CN211664930U - Methane explosion-proof device of solar forced ventilation septic tank - Google Patents

Abstract

The utility model belongs to at the explosion-proof field of airtight space environment online fixed point pollution source methane measurement, concretely relates to solar energy forced draft septic tank methane explosion-proof equipment. A methane explosion-proof device of a solar forced ventilation septic tank is characterized by comprising a septic tank, an exhaust pipeline, a ventilation fan, a ventilation hole, a solar cell panel, a storage battery, a voltage stabilizing module, an MCU minimum system, a methane sensor, an MOS (metal oxide semiconductor) tube and a red/green LED (light-emitting diode) lamp; the utility model discloses an useful part is, this methane early warning explosion-proof equipment utilizes the solar energy power supply, natural draft at ordinary times, and methane sensor on-line measurement septic tank inside methane concentration, if concentration is greater than the explosion threshold value, MCU minimum system control ventilation electric fan forced draft can in time discharge methane gas, can effectively prevent the septic tank enclosure space's explosion accident from producing. The device also has the advantages of explosion prevention, reliability, low price, convenient installation and long-term durability.

Description

Methane explosion-proof device of solar forced ventilation septic tank

Technical Field

The utility model belongs to at airtight space environment online fixed point pollution source methane measurement field, concretely relates to solar energy forced draft septic tank methane explosion-proof equipment.

Background

Newspapers and televisions are frequently showing news such as 'septic tank explosion'. The septic tank is a closed tunnel, namely a closed space, below a building, and is a primary treatment facility for removing suspended organic matters in domestic sewage by using the principles of precipitation and anaerobic fermentation. A septic tank, which belongs to a domestic sewage treatment facility of an underground structure. No matter in urban residential buildings or office buildings, a septic tank below the building is indispensable. In order to prevent air pollution around the septic tank, the septic tank is set into an underground closed space, and domestic sewage is precipitated and anaerobically fermented in the septic tank. The explosion reason is that methane, hydrogen sulfide and other gases are generated in the fermentation and degradation of sludge deposited in the closed space of the septic tank. Methane, hydrogen sulfide and other gases, belonging to combustible explosive gases. If the gas is excessively gathered in the septic tank, the concentration reaches above 40000PPM, and once sparks appear, explosion is generated. The quantity or the concentration of combustible explosive gas in the septic tank is controlled, so that explosion accidents can be prevented. Aiming at the explosion accident of the septic tank, an exhaust pipeline is arranged at the upper part of the septic tank, a forced ventilation device is arranged in the exhaust pipeline, a solar power supply is adopted for driving, an MCU minimum system, a methane sensor and a ventilation system form an online measurement control system, and the forced ventilation can effectively prevent the explosion accident of the septic tank.

SUMMERY OF THE UTILITY MODEL

The technical scheme of the utility model: a methane explosion-proof device of a solar forced ventilation septic tank is characterized by comprising a septic tank, an exhaust pipeline, a ventilation pipeline, an axial flow type ventilation fan, a ventilation hole, a solar cell panel, a storage battery, a voltage stabilizing module, an MCU minimum system, a methane sensor, an MOS (metal oxide semiconductor) tube and a red/green LED (light emitting diode) lamp; the exhaust pipeline is erected on the septic tank, the lower part of the exhaust pipeline is communicated with a gas layer in the septic tank, and the upper part of the exhaust pipeline is connected with the ventilation pipeline; installing an axial-flow type ventilation fan in the ventilation pipeline, installing a methane sensor above the axial-flow type ventilation fan, and arranging 8 ventilation holes at intervals of 45 degrees on the wall of the ventilation pipeline at the upper part of the methane sensor; the ventilation pipeline at the upper part of the ventilation hole is arranged into a sealing surface with an elevation angle of 30 degrees, the sealing surface with the elevation angle of 30 degrees faces south, and the included angle between the normal line of the sealing surface and the downward vertical direction is 30 degrees; a solar cell panel with an elevation angle of 30 degrees towards the south is arranged on the sealing surface with the elevation angle of 30 degrees; the solar cell panel is electrically connected with a storage battery, the positive electrode of the storage battery is electrically connected with the D pole of the MOS tube, the S pole of the MOS tube is electrically connected with one end of the axial-flow type ventilation fan motor, and the other end of the axial-flow type ventilation fan motor is electrically connected with the negative electrode of the storage battery; the storage battery is electrically connected with the voltage stabilizing module, and the voltage stabilizing module is electrically connected with the MCU minimum system; the MCU minimum system is electrically connected with the red/green lamp, the grid electrode of the MOS tube and the methane sensor.

