Gas furnace double-burner arrangement structure

Abstract

The utility model relates to a double-burner arrangement structure of a gas furnace, which comprises a hearth communicated with a vertical shaft flue. A combustor group is mounted in the hearth; the bottom of the hearth is a hearth inlet, and the top of the hearth is a smoke outlet which is communicated with a shaft flue; the combustor group comprises a main combustor and an auxiliary combustor; the main combustor is located below the auxiliary combustor, and the hearth is of a membrane wall structure. The hearth comprises a water cooling wall, the water cooling wall is composed of a plurality of heating pipes, and the hearth is composed of a front wall water cooling wall, a rear wall water cooling wall and a side wall water cooling wall. According to the structure, the problem of low-load operation of the boiler is solved, the combustion efficiency is improved, and incomplete combustion loss is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of boilers and relates to a double-burner arrangement structure of a gas furnace. Background Art

[0002] At present, the demand for steam in some production enterprises fluctuates greatly. Sometimes the demand for steam reaches dozens of tons during the day, but only a few tons at night. This has a great impact on the combustion stability of the boiler. The burner with good low-load stability can generally only ensure stable combustion when the boiler load is above 10%, and the combustion efficiency is very low at this time, and the loss of incomplete combustion is large. In addition, when the load is too low, the superheated steam temperature is low, which may not meet the production requirements, and the exhaust gas temperature will also be low, causing low-temperature corrosion of the air preheater.

[0003] In order to solve the above problems, a new type of double burner arrangement structure of a small capacity gas furnace is invented. Summary of the invention

[0004] The utility model aims to provide a double-burner arrangement structure for a gas furnace, which can solve the problems that the gas output of the boiler fluctuates with the production steam, resulting in unstable burner output, especially low burner combustion efficiency at low load, and the like.

[0005] According to the technical solution provided by the utility model: a double burner arrangement structure of a gas furnace includes a furnace, which is connected to a vertical shaft flue; a burner group is installed in the furnace; the bottom of the furnace is a furnace inlet, and the top of the furnace is a smoke outlet, which is connected to the vertical shaft flue; the burner group includes a main burner and an auxiliary burner; the main burner is located below the auxiliary burner.

[0006] As a further improvement of the utility model, the furnace adopts a membrane wall structure; the furnace includes a water-cooled wall, and the water-cooled wall is composed of a plurality of heating tubes.

[0007] As a further improvement of the utility model, the furnace is composed of a water-cooled wall consisting of a front wall, a rear wall and side walls.

[0008] As a further improvement of the present invention, the heating tube and the water-cooled wall are both made of carbon steel, and the heating tube is welded to the water-cooled wall.

[0009] As a further improvement of the utility model, the main burner and the auxiliary burner are respectively installed on the front wall and the rear wall; a first burner mounting hole is opened on the front wall, and the main burner is located in the first burner mounting hole; a second burner mounting hole is opened in the rear wall, and the auxiliary burner is located in the second burner mounting hole.

[0010] As a further improvement of the utility model, a cover shell is arranged outside the main burner and the auxiliary burner.

[0011] As a further improvement of the present invention, a bending angle is provided on the upper part of the furnace.

[0012] As a further improvement of the utility model, a superheater, an economizer and an air preheater are sequentially arranged in the flue gas channel.

[0013] The positive effects of this application are:

[0014] 1. The utility model structure solves the problem of low-load operation of the boiler, including improving combustion efficiency and reducing incomplete combustion losses.

[0015] 2. The utility model can also solve the problem of insufficient superheated steam temperature during low-load operation and reduce the corrosion of the air preheater. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the cover shell of the utility model.

[0018] Figure 3 It is a structural schematic diagram of the furnace of the utility model.

[0019] Figure 1-Figure 3 It includes a front wall 1, a rear wall 2, a side wall 3, a main burner 4, an auxiliary burner 5, a superheater 6, an economizer 7, an air preheater 8, a vertical shaft flue 9, etc. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described herein. In addition, similar terms such as "including" and "having" mean that in addition to those contents already listed in "including" and "having", other contents that have not been listed can also be "included" and "having"; for example, a process, method, system, product or device that can include a series of steps or units is not necessarily limited to those steps or units that have been clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] Due to the angle of the drawing, some components may not be drawn, but their positions and connection relationships can be partially understood based on the text expression.

[0024] like Figure 1 As shown, the utility model is a double burner arrangement structure of a gas furnace, comprising a furnace, which is connected to a vertical shaft flue 9. A burner group is installed in the furnace. The bottom of the furnace is a furnace inlet, and the top of the furnace is a flue gas outlet, which is connected to the vertical shaft flue 9.

[0025] In this embodiment, the burner group includes a main burner 4 and a secondary burner 5. The main burner 4 is located below the secondary burner 5.

