Sample waste gas recovery device

Abstract

The utility model discloses a sample waste gas recovery device which comprises a first pipeline and a second pipeline which are respectively connected into a nitrogen pipe network and a pressure combustible gas pipe network, the first pipeline and the second pipeline are converged and then are connected with a main pipeline, the main pipeline is connected with a vacuumizer, the vacuumizer is respectively connected with a third pipeline and a fourth pipeline, and the third pipeline and the fourth pipeline are communicated with the pipeline. The third pipeline is connected with a buffer tank, a first valve group and a gas bag, the fourth pipeline is connected with an emptying pipeline and a second valve group, and the fourth pipeline is connected with a gas recovery pipe network. And the safety is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of recovery devices, more specifically, a kind of sample waste gas recovery device belongs to petroleum chemical industry. BACKGROUND

[0002] In the field of petroleum chemical industry, there is a problem of sample waste gas disorderly discharge in large-scale experimental center and analysis center of refining. After using existing test and analysis gas sample, it is directly released into the atmosphere, which is harmful to the health of related personnel and not friendly to the environment. Therefore, it is a research trend to develop a recovery device that can recover low-pressure gas into a gas recovery pipe network after using test and analysis gas sample, reducing harm to the environment and related operators. SUMMARY

[0003] To solve the above technical problems, the utility model provides a sample waste gas recovery device with simple structure, high practicality, which can recover toxic and harmful waste gas used for analysis, no longer discharge into the atmosphere, and high safety.

[0004] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0005] The utility model relates to a kind of sample waste gas recovery device, including respectively connecting nitrogen pipe network, pressure combustible gas pipe network No. 1 pipeline, No. 2 pipeline, No. 1 pipeline, No. 2 pipeline is connected with main pipeline after convergence, main pipeline is connected with vacuum extractor, vacuum extractor is connected with No. 3 pipeline and No. 4 pipeline respectively, No. 3 pipeline is connected with buffer tank, No. 1 valve group, gas bag, No. 4 pipeline is connected with vent line and No. 2 valve group, No. 4 pipeline is connected with gas recovery pipe network.

[0006] Preferably, the main pipeline is connected with a pressure sensor and a first needle valve; the No. 1 pipeline and the No. 2 pipeline are respectively connected with a nitrogen valve and a first stop valve.

[0007] Preferably, the No. 1 valve group includes a second needle valve and a second stop valve arranged in sequence, the second stop valve is connected with the gas bag through an external pipeline, and an elastic water stop clamp is connected to the external pipeline.

[0008] Preferably, a vacuum gauge is connected to the No. 3 pipeline between the buffer tank and the second needle valve.

[0009] Preferably, the No. 2 valve group includes a fourth stop valve, a check valve and a third stop valve arranged in sequence.

[0010] Preferably, a fifth stop valve is connected to the vent line.

[0011] Preferably, a controller is further included, each valve is an electrically controlled valve and is in communication connection with the controller; the vacuum extractor, the pressure sensor and the vacuum gauge are in communication connection with the controller.

[0012] Beneficial effects: the sample waste gas recycling device can recycle used toxic and harmful waste gas, and does not discharge the air, which is friendly to the environment; the gas venting operation of the operator is replaced by the recycling operation, and the risk of harm to the body is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole structure schematic view of the utility model. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0015] As Figure 1 shown is a specific embodiment of a sample waste gas recycling device, the embodiment is a sample waste gas recycling device, which comprises a first pipeline and a second pipeline connected to a nitrogen gas pipe network and a pressure combustible gas pipe network respectively, a main pipeline connected after the first pipeline and the second pipeline are collected, a vacuum extractor 1 connected to the main pipeline, a third pipeline and a fourth pipeline connected to the vacuum extractor 1, a buffer tank 2, a first valve group and a gas bag 5 connected to the third pipeline, a venting pipeline 8 and a second valve group connected to the fourth pipeline, and the fourth pipeline connected to a gas recycling pipe network.

[0016] Technical principle / scheme: after the gas sample used for chemical analysis is used, the gas with lower pressure is recycled into the gas recycling pipe network, so as to reduce the harm to the environment and the related operators.

[0017] The pressure combustible gas is used, the pipeline system is vacuumized through the vacuum extractor (Venturi vacuum extractor), then the bagged or bottled waste gas sample to be recycled is connected with the recycling device, and the gas is recycled through the negative pressure generated in the recycling device. The power medium used is the gas beneficial to recycling, so that the combustible and toxic gas is recycled together with the waste gas, the disorderly discharge of the combustible and toxic gas is avoided, the environment is friendly, and the harm risk to the health of the operator is reduced.

[0018] The present application also describes the operation of the recycling device.

[0019] Initial state: open the fifth stop valve on the venting pipeline, and close all the other valves.

