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CN-121208250-B - Detection method for tail gas generated in nitric acid production

CN121208250BCN 121208250 BCN121208250 BCN 121208250BCN-121208250-B

Abstract

The invention discloses a detection method of tail gas in nitric acid production, wherein a rotary drum is rotatably arranged at the top of a base, and a ring frame is fixedly connected to the surface of the rotary drum. According to the detection method for the tail gas in nitric acid production, the continuous rotation detection mechanism, the dehydration regeneration mechanism and the container acceleration replacement mechanism are arranged at the top of the base, so that the device can automatically and continuously switch the detection cylinder through the cooperative cooperation of the continuous rotation detection mechanism, the dehydration regeneration mechanism and the container acceleration replacement mechanism, further, the gas sample is continuously detected, dehumidification particles in the filler net frame are synchronously dried and regenerated in the detection process, good dehumidification performance of the dehumidification particles in the continuous use process is ensured, and the used detection cylinder is synchronously and rapidly replaced in the detection process, so that the device can be conveniently and continuously put into use in the subsequent automatic detection process on the basis of ensuring cleanliness.

Inventors

  • NING BENDE
  • GAO HONGTAO
  • ZHOU HAO
  • LIU HAIFENG
  • YANG LONG
  • ZHENG JISHUAI

Assignees

  • 安瑞森(宿迁)电子材料有限公司

Dates

Publication Date
20260512
Application Date
20250916

Claims (7)

  1. 1. The utility model provides a detection device of nitric acid production tail gas, its characterized in that the top of base (1) rotates and is provided with rotary drum (2), the fixed surface of rotary drum (2) is connected with ring frame (3), the surface of ring frame (3) is through seting up T type spout sliding connection and is had a plurality of detection section of thick bamboo (4), oxygen detection probe (5) and nitrogen dioxide detection probe (6) are installed respectively to the top and the bottom on the surface of detection section of thick bamboo (4), the top of base (1) is provided with continuous rotation detection mechanism (7), the top of base (1) is provided with dehydration regeneration mechanism (8) that use with continuous rotation detection mechanism (7) matches, the top of base (1) is provided with container and accelerates displacement mechanism (9); The continuous rotation detection mechanism (7) comprises a dislocation guide frame (701), the dislocation guide frame (701) is fixedly arranged at the top of the base (1), a guide roller (702) which is in sliding fit with the dislocation guide frame (701) is rotationally arranged on the surface of the detection cylinder (4), an electric telescopic rod (703) is fixedly connected to the top of the base (1), a plurality of arc-shaped guide grooves (704) are formed in the inner wall of the rotary cylinder (2) in a surrounding and equidistant mode, a storage cylinder (705) is fixedly connected to the surface of the extending end of the electric telescopic rod (703), a sliding block (706) is fixedly connected to the inside of the storage cylinder (705), a third reset spring (707) is fixedly connected between the sliding block (706) and the storage cylinder (705), an extrusion column (708) which is matched and matched with the arc-shaped guide grooves (704) is rotationally arranged on the surface of the sliding block (706), and a chute (709) is formed between every two adjacent arc-shaped guide grooves (704); The dehydration regeneration mechanism (8) comprises an air heater (801), the air heater (801) is fixedly arranged at the top of the base (1) through a support, a ventilation bin (802) is communicated with the outlet end of the air heater (801), a stand column (803) is fixedly connected to the top of the extending end of the electric telescopic rod (703), a perforated cross plate (804) is rotatably arranged on the surface of the stand column (803), a plurality of dehumidification cylinders (805) are fixedly connected to the surface of the perforated cross plate (804), a filler net frame (806) is arranged in the dehumidification cylinders (805), and a plurality of limiting stand columns (807) which are matched with the perforated cross plate (804) in a sliding mode are fixedly connected to the top of the ring frame (3) in an encircling equidistant mode; The container accelerating replacement mechanism (9) comprises a fan (901), the fan (901) is fixedly arranged at the top of a base (1), an outlet end of the fan (901) is communicated with an air outlet pipe (902), a telescopic pipe (903) matched with a detection cylinder (4) for use is arranged on the surface of the air outlet pipe (902) in a sliding mode, a vertical plate (904) is fixedly connected to the top of the base (1), a tooth rack (905) is arranged on one side of the vertical plate (904) in a sliding mode, a gear (906) meshed with the tooth rack (905) is arranged on one side of the vertical plate (904) in a rotating mode, a tooth plate (907) meshed with the gear (906) is fixedly connected to the front side of the telescopic pipe (903), and a lower pressing plate (908) matched with the tooth rack (905) in use is fixedly connected to the surface of a dehumidifying cylinder (805).
  2. 2. The detection device for tail gas in nitric acid production according to claim 1, wherein the top of the rotary drum (2) is provided with a plurality of control buttons (10) through a concave column, the surface of the upright column (803) is fixedly connected with a stop pressing plate (11), and the surface of the detection drum (4) is provided with an acousto-optic prompter (12) matched with the control buttons (10).
  3. 3. The device for detecting tail gas generated in nitric acid production according to claim 2, wherein one side of the telescopic tube (903) is fixedly connected with a limiting slide bar (13), and the surface of the air outlet tube (902) is fixedly connected with a limiting slide seat (14) which is in sliding fit with the limiting slide bar (13).
  4. 4. The device for detecting tail gas generated in nitric acid production according to claim 3, wherein a limit sliding groove (15) is formed in one side of the vertical plate (904), a limit sliding frame (16) is connected inside the limit sliding groove (15) in a sliding mode, a first reset spring (17) is fixedly connected between the limit sliding frame (16) and the limit sliding groove (15), and the top end of the limit sliding frame (16) is fixedly connected with the surface of the tooth rack (905).
  5. 5. The device for detecting tail gas in nitric acid production according to claim 4, wherein a ratchet wheel (18) is fixedly connected to the surface of the rotary drum (2), a sliding frame (19) is fixedly connected to the top of the base (1), a pawl (20) matched with the ratchet wheel (18) for use is slidingly connected to the sliding frame (19), and a second return spring (21) is arranged between the sliding frame (19) and the pawl (20).
  6. 6. The device for detecting tail gas from nitric acid production according to claim 5, wherein the top of the dehumidifying cylinder (805) is connected with an air inlet pipe joint (22) through screw threads.
  7. 7. A method for detecting tail gas from nitric acid production is characterized by adopting the device for detecting tail gas from nitric acid production according to claim 6, and comprises the following steps: Step one, detection and pre-drying, namely drying and dehumidifying the gas to be detected which is connected with the air inlet pipe joint (22) through the cooperation of a dehumidifying cylinder (805), a filler net frame (806) and dehumidifying particles in the filler net frame (806) in a dewatering regeneration mechanism (8), and introducing the dehumidified gas into the detection cylinder (4) for detection; step two, continuous rotation detection, namely, through intermittent operation of a continuous rotation detection mechanism (7) at the top of the base (1), a plurality of detection drums (4) are driven to rotate, so that each detection can use the detection drum (4) in a clean state as a detection container; step three, dehydration and regeneration, namely intermittently operating a continuous rotation detection mechanism (7) to synchronously butt-joint a used dehumidification cylinder (805) with a ventilation bin (802), and drying and regenerating dehumidification particles adsorbed with moisture in a filling net frame (806) in a standby state in the detection process; And fourthly, container acceleration replacement, namely, the detection cylinder (4) after the intermittent operation synchronous control detection of the continuous rotation detection mechanism (7) is in butt joint with the telescopic pipe (903) in the container acceleration replacement mechanism (9), so that the standby detection cylinder (4) can be actively subjected to air replacement during gas detection, and the influence on the subsequent continuous detection due to the existence of residues in the detection cylinder (4) is avoided.

