sectional view schematically showing a fuel supply device of a conventional solid fuel combustor,

2 is a front view showing a partial ablation of the fuel supply apparatus of the solid fuel combustor according to the present invention;

3 is a partially cutaway perspective view showing an extract of a solid fuel pulverization unit of a fuel supply device of a solid fuel combustor according to the present invention;

4 is a cross-sectional view showing the engaged state of the first and second grinding gears shown in FIG.

5 is a partially cutaway perspective view showing an extract of the pulverized fuel spraying unit of the fuel supply device of the solid fuel combustor according to the present invention;

6 is a plan view showing an extract of the horizontal impeller shown in FIG.

<Description of the code | symbol about the principal part of drawing>

11: hopper 12: outlet

13: pulverized fuel supply pipe 14: box type case

14a: opening 15: grate

20: solid fuel grinding unit 21: first grinding gear

22: 2nd grinding gear 23, 24: rotating shaft

26: motor 30: water spray nozzle

40: horizontal impeller 42: disc

43: straight wing 44: curved wing

45: rotating shaft 51: the first bevel gear

52: second bevel gear

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a front view showing a fuel supply device of a solid fuel combustor according to the present invention. Figure 3 is a partial ablation perspective view showing an extract of the solid fuel pulverization of the fuel supply device of the solid fuel combustor according to the present invention, Figure 4 is a partial ablation perspective view showing an extract of the pulverized fuel sprayer of the solid fuel combustor according to the present invention 5 is a plan view showing an extract of the horizontal impeller shown in FIG.

The fuel supply apparatus of the solid fuel combustor according to the present invention, as shown in Fig. 2 and 5, the funnel-shaped hopper 11 is filled with a solid fuel in a lump state, and the outlet 12 of the hopper 11 The upper surface is connected by the solid fuel crushing unit 20, which is installed in the pulverized solid fuel to pulverize the solid fuel, and the solid fuel crushing unit 20 and the pulverized fuel supply pipe 13 to supply the pulverized fuel to the inside. A box-shaped case 14 and a grate 15 of the combustion chamber located at the lower portion of the box-shaped case 14 are provided.

And the solid fuel grinding unit 20, as shown in detail in Figure 3 is rotatably installed in a state parallel to each other by the respective rotary shafts 23, 24 in the discharge port 12 of the hopper (11). A first grinding gear 21 and a second grinding gear 22 having a cylindrical shape are provided.

The first grinding gear 21 and the second grinding gear 22 are installed in a state of being engaged with each other with a predetermined gap (about 20-30 mm) G therebetween, as shown in FIG. 1 The motor 25 is installed on one side of the rotating shaft 23 of the grinding gear 21.

In addition, the box-shaped case 14 has an opening 14a formed at one side as shown in FIG. 5, and a water spray nozzle 30 for spraying water is provided at an upper inner surface of the opening 14a, and the box-shaped case 14 is provided. ), A horizontal impeller 40 for spraying the pulverized fuel supplied through the pulverized fuel supply pipe 13 to the grate 15 of the combustion chamber through the opening 14a of the box-shaped case 14 is rotated by the rotating shaft 45. It is rotatably installed.

5 and 6, the horizontal impeller 40 includes a disc 42 having a boss 41 on which a rotating shaft 45 is installed at a central portion thereof, and a boss on an upper surface of the disc 42. 41 is composed of a plurality of linear wings 43 provided at regular intervals, and a plurality of curved wings 44 provided between the plurality of linear wings 43.

As shown in FIG. 2, the other side of the rotating shaft 23 of the first grinding gear 21 and the other side of the rotating shaft 45 of the horizontal impeller 40 extend to be perpendicular to each other, and the ends thereof are meshed with each other to form the solid described above. The first bevel gear 51 and the second bevel gear 52 are installed to transmit the power generated by the motor 25 of the fuel crusher 20 to the horizontal impeller 40 to drive the horizontal impeller 40. do.

