CN107883187A - Biogas length washs the method and device of storage away from minute-pressure conveying nearby - Google Patents

Abstract

The invention discloses a method and a device for long-distance micro-pressure transportation of methane and nearby washing and storage, which solves the problems of limited gas storage space, difficulty in transportation, and impact on the environment in existing methane digesters. Its feature is to use the micro-pressure generated by the biogas digester to transport the biogas to the vicinity of the user slowly and continuously for a long distance in 24 hours through ordinary normal-pressure pipelines, and use the micro-pressure liquid drainage method to collect and wash the gas for storage for later use. The beneficial effect of the invention is that the problem of transporting and storing the methane in the existing large-scale methane pond can be solved only by using cheap equipment, and the environmental protection effect is also achieved.

Description

Method and device for long-distance micro-pressure transportation of biogas and nearby washing and storage

technical field

The invention belongs to the field of new energy and environmental protection, and in particular relates to a method and a device for long-distance micro-pressure transportation of biogas from large-scale biogas ponds in farms and nearby washing and storage.

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.

Most of the current biogas does not remove harmful gases such as hydrogen sulfide and ammonia before use, which will cause a certain degree of pollution to the environment; the current biogas digesters still have limited gas storage space, resulting in the release of biogas, which is a waste of resources and affects the environment; my country's aquaculture industry More and more large-scale, large-scale. In order to prevent animal excrement from affecting the living environment of residents, large-scale breeding farms generally have a certain distance from residential areas. This makes it difficult for the state to support the biogas produced by the large-scale biogas digesters established in large-scale farms to supply the surrounding residents for use. If it is liquefied at high pressure, it will be bottled and supplied to users, which is too costly; if it is transported under pressure, the cost of pressure-resistant pipelines, transmission power and management is not small, and in the peak period of use, there is often insufficient air pressure, which cannot be used normally. According to the survey, because the current technology does not solve the problem of transportation, most of the large-scale biogas digesters that have been built have not played their due role like the small household biogas digesters, or they have been abandoned after the state paid for them.

Contents of the invention

The purpose of the present invention is to provide a low-cost, easy-to-use method and device for long-distance micro-pressure transportation of methane and nearby washing and storage. The feature of the present invention is to use the micro-pressure generated by the biogas digester to transport the biogas to the vicinity of the user slowly and continuously over a long distance for 24 hours through ordinary normal-pressure pipelines, and use the micro-pressure liquid discharge method to collect and store the gas for later use.

Embodiments of the present invention are achieved like this:

A biogas long-distance, micro-pressure transportation and nearby washing and storage device is composed of a gas storage scrubber, a washing liquid tank, a pump and a floating head, etc. The gas storage scrubbing tower is placed above the washing liquid tank and overlaps with the washing liquid tank , the top of which is equipped with an outlet pipe with a vent valve, an inlet pipe with an inlet valve, and a liquid seal pipe with a liquid seal groove, and the overlapping part of the bottom is provided with a discharge pipe with a liquid discharge valve and a gas collection and liquid discharge valve, inserting the washing machine The gas collection and discharge pipe at the bottom of the liquid pool has a built-in floating head with a hose. Connect the hose on the floating head to the gas collection and discharge pipe. Open a hole for people to enter and exit on the side of the bottom, and set a tower cover. The outlet pipe of the pump passes through The wall of the gas-storage scrubber is connected with the nozzle on the top, and the inlet pipe passes through the wall of the tank and is inserted into the bottom of the washing liquid pool. The volume of the washing liquid pool is larger than that of the gas-storage scrubber. The floating head is to insert a part of the hard tube whose length is within 20% of the height of the plastic bottle into the inverted plastic bottle, and the lower end of the hard tube is exposed outside the bottle and connected to a hose whose length is within 20% of the height of the gas storage scrubber. ,Fix the plastic bottle on the hard tube, drill 2-5 holes on the wall of the plastic bottle near the mouth of the bottle, tie a float on the upper part of the outer wall of the plastic bottle, so that the inner hard tube mouth of the inverted plastic bottle with a hose is exposed to the liquid surface, The preferred height exposed to the liquid surface is 50-150mm.

The operation steps of a method for long-distance micro-pressure transportation of biogas for nearby washing and storage are as follows:

1) Connect the intake pipe of the biogas long-distance micro-pressure transport to the nearest washing storage device with the large biogas digester, and add an appropriate amount of washing liquid to the liquid seal tank and washing liquid pool;

2) Close the intake valve and liquid discharge valve first, open the vent valve and gas collection and liquid discharge valve, and then start the pump. When the floating ball in the washing liquid tank leaves the liquid surface, the pump will automatically close;

3) Close the vent valve first, then open the intake valve, and the biogas enters the gas storage scrubber. When the biogas pressure in the tower is greater than the liquid level difference between the inside and outside of the floating head, liquid flows out from the gas collection and discharge pipe, and the gas storage scrubber continues to flow out. Accumulate biogas until the tower is full of biogas;