Description

Detection method for tail gas generated in nitric acid production Technical Field The invention relates to the technical field of tail gas detection, in particular to a method for detecting tail gas in nitric acid production. Background The tail gas of nitric acid production contains nitrogen oxides with certain concentration, the nitrogen oxides pollute the atmosphere, in order to avoid that the nitrogen oxides exceed the emission standard, the gas is sampled and detected regularly, and the detection is required, a detection device is inevitably required to be used, the traditional detection device can only detect one gas sample, and the device can be put into use again after the detection is completed for a long time, so that the device is inconvenient to continuously detect the gas sample with high efficiency, and therefore, the detection method of the tail gas of nitric acid production is provided to solve the existing problems. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a method for detecting tail gas in nitric acid production, which solves the problem that a device is inconvenient to continuously and efficiently detect a gas sample. The invention aims to realize the aim by adopting the following technical scheme that the method for detecting the tail gas in nitric acid production specifically comprises the following steps: Step one, detecting pre-drying, namely drying and dehumidifying the gas to be detected which is connected to the air inlet pipe joint through the cooperation of a dehumidifying cylinder, a filling net frame and dehumidifying particles in the filling net frame in a dewatering and regenerating mechanism, and introducing the dehumidified gas into the detecting cylinder for detection; Step two, continuous rotation detection, namely, through intermittent operation of a continuous rotation detection mechanism at the top of the base, a plurality of detection cylinders are promoted to rotate in direction, so that a detection cylinder in a clean state can be used as a detection container for each detection; Step three, dehydration regeneration, namely intermittently operating a continuous rotation detection mechanism to synchronously butt-joint a used dehumidification cylinder with a ventilation bin, and drying and regenerating dehumidification particles adsorbed with moisture in a filling net frame in a standby state in the detection process; And fourthly, container acceleration replacement, namely, the detection cylinder after the intermittent operation synchronous control detection of the continuous rotation detection mechanism is in butt joint with the telescopic pipe in the container acceleration replacement mechanism, so that the standby detection cylinder can be actively replaced by air during gas detection, and the influence on the subsequent continuous detection use caused by residual inside the detection cylinder is avoided. Preferably, the top of base rotates and is provided with the rotary drum, the fixed surface of rotary drum is connected with the ring frame, the surface of ring frame has a plurality of detection section of thick bamboo through seting up T type spout sliding connection, oxygen detection probe and nitrogen dioxide detection probe are installed respectively to the top and the bottom on the surface of detection section of thick bamboo, the top of base is provided with continuous rotation detection mechanism, the top of base is provided with the dehydration regeneration mechanism that matches with continuous rotation detection mechanism and use, the top of base is provided with container and accelerates replacement mechanism. Preferably, the continuous rotation detection mechanism comprises a dislocation guide frame, the dislocation guide frame is fixedly arranged at the top of a base, the surface of a detection cylinder is rotationally provided with a guide roller which is matched with the dislocation guide frame in a sliding manner, the top of the base is fixedly connected with an electric telescopic rod, the inner wall of the rotary cylinder is surrounded by a plurality of arc guide grooves which are formed in an equidistant manner, a storage cylinder is fixedly connected with the surface of the extending end of the electric telescopic rod, a sliding block is connected inside the storage cylinder in a sliding manner, a third reset spring is fixedly connected between the sliding block and the storage cylinder, and an extrusion column matched with the arc guide grooves in use is rotationally arranged on the surface of the sliding block, and a chute is formed between every two adjacent arc guide grooves. Preferably, the dehydration regeneration mechanism comprises an air heater, the air heater is fixedly arranged at the top of the base through a bracket, the outlet end of the air heater is communicated with a ventilation bin, the top of the extension end of the electric telescopic rod is fixedly connected with a stand col