CN209759401U - Simple device for collecting, purifying, storing and conveying methane - Google Patents

Abstract

the utility model provides a device that simply collects purification storage and carry marsh gas which characterized in that: comprises a gas collecting hood, a purifying tank, a pressurizing tank, a sealing film and a pump; the gas collecting channel is an open container, the opening of the gas collecting channel is placed downwards in the purification tank, the pressurizing tank is an open container, the opening of the pressurizing tank is upwards installed on the gas collecting channel, and the bottom of the gas collecting channel and the bottom of the pressurizing tank is provided with a liquid seal tank. The cleaning agent is contained in the purifying tank, the sealing film covers the liquid level of the pond, the sealing film is internally connected with the gas collecting hood through a gas collecting pipe and a gas pipe, the pressurizing tank is connected with the gas collecting hood through a return pipe, and the bottom of the purifying tank is connected with the pressurizing tank through a pump and a liquid conveying pipe. The utility model discloses simple structure, convenient operation, the marsh gas to production in the pond that can be fine is collected and is purified storage and transport, reaches energy-concerving and environment-protective purpose.

Description

Simple device for collecting, purifying, storing and transporting biogas

technical field

The utility model belongs to the field of new energy and environmental protection, and in particular relates to a device for simply collecting, purifying, storing, and transporting methane for controlling the odor of sewage rotten ponds and septic tanks.

Background technique

Biogas: It is a combustible gas produced by microbial fermentation of organic matter in an anaerobic environment under certain conditions of temperature, humidity, and pH. Because this gas was first found in swamps, lakes, and ponds, people called it biogas. Biogas is a mixed gas whose main component is methane, followed by carbon dioxide, hydrogen sulfide (H ₂ S), ammonia and other components. In the composition of biogas, combustible components include gases such as methane, hydrogen sulfide, carbon monoxide and heavy hydrocarbons; non-combustible components include gases such as carbon dioxide, nitrogen and ammonia.

The odor emitted by open sewage rotten ponds and septic tanks that seriously affects the surrounding environment is methane. The method of existing simple and easy control bad smell is: above-mentioned pond is covered with film or cement block, with vent pipe, bad smell is sent into the air. This treatment method not only pollutes the atmospheric environment, but also wastes biogas resources.

Utility model content

The purpose of the utility model is to provide a low-cost, easy-to-operate device for collecting, purifying, storing and transporting biogas. The utility model is characterized in that the liquid surface of a pond producing methane is covered with a thin film, and the methane is collected, purified, stored and transported by a drainage method with adjustable pressure.

In order to achieve the above object, the utility model adopts the following technical solutions:

A simple device for collecting, purifying, storing and transporting biogas, including a gas collecting hood, a purification tank, a booster tank, a sealing membrane, and a pump; the gas collecting cover is an open container, and its opening is placed in the purification tank, The cleaning tank is filled with washing liquid, the pressurized tank is an open container, and its opening is installed on the gas collecting hood upwards, the sealing film is covered on the liquid surface of the pond, and its surroundings are fixed by liquid seals Below the liquid level, in order to collect the methane produced in the pond and prevent the methane from escaping; both the top wall of the gas collecting hood and the bottom wall of the booster tank are provided with a through hole one, and the through hole A closed round tube protruding into the bottom end of the gas collecting hood is installed inside, and the round tube forms a liquid seal groove;

There are two through holes in the opposite direction on the upper part of the side wall of the gas collecting hood, which are respectively through hole two and through hole three. The lower part of the side wall of the pressurizing tank is opened on the side corresponding to through hole two. A return pipe is connected to the second through hole, and the return pipe passes through the fourth through hole and enters the booster tank and extends into the bottom of the liquid seal tank. A return valve is installed on the return pipe. The return valve is located outside the pressurization tank; the through hole is connected with an air pipe at three places, and the air pipe is connected with a vent valve and an air supply valve, and the air pipe extends from the upper part of the pressurization tank into the The pressurized tank is connected with a gas collecting pipe and a liquid-sealed pipe, and the connection of the three forms a tee. The tee is located at the upper port of the liquid-sealed tank at the bottom of the pressurized tank. The air collecting pipe passes through the side wall of the booster tank and extends into the pond under the sealing film, and the mouth of the air collecting pipe extending into the pond is located above the liquid level of the pond and below the sealing film, and the liquid sealing The pipe extends into the bottom of the liquid seal tank;

A pump is installed under the outer side of the purification tank, the inlet and outlet of the pump are connected with an infusion tube, the infusion tube at the inlet of the pump is connected with the side of the purification tank, and the infusion tube at the outlet of the pump is connected from the booster tank The top extends into the booster groove.

