High temperature flue gas damper for incinerator

Abstract

The utility model belongs to incinerator flue gas regulating valve technical field, concretely relates to a kind of high-temperature flue gas regulating valve for incinerator, comprising: flue gas pipe, flue gas pipe inside swing connection has valve plate;Valve body, valve body is set to the outside of flue gas pipe;The both sides of valve body are respectively provided with valve motor and connector, the output shaft of valve motor and connector are all through flue gas pipe and are connected with valve plate;The inside of valve plate is provided with waterway, connector is communicated with waterway, connector is used for waterway to enter coolant;The utility model passes through setting waterway, makes cooling water to enter waterway and carries out heat exchange with valve plate, reduces valve plate temperature to avoid valve plate to be deformed by heat and block flue gas pipe, improves the service life of valve body.

Description

Technical Field

[0001] This utility model belongs to the technical field of flue gas regulating valves for incinerators, specifically relating to a high-temperature flue gas regulating valve for incinerators. Background Technology

[0002] In fields such as waste incineration and industrial waste treatment, the high-temperature flue gas generated by the incinerator needs to be controlled by regulating valves to ensure the stable operation of the incineration system and meet environmental protection requirements.

[0003] Currently, the valve plate of the existing high-temperature flue gas regulating valve, as the core component that directly contacts the high-temperature flue gas, lacks efficient cooling methods. Under high temperatures, the valve plate is prone to deformation due to thermal expansion, which can lead to a reduction in the gap between the valve plate and the inner wall of the flue gas pipe or even jamming, causing the regulating valve to malfunction. Moreover, the flue gas in the incinerator contains oxygen, water vapor, and acidic gases, and the outer side of the valve plate is prone to oxidation and corrosion under high-temperature conditions, thereby shortening the service life of the regulating valve. Utility Model Content

[0004] The purpose of this invention is to provide a high-temperature flue gas regulating valve for incinerators, which solves the technical problem that the valve plate of the regulating valve directly contacts the high-temperature flue gas and deforms due to thermal expansion, causing the valve plate to jam against the inner wall of the flue gas pipe and resulting in valve failure. The invention achieves efficient cooling of the valve plate, avoids valve plate deformation and blockage of the flue gas pipe, and improves the service life of the valve plate.

[0005] To solve the above-mentioned technical problems, this utility model provides a high-temperature flue gas regulating valve for an incinerator, comprising:

[0006] A flue pipe, wherein a valve plate is movably connected inside the flue pipe;

[0007] A valve body, which is sleeved on the outside of the flue gas pipe;

[0008] A valve motor and a connector are respectively provided on both sides of the valve body. The output shaft of the valve motor and the connector both pass through the flue pipe and are connected to the valve plate.

[0009] The valve plate has a water passage inside, and the connector is connected to the water passage. The connector is used to allow coolant to enter the water passage.

[0010] Furthermore, the valve motor is horizontally positioned, and its output shaft is coaxially connected to a main shaft;

[0011] The main shaft passes through the side wall of the flue gas pipe and the valve plate in sequence and then connects to the valve plate.

[0012] Furthermore, the outer wall of the valve plate is rotatably connected to the inner wall of the flue pipe;

[0013] A rotating shaft is provided inside the valve plate on the side away from the main shaft, and the rotating shaft is coaxial with the main shaft;

[0014] The rotating shaft passes through the flue pipe on the side near the joint, and the rotating shaft is rotatably connected to the flue pipe. The joint is located on the rotating shaft.

[0015] Furthermore, the connector is connected to the rotating shaft, and the rotating shaft is connected to the water passage;

[0016] The water inlet and outlet of the water passage are respectively connected to the water inlet and outlet of the connector;

[0017] The waterway is continuously curved.

[0018] Furthermore, the top of the valve plate is provided with multiple vent valves, all of which are connected to the water passage.

[0019] Furthermore, the valve body is detachably connected to the flue gas pipe via a flange.

[0020] Furthermore, both the valve plate and the main shaft are provided with a high-temperature resistant alloy layer.

