Self-opening and closing type anti-explosion protection device of power plant boiler coal pulverizing system

Abstract

The utility model discloses a self-opening and closing type anti-explosion protection device of a power plant boiler pulverizing system, and relates to the technical field of anti-explosion protection, the self-opening and closing type anti-explosion protection device comprises 45-degree elbows welded on the two sides of a square-round joint of a hot air inlet of a coal mill, and self-opening and closing type anti-explosion doors are welded on the 45-degree elbows; a supporting assembly used for bearing the self-opening-closing type explosion door is arranged at the bottom of the coal mill hot air inlet square and round joint. The self-opening and closing type anti-explosion doors are installed on the two sides of the coal mill hot air inlet square and round joint with the large space, the installation requirement of the self-opening and closing type anti-explosion doors for the space is met, the supporting assembly is installed at the bottom of the coal mill hot air inlet square and round joint, and when the anti-explosion doors are opened for pressure relief, impact loads are symmetrically used for the supporting assembly, so that the anti-explosion doors are not damaged. The operation load of the explosion door can be effectively supported, and the stability of the arrangement structure of the explosion door is ensured.

Description

Technical Field

[0001] This application relates to the field of explosion protection technology, specifically to a self-closing explosion protection device for a power plant boiler pulverizing system. Background Technology

[0002] The internal medium of the pulverizing system in a power plant boiler is a high-volatile gas-powder mixture, which has explosive properties. In the event of an explosion, not only will the equipment be damaged, affecting the safe operation of the power plant, but it may also cause serious personal injury and fire accidents. Therefore, a sufficient number of explosion-proof doors must be installed in the pulverizing system. In the event of overpressure during operation, the gas-powder mixture can be forced through the explosion-proof doors and discharged, preventing excessive internal pressure from damaging the equipment.

[0003] Power plant boiler pulverizing systems conventionally use diaphragm-type explosion-proof doors, which have advantages such as small installation space. However, when the diaphragm ruptures due to overpressure during pulverizing system operation, manual replacement of the diaphragm is required, making operation and maintenance complex. Many power plants are now upgrading to self-closing explosion-proof doors, which automatically recover after pressure relief, simplifying operation and maintenance and significantly saving labor and maintenance costs. However, because the original diaphragm-type explosion-proof doors had limited space, the size of the self-closing explosion-proof door equipment cannot meet the space requirements. Furthermore, when the explosion-proof door operates under overpressure relief, the ejected high-temperature coal dust can cause injury to operators. Utility Model Content

[0004] The main purpose of this application is to provide a self-closing explosion-proof protection device for a power plant boiler pulverizing system, which aims to solve the above-mentioned technical problems.

[0005] The technical solution adopted in this application is as follows:

[0006] A self-closing explosion-proof protection device for a power plant boiler pulverizing system includes 45° elbows welded to both sides of the square section of the hot air inlet of a coal mill. A self-closing explosion-proof door is welded to each 45° elbow. A support assembly for supporting the self-closing explosion-proof door is provided at the bottom of the square section of the hot air inlet of the coal mill.

[0007] Optionally, the support assembly includes a base plate, steel columns, and vibration damping supports. The base plate is fixed to the bottom surface by self-cutting bottom anchors. The steel columns are connected between the base plate and the vibration damping supports. The vibration damping supports are fixedly connected to the square-round section of the coal mill hot air inlet.

[0008] Optionally, a protective baffle is provided at the bottom of the self-closing explosion-proof door.

[0009] Compared with the prior art, the beneficial effects of this application are:

[0010] First: The self-closing explosion-proof protection device for a power plant boiler pulverizing system proposed in this application satisfies the space requirements for the installation of self-closing explosion-proof doors by installing them on both sides of the square and round sections of the hot air inlet of the coal mill, which has a relatively large space.

[0011] Second: The self-closing explosion-proof protection device for a power plant boiler pulverizing system proposed in this application, by installing a support component at the bottom of the square and round section of the hot air inlet of the coal mill, when the explosion-proof door is opened to release pressure, the impact load is symmetrically applied to the support component, which can effectively support the operating load of the explosion-proof door and ensure the stability of the explosion-proof door arrangement structure.