Further, a number of buoyancy rings are installed on the lower part of the side wall of the air collection hood, and the buoyancy generated by the buoyancy rings and the air collection hood immersed in the washing liquid of the purification tank is equal to the overall weight of the booster tank, the air collection hood and its upper accessories , and the buoyancy ring can be inflated and deflated or the buoyancy material can be increased or decreased.

Further, a liquid distributor is arranged under the top wall of the gas collecting hood, and the return pipe is connected to the liquid distributor through the second through hole.

Further, a float control switch is installed above the pressurization tank, and the float control switch controls the start and stop of the pump.

Further, the air collecting pipe, the air pipe, and the infusion tube are made of hose material and have a certain length, which is convenient for the lifting of the booster tank and the air collecting hood.

Further, the return valve, the vent valve and the air supply valve are arranged above the gas collecting hood.

Beneficial effects of the utility model: the utility model has a simple overall structure and low manufacturing cost, uses the sealing film to cover the pond and collects the liquid through the pressure generated by the accumulation of biogas itself, avoids the pollution of the pond biogas to the air and recovers useful energy; then Then, the purpose of pressurized transportation is achieved through the circulation of the washing liquid in the purification tank and the booster tank, and the biogas is purified by means of backflow. In the whole process of biogas collection, purification, storage and transportation, it is only necessary to start the pump. Consumption of electricity without any other energy waste, to achieve the purpose of energy saving and environmental protection.

Description of drawings

In order to illustrate the technical solution of the utility model more clearly, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below, obviously, the accompanying drawings in the following description are only some embodiments of the utility model, For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the overall structure schematic diagram of the utility model biogas device;

In the figure: 1 pond, 2 overflow port, 3 liquid seal, 4 sealing film, 5 gas collecting pipe, 6 float control switch, 7 return valve, 8 gas collecting hood, 9 purification tank, 10 buoyancy ring, 11 liquid seal tank , 12 return pipe, 13 liquid seal pipe, 14 distributor, 15 vent valve, 16 air supply valve, 17 booster tank, 18 air pipe, 19 pump.

Detailed ways

As shown in Figure 1, the utility model is a simple device for collecting, purifying, storing and transporting biogas, which includes a gas collecting hood 8, a purification tank 9, a booster tank 17, a sealing film 4, and a pump 19. The gas collection hood 8 is an open container, and its shape can be cylindrical or cuboid, and its opening is placed downwards in the purification tank 9, which is filled with washing liquid, and the purification tank 9 The depth is greater than the height of the gas collecting hood 8, and the depth of the washing liquid in the purification tank 9 is also greater than the height of the gas collecting hood 8. A number of buoyancy rings 10 are evenly installed below the side walls of the gas collecting hood 8, and the buoyancy produced by the buoyancy rings 10 and the gas collecting hood 8 being immersed in the washing liquid of the purification tank 9 is equal to the pressure booster tank 17 and the gas collecting hood 8 and their buoyancy. The overall weight of the upper fittings, and the buoyancy ring 10 is an inflatable and deflatable type or a buoyancy material type. Increase or decrease the buoyancy material to make the air collection cover 8 float up and just leave the purification tank 9 bottoms.

The pressurization groove 17 is the same shape as the gas collecting hood 8, its size is smaller than or equal to the size of the gas collecting hood 8, its opening is installed upwards on the gas collecting hood 8, and the connection between the two is sealed. The sealing film 4 is covered on the liquid surface of the pond 1, and its edge is fixed by a liquid sealing strip 3. The liquid sealing strip 3 is made of wooden strips, iron strips or bamboo strips, and the sealing film 4 edges wrap the liquid sealing strip 3 rolls Lift up and fix with rope or frame, sealing film 4 is covered on pond 1 liquid surface, and its covering liquid surface can be whole pond 1 liquid surface also can be pond 1 partial liquid surface. The sealing film 4 covering the liquid surface of the pond 1 can collect the methane produced in the pond 1, and the liquid seal 3 prevents the methane from escaping.

