Apparatus for treating waste ammonia gas from a gas nitriding furnace

Abstract

The utility model relates to waste gas treatment technical field, and disclose a kind of gas nitriding furnace waste ammonia gas treatment device, including water storage part, the cavity of storing water body is formed inside water storage part, and water storage part is fixedly connected with the gas inlet pipe for input gas and the gas guide pipe for discharging gas, the gas outlet end of the gas inlet pipe extends to the inside of cavity, and the horizontal height of the gas outlet end of the gas inlet pipe is lower than the horizontal height of the gas inlet end of gas guide pipe;The utility model sets up water storage part to build water body storage unit, waste gas is guided into water storage part inside using gas inlet pipe, so that the dust particles carried by waste gas are effectively intercepted by water medium when passing through water body, realize preliminary purification, waste gas after dust removal treatment is transported to heating element by gas guide pipe, carries out thermal decomposition reaction under high temperature environment, converts harmful substance into harmless component, avoids direct emission to cause pollution to atmospheric environment, not only reduce waste gas treatment energy consumption, simultaneously ensure that emission gas meets environmental protection standard.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to a device for treating waste ammonia gas from a gas nitriding furnace. Background Technology

[0002] Gas nitriding, a key technology for metal surface strengthening, utilizes the active nitrogen atoms generated from the high-temperature decomposition of ammonia to penetrate the workpiece surface and form a high-hardness nitrided layer. However, in actual production, the ammonia decomposition rate is typically only 80%-85%, resulting in 15%-20% undecomposed ammonia and trace amounts of dust (mainly composed of Fe3N, Fe4N, and other nitride particles) in the exhaust gas. Existing tunnel furnaces use a direct discharge method, directly releasing the exhaust gas into the external environment. However, this method easily causes environmental pollution, is detrimental to environmental protection, and results in unstable furnace pressure. Utility Model Content

[0003] This invention proposes a waste ammonia gas treatment device for a gas nitriding furnace to solve the problems of direct emission from existing devices, which easily causes environmental pollution and unstable furnace pressure.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a waste ammonia gas treatment device for a gas nitriding furnace, comprising a water storage component, wherein a cavity for storing water is formed inside the water storage component, and an inlet pipe for inputting gas and a guide pipe for discharging gas are fixedly connected to the water storage component. The outlet end of the inlet pipe extends into the cavity, the horizontal height of the outlet end of the inlet pipe is lower than the horizontal height of the inlet end of the guide pipe, and the outlet end of the inlet pipe is below the water surface. A heating element for heating gas is fixedly connected to the outlet end of the guide pipe.

[0005] Preferably, a heat exchange tube is fixedly connected inside the cavity, the heat exchange tube is located below the air inlet pipe, and both the air inlet end and the air outlet end of the heat exchange tube extend to the outside of the cavity, and the air outlet end of the heating element is connected to the air inlet end of the heat exchange tube.

[0006] Preferably, a one-way valve is fixedly connected between the air outlet end of the heating element and the air inlet end of the heat exchange tube.

[0007] Preferably, the heating element includes a heating furnace, a cover plate is rotatably connected to one side of the heating furnace, and a support is fixedly connected to the bottom of the heating furnace for supporting itself. The air inlet of the heating furnace is fixedly connected to a gas guide pipe, and an air outlet pipe for discharging gas is fixedly connected to the top of the heating furnace. The air outlet pipe is fixedly connected to a one-way valve.

[0008] Preferably, the water storage component includes a water storage tank, the air guide pipe and the air inlet pipe are both fixedly connected to the water storage tank, the top of the water storage tank is fixedly connected to a water filling pipe for adding water, the top of the water filling pipe is screwed with a detachable top cover, and the top of the top cover is fixedly connected to a handle.

[0009] Preferably, a drain pipe for discharging water is fixedly connected to one side of the water storage tank, and a valve is installed on the drain pipe.

[0010] The technical effects and advantages provided by this utility model in the above technical solution are as follows: (1) This application sets up a water storage unit to construct a water storage unit. The exhaust gas is introduced into the water storage unit through the air inlet pipe. When the exhaust gas passes through the water, the dust particles it carries are effectively intercepted by the water medium, thereby achieving preliminary purification. The exhaust gas after dust removal is transported to the heating element through the air guide pipe. It undergoes thermal decomposition reaction in a high-temperature environment, which can convert harmful substances into harmless components, thereby avoiding direct emission and pollution of the atmospheric environment. This not only reduces the energy consumption of exhaust gas treatment, but also ensures that the emitted gas meets environmental protection standards. The exhaust gas first enters the water storage unit. Compared with the direct emission in the prior art, the furnace pressure in this application is more stable.

