Air curtain type flue gas baffle device

Abstract

The utility model relates to an air curtain type flue gas baffle device which is characterized in that an air curtain frame and a baffle frame form a whole, and the wall of the frame is flush with the wall of a flue; the air curtain is fixed on the air curtain frame, and the whole air curtain frame is filled with the air curtain after the air curtain is inflated and expanded; the baffle is connected with the connecting rod and reciprocates in the track groove of the baffle frame under the push-pull action of the connecting rod; the air curtain is arranged in front of the baffle in the direction of smoke flow in the flue. The air curtain baffle door has the advantages that the baffle plate can be sealed by the air curtain capable of being inflated and deflated, and compared with a traditional baffle door, the baffle plate does reciprocating motion in the baffle plate frame, and a complex locking device is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke dampers, and more specifically, to an air curtain type smoke damper device. Background Art

[0002] In thermal power, steel, chemical, metallurgy, environmental protection and other industries, smoke dampers play the role of isolating smoke and are important equipment to ensure safe production and process system performance. Due to different process systems, smoke dampers are often installed in harsh environments such as high dust, high temperature, high moisture, and highly corrosive gases. They often become blocked, corroded, and deformed, which eventually cause equipment jams, smoke leaks, and other faults. This reduces the service life of the equipment, increases the workload of overhaul and maintenance of process system equipment, and increases unsafe factors in the process system.

[0003] In order to improve the sealing and corrosion resistance of the smoke damper, the traditional smoke damper often uses stainless steel or alloy sealing materials, and uses continuously blown sealing air as an auxiliary sealing means. Not only does the damper need to be equipped with expensive metal anti-corrosion materials, but the configured sealing air also consumes energy continuously, which is expensive, and the use and operation costs are high. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art and proposes an air curtain type smoke damper device, comprising: an air curtain unit and a damper unit; the air curtain unit comprises an air curtain and an air curtain frame; the damper unit comprises a damper, a damper frame and a connecting rod;

[0005] Among them, the air curtain frame and the baffle frame form a whole, and the frame wall is flush with the flue wall; the air curtain is fixed on the air curtain frame, and the air curtain fills the entire air curtain frame after inflation; the baffle is connected to the connecting rod, and the baffle moves back and forth in the track groove of the baffle frame through the pushing and pulling action of the connecting rod; facing the flue smoke flow direction, the air curtain is arranged in front of the baffle.

[0006] Preferably, an air nozzle is provided on the upper portion of the air curtain; the air nozzle is sealingly threadedly connected to the compressed air pipe through a sealing sleeve, and the sealing sleeve fixes the air nozzle and the air curtain to the air curtain frame.

[0007] Preferably, the end of the connecting rod is connected to a hydraulic, electric, pneumatic or manual drive structure to provide corresponding thrust and pull.

[0008] Preferably, the air curtain is made of rubber or polytetrafluoroethylene.

[0009] Preferably, one end of the compressed air pipe away from the air curtain is connected to the isolation valve.

[0010] Preferably, a pressure gauge is provided on the compressed air pipe.

[0011] The beneficial effects of the utility model are:

[0012] 1. Compared with the traditional baffle door, the baffle of the utility model reciprocates in the baffle frame, does not require a complex locking device, does not require high technical requirements for transmission and control, does not require high manufacturing precision of the baffle, and is easy to process and manufacture. The baffle seal is achieved by an inflatable and deflated air curtain, which can be made of organic anti-corrosion materials such as rubber or polytetrafluoroethylene, which has better anti-corrosion performance than stainless steel or alloy anti-corrosion materials and is cheaper.

[0013] 2. The air curtain in the baffle of the utility model is made of soft material, and after inflation, as the internal pressure increases, it can contact and press more closely with the air curtain frame. Even if the air curtain frame is deformed as the smoke temperature changes, the outer wall of the air curtain can automatically adjust under the action of the internal air pressure to ensure the close contact with the air curtain baffle. When the baffle is closed, the baffle provides support downstream of the air curtain, which can prevent the air curtain from moving and deforming under the smoke pressure and further improve the air tightness. When the traditional baffle door is in the closed state, continuous sealing air needs to be introduced to achieve sealing. In contrast, this device does not require sealing air and there is no additional energy consumption in the closed state.