[0012] Third: The self-closing explosion-proof protection device for a power plant boiler pulverizing system proposed in this application, by setting a protective baffle at the bottom of the explosion-proof door, when the pulverizing system is overpressurized, the top cover of the self-closing explosion-proof door is pushed open to release pressure, and high-temperature coal powder and hot air will be sprayed in all directions. The protective baffle can block the downward spray of high-temperature coal powder and hot air, thus protecting the safety of the site. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of the self-starting and closing explosion-proof protection device for the power plant boiler pulverizing system provided in the embodiments of this application, viewed from one angle.

[0014] Figure 2 This is a schematic diagram of the structure of the self-starting and closing explosion-proof protection device for a power plant boiler pulverizing system provided in this application embodiment after the installation of the protective baffle.

[0015] Explanation of the labels in the attached drawings:

[0016] 1- Coal mining machine hot air inlet square section, 2- 45° elbow, 3- Self-closing explosion-proof door, 4- Support assembly, 5- Protective baffle. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0021] See attached document Figure 1 As shown in the embodiment of this application, a self-closing explosion-proof protection device for a power plant boiler pulverizing system is provided. Based on the pulverizing system layout, since the space on both sides of the square-round section 1 of the coal mill hot air inlet is relatively large, it is suitable for installing a self-closing explosion-proof door 3. Symmetrical holes are made on both sides of the square-round section 1 of the coal mill hot air inlet, and 45° elbows 2 are welded on. The self-closing explosion-proof door 3 is then directly butt-welded to the 45° elbows 2, resulting in a 45° angled installation of the self-closing explosion-proof door 3. Simultaneously, a support assembly 4 is provided at the bottom of the square-round section to provide stable support for the self-closing explosion-proof door 3. The support assembly 4 includes a base plate, steel columns, and vibration damping supports. The base plate is fixed to the bottom surface by self-cutting bottom anchors. The steel columns connect the base plate and the vibration damping supports. The vibration damping supports are fixedly connected to the square-round section 1 of the coal mill hot air inlet. The vibration damping supports consist of a seat body and a shock absorber mounted on the seat body. The seat body is welded to the steel columns, and the shock absorber is fixed to the square-round section. The support assembly 4 can effectively support the operating load of the explosion-proof door and balance the displacement changes in all directions during pressure relief. This design facilitates the installation of the explosion-proof door and ensures that when the explosion-proof door is opened for pressure relief, the impact load acts symmetrically on the support assembly 4, achieving a balance of operating loads and guaranteeing the structural stability of the explosion-proof door.

[0022] like Figure 2As shown, in a preferred embodiment, when the system is overpressurized, the top cover of the self-closing explosion-proof door 3 is opened to release pressure, and high-temperature coal dust and hot air will spray outwards. Therefore, a protective baffle 5 is installed at the bottom of the self-closing explosion-proof door 3 to block the downward spray of high-temperature coal dust and hot air, thereby protecting on-site safety. Of course, since the arrangement position of the square and round sections 1 of the hot air inlet of the coal mill in different power plants is different, the protective baffle 5 can be adjusted according to the protection space. Taking the placement on the side of the personnel working area as a reference, such as the operation and maintenance area next to the explosion-proof door, the protective baffle 5 is installed.

[0023] In summary, the embodiments of this application provide a self-closing explosion-proof protection device for a power plant boiler pulverizing system. By installing self-closing explosion-proof doors on both sides of the hot air inlet square section of the coal mill, the explosion-proof operation and maintenance are simple, saving labor and operation and maintenance costs. The protective baffle at the bottom of the explosion-proof door can reduce safety accidents, improve the safety protection of operation and maintenance personnel, reduce downtime due to accidents, and improve the economic efficiency of power plant operation.

[0024] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A self-starting and self-closing explosion protection device for a pulverizing system of a power plant boiler, characterized in that, The 45° elbow is welded on both sides of the square round section of the hot air inlet of the coal mill, and a self-closing explosion-proof door is welded on the 45° elbow.

2. The self-starting and self-closing explosion protection device for a pulverizing system of a power plant boiler according to claim 1, characterized in that, The support assembly comprises a bottom plate, a profile steel support column and a shock-absorbing support, the bottom plate is fixed to the bottom surface through self-cutting bottom anchors, the profile steel support column is connected between the bottom plate and the shock-absorbing support, and the shock-absorbing support is fixedly connected to the square round section of the hot air inlet of the coal mill.

3. The self-starting and self-closing explosion protection device for a pulverizing system of a power plant boiler according to claim 1, characterized in that, A protective baffle is arranged at the bottom of the self-closing explosion-proof door.

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