CN201386095Y - FRP sealed stirring biogas digester - Google Patents

Abstract

The utility model provides a glass fiber reinforced plastic sealed stirring biogas digester, which comprises an upper half pond and a lower half pond. The upper half pond is also provided with a closed convex cavity with a feed port and a discharge port. The pool is connected; there is a mounting hole in the middle of the upper half of the pool, and a sleeve for installing the agitator is fixed in the mounting hole. The top of the sleeve is sealed with the inner wall of the mounting hole, and the lower part of the sleeve extends into the middle or the middle Below; the agitator is passed through the casing and inserted into the biogas digester. It has the characteristics of solid structure, strong pressure bearing capacity, rapid shell breaking without opening the biogas tank, and convenient operation, which ensures the continuous gas production of the biogas tank; its sealing performance is excellent, even when the stirring mechanism is rotating, the tank will not The body is still in a sealed state, maintaining the stability of the internal air pressure; it is greatly convenient for rural users and conducive to large-scale promotion.

Description

FRP sealed stirring biogas digester

technical field

The utility model relates to the improvement technology of a biogas pit, in particular to a fiberglass sealed stirring biogas pit with strong pressure bearing capacity, capable of stirring a floating shell and good sealing performance.

Background technique

At present, the commonly used fiberglass biogas digester has a spherical body and is composed of two upper and lower half ponds sealed. The top of the upper half pond is respectively equipped with a feed inlet and a discharge outlet. The biogas digester is installed underground, and the feed inlet is used for The pipeline is connected, and the outlet is also connected with the water pressure room made of cement through the pipeline. This FRP biogas digester has poor sealing effect and is prone to air leakage. Moreover, when the liquid surface in the pond is crusted, the cover on the upper part of the pond body must be opened to allow people to enter the pond for cleaning, which is both unhygienic and inconvenient.

For example, the "glass fiber reinforced plastic biogas digester" disclosed in Chinese patent CN2618920 is characterized in that a manhole is provided on the top of the upper half of the pond, and a feed port and a discharge port are respectively provided on both sides, and a water pressure room is fixedly installed at the discharge port. A hand mixer is installed in the tank. Personnel can enter the biogas digester for maintenance and cleaning, and break the floating shell in the pond by turning the manual mixer. However, the surface of the spherical structure of this biogas digester has a weak pressure bearing capacity. When the pressure on the surface increases due to the load, the top The casing is prone to dents; and the manhole is sealed by the manhole cover. Since the manhole cover is a movable connection, it needs to be opened from time to time to facilitate the slag discharge. Therefore, it is difficult to achieve a complete sealing effect when closing, which may cause methane. Leakage; when the agitator rotates, because the distance between the support point and the handle of the agitator is relatively close, and the lower end of the support rod is long and not fixed, it is found in practice that after a period of use, the lower end of the agitator is prone to shaking, which will affect the manhole cover Excellent sealing performance, and during installation, the feed inlet and discharge outlet need to be connected to the side of the biogas digester respectively, there will inevitably be gaps during installation, and the welding precision is required to be high.

Utility model content

In view of the above-mentioned deficiencies in the prior art, the purpose of this utility model is to provide a FRP sealed and stirred biogas with strong structure, strong pressure bearing capacity, manual/automatic stirring and shell breaking, excellent sealing performance, convenient installation and strong practicability pool.

The technical solution of the utility model is: a sealed and stirred biogas digester made of glass fiber reinforced plastics, comprising an upper half pool and a lower half pool, the upper half pool is provided with an air outlet pipe, and the feature is that the upper half pool is also provided with a feeding port and a A closed convex cavity at the discharge port, which communicates with the upper half of the tank; there is also a mounting hole in the middle of the upper half of the tank, and a sleeve for installing the agitator is fixed in the mounting hole, and the top of the sleeve is connected to the inner wall of the mounting hole. Sealed connection, the lower part of the casing extends into the middle or below the middle of the biogas digester; the agitator passes through the casing and is inserted into the biogas digester.

Further, the feed inlet and the discharge outlet are arranged on the side wall of the convex cavity and communicate with the methane digester.

The top of the mounting hole is provided with a baffle, and the baffle is fixedly connected with the mounting hole, and a bearing is installed in the baffle, and the stirring rod of the agitator is movably connected with the bearing and passes through the baffle; the bottom of the stirring rod of the agitator Connected to a bearing fixed to the bottom of the lower half of the pool.