The two corresponding positions of the top wall of the gas collection hood 8 and the bottom wall of the pressurization groove 17 are all provided with a through hole one, and two through holes one connect the gas collection cover 8 and the pressure booster groove 17 together. connected, the two through-holes are installed with a closed round tube extending into the bottom end of the gas collecting hood 8, the round tube forms a liquid seal groove 11, and the upper part of the round tube is connected to the booster groove 17 The bottom wall is flush and sealed here to prevent liquid leakage, and the lower end of the liquid seal groove 11 is flush with the lower end of the gas collecting hood 8 .

There are two through holes in the opposite direction above the side wall of the gas collecting hood 8, namely the second through hole and the third through hole, and the second through hole and the third through hole are close to the upper top wall of the gas collecting hood 8, so There is a through hole four on the side below the side wall of the booster tank 17 corresponding to the through hole two, and the through hole four is close to the lower bottom wall of the booster tank 17; Pipe 12, the return pipe 12 enters the pressurization tank 17 through the through hole 4 and extends into the bottom of the liquid seal tank 11, a return valve 7 is installed on the return pipe 12, and the return valve 7 is located outside the pressurization tank 17, its position is higher than the gas collection hood 8, a liquid distributor 14 is arranged below the upper top wall of the gas collection hood 8, and the liquid distributor 14 is evenly distributed with a plurality of A sieve plate with small holes, the return pipe 12 is connected to the liquid distributor 14 through the second through hole. An air pipe 18 is connected at three places of the through hole, and the air pipe 18 is connected with a vent valve 15 and an air supply valve 16, and the rear end of the air supply valve 16 can be connected with gas equipment. The joints of said through hole 1, through hole 2, through hole 3, and through hole 4 are sealed with pipelines to prevent liquid leakage.

The air pipe 18 extends into the pressurized tank 17 from the top of the pressurized tank 17 and is connected with a gas collecting pipe 5 and a liquid-sealed pipe 13, where the three are connected to form a three-way place, and the three-way Located at the upper port of the liquid seal tank 11 at the bottom of the pressurization tank 17, the gas collecting pipe 5 passes through the side wall of the pressurization tank 17 and extends into the pond 1 under the sealing film 4, The mouth of the air collecting pipe 5 extending into the pond 1 is located above the liquid surface of the pond 1 and below the sealing film 4, and the liquid seal pipe 13 extends into the bottom of the liquid seal tank 11. Preferably, the return pipe 12 One end inserted into the liquid seal groove 11 is flush with the bottom end of the liquid seal pipe 13 and is located at the bottom of the liquid seal groove 11 .

A pump 19 is installed below the outer side of the purification tank 9, and the inlet and outlet of the pump 19 are connected with an infusion tube. Extending into the booster tank 17 from above the booster tank 17 , the washing liquid in the purification tank 9 is extracted by the pump 19 and delivered to the booster tank 17 . A float control switch 6 is installed above the pressurization tank 17, and two suspended floats are arranged at the bottom of the float control switch 6, and the float balls are placed in the pressurization tank 17 to be connected with the booster tank 17. There is a certain distance at the bottom of the pressure tank 17. When the pump 19 transports the cleaning liquid from the purification tank 9 to the booster tank 17, the liquid level in the booster tank 17 rises. When the cleaning liquid level rises to submerge the two floating balls , the float control switch 6 sends a signal to stop the pump 19, and when the washing liquid level in the booster tank 17 drops to expose two floats, the float control switch 6 sends a signal to start the pump 19. Said pump 19 is also provided with another cover control switch simultaneously, and pump 19 energizes to start when this cover control switch is opened, and now float control switch 6 can control the start and stop of pump 19; Pump 19 power-off when this cover control switch is closed stop, at this time the float control switch 6 cannot control the start and stop of the pump 19.

Preferably, the air collecting pipe 5, the air pipe 18, and the infusion tube are made of hose material and have a certain length, which is convenient for the gas collecting hood 8 and pressurization tank 17 when biogas enters the gas collecting hood 8. Ascent, when the biogas in the gas collecting hood 8 is exhausted, it is convenient for the gas collecting hood 8 and pressurization tank 17 to descend.

