CN201176437Y - Water-sealed self-regulating plastic bag combined biogas digester - Google Patents

Abstract

The utility model relates to a water-sealed self-regulating plastic bag combined biogas pond, which is composed of a plastic biogas bag suspended on an underground pond body. The plastic biogas hanging bag is a cuboid plastic hanging bag or a cylindrical plastic hanging bag with an opening at the bottom. There is a gas outlet on the top of the hanging bag. A through sleeve, and the through sleeve is evenly distributed with hook holes for hanging on the hooks on the wall of the biogas tank. The pool body is a brick-concrete structure with the same shape as the biogas hanging bag. A hook is pre-buried on the pool wall below the biogas liquid level, and the pool body is provided with an oblique feeding port. Since some plastic biogas hanging bags on the pool can rise, float and expand in the biogas slurry, the space in the pool can be changed and the pressure in the pool can be automatically adjusted. It has the characteristics of novel and reasonable structure, low construction cost, convenient use, convenient and safe excavation of waste biogas residues.

Description

Water-sealed self-regulating plastic bag combined biogas digester

technical field

The utility model relates to a biogas fermentation tank, in particular to the technical field of biogas fermentation and gas production equipment which is convenient for removing biogas residues and dirt and has the function of water sealing and self-regulating pressure.

Background technique

In recent years, under the care and support of the Party Central Committee and the government, the country's rural areas have begun to develop, promote and apply biogas in large quantities to solve the problem of farmers' fuel difficulties for generations. At the same time, the ecological environment is also protected by reducing deforestation. Although it is urgent to develop the biogas industry, traditional brick-concrete ponds with a history of several decades have been used in the past, and a glass-steel biogas digester was introduced later. Although the latter is slightly better than the former, there are still problems such as the use of more building materials, slow construction of ponds, high technical requirements for installation, low gas production rate, problems during use, difficulty in discharging biogas residues, and even fatal accidents. , construction operation management and high maintenance costs. These defects seriously restrict the development of biogas industry.

Utility model content

The purpose of the utility model is to provide a water-sealed self-regulating plastic biogas hanging bag with simple structure and easy installation.

The purpose of this new model is achieved as follows: a water-sealed self-regulating plastic biogas hanging bag, the plastic biogas hanging bag is a cuboid plastic hanging bag or a cylindrical plastic hanging bag with an opening at the bottom, and a gas outlet is arranged on the top of the hanging bag. The mouth, the lower edge of the hanging bag is provided with a through sleeve used for wearing plastic rods or bamboo poles, and the through sleeves above the plastic rods or bamboo poles are evenly distributed with hooks for the underground biogas tank wall Hanging hook holes.

Another purpose of the utility model is to provide a water-sealed self-regulating biogas digester with low construction cost, easy management and maintenance, convenient and safe cleaning of waste biogas slag, and adopting the above-mentioned plastic biogas hanging bag.

Another purpose of this new model is achieved in the following way: a biogas digester using water-sealed self-regulating plastic biogas hanging bag, the pond body is a brick-concrete structure with the same shape as the biogas hanging bag, and the biogas slurry on the wall of the pond body A hook for hanging biogas bags is embedded in the position below the surface, and an oblique feeding port is provided on the pool body.

This new type of black mud water-sealed self-regulating plastic biogas hanging bag is made of a high-quality polyvinyl chloride resin with an appropriate amount of carbon black, red mud, combined plasticizer, composite stabilizer, fire retardant, anti-aging agent, anti-rat and anti-mildew It is a kind of special gum (PVC) resin film made of materials such as additives, reinforcing agents and reinforcing fibers, and then the film is made into a new type of plastic biogas digester hanging bag by high-frequency electric heating technology, and its shape is rectangular. Cylindrical hanging bag type, because the bag has no bottom, it can also be used as a half-cut bag-shaped pool or a bottomless bag-shaped pool. The lower end of the bag is connected with the hooks on the wall of the corresponding brick-concrete pool to form an exquisite and reasonable combined methane fermentation gas production pool.

The raw material of this new type of plastic biogas hanging bag is carbon black and red mud as filling additives. The pool body is black and bright, also known as black pearl. It has good sealing performance, tensile resistance, tear resistance, aging resistance, acid and alkali resistance, and strong heat absorption. The aging time of the pool body is shortened, and its lifespan is 1-2 times that of ordinary similar plastic biogas pools.

The utility model water-sealed self-regulating plastic bag-mounted combined biogas digester also has the following advantages:

(1) Because the carbon black and red mud mixed in are black, they have light absorption and heat preservation, which can improve the gas production rate of anaerobic fermentation.

