CN-121141563-B - High-temperature ultraviolet ammonia monitoring device

CN121141563BCN 121141563 BCN121141563 BCN 121141563BCN-121141563-B

Abstract

The invention discloses a high-temperature ultraviolet ammonia gas monitoring device, which relates to the field of ammonia gas monitoring devices and comprises a machine case, wherein an air inlet pipe is arranged on the machine case, a detection box is arranged in the machine case, an air outlet pipe is also arranged on the machine case, an air inlet branch pipe is arranged on the right side of the detection box, an air outlet branch pipe is arranged on the left side of the detection box, the air outlet branch pipe is connected with the air outlet pipe, a sampling mechanism is used for independently sampling and sealing detected gas, the sampling mechanism is arranged in the detection box, and a channel switching mechanism is used for controlling the flowing direction of the gas. This high temperature ultraviolet ammonia monitoring devices adopts sampling mechanism, can realize the independent sample and the seal of dynamic gas to be surveyed to make the gas sample that is surveyed be in sealed space, both can avoid the air current turbulent flow to lead to the fact the influence to the accuracy of detection data, can avoid again leading to ammonia concentration dilution to produce detection error because of the gas flows, guarantee the accuracy of detection data.

Inventors

ZHANG JUNLONG
XU WEI
HUANG MING
OUYANG BO
ZHENG CHANGJUN
ZHOU YING
ZHU XIANGFEI
CAI YANG

Assignees

武汉敢为科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250909

Claims (5)

1. The high-temperature ultraviolet ammonia gas monitoring device comprises a case (1), wherein an air inlet pipe (2) is arranged on the case (1), a detection case (7) is arranged in the case (1), and an air outlet pipe (9) is also arranged on the case (1), and the high-temperature ultraviolet ammonia gas monitoring device is characterized in that an air inlet branch pipe (6) is arranged on the right side of the detection case (7), an air outlet branch pipe (8) is arranged on the left side of the detection case (7), and the air outlet branch pipe (8) is connected with the air outlet pipe (9); a sampling mechanism (10) for individually sampling and sealing the detected gas, the sampling mechanism (10) being installed in the detection box (7); The detection box (7) is fixedly provided with a chromatograph (701), the right opposite surface of the chromatograph (701) is provided with an ultraviolet light emitter (702) fixed on the detection box (7), the outer side of the detection box (7) is fixedly provided with a servo motor (703), the servo motor (703) is connected with a threaded rod (704) connected with a bearing in the detection box (7) in an interconnecting manner, the sampling mechanism (10) comprises two sampling boxes (1001) which are connected in the detection box (7) in a sliding manner, the two sampling boxes (1001) are mutually fixed through a fixing rod (1005), the bearings in the sampling boxes (1001) are connected with two sealing valve plates (1002), the sealing valve plates (1002) are matched with the inner round holes of the sampling boxes (1001) to realize sealing effect, the rotation angle of each time of the sealing valve plates (1002) is 90 DEG, transparent glass (1003) are fixed on the sealing valve plates (1002), a rotating shaft of the sealing valve plates (1002) is also fixedly provided with a gear (1004), the gear (1004) is arranged in the sampling boxes (1001), the fixing rod (1005) is connected with the sliding manner, the two sampling boxes (1006) in the sliding manner, the two sampling boxes (1006) are fixedly connected with a connecting plate (1008) and a connecting plate (1008) in a movable manner, the movable frame (1008) is fixedly provided with a convex rack (1009) and is in meshed connection with the gear (1004), the movable frame (1008) is also fixedly provided with a T-shaped plate (1010), and the T-shaped plate (1010) is in threaded connection with the threaded rod (704); and the channel switching mechanism (11) is used for controlling the flow direction of the gas, so that the gas flow position is always matched with the sampling mechanism (10) to be sampled to perform the sampling function, and the channel switching mechanism (11) is arranged in the detection box (7).
2. A high-temperature ultraviolet ammonia gas monitoring device according to claim 1 is characterized in that the air inlet pipe (2) is connected with an air pump (3) fixed in the case (1), the air pump (3) is connected with a dust remover (4) through a guide pipe, the dust remover (4) is connected with a tubular water cooler (5) through a guide pipe, and the tubular water cooler (5) is connected with an air inlet branch pipe (6) through a guide pipe.
3. A high temperature ultraviolet ammonia gas monitoring device as in claim 1 wherein the channel switching mechanism (11) comprises a guide rod (1101) in sliding connection with the detection box (7), a second spring (1102) is fixed between the guide rod (1101) and the detection box (7), and the guide rod (1101) is flush with a horizontal plate of the T-shaped plate (1010).
4. The high-temperature ultraviolet ammonia gas monitoring device according to claim 3, wherein the guide rod (1101) is further fixedly provided with a movable plate (1103), the movable plate (1103) is provided with an inclined groove (1104), the inclined groove (1104) is in sliding connection with the cross rod (1105), meanwhile, the cross rod (1105) is symmetrically fixed with a slide rod (1106) in a left-right direction, and the slide rod (1106) is in sliding connection with the detection box (7).
5. The high-temperature ultraviolet ammonia gas monitoring device according to claim 4, wherein the limiting block (1107) is fixed on the sliding rod (1106), the limiting block (1107) is in contact with the detection box (7) to achieve positioning, the sealing plate (1108) is also fixed on the sliding rod (1106), and meanwhile the sealing plate (1108) is matched with a side opening of the detection box (7) to achieve sealing effect.

