CN213421438U - Hot water boiler - Google Patents

Abstract

The utility model relates to a boiler field, especially a hot water boiler, include: the coal powder burner comprises a hearth and a coal powder burner, wherein a plurality of water cooling walls arranged in the gravity direction are arranged in the hearth, the hearth is divided into a plurality of combustion chambers by the plurality of water cooling walls, and the coal powder burner is positioned in the combustion chambers. The utility model discloses a hot water boiler because be equipped with the water-cooling wall in a plurality of that the direction of gravity set up in the furnace, a plurality of water-cooling wall separates into a plurality of combustion chambers with furnace, and the pulverized coal burner is located the combustion chamber. The height of the hearth is reduced, and the material of the hearth is saved.

Description

Hot water boiler

Technical Field

The utility model relates to a boiler field, especially a hot water boiler.

Background

A boiler is a device that heats water using heat energy released by combustion of a medium to generate steam or hot water of prescribed parameters (temperature, pressure). Compared with the traditional coal-fired heat supply, the hot water boiler is a novel urban heat supply mode, and can realize environment-friendly, energy-saving, safe, stable and automatic control operation. For the natural gas, pulverized coal boiler heat supply cost is lower, and the operation is economic, is favorable to maintaining the heat supply enterprise interests, prevents the operation loss, reduces because of the expenditure burden that the heat supply price rose and bring.

Fig. 1 is a schematic view showing a structure of a first prior art hot water boiler. Referring to fig. 1, patent publication No. CN 205090598U discloses a hot water boiler with a vertical water-fire tube structure, which includes a furnace 2, a transition flue 8, a convection heat exchange surface 9, and an economizer 13, wherein the top of the furnace 2 is provided with a burner 1, the peripheral wall of the furnace 2 is a water-cooled wall 2.1, a lower header 2.3 is arranged below the water-cooled wall 2.1, and an upper header 2.2 is arranged above the water-cooled wall (2.1); an explosion door 3 is arranged on the side surface of the hearth 2, and an ash falling hopper 4 for collecting combustion ash is arranged at the bottom of the hearth 2; the convection heat exchange surface 9 is composed of a boiler barrel 9.1, an upper tube plate 9.2, a lower tube plate 9.5, a smoke tube 9.4 and a water inlet 9.3, the lower tube plate 9.5 is in butt joint with the smoke of the transition flue 8, the peripheral wall of the transition flue 8 is provided with a water-cooling tube, the water-cooling tube is collected in the annular header 5, the annular header 5 is further communicated with the lower header 2.2 through a connecting tube 12, the top of the convection heat exchange surface 9 is provided with a turning flue 10, and the economizer 13 is connected at the rear end of the turning flue 10. This coal-fired powder boiler of vertical water and fire tube structure adopts the serial-type rivers form, obtains the high temperature hot water of stable temperature, and the thermal efficiency is high, simple structure, and convenient to popularize and apply.

Fig. 2 is a schematic view showing a structure of a second prior art hot water boiler. Referring to fig. 2, patent publication No. CN 203148019U discloses a high-efficiency pulverized coal gasification and pulverized coal composite combustion hot water boiler, which comprises an air blower 1, a pulverized coal bunker 2, a pulverized coal conveying pipeline 3, a burner 4, a gasification chamber 5, a hearth 6, a horizontal flue 7, a tail vertical shaft 8 and a boiler support 9, wherein the air blower 1 is connected with the pulverized coal bunker 2 and is connected with the gasification chamber 5 through the pulverized coal conveying pipeline 3; the burner 4 is arranged on the gasification chamber 5; the gasification chamber 5, the hearth 6, the horizontal flue 7 and the tail vertical shaft 8 are sequentially connected and are arranged on a boiler support 9 to form an n-shaped structure; the unburned belt 60 is arranged above the connection part of the hearth 6 and the gasification chamber 5, a jet air inlet 61 and a secondary air inlet 62 are arranged at the bottom of the hearth 6, and a tertiary air inlet 63 is arranged at the outlet of the unburned belt 60; a heater 71 is arranged in the horizontal flue 7; in the rear shaft 8 are arranged a convection bank 81, an economizer 82 and an air preheater 83.

