CN214469356U

CN214469356U - Full-wet back type ultralow nitrogen condensation vacuum boiler with built-in burner

Info

Publication number: CN214469356U
Application number: CN202120554705.3U
Authority: CN
Inventors: 黄学兵; 曾俊辉
Original assignee: Rosen Boiler Co ltd
Current assignee: Rosen Boiler Co ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-10-22
Anticipated expiration: 2031-03-18

Abstract

The utility model discloses a full wet back type ultralow nitrogen condensation vacuum boiler with a built-in burner, which comprises a boiler shell, a hearth, the burner, a recombustion chamber, a smoke tube, a front smoke box and a condenser; the boiler shell is internally provided with an installation space, the hearth, the combustor, the recombustion chamber, the smoke pipe, the front smoke box and the condenser are all arranged in the installation space, the combustor is positioned at the front side of the hearth and communicated with the hearth, and the recombustion chamber is positioned at the rear side of the hearth and communicated with the hearth. The utility model discloses well furnace is full wet back of the body formula following current structure with the chamber of backflowing, furnace's water-cooling degree has been improved, flame temperature in the furnace can further be reduced, more be favorable to reaching the purpose that the ultralow nitrogen discharged, and, the combustor is located the furnace front side and is located the below of preceding smoke box, thereby the length of boiler has been reduced, boiler area has been reduced, simultaneously because the combustor is arranged in boiler shell, the noise when having reduced the boiler operation, and the cooperation sets up the condenser, can effectively utilize the heat source.

Description

Full-wet back type ultralow nitrogen condensation vacuum boiler with built-in burner

Technical Field

The utility model belongs to the technical field of the boiler technique and specifically relates to indicate a full wet back of body formula ultralow nitrogen condensation vacuum boiler of built-in combustor.

Background

The vacuum boiler is a heat exchange device which transfers heat by virtue of boiling evaporation and condensation heat exchange of a heat medium so as to heat feed water. In recent years, the fuel oil and gas vacuum boiler has the advantages of small volume, high automation degree, no corrosion, no scaling and convenient installation, and is widely applied. However, in order to avoid low-temperature corrosion of the heated surface at the tail of the boiler, the exhaust temperature of the traditional vacuum boiler is usually higher than 140 ℃, which not only consumes a large amount of energy, but also increases the operation cost of the boiler, and the flue gas of the gas-fired boiler contains about 15-19% (volume) of water vapor, which is a main carrier of the heat of the flue gas. If the exhaust gas temperature of the boiler is reduced to around 100 c, the vacuum boiler efficiency is improved by about two percentage points.

At present, most shell type vacuum boilers adopt a central backfire type structure, and the lowest NOx emission can reach 80mg/m³The NOx emission below 30mg/m cannot be satisfied³The requirements of (1). Therefore, there is a need for improvements in current vacuum boilers.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to the deficiency of the prior art, and the main objective of the present invention is to provide a full-wet back type ultra-low nitrogen condensation vacuum boiler with a built-in burner, which can effectively solve the problem of high NOx emission of the existing vacuum boiler.

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

a full wet-back type ultralow nitrogen condensation vacuum boiler with a built-in burner comprises a boiler shell, a hearth, the burner, a recombustion chamber, a smoke pipe, a front smoke box and a condenser; have an installation space in this boiler shell, this furnace, the combustor, the chamber of backflowing, the tobacco pipe, preceding smoke box and condenser all set up in installation space, this combustor is located furnace's front side and feed through furnace, this chamber of backflowing is located furnace's rear side and feed through furnace, this furnace and the chamber of backflowing are full wet back of the body formula following current structure, this tobacco pipe is located furnace's top, the one end of tobacco pipe feeds through the chamber of backflowing, this preceding smoke box is located the top of combustor, the other end of preceding smoke box intercommunication tobacco pipe, this condenser is located the top of preceding smoke box and feeds through preceding smoke box.

