Horizontal tube bundle evaporator device for large flue of sintering machine

Abstract

The utility model discloses a horizontal tube bundle evaporator device for a large flue of a sintering machine, and relates to the technical field of flue boilers. The heat exchange tubes are horizontally arranged in the boiler body at intervals; the fins are installed on the heat exchange tubes in a one-to-one correspondence mode, the fins are spiral, and the fins extend in the axial direction of the heat exchange tubes; the at least two partition plates are respectively mounted in the boiler body and are positioned at the front end and the rear end of the heat exchange tube; the expansion joints are installed on the side, facing the inner wall of the boiler body, of the partition plate at intervals. The utility model solves the technical problems that the arrangement of the existing heat exchange tube is easy to influence ash discharge and the anti-abrasion effect is not enough.

Description

Technical Field

[0001] This utility model relates to the field of flue boiler technology, and in particular to a horizontal tube bundle evaporator device for a large flue of a sintering machine. Background Technology

[0002] The working principle of the sintering machine waste heat boiler is based on heat exchange technology. During the sintering process, the sintering machine generates a large amount of high-temperature waste gas, which contains abundant thermal energy. The sintering machine waste heat boiler introduces the waste gas into the boiler through a flue gas inlet located next to the sintering machine or annular cooler. After a series of heat exchange processes, the thermal energy in the waste gas is converted into usable energy forms such as steam or hot water.

[0003] Large flue waste heat boiler evaporators are mostly composed of vertically arranged tube bundles. Due to their structure, several upper and lower connecting pipes need to be arranged in the equipment tube box. Because the connecting pipes are large in size, the bottom ash discharge gap is small, which is not conducive to ash discharge and also poses a risk of wear on the lower connecting pipes. At the same time, the flue gas in the sintering process contains a large amount of sharp sand and dust, which will cause wear on the heat exchange tubes as the flue gas flows or moves. Utility Model Content

[0004] The purpose of this invention is to provide a horizontal tube bundle evaporator device for a sintering machine's large flue, which solves the technical problems of existing boilers where the heat exchange tube arrangement easily affects ash discharge and the anti-wear effect is insufficient.

[0005] This application discloses a horizontal tube bundle evaporator device for a sintering machine's large flue, comprising:

[0006] Boiler body;

[0007] Multiple heat exchange tubes are installed horizontally at intervals inside the boiler body;

[0008] Multiple fins are installed one-to-one on the heat exchange tube. The fins are spiral-shaped and extend along the axial direction of the heat exchange tube.

[0009] At least two baffles are installed inside the boiler body, and the baffles are located at the front and rear ends of the heat exchange tube;

[0010] Multiple expansion joints are installed at intervals on the inner wall side of the partition facing the boiler body.

[0011] This application also includes expansion joints and partitions, which enable free expansion and contraction, ensuring the stability of the overall structure at high temperatures.

[0012] Based on the above technical solution, the embodiments of this application can be further improved as follows:

[0013] Furthermore, the boiler body is equipped with an anti-wear grille, which is located on the air inlet side of the boiler body. The beneficial effect of this step is that the anti-wear grille can effectively reduce dust.

[0014] Furthermore, the bottom of the boiler body is connected to a conical dust discharge channel. The beneficial effect of this step is that the dust is centrally processed through the dust discharge channel.

[0015] Furthermore, at least two baffles are installed inside the dust removal channel. The beneficial effect of this step is that the baffles can effectively reduce the amount of dust carried out, thereby protecting the heat exchange tubes.

[0016] Furthermore, a gap is left between the bottom of the baffle plate and the bottom of the dust discharge channel. The beneficial effect of this step is that the gap can further prevent dust from being carried out.

[0017] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0018] 1. This application is equipped with multiple baffles, which can be used to block dust, thereby reducing the dust content in the flue gas and protecting the heat exchange tubes.

[0019] 2. This application has heat exchange tubes arranged horizontally, which can form sufficient dust removal space.

[0020] 3. This application is equipped with an expansion joint, which enables free expansion and contraction at high temperatures, thereby further ensuring the stability of the structure. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a horizontal tube bundle evaporator device for a sintering machine's large flue, as described in a specific embodiment of this utility model.

[0023] Figure 2 for Figure 1 Top view of the heat exchanger tube section;

[0024] Reference numerals:

[0025] 1-Boiler body; 2-Heat exchange tube; 3-Fins; 4-Baffle; 5-Expansion joint; 6-Wear-resistant grille; 7-Dust discharge channel; 8-Baffle plate. Detailed Implementation

[0026] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0027] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0030] Example:

[0031] like Figure 1-2 As shown, this application discloses a horizontal tube bundle evaporator device for a sintering machine's large flue. First, the vertical heat exchange tube bundle is changed to a horizontal heat exchange tube bundle. The heat exchange tube is also designed by adding fins. Considering the issue of thermal expansion, this application also provides an expansion joint to ensure the stability of the structure.

