KR20160136260A - Firebox of pellet hot_water boiler - Google Patents

Abstract

The present invention relates to a firebox of a pellet hot water boiler, which generates hot water by using pellets as fuel. The firebox of a pellet hot water boiler, according to the present invention, comprises: an inner container (110) which is composed of a lower sphere part (111) and an upper cylindrical part (112) where first and second water jackets (WJ1, WJ2) are formed, respectively; an intermediate container (120); and an outer container (130), wherein the intermediate container (120) forms first and second gas paths (GP1, GP2) between the inner container (110) and the outer container (130).

Description

FIREBOX OF PELLET HOT_WATER BOILER FOR PELLET HOT WATER BOILER

The present invention relates to a firebox for a pellet hot water boiler for producing hot water by using pellets as a fuel, and more particularly, to a firebox for a pellet hot water boiler which comprises a lower concrete part and an upper cylindrical part, And a water jacket is formed in the lower sphere part and the upper cylindrical part to surround the periphery of the flame combustion space.

Korean Patent No. 10-1389507 (registered on Apr. 21, 2014), "Pellet boiler" is introduced.

The upper end of the lower cylinder is connected to a flange formed around the upper end of the lower cylinder. The lower end of the lower cylinder is connected to a lower end of the lower cylinder. And a lower end of the upper inner cylinder is welded to an upper end of a vertical portion of the lower cylinder, an upper inner cylinder is disposed inside the upper outer cylinder, and a lower end of the upper outer cylinder and the upper inner cylinder The upper intermediate cylinder is supported by the upper inner cylinder by a plurality of pedestals, a first gas cylinder is formed in the upper inner cylinder, and a second gas cylinder is provided between the upper inner cylinder and the upper intermediate cylinder A third gas passage is formed between the upper middle passage upper annulus, a combustion gas discharge pipe is connected to the upper annulus, and a spiral wound first water passage is formed in the upper portion A third water tube wound in a helical shape is disposed in close contact with an inner peripheral surface of the upper middle cylinder and a fourth water tube wound in a helical shape is disposed in close contact with the inner peripheral surface of the cylinder, And a fifth water pipe wound in a helical shape is disposed in close contact with an inner peripheral surface of the upper outer tube, low temperature water is supplied to the fifth water pipe, and the fifth water pipe is connected to the first to the 4 water tubes, and the first to fourth water tubes are connected to the head box disposed on the upper inner cylinder.

However, the above-mentioned conventional firebox for a pellet boiler has a disadvantage that it can not recover the heat discarded from the outer cylinder, and does not allow the combustion in the lower cylinder to be well performed, and can not withstand the high pressure.

Accordingly, it is an object of the present invention to provide a flame burning apparatus and a flame burning apparatus, wherein the inner cylinder is composed of a lower rigid portion and an upper cylindrical portion, A water jacket is formed in the lower sphere part and the upper cylindrical part, and the water jacket surrounds the circumference of the flame combustion space, so that the heat generated by the combustion of the flame causes the water filled in the water jacket to be heated It is possible to minimize discarding of heat to the outside and to withstand the high pressure generated in the flame combustion owing to the structural characteristic of the sphere of the lower sphere part, And the secondary head box, and then supplied to the reverse tank, whereby the water hammer phenomenon can be prevented, and the reverse tank From the steam, it is possible to sufficiently discharge the gas such as air, to provide a pellet boiler hot water chamber for the cylinder can be prevented from the heat exchange efficiency of the heat exchanger by the gas decreases.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a firebox for a pellet hot water boiler comprising a inner cylinder, an intermediate cylinder, and an outer cylinder and a first cylinder and a second cylinder, The inner cylinder is composed of the lower concrete part and the upper cylinder part, the lower concrete part is formed in the shape of the convex jar, the spherical flame combustion space is formed in the lower concrete part, the lower end of the upper cylinder part is connected to the upper hole of the lower concrete part A first water jacket and a second water jacket are respectively formed in the lower concrete portion and the upper cylindrical portion of the inner tube, the first water jacket of the lower concrete portion and the second water jacket of the upper cylindrical portion are connected, A low temperature water supply pipe is connected to the lower end, a primary head box is disposed above the upper cylindrical portion of the inner cylinder, an upper end of the upper cylindrical portion is connected to the primary head box by a first connection pipe, A secondary headbox disposed at an upper portion of the headbox is disposed between the middle passage outer cylinder, a primary headbox and a secondary headbox are connected by a second connection pipe, a reverse tank is disposed at an upper portion of the outer cylinder, The cold head tank and the reverse tank are connected by the third connection pipe, the reverse tank is connected by the heat exchanger and the first circulation pipe, the heat exchanger and the low temperature water supply pipe are connected by the second circulation pipe, And the first pump is mounted.

