Horizontal waste heat steam boiler

Abstract

The utility model discloses a horizontal waste heat steam boiler which comprises a boiler body, one end of the boiler body is provided with a waste heat flue gas inlet, the other end of the boiler body is provided with a waste heat flue gas outlet, a heat exchange coil pipe is arranged in the boiler body, an ash blocking metal filter screen is arranged at the waste heat flue gas inlet of the boiler body, and the ash blocking metal filter screen is arranged at the waste heat flue gas outlet of the boiler body. More than two layers of dust blocking metal filter screens are arranged, and filter holes between two adjacent layers of dust blocking metal filter screens are arranged in a staggered manner. The problems that dust accumulation outside a heat exchange coil in an existing horizontal waste heat steam boiler is serious, and the heat exchange efficiency is affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of boilers, and in particular to a horizontal waste heat steam boiler. Background Technology

[0002] A waste heat steam boiler is a boiler device that uses waste heat flue gas to heat and generate steam. It is a commonly used type of boiler. The existing structure of a waste heat steam boiler mainly includes a furnace body connected to the waste heat flue gas pipeline and heat exchange coils installed in the furnace body. This type of waste heat steam boiler is simple and practical. If you cannot understand the details, you can refer to the structure disclosed in the patent application number "CN201610872974.8" for further understanding.

[0003] Although the existing horizontal waste heat steam boiler is relatively mature, it still has some problems. After a long period of use, it was found that even with soot blowing pipes installed, ash accumulation on the heat exchange coils inside the boiler is still very serious, which greatly affects the heat exchange efficiency. Therefore, improvements are needed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to provide a horizontal waste heat steam boiler that solves the problem of severe ash accumulation on the outside of the heat exchange coils in existing horizontal waste heat steam boilers, which affects heat exchange efficiency. To solve the above-mentioned technical problem, this utility model adopts the following technical solution:

[0005] A horizontal waste heat steam boiler includes a boiler body, one end of which is provided with a waste heat flue gas inlet and the other end of which is provided with a waste heat flue gas outlet. The boiler body is provided with a heat exchange coil. The waste heat flue gas inlet of the boiler body is provided with an ash-catching metal filter screen, which has two or more layers and the filter holes between adjacent layers of ash-catching metal filter screen are staggered.

[0006] A metal filter screen for ash trapping is installed at the inlet of the waste heat flue gas, which can filter most of the soot outside the boiler. This, together with the soot blowing port of the boiler body itself, can effectively solve the problem of serious ash accumulation on the outer wall of the heat exchange coil inside the boiler body. Since the filter holes between the two adjacent layers of metal filter screens are staggered, the ash trapping effect is good.

[0007] As a further preferred embodiment of this utility model, the ash-blocking metal filter screen includes a screen plate body and a spring connecting structure. The elastic connecting structure is located at the rear end of the four corners of the screen plate body. The screen plate body is connected to the pipe wall of the waste heat flue gas inlet through the spring connecting structure. The bottom of the waste heat flue gas inlet, directly opposite the screen plate body, is provided with a downwardly recessed flue gas impurity collection groove.

[0008] Because the mesh plate of the ash-catching metal filter screen is connected to the pipe wall of the waste heat flue gas inlet through a spring connection structure, when the flue gas acts on it, the mesh plate body shakes slightly. This causes the dust intercepted on its surface to fall downward into the flue gas impurity collection tank, instead of clogging the filter holes of the mesh plate body too quickly, thus allowing the ash-catching metal filter screen to be used for a longer period of time.

[0009] As a further preferred embodiment of this invention, the flue gas impurity collection trough is L-shaped.

[0010] The dust that falls into the flue gas impurity collection tank is not easy to escape from the opening of the flue gas impurity collection tank, but instead enters the dust collection part with the "L" shaped structure.

