Omega-shaped overheating and waste heat boiler device

Abstract

The utility model discloses an omega-shaped overheating and waste heat boiler device, the overheating and waste heat boiler device comprises an L-shaped heat insulation hearth at the front part and a convection flue at the rear part, the outlet of the L-shaped heat insulation hearth is connected with the convection flue, the L-shaped heat insulation hearth consists of a combustion chamber front wall, a combustion chamber side wall, a combustion chamber rear wall and a combustion chamber outlet front wall, a gas burner is arranged on a protective plate of the front wall of the combustion chamber, an n-shaped transition flue is connected to the convection flue, and an air preheater is connected to the n-shaped transition flue. After high-temperature flue gas combusted in the L-shaped heat insulation hearth is turned by 90 degrees, the temperature field is more uniform, and the combustion efficiency is improved. The problem that a flue gas flow field of a convection heating surface is easy to change when being connected with flue gas treatment equipment is solved; meanwhile, the uniformity of flue gas flow fields at the inlet and outlet of the superheater and the inlet and outlet of the waste heat boiler evaporator and economizer is guaranteed, and full utilization and safe and stable operation of the boiler heating surface are better guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to an Ω-shaped superheater and waste heat boiler device. Background Technique

[0002] At present, a large amount of saturated steam is generated in the production process of iron and steel enterprises. According to different uses, heat treatment is required for the saturated steam. A steam superheater is a device that heats and processes saturated steam into superheated steam. Usually, a steam superheater is divided into two parts, a front combustion chamber and a rear convection flue. Steam heating tubes are arranged in the convection flue. After passing through the steam heating tubes, the flue gas temperature is usually still above 350°C. The recovery and utilization of this part of waste heat resources are of great practical significance for China to achieve the energy conservation, emission reduction, and environmental protection development strategies. Therefore, designing a superheater and waste heat boiler device is an important measure to reduce energy consumption and rationally and efficiently utilize limited resources. Content of the Utility Model

[0003] The purpose of the utility model is to solve the technical problems existing in the prior art and provide an Ω-shaped superheater and waste heat boiler device.

[0004] To achieve the above purpose, the technical solution provided by the utility model is: an Ω-shaped superheater and waste heat boiler device, the superheater and waste heat boiler device includes a front L-shaped adiabatic furnace and a rear convection flue, the outlet of the L-shaped adiabatic furnace is connected to the convection flue, the L-shaped adiabatic furnace is composed of a front wall of the combustion chamber, side walls of the combustion chamber, a rear wall of the combustion chamber, and a front wall of the combustion chamber outlet. A gas burner is arranged on the guard plate of the front wall of the combustion chamber. A ∏-shaped transition flue is connected to the convection flue, and an air preheater is connected to the ∏-shaped transition flue.

[0005] Preferably, a plurality of superheaters are arranged in the convection flue.

[0006] Preferably, the gas burner makes the gas burn in the L-shaped adiabatic furnace to generate high-temperature flue gas. The high-temperature flue gas turns 90° in the L-shaped adiabatic furnace and then enters the convection flue, so that the flue gas evenly flows through the heating surface of the superheater.

[0007] Preferably, two evaporators and a economizer are arranged in the ∏-shaped transition flue, and the economizer is arranged below the lowermost evaporator.

[0008] Preferably, a waste heat boiler steam drum is also arranged in the superheater and waste heat boiler device.

[0009] Preferably, the ∏-shaped transition flue has the same structure as the SCR denitration device.

[0010] Advantages of the Utility Model:

[0011] 1. The utility model is provided with an L-shaped adiabatic furnace, which has a small floor area, significantly reduces the overall height of the boiler, greatly reduces the steel consumption of the support structure, and has good economy.

[0012] 2. In the utility model, after the high-temperature flue gas burned in the L-shaped adiabatic furnace turns by 90°, the temperature field is more uniform, solving the problem that the flue gas flow field of the convective heating surface is easily changed when connecting with the flue gas treatment equipment; at the same time, the uniformity of the flue gas flow field at the inlet and outlet of the superheater of the superheater and at the inlet and outlet of the evaporator and economizer of the waste heat boiler is ensured, better ensuring the full utilization of the boiler heating surface and the safe and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the utility model, and constitute a part of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute an improper limitation to the utility model.

[0014] Figure 1 is a schematic diagram of the overall structure of the preferred embodiment of the utility model;

[0015] Reference numerals in the drawings:

[0016] 1 - gas burner, 2 - front wall of the combustion chamber, 3 - side wall of the combustion chamber, 4 - rear wall of the combustion chamber, 5 - front wall before the outlet of the combustion chamber, 6 - convective flue, 7 - superheater, 8 - steam drum of the waste heat boiler, 9 - ∏-shaped transition flue, 10 - evaporator, 11 - economizer, 12 - air preheater. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] This part will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation to the protection scope of the utility model.

[0018] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, rear, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model.

