Gas detection system capable of being widely applied to storage tank environment in sewage treatment industry

Abstract

The utility model discloses a gas detection system capable of being widely applied to the environment of a regulation and storage tank in the sewage treatment industry, which comprises an automatic / manual detection module which comprises a sampling valve, a blowback electromagnetic valve, a pressure sensor, a small pump, a water and dust remover, a calibration electromagnetic valve, a flow meter, an NGP gas detector and a flow sensor which are connected in sequence; the sampling valve and the large pump are connected in sequence; the automatic / manual reverse blowing module comprises a pressure regulating filter, a reverse blowing electromagnetic valve and a sampling valve which are connected in sequence; and the sensor calibration module comprises a calibration electromagnetic valve, a flow meter, an NGP gas detector and a flow sensor which are connected in sequence.

Description

Technical Field

[0001] The utility model relates to a gas detection system which can be widely used in the environment of storage tanks in sewage treatment industry. Background Art

[0002] The peak flow of sewage runoff is usually temporarily stored in the regulating reservoir of a traditional sewage treatment plant, and the sewage is slowly discharged from the regulating reservoir after the maximum flow drops. This can not only avoid sewage peaks and achieve sewage recycling, but also prevent the pollution of the receiving water body by initial sewage, and also play a positive role in drainage scheduling between drainage areas.

[0003] After sewage is stored in a confined space for a certain period of time, it is easy to produce toxic and harmful gases, mainly including hydrogen sulfide H2S, ammonia NH3, methane CH4, etc. produced by anaerobic reactions. Therefore, to ensure safety, designers should analyze the areas where toxic and harmful gases may be produced in the storage tank based on the water quality characteristics of the storage tank and the spatial design characteristics of the storage tank. In areas where toxic and harmful gases are likely to form and accumulate (such as indoor grille rooms, tanks, maintenance passages, etc.), the concentration of toxic and harmful gases should be tested to ensure the safety of personnel and property.

[0004] For the detection of toxic and harmful gases in regulating and storage tanks, most manufacturers only use a single instrument diffusion detection method. This method has a slow detection response, high uncertainty, and requires the deployment of multiple instruments at different locations, which makes subsequent maintenance inconvenient.

[0005] The customer urgently needs an online detection system that can gather the gas from various detection points into the system, and the system will automatically switch to detect. In order to ensure that the gas path is not blocked by dirt, it should also have a backflush function. In order to facilitate testing and deal with special situations, it should also have a manual detection / backflush function. In order to ensure the accuracy of the sensor, it should have a calibration function. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] The purpose of the utility model is to overcome the above-mentioned shortcomings and to provide a gas detection system that can be widely used in the environment of storage tanks in the sewage treatment industry.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the utility model discloses a gas detection system that can be widely used in the environment of regulating and storing tanks in the sewage treatment industry, including an automatic / manual detection module, which includes a sampling valve, a backflush solenoid valve, a pressure sensor, a small pump, a water removal and dust collector, a calibration solenoid valve, a flow meter, an NGP gas detector and a flow sensor connected in sequence; it also includes a sampling valve and a large pump connected in sequence; an automatic / manual backflush module, which includes a pressure regulating filter, a backflush solenoid valve and a sampling valve connected in sequence; a sensor calibration module, which includes a calibration solenoid valve, a flow meter, an NGP gas detector and a flow sensor connected in sequence.

[0010] Furthermore, a first gas path bus is provided between the back-blowing solenoid valve and the sampling valve; and a second gas path bus is provided between the sampling valve and the large pump.

[0011] Furthermore, one end of the water remover and dust collector is connected to a fine filter.

[0012] Furthermore, a manual three-way valve is provided between the small pump and the water remover and dust remover.

[0013] Furthermore, it also includes a first straight-through valve connected to the pressure regulating filter for draining water from the pressure regulating filter; and also includes a second straight-through valve connected to the water removal and dust removal device for draining water from the water removal and dust removal device.

[0014] Furthermore, it also includes a touch screen, an NGP control board and a relay control board. The NGP control board is used to collect data from the NGP gas detector, pressure sensor, flow sensor, temperature sensor, and control the relay control board; the relay control board is used to control the sampling valve, backblowing solenoid valve, and calibration solenoid valve; the touch screen has a UI interface, and the touch screen is connected to the NGP control board via a network cable for internal communication.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the technical solution of the utility model has the following advantages: the system can automatically detect and automatically backflush, which greatly reduces the workload of operation and maintenance personnel. The number of detection paths, types of detected gases, and automatic detection and backflush time of the system can be configured according to user needs. The system has a reserved sensor calibration function to ensure the detection accuracy of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a module diagram of a gas detection system of the utility model that can be widely used in a storage tank environment in the sewage treatment industry;

[0018] Figure 2 The utility model is a gas circuit diagram of an automatic / manual detection module of a gas detection system which can be widely used in a storage tank environment of a sewage treatment industry;

[0019] Figure 3 The utility model is a gas circuit diagram of an automatic / manual backflush module of a gas detection system which can be widely used in a storage tank environment of a sewage treatment industry;

[0020] Figure 4 The utility model is a gas circuit diagram of a sensor calibration module of a gas detection system which can be widely used in a storage tank environment in the sewage treatment industry.

