CN210874737U - Gaseous clean system of chromatograph - Google Patents
Gaseous clean system of chromatograph Download PDFInfo
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- CN210874737U CN210874737U CN201921278133.XU CN201921278133U CN210874737U CN 210874737 U CN210874737 U CN 210874737U CN 201921278133 U CN201921278133 U CN 201921278133U CN 210874737 U CN210874737 U CN 210874737U
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- dehumidifier
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Abstract
The utility model provides a gaseous clean system of chromatograph. The utility model provides a gaseous clean system of chromatograph, is including the air pump, mechanical filtration dehydrating unit, automatic activation dehumidifier, tee bend solenoid valve, gas holder and the back level purge tube that connect gradually, the gas holder is used for storing and compressed gas, automatic activation dehumidifier exit be equipped with humidity transducer, humidity transducer is used for detecting the gas humidity at purge tube exit, automatic activation dehumidifier in be equipped with heating rod and adsorbent. The utility model discloses a humidity transducer, real-time supervision gas humidity, when humidity is less than the predetermined value, launches adsorbent dehumidification procedure, and it is qualified to guarantee to admit air humidity, does not need often to change the adsorbent.
Description
Technical Field
The utility model relates to a gas chromatograph online analysis technical field, more specifically relates to a gaseous clean system of chromatograph.
Background
The chromatograph requires pure air as an auxiliary gas when operating. The air is generally supplied by an air compressor after being purified. The compressed air produced by the compressor is impure because the air compressor itself contains lubricating oil and when compression is performed, some lubricating oil must be mixed into the compressed air. In addition, natural air contains solid particles, moisture and the like, and untreated air is easy to cause gas path pollution or unstable baseline when used for a chromatograph. The air output from the compressor must therefore be purified and filtered. Air purification usually achieves output purification of air through multi-stage filtration. The first stage of purification is typically a mechanical dehumidifier that uses stainless steel mesh filters to redirect water and air so that the individual droplets combine and condense in a coalescer. The water drops grow larger and flow into the water storage chamber under the action of gravity after being combined with other pollutants and are discharged through the automatic drain valve. This process removes a large amount of water. The remaining water needs to be adsorbed by a purification pipe. For example, the micro-moisture in the air is removed by adopting a purifying tube filled with allochroic silica gel. Meanwhile, other types of trace impurities are removed by using a molecular sieve, activated carbon and the like.
The purification tube of the existing purification device is filled with the adsorbent once, and the adsorbent is replaced regularly after being saturated by the dehumidifying adsorbent, and the replacement of the adsorbent can be determined only by manual observation. Some do not change the adsorbent in time, resulting in poor dehumidification effect, influence the experimental result.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome among the above-mentioned background art dehumidification adsorbent carry out periodic replacement after saturating, can only confirm the change of adsorbent through manual observation. Some do not change the adsorbent in time, lead to the dehumidification effect poor, influence the problem of experimental result, provide a chromatograph gas purification system. The utility model discloses a humidity transducer, real-time supervision gas humidity, when humidity is less than the predetermined value, launches adsorbent dehumidification procedure, and it is qualified to guarantee to admit air humidity, does not need often to change the adsorbent.
In order to solve the technical problem, the utility model discloses a technical scheme is: the device comprises an air pump, a three-way electromagnetic valve, an air storage tank and an impurity removal device, wherein the impurity removal device comprises an automatic activation dehumidifier, and the air pump, the automatic activation dehumidifier, a three-way valve and the air storage tank are sequentially connected; a humidity sensor is arranged at an outlet of the automatic activation dehumidifier, and a heating rod and an adsorbent are arranged in the automatic activation dehumidifier. Like this, be provided with heating rod and adsorbent in the automatic activation dehumidifier, the moisture in the automatic adsorbed gas of adsorbent dehumidifies, and when the adsorbent is saturated, can utilize the moisture evaporation in the heating rod with the adsorbent, the activity of reply adsorbent to need not often change the adsorbent.