The operation method of the utility model device comprises as follows:

Step 1, open the vent valve 15, close the air supply valve 16 and the return valve 7;

Step 2, add washing liquid into the purification tank 9, the washing liquid enters the inside of the gas collecting hood 8 at the same time, the air inside the air collecting hood 8 is discharged by the vent valve 15, and continue to add the washing liquid until the return valve 7 is submerged. Air cover 8 is all submerged, inflate in buoyancy ring 10 or increase the buoyancy material of buoyancy ring 10 to make described air collection cover 8 just leave the bottom of decontamination tank 9 under buoyancy;

Step 3: Open the backflow valve 7 to a certain degree of opening. Since the washing liquid submerges the backflow valve 7, the washing liquid in the gas collection hood 8 will enter the liquid seal tank 11 through the return pipe 12. At this time, the overall weight of the upper part increases, which is greater than Due to the overall buoyancy force, the gas collecting hood 8 sinks to the bottom of the purification tank 9;

Step 4, close the vent valve 15, fix the gas collecting pipe 5 in the pond 1, make its nozzle exposed to the liquid surface of the pond 1, cover the sealing film 4 and the liquid seal 3 on the liquid surface of the pond 1, and the liquid seal 3 will seal The edge of the film 4 sinks into the water for a certain distance; biogas is generated in the pond 1, and due to the continuous accumulation of biogas, the biogas in the sealed film 4 will discharge the liquid therein, and the pressure will continue to rise. In the gas collecting hood 8, at the same time, the methane discharges the washing liquid inside the gas collecting hood 8, the gas collecting hood 8 floats up, and the methane continuously accumulates in the gas collecting hood 8. In practice, it is assumed that the maximum pressure of biogas generated in the sealing film 4 is R, The utility model controls the pressure of the biogas collected by the gas collecting hood 8 to be H, and controls H≤R/2, and controls the gas collecting hood 8 to float to a certain height in the washing liquid according to the pressure of the biogas collected in the gas collecting hood 8 . In addition, the washing liquid is selected from lye or acid according to the impurities contained in the biogas in the pond 1. When the biogas in the pond 1 is mainly carbon dioxide and hydrogen sulfide acid gas impurities, the washing liquid is lye; When the biogas mainly contains ammonia-like alkaline gas impurities, acid liquid is used in the washing tank. The proportion of impurity gases such as carbon dioxide, hydrogen sulfide or ammonia usually contained in biogas is larger than that of methane, the main component of biogas, and is easily soluble in alkali or acid. They will partially sink to the bottom of purification tank 9 and be absorbed by washing liquid, reaching The purpose of preliminary biogas purification;

Step 5, turn on the control switch of the pump 19 to connect to the power supply, start the pump 19, and open the air supply valve 16 at the same time, the pump 19 will transport the washing liquid in the purification tank 9 to the booster tank 17 through the infusion tube, and then pressurize The liquid level in the tank 17 rises, and the weight of the upper part increases so that the biogas pressure inside the gas collecting hood 8 continues to rise. The cleaning liquid enters the air pipe 18 and the air collecting pipe 5 so that the biogas can no longer circulate in the air pipe 18 and the air collecting pipe 5; in addition, because the liquid level in the booster tank 17 rises, the washing liquid will pass through the return pipe from the bottom of the liquid seal tank 11 12 flows to the liquid distributor 14, and the biogas in the gas collecting hood 8 is sprayed and purified through the liquid distributor 14; Stop the pump 19 under control, and the washing liquid will continuously flow back to the inside of the gas collecting hood 8 from the return pipe 12, and the liquid level in the booster tank 17 will be reduced to the point where the two floats of the float control switch 6 are exposed to the liquid surface. At this time, the float control The switch 6 controls the start of the pump 19, so that the biogas in the gas collecting hood 8 is repeatedly pressurized. It should be noted here that the delivery flow rate of the pump 19 designed in the utility model is much greater than the flow rate of the return flow, so as to prevent the return flow from being too large to pressurize. , at the same time control the start and stop time of the pump 19 to have a certain interval, and in addition, with the continuous reduction of biogas in the gas collection hood 8, the gas collection hood 8 will continue to descend in the purification tank 9 until the biogas is exhausted. The gas collection hood 8 sinks to the purification tank again At the end of 9, biogas collection can be carried out again at this time;

