Protection system of ammonium rhenate frozen crystallization ammonia gas detection instrument

Abstract

The utility model provides a protection system of an ammonium rhenate frozen crystallization ammonia gas detection instrument, which is arranged outside a refrigeration house and comprises an isolation cover, a detected gas automatic valve, a detected gas check valve, a replacement gas automatic valve, a detected gas manual valve, a replacement gas manual valve, a pipeline fan and a detection instrument, one side of the isolation cover is respectively provided with an exhaust pipeline and a gas supply pipeline which are communicated with the refrigeration house, the exhaust pipeline is provided with a detected gas check valve, and the gas supply pipeline is provided with a detected gas automatic valve, a detected gas hand valve, a pipeline fan and a gas supply pipeline. According to the utility model, the gas detection instrument is arranged outside the refrigeration house, detected gas is conveyed into the isolation cover through the pipeline for cyclic replacement when detection is needed, and air is introduced after detection to replace the detected gas in the isolation cover, so that the detection instrument is prevented from being exposed in the detected gas for a long time, and the service life of the instrument is prolonged; and meanwhile, the detection safety and convenience are also improved.

Description

Technical Field

[0001] The utility model belongs to the field of harmful gas detection instruments, and particularly relates to a protection system for an ammonium perrhenate freeze crystallization ammonia gas detection instrument. Background Art

[0002] In the production process of ammonium perrhenate, both the intermediate product filtrate and the finished product filtrate need to be placed in a cold storage for freeze crystallization. Before the start of daily production, the staff needs to enter the cold storage to take out the intermediate product filtrate and the finished product filtrate for the day's production. At the same time, after the completion of the day's production, the newly produced intermediate product filtrate and the finished product filtrate need to be put back into the cold storage for freeze crystallization to ensure subsequent production. According to the requirements of relevant documents, the cold storage belongs to a confined space, and fixed gas detection instruments need to be configured inside. The internal environment of the cold storage is humid, and in addition, the ammonia gas in the intermediate product filtrate and the finished product filtrate is volatile, resulting in a strong corrosive environment for electronic instruments inside the cold storage. At the same time, due to the accumulation of ammonia gas in the cold storage, the detection instrument is in a high alarm state for a long time, resulting in a high failure rate of the detection equipment and a high maintenance cost. On the other hand, it is difficult for personnel to manage and detect the confined space. Content of the Utility Model

[0003] Aiming at the defects that in the current production process of ammonium perrhenate, the gas detection instrument set in the cold storage is corroded by harmful gases, resulting in a high failure rate, and it is difficult to check inside the cold storage, the utility model provides a protection system for an ammonium perrhenate freeze crystallization ammonia gas detection instrument to ensure the safety of the detection instrument and improve the operation simplicity of the detection personnel.

[0004] The utility model is realized by the following technical solutions:

[0005] A protection system for an ammonium perrhenate freeze crystallization ammonia gas detection instrument is arranged outside the cold storage and includes an isolation cover, an automatic valve for the measured gas, a check valve for the measured gas, an automatic valve for the replacement gas, a manual valve for the measured gas, a manual valve for the replacement gas, a pipeline fan and a detection instrument;

[0006] The detection instrument is arranged inside the isolation cover;

[0007] One side of the isolation cover is respectively provided with an exhaust pipeline and a gas supply pipeline communicated with the cold storage;

[0008] A check valve for the measured gas is arranged on the exhaust pipeline; an automatic valve for the measured gas, a manual valve for the measured gas, a pipeline fan and a supplementary gas pipeline are arranged on the gas supply pipeline.

[0009] The working principle of the utility model is as follows:

[0010] The system of the present utility model sets the gas detection instrument for detecting gas outside the cold storage, and conducts ventilation detection through pipelines, which avoids the long-term corrosion of the detection instrument by harmful gases and thus plays a protective role. The detection personnel do not need to enter the cold storage to read data, improving the simplicity and safety of operation; the entire system is controlled by an automatic control system and is put into use after writing the control program. When detecting gas, the hand valve of the gas to be detected and the hand valve of the replacement gas are always open. By setting the program, the pipeline fan is automatically started, the automatic valve of the gas to be detected is opened, and the automatic valve of the replacement gas is closed, so that the gas in the isolation cover gradually circulates and replaces the gas inside the cold storage. When the output value of the detection instrument is stable for a period of time, the detection is completed and the program jumps to the replacement stage. In the replacement stage, the automatic valve of the gas to be detected is closed, the automatic valve of the replacement gas is opened, and the air gradually replaces the gas inside the isolation cover. When the output of the detection gas detection instrument drops to a lower value and is stable for a period of time, the automatic valve of the replacement gas and the pipeline fan are closed to avoid the detection instrument being exposed to the gas to be detected for a long time and extend the service life of the equipment.

[0011] Preferably, the isolation cover body is transparently provided.

[0012] The transparently provided isolation cover facilitates data reading.

[0013] Preferably, an opening is provided on the isolation cover body, and a protective cover is hinged to the opening.

