CN209989385U - Device for preparing biogas from simple potato residue - Google Patents

Abstract

A simple device for preparing biogas from potato residues comprises a gas storage washing tower, a high-level tank, a washing liquid pool, a pump, a floating head and a potato residue bag. The gas storage washing tower is installed above the washing pool. The side wall of the washing tower is provided with an air supply valve, a vent valve and a gas collection valve, and a drain valve and a gas collection and liquid discharge valve are installed at the bottom. Inject lye into the pool. The high-level tank is installed on the upper part of the gas storage washing tower, and the bottom thereof is communicated with the gas storage washing tower through a connecting pipe. The gas collecting and draining valve is connected with a floating head through a hose, and the floating head and the hose are located inside the gas storage and washing tower; a pump is installed on the outside of the washing liquid pool, and the pump inlet is connected with the interior of the washing liquid pool through an infusion pipe , the pump outlet is connected to an infusion pipe, the upper part of the infusion pipe extends into the high-level tank from the upper part of the high-level tank, and the pump transports the lye in the washing pool to the high-level tank.

Description

Device for preparing biogas from simple potato residue

technical field

The utility model belongs to the field of biogas preparation, in particular to a device for preparing biogas with simple potato residue.

Background technique

my country is the world's largest producer of potato crops, including sweet potato, potato and cassava. The three major potato species are widely distributed and have large output, with an annual output of nearly 200 million tons. Every year, these tubers are used to produce starch and various fermented products, and the by-products, namely potato residue resources, reach about 100 million tons. Potato dregs are relatively high in crude protein and can be directly fed to animals, but they still contain certain toxins. Sweet potato residue and cassava residue have obvious nutritional deficiencies, that is, the crude protein content is very low, the nutritional value of direct feeding is not large, and the growth of animals is slow. Potato residue is organic waste, which can be used as biogas raw material. However, its main component is crude fiber with high carbon content, and its carbon-nitrogen ratio is generally above 30:1. Therefore, if the raw material of potato residue is used as biogas, the gas production rate will be slow without pretreatment. Due to the difficulty of keeping the potato fresh, the processing time is only over one month. A large number of potato starch extraction, with mechanized operation, can be completed in about a month. To use a large amount of potato residue as biogas in a short period of time requires huge investment to build a large-capacity biogas digester, and the raw materials cannot be supplied for many years, so the biogas cannot be produced for many years. Potato dregs are generally in the form of pulp, and are not treated in many places. They are directly discarded in the mountainside ditches near the processing plant or they are towed away by people at money, and dumped into rivers, canals and fields. Wait until the spring and summer of the second year. If the temperature rises, the generated odor will affect the surrounding area of about 1 km. Such treatment will not only waste raw materials, but also have adverse effects on the environment.

Utility model content

The purpose of this utility model is to provide a low-cost device for preparing biogas from simple potato residues. The utility model is characterized in that the pulpy potato residue mixed with activated sludge is wrapped with an agricultural film at the low recess, and the generated biogas is collected, washed and stored by the micro-pressure drainage method for starch deep processing.

For reaching the above-mentioned purpose, the utility model adopts the following technical scheme:

A simple device for preparing biogas from potato residue, comprising a gas storage washing tower, a high-level tank, a washing pool, a pump, a floating head and a potato residue bag;

The gas storage washing tower is installed above the washing liquid pool, and its bottom part overlaps with the upper part of the washing liquid pool; the upper part of the gas storage washing tower is provided with a vent valve and a gas collecting valve, and the gas collecting The valve is connected with the potato dregs bag through the gas collecting pipe and extends into the potato dregs bag, the potato dregs slurry mixed with activated sludge is placed in the potato dregs bag, and the lye is injected into the washing pool;

The high-level tank is installed on the upper part of the gas storage washing tower, and its bottom is connected with the upper part of the side wall of the gas storage washing tower through a connecting pipe; the overlapping part of the bottom of the gas storage washing tower and the upper part of the washing pool is provided with a drain a liquid valve and a gas collecting and draining valve, the gas collecting and draining valve is connected with a floating head through a hose, and the floating head and the hose are located inside the gas storage and washing tower;

A pump is installed on the outside of the bottom of the lotion tank, the pump inlet is connected to the interior of the lotion tank through an infusion pipe, the pump outlet is connected to an infusion pipe, and the upper part of the infusion pipe extends into the high-level tank from the upper part of the high-level tank middle;

A gas supply valve is installed on the upper part of the side wall of the washing tower.

Preferably, the gas collecting pipe extends into the portion of the potato residue bag, and a plurality of through holes are distributed on the side wall thereof.

Further, a liquid level control switch with two floating balls is installed above the high level tank, and the liquid level control switch can control the start and stop of the pump.