Preferably, the condenser has a smoke outlet extending upwardly out of the top of the boiler housing.

Preferably, a gas condensation chamber and a transducer are arranged in the boiler shell, the gas condensation chamber is positioned right above the smoke tube, the condenser is positioned on the front side of the gas condensation chamber, and the transducer is positioned on the rear side of the gas condensation chamber and communicated with the gas condensation chamber.

Preferably, the front smoke box is provided with an FGR smoke taking port which is communicated with the burner.

Preferably, the contact part of the front smoke box and the smoke is coated with an anticorrosive coating layer.

Preferably, the condenser adopts a spiral finned tube.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme:

the utility model discloses well furnace is full wet back of the body formula following current structure with the chamber of backflowing, furnace's water-cooling degree has been improved, flame temperature in the furnace can further be reduced, more be favorable to reaching the purpose that the ultralow nitrogen discharged, and, the combustor is located the furnace front side and is located the below of preceding smoke box, thereby the length of boiler has been reduced, boiler area has been reduced, simultaneously because the combustor is arranged in boiler shell, the noise when having reduced the boiler operation, and the cooperation sets up the condenser, can effectively utilize the heat source.

To more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments:

drawings

FIG. 1 is a schematic cross-sectional view of a preferred embodiment of the present invention;

FIG. 2 is a side view of the preferred embodiment of the present invention;

fig. 3 is a longitudinal sectional view of the preferred embodiment of the present invention.

The attached drawings indicate the following:

10. boiler shell 11, installation space

21. Hearth 22 and burner

23. The flashback chamber 24, the smoke tube

25. Front smoke box 251, FGR smoke taking port

252. Anticorrosive paint layer 26 and condenser

261. Exhaust port 262 and spiral finned tube

27. Condensation chamber 28, transducer

Detailed Description

Referring to fig. 1 to 3, the specific structure of the preferred embodiment of the present invention is shown, which includes a boiler housing 10, a furnace 21, a burner 22, a flashback chamber 23, a smoke tube 24, a front smoke box 25 and a condenser 26.

The boiler shell 10 is internally provided with an installation space 11, the hearth 21, the burner 22, the recombustion chamber 23, the smoke pipe 24, the front smoke box 25 and the condenser 26 are all arranged in the installation space 11, the burner 22 is positioned at the front side of the hearth 21 and communicated with the hearth 21, the burner 22 is arranged in the boiler shell 10 to reduce the occupied area of the boiler and reduce the noise of the boiler during operation, the recombustion chamber 23 is positioned at the rear side of the hearth 21 and communicated with the hearth 21, the hearth 21 and the recombustion chamber 23 are of full-wet-back type downstream structure and are particularly suitable for ultra-low nitrogen diffusion type ultra-low nitrogen combustion, the smoke pipe 24 is positioned above the hearth 21, one end of the smoke pipe 24 is communicated with the recombustion chamber 23, the convection heating surface of the smoke pipe 24 adopts a heat transfer enhancing measure which is provided with a screwed smoke pipe and a flow disturbing sheet, each heat transfer enhancing measure can be used in combination, the front smoke box 25 is positioned above the burner 22, the front smoke box 25 is communicated with the other end of the smoke pipe 24, the condenser 26 is located above the front smoke box 25 and communicates with the front smoke box 25.

In the embodiment, the front smoke box 25 has a FGR smoke taking port 251, the FGR smoke taking port 251 is communicated with the burner 22 to participate in the combustion process, the FGR smoke taking port 251 is communicated with the burner 22 through a FGR smoke recycling connection pipe, the FGR smoke recycling connection pipe is arranged on the panel of the front smoke box 25 at the front part of the boiler, the length of a recycling smoke pipeline is greatly reduced, the flow resistance of the recycling smoke is reduced, the requirement of the recycling smoke quantity can be met under the condition of consuming less energy, and the requirement that the NOx is lower than 30mg/m is met³And on the emission requirement, the contact part of the front smoke box 25 and the smoke is coated with an anticorrosive coating layer 252. The condenser 26 has a discharge port 261, the discharge port 261 protrudes upward from the top of the boiler casing 10, and the condenser 26 employs a turn-fin tube 262.