Description

High-temperature ultraviolet ammonia monitoring device Technical Field The invention relates to the technical field of ammonia monitoring devices, in particular to a high-temperature ultraviolet ammonia monitoring device. Background Ammonia is a key gas in the processes of industrial denitration, urea synthesis and the like, and the processing is generally carried out in a high-temperature environment, so that the ammonia concentration in the environment needs to be monitored by an ammonia monitoring device in order to avoid the pollution of ammonia leakage to the environment; The existing ultraviolet ammonia monitoring device mainly utilizes ammonia molecules to have characteristic absorption peaks for ultraviolet light in a specific ultraviolet band (such as 190-230 nm), the concentration of the ultraviolet ammonia monitoring device can be calculated by analyzing the intensity change of an absorption spectrum, but when the existing ultraviolet ammonia monitoring device is actually used, external gas is sent into a detection device through a gas pump and other devices, the gas is in a flowing state in the device, the isolation of the detection gas cannot be realized, turbulent refraction or shaking of the ultraviolet light beam is possible due to the gas flowing, and therefore the accuracy of detection data is affected. Disclosure of Invention The invention aims to provide a high-temperature ultraviolet ammonia gas monitoring device so as to solve the problems in the background technology. In order to achieve the aim, the invention provides the technical scheme that the high-temperature ultraviolet ammonia monitoring device comprises a case, wherein an air inlet pipe is arranged on the case, a detection case is arranged in the case, an air outlet pipe is also arranged on the case, an air inlet branch pipe is arranged on the right side of the detection case, an air outlet branch pipe is arranged on the left side of the detection case, and the air outlet branch pipe is connected with the air outlet pipe; The sampling mechanism is used for independently sampling and sealing the detected gas and is arranged in the detection box; The channel switching mechanism is used for controlling the flowing direction of gas, so that the flowing position of the gas is always matched with the sampling mechanism to be sampled for sampling, and the channel switching mechanism is arranged in the detection box. Preferably, the air inlet pipe is connected with an air pump fixed in the case, the air pump is connected with the dust remover through a guide pipe, the dust remover is connected with a tubular water cooler through the guide pipe, the tubular water cooler is connected with an air inlet branch pipe through the guide pipe, and through the structure, the dust removal and the cooling effect of gas can be realized, so that the purity of the gas is ensured, and the follow-up detection is convenient. Preferably, the chromatograph is fixedly installed on the detection box, the ultraviolet light emitter fixed on the detection box is arranged on the opposite surface of the chromatograph, the servo motor is fixed on the outer side of the detection box, and meanwhile, the servo motor is connected with the bearing through the threaded rod in the detection box, so that ammonia in gas can be detected through the structure, and the ammonia content in the gas can be determined. Preferably, the sampling mechanism comprises two sampling boxes which are connected in the detection box in a sliding manner, the two sampling boxes are mutually fixed through a fixing rod, two sealing valve plates are connected with bearings in the sampling boxes, sealing effect can be achieved through matching of the sealing valve plates with round holes in the sampling boxes, each time the sealing valve plates rotate by 90 degrees, independent sampling and sealing of gas can be achieved through the structure, and therefore in the detection process, the gas is kept static, and the influence on the accuracy of detection data due to gas flowing is avoided. Preferably, transparent glass is fixed on the sealing valve plate, a gear is further fixed on the rotating shaft of the sealing valve plate, the gear is arranged in the sampling box, ultraviolet light can conveniently penetrate through a gas sample to be detected through the effect of the transparent glass, and accordingly normal detection is guaranteed. Preferably, the connecting plate is slidably connected to the fixing rod, the first springs are fixed between the connecting plate and the two sampling boxes, the connecting plate is fixedly connected with the movable frame, and meanwhile the movable frame is slidably connected with the sampling boxes. Preferably, the movable frame is fixedly provided with a convex rack, the convex rack is in meshed connection with the gear, the movable frame is fixedly provided with a T-shaped plate, the T-shaped plate is in threaded connection with the threaded rod, the movab