Further, the connecting pipe is a U-shaped pipe, and the end of the connecting pipe connected to the bottom of the high-level tank is higher than the end of the connecting pipe connected to the upper part of the side wall of the gas storage and washing tower.

Further, several spray heads are evenly arranged above the inside of the gas storage washing tower, and one end of the connecting pipe connecting the upper part of the side wall of the gas storage washing tower extends into the interior of the gas storage washing tower and is respectively connected with the several spray heads. connected to the sprinkler heads.

Further, the gas storage washing tower is provided with a baffle plate, and a plurality of through holes are evenly distributed on the baffle plate, and the baffle plate divides the inside of the gas storage washing tower into two parts: left and right, and the floating head and the The hose is on one side of the baffle.

Further, the floating head is composed of a floating bottle, a rigid tube, and several floats, the float is installed on the outer wall of the floating bottle, and the rigid tube is inserted into the floating bottle through the mouth of the floating bottle and inserted into the floating bottle. It is connected with the floating bottle, the bottle mouth of the floating bottle is downward, and the rigid pipe is connected with the hose.

Further, packing and a liquid level gauge are arranged on the other side of the partition plate adjacent to the floating head and the hose in the gas storage washing tower, and a manhole is also provided on the side wall of the gas storage washing tower.

The beneficial effects of the utility model are as follows: the overall structure of the utility model is simple, and the potato residues that need to be discarded are fully utilized to prepare and collect biogas; at the same time, the utility model prepares the biogas from the potato residues, collects the biogas, cleans the biogas, and pressurizes and transports the biogas. Integrated into one, the whole process basically does not require additional energy consumption except for the operation of the pump, achieving energy saving and environmental protection.

Description of drawings

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is the overall structure schematic diagram of the device for preparing biogas from biogas simple potato residue of the present invention;

In the picture: 1 gas collection valve, 2 vent valve, 3 gas supply valve, 4 floating head, 5 float, 6 hose, 7 liquid discharge valve, 8 pump, 9 gas storage and washing tower, 10 gas collection and discharge valve, 11 washing Liquid pool, 12 manholes, 13 liquid level gauges, 14 fillers, 15 connecting pipes, 16 sprinkler heads, 17 high level tanks, 18 liquid level control switches, 19 potato residue bags.

Detailed ways

Example:

As shown in Figure 1, a simple device for preparing biogas from potato residue includes a gas storage scrubber, a high-level tank, a washing pool, a pump, a floating head and a potato residue bag.

The gas storage and washing tower is installed above the washing liquid pool, the bottom of which overlaps with the upper part of the washing liquid pool, and the overlapping part of the washing liquid pool is open. A gas supply valve is installed on the upper part of the side wall of the washing tower, a vent valve is installed on the upper part of the gas storage washing tower, and a gas collecting valve is also provided, and the gas collecting valve is connected with the potato residue bag through a gas collecting pipe and extends into the bag. In the potato dregs bag, preferably, the gas collecting pipe extends into the part of the potato dregs bag, and a number of through holes are distributed on its side wall, and the gas collecting pipe is placed in the potato dregs bag by setting a number of through holes. The potato residue slurry is blocked, and at the same time, the intake area of the gas collecting pipe can be increased, which is convenient for collecting biogas. Potato residue pulp mixed with activated sludge is placed in the potato residue bag, preferably the activated sludge weight ratio is 0.1% to 10%, within this ratio range, the potato residue pulp is under the action of activated sludge. The gas production rate of biogas is not changed much, and a relatively stable gas production rate can be guaranteed. At the same time, lye is injected into the washing liquid pool.

The high-level tank is installed on the upper part of the gas storage washing tower, and its bottom is communicated with the upper part of the side wall of the gas storage washing tower through a connecting pipe. Preferably, the connecting pipe is a U-shaped pipe, and the connecting pipe connects the One end of the bottom of the high-level tank is higher than the end of the connecting pipe connecting the upper part of the side wall of the gas storage and washing tower, and the connecting pipe is designed as a U-shaped pipe, which can play the role of liquid seal when the lye is injected into the connecting pipe. .

The bottom of the gas storage washing tower and the upper part of the washing pool are provided with a drain valve and a gas collection and drain valve. The gas collection and drain valve is connected with a floating head through a hose, and the floating head and the hose are located at the place. The inside of the gas storage and washing tower; the floating head is composed of a floating bottle, a rigid tube, and several floats, the floats are installed on the outer wall of the floating bottle, and one end of the rigid tube is inserted into the floating bottle through the mouth of the floating bottle. The floating bottle is inside and connected with the floating bottle, the bottle mouth of the floating bottle is downward, and the other end of the rigid tube is connected with the hose. The rigid tube is inserted into the floating bottle for a length of time, and the top of the tube is at a certain distance from the upper part of the floating bottle. When liquid enters the gas storage washing tower, the floating head will rise, because the rigid tube will be high. The water at the liquid surface cannot enter the rigid tube; when the floating head rises and touches the top of the gas storage scrubbing tower, the liquid level continues to rise, and the liquid will enter the interior of the floating bottle along the bottle mouth of the floating bottle and then flood the mouth of the rigid tube. At this time, the liquid will enter the hard pipe and then enter the hose and then be discharged through the gas collecting and draining valve.