4) Before using biogas, first close the intake valve and gas collection and discharge valve, then start the pump, and the washing liquid in the washing liquid tank is sprayed out through the nozzle to wash the biogas and pressurize;

5) When the biogas pressure in the gas storage scrubber increases to a floating ball submerged in the liquid seal tank, start to use biogas;

6) When the biogas pressure in the gas storage scrubber increases to the point where both floating balls in the liquid seal tank are submerged, the pump will automatically shut down;

7) When biogas is used, the pressure of biogas in the gas storage scrubber drops to the point where the two floating balls in the liquid seal tank leave the liquid level, the pump starts automatically and pressurizes;

8) When the biogas is disabled, first open the gas collection and discharge valve, the liquid in the gas collection and discharge pipe flows out, release the pressure, then open the intake valve, the biogas enters the gas storage scrubber, when the pressure of the biogas in the tower is greater than the inside and outside of the floating head When the liquid level is different, liquid flows out from the gas collecting and discharging pipe, and biogas accumulates in the gas storage scrubber until the tower is full of biogas.

The beneficial effect of the invention is that the problem of transporting and storing the methane in the existing large-scale methane pond can be solved only by using cheap equipment, and the environmental protection effect is also achieved.

The present invention will be further described below in conjunction with accompanying drawing.

Description of drawings:

In order to illustrate the technical solution of the present invention 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 inventor. For the present invention Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a structural schematic diagram of the present invention.

In the figure: 1 is the nozzle, 2 is the vent valve, 3 is the intake valve, 4 is the floating head, 5 is the float, 6 is the hose, 7 is the drain valve, 8 is the pump, 9 is the gas storage scrubber, 10 is the Gas collection and liquid discharge valve, 11 is washing liquid tank, 12 is tower cover, 13 is liquid level controller, 14 is pressure controller, and 15 is liquid seal tank.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

A biogas long-distance, micro-pressure transportation and nearby washing and storage device is shown in the figure. It is composed of a gas storage scrubber 9, a washing liquid pool 11, a pump 8, and a floating head 4. The gas storage scrubbing tower 9 is placed in the washing liquid pool 11. Above, and a small part overlaps with the washing liquid pool 11, the top of which is provided with an outlet pipe with a vent valve 2, an air inlet pipe with an air inlet valve 3, and a liquid seal pipe with a liquid seal groove 15, and a liquid discharge pipe with a liquid discharge pipe on the overlapping part of the bottom surface. The discharge pipe of the valve 7 and the gas collection and discharge valve 10 are inserted into the gas collection and discharge pipe at the bottom of the washing liquid tank 11, and the floating head 4 with the hose 6 is built in, and the hose 6 on the floating head 4 is connected with the gas collection and discharge The pipe is connected, the bottom side is opened with a hole that people can enter and exit, and a tower cover 12 is set, the outlet pipe of the pump 8 passes through the wall of the gas storage scrubber 9 and is connected to the nozzle 1 on the top, and the inlet pipe passes through the pool wall and inserts into the bottom of the washing liquid pool 11, The volume of the washing liquid pool 11 is greater than that of the gas storage scrubber 9 . The floating head 4 is to insert a part of the hard pipe whose length is less than 20% from the height of the plastic bottle into the inverted plastic bottle, and the lower end of the hard pipe is exposed outside the bottle and connected to a soft pipe whose length is less than 20% from the height of the gas storage scrubber. Tube 6, fix the plastic bottle on the hard tube, drill 2-5 holes on the wall of the plastic bottle near the mouth of the bottle, tie the float 5 on the upper part of the outer wall of the plastic bottle, and expose the inner hard tube mouth of the inverted plastic bottle with hose Liquid surface, the preferred height exposed to the liquid surface is 50-150mm.

Implement the operating steps of the present invention as follows:

1) Connect the intake pipe 3 of the biogas long-distance micro-pressure transport to the nearby washing storage device with the large-scale biogas digester, and add an appropriate amount of washing liquid to the liquid seal tank 15 and the washing liquid tank 11;

2) First close the intake valve 3 and the liquid discharge valve 7, open the vent valve 2 and the gas collection and discharge valve 10, and then start the pump 8. When the floating ball in the washing liquid tank 11 leaves the liquid surface, the liquid level controller 13 will Pump 8 shuts off automatically;

3) First close the vent valve 2, then open the intake valve 3, the biogas enters the gas storage scrubber 9, when the biogas pressure in the tower is greater than the liquid level difference between the inside and outside of the floating head 4, liquid flows out from the gas collection and discharge pipe, and the gas storage Biogas is continuously accumulated in the washing tower 9 until the tower is full of biogas;

4) Before using the biogas, first close the intake valve 3 and the gas collection and discharge valve 10, then start the pump 8, and the washing liquid in the washing liquid pool 11 is sprayed out through the nozzle 1 to wash the biogas and pressurize;

5) When the biogas pressure in the gas storage scrubber 9 increases to a floating ball submerged in the liquid seal tank 15, start to use biogas;

6) When the biogas pressure in the gas storage scrubber 9 increases to the point where both floating balls in the liquid seal tank 15 are submerged, the pressure controller 14 makes the pump 8 automatically shut down;

