Extraction type online monitoring system for various combustible toxic and harmful gases in limited space

Abstract

The utility model provides an extraction type on-line monitoring system for various combustible, poisonous and harmful gases in a limited space, relates to the technical field of harmful gas detection, and solves the problems that the existing gas detection is time-consuming and labor-consuming, detection equipment is manually carried, the concentration of various poisonous and harmful combustible gases in the limited space cannot be obtained, and certain potential safety hazards exist. The device comprises a gas-water separator, a vacuum pump, a dust filter, a flow meter and a gas detector, the sampling point, the gas-water separator, the dust filter, the flow meter, the gas detector and the vacuum pump are sequentially connected through a pipeline, and a water sensor is further arranged on the gas-water separator. The sampling box further comprises a control module used for receiving detection signals and controlling the vacuum pump. The beneficial effects of the utility model are that the device can accurately reflect the numerical value of the combustible and poisonous gas, accurately master the concentration of the combustible and poisonous gas on site, and effectively eliminate the potential safety hazard; and gas management and corresponding equipment are better protected, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of harmful gas detection, in particular to an extraction type online monitoring system for multiple flammable, toxic and harmful gases in a limited space. Background Art

[0002] Domestic waste incineration power generation technology uses the heat energy generated by waste incineration to generate electricity, which can achieve harmlessness, reduction and resource utilization of domestic waste. It is the mainstream technology for harmless disposal of domestic waste. Before entering the furnace for incineration, the garbage needs to be piled up and fermented in the garbage pool for 5-7 days. Since the garbage pool of the waste incineration power plant is a restricted working space and the environment is harsh, how to ensure the personal and property safety of workers entering the garbage pool has become a very critical issue.

[0003] The method currently used by waste incineration plants is to ventilate the confined space before entering the confined space and use a portable gas detector to measure the concentration of toxic and harmful combustible gases. This method requires manual carrying of the gas detector to the periphery of the confined space and then using tools such as ropes to manually lower the gas detector into the confined space to measure the concentration of toxic and harmful combustible gases. This measurement method is time-consuming and labor-intensive. In addition, the portable detector cannot simultaneously and in real time obtain the concentrations of multiple toxic and harmful combustible gases in the confined space, which poses certain safety risks. Utility Model Content

[0004] The utility model aims to solve the problem that the existing gas detection is time-consuming and labor-intensive, uses manually carried detection equipment, cannot obtain the concentration of various toxic, harmful and combustible gases in a limited space, and has certain safety hazards.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An extractive online monitoring system for multiple flammable, toxic and harmful gases in a confined space comprises a sampling box and a plurality of sampling points arranged in the sampling space, and is characterized in that: the sampling box comprises an air-water separator, a vacuum pump, a dust filter, a flow meter and a gas detector; the sampling points, the air-water separator, the dust filter, the flow meter, the gas detector and the vacuum pump are connected in sequence through pipelines; a water immersion sensor is also arranged on the air-water separator; and the sampling box also comprises a control module for receiving detection signals and controlling the vacuum pump.

[0007] Further improvement is: the control module includes a controller, a display screen, a relay, and a reminder module, the gas detector and the water immersion sensor are electrically connected to the controller, the controller is electrically connected to the display screen and the relay, and the relay is electrically connected to the reminder module and the vacuum pump.

[0008] Further improvements are: the controller is a PLC controller, the display screen is a touch screen, and the gas detector is a four-in-one combustible and toxic gas detector.

[0009] A further improvement is that the reminder module includes an LED flashing light and a buzzer.

[0010] A further improvement is that the buzzer and the LED flashing light are electrically connected to the relay.

[0011] A further improvement is that a bypass valve is also provided in the sampling box, one end of the gas-water separator is connected to the sampling point through a sampling air inlet pipe, the other end of the gas-water separator is connected to one end of the dust filter through a pipeline via a bypass valve, the other end of the dust filter is connected to one end of a flow meter through a pipeline, the other end of the flow meter is connected to one end of a gas detector through an air supply pipe, and the other end of the gas detector is connected to a vacuum pump through a return air pipe via a bypass valve.

