CN103333793A - Waterwheel type anti-crusting biogas digester - Google Patents

Abstract

The invention relates to a waterwheel type anti-encrustation biogas digester. The purpose is to provide a biogas digester that is not easy to crust on the surface of the biogas slurry, and is easy to use and safe to use. The technical solution is: a waterwheel type anti-crust biogas digester, including a cylindrical fermentation tank buried under the ground. The top of the fermentation tank is provided with an outlet and sealed with a top cover. The biogas pipe for leading out biogas; the opposite sides of the fermentation tank are respectively provided with a feed port and a discharge port, and the feed port and the discharge port are respectively connected to the feed tank and the discharge tank through pipelines; it is characterized in that the fermentation tank A water wheel type anti-crust device is also provided, which includes a collection tank corresponding to the position of the feed inlet to collect the input liquid raw material and a water wheel located below the collection pool; the water wheel can rotate around the vertical axis and A plurality of vanes are evenly installed in the circumferential direction, and a water spray port corresponding to the position of the vanes is made at the bottom of the collection pool to drive the water wheel to rotate by the sprayed liquid.

Description

A waterwheel type anti-crust biogas digester

technical field

The invention relates to a biogas digester, especially a biogas digester capable of preventing encrustation.

Background technique

Rural biogas energy, as the main body of a stable, economical, clean and safe energy security system, has played an important role in sustainable economic and social development. In recent years, in the construction of new socialist countryside, the important position of rural biogas construction has received the attention and support of the whole society. However, the structure of the existing hydraulic biogas digester is not perfect enough, and there are some problems to be solved, one of the main problems is the encrustation of the biogas digester. During the use of the biogas digester, farmers add too much manure, add too little water, and do not pay attention to frequent discharge and stirring, resulting in less water in the fermentation room, high fermentation concentration, and a large amount of organic acid accumulated, which makes the upper layer of the fermentation raw material crusted , and the problem affecting the normal use of biogas by farmers is particularly prominent. The formation of crusts in the biogas digester will reduce the utilization rate of raw materials, reduce the gas production, and reduce the effective volume of the biogas digester and the volume of the gas storage chamber. When the incrustation in the biogas digester is severe, the biogas digester becomes a waste pond. Therefore, solving the crusting problem of biogas digesters is one of the important factors for the promotion of biogas in agriculture.

Contents of the invention

The technical problem to be solved by the present invention is to provide an improvement of a biogas digester. The biogas digester should have the characteristics that the surface of the biogas liquid is not easy to encrust, and it is convenient and safe to use.

The technical solution provided by the present invention is: a waterwheel type anti-crust biogas digester, including a cylindrical fermentation tank buried under the ground, the top of the fermentation tank is provided with an outlet and sealed with a top cover, and an access tank is installed on the top of the tank There are biogas pipes used to lead out the biogas in the chamber; the opposite sides of the fermentation tank are respectively provided with a feed port and a discharge port, and the feed port and the discharge port are respectively connected to the feed tank and the discharge tank through pipelines; it is characterized in that A waterwheel type anti-encrustation device is also arranged in the fermentation tank, which includes a collection tank corresponding to the position of the feed inlet to collect the input liquid raw materials and a water wheel located below the collection tank; the water wheel can be rotated vertically The straight axis rotates and a plurality of blades are evenly installed on its circumference. A water spray port corresponding to the position of the blade is made at the bottom of the collection pool to drive the water wheel to rotate by the sprayed liquid.

The upper edge of the collection tank is covered by a screen to remove larger particles in the liquid raw material.

The water spout is located on one side of the bottom of the collecting tank.

The working principle of the present invention is:

The liquid raw material enters from the feed tank 1 on the ground through the feed port 1-1, and after being filtered by the screen 2, the large particles fall into the fermentation tank from the surrounding edges of the screen under the action of gravity and the impact of part of the liquid for normal fermentation. Fermentation, the liquid material filtered through the screen enters the collection tank 5 below the screen; the liquid material accumulated in the collection tank is flushed out through the water nozzle 4 at the bottom of the collection tank, and impacts the inclined blades 7 on the waterwheel to make the water The car rotates, thereby disturbing the liquid raw materials in the fermentation tank. Such continuous feeding, continuous impact on the water wheel, and the continuous rotation of the water wheel will continuously stir the liquid in the fermentation tank, thus effectively preventing the liquid surface in the fermentation tank from crusting.