[0021] The beneficial effects of this utility model are:

[0022] 1. This utility model sets up a water circuit and connects an external water pump and other water-passing mechanism through a connector, while simultaneously connecting an external carbon dioxide generator. The carbon dioxide generated by the carbon dioxide generator enters the water circuit along with the cooling water of the tank water mechanism through the connector. The cooling water flows in the water circuit and exchanges heat with the valve plate. At the same time, the liquid carbon dioxide rapidly vaporizes and undergoes a phase change in the high-temperature valve plate. Through the phase change endothermic effect, it absorbs a large amount of latent heat, significantly improving the cooling speed and depth, effectively inhibiting the valve plate from expanding and deforming due to heat, avoiding jamming, thereby preventing valve body failure and improving the service life of the valve body.

[0023] 2. By setting up a vent valve, this utility model addresses the issue that since the flue gas from the incinerator contains oxygen, water vapor, and acidic gases, the outer side of the valve plate is prone to oxidation and corrosion under high-temperature conditions. In this application, carbon dioxide in the cooling water absorbs heat and overflows from the vent valve. Because carbon dioxide is denser than air, it sinks and adheres tightly to the valve plate, forming a protective gas film that isolates oxygen from contacting the valve plate. This significantly slows down the oxidation rate of the valve plate, extends the maintenance cycle, and improves the overall service life of the regulating valve.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the structure of a high-temperature flue gas regulating valve for an incinerator according to the present invention;

[0027] Figure 2 yes Figure 1 A cross-sectional view;

[0028] Figure 3 yes Figure 1 The longitudinal section view.

[0029] In the picture:

[0030] 1. Flue pipe; 2. Valve body; 21. Valve motor; 22. Valve plate; 23. Vent valve; 24. Connector; 25. Water passage; 26. Flange; 27. Main shaft; 28. Rotary shaft. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Example 1:

[0033] like Figures 1 to 3 As shown, a high-temperature flue gas regulating valve for an incinerator includes: a flue gas pipe 1 and a valve body 2, the valve body 2 being sleeved on the outside of the flue gas pipe 1; the valve body 2 is detachably connected to the flue gas pipe 1 via a flange 26.

[0034] A valve plate 22 is movably connected inside the flue gas pipe 1. The outer wall of the valve plate 22 is rotatably connected to the inner wall of the flue gas pipe 1. When the valve plate 22 is horizontal, the flue gas pipe 1 is blocked by the valve plate 22, and the side wall of the valve plate 22 abuts against the inner wall of the flue gas pipe 1, preventing the flue gas from being discharged. When the valve plate 22 is rotated to a vertical position, the flue gas pipes 1 located on both sides of the valve plate 22 are opened, and the flue gas in the flue gas pipe 1 is discharged from the openings on both sides of the valve plate 22, thereby controlling the emission flow and pressure of the flue gas, ensuring the stable operation of the incineration system and meeting environmental protection requirements.

[0035] In this embodiment, a valve motor 21 and a connector 24 are respectively provided on both sides of the valve body 2. The output shaft of the valve motor 21 and the connector 24 both pass through the flue pipe 1 and are connected to the valve plate 22. The valve motor 21 can automatically start according to the pressure threshold or preset time in the flue pipe 1 by monitoring the pressure value inside the flue pipe 1 through an external control system. The valve motor 21 drives the valve plate 22 to rotate from horizontal to vertical, or drives the valve plate 22 to rotate from vertical to horizontal, thereby controlling the flue pipe 1 to open or close. The valve motor 21 opening the valve body 2, i.e. the valve plate 22, is a common technology in the field.

[0036] The valve motor 21 is located outside the flue gas pipe 1 and does not directly contact the high-temperature flue gas, which can significantly reduce the risk of motor failure caused by high temperature and extend the service life of the valve motor 21.

[0037] It should be noted that the valve motor 21 is set horizontally, and the axial direction of the valve motor 21 is perpendicular to the axial direction of the flue gas pipe 1. The output shaft of the valve motor 21 is coaxially connected to the main shaft 27. The main shaft 27 passes through the side wall of the flue gas pipe 1 and the side wall of the valve plate 22 in sequence and then connects to the valve plate 22. The valve motor 21 drives the main shaft 27 to rotate, thereby driving the valve plate 22 to rotate.