Furthermore, the impurity removing device also comprises a mechanical filtering and dehumidifying device and a rear-stage purifying pipe, wherein one end of the mechanical filtering and dehumidifying device is connected with the air pump, and the other end of the mechanical filtering and dehumidifying device is connected with the automatic activation dehumidifier; one end of the rear-stage purifying pipe is connected with the outlet of the gas storage tank, and the other end of the rear-stage purifying pipe is a gas outlet of the chromatograph gas purifying system. Therefore, in the whole system, the gas is dehumidified or purified for three times, the discharged gas is purer, and the humidity meets the standard.
Furthermore, the three-way valve is a three-way electromagnetic valve, a first passage of the three-way electromagnetic valve is connected with an outlet of the automatic activation dehumidification pipe, a second passage of the three-way electromagnetic valve is connected with the gas storage tank, and a third passage of the three-way electromagnetic valve is in idle connection. Thus, when the value detected by the humidity sensor is lower than a certain threshold value, the three-way electromagnetic valve controls the first passage to be communicated with the second passage, the third passage is closed, the activity ratio of the adsorbent is higher, the operation is normal, and the dehumidified and purified gas is discharged into the gas storage tank; when the detected value of the humidity sensor is higher than a certain threshold value, the activity of the adsorbent is not high, the adsorbent works abnormally, the three-way electromagnetic valve controls the first passage to be communicated with the third passage, the second passage is closed, then the heating rod in the automatic activation purifier is started to work, the moisture in the adsorbent is evaporated, and the adsorbent is discharged through the third passage.
Furthermore, the automatic activation dehumidifier comprises a purification pipe body, a gas inlet, a gas outlet, an over-temperature protector and a power supply ferrule connector; the gas outlet with the power supply cutting ferrule connects and is located respectively purify the both ends of body, gas inlet is located purify the body and be close to on the lateral wall that the power supply cutting ferrule connects, the adsorbent fill in the purification body, the heating rod is inserted and is established in the adsorbent, the heating rod is connected the power supply cutting ferrule connects, the overtemperature prote ware is established on the lateral wall of purification body. Like this, the adsorbent of filling in the automatic activation dehumidifier can be by oneself absorb moisture, plays the function of automatic dehumidification, and the heating rod is connected the power and is used for heating the dehumidification, and the effect of overtemperature prote ware is the temperature that detects the purification body to ensure that the temperature of heating rod is at the certain limit, protect the stability of whole device.
Further, the default protection temperature set by the over-temperature protector is 120 ℃. Therefore, the protection temperature is set to be 120 ℃, moisture can be quickly evaporated, and the 120 ℃ can not damage the adsorbent, so that the service life of the whole device system is prolonged.
Furthermore, the adsorbent is a silica gel adsorbent and is used for absorbing moisture in the gas. Thus, the silica gel has better water absorption and higher water absorption saturation.
Furthermore, the rear-stage purification tube is filled with an activated carbon molecular sieve, and an outlet of the rear-stage purification tube is provided with a pressure stabilizing valve for adjusting output pressure. Therefore, the activated carbon molecular sieve is arranged in the rear-stage purification pipe and is used for further removing trace impurities in the gas, so that the finally discharged gas is purer; the stability of gas output can be guaranteed in the setting of surge damping valve, the safety of whole device is protected.
Further, the heating rod is a fin-shaped heating rod. Thus, the heating effect is more uniform and the efficiency is higher.
Compared with the prior art, the beneficial effects are:
1. whole flow is through the cubic dehumidification or purify for the gas purity of purification is higher, is provided with heating rod and adsorbent in the main automatic activation dehumidifier, and the moisture in the adsorbent automatic adsorbed gas dehumidifies, when the adsorbent is saturated, can utilize the moisture evaporation in the heating rod with the adsorbent, resumes the activity of adsorbent, thereby need not often change the adsorbent.
2. The arrangement of the over-temperature protector and the pressure stabilizing valve ensures the use safety of the system and prolongs the service life.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic diagram of the overall structure of the automatic dehumidifier of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limiting the present patent, and those skilled in the art will understand the specific meaning of the terms according to their specific circumstances.