(2) Use the height difference of water or biogas slurry to seal the hook connection between the bag and the pit, so that the biogas in the pool is stored between the liquid level in the pool and the hanging bag; The pressure change of the biogas on the liquid level and the change of the liquid level of the biogas in the pressurized pond matched with the main pond can expand the volume of the biogas stored in the pond. When the biogas pressure is too high, the liquid level of the main pond is pressed into the pressurized pond and the liquid level of the main pond When it is lower than the connection between the hanging bag and the wall hook, too much biogas will overflow from the connection seam of the hook, the pressure in the main pool will drop, and the liquid in the pressurized pool will flow back, so that the automatic adjustment of the biogas pressure in the biogas tank can be achieved. , Play the role of preventing the pool from bursting and ensuring the safe use of the combined pool. In addition to the elastic shrinkage of the PVC plastic in the pool body, they can change with the temperature change, the gas production rate in the pool changes, the pressure change caused by the change causes the water level to rise and fall, and then the space changes. One is to increase the gas storage capacity, and the other is to make too much gas It overflows from the hook and the joint between the pool body and the pool pit wall, so that the air in the pool can regulate and stabilize the pressure.

(3) The gas production rate is stable in four seasons: when the temperature is low in winter, a thermal insulation cover can be added to the pool body to increase the temperature in the pool and increase the gas production rate. It can be used in summer to block sunlight, prevent damage to the pool body from external and human factors, and also prolong the service life of the plastic hanging bag.

(4) The structure is novel and reasonable, and the investment and construction cost is low, which is 1/2-1/3 of the investment of general brick-concrete or glass fiber reinforced plastic pools.

(5) It is easy to install and disassemble, can be used repeatedly, and the maintenance amount is small and convenient.

(6) Slag removal from biogas digesters is the biggest problem for all traditional ponds and general plastic ponds. This new model is a new type of biogas digester that is convenient for removing biogas residues and mud deposits. Utilizing the characteristics of the hanging connection between the plastic hanging bag and the hook between the underground brick-concrete pool body, if necessary, the excess biogas slurry can be released first, and the hanging bag above the pool body can be removed to expose the entire brick-concrete pool pit. At this time, any An effective tool for clearing out sediment and sludge in pits. This method completely solves the biggest technical problem of slag removal in traditional biogas digesters, making it simple, safe and easy to operate. This is a major innovation point of this new model. When clearing the waste residue in the pool, the plastic pool body can be removed, so that the pool pit is completely turned into an open-air septic tank, so the residue can be removed conveniently, and there will never be accidents such as accidental personal poisoning caused by digging, which fundamentally solves the problem. The slag removal problem that cannot be solved by various traditional sealed biogas digesters is a major breakthrough in the slag removal methods and technologies of biogas digesters.

(7) Due to the scientific and reasonable design of the raw material formula and material selection, structure and processing technology of the plastic hanging bag, the quality of the welding seam of the hanging bag is high, the pool body is firm, and the service life can reach more than 10-15 years.

(8) The equipment is beautiful and generous, the color can be selected, the surrounding is clean, and the treated sewage can meet the standard discharge.

(9) The production of the product is relatively easy, and it can be more convenient to realize industrialized production and supply the market in batches, and can also be specially designed and manufactured according to the needs of projects or special users.

(10) There is a feed pretreatment tank on the side of the earth tank, which can sink the sand, gravel and sundries in the biogas material to the bottom of the tank, and the clean material enters the fermentation tank.

(11) There is a pressurized water pool next to the brick-concrete pit, and the biogas feed liquid in the fermentation tank can be adjusted conveniently, and they play the role of regulating pressure, preventing explosion and ensuring safety. When digging out pond slag and releasing biogas slurry, enough old biogas slurry and old biogas material with rich seedlings can be stored. When the fermentation tank is refilled with new biogas material, the old material solution is put into the tank to speed up the fermentation speed.

The utility model has a novel and reasonable design structure, low construction cost, stable quality, easy installation, high gas production rate, convenient use, easy management and maintenance, convenient and safe excavation of waste biogas residue, anti-aging, economical and durable, and can be used repeatedly. The utility model is easy for industrialized production, and is especially suitable for rural users and large and medium-sized biogas projects.

Description of drawings

Fig. 1 is the structural representation of the novel biogas digester;

Fig. 2 is the perspective view of a kind of embodiment (cuboid hanging bag) of plastic biogas hanging bag shown in Fig. 1;

Fig. 3 is the structural diagram of brick-concrete pool body;

Fig. 4 is a front view of the hook shown in Fig. 1 .

