Cleaning device for VOC sampling bag

Abstract

The utility model discloses a cleaning device for a VOC (volatile organic compound) sampling bag, which comprises a temperature box, a cleaning device and a control device. One end of the gas inlet pipeline is connected with the sampling bag, and the other end of the gas inlet pipeline is connected with a nitrogen generation device; one end of the recovery pipeline is connected with the sampling bag, the other end of the recovery pipeline is communicated with the gas inlet pipeline, and an adsorption purifier is arranged on the recovery pipeline. According to the utility model, the recovery pipeline is additionally arranged, after a single cycle is completed, gas in the collection bag can be discharged from the recovery pipeline, and after being adsorbed and purified by the adsorption purifier, the gas flows into the gas inlet pipeline again and is filled into the collection bag for the next cycle. Therefore, only the nitrogen generation device needs to generate nitrogen in the first cycle, and new nitrogen does not need to be filled in each subsequent cycle, so that the usage amount of the nitrogen is greatly reduced, and the cleaning cost of the collection bag is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas sampling analysis technical field especially, it relates to a kind of cleaning device of VOC sampling bag. BACKGROUND

[0002] VOC sampling bag is mainly used to collect and temporarily store volatile organic compounds (VOCs) in air, so as to be accurately analyzed in laboratory subsequently. When collecting different gas samples, the sampling bag needs to be cleaned to avoid the pollution of newly collected gas by the residual gas of last collection.

[0003] The existing collection bag cleaning scheme first needs to introduce clean gas such as nitrogen into the collection bag, and then put it into a temperature box to stay in a high-temperature environment for a period of time, and then the gas in the collection bag is discharged to complete a single cycle. Repeat multiple cycles until the collection bag is completely cleaned.

[0004] However, after each cycle of the above-mentioned collection bag, the gas discharged from the collection bag is wasted, and new nitrogen needs to be recharged, which leads to a large amount of nitrogen usage and high cleaning cost. SUMMARY

[0005] In view of the above shortcomings of the prior art, the technical problem to be solved by the utility model is to provide a cleaning device for VOC sampling bag to solve the problem of high cleaning cost of cleaning collection bag caused by the inability of nitrogen to be recycled in the prior art.

[0006] The technical solution adopted by the utility model to solve its technical problem is a cleaning device for VOC sampling bag, comprising:

[0007] A temperature box has a chamber in which the sampling bag can be accommodated;

[0008] A gas inlet pipeline is connected to one end of the sampling bag, and the other end is connected to a nitrogen generating device;

[0009] A recovery pipeline is connected to one end of the sampling bag, and the other end is communicated with the gas inlet pipeline, and an adsorption purifier is arranged on the recovery pipeline.

[0010] Further, a pressure sensor is arranged on the gas inlet pipeline.

[0011] Further, a flow controller is arranged on the gas inlet pipeline.

[0012] Further, an air suction pump is arranged on the recovery pipeline, and the air suction pump is between the adsorption purifier and the gas inlet pipeline.

[0013] Further, a control panel is arranged on the shell of the temperature box, and the control panel can control the start and stop of the nitrogen generating device, the start of the adsorption purifier and the temperature in the chamber.

[0014] Further, the sampling bag has an air inlet and an air outlet, the air inlet is communicated with one end of the air inlet pipeline, and the air outlet is communicated with one end of the recovery pipeline.

[0015] Further, the air inlet and the air outlet are respectively arranged at opposite ends of the sampling bag.

[0016] Compared with the prior art, the cleaning device has at least the following beneficial effects:

[0017] (1) The recovery pipeline is arranged, after a single cycle is completed, the gas in the sampling bag can be discharged from the recovery pipeline, purified by the adsorption purifier, then flow into the air inlet pipeline and fill into the sampling bag again, and the next cycle is performed. Therefore, only the nitrogen generating device generates nitrogen in the first cycle, and new nitrogen is not needed to be filled in each subsequent cycle, so that the use amount of nitrogen is greatly reduced, and the cleaning cost of the sampling bag is reduced.

[0018] (2) The pressure sensor is arranged on the air inlet pipeline, the air pressure in the air inlet pipeline is collected through the pressure sensor, and whether the sampling bag leaks is determined through the collected air pressure, so that the leak detection function is realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the cleaning device in the embodiment;

[0020] In the drawings:

[0021] 100, temperature box;

[0022] 200, sampling bag;

[0023] 300, air inlet pipeline; 310, pressure sensor; 320, flow controller; 330, nitrogen generating device;

[0024] 400, recovery pipeline; 410, adsorption purifier; 420, air pump. DETAILED DESCRIPTION

[0025] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0026] Please refer to Figure 1 The utility model discloses a cleaning device of VOC sampling bag, which comprises:

[0027] A temperature box 100, which has a chamber capable of containing the sampling bag inside;

[0028] An air inlet pipe 300, one end of which is connected with the sampling bag, and the other end of which is connected with a nitrogen generating device 330;

[0029] A recovery pipe 400, one end of which is connected with the sampling bag, and the other end of which is communicated with the air inlet pipe 300, and an adsorption purifier 410 is arranged on the recovery pipe 400.

[0030] Specifically, first, the sampling bag 200 is placed in the chamber in the temperature box 100, then nitrogen is generated by the nitrogen generating device 330, and the nitrogen is filled into the sampling bag 200 through the air inlet pipe 300, and finally the temperature in the chamber in the temperature box 100 is adjusted to a predetermined temperature (for example, 65℃) and maintained for a predetermined time (for example, three hours), to complete a single cycle. After multiple cycles, the cleaning of the sampling bag 200 is completed.