[0026] The furnace adopts membrane wall structure. Figure 3 As shown, the furnace is composed of a front wall 1, a rear wall 2, and a side wall 3. The furnace includes a water-cooled wall 1-2, in which a plurality of heating tubes 1-1 are vertically installed. The heating tubes 1-1 and the water-cooled wall 1-2 are both made of carbon steel, and the heating tubes 1-1 are welded to the water-cooled wall 1-2.

[0027] The main burner 4 and the auxiliary burner 5 are respectively installed on the front wall 1 and the rear wall 2. The front wall 1 is provided with a first burner installation hole, and the main burner 4 is located in the first burner installation hole. The rear wall 2 is provided with a second burner installation hole, and the auxiliary burner 5 is located in the second burner installation hole.

[0028] like Figure 2 As shown, the main burner 4 and the auxiliary burner 5 are covered with a cover 1-3 outside to ensure the sealing of the furnace. The cover 1-3 is welded to the water-cooled wall 1-2. Bolt holes are reserved in the cover 1-3 panel according to the size of the burner, and the cover is connected with the burner bolts to facilitate maintenance after shutdown. In addition, in order to facilitate disassembly, a circle of aluminum silicate fiber felt is placed on the burner shell or asphalt is applied before pouring refractory castables.

[0029] A bending angle 10 is provided on the upper part of the furnace, and the bending angle 10 performs secondary mixing of the flue gas in the furnace, thereby improving the uniformity of the flue gas temperature.

[0030] A superheater 6, an economizer 7 and an air preheater 8 are arranged in sequence in the flue gas channel.

[0031] The working process of the utility model is as follows:

[0032] When the boiler is kept running at 110%-80% of the rated load, the main burner 4 and the auxiliary burner 5 are turned on at the same time. When the load fluctuates, only the auxiliary burner 5 needs to be adjusted. This can not only improve the sensitivity of load adjustment, but also ensure the combustion efficiency of the boiler; when the boiler load drops to 80%-30% of the rated load, only the main burner 4 is turned on and the auxiliary burner 5 is turned off. The main burner 4 is adjusted to meet the changes in the production steam working conditions; when the boiler load drops to 30% of the rated load, only the auxiliary burner 5 is turned on. The auxiliary burner 5 is adjusted to meet the changes in the production steam working conditions. The advantages are as follows: 1. The low-load stable combustion capacity of the boiler is improved; 2. The low-load combustion efficiency of the boiler is improved; 3. Because the auxiliary burner 5 is arranged at a higher position, the superheated steam temperature can be better guaranteed, while the exhaust gas temperature is also increased, slowing down the low-temperature corrosion of the air preheater.

[0033] Since the main burner 4 needs to ensure the main load of the boiler, the installation position of the main burner 4 on the front wall 1 must be lower than the auxiliary burner 5. The gas burns in the lower part of the furnace, and this height must be reasonably arranged according to the overall structure of the furnace. As an auxiliary combustion means, the auxiliary burner 5 needs to be arranged at a suitable height from the main burner 4 according to the combustion characteristics, and offset to the left and right directions by a certain distance to control the interference of the flames and prevent collision.

[0034] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A double burner arrangement structure of a gas furnace, comprising a furnace, characterized in that: The furnace is connected to the vertical shaft flue (9); a burner group is installed in the furnace; The bottom of the furnace is the furnace entrance, the top of the furnace is the smoke outlet, and the smoke outlet is connected to the vertical shaft flue (9); the burner group includes a main burner (4) and an auxiliary burner (5); the main burner (4) is located below the auxiliary burner (5).

2. The double burner arrangement structure of the gas stove according to claim 1, characterized in that: The furnace adopts a membrane wall structure; the furnace includes a water-cooled wall (1-2), and a plurality of heating tubes (1-1) are installed in the water-cooled wall (1-2).

3. The double burner arrangement structure of the gas stove according to claim 1, characterized in that: The furnace consists of a front wall (1), a rear wall (2), and side walls (3).

4. The double burner arrangement structure of the gas stove according to claim 2, characterized in that: The heating tube (1-1) and the water-cooled wall (1-2) are both made of carbon steel, and a plurality of heating tubes (1-1) are welded to a steel plate to form the water-cooled wall (1-2).

5. The double burner arrangement structure of the gas stove according to claim 3, characterized in that: The main burner (4) and the auxiliary burner (5) are respectively mounted on the front wall (1) and the rear wall (2); a first burner mounting hole is opened on the front wall (1), and the main burner (4) is located in the first burner mounting hole; a second burner mounting hole is opened in the rear wall (2), and the auxiliary burner (5) is located in the second burner mounting hole.

6. The double burner arrangement structure of the gas stove according to claim 1, characterized in that: A cover shell (1-3) is arranged outside the main burner (4) and the auxiliary burner (5).

7. The double burner arrangement structure of the gas stove according to claim 1, characterized in that: A bending angle (10) is provided at the upper part of the furnace.

8. The double burner arrangement structure of a gas stove as claimed in claim 1, characterized in that: A superheater (6), an economizer (7), and an air preheater (8) are sequentially arranged in the flue gas passage.

Images