[0038] In addition, a water channel 55 is provided inside the valve plate 22. The water channel 55 is continuously curved and laid inside the valve plate 22, which increases the contact area between the water channel 55 and the inside of the valve plate 22 and improves the cooling efficiency of the valve plate 22.

[0039] In this embodiment, connector 24 is connected to water passage 55. The inlet and outlet of water passage 55 are connected to the inlet and outlet of connector 24, respectively. Connector 24 is used to introduce coolant into water passage 55. Connector 24 is externally connected to a water-passing mechanism and a carbon dioxide generator (both shown in the figure). The water-passing mechanism includes a water tank, water pump, water pipe, etc. Cooling water enters water passage 25 through connector 24 and the inlet of water passage 25 in sequence. Cooling water exchanges heat with valve plate 22. After heat exchange, the water flows out through water passage 25 and the outlet of connector 24 in sequence. Cooling water flows through connector 24 and water passage 25 once before flowing out of connector 24.

[0040] It should be noted that the carbon dioxide generator produces CO2 gas through an irreversible chemical reaction between strong acid and strong alkali. Because the reaction between the two materials is violent and endothermic, the process of releasing carbon dioxide is also endothermic, resulting in a low-temperature and high-pressure gas. The output end of the carbon dioxide generator is connected to the water pipe of the water supply mechanism. At the same time, the output end of the carbon dioxide generator is also equipped with a throttling and cooling device. The low-temperature carbon dioxide generated by the carbon dioxide generator through throttling and cooling enters the water circuit 25 along with the cooling water. The liquid carbon dioxide rapidly vaporizes and undergoes a phase change in the high-temperature valve plate 22 environment. Through the phase change endothermic effect, it absorbs a large amount of latent heat, significantly improving the cooling speed and depth, effectively suppressing the thermal expansion and deformation of the valve plate 22, and preventing jamming.

[0041] Example 2:

[0042] Based on Embodiment 1, a rotating shaft 28 is provided inside the valve plate 22 on the side away from the main shaft 27. The rotating shaft 28 is coaxial with the main shaft 27. The rotating shaft 28 passes through the flue gas pipe 1 on the side near the connector 24. The rotating shaft 28 is rotatably connected to the flue gas pipe 1. The connector 24 is located on the rotating shaft 28. The connector 24 is connected to the rotating shaft 28, and the rotating shaft 28 is connected to the water passage 55. The valve plate, in conjunction with the rotating support of the rotating shaft 28, has high transmission efficiency and can complete the opening and closing action in a short time, avoiding pressure fluctuations or equipment damage caused by adjustment lag.

[0043] Among them, the valve motor 21 drives the main shaft 27, which in turn drives the valve plate 22 to rotate. The valve plate 22 drives the rotating shaft 28 and the connector 24 to rotate. Since the valve motor 21 only drives the valve plate 22 to rotate 0 to 90°, and the connector 24 is connected to the water supply mechanism through the water pipe, the connector 24 rotates synchronously with the valve plate 22 and will not affect the water supply of the water circuit 25.

[0044] In addition, components such as valve plate 22 and main shaft 27 that come into direct contact with high-temperature flue gas are made of high-temperature alloy materials such as stainless steel and heat-resistant steel to ensure long-term stable operation in the high-temperature environment of the incinerator and avoid deformation, corrosion or failure caused by the material's lack of heat resistance.

[0045] Example 3:

[0046] Based on Embodiment 1, a plurality of vent valves 23 are provided at the top of the valve plate 22, and all of the vent valves 23 are connected to the water passage 55. In the prior art, at high temperatures, flue gas often carries water vapor, and the valve body 2 is in a high-temperature environment, which causes the oxidation rate of the outer side of the valve plate 22 to accelerate, the maintenance frequency to increase, and the life of the valve body 1 to decrease. In this application, carbon dioxide in the cooling water will overflow from the vent valves 23 after absorbing heat. Since carbon dioxide is denser than air, it will sink and stick to the outer side of the valve plate 22, forming a layer of "gas protective film" to isolate oxygen from contact with the valve plate 22, thereby significantly slowing down the oxidation rate of the valve plate 22, extending the maintenance cycle, and improving the overall service life of the valve body 1.