[0012] A further improvement is that the vacuum pump comprises an instrument air duct and an exhaust pipe, and the instrument air duct is connected to a pressure regulating valve, wherein the pressure regulating valve is used to regulate the pressure of the vacuum pump.

[0013] A further improvement is that: five sampling points are provided.

[0014] Compared with the existing technology, the above technical solution has the following beneficial effects:

[0015] The four-in-one gas sensor and multiple sampling points can accurately reflect the combustible and toxic gas values, accurately grasp the on-site combustible, toxic and harmful gas concentrations in garbage pools and leachate pools, and the reminder module will have sound and light alarm outputs when the concentration exceeds the standard, effectively eliminating safety hazards;

[0016] A water immersion sensor is added to automatically stop pumping when liquid is pumped out, better protect gas management and corresponding equipment, and extend service life;

[0017] The gas-water separator and dust filter can separate the gas and water and filter the dust in the extracted sample gas, avoiding the influence of water vapor and dust on subsequent gas pipelines and equipment, and further extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the system structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the sampling box 1 in the utility model;

[0021] Figure 3 It is a schematic diagram of the internal structure of the sampling box 1 in the utility model;

[0022] Figure 4 It is a schematic diagram and block diagram of the system circuit structure of the utility model.

[0023] Explanation of the reference numerals: sampling box 1, sampling air inlet pipe 2, gas-water separator 3, vacuum pump 4, instrument air duct 41, exhaust pipe 42, pressure regulating valve 5, bypass valve 6, dust filter 7, flow meter 8, gas detector 9, sampling point 10, controller 11, display screen 12, relay 13, reminder module 14, air supply pipe 91, air return pipe 92. DETAILED DESCRIPTION

[0024] See also Figure 1-Figure 4 As shown, the technical solution adopted in this specific embodiment is: an extraction-type online monitoring system for multiple flammable, toxic and harmful gases in a limited space, which includes a sampling box 1 and a plurality of sampling points 10 arranged in the sampling space, characterized in that: the sampling box 1 includes an air-water separator 3, a vacuum pump 4, a dust filter 7, a flow meter 8, and a gas detector 9, the sampling points 10, the air-water separator 3, the dust filter 7, the flow meter 8, the gas detector 9, and the vacuum pump 4 are connected in sequence through pipelines, the air-water separator 3 is also provided with a water immersion sensor, and the sampling box 1 also includes a control module for receiving detection signals and controlling the vacuum pump 4.

[0025] Among them, the control module includes a controller 11, a display screen 12, a relay 13, and a reminder module 14. The gas detector 9 and the water immersion sensor are electrically connected to the controller 11. The controller 11 is electrically connected to the display screen 12 and the relay 13. The relay 13 is electrically connected to the reminder module 14 and the vacuum pump 4.

[0026] Wherein, the controller 11 is a PLC controller, the display screen 12 is a touch screen, and the gas detector 9 is a four-in-one combustible and toxic gas detector.

[0027] Among them, the water immersion sensor is commonly used in real life, such as the water immersion sensor of model JRWINBLiP, and its corresponding circuit is provided by the manufacturer; the gas detector 9 is a four-in-one gas detector of model YL-2208122, and its corresponding circuit is provided by the manufacturer; the touch screen is a color touch screen of BOE, and its corresponding circuit is provided by the manufacturer; the PLC controller is a programmable controller of Mitsubishi FX3U-128MT / ES-A, and its corresponding circuit is provided by the manufacturer.

[0028] Wherein, the reminder module 64 includes an LED flashing light and a buzzer.

[0029] The buzzer and the LED flashing light are electrically connected to the relay 63 .

[0030] Among them, the buzzer is a buzzer commonly used in real life, such as the buzzer with model HJ-FMQ, and its corresponding circuit is provided by the manufacturer; the LED flashing light is a flashing light strip commonly used in real life, such as the model BR-10349, and its corresponding circuit is provided by the manufacturer.

[0031] Among them, a bypass valve 6 is also provided in the sampling box 1, one end of the gas-water separator 3 is connected to the sampling point 10 through the sampling air inlet pipe 2, the other end of the gas-water separator 3 is connected to one end of the dust filter 7 through a pipeline through the bypass valve 6, the other end of the dust filter 7 is connected to one end of the flow meter 8 through a pipeline, the other end of the flow meter 8 is connected to one end of the gas detector 9 through the air supply pipe 91, and the other end of the gas detector 9 is connected to the vacuum pump 4 through the return air pipe 92 through the bypass valve 6.