And a gas condensation chamber 27 and a transducer 28 are arranged in the boiler shell 10, the gas condensation chamber 27 is positioned right above the smoke pipe 24, the condenser 26 is positioned at the front side of the gas condensation chamber 27, and the transducer 28 is positioned at the rear side of the gas condensation chamber 27 and communicated with the gas condensation chamber 27.

Detailed description the working principle of the present embodiment is as follows:

during operation, after the combustion of the high-temperature flue gas in the furnace 21 is completed, the high-temperature flue gas passes through the convection heating surface of the combustion chamber 23 and the flue pipe 24, enters the front flue gas box 25, then enters the condenser 26, and finally the temperature of the high-temperature flue gas is reduced to the minimum and is discharged from the smoke outlet 261, and the flue gas after the combustion always flows along the furnace 21, the combustion chamber 23 and the flue pipe 24 in sequence without backflow phenomenon in the same element.

The utility model discloses a design key is: the utility model discloses well furnace is full wet back of the body formula following current structure with the chamber of backflowing, furnace's water-cooling degree has been improved, flame temperature in the furnace can further be reduced, more be favorable to reaching the purpose that the ultralow nitrogen discharged, and, the combustor is located the furnace front side and is located the below of preceding smoke box, thereby the length of boiler has been reduced, boiler area has been reduced, simultaneously because the combustor is arranged in boiler shell, the noise when having reduced the boiler operation, and the cooperation sets up the condenser, can effectively utilize the heat source.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. The utility model provides a full wet back of body formula ultralow nitrogen condensation vacuum boiler of built-in combustor which characterized in that: comprises a boiler shell, a hearth, a burner, a recombustion chamber, a smoke pipe, a front smoke box and a condenser; have an installation space in this boiler shell, this furnace, the combustor, the chamber of backflowing, the tobacco pipe, preceding smoke box and condenser all set up in installation space, this combustor is located furnace's front side and feed through furnace, this chamber of backflowing is located furnace's rear side and feed through furnace, this furnace and the chamber of backflowing are full wet back of the body formula following current structure, this tobacco pipe is located furnace's top, the one end of tobacco pipe feeds through the chamber of backflowing, this preceding smoke box is located the top of combustor, the other end of preceding smoke box intercommunication tobacco pipe, this condenser is located the top of preceding smoke box and feeds through preceding smoke box.

2. The full wet back type ultra-low nitrogen condensing vacuum boiler with built-in burner as claimed in claim 1, characterized in that: the condenser has a smoke outlet that extends upwardly out of the top of the boiler shell.

3. The full wet back type ultra-low nitrogen condensing vacuum boiler with built-in burner as claimed in claim 1, characterized in that: the boiler is characterized in that a gas condensation chamber and a transducer are arranged in the boiler shell, the gas condensation chamber is located right above the smoke tube, the condenser is located on the front side of the gas condensation chamber, and the transducer is located on the rear side of the gas condensation chamber and communicated with the gas condensation chamber.

4. The full wet back type ultra-low nitrogen condensing vacuum boiler with built-in burner as claimed in claim 1, characterized in that: the front smoke box is provided with an FGR smoke taking port which is communicated with the burner.

5. The full wet back type ultra-low nitrogen condensing vacuum boiler with built-in burner as claimed in claim 1, characterized in that: and the contact part of the front smoke box and the smoke is coated with an anticorrosive coating layer.

6. The full wet back type ultra-low nitrogen condensing vacuum boiler with built-in burner as claimed in claim 1, characterized in that: the condenser adopts a spiral finned tube.