The existing hot water boiler is a chamber-fired boiler, adopts a single-hearth structure, and has the advantages that the boiler hearth height and the hearth length-width ratio are large through long-term observation of an applicant. The height of the boiler chamber of the hot water boiler needs to consume a large amount of steel, heat insulation materials and the like for the structure of the side wall of the boiler chamber in the height direction, and the construction cost of the boiler room is increased along with the height of the boiler chamber. Meanwhile, the water-cooled wall is arranged around the hearth, the water-cooled wall can only receive ideal heat radiation to one side in the hearth, and the length of the water-cooled wall is long.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hot water boiler, the steel, the insulation material of consumption still less.

In order to achieve the above advantages, the utility model provides a hot water boiler, it includes: the coal powder burner comprises a hearth and a coal powder burner, wherein a plurality of water cooling walls arranged in the gravity direction are arranged in the hearth, the hearth is divided into a plurality of combustion chambers by the plurality of water cooling walls, and the coal powder burner is positioned in the combustion chambers.

In an embodiment of the hot water boiler of the present invention, the plurality of combustion chambers communicate with each other.

In an embodiment of the hot water boiler of the present invention, the intermediate water wall is a double-sided exposure water wall.

In an embodiment of the hot water boiler of the present invention, the hot water boiler further comprises a convection heating surface, and the top of the convection heating surface is communicated with the smoke outlet of the furnace chamber.

In an embodiment of the hot water boiler of the present invention, the hot water boiler further comprises a tail heating surface, and the tail heating surface is communicated with the bottom of the convection heating surface.

In one embodiment of the hot water boiler of the present invention, the burner is located at the bottom of the combustion chamber.

In one embodiment of the hot water boiler of the present invention, the burner is located at a bottom center position of the combustion chamber.

In one embodiment of the hot water boiler of the present invention, the intermediate water-cooled wall comprises a tube, and the tube is U-shaped.

In an embodiment of the hot water boiler of the present invention, the recycled water wall is a light pipe water wall or a membrane water wall.

In an embodiment of the hot water boiler of the present invention, the furnace is provided with water walls around the furnace, and the water walls around the furnace are used for cooling the furnace.

The utility model discloses a hot water boiler because be equipped with the water-cooling wall in a plurality of that the direction of gravity set up in the furnace, a plurality of water-cooling wall separates into a plurality of combustion chambers with furnace, and the pulverized coal burner is located the combustion chamber. The heat exchange area is greatly increased by adding the reclaimed water cooling wall, so that the height of the hearth is reduced, and the material of the hearth is saved.

Drawings

Fig. 1 is a schematic view showing a structure of a first prior art hot water boiler.

Fig. 2 is a schematic view showing a structure of a second prior art hot water boiler.

Fig. 3 is a schematic structural view of a hot water boiler according to a first embodiment of the present invention.

Fig. 4 is a schematic view showing another direction of the hot water boiler of fig. 3.

Fig. 5 is a schematic view showing the construction of a reclaimed water-cooled wall of the hot water boiler of fig. 3.

Fig. 6 is a schematic view showing the structure of a water wall of the hot water boiler of fig. 3.

Fig. 7 is a sectional view of a hot water boiler according to a second embodiment of the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the present invention, the following detailed description will be given with reference to the accompanying drawings and preferred embodiments in order to provide the best mode, structure, features and effects according to the present invention.

