Flammable and explosive gas dehumidification device

Abstract

The application discloses a flammable and explosive gas dehumidifying device, which comprises a mechanical expansion valve and a scroll refrigeration pipe; a low-pressure outlet of the mechanical expansion valve is connected with an air inlet of the scroll refrigeration pipe; a cold air outlet of the scroll refrigeration pipe outputs a to-be-detected gas; a free end of a capillary tube of the mechanical expansion valve is communicated with the to-be-detected gas output by the cold air outlet of the scroll refrigeration pipe; a temperature-sensing bubble of the mechanical expansion valve is used for detecting the to-be-detected gas output by the cold air outlet of the scroll refrigeration pipe; and a high-temperature inlet of the mechanical expansion valve is connected with flammable and explosive gas with high temperature and high humidity which needs to be treated. The flammable and explosive gas with high humidity generated by the device can be avoided, and the stable operation of a post-stage detection instrument is not affected.

Description

Technical Field

[0001] This invention belongs to the field of gas treatment and detection technology, and specifically relates to a dehumidification device for flammable and explosive gases. Background Technology

[0002] Hydrogen production equipment requires the detection of the produced gas, but the gas directly produced by the hydrogen production unit has high humidity, which is detrimental to the stable operation of the detection instruments. Therefore, the sampled gas needs to be dehumidified before being sent to the detection instruments. However, conventional adsorption dehumidification has limited dehumidification capacity and requires frequent replacement of the adsorbent; while electrically controlled dehumidification cannot be used for the treatment of such flammable and explosive gases.

[0003] This application relates to a mechanical dehumidification device for flammable and explosive gases. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a dehumidification device for flammable and explosive gases.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A flammable and explosive gas dehumidification device includes a mechanical expansion valve and a vortex refrigeration tube;

[0007] The low-pressure outlet of the mechanical expansion valve is connected to the inlet of the scroll refrigeration tube, and the cold gas outlet of the scroll refrigeration tube outputs the gas to be measured.

[0008] The free end of the capillary tube of the mechanical expansion valve is connected to the cold air outlet of the vortex refrigeration tube.

[0009] The temperature sensing bulb of the mechanical expansion valve is used to detect the gas to be tested output from the cold gas outlet of the scroll refrigerant tube.

[0010] The high-temperature inlet of the mechanical expansion valve is connected to a highly humid flammable and explosive gas.

[0011] Specifically, the high-temperature inlet of the mechanical expansion valve is connected to the high-temperature hydrogen produced by the hydrogen production equipment through a diversion connection.

[0012] Furthermore, the gas from the hot gas inlet of the vortex cooling tube is discharged into the air after passing through a flame-retardant device.

[0013] Furthermore, the hot gas inlet of the vortex refrigeration tube is also equipped with a one-way valve 6 to prevent gas backflow.

[0014] Furthermore, the hot gas inlet of the vortex cooling tube is equipped with a hot end silencer.

[0015] The hydrogen flow rate output by the hydrogen production equipment varies depending on the design scale. Generally, a portion of the hydrogen flow is diverted to obtain a sample, which is then dehumidified by this device before being sent to the detection instrument for analysis. This avoids the drawback of the hydrogen produced directly by the hydrogen production equipment having high humidity, which is not conducive to the stable operation of the detection instrument.

[0016] This device dehumidifies the hydrogen gas drawn from the hydrogen production equipment before sending it to the detection instrument for testing. This avoids the drawback of the high humidity of the hydrogen gas directly produced by the hydrogen production equipment, which would be detrimental to the stable operation of the detection instrument. It is suitable for dehumidifying most flammable and explosive gases. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 1 In the middle, 1-Mechanical expansion valve; 4-Scroll refrigerant tube; 5-Detection instrument; 6-One-way valve; 7-Flame arrester; 2-Capillary tube; 3-Temperature sensing bulb. Detailed Implementation

[0019] like Figure 1 As shown, a flammable and explosive gas dehumidification device includes a mechanical expansion valve 1 and a vortex refrigeration tube 4.

[0020] The low-pressure outlet of mechanical expansion valve 1 is connected to the inlet of scroll refrigeration tube 4, and the cold gas outlet of scroll refrigeration tube 4 outputs the gas to be measured.