A pump is installed on the outside of the bottom of the lotion tank, the pump inlet is connected to the interior of the lotion tank through an infusion pipe, the pump outlet is connected to an infusion pipe, and the upper part of the infusion pipe extends into the high-level tank from the upper part of the high-level tank In the process, the pump transports the lye in the lotion tank to the high-level tank. The lye in the high-level tank flows back to the gas storage and washing tower through the bottom connecting pipe, and the delivery flow rate of the pump is designed to be greater than the flow rate of the connecting pipe in the utility model.

A liquid level control switch with two floating balls is installed above the high-level tank. When the pump transports the lye in the washing tank to the high-level tank, the lye liquid level in the high-level tank rises. When the inner lye submerges the two float balls, the liquid level control switch controls the pump to stop; the lye liquid will flow back to the gas storage and washing tower through the connecting pipe, and the liquid level in the high-level tank will drop. The liquid level control switch controls the pump to start, and then sends the lye in the washing liquid tank to the high-level tank.

Several spray heads are evenly arranged above the inside of the gas storage washing tower, and one end of the connecting pipe connected to the upper part of the side wall of the gas storage washing tower extends into the interior of the gas storage washing tower to be respectively sprayed with the several spray heads. The heads are connected, and when the lye flows from the high-level tank to the spray head through the connecting pipe, the biogas in the gas storage scrubbing tower will be cleaned, and the carbon monoxide and hydrogen sulfide in it will be taken out.

The gas storage washing tower is also provided with a baffle plate, and a plurality of through holes are evenly distributed on the baffle plate. The baffle plate divides the inside of the gas storage washing tower into two parts: left and right. on the side of the partition.

The other side of the partition plate adjacent to the floating head and the hose in the gas storage scrubbing tower is provided with packing and a liquid level gauge, and the packing in the gas storage scrubbing tower increases the amount of biogas and the lye sprayed by the top spray head. The contact area is increased, and the cleaning efficiency is accelerated. Set up a liquid level gauge to observe the liquid level in the tower. At the same time, the side wall of the gas storage washing tower is also provided with manholes, which is convenient for the later maintenance of the gas storage washing tower.

The method for preparing biogas by the utility model comprises the following steps:

Step 1, unfold the cylindrical agricultural film, place it in a depression near the starch factory, and tie up one end of the cylindrical agricultural film with a rope to form a potato residue bag; the potato residue bag is covered with an opaque material to avoid Ultraviolet rays in sunlight accelerate the aging of agricultural films.

In step 2, the potato residue slurry is poured into the potato residue bag, and 0.1% to 10% of activated sludge is selectively added to control the speed of biogas production, so that the peak gas production period coincides with the energy consumption period of starch deep processing;

Step 3, extend the part with through holes in the side wall of the gas collecting pipe into the potato dregs bag, and make this part fixed on the surface of the potato dregs slurry in the potato dregs bag; bundle the potato dregs bag to the gas collecting pipe by setting not open hole;

Step 4: As time increases, biogas begins to be generated in the potato residue bag, and the potato residue bag swells. At this time, lye is injected into the washing liquid tank, and then the gas supply valve, the gas collecting valve and the drain valve are closed, and then the empty valve and the drain valve are opened. Collect and drain valve, and then start the pump;

Step 5: The liquid enters the gas storage and washing tower, so that the floating head floats on the liquid surface. When the liquid level rises to the point where the floating head contacts the top of the tower, the floating head no longer rises, and the liquid level continues to rise; After the pipe opening is made, the liquid flows out through the hard pipe opening in the floating bottle and flows out through the hose and the gas collecting and draining valve; at this time, the liquid flushing in the gas storage and washing tower is completed, the pump is stopped, the vent valve is closed, and the gas collecting valve is opened. , the accumulation of biogas in the potato residue bag generates a certain pressure and enters the gas storage scrubber through the gas collecting pipe and gas collecting valve, and the liquid in the tower is discharged through the gas collecting and draining pipe, so that the gas storage scrubbing tower continuously accumulates biogas, and after the tower is filled with biogas , the excess biogas is emptied through the gas collecting and draining valve;