[0021] In the figure: 1. Sampling valve; 2. Back-blowing solenoid valve; 3. Pressure sensor; 4. Small pump; 5. Water and dust remover; 6. Calibration solenoid valve; 7. Flow meter; 8. NGP gas detector; 9. Flow sensor; 10. Manual three-way valve; 11. Large pump; 12. Pressure regulating filter; 13. Second straight-through valve; 14. Fine filter; 15. First gas path bus; 16. Second gas path bus; 17. First straight-through valve. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] See also Figure 1-4. The utility model discloses a gas detection system that can be widely used in the environment of regulating and storing tanks in the sewage treatment industry, including an automatic / manual detection module, which includes a sampling valve 1, a backflush solenoid valve 2, a pressure sensor 3, a small pump 4, a water removal and dust removal device 5, a calibration solenoid valve 6, a flow meter 7, an NGP gas detector 8 and a flow sensor 9 connected in sequence; it also includes a sampling valve 1 and a large pump 11 connected in sequence; an automatic / manual backflush module, which includes a pressure regulating filter 12, a backflush solenoid valve 2 and a sampling valve 1 connected in sequence; a sensor calibration module, which includes a calibration solenoid valve 6, a flow meter 7, an NGP gas detector 8 and a flow sensor 9 connected in sequence. The sampling valve 1 is set accordingly according to the actual number of samples to be taken.

[0025] A first gas bus 15 is provided between the blowback solenoid valve 2 and the sampling valve 1, and a second gas bus 16 is provided between the sampling valve 1 and the large pump 11. The function of the bus is to collect the gases from multiple sampling valves 1 and then distribute them.

[0026] One end of the dewatering and dust removing device 5 is also connected to a fine filter 14 for further filtering.

[0027] A manual three-way valve 10 is also provided between the small pump 4 and the water remover and dust remover 5, which can be manually operated.

[0028] It also includes a first through valve 17 connected to the pressure regulating filter 12 for draining water from the pressure regulating filter 12 ; it also includes a second through valve 13 connected to the water remover and dust collector 5 for draining water from the water remover and dust collector 5 .

[0029] It also includes a touch screen, an NGP control board and a relay control board. The NGP control board is used to collect data from the NGP gas detector 8, the pressure sensor 3, the flow sensor 9, the temperature sensor (not a necessary feature of the system, so it is not shown) and control the relay control board; the relay control board is used to control the sampling valve 1, the backflush solenoid valve 2, and the calibration solenoid valve 6; the touch screen has a UI interface, and the touch screen is connected to the NGP control board via a network cable for internal communication. It should be noted that the touch screen, the NGP control board and the relay control board, the NGP control board are all control devices, but not necessary features of the execution level of the system, so they are not shown in the middle, and their specific control methods are not elaborated.

[0030] In addition, in order to ensure the normal operation of the system, the system is also equipped with indicator lights, buzzers, push button switches, terminal blocks, cabinet fans and stainless steel outdoor boxes. These devices are conventional settings and are basic measures to maintain the operation of the system.

[0031] Specific embodiment

[0032] 1) Automatic detection process:

[0033] like Figure 2 As shown, after the system is turned on, the NGP gas detector 8, touch screen, NGP control board, relay control board, pressure sensor 3, flow sensor 9, temperature sensor, large pump 11, small pump 4 and other electrical components start working, and the NGP control board controls the sampling 01 of the first sampling valve 1 to be powered on through the relay control board, and the backflush solenoid valve 2 and calibration solenoid valve 6 are powered off. The process is as follows: power on -> electrical components work -> sample gas -> air inlet -> sampling valve 1 -> first gas channel convergence row 15 -> backflush solenoid valve 2 -> pressure sensor 3 -> small pump 4 -> manual three-way valve 10 -> water and dust remover 5 -> fine filter 14 -> flow meter 7 -> air chamber -> flow sensor 9 -> emptying;

[0034] For other gases that are not currently detected, the process is as follows:

[0035] Sample gas -> air inlet -> sampling valve 1 -> second gas path convergence row 16 -> large pump 11 -> emptying;

[0036] The detection time of each sampling point is set by the user. When the sampling time is reached, the solenoid valve of this channel is powered off, and the next sampling valve 1 is powered on to realize the detection of the next sampling point. When all the detection points are detected once, the system enters the automatic backflush process.