[0011] (2) This application sets up an exhaust pipe and a heat exchange pipe. The high-temperature gas after decomposition is guided to the heat exchange pipe through the exhaust pipe and exchanges heat with the water in the water tank through the pipe wall, so that the water temperature is significantly increased. The recovered heat energy can be used to preheat the incoming waste gas or supply other process links, realize the cascade utilization of energy and reduce energy consumption costs.

[0012] (3) This application sets a one-way valve at the connection between the gas outlet pipe and the heat exchange pipe to restrict the airflow direction and ensure that the high-temperature gas can only flow in one direction along the preset path, effectively avoiding the backflow phenomenon, increasing the gas delivery speed, and reducing heat loss in the pipeline, further ensuring the stability and reliability of the heat exchange process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a perspective view of the heating element of this utility model; Figure 3 This is one of the perspective views of the water storage component of this utility model; Figure 4 This is the second perspective view of the water storage component of this utility model; Figure 5 This is a cross-sectional view of the water storage component of this utility model; In the diagram: 1. Heating element; 11. Support; 12. Heating furnace; 13. Cover plate; 14. Gas outlet pipe; 15. One-way valve; 2. Water storage component; 21. Water storage tank; 22. Water inlet pipe; 23. Top cover; 24. Handle; 25. Gas guide pipe; 26. Gas inlet pipe; 27. Heat exchanger pipe; 28. Drain pipe; 29. ​​Valve. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1-5 As shown, the waste ammonia gas treatment device for a gas nitriding furnace includes a water storage component 2. The water storage component 2 has a cavity for storing water. An inlet pipe 26 for inputting gas and a guide pipe 25 for discharging gas are fixedly connected to the water storage component 2. The outlet end of the inlet pipe 26 extends into the cavity. The horizontal height of the outlet end of the inlet pipe 26 is lower than the horizontal height of the inlet end of the guide pipe 25. The outlet end of the inlet pipe 26 is below the water surface. A heating element 1 for heating gas is fixedly connected to the outlet end of the guide pipe 25.

[0017] Through the above technical solution, when the gas nitriding furnace generates waste gas, it is connected to the air inlet pipe 26 on the water storage component 2 through a pipeline, and then water is added to the cavity inside the water storage component 2. After the gas nitriding furnace discharges waste gas, the waste gas is transported to the air inlet pipe 26 through the pipeline. The air inlet pipe 26 guides the waste gas to the cavity inside the water storage component 2. When the waste gas comes into contact with the water, the dust in the gas is removed. The dust-removed gas overflows from the water and is transported to the gas guide pipe 25. The dust-removed gas is discharged through the gas guide pipe 25 and transported to the heating element 1. The heating element 1 heats the gas, causing the gas to decompose and preventing the gas from being discharged into the outside environment and polluting the environment. The gas is discharged after being decomposed by heat, thereby improving the waste gas treatment efficiency and preventing the waste gas from being directly discharged into the outside environment and polluting the environment.

[0018] In order to utilize the heat generated when the device heats the gas, such as Figures 1-5 As shown, a heat exchange tube 27 is fixedly connected inside the cavity. The heat exchange tube 27 is located below the air inlet pipe 26, and both the air inlet and outlet ends of the heat exchange tube 27 extend to the outside of the cavity. The air outlet end of the heating element 1 is connected to the air inlet end of the heat exchange tube 27.

[0019] In this embodiment, when the heating element 1 heats the gas, decomposes it, and releases hot gas, the hot gas is transported to the heat exchange tube 27. When the hot gas passes through the heat exchange tube 27, it exchanges heat with the water inside the cavity, thereby raising the water temperature. After the water temperature rises, the hot water can be transported to other locations for use, avoiding the waste of heat resources caused by the direct discharge of hot gas to the outside.

[0020] In addition, in this invention, to avoid hot air backflow, such as Figures 1-5 As shown, a one-way valve 15 is fixedly connected between the outlet end of the heating element 1 and the inlet end of the heat exchange tube 27.

[0021] In this embodiment, when hot gas flows into the heat exchange tube 27, the one-way valve 15 is used to prevent hot gas backflow, thereby improving the efficiency of hot gas delivery and thus improving the efficiency of hot gas heating water.

[0022] Specifically, in one embodiment, regarding the heating element 1 described above, as... Figures 1-5 As shown, the heating element 1 includes a heating furnace 12. A cover plate 13 is rotatably connected to one side of the heating furnace 12, and a support 11 for supporting itself is fixedly connected to the bottom of the heating furnace 12. The air inlet of the heating furnace 12 is fixedly connected to the air guide pipe 25, and an air outlet pipe 14 for discharging gas is fixedly connected to the top of the heating furnace 12. The air outlet pipe 14 is fixedly connected to a one-way valve 15.