The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:
as shown in fig. 1, a gaseous clean system of chromatograph, including air pump 1, mechanical filtration dehydrating unit 2, automatic activation dehumidifier 3, three way solenoid valve 5, gas holder 6 and the back level purge tube 7 that connect gradually, gas holder 6 is used for storing and compressed gas, 3 exits of automatic activation dehumidifier be equipped with humidity transducer 4, humidity transducer 4 is used for detecting the gas humidity of purge tube exit, automatic activation dehumidifier in be equipped with heating rod and silica gel adsorbent. The first path of the three-way electromagnetic valve 5 is connected with the outlet of the automatic activation dehumidifier, the second path of the three-way electromagnetic valve 5 is connected with the gas storage tank 6, and the third path of the three-way electromagnetic valve 5 is in idle connection. Thus, when the value detected by the humidity sensor 4 is lower than a certain threshold value, the three-way electromagnetic valve 5 controls the first passage to be communicated with the second passage, and the third passage is closed, which indicates that the activity ratio of the silica gel adsorbent 36 is higher, the operation is normal, and the dehumidified and purified gas is discharged into the gas storage tank 6; when the detected numerical value of the humidity sensor 4 is higher than a certain threshold value, the activity of the silica gel adsorbent is not high, the operation is abnormal, the three-way electromagnetic valve 5 controls the first passage to be communicated with the third passage, the second passage is closed, then the heating rod in the automatic activation purifier 3 is started to work, the moisture in the silica gel adsorbent is evaporated, and the silica gel adsorbent is discharged through the third passage.
As shown in fig. 2, the automatic dehumidifier in this embodiment includes a purifying pipe 32, a gas inlet 37, a gas outlet 31, a temperature sensor 34, an over-temperature protector 35, and a power ferrule adapter 38; gas outlet 31 with power supply ferrule connects 38 and is located respectively purify the both ends of body 32, gas inlet 31 is located purify the body 32 and be close to on power supply ferrule connects 38's the lateral wall, heating rod 33 establishes the inner core at purifying body 32, the heating rod is connected power supply ferrule connects 38, silica gel adsorbent 36 fill in the purifying body, over-temperature protector 34 and temperature sensor 34 establish at purifying body outer wall. Like this, adsorbent 36 that fills in the automatic activation dehumidifier 3 can independently absorb moisture, plays the function of automatic dehumidification, and heating rod 33 connects the power and is used for heating dehumidification, and the effect of overtemperature prote ware 35 is the temperature of guaranteeing heating rod 33 at certain extent, protects the stability of whole device.
As shown in fig. 2, the over-temperature protector 35 sets the default protection temperature to 120 ℃. Therefore, the protection temperature is set to be 120 ℃, moisture can be quickly evaporated, and the silica gel adsorbent 36 cannot be damaged by 120 ℃, so that the service life of the whole device system is prolonged. The rear-stage purification tube 7 is filled with an activated carbon molecular sieve, and the outlet of the rear-stage purification tube 7 is provided with a pressure stabilizing valve 8 for adjusting output pressure. Thus, an activated carbon molecular sieve is arranged in the rear-stage purification pipe 7 and is used for further removing trace impurities in the gas, so that the finally discharged gas is purer; the arrangement of the pressure stabilizing valve 8 can ensure the stability of gas output and protect the safety of the whole device. The heating rod 33 is a fin-shaped heating rod. Thus, the heating effect is more uniform and the efficiency is higher.
