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CN-224212740-U - Liquid ammonia heat treatment device

CN224212740UCN 224212740 UCN224212740 UCN 224212740UCN-224212740-U

Abstract

The utility model relates to the technical field of liquid ammonia application, in particular to a liquid ammonia heat treatment device. The utility model provides a liquid ammonia heat treatment device which comprises an evaporator, a heat exchange mechanism, a connecting pipe fitting and a flow controller, wherein an air inlet end of the evaporator is communicated with a liquid ammonia tank for storing liquid ammonia, an air outlet end of the evaporator is communicated with one end of the connecting pipe fitting, and the other end of the connecting pipe fitting is communicated with an air inlet end of the flow controller. According to the utility model, through the arranged evaporator, the liquid ammonia in the liquid ammonia tank can be gasified basically completely, when the ambient temperature is low and part of liquid ammonia is not gasified, the liquid ammonia passes through the connecting pipe fitting, and the heat exchange mechanism arranged on the connecting pipe fitting can exchange heat with the liquid ammonia flowing in the connecting pipe fitting, so that the rest liquid ammonia is gasified completely, and further, no extra liquid ammonia enters the flow controller along the pipeline, the probability of failure and damage of the flow controller is reduced, and production is not delayed.

Inventors

  • CHENG MAYONG

Assignees

  • 江苏石川岛丰东真空技术有限公司

Dates

Publication Date
20260508
Application Date
20250507

Claims (10)

  1. 1. The liquid ammonia heat treatment device is characterized by comprising an evaporator (1), a heat exchange mechanism, a connecting pipe fitting (3) and a flow controller (4); The air inlet end of the evaporator (1) is communicated with a liquid ammonia tank (2) for storing liquid ammonia, the air outlet end of the evaporator is communicated with one end of the connecting pipe fitting (3), and the other end of the connecting pipe fitting (3) is communicated with the air inlet end of the flow controller (4); The connecting pipe fitting (3) is provided with a heat exchange mechanism for exchanging heat with liquid ammonia in the connecting pipe fitting (3).
  2. 2. A liquid ammonia heat treatment device according to claim 1, further comprising a muffle (5), the heat exchange mechanism comprising a heat exchange cartridge (6) and an exhaust gas combustion assembly; The air inlet end of the muffle furnace (5) is communicated with the air outlet end of the flow controller (4), and the air outlet end of the muffle furnace is provided with the waste gas combustion assembly which is used for combusting waste gas exhausted by the muffle furnace (5); The heat exchange tube (6) is provided with a heat exchange cavity, a first air inlet and a first air outlet which are communicated, the heat exchange cavity is used for gathering waste gas after combustion, and the connecting pipe fitting (3) is positioned in the heat exchange cavity.
  3. 3. A liquid ammonia heat treatment device according to claim 1, wherein the connecting tube (3) is a coil.
  4. 4. A liquid ammonia heat treatment device according to claim 2, wherein the exhaust gas combustion assembly comprises an exhaust pipe (7), a combustion cylinder (8) and an ignition member (9); the combustion cylinder (8) is provided with a flow guide cavity and a second air outlet which are communicated with each other; two ends of the exhaust pipe (7) are respectively communicated with the diversion cavity and the air outlet end of the muffle furnace (5); The first air inlet and the second air outlet are oppositely arranged; The ignition member (9) is arranged on one side of the combustion cylinder (8) and is used for burning the exhaust gas discharged by the combustion cylinder (8).
  5. 5. A liquid ammonia heat treatment device according to claim 4, wherein the combustion cylinder (8) comprises an outer cylinder (801) and an inner cylinder (802) sleeved in the outer cylinder (801); the inner diameter of the outer cylinder (801) is larger than the outer diameter of the inner cylinder (802); The outer cylinder (801) is provided with a first opening, the inner cylinder (802) is provided with a second opening, the direction of the first opening is opposite to that of the second opening, and the bottom wall of the inner cylinder (802) is connected to the first opening through a fixing piece; The exhaust pipe (7) is connected with one end of the outer cylinder (801) away from the first opening.
  6. 6. A liquid ammonia heat treatment device according to claim 5, wherein one side of the outer cylinder (801) is provided with an air line (11).
  7. 7. A liquid ammonia heat treatment device according to claim 5, wherein the ignition means (9) comprises an igniter (901), a shield (902) and a natural gas pipe (903); the protective cover (902) is fixedly arranged on one side of the outer cylinder (801) through a connecting piece; One end of the natural gas pipe (903) is connected in the protective cover (902), and the igniter (901) is used for igniting natural gas in the protective cover (902).
  8. 8. A liquid ammonia heat treatment device according to claim 7, wherein the ignition member (9) further comprises a detection head (904), one end of the detection head (904) protrudes out of the protective cover (902), and the detection head (904) is used for detecting whether flame exists at the opening of the protective cover (902).
  9. 9. A liquid ammonia heat treatment device according to claim 7, wherein the natural gas pipe (903) is provided with a one-way valve (905).
  10. 10. The liquid ammonia heat treatment device according to claim 6, wherein a collar (10) is arranged at the top end of the outer barrel (801), the collar (10) is communicated with the air pipeline (11), a plurality of through holes are formed in the collar (10), and the through holes are distributed around the axis direction of the collar (10).