The utility model relates to a solar energy forced draft septic tank methane explosion-proof equipment's theory of operation brief states: the measurement process comprises the following steps: methane (CH4) gas generated by fermentation in the septic tank is lighter than air and can float away through gaps among blades of the axial-flow type ventilation fan along with the ventilation pipeline; and a methane sensor in the ventilation pipeline measures the methane gas concentration and transmits the methane gas concentration to the MCU minimum system. The energy source of the methane early warning explosion-proof device is a solar cell panel. In the daytime, the solar cell panel charges the storage battery, and the storage battery stores electric energy; the storage battery supplies power to the MCU minimum system through the voltage stabilizing module, and the MCU minimum system measures the methane gas concentration in the ventilation pipeline through the methane sensor; in general, the concentration of methane gas is lower than an explosion threshold value, a MCU minimum system controls a green LED lamp to be lightened without early warning, and an axial flow type ventilation fan is not moved and belongs to a natural air exhaust state; when methane gas concentration is close to an explosion threshold value, a red LED lamp of the MCU minimum system is turned on, red early warning of the MCU minimum system is realized, a drive MOS (metal oxide semiconductor) tube of the MCU minimum system is conducted, the axial flow type ventilation fan rotates, air is forcibly pumped and ventilated, methane is discharged, and accidents are prevented.

The utility model discloses an useful part is, this methane early warning explosion-proof equipment utilizes the solar energy power supply, natural draft at ordinary times, and methane sensor on-line measurement septic tank inside methane concentration, like concentration proximity explosion threshold value, MCU minimum system control axial-flow ventilation fan forced draft can in time discharge methane gas, can effectively prevent the septic tank enclosure space's explosion accident from producing.

Drawings

Fig. 1 is a schematic structural diagram of a methane explosion-proof device of a solar forced ventilation septic tank.

In the figure: 1. septic tank, 1.1, septic tank inlet port, 2, exhaust duct, 3, air pipe, 4, axial-flow type ventilation fan, 5, ventilation hole, 6, solar cell panel.