Detailed ways

In the figure: 1. Plastic biogas hanging bag; 2. (Through stick) through sleeve; 3. Hook hole; 4. Air outlet; 5. Biogas feed liquid; 6. Pressed water tank/old liquid storage tank; ) hook; 8, discharge port (communicating hole); 9, space in the tank body; 10, oblique feed port; 11, biogas material sedimentation and separation pretreatment tank; 12, (brick-concrete) tank body.

Figure 1 and Figure 2 show that the new model is mainly composed of plastic biogas hanging bags and brick-concrete pool bodies. The plastic biogas hanging bag 1 is a cuboid plastic hanging bag or a cylindrical plastic hanging bag with an opening at the bottom. The top of the hanging bag is provided with a gas outlet 4, and the lower edge of the hanging bag is provided with a plastic rod or bamboo for wearing. The through sleeve 2 of the rod, and the through sleeve 2 above the plastic rod or bamboo pole are evenly distributed with hook holes 3 for hanging on the hooks on the wall of the underground biogas digester. Plastic biogas hanging bags are called black pearls because they are black (black and bright) after adding fillers. It is made of high-quality polyvinyl chloride resin, adding appropriate amount of carbon black, red mud, combined plasticizer, composite stabilizer, anti-light and heat aging agent, anti-rat, anti-mold agent, reinforcing agent and reinforced fiber material. Made of a special resin diaphragm. Make a 7 centimeter through sleeve along the four perimeters of the lower hanging bag, and a certain number of round holes of Φ12 mm can be opened at the upper end of the through sleeve mouth.

When in use, place the plastic hanging bag body in a brick-concrete pool with corresponding specifications, pre-embed a certain number of steel-shaped hooks on the walls of a certain height around the earth pool pit, and then place them in the sleeves on each side of the plastic pool. Insert a long steel bar (or hard plastic rod or mottled bamboo) and connect its set of sticks to the shaped hooks on the wall of the pit. Appropriate biogas material is loaded into the feed port, and the material liquid level should be about 30-40 cm higher than the hook periphery of the pool body. After the pool is filled with biogas material, the height of the liquid level exceeds the joint, and there is a gap between the bag and the pool. Water sealing phenomenon. Because the upper part of the plastic pool body can rise, float and expand in the biogas slurry, thereby changing the space of the pool body and automatically adjusting the pressure inside the pool, it is also called a water-sealed self-regulating safety new plastic biogas digester.

Referring to Fig. 3, the shape of the hook is a curved hook shape, which can bear force and prevent the cross bar in the plastic soft body through the sleeve from falling from the hanging wall hook, so that the combined pool body is firm and reliable. The hook is made of structural steel bars, and the rear end is pre-embedded. The structure of the air outlet nozzle 4 is: the air outlet pipe is provided with threads, the bottom of the air outlet pipe is fixedly connected with a base plate, and the nut with splint is screwed on the air outlet pipe. The air outlet is firmly and closely matched with the plastic pool body in the form of a flange. The plastic biogas hanging bag is a black plastic biogas hanging bag with a thickness of 0.8-1.8mm. Its specific specification is 0.8mm or 1mm or 1.2 or mm or 1.6mm or 1.8mm, so as to meet the technical parameter requirements for making various volume cells.

The shape of the pool body 12 is the same as that of the biogas hanging bag 1. The pool body is of brick-concrete structure. A hook 7 for hanging the biogas hanging bag is pre-buried on the pool wall below the biogas liquid level. Mouth 10. The pool body 12 communicates with the pressurized water pool 6 through a communication hole. A pretreatment pond 11 for settling and separating biogas material impurities is also provided outside the tank body 12 corresponding to the position of the inclined feed port 10 . It also has a thermal insulation cover for covering the pool body and the plastic biogas hanging bag. The thermal insulation cover can be made of straw, linoleum, wheat straw or foam plastic to match the brick-concrete pool body. It is also possible to build a simple tent (room) on the digester. Although the money is not much, it can play a role of heat preservation when the temperature is low in winter, so that the biogas digester can produce gas efficiently and evenly in all seasons. In summer, it can shade the sun, reduce the damage of ultraviolet rays to plastics, and play a role in delaying aging. Because of its shade, it can also prevent man-made or other natural damage to the pool body.

Engineering implementation and application

The practical application of installing this pond is to combine the two parts of the biogas hanging bag (that is, the hanging bag) and the underground brick-concrete pit. The construction steps are as follows:

Water-sealed self-regulating pressure-hanging bag combined biogas digester (hereinafter referred to as combined tank) (Figure 1). The following steps are taken during construction:

The first step: Prepare the black mud plastic hanging bag according to the customer's requirements, such as 8 cubic meters.