Further, in the firebox for a pellet hot water boiler according to the present invention, the first spiral tube and the second spiral tube spirally wound on the first gas passage are disposed, the third spiral tube spirally wound on the second gas passage, And the lower ends of the first through fourth helical tubes are connected to the lower sphere portion of the inner tube and the upper ends of the first through fourth helical tubes are connected to the reverse tank by the eighth through eleventh connection tubes .

Accordingly, the firebox of the pellet hot water boiler according to the present invention can easily rise into the flame combustion space of the flue, and the flame is burned well due to the expanded flame combustion space, and the heat generated by the combustion of the flame, It is possible to minimize discarding of the heat to the outside and to withstand the high pressure generated in the flame combustion owing to the structural characteristics of the sphere of the lower sphere portion so that the life of the boiler is increased, It is possible to minimize heat that is discarded by recovering the heat of the heat exchanger.

1 is a schematic view of a pellet hot water boiler according to the present invention;
FIG. 2 is a schematic view schematically showing a part of a firebox for a pellet hot water boiler according to the present invention. FIG.
FIG. 3 is a view showing a firebox for a pellet hot water boiler according to the present invention

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

Referring to Figure 1, generally, a pellet hot water boiler comprises a hearth 30 for burning pellets, a pellet feeder 20 for feeding the pellets into a hearth 30, And a firebox (10) for heating water with heat generated by combustion of the pellets.

2, a firebox 10 for a pellet hot water boiler according to the present invention includes an inner cylinder 110, an intermediate cylinder 120, and an outer cylinder 130. The inner cylinder 110 is connected to the inner cylinder 110 by an intermediate cylinder 120, A first gas passage GP1 and a second gas passage GP2 are formed between the outer cylinder 130 and the outer cylinder 130. The inner cylinder 110 is composed of the lower solid portion 111 and the upper cylindrical portion 112, A spherical flame combustion space 115 is formed in the lower sphere part 111 and an upper cylindrical part 112 is formed in an upper hole of the lower sphere part 111. [ A first water jacket WJ1 and a second water jacket WJ2 are formed on the lower and upper cylindrical portions 111 and 112 of the inner tube 110 and the lower concrete portion 111 The first water jacket WJ1 of the first water jacket WJ1 is connected to the second water jacket WJ2 of the upper cylindrical portion 112. The low temperature water supply pipe SP is connected to the lower end of the first water jacket WJ1, 110 on the upper cylindrical portion 112, A head box 140 is disposed so that the upper end of the upper cylindrical portion 112 is connected to the primary head box 140 by a first connection pipe CP1, The secondary head box 145 is disposed between the intermediate cylinder 120 and the outer cylinder 130 and the primary head box 140 and the secondary head box 145 are connected by the second coupling pipe CP2 And a reverse tank 150 is disposed on the upper portion of the outer cylinder 130. The secondary head box 145 and the reverse tank 150 are connected by a third connection pipe CP3 and the reverse tank 150 is heat- And the heat exchanger 160 and the low temperature water supply pipe SP are connected by the second circulation pipe RP2 and the second circulation pipe RP2 is connected by the first circulation pipe RP1 and the second circulation pipe RP2, A first pump 165 is mounted.

The reverse tank 150 is provided with an air vent valve (not shown), a water level measuring means (not shown) for measuring the water level, and an overflow (not shown) for discharging the hot water to the outside A tube (not shown) is mounted.

The heat exchanger 160 exchanges heat between water circulated by the first pump 165 and water in the hot water reservoir 170 circulated by the second pump 175.

The firebox for a pellet hot water boiler according to the present invention having the above-described structure according to the present invention has a flame burning space 115 inside the lower sphere part 111, which is relatively inferior to the flue 32 (see FIG. 1) So that the flame of the flue can easily rise to the flame combustion space 135 and the wider flame combustion space 135 allows the flame to burn well and the circumference of the flame combustion space 135 to flow into the first and second The water jackets WJ1 and WJ2 are enclosed and the heat generated by the combustion of the flame is used to heat the low temperature water filled in the first and second water jackets WJ1 and WJ2, And the structural characteristics of the sphere of the lower sphere part 111 can withstand the high combustion pressure generated in the flame combustion, thereby increasing the service life of the hot water boiler.

The low-temperature water is supplied to the first water jacket WJ1 through the low-temperature water supply pipe SP by the pump, and the low-temperature water is supplied to the first water jacket WJ1 and the second water jacket WJ2, The heated water is heated by the flame in the course of passing through the jacket WJ2 and the heated hot water is supplied from the second water jacket WJ2 through the primary headbox 140 and the secondary headbox 145 to the reverse tank Temperature hot water is supplied from the reverse tank 150 to the heat exchanger 160 to be heat-exchanged in the heat exchanger 160 and the low temperature water discharged from the heat exchanger 160 is supplied to the second circulation pipe RP2 to the low-temperature water supply pipe SP.

