CN208205406U - A kind of burning energy-saving boiler - Google Patents

Abstract

The utility model discloses a gas-fired energy-saving boiler, which comprises: a furnace body, a flue gas outlet is arranged on the side wall, a combustion chamber is arranged inside, and an inner tube group and an outer tube group are arranged around the outer periphery of the combustion chamber. The inner tube group and the outer tube group are arranged at intervals inside and outside to form a first gap, and the smoke in the combustion chamber passes through the first gap and is discharged from the flue gas outlet; the waste heat recovery device includes a The smoke inlet of the gas outlet is connected with a heat exchange box, and a heat exchange tube is arranged in the heat exchange box. Compared with the prior art, the utility model can fully absorb the heat carried by the flue gas in the combustion process through the inner tube group, the outer tube group and the waste heat recovery device in the furnace body, reduce heat loss, and effectively improve the heating capacity of the boiler. Efficacy, save energy.

Description

A gas-fired energy-saving boiler

technical field

The utility model relates to gas heating equipment, in particular to a gas energy-saving boiler.

Background technique

A gas boiler is a heating device that uses gas as the source material. The existing gas boilers are generally set as: a gas nozzle, and an air nozzle is set near the gas nozzle. The gas and air enter the combustion chamber together, and in the combustion chamber Mix and burn. The existing technology has the following defects and deficiencies due to the structural setting: 1. Because the gas is not fully mixed with the air, the combustion is insufficient, resulting in waste of resources; 2. The temperature around the flame port is high, and because there is no cooling system, after long-term use, It is easy to burn out, resulting in a short service life. Therefore, there is a large room for improvement in the current technology.

For this reason, the Chinese invention patent CN104132341B discloses a gas boiler burner, including a boiler body and a burner body. The boiler body includes a boiler shell, and a heating chamber is formed in the boiler shell. It communicates with the heating chamber; the burner body includes a burner housing, the upper part of the burner housing is provided with a cylinder, the lower part of the burner housing is formed with a first mixing chamber, the upper part of the cylinder is a combustion chamber, and the lower part of the cylinder is a second mixing chamber. The combustion chamber communicates with the heating chamber, and the combustion chamber is provided with a combustion plate with several combustion holes, and several air passages are provided inside or outside the cylinder, and the first mixing chamber is connected with a gas pipe and an air booster device; the burner shell The body and the boiler shell are connected to each other. It has the characteristics of reasonable structure, long service life, and more complete combustion. However, in this scheme, the discharge port is directly connected to the heating chamber, and the smoke generated by combustion will carry a large amount of heat and be directly discharged from the heating chamber, which will cause a large amount of heat loss. Boiler heating efficiency is low.

In view of this, there is an urgent need to improve the existing gas-fired boilers so that they can use the combustion heat more efficiently, reduce heat loss, and improve heating efficiency.

Utility model content

The technical problem to be solved by the utility model is that the existing gas-fired boiler cannot efficiently utilize the combustion heat, the heat loss is large, and the heating efficiency is low.

In order to solve the above technical problems, the technical solution adopted by the utility model is to provide a gas-fired energy-saving boiler, including:

The furnace body has a flue gas outlet on the side wall, and a combustion chamber inside, and an inner tube group and an outer tube group are arranged around the outer periphery of the combustion chamber, and the inner tube group and the outer tube group are arranged at intervals inside and outside, And form a first gap, the flue gas in the combustion chamber passes through the first gap and is discharged from the flue gas outlet;

The waste heat recovery device includes a smoke inlet connected to the flue gas outlet, the smoke inlet is connected to a heat exchange box, and a heat exchange tube is arranged in the heat exchange box.

In the above solution, the heat exchange box is provided with a water inlet and a water outlet communicating with the heat exchange tube.

In the above solution, the outer peripheral surface of the heat exchange tube is provided with a heat conduction sheet, and the heat conduction sheet is in the shape of a twisted sheet, and the heat conduction sheets are arranged in several spiral arrangements, and the adjacent heat conduction sheets Bottom fits snugly.

In the solution above, heat absorbing fins are provided on the inner tube set and the outer tube set, and the heat absorbing fins are located in the first gap.

In the above solution, the inner tube group includes several inner heat exchange tubes, the outer tube group includes several outer heat exchange tubes, internal baffles are arranged between the inner heat exchange tubes, and the outer heat exchange tubes An outer baffle is provided between them, the lower part of the inner baffle is provided with a first port for communicating the first gap with the combustion chamber, and the upper part of the outer baffle is provided with a port for connecting the first gap to the combustion chamber. The gap communicates with the second port of the flue gas outlet.

In the above solution, a second gap is formed between the outer tube group and the inner wall of the furnace body, and the second gap communicates with the second port and the flue gas outlet.