[0014] The isolation cover body is provided with an opening for replacing the detection instrument.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] The system of the present utility model sets the gas detection instrument outside the cold storage. When detection is required, the gas to be detected is transported through pipelines to the isolation cover for cyclic replacement. After the detection is completed, air is introduced to replace the gas to be detected in the isolation cover, avoiding the detection instrument being exposed to the gas to be detected for a long time, improving the service life of the instrument, and at the same time avoiding the problem that the detection personnel need to enter the cold storage to read data, improving the safety and simplicity of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the connection framework diagram of the present utility model.

[0018] Reference numerals: 1 - isolation cover, 2 - automatic valve of the gas to be detected, 3 - check valve of the gas to be detected, 4 - automatic valve of the replacement gas, 5 - hand valve of the gas to be detected, 6 - hand valve of the replacement gas, 7 - pipeline fan, 8 - detection instrument, 9 - cold storage, 10 - exhaust pipeline, 11 - air supply pipeline, 12 - gas supply pipeline, 13 - protective cover. DETAILED DESCRIPTION OF THE INVENTION

[0019] The following further describes the present utility model in conjunction with the accompanying drawings. In the embodiments, unless otherwise specified, the technical means used are all conventional technical means in the art. Embodiment 1

[0020] As Figure 1 shown, a protection system for an ammonium rhenate freezing crystallization ammonia gas detection instrument is provided outside a cold storage 9, and includes an isolation cover 1, a measured gas automatic valve 2, a measured gas check valve 3, a replacement gas automatic valve 4, a measured gas manual valve 5, a replacement gas manual valve 6, a pipeline fan 7, and a detection instrument 8;

[0021] The detection instrument 8 is arranged inside the isolation cover 1;

[0022] One side of the isolation cover 1 is respectively provided with an exhaust pipeline 10 and a gas supply pipeline 12 communicating with the cold storage 9;

[0023] The exhaust pipeline 10 is provided with a measured gas check valve 3; the gas supply pipeline 12 is provided with a measured gas automatic valve 2, a measured gas manual valve 5, a pipeline fan 7, and a supplementary gas pipeline 11.

[0024] The working principle of this embodiment is as follows:

[0025] The detection instrument for detecting gas is arranged outside the cold storage, and ventilation detection is carried out through pipelines, which avoids the long-term corrosion of the detection instrument by harmful gases and thus plays a protective role. The detection personnel do not need to enter the cold storage to read data, improving the simplicity and safety of operation; the entire system is controlled by an automatic control system, and after writing the control program, it is put into use. When performing gas detection, the measured gas manual valve 5 and the replacement gas manual valve 6 are always open. By setting the program, the pipeline fan 7 is automatically started, the measured gas automatic valve 2 is opened, and the replacement gas automatic valve 4 is closed, so that the gas in the isolation cover 1 gradually circulates and replaces the gas inside the cold storage. When the value output by the detection instrument 8 is stable for a period of time, the detection is completed, and the program jumps to the replacement stage. In the replacement stage, the measured gas automatic valve 2 is closed, and the replacement gas automatic valve 4 is opened, so that the air gradually replaces the gas in the isolation cover 1. When the output of the detection gas detection instrument 8 drops to a lower value and is stable for a period of time, the replacement gas automatic valve 4 and the pipeline fan 7 are closed, avoiding the detection instrument being exposed to the measured gas for a long time and extending the service life of the equipment. Embodiment 2

[0026] This embodiment is a further improvement based on Embodiment 1, specifically as follows:

[0027] The main body of the isolation cover 1 is transparently arranged. An opening is provided on the main body of the isolation cover 1, and a protective cover 13 is hinged to the opening.

[0028] The working principle of this embodiment is the same as that of Embodiment 1. The transparent isolation cover 1 facilitates data reading; an opening is provided in the main body of the isolation cover 1 for replacing the detection instrument 8.

[0029] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A protection system for an ammonium rhenate freeze crystallization ammonia gas detection instrument, which is arranged outside a cold storage (9), and is characterized in that: It includes an isolation hood (1), a measured gas automatic valve (2), a measured gas check valve (3), a replacement gas automatic valve (4), a measured gas manual valve (5), a replacement gas manual valve (6), a pipeline fan (7) and a detection instrument (8); The detection instrument (8) is arranged inside the isolation hood (1); One side of the isolation hood (1) is respectively provided with an exhaust pipeline (10) and a gas supply pipeline (12) which communicate with a cold storage (9); A measured gas check valve (3) is arranged on the exhaust pipeline (10); a measured gas automatic valve (2), a measured gas manual valve (5), a pipeline fan (7) and a gas supplement pipeline (11) are arranged on the gas supply pipeline (12).

2. The protection system of the ammonium rhenate freeze crystallization ammonia gas detection instrument according to claim 1, characterized in that: The main body of the isolation hood (1) is transparently arranged.

3. The protection system of the ammonium rhenate freeze crystallization ammonia gas detection instrument according to claim 2, characterized in that: An opening is provided on the main body of the isolation hood (1), and a protective cover (13) is hinged to the opening.

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