As described above, in the firebox for a pellet hot water boiler according to the present invention, the hot water heated by the first and second water jackets WJ1 and WJ2 flows through the primary head box 140 and the secondary head box 145 sequentially The reverse tank 150 can prevent water hammer and sufficiently exhaust gas such as steam and air from the reverse tank 150 so that the heat exchange efficiency of the heat exchanger 160 is reduced by the gas Can be prevented from deteriorating.

3, in the firebox for a pellet hot water boiler according to the present invention, a third water jacket WJ3 and a fourth water jacket WJ4 are formed in the middle cylinder 120 and the outer cylinder 130, respectively, The lower end of the lower body part 120 and the lower body part 111 of the inner tube 110 are connected by the fourth connection pipe CP4 so that the water of the lower body part 111 is supplied to the third water jacket WJ3, The lower end 130 of the outer cylinder 130 is connected to the low temperature water supply pipe SP by the fifth connection pipe CP5 and the water of the low temperature water supply pipe SP is connected to the outer pipe 130 via the fifth connection pipe CP5 The upper end of the outer cylinder 130 and the upper end of the intermediate cylinder 120 are connected by a sixth connecting pipe CP6 and the upper end of the intermediate cylinder 120 is connected to the upper end of the intermediate cylinder 120 by a first The head box 140 is connected by the seventh connecting pipe CP7 so that when the hot water of the third water jacket WJ3 is supplied to the primary head box 140 the hot water of the fourth water jacket WJ4 And is supplied to the primary head box 140 through the third water jacket WJ3 .

Thus, the firebox for a pellet hot water boiler according to the present invention completely encloses the fourth water jacket WJ4 of the outer cylinder 130, thereby preventing the heat of the combustion gas from being radiated to the outside, The heat can be recovered to the maximum extent and the combustion gas passing through the upper cylindrical portion 112 of the inner tube 110 can be discharged to the third water jacket GP2 in the course of passing through the first gas passage GP1 and the second gas passage GP2 WJ3) are highly heat-exchanged, so that it is possible to absorb heat of high temperature contained in the combustion gas.

3, the firebox for a pellet hot water boiler according to the present invention includes a first spiral tube 180 and a second spiral tube 182 spirally wound around a first gas passage GP1 A third helical tube 184 and a fourth helical tube 186 spirally wound on the second gas passage GP2 are disposed and the first helical tube 180, And the upper end of the first to fourth helical pipes 180, 182, 184 and 186 are connected to the lower concrete part 111 of the inner tube 110 through the eighth to eleventh connection pipes CP8, CP9, CP10, CP11 to the reverse tank 150.

As a result, the combustion gas passing through the upper cylindrical portion 112 of the inner cylinder 110 passes through the first gas pipe (GP1) The third helical tube 184 and the fourth helical tube 182 can absorb a large amount of heat of the combustion gas in the first helical tube 180 and the second helical tube 182 having a large surface area, The heat of the combustion gas passing through the second gas passage GP2 is recovered by the second gas passage 186, so that the heat of the combustion gas can be minimized.

110: inner tube 120: intermediate tube
130: outer tube 140: primary headbox
145: secondary headbox 150: reverse tank
160: heat exchanger GP1: first gas passage
GP2: second gas passage WJ1: first water jacket
WJ2: Second water jacket

Claims (1)

The first gas passage GP1 and the second gas passage G1 are formed between the inner cylinder 110 and the outer cylinder 130 by the intermediate cylinder 120, GP2 are formed on the inner surface of the lower sphere part 111. The inner tube 110 is composed of the lower sphere part 111 and the upper cylindrical part 112 and the lower sphere part 111 is formed in the shape of a convex jar, And a lower end of the upper cylindrical portion 112 is connected to an upper hole of the lower solid portion 111. The lower solid portion 111 of the inner cylinder 110 and the lower cylindrical portion 112 of the upper cylindrical portion 112 are connected to each other, The first water jacket WJ1 and the second water jacket WJ2 are respectively formed on the lower portion 102 and the lower portion 102 of the lower portion 102. The first water jacket WJ1 and the second water jacket WJ2 are formed on the lower portion 102, And a low temperature water supply pipe SP is connected to the lower end of the first water jacket WJ1 and a primary head box 140 is disposed above the upper cylindrical portion 112 of the inner cylinder 110 The upper end of the upper cylindrical portion 112 is connected to the first connection pipe C A secondary head box 145 disposed on the upper portion of the primary head box 140 is disposed between the middle cylinder 120 and the outer cylinder 130, The primary head box 140 and the secondary head box 145 are connected by the second connection pipe CP2 and the reverse tank 150 is disposed on the upper portion of the outer cylinder 130 and the secondary head box 145 And the reverse tank 150 are connected by the third connection pipe CP3 and the reverse tank 150 is connected to the heat exchanger 160 by the first circulation pipe RP1 and the heat exchanger 160 Wherein a low temperature water supply pipe (SP) is connected by a second circulation pipe (RP2), and a first pump (165) is mounted on a second circulation pipe (RP2).

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