In the above solution, a smoke exhaust port is provided at the bottom of the heat exchange box, and the smoke exhaust port is connected with a smoke exhaust channel, and a centrifugal fan is provided in the smoke exhaust channel.

In the above solution, the furnace body is provided with an air inlet communicating with the combustion chamber.

In the above solution, the smoke inlet communicates with the heat exchange box through a smoke inlet channel, and the outer circumference of the smoke inlet channel and the heat exchange box are covered with thermal insulation cotton.

In the above solution, the flue gas outlet is arranged at the middle or bottom of the furnace body.

Compared with the prior art, the utility model can fully absorb the heat carried by the flue gas in the combustion process through the inner tube group, the outer tube group and the waste heat recovery device in the furnace body, reduce heat loss, and effectively improve the heating capacity of the boiler. Efficacy, save energy.

Description of drawings

Fig. 1 is the longitudinal sectional view of body of heater among the utility model;

Fig. 2 is the structural representation of waste heat recovery device in the utility model;

Fig. 3 is a structural schematic diagram of the heat exchange tube in the present invention.

Detailed ways

The utility model provides a gas-fired energy-saving boiler, which can fully absorb the heat carried by the flue gas in the combustion process through the inner tube group, the outer tube group and the waste heat recovery device in the furnace body, reduce heat loss, and effectively improve the heat supply of the boiler. Efficacy, saving energy. The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments of the description.

As shown in Figures 1 to 3, the utility model provides a gas-fired energy-saving boiler, which includes a furnace body and a waste heat recovery device. The fuel is burned in the furnace body to directly provide heat for the heat exchange between the inner tube group and the outer tube group in the furnace body. The heat carried by the flue gas in the furnace body is absorbed twice successively by the furnace body and the waste heat recovery device, so that the double absorption of heat in the flue gas can be realized, the heat loss is small, and the heating efficiency is high.

The side wall of the furnace body is provided with a flue gas outlet 15, and the interior is provided with a combustion chamber 13. The periphery of the combustion chamber 13 is surrounded by an inner tube group and an outer tube group. A first gap 16 is formed between them, and the flue gas 14 in the combustion chamber 13 passes through the first gap 16 and is discharged from the flue gas outlet 15 . Both the inner tube group and the outer tube group are provided with heat-absorbing fins 17, and the heat-absorbing fins 17 are located in the first gap 16. When the smoke 14 passes through the first gap 16, the heat-absorbing fins 17 can absorb smoke. The heat of the gas 14 is transferred to the inner tube group and the outer tube group to improve the heat exchange efficiency. Preferably, an air inlet connected to the combustion chamber 13 is provided on the furnace body, and an air inlet valve is arranged in the air inlet.

The inner tube group includes a number of inner heat exchange tubes 11, the outer tube group includes a number of outer heat exchange tubes 10, the inner heat exchange tubes 11 are provided with inner baffles, and the outer heat exchange tubes 10 are provided with outer baffles. The baffle and the outer baffle can isolate the combustion chamber 13 from the first gap 16 to avoid gas leakage. the first port. The upper part of the outer baffle is provided with a second port for communicating the first gap 16 with the flue gas outlet 15. The flue gas in the combustion chamber 13 enters the first gap 16 through the first port, and is discharged out of the furnace through the flue gas outlet 15. body. In the present utility model, a second gap is formed between the outer tube group and the inner wall of the furnace body, and the second gap communicates with the second port and the flue gas outlet 15, so that the flue gas 14 can enter the second gap through the second port, In the second gap, heat can be exchanged with the outer tube group, and then discharged from the flue gas outlet 15, which can further absorb the heat in the flue gas and effectively improve the efficiency of the boiler.

Preferably, the flue gas outlet 15 is arranged at the middle or bottom of the furnace body, so that the flue gas 14 can fully contact with the outer tube group. The fuel nozzle is arranged on the top of the combustion chamber 13, the fuel nozzle is arranged downwards, and the fuel is ejected downwards, and a flame 12 is formed on the top of the combustion chamber 13. Most of the heat generated by the flame 12 is absorbed by the inner tube group, and the inner heat exchange tubes 11 and The outer heat exchange tube 10 is provided with a heat exchange medium.