[0031] Importantly, the present application adds the recovery pipe 400, after the completion of a single cycle, the gas in the sampling bag 200 can be discharged from the recovery pipe 400, purified by the adsorption purifier 410, and then flow into the air inlet pipe 300 and fill into the sampling bag 200 again for the next cycle. In this way, only nitrogen is generated by the nitrogen generating device 330 in the first cycle, and no new nitrogen needs to be filled in each subsequent cycle, greatly reducing the amount of nitrogen used and the cost of cleaning the sampling bag 200.

[0032] Further, during the entire cleaning process of the sampling bag 200, multiple cleaning cycles are not required. Specifically, during the entire cleaning period, the gas in the sampling bag 200 is continuously discharged, cleaned continuously by the adsorption purifier on the recovery pipe 400, and the cleaned nitrogen continues to be filled into the sampling bag 200 through the air inlet pipe 300 until the cleaning of the sampling bag 200 is completed. In this way, the time and cost of multiple cycles are saved, the cleaning efficiency is improved, energy consumption is reduced, and the effect of energy saving and carbon reduction is achieved.

[0033] Further, a pressure sensor 310 is arranged on the air inlet pipe 300.

[0034] The pressure sensor 310 is arranged on the air inlet pipe 300, the air pressure in the air inlet pipe 300 is collected by the pressure sensor 310, and whether the sampling bag 200 leaks is determined by the collected air pressure. It can be seen that the sampling bag 200 cleaning device of the present application not only has a cleaning function, but also has a leak detection function.

[0035] Specifically, a certain amount of nitrogen gas is introduced into the collection bag 200, and the pressure sensor 310 is observed for a certain period of time. If the change in the value of the pressure sensor 310 is within the allowable range, it indicates that the collection bag 200 is sealed well and does not leak. If the change in the value of the pressure sensor 310 is beyond the allowable range, it indicates that the collection bag 200 leaks, and the cleaning process can be terminated, and the next collection bag 200 to be cleaned can be replaced. In this way, the cleaning of the collection bag 200 that leaks can be avoided, and unnecessary work can be prevented.

[0036] Further, the flow controller 320 is arranged on the gas inlet pipeline 300.

[0037] Specifically, the flow controller 320 is arranged to control the amount of nitrogen gas introduced, so as to avoid waste.

[0038] Further, the gas suction pump 420 is arranged on the gas recovery pipeline 400, and the gas suction pump 420 is arranged between the adsorption purifier 410 and the gas inlet pipeline 300.

[0039] Specifically, the gas suction pump 420 provides the power for the flow of gas, including the power for discharging gas from the collection bag 200 and the power for introducing gas into the collection bag 200.

[0040] Further, the control panel is arranged on the outer shell of the temperature box 100, and the control panel can control the start and stop of the nitrogen gas generator 330, the start of the adsorption purifier 410, and the temperature in the chamber.

[0041] Specifically, the control panel controls the start and stop of the nitrogen gas generator 330, the start of the adsorption purifier 410, and the temperature in the chamber, and the control of multiple devices is integrated in one place, which is convenient for operation. Of course, the control of various devices can also be controlled by the program of the circuit board to realize automatic cleaning.

[0042] Further, the sampling bag has a gas inlet and a gas outlet, the gas inlet can be in communication with one end of the gas inlet pipeline 300, and the gas outlet can be in communication with one end of the gas recovery pipeline 400.

[0043] Further, the gas inlet and the gas outlet are respectively arranged at opposite ends of the sampling bag.

[0044] Specifically, the gas inlet and the gas outlet are respectively arranged at opposite ends of the collection bag 200. When the gas forms a loop and continuously flows, the gas can flow from one end to the other end in the collection bag 200, and the flow path of the gas in the collection bag 200 can cover a larger range, thereby improving the cleaning effect and avoiding residues.

[0045] It should be noted that all directional indications (such as upper, lower, left, right, front, rear, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0046] In addition, the descriptions such as "first", "second", "one" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0047] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

Claims

1. A cleaning device for VOC sampling bags, characterized in that, The application relates to a sampling device for sampling the air in a sealed environment, comprising: a temperature box with a cavity for accommodating the sampling bag; an air inlet pipeline connected with one end of the sampling bag and provided with a nitrogen generating device at the other end; a recovery pipeline connected with the other end of the sampling bag and communicated with the air inlet pipeline, and provided with an adsorption purifier on the pipeline.

2. The cleaning device for VOC sampling bags according to claim 1, wherein, A pressure sensor is arranged on the air inlet pipeline.

3. The cleaning device for VOC sampling bags of claim 1, wherein, A flow controller is arranged on the air inlet pipeline.

4. The cleaning device for VOC sampling bags of claim 1, wherein, An air suction pump is arranged on the recovery pipeline and located between the adsorption purifier and the air inlet pipeline.

5. The cleaning device for VOC sampling bags of claim 1, wherein, A control panel is arranged on the outer shell of the temperature box, which can control the start and stop of the nitrogen generating device, the start of the adsorption purifier and the temperature in the cavity.

6. The cleaning device for VOC sampling bags of claim 1, wherein, The sampling bag is provided with an air inlet and an air outlet, the air inlet can be communicated with one end of the air inlet pipeline, and the air outlet can be communicated with one end of the recovery pipeline.

7. The cleaning device for VOC sampling bags of claim 6, wherein, The air inlet and the air outlet are respectively located at opposite ends of the sampling bag.

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