[0011] As a further preferred embodiment of this utility model, the bottom of the flue gas impurity collection tank is provided with an air inlet and an ash discharge outlet, and the air inlet and ash discharge outlet are provided with a flip-type opening and closing baffle.

[0012] It facilitates the discharge of smoke and dust accumulated in the flue gas impurity collection tank.

[0013] As a further preferred embodiment of this utility model, the top of the waste heat flue gas inlet is also provided with a mesh plate flushing nozzle, which is located at the rear end of the mesh plate body, and each layer of ash-blocking metal filter screen is provided with a set of flushing nozzles.

[0014] When the flow rate decreases, the screen body can be rinsed through the flushing nozzles.

[0015] As a further preferred embodiment of this utility model, a heat exchange coil ash blowing port is provided on one side of the boiler body, and a boiler ash discharge port is provided at the bottom of the boiler body.

[0016] This facilitates the blowing and ash removal of heat exchange coils inside the boiler body.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] 1. A metal filter screen for ash trapping is installed at the inlet of the waste heat flue gas, so that most of the soot can be filtered outside the boiler. In combination with the soot blowing port of the boiler body itself, the problem of serious ash accumulation on the outer wall of the heat exchange coil inside the boiler body can be effectively solved. Since the filter holes between the two adjacent layers of metal filter screens are staggered, the ash trapping effect is good.

[0019] 2. Since the screen body of the ash-catching metal filter is connected to the pipe wall of the waste heat flue gas inlet through a spring connection structure, when the flue gas acts on it, the screen body shakes slightly. This causes the dust intercepted on its surface to fall downward into the flue gas impurity collection tank, instead of clogging the filter holes of the screen body too quickly, thus allowing the ash-catching metal filter to be used for a longer period of time.

[0020] 3. The dust that falls into the flue gas impurity collection tank is not easy to escape from the opening of the flue gas impurity collection tank, but instead enters the dust collection part with the "L" shaped structure.

[0021] 4. Facilitates the discharge of smoke and dust accumulated in the flue gas impurity collection tank.

[0022] 5. When the flow rate decreases, the screen body can be rinsed through the flushing nozzle. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the structure of the dust-blocking metal filter screen of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Specific Implementation Example 1:

[0032] Figure 1 , Figure 2 A horizontal waste heat steam boiler is shown, including a boiler body 1. One end of the boiler body 1 is provided with a waste heat flue gas inlet 11, and the other end of the boiler body 1 is provided with a waste heat flue gas outlet 12. A heat exchange coil 2 is provided inside the boiler body 1. An ash-blocking metal filter screen 3 is provided at the waste heat flue gas inlet 11 of the boiler body 1. The ash-blocking metal filter screen 3 has two or more layers, and the filter holes between adjacent layers of ash-blocking metal filter screen 3 are staggered.

[0033] A metal filter screen for ash trapping is installed at the inlet of the waste heat flue gas, which can filter most of the soot outside the boiler. This, together with the soot blowing port of the boiler body itself, can effectively solve the problem of serious ash accumulation on the outer wall of the heat exchange coil inside the boiler body. Since the filter holes between the two adjacent layers of metal filter screens are staggered, the ash trapping effect is good. Specific Implementation Example 2:

[0035] This embodiment further describes the ash metal filter screen 3 based on specific embodiment 1. The ash-blocking metal filter screen 3 includes a screen body 31 and a spring connecting structure 32. The elastic connecting structure 32 is set at the rear end of the four corners of the screen body 31. The screen body 31 is connected to the pipe wall of the waste heat flue gas inlet 11 through the spring connecting structure 32. The bottom of the waste heat flue gas inlet 11 is provided with a downwardly recessed flue gas impurity collection groove 4 at the position opposite to the screen body.