[0021] The free end of the capillary tube 2 of the mechanical expansion valve 1 is connected to the cold air outlet of the vortex refrigeration tube 4.

[0022] The temperature sensing bulb 3 of the mechanical expansion valve 1 is used to detect the gas to be tested output from the cold gas port of the vortex refrigeration tube 4.

[0023] The high-temperature inlet of mechanical expansion valve 1 is connected to the high-temperature and high-humidity flammable and explosive gas that needs to be treated.

[0024] In one embodiment, the high-temperature inlet of the mechanical expansion valve 1 is connected to the high-temperature hydrogen produced by the hydrogen production equipment via a diversion connection.

[0025] In one embodiment, the gas from the hot gas inlet of the vortex cooling tube 4 is discharged into the air after passing through a flame-retardant device.

[0026] In one embodiment, the hot gas port of the vortex cooling tube 4 is also provided with a one-way valve 6 to prevent gas backflow.

[0027] In one embodiment, a hot-end silencer is installed at the hot gas port of the vortex cooling tube 4.

[0028] The hydrogen flow rate output by the hydrogen production equipment varies depending on the design scale. Generally, a portion of the hydrogen flow is diverted to obtain a sample, which is then dehumidified by this device before being sent to the detection instrument 5 for testing. This avoids the drawback of the hydrogen produced directly by the hydrogen production equipment having high humidity, which would hinder the stable operation of the detection instrument 5.

[0029] Working Mechanism: The core of this device is the vortex refrigeration tube 4 (referred to as the vortex tube). Its principle is that after high-pressure gas enters the vortex tube, it undergoes internal vortex exchange, resulting in the output of one high-temperature gas and one low-temperature gas. As the temperature decreases, condensation occurs in the water-containing gas. After water vapor separation, the gas's water content drops significantly. In the low-temperature gas channel, water vapor condensation can cause blockages due to the low temperature of the cooled gas, leading to malfunctions.

[0030] The mechanical expansion valve in this device, or simply the expansion valve, works as follows: when the capillary tube (with a temperature-sensing bulb at the free end) detects a low temperature, the expansion valve reduces its opening, decreasing the flow rate. This reduces the inlet flow rate of the subsequent vortex tube, raising the cold-end temperature. Conversely, when the capillary tube (temperature-sensing bulb) detects a high temperature, the expansion valve increases its opening, increasing the flow rate. This increases the inlet flow rate of the subsequent vortex tube, lowering the cold-end temperature. By adjusting the internal bolts of the expansion valve, the final outlet temperature can be stabilized within a certain range. This prevents the vortex tube from freezing and clogging, ensuring maximum dehumidification efficiency.

[0031] Figure 1 In the image, the arrow indicates the direction of airflow.

[0032] In this embodiment, both the mechanical expansion valve 1 and the vortex refrigeration tube 4 are non-electronic products and will not pose a danger to the handling of flammable and explosive gases.

[0033] When the mechanical expansion valve is replaced by an electronic expansion valve, this device can also be used for dehumidification of non-flammable and non-explosive gases.

[0034] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dehumidification device for flammable and explosive gases, characterized in that: Including mechanical expansion valves and scroll refrigerant tubes; The low-pressure outlet of the mechanical expansion valve is connected to the inlet of the scroll refrigeration tube, and the cold gas outlet of the scroll refrigeration tube outputs the gas to be measured. The free end of the capillary tube of the mechanical expansion valve is connected to the cold air outlet of the vortex refrigeration tube. The temperature sensing bulb of the mechanical expansion valve is used to detect the gas to be tested output from the cold gas outlet of the vortex refrigeration tube. The high-temperature inlet of the mechanical expansion valve is connected to a highly humid flammable and explosive gas.

2. The flammable and explosive gas dehumidification device according to claim 1, characterized in that: The gas from the hot gas inlet of the vortex refrigeration tube is discharged into the air after passing through a flame-retardant device.

3. The flammable and explosive gas dehumidification device according to claim 1, characterized in that: The hot gas inlet of the vortex refrigeration tube is also equipped with a one-way valve to prevent gas backflow.

4. The flammable and explosive gas dehumidification device according to claim 1, characterized in that: A hot-end silencer can also be installed at the hot gas inlet of the vortex refrigeration tube.

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