Step 6, close the air supply valve 16, turn off the power supply of the pump 19, and the washing liquid in the booster tank 17 will be completely returned to the purification tank 9 by the return pipe 12 within a certain period of time. The tee place is exposed, and the washing liquid is discharged from the air pipe 18 and the gas collecting pipe 5, and the biogas enters the gas collecting hood 8 from the air collecting pipe 5 and the air pipe 18 again to be collected.

In steps 1 to 6, when all parameters are adjusted normally, the system will automatically collect biogas when not using biogas; when using biogas, only need to turn on the pump 19 to control the switch to turn on the power and open the gas supply valve 16 to realize Ready-to-use biogas.

Claims (6)

1. A simple device for collecting, purifying, storing and transporting biogas, characterized in that: it includes a gas collecting hood, a purification tank, a booster tank, a sealing film, and a pump; the gas collecting hood is an open container, and its opening is placed downwards In the purification tank, the cleaning liquid is filled in the purification tank, the opening of the booster tank is installed on the gas collecting cover, the sealing film is covered on the liquid surface of the pond, and its surroundings are fixed by liquid seals Below the liquid level, in order to collect the methane produced in the pond and prevent the methane from escaping; both the top wall of the gas collecting hood and the bottom wall of the booster tank are provided with a through hole one, and the through hole A closed round tube protruding into the bottom end of the gas collecting hood is installed inside, and the round tube forms a liquid seal groove; There are two through holes in the opposite direction on the upper part of the side wall of the gas collecting hood, which are respectively through hole two and through hole three. The lower part of the side wall of the pressurizing tank is opened on the side corresponding to through hole two. A return pipe is connected to the second through hole, and the return pipe passes through the fourth through hole and enters the booster tank and extends into the bottom of the liquid seal tank. A return valve is installed on the return pipe. The return valve is located outside the pressurization tank; the through hole is connected with an air pipe at three places, and the air pipe is connected with a vent valve and an air supply valve, and the air pipe extends from the upper part of the pressurization tank into the The pressurized tank is connected with a gas collecting pipe and a liquid-sealed pipe, and the connection of the three forms a tee. The tee is located at the upper port of the liquid-sealed tank at the bottom of the pressurized tank. The air collecting pipe passes through the side wall of the booster tank and extends into the pond under the sealing film, and the mouth of the air collecting pipe extending into the pond is located above the liquid level of the pond and below the sealing film, and the liquid sealing The pipe extends into the bottom of the liquid seal tank; A pump is installed under the outer side of the purification tank, the inlet and outlet of the pump are connected with an infusion tube, the infusion tube at the inlet of the pump is connected with the side of the purification tank, and the infusion tube at the outlet of the pump is connected from the booster tank The top extends into the booster groove. 2. A simple device for collecting, purifying, storing and transporting biogas according to claim 1, characterized in that: the return valve, the vent valve and the gas supply valve are arranged above the gas collecting hood. 3. A simple device for collecting, purifying, storing and transporting biogas according to claim 1 or 2, characterized in that several buoyancy rings are installed on the lower part of the side wall of the gas collection hood, and the buoyancy rings and the gas collection hood are immersed in the purification The buoyancy produced in the washing liquid of the tank is equal to the overall weight of the pressurized tank, the air collecting cover and its upper fittings, and the buoyancy ring can be filled with air or can increase or decrease the buoyancy material. 4. A simple device for collecting, purifying, storing and transporting biogas according to claim 3, characterized in that: a liquid distributor is arranged under the top wall of the gas collecting hood, and the return pipe passes through the second through hole and The liquid distributors are connected. 5. A simple device for collecting, purifying, storing and transporting biogas according to claim 4, characterized in that a float control switch is installed above the booster tank, and the float control switch controls the start and stop of the pump. 6. A simple device for collecting, purifying, storing and transporting biogas according to claim 5, characterized in that: the air collecting pipe, the air pipe, and the infusion pipe are made of hose material and have a certain length, which is convenient for the increasing Pressure tank and air collection hood lift.