[0032] like Figure 1 As shown, the specific structure of this application includes:

[0033] Boiler body 1, which is an existing boiler;

[0034] Multiple heat exchange tubes 2 are horizontally arranged and installed at intervals inside the boiler body 1. The multiple heat exchange tubes 2 are combined to form a heat exchange tube bundle to achieve the heat exchange function.

[0035] Multiple fins 3 are installed one-to-one on the heat exchange tube 2. The fins 3 are spiral and extend along the axial direction of the heat exchange tube 2. The fins 3 are perpendicular to the heat exchange tube 2, which is more conducive to dust settling.

[0036] At least two baffles 4 are installed inside the boiler body 1 respectively, and the baffles 4 are located at the front and rear ends of the heat exchange tube 2. The baffles 4 and the heat exchange tube 2 cooperate with each other to form a heat exchange tube bundle to facilitate subsequent heat exchange.

[0037] Multiple expansion joints 5 are installed at intervals on the side of the partition plate 4 facing the inner wall of the boiler body 1, while the other end of the expansion joint 5 is connected to the inner wall of the boiler body 1; the expansion joint 5 is used to provide expansion and contraction, so that it can freely expand and contract under heated working conditions, thereby ensuring the stability of the structure.

[0038] Specifically, such as Figure 2 As shown, the boiler body 1 is equipped with an anti-wear grille 6, which is located on the air inlet side of the boiler body 1. In the sintering machine production process, a large number of sharp sintering particles and trolley grate bars will fall into the flue. In order to protect the heat exchange tubes, an anti-wear grille is arranged on the flue gas inlet side, which can block most of the sintering ore particles and discharge them into the ash hopper from the bottom. It can also prevent the trolley grate bars from falling and damaging the heat exchange tubes.

[0039] To achieve better dust removal, this application provides a conical dust discharge channel 7 connected to the bottom of the boiler body 1; this application also provides a conical dust discharge channel 7 for receiving dust and facilitating centralized treatment.

[0040] To prevent dust from being carried out by the flue gas and colliding with the heat exchange tube again, at least two baffles 8 are installed inside the dust exhaust channel 7. These two baffles 8 are spaced apart to form a barrier and prevent dust from being carried out.

[0041] Specifically, a gap is left between the bottom of the baffle plate 8 and the bottom of the dust discharge channel 7, thus forming a certain space to prevent the heat exchange tube from contacting the accumulated dust, and also to effectively prevent the dust from being carried out.

[0042] Further explanation is provided regarding this application:

[0043] The boiler body 1 of this application is provided with a dust discharge channel at the bottom and a baffle plate. In this way, the dust is located at the bottom of the cavity and is not easily carried out by the flue gas, which can better prevent the heat exchange tube from being worn.

[0044] This application also includes an expansion joint, which allows for free expansion and contraction while ensuring structural stability.

[0045] In this application, the baffle plate is arranged inside the dust removal channel, which is under negative pressure during operation. Under negative pressure, it is difficult to remove the ash accumulated in the hopper. When the ash reaches a certain height, it will form a vortex under suction, which will scour the lower heat exchange tubes. The purpose of adding the baffle plate is to disrupt the vortex stroke, thereby more effectively protecting the lower heat exchange tubes.

[0046] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A horizontal tube bundle evaporator device for a sintering machine's large flue, characterized in that, include: Boiler body (1); Multiple heat exchange tubes (2) are installed horizontally at intervals inside the boiler body (1); Multiple fins (3) are installed one-to-one on the heat exchange tube (2). The fins (3) are spiral and extend along the axial direction of the heat exchange tube (2). At least two partitions (4) are installed inside the boiler body (1), and the partitions (4) are located at the front and rear ends of the heat exchange tube (2); Multiple expansion joints (5) are installed at intervals on the inner wall side of the partition (4) facing the boiler body (1).

2. The sintering machine large flue horizontal tube bundle evaporator device according to claim 1, characterized in that, The boiler body (1) is equipped with an anti-wear grille (6), which is located on the air inlet side of the boiler body (1).

3. The sintering machine large flue horizontal tube bundle evaporator device according to claim 1, characterized in that, The bottom of the boiler body (1) is connected to a conical dust discharge channel (7).

4. The sintering machine large flue horizontal tube bundle evaporator device according to claim 3, characterized in that, At least two baffles (8) are installed inside the dust discharge channel (7).

5. The sintering machine large flue horizontal tube bundle evaporator device according to claim 4, characterized in that, There is a gap between the bottom of the baffle plate (8) and the bottom of the dust discharge channel (7).

Images