[0037] 2) Automatic backflush process:

[0038] like Figure 3 As shown in the figure, after all sampling points have been automatically detected, the system enters the automatic backflush process. The specific process is as follows:

[0039] The large pump 11 and the small pump 4 are closed -> the back-blowing solenoid valve 2 is powered -> external compressed air -> pressure regulating filter 12 -> back-blowing solenoid valve 2 -> first gas path converging row 15 -> sampling valve 1 -> air inlet, and then the compressed air is blown into the on-site pipeline to blow out the dirt in the pipeline to ensure smooth gas path for the next test. The automatic back-blowing time is set by the user. When the back-blowing time is reached, the system enters the automatic detection process.

[0040] 3) Manual detection process:

[0041] The workflow of manual detection is consistent with that of automatic detection. The difference is that the opening and closing of the sampling valve 1 is controlled by the user on the touch screen rather than by the program. In the manual detection mode, the user can open any one or more sampling valves 1 to realize any one or more gas detection channels, and the detection time is also controlled by the user.

[0042] 4) Manual backflush process:

[0043] The workflow of manual backflush is consistent with that of automatic backflush. The difference is that the opening and closing of the sampling valve 1 is controlled by the user on the touch screen instead of program control. In the manual backflush mode, the user can open any one or more sampling valves 1 to realize any one or more gas backflush, and the backflush time is also controlled by the user.

[0044] 5) Sensor calibration process:

[0045] like Figure 4 As shown, in order to ensure the detection accuracy, the sensor needs to be calibrated regularly. The process is as follows:

[0046] Touch screen manually starts calibration -> Calibration solenoid valve 6 is powered on -> Large pump 11 and small pump 4 are powered off -> Standard gas is introduced -> Wait for data to stabilize -> User completes calibration on touch screen -> Calibration completed -> System enters automatic detection process.

[0047] The gas detection system of the present application can automatically detect and automatically backflush, which greatly reduces the workload of operation and maintenance personnel. The number of detection routes, detection gas types, and automatic detection and backflush time of the system can be configured according to user needs. The system has a reserved sensor calibration function to ensure the detection accuracy of the instrument.

[0048] In summary, the above-mentioned implementation modes are not limitative implementation modes of the present invention, and any modification or equivalent deformation made by technicians in this field on the basis of the essential content of the present invention is within the technical scope of the present invention.

Claims

1. A gas detection system that can be widely used in the environment of a storage tank in the sewage treatment industry, characterized by: include, An automatic / manual detection module comprises a sampling valve (1), a backflush solenoid valve (2), a pressure sensor (3), a small pump (4), a water and dust remover (5), a calibration solenoid valve (6), a flow meter (7), an NGP gas detector (8) and a flow sensor (9) which are connected in sequence; and also comprises a sampling valve (1) and a large pump (11) which are connected in sequence; An automatic / manual backflush module, comprising a pressure regulating filter (12), a backflush solenoid valve (2) and a sampling valve (1) connected in sequence; A sensor calibration module comprises a calibration solenoid valve (6), a flow meter (7), an NGP gas detector (8) and a flow sensor (9) which are connected in sequence.

2. According to claim 1, a gas detection system that can be widely used in the environment of a storage tank in the sewage treatment industry is characterized in that: A first gas path busbar (15) is provided between the backflush solenoid valve (2) and the sampling valve (1); and a second gas path busbar (16) is provided between the sampling valve (1) and the large pump (11).

3. A gas detection system according to claim 2 that can be widely used in the environment of a storage tank in the sewage treatment industry, characterized in that: One end of the dewatering and dust removing device (5) is also connected to a fine filter (14).

4. A gas detection system according to claim 3 that can be widely used in the environment of a storage tank in the sewage treatment industry, characterized in that: A manual three-way valve (10) is also provided between the small pump (4) and the water and dust remover (5).

5. A gas detection system according to claim 4 that can be widely used in the environment of a storage tank in the sewage treatment industry, characterized in that: It also includes a first through valve (17) in communication with the pressure regulating filter (12) for draining water from the pressure regulating filter (12); and a second through valve (13) in communication with the water removing and dust removing device (5) for draining water from the water removing and dust removing device (5).

6. A gas detection system according to any one of claims 1 to 5 that can be widely used in a storage tank environment in a sewage treatment industry, characterized in that: It also includes a touch screen, an NGP control board and a relay control board. The NGP control board is used to collect data from an NGP gas detector (8), a pressure sensor (3), a flow sensor (9), and a temperature sensor, and to control the relay control board; the relay control board is used to control a sampling valve (1), a backflush solenoid valve (2), and a calibration solenoid valve (6); the touch screen has a UI interface, and the touch screen is connected to the NGP control board via a network cable for internal communication.

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