The sleeve is a tapered structure with a thick top and a thin bottom, and the top end of the sleeve is clamped on the inner wall of the installation hole.

The agitating support of the agitator is asymmetrical in two rows.

Compared with the prior art, the utility model has the following advantages:

1. Since there is a convex cavity with a material inlet and a material outlet on the upper half of the pool, the stress state of the pool body is effectively improved, and the working surfaces of the components share the force, and the overall load bearing is greatly strengthened, compared with the traditional one. The load-bearing capacity of the FRP biogas digester has doubled; it has effectively enhanced the pressure-bearing capacity of the biogas digester, and has the characteristics of simple structure and firmness.

2. A stirring mechanism is set in the inner cavity of the biogas digester, and the stirring support of the stirrer is asymmetrical in two rows, which can realize full stirring up and down and in a large area, and can quickly break the shell without opening the biogas digester, and can easily Breaking the floating shell has the characteristics of convenient operation, and can choose manual or automatic operation, which ensures the continuous gas production of the biogas digester.

3. The casing for installing the agitator is a conical structure with a thick top and a thin bottom, and the top of the casing is clipped on the inner wall of the installation hole, which is not only convenient to fix the casing, but also more convenient to install the sealing mechanism, even if the stirring mechanism is rotating , the cell body is still in a sealed state, maintaining a stable internal air pressure.

4. In the utility model, the feed port and the discharge port are set on the side wall of the convex cavity, and are connected with the biogas digester, which further enhances the safety of the biogas digester; the improved pond body is quick to install, and the transportation is more convenient and convenient The use of rural users is conducive to large-scale promotion.

Description of drawings

Fig. 1 is the front view of the FRP sealed stirring biogas digester of the present utility model;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a sectional view along line A-A of Fig. 1 .

In the figure, 1-upper half tank, 2-lower half tank, 3-inlet, 4-outlet, 5-outlet pipe, 6-convex edge, 7-inner cavity, 8-stirrer, 9-stop Plate, 10-bearing, 11-sleeve, 12-stirring support, 13-bearing, 14-installation hole, 15-liquid level, 16-stirring support.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

The fiberglass sealed stirring biogas pit of the utility model is an improvement on the basis of the existing spherical structure biogas pit. As shown in Figure 1 and Figure 2, a FRP sealed stirring biogas digester includes an upper half pool 1 and a lower half pool 2, the upper half pool 1 and the lower half pool 2 are respectively provided with snap-fit convex edges 6, and the convex edges 6 The upper and lower half pools are sealed and combined as a whole, the upper half pool 1 is provided with an air outlet pipe 5; the upper half pool 1 is also provided with a closed convex cavity 2 with a material inlet 3 and a material outlet 4, The feed port 3 and the discharge port 4 are all located on the side wall of the convex cavity 2, and the convex cavity 2 communicates with the upper half pool 1; There is a casing 11 for installing the agitator 8, the top of the casing 11 is sealed and connected with the inner wall of the installation hole 14, and the lower part of the casing 11 extends into the middle or below the middle of the biogas digester; the agitator 8 passes through the casing 11 and is inserted into the biogas digester . The utility model is respectively provided with a feed port 3 and a discharge port 4 on the side wall of the convex cavity 2, and communicated with the biogas digester. Compared with the traditional biogas digester, the feed port and the discharge port are arranged on the top, and the feed through the side is further The safety of the biogas digester is enhanced, which is also a targeted improvement based on the problems encountered by rural users in the actual use process.

The agitator 8 of the present utility model comprises a stirring rod and a stirring support. By using the agitator, the shell breaking of the liquid level can be achieved even without opening the biogas digester, which is convenient and safe. In order to achieve automatic shell breaking, a motor can also be connected to the handle of the stirrer, and the motor can be used to drive the stirrer to run, realizing the function of automatic stirring, which can greatly reduce the workload of personnel. The lower end of the central shaft of the agitator 8 is movably connected with the bearing 13, and the bearing 13 is fixed on the bottom of the lower half pool 2, and the agitator 8 can rotate together with the bearing 13. Another bearing 13 is installed at the bottom of the lower half pool 2, and the bearing 13 is located directly below the bearing 10, and the central axis of the agitator is jointly stabilized by the two bearings, so that the agitator rotates around the center line during operation.