Fig. 3 is a schematic structural view of a boiler according to a first embodiment of the present invention. Fig. 4 is a schematic view showing another direction of the hot water boiler of fig. 3. Referring to fig. 3 and 4, the hot water boiler of the present embodiment includes a burner 1, a left boiler combustion chamber 2, a right boiler combustion chamber 3, a middle water-cooled wall 4, a convection heating surface 5, and a tail heating surface 6. The burner is preferably a pulverized coal burner, but a burner using natural gas, biomass gas, raw coke oven gas, biomass fuel, fuel oil and other fuels can also be used as the burner.

The number of the burners 1 is two, the burners 1 are positioned at the bottoms of the left boiler combustion chamber 2 and the right boiler combustion chamber 3, the left boiler combustion chamber 2 and the right boiler combustion chamber 3 are formed by separating a middle water-cooled wall 4, and the left boiler combustion chamber 2 and the right boiler combustion chamber 3 are communicated with each other. The convection heating surface 5 is communicated with the left combustion chamber 2 and the right combustion chamber 3 of the boiler, and the tail heating surface 6 is communicated with the convection heating surface 5.

Combustor 1 is the pulverized coal burner, and combustor 1 is located the bottom of boiler left side combustion chamber 2 and boiler right side combustion chamber 3, and combustor 1 sets up the bottom central point who puts at boiler left side combustion chamber 2 and boiler right side combustion chamber 3 the utility model discloses a middle part or the top of combustion chamber can be located to combustor 1 in other embodiments, and the quantity of combustor 1 in each combustion chamber also can be a plurality ofly.

The boiler left combustion chamber 2 and the boiler right combustion chamber 3 are arranged in the middle of the hearth through the middle water-cooled wall 4, and the hearth is divided into the boiler left combustion chamber 2 and the boiler right combustion chamber 3.

Fig. 5 is a schematic view showing the construction of the reclaimed water-cooled wall of the hot water boiler of fig. 3. Referring to fig. 5, the middle water-cooled wall 4 is a light pipe type water-cooled wall or a membrane type water-cooled wall, the tubes 31 in the middle water-cooled wall 4 are U-shaped, and the rigidity of the U-shaped tubes 31 is better than that of L-shaped and one-shaped tubes with the same length. The reclaimed water-cooled wall 4 is a double-sided exposure water-cooled wall, namely the reclaimed water-cooled wall 4 is a water-cooled wall with double sides absorbing radiant heat. The middle water-cooled wall 4 is arranged in the direction of gravity G.

The convection heating surface 5 is arranged at the rear parts of the left combustion chamber 2 and the right combustion chamber 3 of the boiler, the top of the convection heating surface 5 is communicated with the smoke outlets of the left combustion chamber 2 and the right combustion chamber 3 of the boiler, and the bottom of the convection heating surface 5 is communicated with the tail heating surface 6.

Fig. 6 is a schematic view showing the structure of a water wall of the hot water boiler of fig. 3. Referring to fig. 6, water-cooled walls may be disposed around the furnace chamber, and when the temperature of the furnace chamber is high, the water-cooled walls around the furnace chamber cool the furnace chamber so that the furnace chamber is not damaged by high temperature. The water-cooled wall and the reclaimed water-cooled wall 4 around the hearth can be fixed by welding.

Fig. 7 is a sectional view of a hot water boiler according to a second embodiment of the present invention. The structure and principle of the hot water boiler of the present embodiment are similar to those of the first embodiment, and the differences are that:

in the hot water boiler of the embodiment, a hearth is divided into 4 combustion chambers 9 by the middle water-cooling walls 4 which are intersected with each other, and each combustion chamber is internally provided with a pulverized coal burner 1.

The structure and principle of other parts of the hot water boiler of this embodiment are the same as those of the hot water boiler of the first embodiment, and are not repeated herein.

In other embodiments of the present invention, the tubes of the waterwall may be other shapes, such as a straight shape, an L shape.

To sum up, the utility model discloses a hot water boiler has following advantage at least:

the utility model discloses a hot water boiler because be equipped with the water-cooling wall in a plurality of that the direction of gravity set up in the furnace, a plurality of water-cooling wall separates into a plurality of combustion chambers with furnace, and the pulverized coal burner is located the combustion chamber. The height of the hearth is reduced, and the material of the hearth is saved.