During operation, as shown in fig. 1 and 2, gas enters from the gas pump 1, firstly passes through the mechanical filtering and dehumidifying device 2 to perform primary filtering and dehumidifying, then passes through the automatic activation dehumidifier 3 to perform a second-step deep filtering and dehumidifying, at this time, moisture in the gas is basically removed, and then enters the gas storage tank 6, the gas storage tank 6 stores and compresses the gas, and the gas is introduced into the rear-stage purification pipe 7, substances such as a carbon molecular sieve and the like arranged in the rear-stage purification pipe 7 are used for further removing trace impurities in the air, and a pressure stabilizing valve 8 is connected behind the gas storage tank to ensure the stability of output pressure, the gas is discharged through the stabilizing valve 8, and the whole flow is dehumidified or purified for three times, so that the purity of the purified gas is higher. Be provided with heating rod 33 and silica gel adsorbent 36 in the main automatic activation dehumidifier 3, the moisture in the automatic adsorbed gas of silica gel adsorbent 36 dehumidifies, has the adsorption to the gas through automatic activation dehumidifier 3 when silica gel adsorbent 36 is unsaturated, the moisture in the absorbed gas that can last. The humidity of the output gas from the outlet is maintained at a certain value. When the silica gel adsorbent 36 is saturated, the capacity of absorbing water is reduced, and the humidity of the gas output from the outlet of the automatic activation dehumidifier exceeds a set value. When the humidity sensor 4 continuously detects an output set value, an adsorbent dehumidification program is triggered, the three-way electromagnetic valve 5 is switched to evacuation after the dehumidification program is started, the heating rod 33 is slowly heated at 5 ℃ per minute under the control of the program, and at the moment, the compressor is started to continuously work. Moisture escaping from the silica gel adsorbent 36 after heating was discharged to the outside, and the heating temperature finally stabilized to be set to 120 c for 10 minutes. Or until moisture detector 4 detects that the moisture is less than the set point. The dehumidification process is started in the working clearance of the compressor, the water in the adsorbent is evaporated by the heating rod 33, and the activity of the silica gel adsorbent 36 is recovered, so that the silica gel adsorbent 36 does not need to be replaced frequently.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. A chromatograph gas purification system is characterized in that: the device comprises an air pump, a three-way valve, an air storage tank and an impurity removal device, wherein the impurity removal device comprises an automatic activation dehumidifier, and the air pump, the automatic activation dehumidifier, the three-way electromagnetic valve and the air storage tank are sequentially connected; a humidity sensor is arranged at an outlet of the automatic activation dehumidifier, and a heating rod and an adsorbent are arranged in the automatic activation dehumidifier.
2. The chromatograph gas purification system of claim 1, wherein: the impurity removing device also comprises a mechanical filtering and dehumidifying device and a rear-stage purifying pipe, one end of the mechanical filtering and dehumidifying device is connected with the air pump, and the other end of the mechanical filtering and dehumidifying device is connected with the automatic activation dehumidifier; one end of the rear-stage purifying pipe is connected with the outlet of the gas storage tank, and the other end of the rear-stage purifying pipe is a gas outlet of the chromatograph gas purifying system.
3. The chromatograph gas purification system of claim 2, wherein: the three-way valve is a three-way electromagnetic valve, a first passage of the three-way electromagnetic valve is connected with an outlet of the automatic activation dehumidification pipe, a second passage of the three-way electromagnetic valve is connected with the gas storage tank, and a third passage of the three-way electromagnetic valve is in idle connection.
4. The chromatograph gas purification system of claim 3, wherein: the automatic activation dehumidifier comprises a purification pipe body, a gas inlet, a gas outlet, an over-temperature protector and a power supply ferrule connector; the gas outlet with the power supply cutting ferrule connects and is located respectively purify the both ends of body, gas inlet is located purify the body and be close to on the lateral wall that the power supply cutting ferrule connects, the adsorbent fill in the purification body, the heating rod is inserted and is established in the adsorbent, the heating rod is connected the power supply cutting ferrule connects, the overtemperature prote ware is established on the lateral wall of purification body.
5. The chromatograph gas purification system of claim 4, wherein: the default protection temperature set by the overtemperature protector is 120 ℃.
6. Chromatograph gas purification system according to claim 1 or 2, characterized in that: the adsorbent is a silica gel adsorbent and is used for absorbing moisture in gas.
7. Chromatograph gas purification system according to claim 1 or 2, characterized in that: the rear-stage purification tube is internally filled with an activated carbon molecular sieve, and the outlet of the rear-stage purification tube is provided with a pressure stabilizing valve which is used for adjusting output pressure.
8. Chromatograph gas purification system according to claim 1 or 2, characterized in that: the heating rod is a wing-shaped heating rod.
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| CN201921278133.XU CN210874737U (en) | 2019-08-07 | 2019-08-07 | Gaseous clean system of chromatograph |
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| CN201921278133.XU CN210874737U (en) | 2019-08-07 | 2019-08-07 | Gaseous clean system of chromatograph |
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| CN210874737U true CN210874737U (en) | 2020-06-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305136A (en) * | 2020-10-22 | 2021-02-02 | 云南电网有限责任公司电力科学研究院 | Combined carrier gas supply device of insulating oil chromatography online monitoring system |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305136A (en) * | 2020-10-22 | 2021-02-02 | 云南电网有限责任公司电力科学研究院 | Combined carrier gas supply device of insulating oil chromatography online monitoring system |
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