The agitating supports 12 of the agitator 8 are asymmetrical in two rows. The left and right ends of the lower part of the central shaft of the stirrer rod are provided with hook-shaped stirring supports 12 respectively, and the radii of the stirring supports 12 at both ends are different from the central shaft. By arranging stirring supports with different radii, the range affected by the rotation of the stirrer is expanded, and the floating shells at both the proximal end and the distal end can be broken. Simultaneously, because part of the slag material has the phenomenon of sinking to the bottom, a stirring support 16 is also connected to the bottom of the central axis of the agitator 8, and the stirring support 16 is all placed in the slag material and is positioned under the stirring support 12. The opening direction of the stirring support 16 is in line with the In contrast to the stirring support 12, when the stirrer is turned, the stirring support 16 can roll up the slag at the bottom of the pool and effectively mix it with the newly added slag, so that the slag can fully react and greatly increase the gas production. Through experiments It is found that the gas production is at least 20% higher than that of ordinary biogas digesters. According to needs, a larger stirring block can also be installed on the stirring support to increase the control area during stirring.

The top of described mounting hole 14 is provided with baffle plate 9, and baffle plate 9 is fixedly connected with mounting hole 14, and bearing 10 is installed in baffle plate 9, and the stirring bar of stirrer 8 is movably connected with bearing 10 and passes through baffle plate 9 ; The bottom of the stirring bar of the agitator 8 is connected with the bearing 13 fixed on the bottom of the lower half pool 2 .

As a further improvement of the utility model, the installation hole 14 and the sleeve 11 are both in the shape of an inverted cone with the same taper, and the top end of the sleeve 11 is clamped on the inner wall of the installation hole 14 . Through the inverted cone-shaped setting, it is more convenient to connect with the installation hole when installing the sleeve, which is convenient to fix and has a better sealing effect.

In addition, the convex cavity 2 on the upper half of the pool 1 can be designed as a circular platform, an elliptical platform, a rectangular shape or other shapes that are similar to the shape of a stadium runway. The utility model greatly strengthens the structural stability of the biogas digester by adding a convex cavity structure on the upper part of the upper half pool 1, and increases the volume of the internal cavity, which can bear greater weight and is less likely to be sunken. The outer wall of the top end of the casing 11 and the inner wall of the installation hole 14 have the same diameter at the junction, and the junction is sealed with glass glue or concrete. Effect. The inner surface of the convex cavity 2 and the outer surface of the covered part of the upper half of the sphere are cavities connected together and isolated from the inner cavity 7 .

Claims (5)

1, a kind of FRP sealed stirring biogas digester, comprises upper half pond (1) and lower half pond (2), is provided with outlet pipe (5) on the upper half pond (1), is characterized in that, described upper half pond ( 1) is also provided with a closed convex cavity (2) with a feed port (3) and a discharge port (4), the convex cavity (2) communicates with the upper half pool (1); ) is also provided with a mounting hole (14) in the middle, and a casing (11) for installing the agitator (8) is fixed in the mounting hole (14), and the top of the casing (11) is sealed and connected with the inner wall of the mounting hole (14). The lower part of the casing (11) extends into the middle or below the middle of the biogas digester; the agitator (8) passes through the casing (11) and is inserted into the biogas digester. 2. The FRP sealed stirring biogas digester according to claim 1, characterized in that, the feed inlet (3) and the discharge outlet (4) are arranged on the side wall of the convex cavity (2), and are connected with the biogas digester connected. 3. The FRP sealed stirring biogas digester according to claim 1, characterized in that a baffle (9) is arranged on the top of the installation hole (14), and the baffle (9) is fixedly connected with the installation hole (14), Bearing (10) is installed in baffle plate (9), and the stirring bar of agitator (8) is movably connected with bearing (10) and passes baffle plate (9); The stirring bar bottom of described agitator (8) and The bearing (13) that is fixed on the lower half pool (2) bottom links to each other. 4. The FRP sealed stirring biogas digester according to claim 1, characterized in that, the casing (11) has a conical structure with a thick top and a thin bottom, and the top end of the casing (11) is snapped into the installation hole (14 ) on the inner wall. 5. The FRP sealed stirring biogas digester according to claim 1, characterized in that, the stirring supports (12) of the stirrer (8) are asymmetrical in two rows.

Images