The fuel supply device of the solid fuel combustor according to the present invention configured as described above is operated as follows.

First, the solid fuel crushing unit 20 is operated in the state in which the hopper 11 is filled with the solid fuel in the form of lumps. That is, as the first grinding gear 21 is rotated by driving the motor 25 of the solid fuel grinding unit 20, the second grinding gear 22 engaged with the predetermined gap G is rotated. Through the gap G between them, the solid fuel in the form of agglomerates is pulverized.

The pulverized solid fuel is supplied into the box-shaped case 14 through the pulverized fuel supply pipe 13, and the pulverized fuel supplied into the box-shaped case is a first bevel installed on the rotating shaft 23 of the first grinding gear 21. The horizontal impeller 40 which rotates in a clockwise direction by receiving the power of the motor 25 of the grinding unit 20 through the second bevel gear 52 installed on the rotation shaft 45 of the gear 51 and the horizontal impeller 40. By the sprayed through the opening 14a of the box-shaped case 14 to the grate 15 of the combustion chamber.

At the same time, the water spray nozzle 30 installed on the upper inner surface of the opening 14a of the box-shaped case 14 is operated to inject water into the pulverized fuel sprayed by the horizontal impeller 40 to prevent the pulverized fuel from flying. do.

In the process of spreading the pulverized fuel to the grate 15 by the rotation of the horizontal impeller 40, the crushed fuel is sprayed away by the linear blade 43 of the horizontal impeller 40 and the curved wing 44 By this, the pulverized fuel is spread widely and spread in a short distance. Therefore, the pulverized fuel is supplied evenly over the entire range of the grate 15 by the rotation of the horizontal impeller 40 in which the linear blade 43 and the curved blade 44 are repeatedly arranged.

As described above, according to the fuel supply apparatus of the solid fuel combustor of the present invention, since the solid fuel in the pulverized state is pulverized and the fuel in the form of pulverized powder is uniformly supplied over the entire range of the grate. Compared to the method of supplying the solid fuel in the form of agglomerate, it is small and inexpensive, so it is possible to reduce the installation place and cost, and the combustion rate of the fuel is improved by about 90%. Has

Claims (4)

A funnel-shaped hopper filled with agglomerated solid fuel, A solid fuel pulverization unit installed at an outlet of the hopper for pulverizing solid fuel in a lump state; A box-shaped case having an opening formed at one side thereof, A pulverized fuel supply pipe for supplying fuel pulverized by the solid fuel pulverizer into the box-shaped case; A horizontal impeller installed inside the box-shaped case and spraying the pulverized fuel supplied through the pulverized fuel supply pipe to the grate of the combustion chamber through the opening of the box-shaped case; And a water injection nozzle disposed above the opening of the box-shaped case and spraying water on the pulverized fuel sprayed through the opening to the grate of the combustion chamber. According to claim 1, wherein the solid fuel grinding unit, the first grinding gear and the second grinding gear which is rotatably installed in the outlet of the hopper by the rotary shaft, respectively, with a gap therebetween, and the first grinding gear, A fuel supply device for a solid fuel combustor, comprising: a motor connected to a rotating shaft of a grinding gear to drive a first grinding gear. According to claim 2, wherein the rotating shaft of the first grinding gear and the one side of the rotating shaft of the horizontal impeller extends to be perpendicular to each other, the first bevel gear and the second bevel gear meshed with each other are provided, respectively, the motor A fuel supply device for a solid fuel combustor, characterized in that the power of the through it is transmitted to the horizontal impeller. According to claim 1, wherein the horizontal impeller between the disk and the boss is provided with a rotation shaft is installed in the center, a plurality of linear wings are provided at regular intervals centering the boss on the upper surface of the disk between the plurality of linear wings Fuel supply device for a solid fuel combustor, characterized in that consisting of a plurality of curved wings installed in the.