Detailed Description

An XHX-JW-FB solar forced ventilation enclosed space methane explosion-proof device is taken as an embodiment and explained as follows: an XHX-JW-FB enclosed space methane explosion-proof device is characterized in that a solar cell panel is a new single crystal polycrystalline solar cell panel 50W watt photovoltaic power generation system charged with 12V storage battery household 50W single crystal 67W 54W 3CM, a storage battery adopts a 12V11AS storage battery, an MCU minimum system adopts an 8-pin PIC single chip microcomputer (PIC-10) with ultralow power consumption and ultralow cost, an MOS (oxygen-nitrogen) tube adopts AO3421, an axial flow ventilation fan adopts a 12V axial flow fan, and a methane sensor adopts a KG900 9001C high-concentration methane sensor with long service life. Selecting the diameter of an exhaust pipeline according to the volume of the septic tank, and selecting PVC plastic pipes with the diameter of about phi 120 mm for the exhaust pipeline and the ventilation pipeline; the pipe diameter of the ventilation pipeline is larger than that of the exhaust pipeline, so that the pipeline connection is facilitated. Installing an axial-flow type ventilation fan in the ventilation pipeline, installing a methane sensor behind the axial-flow type ventilation fan, and arranging 8 ventilation holes at intervals of 45 degrees on the wall of the ventilation pipeline at the upper part of the methane sensor; the ventilation pipeline at the upper part of the ventilation hole is arranged into a sealing surface with an elevation angle of 30 degrees, the sealing surface with the elevation angle of 30 degrees faces south, and the included angle between the sealing surface and the downward vertical direction is 30 degrees; a solar cell panel having an inclination angle of 30 degrees in the south direction is mounted on a sealing surface having an elevation angle of 30 degrees. The storage battery, the voltage stabilizing module, the MCU minimum system, the MOS tube and the red/green LED lamp are all sealed in a plastic box, and the plastic box is fixed below the solar cell panel. The measurement process comprises the following steps: methane (CH4) gas generated by fermentation in the septic tank is lighter than air and flows away through gaps among the blades of the axial-flow type ventilation fan along with the ventilation pipeline; and a methane sensor in the ventilation pipeline measures the methane gas concentration and transmits the methane gas concentration to the MCU minimum system. The energy source of the methane early warning explosion-proof device is a solar cell panel. In the daytime, the solar cell panel charges the storage battery, and the storage battery stores electric energy; the storage battery supplies power to the MCU minimum system through the voltage stabilizing module, and the MCU minimum system measures the methane gas concentration in the ventilation pipeline through the methane sensor; in general, the concentration of methane gas is lower than an explosion threshold value, a green LED lamp of a MCU minimum system is lightened without early warning, and an axial flow type ventilation fan is not moved and belongs to a natural air exhaust state; when the methane gas concentration is higher than the explosion threshold value, the red LED lamp of the MCU minimum system is lightened, the MCU minimum system gives an early warning, the drive MOS tube of the MCU minimum system is conducted, the axial flow type ventilation fan rotates to forcibly exhaust the methane, and the accident is prevented.

The utility model discloses an useful part is, this methane early warning explosion-proof equipment utilizes the solar energy power supply, natural draft at ordinary times, and methane sensor on-line measurement septic tank inside methane concentration, if concentration is greater than the explosion threshold value, MCU minimum system control axial-flow ventilation fan forced draft can in time discharge methane gas, can effectively prevent the septic tank enclosure's explosion accident from producing. The device also has the advantages of explosion prevention, reliability, low price, convenient installation and long-term durability.

Claims (2)

1. A methane explosion-proof device of a solar forced ventilation septic tank is characterized by comprising a septic tank, an exhaust pipeline, a ventilation pipeline, an axial flow type ventilation fan, a ventilation hole, a solar cell panel, a storage battery, a voltage stabilizing module, an MCU minimum system, a methane sensor, an MOS (metal oxide semiconductor) tube and a red/green LED (light emitting diode) lamp; the exhaust pipeline is erected on the septic tank, the lower part of the exhaust pipeline is communicated with a gas layer in the septic tank, and the upper part of the exhaust pipeline is connected with the ventilation pipeline; installing an axial-flow type ventilation fan in the ventilation pipeline, installing a methane sensor above the axial-flow type ventilation fan, and arranging 8 ventilation holes at intervals of 45 degrees on the wall of the ventilation pipeline at the upper part of the methane sensor; the ventilation pipeline at the upper part of the ventilation hole is arranged into a sealing surface with an elevation angle of 30 degrees, the sealing surface with the elevation angle of 30 degrees faces south, and the included angle between the normal line of the sealing surface and the downward vertical direction is 30 degrees; a solar cell panel with an elevation angle of 30 degrees towards the south is arranged on the sealing surface with the elevation angle of 30 degrees.

2. The solar forced ventilation septic tank methane explosion-proof device of claim 1, wherein said solar panel is electrically connected to the storage battery, the positive electrode of the storage battery is electrically connected to the D pole of the MOS transistor, the S pole of the MOS transistor is electrically connected to one end of the axial flow ventilation fan motor, and the other end of the axial flow ventilation fan motor is electrically connected to the negative electrode of the storage battery; the storage battery is electrically connected with the voltage stabilizing module, and the voltage stabilizing module is electrically connected with the MCU minimum system; the MCU minimum system is electrically connected with the red/green lamp, the grid electrode of the MOS tube and the methane sensor.

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