The waste heat recovery device includes a smoke inlet 20 connected to the flue gas outlet 15 , the smoke inlet 20 is connected to a heat exchange box 22 , and a heat exchange pipe 30 is arranged inside the heat exchange box 22 . The heat exchange box 22 is provided with a water inlet and a water outlet connected to the heat exchange pipe 30 . The smoke inlet 20 communicates with the heat exchange box 22 through the smoke inlet channel, and the outer circumference of the smoke inlet channel and the heat exchange box 22 is covered with thermal insulation cotton for reducing heat loss. The bottom of the heat exchange box 22 is provided with a smoke exhaust port, and the smoke exhaust port is connected with a smoke exhaust channel 24 . Preferably, the bottom of the heat exchange box 22 is provided with a bracket 23, the heat exchange box 22 is provided with a door 21 with a handle, the smoke inlet channel is arranged on the top of the heat exchange box 22, and the smoke exhaust channel 24 is arranged at the top At the bottom, a centrifugal fan 25 is arranged in the exhaust passage 24 . Centrifugal blower 25 is connected with the chimney 26 that makes flue gas discharge.

A number of heat conduction fins 31 are arranged on the outer peripheral surface of the heat exchange tube 30. The heat conduction fins 31 are in the shape of spikes or twisted sheets. When the heat conduction fins 31 are in the shape of spikes, they can be arranged in a spiral or evenly distributed. In the case of a twisted thin sheet, it is arranged in a spiral, and the width direction of the heat conduction fins 31 is perpendicular to the axial direction of the heat exchange tube 30, and the lower parts of the adjacent heat conduction fins 31 are closely attached, and the heat conduction fins 31 are formed by twisting to one side. Opening, the opening direction of all the heat conduction fins 31 is consistent, so the flow of flue gas in the heat exchange box 22 can be controlled through the heat conduction fins 31, the contact area and time between the flue gas and the heat conduction fins 31 can be increased, and the space occupied by the heat conduction fins 31 can be reduced at the same time , thereby improving the heat exchange efficiency.

Compared with the prior art, the utility model can fully absorb the heat carried by the flue gas in the combustion process through the inner tube group, the outer tube group and the waste heat recovery device in the furnace body, reduce heat loss, and effectively improve the heating capacity of the boiler. Efficacy, save energy.

The utility model is not limited to the above-mentioned best implementation mode, and anyone should know that the structural changes made under the inspiration of the utility model, and any technical solutions that are the same as or similar to the utility model, all fall into the scope of the utility model. within the scope of protection.

Claims (10)

1. A gas-fired energy-saving boiler, characterized in that it comprises: The furnace body has a flue gas outlet on the side wall, and a combustion chamber inside, and an inner tube group and an outer tube group are arranged around the outer periphery of the combustion chamber, and the inner tube group and the outer tube group are arranged at intervals inside and outside, And form a first gap, the flue gas in the combustion chamber passes through the first gap and is discharged from the flue gas outlet; The waste heat recovery device includes a smoke inlet connected to the flue gas outlet, the smoke inlet is connected to a heat exchange box, and a heat exchange tube is arranged in the heat exchange box. 2. A gas-fired energy-saving boiler according to claim 1, characterized in that, the heat exchange box is provided with a water inlet and a drain communicating with the heat exchange tube. 3. A gas-fired energy-saving boiler according to claim 1, characterized in that, the outer peripheral surface of the heat exchange tube is provided with a heat conduction sheet, the heat conduction sheet is in the shape of a twisted sheet, and the heat conduction sheet is arranged in several , and arranged in a spiral, the lower parts of the adjacent heat conduction sheets are closely attached. 4. A gas-fired energy-saving boiler according to claim 1, characterized in that, heat-absorbing fins are provided on the inner tube group and the outer tube group, and the heat-absorbing fins are located on the first within the gap. 5. A gas-fired energy-saving boiler according to claim 1, characterized in that, the inner tube group includes several inner heat exchange tubes, the outer tube group includes several outer heat exchange tubes, and the inner heat exchange tubes An inner baffle is provided between the outer heat exchange tubes, and an outer baffle is provided between the outer heat exchange tubes. The lower part of the inner baffle is provided with a first port for communicating the first gap with the combustion chamber. The upper part of the outer baffle is provided with a second port for communicating the first gap with the smoke outlet. 6. A gas-fired energy-saving boiler according to claim 5, wherein a second gap is formed between the outer tube group and the inner wall of the furnace body, and the second gap communicates with the second port and the flue gas outlet. 7. A gas-fired energy-saving boiler according to claim 1, characterized in that, the bottom of the heat exchange box is provided with a smoke exhaust port, and the smoke exhaust port is connected with a smoke exhaust channel, and the smoke exhaust channel is provided with a There are centrifugal fans. 8. The gas-fired energy-saving boiler according to claim 1, wherein an air inlet connected to the combustion chamber is provided on the furnace body. 9. A gas-fired energy-saving boiler according to claim 1, wherein the smoke inlet communicates with the heat exchange box through a smoke inlet passage, and the outer circumference of the smoke inlet passage and the heat exchange box is covered with Insulation cotton. 10. A gas-fired energy-saving boiler according to claim 1, characterized in that the flue gas outlet is arranged at the middle or bottom of the furnace body.