[0023] In this embodiment, gas is discharged through the gas guide pipe 25 and transported to the heating furnace 12. The heating furnace 12 heats the gas, causing it to decompose. The decomposed gas is then discharged through the gas outlet pipe 14, allowing the hot gas to be transported to the one-way valve 15. The one-way valve 15 then transports the hot gas to the heat exchange tube 27, which heats the water in the cavity. This utilizes the thermal resources of the hot gas and avoids direct emission of the hot gas.

[0024] Furthermore, in this utility model, regarding the aforementioned water storage component 2, as follows: Figure 1 , Figures 3-5 As shown, the water storage component 2 includes a water storage tank 21, an air guide pipe 25 and an air inlet pipe 26, all of which are fixedly connected to the water storage tank 21. A water addition pipe 22 for adding water is fixedly connected to the top of the water storage tank 21. A detachable top cover 23 is screwed onto the top of the water addition pipe 22. A handle 24 is fixedly connected to the top of the top cover 23.

[0025] In this embodiment, before the device is put into use, the top cover 23 is rotated by the handle 24 to separate the top cover 23 from the water inlet pipe 22. Water is then added into the water storage tank 21 through the water inlet pipe 22. After the water is added, the top cover 23 is placed on the water inlet pipe 22, and the top cover 23 is rotated to screw the top cover 23 and the water inlet pipe 22 together, thus completing the water addition. The gas can then be treated by the water.

[0026] To facilitate the drainage of water from the cavity, such as Figure 5 As shown, a drain pipe 28 for discharging water is fixedly connected to one side of the water storage tank 21, and a valve 29 is installed on the drain pipe 28.

[0027] In this embodiment, when water needs to be discharged, the valve 29 on the drain pipe 28 is opened, and the water inside the cavity can be discharged through the drain pipe 28, making the water readily available for use.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for treating waste ammonia gas from a gas nitriding furnace, characterized in that: The device includes a water storage component (2), which forms a cavity for storing water. An air inlet pipe (26) for inputting gas and an air guide pipe (25) for discharging gas are fixedly connected to the water storage component (2). The outlet end of the air inlet pipe (26) extends into the cavity. The horizontal height of the outlet end of the air inlet pipe (26) is lower than the horizontal height of the inlet end of the air guide pipe (25), and the outlet end of the air inlet pipe (26) is below the water surface. A heating element (1) for heating gas is fixedly connected to the outlet end of the air guide pipe (25).

2. The waste ammonia gas treatment device for a gas nitriding furnace according to claim 1, characterized in that: A heat exchange tube (27) is fixedly connected inside the cavity. The heat exchange tube (27) is located below the air inlet pipe (26), and both the air inlet end and the air outlet end of the heat exchange tube (27) extend to the outside of the cavity. The air outlet end of the heating element (1) is connected to the air inlet end of the heat exchange tube (27).

3. The waste ammonia gas treatment device for a gas nitriding furnace according to claim 2, characterized in that: A one-way valve (15) is fixedly connected between the outlet end of the heating element (1) and the inlet end of the heat exchange tube (27).

4. The waste ammonia gas treatment device for a gas nitriding furnace according to any one of claims 1-3, characterized in that: The heating element (1) includes a heating furnace (12), a cover plate (13) is rotatably connected to one side of the heating furnace (12), and a support (11) for supporting itself is fixedly connected to the bottom of the heating furnace (12). The air inlet of the heating furnace (12) is fixedly connected to the air guide pipe (25), and an air outlet pipe (14) for discharging gas is fixedly connected to the top of the heating furnace (12). The air outlet pipe (14) is fixedly connected to a one-way valve (15).

5. The waste ammonia gas treatment device for a gas nitriding furnace according to any one of claims 1-3, characterized in that: The water storage component (2) includes a water storage tank (21), the air guide pipe (25) and the air inlet pipe (26) are fixedly connected to the water storage tank (21), the top of the water storage tank (21) is fixedly connected to a water filling pipe (22) for adding water, the top of the water filling pipe (22) is screwed with a detachable top cover (23), and the top of the top cover (23) is fixedly connected to a handle (24).

6. The waste ammonia gas treatment device for a gas nitriding furnace according to claim 5, characterized in that: A drain pipe (28) for draining water is fixedly connected to one side of the water storage tank (21), and a valve (29) is installed on the drain pipe (28).

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