[0032] The vacuum pump 4 includes an instrument air duct 41 and an exhaust pipe 42 , and a pressure regulating valve 5 is connected to the instrument air duct 41 . The pressure regulating valve 5 is used to regulate the pressure of the vacuum pump 4 .

[0033] There are five sampling points 10.

[0034] The working principle of the utility model is as follows: when in use, the sample gas from different areas of the target site is passed through the sampling air inlet pipe, filtered by the gas-water separator and the dust filter, and then reaches a combustible and toxic gas detector for concentration detection. The concentration of the relevant gas after detection is displayed on the color touch screen through the controller; there is a water immersion sensor on the sampling box. The liquid monitoring function can be realized. If leachate or other liquid is drawn, a signal will be sent to the controller, and the controller will stop the operation of the vacuum pump and stop pumping to protect the internal gas pipeline and the corresponding equipment from damage. After the sample gas is sampled and tested, the waste gas is discharged back into the leachate pool.

[0035] The equipment uses high-precision gas sensors. The PLC control system will cyclically detect the combustible and toxic gas values ​​at each sampling point in turn, and feed back to the controller to accurately grasp the on-site combustible, toxic and harmful gas concentrations in the garbage pool and leachate pool. If the concentration exceeds the standard, an audible and visual alarm will be output to effectively eliminate safety hazards.

[0036] The above shows and describes the basic principle and main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents. Anything not described in detail in the utility model is a well-known technology of those skilled in the art.

Claims

1. An extractive online monitoring system for multiple flammable, toxic and harmful gases in a limited space, comprising a sampling box and a number of sampling points arranged in the sampling space, characterized in that: The sampling box includes an air-water separator, a vacuum pump, a dust filter, a flow meter, and a gas detector. The sampling point, air-water separator, dust filter, flow meter, gas detector, and vacuum pump are connected in sequence through pipelines. A water immersion sensor is also provided on the air-water separator. The sampling box also includes a control module for receiving detection signals and controlling the vacuum pump.

2. The extractable online monitoring system for multiple flammable, toxic and harmful gases in a limited space according to claim 1 is characterized by: The control module includes a controller, a display screen, a relay, and a reminder module. The gas detector and the water immersion sensor are electrically connected to the controller. The controller is electrically connected to the display screen and the relay. The relay is electrically connected to the reminder module and the vacuum pump.

3. The extractable online monitoring system for multiple flammable, toxic and harmful gases in a limited space according to claim 2 is characterized by: The controller is a PLC controller, the display screen is a touch screen, and the gas detector is a four-in-one combustible and toxic gas detector.

4. The extractable online monitoring system for multiple flammable, toxic and harmful gases in a limited space according to claim 2 is characterized by: The reminder module includes an LED flashing light and a buzzer.

5. The extractable online monitoring system for multiple flammable, toxic and harmful gases in a limited space according to claim 4 is characterized by: The buzzer and the LED flashing light are electrically connected to the relay.

6. The extractable online monitoring system for multiple flammable, toxic and harmful gases in a limited space according to claim 1 is characterized by: A bypass valve is also provided in the sampling box. One end of the gas-water separator is connected to the sampling point through a sampling air inlet pipe, and the other end of the gas-water separator is connected to one end of the dust filter through a pipeline via a bypass valve. The other end of the dust filter is connected to one end of a flow meter through a pipeline, and the other end of the flow meter is connected to one end of a gas detector through an air supply pipe. The other end of the gas detector is connected to a vacuum pump through a return air pipe via a bypass valve.

7. The extractable online monitoring system for multiple flammable, toxic and harmful gases in a limited space according to claim 6 is characterized by: The vacuum pump comprises an instrument air duct and an exhaust pipe, and the instrument air duct is connected with a pressure regulating valve.

8. The extractable online monitoring system for multiple flammable, toxic and harmful gases in a limited space according to claim 1 is characterized by: There are five sampling points.

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