Description

Liquid ammonia heat treatment device Technical Field The utility model relates to the technical field of liquid ammonia application, in particular to a liquid ammonia heat treatment device. Background The work piece is arranged in the muffle furnace, and the active nitrogen atoms decomposed out of the ammonia gas are led into the muffle furnace to permeate into the metal surface to form a nitriding layer with high hardness and strong corrosion resistance, but because gaseous ammonia is inconvenient to store and transport, liquid ammonia and an evaporator are generally purchased, and the liquid ammonia is gasified into gaseous ammonia and then led into the muffle furnace. Traditional liquid ammonia heat treatment device is including passing through liquid ammonia jar, evaporimeter, flow controller and the muffle furnace of pipe connection in proper order, and liquid ammonia passes through the evaporimeter effect and turns into gaseous ammonia and enters into the muffle furnace through flow controller and use. However, as the evaporator is affected by the ambient temperature, partial liquid ammonia is easy to be gasified in cold weather, and the liquid ammonia enters the flow controller along the pipeline, so that the flow controller is easy to be damaged by faults, and production is delayed, so that the production efficiency is lower. Disclosure of utility model The utility model solves the problem of how to fully gasify the liquid ammonia, and reduces the occurrence of production delay caused by failure damage of the liquid ammonia caused by flowing into a flow controller. (II) technical scheme The utility model provides a liquid ammonia heat treatment device, which comprises an evaporator, a heat exchange mechanism, a connecting pipe fitting and a flow controller, wherein the evaporator is connected with the heat exchange mechanism; the air inlet end of the evaporator is communicated with a liquid ammonia tank for storing liquid ammonia, the air outlet end of the evaporator is communicated with one end of the connecting pipe fitting, and the other end of the connecting pipe fitting is communicated with the air inlet end of the flow controller; the connecting pipe fitting is provided with a heat exchange mechanism for exchanging heat with liquid ammonia inside the connecting pipe fitting. According to one embodiment of the utility model, the liquid ammonia heat treatment device further comprises a muffle furnace, and the heat exchange mechanism comprises a heat exchange cylinder and an exhaust gas combustion assembly; The air inlet end of the muffle furnace is communicated with the air outlet end of the flow controller, the air outlet end of the muffle furnace is provided with the waste gas combustion assembly, and the waste gas combustion assembly is used for combusting waste gas discharged by the muffle furnace; The heat exchange tube is provided with a heat exchange cavity, a first air inlet and a first air outlet which are communicated, the heat exchange cavity is used for gathering waste gas after combustion, and the connecting pipe fitting is positioned in the heat exchange cavity. According to one embodiment of the utility model, the connecting tube is a coil. According to one embodiment of the present utility model, the exhaust gas combustion assembly includes an exhaust pipe, a combustion can, and an ignition member; the combustion cylinder is provided with a flow guide cavity and a second air outlet which are communicated with each other; Two ends of the exhaust pipe are respectively communicated with the flow guide cavity and the air outlet end of the muffle furnace; The first air inlet and the second air outlet are oppositely arranged; The ignition member is disposed at one side of the combustion cylinder for burning exhaust gas discharged from the combustion cylinder. According to one embodiment of the utility model, the combustion cylinder comprises an outer cylinder and an inner cylinder sleeved in the outer cylinder; the inner diameter of the outer cylinder is larger than the outer diameter of the inner cylinder; The outer cylinder is provided with a first opening, the inner cylinder is provided with a second opening, the direction of the first opening is opposite to that of the second opening, and the bottom wall of the inner cylinder is connected with the first opening through a fixing piece; the exhaust pipe is connected with one end of the outer cylinder far away from the first opening. According to one embodiment of the utility model, one side of the outer cylinder is provided with an air pipeline. According to one embodiment of the utility model, the ignition member comprises an igniter, a shield and a natural gas pipe; the protective cover is fixedly arranged on one side of the outer cylinder through a connecting piece; One end of the natural gas pipe is connected in the protective cover, and the igniter is used for igniting the natural gas in the protective cover. According to one em