Boiler flue interlocking protection device

Abstract

The boiler flue interlocking protection device is characterized in that a baffle position monitor and a flue gas pressure monitor are arranged in a flue of a boiler, the baffle position monitor and the flue gas pressure monitor are both connected with the input end of an anti-deflagration controller, and the output end of the anti-deflagration controller is connected with a starting circuit of the boiler; only when the flue baffle is in the full-open state and the flue gas pressure is below the set value, the boiler can be normally started, the conditions of insufficient purging and fuel gas accumulation in a hearth caused by insufficient opening degree or full closing of the flue baffle are effectively avoided, and the boiler is prevented from deflagration accidents.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a boiler flue interlocking protection device. Background Art

[0002] According to the requirements of the Boiler Safety Technical Regulations (TSG11-2020), when more than two (including two) boilers share one main flue, a flue damper with a reliable limit device should be installed on the branch flue of each boiler. In order to ensure the normal operation of the boiler smoke and wind system, the flue damper needs to be manually set to the open position. If the flue damper is forgotten to be opened when the boiler is started, or the limit device is abnormal, causing the flue damper to be insufficiently opened or fully closed, it will lead to insufficient purge in the furnace and accumulation of gas, which is prone to explosion accidents. Utility Model Content

[0003] In view of this, an embodiment of the utility model provides a boiler flue interlock protection device to avoid technical problems such as insufficient purging in the furnace and accumulation of fuel gas due to insufficient opening or full closure of the flue damper.

[0004] The utility model provides a boiler flue interlocking protection device, comprising:

[0005] A flue damper, movably mounted in the flue of the boiler, for opening or closing the flue;

[0006] a damper position monitor, installed in the flue, for monitoring the opening of the flue damper;

[0007] a flue gas pressure monitor installed in the flue and used to monitor the flue gas pressure on the primary side of the flue damper; and

[0008] An anti-explosion controller, wherein the output end of the anti-explosion controller is connected to the start-up circuit of the boiler, and the damper position monitor and the flue gas pressure monitor are both connected to the input end of the anti-explosion controller;

[0009] When the flue damper is in a fully open state and the flue gas pressure is below the set value, the output signal of the explosion-proof controller is closed, and the boiler can be started normally; when the flue damper is in a non-fully open state and / or the flue gas pressure exceeds the set value, the output signal of the explosion-proof controller is disconnected, and the boiler cannot be started.

[0010] Optionally, the damper position monitor adopts a limit switch, and the limit switch is set at the fully open position of the flue damper.

[0011] Optionally, the flue gas pressure monitor adopts a pressure switch, and the pressure switch is arranged between the flue damper and the boiler.

[0012] The embodiments of the utility model have the following beneficial effects: a damper position monitor and a flue gas pressure monitor are arranged in the flue of the boiler, the damper position monitor and the flue gas pressure monitor are both connected to the input end of the explosion-proof controller, and the output end of the explosion-proof controller is connected to the starting circuit of the boiler, and the boiler can only be started normally when the flue damper is in a fully open state and the flue gas pressure is below the set value, effectively avoiding insufficient purging and gas accumulation in the furnace due to insufficient opening or full closure of the flue damper, thereby preventing explosion accidents in the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

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

[0015] The numbers in the figure represent:

[0016] 1. Flue damper; 2. Damper position monitor; 3. Flue gas pressure monitor; 4. Explosion-proof controller; 5. Boiler; 6. Flue; 7. Starting circuit. DETAILED DESCRIPTION

[0017] 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, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0018] See also Figure 1As shown, an embodiment of the utility model provides a boiler flue interlocking protection device, including a flue damper 1, a damper position monitor 2, a flue gas pressure monitor 3 and an anti-explosion controller 4. The flue damper 1 is movably installed in the flue 6 of the boiler 5, and is used to open or close the flue 6. The damper position monitor 2 is installed in the flue 6, and is used to monitor the opening of the flue damper 1. The flue gas pressure monitor 3 is also installed in the flue 6, and is used to monitor the flue gas pressure on the primary side of the flue damper 1. The damper position monitor 2 and the flue gas pressure monitor 3 are both connected to the input end of the anti-explosion controller 4, and the output end of the anti-explosion controller 4 is connected to the starting circuit 7 of the boiler 5.

[0019] Specifically, the damper position monitor 2 in the embodiment of the utility model adopts a limit switch, which is set at the fully open position of the flue damper 1 and can monitor whether the flue damper 1 is in a fully open state. The flue gas pressure monitor 3 adopts a pressure switch, which is set between the flue damper 1 and the boiler 5 and can monitor whether the flue gas pressure on the primary side of the flue damper 1 exceeds a set value, which can be set specifically according to the on-site flue conditions.

[0020] When the flue damper 1 is in a fully open state and the flue gas pressure is below the set value, the flue 6 is determined to be normal. At this time, the output signal of the anti-explosion controller 4 is closed, and the boiler 5 can start normally; when the flue damper 1 is in a non-fully open state (half open or fully closed), and / or the flue gas pressure exceeds the set value, the flue 6 is determined to be abnormal. At this time, the output signal of the anti-explosion controller 4 is disconnected, and the boiler 5 cannot be started, effectively avoiding insufficient purging and gas accumulation in the furnace due to insufficient opening or full closure of the flue damper 1, thereby preventing explosion accidents in the boiler 5.

[0021] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present invention. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A boiler flue interlocking protection device, characterized in that: include: A flue damper, movably mounted in the flue of the boiler, for opening or closing the flue; a damper position monitor, installed in the flue, for monitoring the opening of the flue damper; A flue gas pressure monitor installed in the flue and used to monitor the flue gas pressure on the primary side of the flue damper; as well as An anti-explosion controller, wherein the output end of the anti-explosion controller is connected to the start-up circuit of the boiler, and the damper position monitor and the flue gas pressure monitor are both connected to the input end of the anti-explosion controller; When the flue damper is in a fully open state and the flue gas pressure is below the set value, the output signal of the explosion-proof controller is closed, and the boiler can be started normally; when the flue damper is in a non-fully open state and / or the flue gas pressure exceeds the set value, the output signal of the explosion-proof controller is disconnected, and the boiler cannot be started.

2. A boiler flue interlock protection device according to claim 1, characterized in that: The damper position monitor adopts a limit switch, and the limit switch is set at the fully open position of the flue damper.

3. A boiler flue interlock protection device according to claim 1, characterized in that: The flue gas pressure monitor adopts a pressure switch, and the pressure switch is arranged between the flue damper and the boiler.

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