[0047] In summary, the flue gas pipe 1 continuously discharges high-temperature flue gas. When a certain pressure or time is reached, the valve motor 21 provides power to the main shaft 27 and, with the cooperation of the rotating shaft 28, drives the valve plate 22 to rotate, thus expelling the high-temperature flue gas. Cooling water is continuously circulated to the water circuit 25 through the connector 24, continuously cooling the valve plate 22 to reduce its deformation. At the same time, the cooling water inlet is connected to the carbon dioxide generator. The low-temperature carbon dioxide generated by the throttling cooling quickly cools the cooling water and enters the water circuit 25 along with the cooling water. The low-temperature cooling water enhances the cooling effect of the valve plate 22. Meanwhile, the carbon dioxide phase change absorbs heat, rapidly improving the cooling efficiency of the valve plate 22. After absorbing heat, the carbon dioxide in the cooling water overflows from the vent valve 23. Since the density of carbon dioxide is greater than that of air, it sinks and adheres tightly to the valve plate 22. Surrounded by carbon dioxide, the outer surface of the valve plate 22 has less contact with oxygen, thereby slowing down the oxidation rate, extending the maintenance cycle, and improving the life of the valve body 2.

[0048] All the devices selected in this application are general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0049] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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.

[0050] 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., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-temperature flue gas regulating valve for an incinerator, characterized in that, include: A flue (1) is provided, and a valve plate (22) is movably connected inside the flue (1). Valve body (2), the valve body (2) is sleeved on the outside of the flue gas pipe (1); A valve motor (21) and a connector (24) are respectively provided on both sides of the valve body (2). The output shaft of the valve motor (21) and the connector (24) both pass through the flue pipe (1) and are connected to the valve plate (22). The valve plate (22) has a water passage (55) inside, and the connector (24) is connected to the water passage (55). The connector (24) is used to allow coolant to pass through the water passage (55).

2. The high-temperature flue gas regulating valve for an incinerator as described in claim 1, characterized in that, The valve motor (21) is horizontally arranged, and the output shaft of the valve motor (21) is coaxially connected to the main shaft (27); The main shaft (27) passes through the side wall of the flue pipe (1) and the valve plate (22) in sequence and then connects to the valve plate (22).

3. A high-temperature flue gas regulating valve for an incinerator as described in claim 2, characterized in that, The outer wall of the valve plate (22) is rotatably connected to the inner wall of the flue pipe (1); A rotating shaft (28) is provided inside the valve plate (22) on the side away from the main shaft (27), and the rotating shaft (28) is coaxially arranged with the main shaft (27); The rotating shaft (28) passes through the flue pipe (1) on the side near the joint (24), the rotating shaft (28) is rotatably connected to the flue pipe (1), and the joint (24) is located on the rotating shaft (28).

4. A high-temperature flue gas regulating valve for an incinerator as described in claim 3, characterized in that, The connector (24) is connected to the rotating shaft (28), and the rotating shaft (28) is connected to the water passage (55); The inlet and outlet of the water passage (55) are respectively connected to the inlet and outlet of the connector (24); The waterway (55) is continuously curved.

5. A high-temperature flue gas regulating valve for an incinerator as described in claim 1, characterized in that, The valve plate (22) is provided with a plurality of vent valves (23) at its top end, and the plurality of vent valves (23) are all connected to the water passage (55).

6. A high-temperature flue gas regulating valve for an incinerator as described in claim 1, characterized in that, The valve body (2) is detachably connected to the flue gas pipe (1) via a flange (26).

7. A high-temperature flue gas regulating valve for an incinerator as described in claim 2, characterized in that, Both the valve plate (22) and the main shaft (27) are provided with a high-temperature resistant alloy layer.

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