[0014] 3. The utility model can determine whether there is a leak in the air curtain by observing and monitoring the changes in the pressure value of the pressure gauge on the compressed air pipe. If the air curtain is found to be leaking, the sealing sleeve can be loosened, the air curtain can be quickly removed from the air curtain frame, and a new air curtain can be quickly installed, which is very convenient for replacement. However, the traditional baffle door cannot directly determine whether the inner seal is leaking. The time to detect the smoke leak is relatively delayed, and a more obvious leak has already occurred, which will cause a greater safety risk to the process system equipment where the baffle is located. If there are corrosive components in the flue gas, it will also cause difficult-to-repair damage to the baffle itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a structural schematic diagram of an air curtain unit;

[0016] Figure 2 It is a structural schematic diagram of the air curtain type smoke damper device in a closed state;

[0017] Figure 3 is a schematic diagram of the structure of the baffle unit in a closed state;

[0018] Figure 4 It is a structural schematic diagram of the air curtain type smoke damper device in the open state;

[0019] Figure 5 is a schematic diagram of the structure of the baffle unit in an open state;

[0020] Explanation of the reference numerals: air curtain 1, baffle 2, baffle frame 3, air curtain frame 4, connecting rod 5, air nozzle 6, sealing sleeve 7, compressed air pipe 8, isolation valve 9, pressure gauge 10, track groove 11. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the embodiments. The description of the following embodiments is only used to help understand the utility model. It should be pointed out that for ordinary people in this technical field, the utility model can also be modified in some ways without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0022] Embodiment 1:

[0023] Embodiment 1 of the present application provides an air curtain type smoke damper device, such as Figure 1 As shown, it includes: an air curtain unit and a baffle unit; the air curtain unit includes an air curtain 1 and an air curtain frame 4; the baffle unit includes a baffle 2, a baffle frame 3 and a connecting rod 5;

[0024] Among them, the air curtain frame 4 and the baffle frame 3 form a whole, and the walls of the baffle frame 3 and the air curtain frame 4 are flush with the flue wall; the air curtain 1 is fixed on the air curtain frame 4, and the air curtain 1 fills the entire air curtain frame 4 after inflation; the baffle 2 is connected to the connecting rod 5, and the baffle 2 moves back and forth in the track groove 11 of the baffle frame 3 through the pushing and pulling action of the connecting rod 5; facing the direction of flue smoke flow, the air curtain 1 is arranged in front of the baffle 2.

[0025] Specifically, an air nozzle 6 is provided on the upper part of the air curtain 1, which is an integral and leak-free structure with the air curtain 1; the air nozzle 6 is sealed and threadedly connected to the compressed air pipe 8 through a sealing sleeve 7, and the sealing sleeve 7 fixes the air nozzle 6 and the air curtain 1 to the air curtain frame. When the air curtain 1 needs to be disassembled, the sealing sleeve 7 is loosened, and the air curtain 1 can be taken out of the air curtain frame 4 as a whole.

[0026] The end of the connecting rod 5 is connected to a hydraulic, electric, pneumatic or manual driving structure to provide corresponding thrust and pull.

[0027] The air curtain 1 is a hollow bag composed of a soft and strong film, and its material can be a light material such as rubber or polytetrafluoroethylene with high elasticity, corrosion resistance and structural strength. The end of the compressed air pipe 8 away from the air curtain 1 is connected to the isolation valve 9.

[0028] The compressed air pipe 8 is provided with a pressure gauge 10 .