[0020] Device commissioning:

[0021] Check the device body flow correct, each component connection fastening, pressure gauge, vacuum gauge, buffer tank intact;

[0022] Close the No. 5 stop valve, open the root valve of the pressure gauge, No. 1 needle valve, No. 2 needle valve, No. 4 stop valve, open the nitrogen valve on the No. 1 pipeline connected with the nitrogen pipe network, charge the system to 0.5Mpa, and close the nitrogen valve.

[0023] Use soap water airtight device all connection points, if leakage is fastened.

[0024] Air tightness is completed, open No. 5 stop valve (local emptying valve) to unload the device pressure;

[0025] Replace the nitrogen pressure of the device for several times, take samples at the local emptying place for analysis, until the oxygen content is less than or equal to 0.5%;

[0026] Close all valves, device standby;

[0027] Operation procedure:

[0028] 1. Check that all valves of the device are in the closed state;

[0029] 2. Open No. 4 stop valve, No. 2 needle valve, and open pressure gauge cut-off valve;

[0030] 3. Open No. 1 stop valve, introduce fuel gas into the device, and keep the fuel gas pressure at 0.35-0.55Mpa.

[0031] 4. Open No. 4 stop valve, open No. 1 needle valve, after not less than 2 minutes, open vacuum gauge cut-off valve, and keep the vacuum degree stable.

[0032] 5. Connect the gas bag with the nozzle at No. 2 stop valve and fix it with pipe clamp, open No. 2 needle valve, then open the elastic stop valve, close No. 2 needle valve and No. 2 stop valve after the gas in the gas bag is completely recovered.

[0033] 6. Close all valves, device standby.

[0034] 7. Finished.

[0035] In a preferred embodiment, a pressure sensor (with root valve), No. 1 needle valve are connected on the main pipeline; nitrogen valve, No. 1 stop valve are connected on No. 1 pipeline and No. 2 pipeline respectively, the structure is simple and practical.

[0036] Preferably, the first valve group comprises a second needle valve 3 and a second stop valve 4 arranged in sequence, the second stop valve 4 is connected with the air bag 5 through an external pipeline, and an elastic water stop clamp is connected on the external pipeline, so that the structure is simple and the practicality is high.

[0037] Preferably, a vacuum gauge (with a valve) is connected on the third pipeline between the buffer tank 2 and the second needle valve 3, so that the structure is simple and the practicality is high.

[0038] Preferably, the second valve group comprises a fourth stop valve 6, a check valve 7 and a third stop valve arranged in sequence, so that the structure is simple and the practicality is high.

[0039] Preferably, a fifth stop valve is connected on the vent pipeline 8, so that the structure is simple and the practicality is high.

[0040] Preferably, the utility model further comprises a controller, each valve is an electric control valve and is in communication connection with the controller, the vacuum extractor 1, the pressure sensor and the vacuum gauge are in communication connection with the controller, so that remote control operation is facilitated.

[0041] Finally, it should be noted that the utility model is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or thought of by those skilled in the art from the disclosed content of the utility model should be considered as the protection scope of the utility model.

Claims

1. A sample exhaust gas recovery apparatus characterized by comprising: Including respectively access nitrogen pipe network, pressure combustible gas pipe network No. 1 pipeline, No. 2 pipeline, the No. 1 pipeline, No. 2 pipeline are connected with main pipeline after convergence, the main pipeline is connected with vacuum extractor (1), the vacuum extractor (1) is connected with No. 3 pipeline and No. 4 pipeline respectively, No. 3 pipeline is connected with buffer tank (2), No. 1 valve group, airbag (5), No. 4 pipeline is connected with vent line (8) and No. 2 valve group, No. 4 pipeline is connected with gas recovery pipe network.

2. A sample exhaust gas recovery device according to claim 1, characterized in that: The main pipeline is connected with pressure sensor, No. 1 needle valve;The No. 1 pipeline, No. 2 pipeline are connected with nitrogen valve, No. 1 stop valve respectively.

3. A sample exhaust gas recovery apparatus according to claim 1 or 2, characterized in that: The No. 1 valve group includes sequentially arranged No. 2 needle valve (3), No. 2 stop valve (4), the No. 2 stop valve (4) is connected with airbag (5) through external pipeline and the external pipeline is connected with elastic water stop clamp.

4. The sample exhaust gas recovery device of claim 1, wherein: The No. 3 pipeline between the buffer tank (2) and No. 2 needle valve (3) is connected with vacuum gauge.

5. A sample exhaust gas recovery apparatus according to claim 4, characterized by: The No. 2 valve group includes sequentially arranged No. 4 stop valve (6), check valve (7), No. 3 stop valve.

6. A sample exhaust gas recovery device according to claim 5, characterised in that: The vent line (8) is connected with No. 5 stop valve.

7. A sample exhaust gas recovery apparatus according to claim 4 or 5 or 6, characterised in that: It also includes a controller, each valve is electrically controlled valve and is connected with the controller;The vacuum extractor (1), pressure sensor, vacuum gauge are connected with the controller.

Images