[0036] Because the mesh plate of the ash-catching metal filter screen is connected to the pipe wall of the waste heat flue gas inlet through a spring connection structure, when the flue gas acts on it, the mesh plate body shakes slightly. This causes the dust intercepted on its surface to fall downward into the flue gas impurity collection tank, instead of clogging the filter holes of the mesh plate body too quickly, thus allowing the ash-catching metal filter screen to be used for a longer period of time. Specific Implementation Example 3:

[0038] This embodiment further describes the flue gas impurity collection tank 4 based on specific embodiment 2. The flue gas impurity collection tank 4 is L-shaped.

[0039] The dust that falls into the flue gas impurity collection tank is not easy to escape from the opening of the flue gas impurity collection tank, but instead enters the dust collection part with the "L" shaped structure. Specific Implementation Example 4:

[0041] This embodiment further describes the flue gas impurity collection tank 4 based on specific embodiment 2. The bottom of the flue gas impurity collection tank 4 is provided with an air inlet and an ash discharge outlet, and a flip-type opening and closing baffle is provided at the air inlet and ash discharge outlet.

[0042] It facilitates the discharge of smoke and dust accumulated in the flue gas impurity collection tank. Specific Implementation Example 5:

[0044] This embodiment further describes the waste heat flue gas inlet 11 based on specific embodiment 2. The top of the waste heat flue gas inlet 11 is also provided with a mesh plate flushing nozzle 5. The mesh plate flushing nozzle 5 is located at the rear end of the mesh plate body 31. Each layer of ash-blocking metal filter screen 4 is provided with a set of flushing nozzles 5.

[0045] When the flow rate decreases, the screen body can be rinsed through the flushing nozzles. Specific Implementation Example 6:

[0047] This embodiment further describes the boiler body 1 based on specific embodiment 1. The boiler body 1 has a heat exchange coil soot blowing port 13 on one side and a boiler ash discharge port at the bottom.

[0048] This facilitates the blowing and ash removal of heat exchange coils inside the boiler body.

[0049] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A horizontal waste heat steam boiler, comprising a boiler body (1), wherein one end of the boiler body (1) is provided with a waste heat flue gas inlet (11), and the other end of the boiler body (1) is provided with a waste heat flue gas outlet (12), and a heat exchange coil (2) is provided inside the boiler body (1), characterized in that: An ash blocking metal filter (3) is provided at the waste heat flue gas inlet (11) of the boiler body (1), wherein the ash blocking metal filter (3) has more than two layers, and the filter holes between two adjacent layers of the ash blocking metal filter (3) are arranged in a staggered manner.

2. The horizontal waste heat steam boiler according to claim 1, characterized in that: The ash intercepting metal filter (3) comprises a mesh plate body (31) and a spring connection structure (32), wherein the spring connection structure (32) is arranged at the rear ends of the four corners of the mesh plate body (31), and the mesh plate body (31) is connected to the pipe wall of the waste heat flue gas inlet (11) via the spring connection structure (32), and a flue gas impurity collection groove (4) which is recessed downwards is provided at the bottom of the waste heat flue gas inlet (11) directly facing the mesh plate body.

3. The horizontal waste heat steam boiler according to claim 2, characterized in that: The flue gas impurity collection tank (4) is in an "L" shape.

4. The horizontal waste heat steam boiler according to claim 2, characterized in that: An air inlet and an ash discharge port are provided at the bottom of the flue gas impurity collection tank (4), and a flip-type opening and closing baffle is provided at the air inlet and ash discharge port.

5. The horizontal waste heat steam boiler according to claim 2, characterized in that: A mesh plate flushing nozzle (5) is also provided at the top of the waste heat flue gas inlet (11), and the mesh plate flushing nozzle (5) is arranged at the rear end of the mesh plate body (31), and each layer of the ash blocking metal filter (3) is correspondingly provided with a set of flushing nozzles (5).

6. The horizontal waste heat steam boiler according to claim 1, characterized in that: A heat exchange coil soot blowing port (13) is provided on one side of the boiler body (1), and a boiler soot discharge port is provided at the bottom of the boiler body (1).

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