The beneficial effect of the present invention is: due to the arrangement of the waterwheel type anti-encrustation device, the incrustation in the fermentation tank can be effectively prevented, the fermentation efficiency is improved, and higher gas production in the fermentation tank is realized. Moreover, the device is convenient and safe to use during operation, and does not need to spend too much energy on maintenance, thereby reducing the maintenance workload of users. In addition, the device has the advantages of simple structure, low cost and simple construction, and can also be added to an already built biogas digester. Therefore, it has high practical value and promotion value.

Description of drawings

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

Fig. 2 is a top view structural schematic diagram of the present invention.

Fig. 3 is an enlarged structural schematic diagram of the waterwheel in Fig. 2 .

Fig. 4 is an enlarged structural schematic diagram of the waterwheel in Fig. 1 .

Fig. 5 is a three-dimensional enlarged schematic view of the collection tank in the present invention.

In Fig. 1, 1 is the feeding pool, 1-1 is the feeding port, 2 is the screen, 3 is the biogas digester, 4 is the water spout, 5 is the collection tank, 6 is the waterwheel, 6-1 is the pillar, 7 is a blade, 8 is a discharge tank, 8-1 is a discharge port, 9 is a biogas pipe, 10 is an outlet, 11 is a feed pipe, and 12 is a discharge pipe.

Detailed ways

The waterwheel type anti-crust biogas digester shown in the accompanying drawings includes a cylindrical fermentation tank 3 buried under the ground E. The top of the fermentation tank is provided with an outlet 10 and is sealed with a top cover. Inside is a biogas pipe 9 for extracting biogas; the opposite sides of the fermentation tank are provided with a feed port 1-1 and a discharge port 8-1, the feed port is connected to the feed tank through the feed pipe 11, and the discharge port is The discharge tank is communicated with through the discharge pipe 12 . A waterwheel type anti-encrustation device is also provided in the fermentation tank, which includes a collection tank 5 and a waterwheel 6 located below the collection tank. The collection pool is located below the feed port and corresponds to the position of the feed port, and the liquid flowing out of the feed port can directly enter the collection pool for collection. The waterwheel is supported by a vertically arranged pillar 6-1, which can rotate around the vertical axis (it is recommended to be rotatably mounted on the pillar through bearings); the waterwheel is evenly equipped with a plurality of blades 7 in the circumferential direction, and a bottom of the collection pool is made. The water spray port 4 corresponding to the position of the blade is used to drive the water wheel to rotate by the sprayed liquid. Because the waterwheel is located below the liquid level in the fermentation tank, it can stir the liquid level in the fermentation tank after turning, which can effectively prevent the generation of crusting on the liquid level.

It can be seen from Figure 5 that the water spray port is located on one side of the bottom of the collection tank, and the circumferential blades of the waterwheel are made into corresponding inclined planes (forming a certain angle with the horizontal plane), so that the liquid power ejected from the water spray port get the most out of it.

Further, the upper edge of the collection pool is covered by a screen 2; when the liquid raw material (usually animal feces) input from the feed port 1-1 passes through the screen, larger particles are trapped and then slide off from both sides of the screen into the fermentation tank, and the rest of the liquid passes through the screen and enters the collection tank to accumulate, which is used as the power source for driving the waterwheel.

The anti-crust device is generally made of cement material.

Claims (3)

1. A waterwheel type anti-crust biogas digester, including a cylindrical fermentation tank (3) buried under the ground, an outlet (10) is provided on the top of the fermentation tank and sealed with a top cover, and an inlet tank is installed on the top of the tank The biogas pipe (9) used to lead out the biogas in the cavity; the opposite sides of the fermentation tank are respectively provided with a feed port (1-1) and a discharge port (8-1), and the feed port and the discharge port pass through the The pipeline connects the feed tank (1) and the discharge tank (8); it is characterized in that a waterwheel type anti-encrustation device is also installed in the fermentation tank, and the device includes a water wheel corresponding to the position of the feed inlet to collect the input liquid raw materials. The collection tank (5) and the water wheel (6) located below the collection tank; the water wheel can rotate around the vertical axis and a plurality of blades (7) are evenly installed on its circumference, and the bottom of the collection tank is made to match the position of the blades. The corresponding water spout (4) can drive the water wheel to rotate by utilizing the ejected liquid. 2. A waterwheel type anti-encrustation biogas digester according to claim 1, characterized in that the upper edge of the collection pool is covered by a screen (2) to remove larger particles in the liquid raw material. 3. A waterwheel type anti-encrustation biogas digester according to claim 2, characterized in that the water spray port is located on one side of the bottom of the collection pond.

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