In an embodiment of the hot water boiler of the present invention, the middle water wall is a double-sided exposure water wall, and is subjected to both radiant heat from the left combustion chamber and radiant heat from the right combustion chamber of the boiler. The same radiation heating surface is needed, and the steel consumption is reduced by 20 percent.

In one embodiment of the hot water boiler of the utility model, the boiler is arranged into a structure of a left boiler combustion chamber and a right boiler combustion chamber, so that the volume heat load of the hearth can be improved, and the height of the hearth can be reduced by 1/3; more than 30% of materials for boiler steel frame construction, furnace building and heat preservation, external wrapping and the like are saved. Meanwhile, the total building height of the boiler room is reduced, so that the building cost and the installation cost are reduced.

In one embodiment of the hot water boiler of the utility model, the boiler is arranged into a structure of a left combustion chamber and a right combustion chamber of the boiler, so that the height of each water-cooled wall of a hearth can be reduced; the length of the water-cooled wall is shortened, the self rigidity is effectively improved, and the number of rigid beams is reduced.

The utility model discloses an in an embodiment of boiler, adopt well water-cooling wall in the middle of boiler left combustion chamber and the boiler right combustion chamber, reduce vertical length, the rigidity of water-cooling wall tube bank in the middle of the reinforcing to improve boiler security.

The utility model discloses an in an embodiment of boiler, adopt well water-cooling wall in the middle of the left combustion chamber of boiler and the right combustion chamber of boiler, can reduce furnace temperature, prevent the furnace coking, reduce boiler trouble, improve the stability of burning, extension boiler life.

The utility model discloses an in an embodiment of boiler, adopt well water-cooling wall in the middle of boiler left combustion chamber and the boiler right combustion chamber, certain mixing space is all left to well water-cooling wall upper portion, lower part and front portion, reduces the pressure deviation in boiler left combustion chamber and the boiler right combustion chamber, improves boiler operating stability.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person can make modifications or changes equivalent to the above embodiments without departing from the scope of the present invention, but all the modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are within the scope of the present invention.

Claims (10)

1. A hot water boiler, comprising: furnace and combustor (1), its characterized in that, be equipped with in the furnace a plurality of normal water-cooling wall (4) that the direction of gravity set up (G), a plurality of normal water-cooling wall (4) will a plurality of combustion chamber (2, 3, 9) are separated into to the furnace, combustor (1) is located in combustion chamber (2, 3, 9).

2. The hot water boiler according to claim 1, wherein: a plurality of combustion chambers (2, 3, 9) are communicated with each other.

3. The hot water boiler according to claim 1, wherein: the reclaimed water cooling wall (4) is a double-sided exposure water cooling wall.

4. The hot water boiler according to claim 1, wherein: the hot water boiler further comprises a convection heating surface (5), and the top of the convection heating surface (5) is communicated with the smoke outlet of the hearth.

5. The hot water boiler according to claim 4, wherein: the hot water boiler further comprises a tail heating surface (6), and the tail heating surface (6) is communicated with the bottom of the convection heating surface (5).

6. The hot water boiler according to claim 1, wherein: the combustor (1) is positioned at the bottom of the combustion chambers (2, 3 and 9), and is a pulverized coal combustor.

7. The hot water boiler according to claim 1, wherein: the burner (1) is positioned at the bottom center of the combustion chamber (2, 3, 9).

8. The hot water boiler according to claim 1, wherein: the intermediate water-cooling wall (4) comprises a plurality of tubes, and the tubes are U-shaped.

9. The hot water boiler according to claim 1, wherein: the reclaimed water cooling wall (4) is a light pipe type water cooling wall or a membrane type water cooling wall.

10. The hot water boiler according to claim 1, wherein: and water cooling walls are arranged around the hearth and used for cooling the hearth.

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