[0019] In the description of the present utility model, the meaning of "a number of" is one or more, the meaning of "a plurality of" is more than two, and understandings such as "greater than", "less than", and "exceeding" do not include the corresponding number, while understandings such as "above", "below", and "within" include the corresponding number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0020] In the description of the present utility model, unless otherwise clearly defined, words such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0021] Refer to Figure 1 , a preferred embodiment of the present utility model, an Ω-shaped superheated and waste heat boiler device, comprising a gas burner, a front wall of the combustion chamber, side walls of the combustion chamber, a rear wall of the combustion chamber, a front wall at the outlet of the combustion chamber, a convection flue, a number of superheaters, a waste heat boiler steam drum, a ∏-shaped transition flue, an evaporator, a economizer, an air preheater;

[0022] The L-shaped adiabatic furnace is composed of the front wall 2 of the combustion chamber, the side walls 3 of the combustion chamber, the rear wall 4 of the combustion chamber, and the front wall 5 at the outlet of the combustion chamber. Its floor area is not large, which significantly reduces the overall height of the boiler and greatly reduces the steel consumption of the support structure, having good economy; the outlet of the L-shaped adiabatic furnace is connected to the convection flue, and a ∏-shaped transition flue is connected to the convection flue, and an air preheater is connected to the ∏-shaped transition flue.

[0023] Furthermore, the ∏-shaped transition flue 9 has the same structure as the SCR denitration device, and the two can be perfectly switched; at the same time, the ∏-shaped transition flue 9 has a simple structure and can solve the problem of the flue gas flow field of the convection heating surface connected thereto.

[0024] Among them, the SCR denitration device is a mature existing technology well-known to those skilled in the art, and its structure and principle are known to those skilled in the art, so no detailed description is given.

[0025] The working principle of the present utility model: The gas burner is installed on the front wall guard plate of the adiabatic furnace, so that the gas burns in the L-shaped adiabatic furnace to generate high-temperature flue gas. The high-temperature flue gas undergoes a 90° turn in the L-shaped adiabatic furnace, making the gas combustion more complete. At the same time, after the high-temperature flue gas undergoes a 90° turn, the temperature field is more uniform, and it evenly flows through the superheater heating surface, then enters the ∏-shaped transition flue, and then passes through the evaporator and economizer in the superheated and waste heat boiler device, and finally flows through the air preheater of the superheater and is discharged into the atmosphere.

[0026] The gas burner 1 is installed on the guard plate of the front wall 2 of the combustion chamber. The gas burner 1 enables the gas to burn in the L-shaped adiabatic furnace to generate high-temperature flue gas. The high-temperature flue gas undergoes a 90° turn in the L-shaped adiabatic furnace, making the gas combustion more complete. At the same time, after the high-temperature flue gas undergoes a 90° turn, the temperature field is more uniform; it solves the problem that the flue gas flow field of the convective heating surface is easily changed when connecting with the flue gas treatment equipment; at the same time, it ensures the uniformity of the flue gas flow field at the inlet and outlet of the superheater, the evaporator, and the economizer, and better ensures the full utilization of the boiler heating surface and the safe and stable operation.

[0027] On the premise of not causing conflicts, those skilled in the art can freely combine and superimpose the above-mentioned additional technical features.

[0028] The above is only the preferred implementation mode of the present utility model. As long as the technical solutions that achieve the purpose of the present utility model by basically the same means are within the protection scope of the present utility model.

Claims

1. An Ω-type superheating and waste heat boiler device, characterized in that: The superheating and waste heat boiler device comprises an L-shaped insulated furnace at the front and a convection flue (6) at the rear. The outlet of the L-shaped insulated furnace is connected to the convection flue (6). The L-shaped insulated furnace is composed of a combustion chamber front wall (2), a combustion chamber side wall (3), a combustion chamber rear wall (4), and a combustion chamber outlet front wall (5). A gas burner (1) is arranged on the guard plate of the combustion chamber front wall (2). The convection flue (6) is connected to a ∏-shaped transition flue (9), and the ∏-shaped transition flue (9) is connected to an air preheater (12).

2. The Ω-type superheating and waste heat boiler device according to claim 1 is characterized in that: A plurality of superheaters (7) are arranged in the convection flue (6).

3. The Ω-type superheating and waste heat boiler device according to claim 2 is characterized in that: The gas burner (1) causes the gas to burn in the L-shaped insulated furnace to generate high-temperature flue gas, and the high-temperature flue gas enters the convection flue (6) after a 90° turn in the L-shaped insulated furnace, so that the flue gas flows evenly over the heating surface of the superheater (7).

4. The Ω-type superheating and waste heat boiler device according to claim 1 is characterized in that: Two evaporators (10) and an economizer (11) are arranged in the ∏-shaped transition flue (9), and the economizer (11) is arranged below the lowest evaporator (10).

5. The Ω-type superheating and waste heat boiler device according to claim 1 is characterized in that: The superheating and waste heat boiler device is also provided with a waste heat boiler steam drum (8).

6. The Ω-type superheating and waste heat boiler device according to claim 1, characterized in that: The ∏-shaped transition flue (9) has the same structure as the SCR denitration device.

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