Step 6: Before using the biogas, first close the gas collecting valve and the gas collecting and draining valve, and then start the pump. The pump transports the lye in the washing tank to the high-level tank, and the lye in the high-level tank enters the gas storage and washing through the connecting pipe. In the tower, the nozzles spray to wash the internal biogas to remove carbon dioxide and hydrogen sulfide; at the same time, as the liquid level in the gas storage washing tower continues to rise, the biogas pressure will continue to rise. When the level rises to submerge the two floating balls of the liquid level control switch, the liquid level control switch controls the pump to stop, and the biogas increase is completed. At this time, the gas supply valve can be opened to use the biogas; The lye in the high-level tank flows into the gas storage washing tower again, and when the liquid level in the high-level tank drops to the level where two floating balls are exposed, the liquid level control switch controls the pump to start, and then pressurizes the biogas again. ;

Step 7: When deactivating the biogas, first cut off the power of the pump, then close the gas supply valve, and then open the gas collecting and draining valve, there is liquid flowing out from the gas collecting and draining pipe, release the pressure, and finally open the gas collecting valve, and the biogas enters the gas storage. In the scrubbing tower, liquid flows out from the gas collecting and draining pipes, and the gas storage scrubbing tower keeps accumulating biogas until the tower is full of biogas.

Repeating the above steps in this way can realize the whole process of biogas preparation, collection, cleaning and pressurized transportation.

Claims (8)

1. Simple and easy potato sediment preparation marsh gas's device which characterized in that: comprises a gas storage washing tower, an elevated tank, a washing liquid pool, a pump, a floating head and a potato residue bag;

the gas storage washing tower is arranged above the washing liquid pool, and the bottom of the gas storage washing tower is partially overlapped with the upper part of the washing liquid pool; an emptying valve and a gas collecting valve are arranged at the upper part of the gas storage washing tower, the gas collecting valve is connected with the potato dreg package through a gas collecting pipe and extends into the potato dreg package, potato dreg slurry doped with activated sludge is placed in the potato dreg package, and alkali liquor is injected into the washing liquid tank;

the elevated tank is arranged at the upper part of the gas storage washing tower, and the bottom of the elevated tank is communicated with the upper part of the side wall of the gas storage washing tower through a connecting pipe; a liquid discharge valve and a gas and liquid collection valve are arranged at the overlapping part of the bottom of the gas storage washing tower and the upper part of the washing liquid pool, the gas and liquid collection valve is connected with a floating head through a hose, and the floating head and the hose are positioned inside the gas storage washing tower;

a pump is arranged on the outer side of the bottom of the washing liquid pool, the inlet of the pump is connected with the inside of the washing liquid pool through a liquid conveying pipe, the outlet of the pump is connected with the liquid conveying pipe, and the upper part of the liquid conveying pipe extends into the elevated tank from the upper part of the elevated tank;

and an air supply valve is arranged at the upper part of the side wall of the washing tower.

2. The simple device for preparing biogas from potato residue as claimed in claim 1, which is characterized in that: the gas collecting pipe extends into the potato residue bag, and a plurality of through holes are distributed on the side wall of the gas collecting pipe.

3. The simple device for preparing biogas from potato residue as claimed in claim 1, which is characterized in that: and a liquid level control switch with two floating balls is installed above the elevated tank, and the liquid level control switch can control the start and stop of the pump.

4. The simple device for preparing biogas from potato residue as claimed in claim 1, which is characterized in that: the connecting pipe is a U-shaped pipe, and one end of the connecting pipe, which is connected with the bottom of the elevated tank, is higher than one end of the connecting pipe, which is connected with the upper part of the side wall of the gas storage washing tower.

5. The simple device for preparing biogas from potato residue as claimed in claim 1, which is characterized in that: the gas storage washing tower is characterized in that a plurality of spray heads are uniformly arranged above the inner part of the gas storage washing tower, and the connecting pipe is connected with one end of the upper part of the side wall of the gas storage washing tower and extends into the gas storage washing tower and is respectively connected with the plurality of spray heads.

6. The simple device for preparing biogas from potato residue as claimed in claim 1 or 5, which is characterized in that: the gas storage washing tower is characterized in that a partition plate is arranged in the gas storage washing tower, a plurality of through holes are uniformly distributed in the partition plate, the inside of the gas storage washing tower is divided into a left part and a right part by the partition plate, and the floating head and the hose are located on one side of the partition plate.

7. The simple device for preparing biogas from potato residue as claimed in claim 6, which is characterized in that: and a filler and a liquid level meter are arranged on the other side of the partition plate adjacent to the floating head and the hose in the gas storage washing tower, and a manhole is further arranged on the side wall of the gas storage washing tower.

8. The simple device for preparing biogas from potato residue as claimed in claim 1, which is characterized in that: the floating head is composed of a floating bottle, a hard pipe and a plurality of floaters, the floaters are installed on the outer wall of the floating bottle, the hard pipe is inserted into the floating bottle from the bottle opening of the floating bottle and is connected with the floating bottle, the bottle opening of the floating bottle faces downwards, and the hard pipe is connected with the hose.