7) When biogas is used, the pressure of the biogas in the gas storage scrubber 9 drops to the point where the two floating balls in the liquid seal tank 15 leave the liquid level, and the pressure controller 14 automatically starts the pump 8 to increase the pressure;

8) When the biogas is disabled and biogas needs to be collected, first open the gas collection and discharge valve 10, the liquid in the gas collection and discharge pipe flows out, and the pressure is released, and then open the intake valve 3, and the biogas enters the gas storage scrubber 9, when the tower When the biogas pressure is greater than the liquid level difference between the inside and outside of the floating head, there is liquid flowing out from the gas collecting and discharging pipe, and the biogas is continuously accumulated in the gas storage scrubber 9 until the tower is full of biogas.

Claims (3)

1. a kind of method that biogas length washs storage nearby away from minute-pressure conveying, it is characterized in that using minute-pressure caused by methane-generating pit, By common normal pressure pipeline, slowly continuously biogas is transported near user over long distances within 24 hours, with minute-pressure fluid-discharge therapy gas collection Stored for future use, its operating procedure are as follows：

1) air inlet pipe (3) that biogas length is conveyed to washing storage facility nearby away from minute-pressure is connected with large methane tank, to liquid seal trough (15) and washing lotion pond (11) add appropriate cleaning solution；

2）Intake valve (3) and tapping valve (7) are first closed, opens atmospheric valve (2) and gas collection tapping valve (10), starts pump (8) afterwards, when When washing lotion pond (11) inner float ball leaves liquid level, fluid level controller (13) makes pump (8) close automatically；

3）Atmospheric valve (2) is first closed, opens intake valve (3) afterwards, biogas enters air storage scrubbing tower (9), when biogas pressure is big in tower In raise the nose above water to breathe (4) inside and outside liquid level difference when, have liquid outflow in gas collection discharging tube, air storage scrubbing tower constantly gathers biogas in (9), arrived Untill when being full of biogas in tower；

4）Before biogas, intake valve (3) and gas collection tapping valve (10) are first closed, starts pump (8), washing in washing lotion pond (11) afterwards Liquid sprays through shower nozzle (1), washs biogas, and be pressurized；

5）When air storage scrubbing tower (9) interior biogas pressure increases to a ball float floods in liquid seal trough (15) when, start to use biogas；

6）When air storage scrubbing tower (9) interior biogas pressure increases to two ball floats all flood in liquid seal trough (15) when, pressure controller (14) pump (8) is made to close automatically；

7）When using biogas, making air storage scrubbing tower (9) interior biogas pressure drop to two ball floats in liquid seal trough (15) and all leave liquid level When, pressure controller (14) makes pump (8) automatic start, supercharging；

8）When disabling biogas and needing to gather biogas, gas collection tapping valve (10) is first opened, has liquid outflow in gas collection discharging tube, lets out Pressure, intake valve (3) is opened afterwards, biogas enters air storage scrubbing tower (9), when biogas pressure is more than (4) inside and outside liquid level difference of raising the nose above water to breathe in tower When, there is liquid outflow in gas collection discharging tube, air storage scrubbing tower constantly gathers biogas in (9), untill when biogas is full of in tower.

2. a kind of biogas length for described in claim 1 washs the device of the method for storage, its feature away from minute-pressure conveying nearby It is：Including air storage scrubbing tower（9）, washing lotion pond（11）, pump (8) and raise the nose above water to breathe (4), air storage scrubbing tower (9) is placed in washing lotion pond (11) Top, and have with washing lotion pond (11) that fraction is overlapping, its top sets the escape pipe with atmospheric valve (2), entering with intake valve (3) Tracheae and the liquid sealing pipe with liquid seal trough (15), bottom surface lap set the discharging tube with tapping valve (7) and with gas collection tapping valves (10) the gas collection discharging tube at washing lotion pond (11) bottom, the floating head (4) of built-in band flexible pipe (6), by the flexible pipe (6) on (4) of raising the nose above water to breathe, are inserted It is connected with gas collection discharging tube, bottom sides open the hole that people can pass in and out, and set tower lid (12), and the outlet of pump (8) passes through air storage Scrubbing tower (9) wall is connected with its top showerhead (1), and inlet tube inserts washing lotion pond (11) bottom through pool wall, washing lotion pond (11) Volume is more than the volume of air storage scrubbing tower (9).

3. biogas length according to claim 2 washs storage facility nearby away from minute-pressure conveying, it is characterised in that：The floating head (4) it is that the part insertion that length is highly differed to the hard tubulation within 20% with plastic bottle is inverted in plastic bottle, hard tubulation lower end Expose bottle outer portion and connect length and air storage washing tower height degree and differ flexible pipe (6) within 20%, plastic bottle is fixed on hard tubulation On, plastics bottle wall bores 2-5 hole close to bottle mouth position, and plastic bottle outer wall top binds float (5), makes the inversion plastic bottle with flexible pipe Interior hard tubulation mouth exposes liquid level, and the preferred height for exposing liquid level is 50-150mm.