[0029] Embodiment 2:

[0030] Based on Example 1, the present application embodiment provides a working method of an air curtain type smoke damper device, including:

[0031] Step 1: When the device needs to be in the off state, Figure 2 , Figure 3 As shown, the baffle 2 is completely inserted into the baffle frame 3, and the isolation valve 9 is opened, and the compressed air enters the air curtain 1 through the isolation valve 9 and the compressed air pipe 8; as the air pressure in the air curtain 1 increases, the air curtain 1 expands until the air curtain 1 is tightly attached to the inner wall of the air curtain frame 4 on all sides to meet the requirement of no leakage, at which time the compressed air pressure in the air curtain 1 is stopped from increasing, and the isolation valve 9 is closed.

[0032] In step 1, under the action of the flue gas pressure, the air curtain 1 and the baffle 2 are closely attached, which can further improve the isolation effect of the air curtain 1 on the flue gas, and can also prevent the flue gas from directly contacting the baffle 2, and avoid the corrosive gas components in the flue gas from causing material corrosion damage to the baffle 2. At the same time, the baffle 2 can also play a certain supporting role for the air curtain 1, preventing it from sliding and dislocation under the flue gas pressure.

[0033] The pressure shown on the pressure gauge 10 is the pressure value inside the air curtain 1. The inflation state of the air curtain 1 can be determined by the change in the pressure value. If the air pressure of the air curtain 1 drops to a certain set value, the air curtain 1 may be leaking, and the equipment should be repaired at an appropriate time.

[0034] Step 2: When the device needs to be in the open state, Figure 4 , Figure 5 As shown, the baffles 2 are all located on the upper part of the baffle frame 3, and the isolation valve 9 is opened, and the air in the air curtain 1 is extracted by the vacuum fan. At this time, the air curtain 1 shrinks, and the thickness of the air curtain 1 becomes thinner, and finally forms a film; under the action of the air pressure of the air flow in the flue, the film-like air curtain sticks to the upper part of the flue and serves as a sealing surface to prevent the smoke in the flue from leaking through the gap between the baffle 2 and the baffle frame 3.

[0035] Specifically, the method provided in this embodiment is a method corresponding to the device provided in Example 2. Therefore, the parts in this embodiment that are the same or similar to those in Example 2 can be referenced to each other and will not be repeated in this application.

Claims

1. The air curtain type smoke damper device is characterized by: include: An air curtain unit and a baffle unit; the air curtain unit comprises an air curtain (1) and an air curtain frame (4); the baffle unit comprises a baffle (2), a baffle frame (3) and a connecting rod (5); The air curtain frame (4) and the baffle frame (3) form a whole, and the frame wall is flush with the flue wall; the air curtain (1) is fixed on the air curtain frame (4), and the air curtain (1) fills the entire air curtain frame (4) after being inflated; the baffle (2) is connected to the connecting rod (5), and the baffle (2) moves back and forth in the track groove (11) of the baffle frame (3) through the push and pull action of the connecting rod (5); facing the flue gas flow direction, the air curtain (1) is arranged in front of the baffle (2).

2. The air curtain type smoke damper device according to claim 1, characterized in that: An air nozzle (6) is provided on the upper part of the air curtain (1); the air nozzle (6) is sealed and threadedly connected to a compressed air pipe (8) through a sealing sleeve (7), and the sealing sleeve (7) fixes the air nozzle (6) and the air curtain (1) on the air curtain frame.

3. The air curtain type smoke damper device according to claim 2, characterized in that: The end of the connecting rod (5) is connected to a hydraulic, electric, pneumatic or manual driving structure to provide corresponding thrust and pull.

4. The air curtain type smoke damper device according to claim 3, characterized in that: The air curtain (1) is made of rubber or polytetrafluoroethylene.

5. The air curtain type smoke damper device according to claim 4, characterized in that: One end of the compressed air pipe (8) away from the air curtain (1) is connected to an isolation valve (9).

6. The air curtain type smoke damper device according to claim 5, characterized in that: The compressed air pipe (8) is provided with a pressure gauge (10).

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