The second step: build a brick-concrete pool pit: first dig a deep pit of a specified size underground at the selected site according to the shape corresponding to the hanging bag, and use bricks and cement to build a brick pit in it. Put cement on it, and embed a certain number of hooks on the walls around it. At the same time, prepare the feed pretreatment pool and press water pool. The feed hole and discharge port (communicating hole) are ready for use after the cement absorbs sweat and solidifies. .

Step 3: Put the hard rod through the four-sided sleeve of the hanging bag, and put the hanging bag into the hooks on the walls around the pool pit. Then install biogas transmission pipelines, switches, steam-water separators, gas storage bags, four-in-one purification regulators, booster pumps, stoves, lamps, water heaters, heaters, etc. So far, the gas supply transmission pipeline and gas equipment system of the combined pool have been completely installed.

Step 4: Feeding, feed the biogas material into the pretreatment tank from the feed port, and the clean material after sedimentation and separation of biogas residue and debris enters the lower part of the tank body from the feed hole, when the biogas material fills the tank When the liquid level of 2/3 of the space is higher than the connection of the hook of the bag pool, it is considered to be full.

Step 5: Add a certain amount of old biogas residue liquid and old sewage rich in anaerobic bacteria. After a few hours to a day or two in the temperature environment of 10-50 ℃, the biogas will start to be produced normally in the pond, and the user can use the gas normally. At this point, the entire household biogas engineering pond is completed.

When in use, a certain amount of biogas is poured into the space formed by the hanging bag and the pit, and anaerobic bacteria are put in. After a period of anaerobic fermentation at a certain temperature, biogas can be continuously produced, and then transported through the pipeline. To the user, it can be used for people to boil water, cook, heat, and illuminate. The biogas digester is regularly added with an appropriate amount of biogas, and the gas production can be maintained continuously. In the biogas digester, the biogas residues and sludge should be cleared and biogas slurry should be added to the biogas digester for recycling due to the large amount of dirt deposited in the biogas digester after several consecutive feeds or after a year or so.

The raw material formula of the biogas pool body is scientific, the material is high-quality, the design structure is novel, the construction period is short, the installation and maintenance are convenient, economical and practical, and the construction cost of the biogas pool can be effectively reduced. It is most suitable for industrialization, large-scale production and popularization and application. It is a new generation of soft biogas equipment after traditional brick-concrete structure biogas digesters, glass fiber reinforced plastic biogas digesters and general plastic biogas digesters. It can also be called the third generation of plastic soft biogas digesters.

Claims (7)

1. A water-sealed self-regulating plastic biogas hanging bag, characterized in that: the plastic biogas hanging bag (1) is a cuboid plastic hanging bag or a cylindrical plastic hanging bag with an opening at the bottom, and the top of the hanging bag is provided with The air outlet (4), the lower edge of the hanging bag is provided with a through sleeve (2) used as a plastic rod or bamboo pole for wearing, and is evenly distributed on the through sleeve (2) above the plastic rod or bamboo pole. There are hook holes (3) for hanging on hooks on the wall of the underground biogas digester. 2. According to claim 1, the water-sealed self-regulating plastic biogas hanging bag is characterized in that: the structure of the gas outlet nozzle (4) is: the gas outlet pipe is provided with threads, and the bottom of the gas outlet pipe is fixedly connected with a bottom plate with a splint The nut screwed on the outlet pipe. 3. According to claim 1 or 2, the water-sealed self-regulating plastic biogas hanging bag is characterized in that: the plastic biogas hanging bag is a black plastic biogas hanging bag, and its thickness is 0.8-1.8mm. 4. A biogas digester using a water-sealed self-regulating plastic biogas hanging bag as claimed in claim 1, characterized in that: the body (12) of the biogas digester is a brick with the same shape as the biogas hanging bag (1) With a mixed structure, a hook (7) for hanging a biogas hanging bag is pre-buried on the wall of the pool body below the biogas liquid level, and an oblique feeding port (10) is provided on the pool body. 5. The biogas digester with water-sealed and self-regulating plastic biogas bags according to claim 4, characterized in that it also has a pressurized water pond (6) communicating with the pond body (12) through a communication hole (8). 6. According to claim 5, the biogas digester with water-sealed and self-regulating plastic biogas hanging bag is characterized in that: the outside of the pond body (12) is also provided with an oblique feed port (10). A biogas debris sedimentation treatment pond (11) connected to the feed port (10). 7. The biogas digester with water-sealed and self-regulating plastic biogas hanging bag according to claim 4, 5 or 6, characterized in that it also has a thermal insulation cover for covering the pond body and the plastic biogas hanging bag.

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