CN203999604U - With joint efforts upper plug-flow anaerobic reactor - Google Patents

Abstract

The utility model discloses a kind of upper plug-flow anaerobic reactor of making a concerted effort, described interior fermentor tank tank body is arranged in outer fermentation tank, and described interior fermentor tank tank body and outer fermentation tank coaxially arrange, described opening for feed is arranged on the bottom of outer fermentation tank outer wall, described opening for feed is connected with feed-pipe, described discharge port is arranged on the middle part of interior fermentor tank tank body diapire, described discharge port is connected with discharge nozzle, described fermentor tank cover is arranged on the top of outer fermentation tank, described venting port is arranged on the top of fermentor tank cover, described venting port is connected with biogas vapor pipe.The beneficial effects of the utility model are: utilize the force actions such as thrust in charging, buoyancy, biogas rising to promote feed liquid floating, the effect of recycling gravity and biogas pressure promotes discharging, has solved the problem of the contour fibrous material biogas fermentation of stalk discharging difficulty.

Description

Heli Upflow Anaerobic Reactor

technical field

The utility model relates to the fields of biogas engineering and environmental engineering, in particular to a combined force upward push-flow anaerobic reactor.

Background technique

The use of straw, energy plants and garbage as raw materials to produce biogas not only efficiently utilizes waste such as crop straw and garbage, but also solves the problem of idle biogas projects caused by insufficient raw materials for biogas from livestock and poultry manure. Due to the high cellulose content of straw, energy plants, garbage and cattle manure, lignocellulose is not easy to decompose during the anaerobic digestion process, and it is easy to stratify and form scum, which has poor fluidity and is difficult to discharge. At present, the biogas fermentation processes used for raw materials with high cellulose content such as crop stalks, energy plants, and garbage mainly include: liquid digestion, solid-state digestion, and solid-liquid two-phase digestion processes. Liquid digestion technology has been widely used in mixed raw materials abroad. However, due to the high moisture content of the material, this technology requires a large digester volume, high energy consumption for heating and stirring, and the microorganisms are easy to discharge and lose materials. Due to the high concentration of straw solids, it is difficult to feed and discharge materials. Batch-based feeding mainly includes film-covered tank dry type, garage (container) type and red mud plastic anaerobic digestion process, such as the announcement number CN2903075, the announcement date is 2007.5.23, the patent name is straw high solids constant pressure fermentation biogas digester , due to the characteristics of peak gas production and obvious underestimation in a single digestion cycle, most sequencing batch biogas projects operate in parallel with multiple reactors in different digestion stages. The sequence batch type has problems such as unstable production and high labor intensity for feeding and discharging materials. In the case of increasing labor prices, the application of this process in large and medium-sized biogas is becoming more and more restricted. The solid-liquid two-phase digestion process passes the solid phase The raw materials for fermentation and liquid phase fermentation are divided into different areas to achieve the separation of the acid-producing phase and the methanogenic phase, and cyclic inoculation is achieved by using biogas slurry reflux. Depending on the number of reactors, there are separated two-phase and integrated two-phase anaerobic digestion technologies. The separated two-phase process can be fed continuously through solid-phase digesters or parallel connection of multiple sequence batch digesters at different digestion stages To achieve continuous and stable operation of the entire system, such as the announcement number CN101857882A, announcement date 2010.10.13, the patent name is a two-stage anaerobic fermentation biogas production process of crop straw and livestock and poultry manure. Due to the setting of multiple digesters, the investment cost It is relatively high, and the two phases are difficult to completely separate, and the acidogenic phase tends to produce methane. The integrated two-phase anaerobic digestion technology is a continuous anaerobic process that realizes solid-phase and liquid-phase partition digestion in the same reactor, such as the announcement number CN101020912, the announcement date is 2007.8.22, the patent name is a method of refluxing and crushing methane bacteria The method of producing biogas by mixed fermentation of straw raw materials, this technology makes continuous and stable biogas production through continuous feeding and discharging, but it is still difficult to discharge. Such as the announcement number CN202379981U, the announcement date is 2012.8.15, the patent name is straw anaerobic fermentation baffle type discharge device, although the device has certain improvements in the straw anaerobic fermentation discharge technology, after repeated tests, it is still It is found that there are deficiencies, especially if the feeding and discharging cycle is greater than 2 days, the feed liquid is easy to harden at the corner of the bottom of the device, blocking the pipeline, and causing the feed liquid to not flow out normally.

Utility model content

The utility model overcomes the problem of difficulty in discharging materials in the biogas fermentation process of raw materials with high cellulose content such as straws in the prior art, and provides a combined force upward push-flow anaerobic method that solves the problem of difficult discharging materials in the biogas fermentation of straws and other high-fiber raw materials. reactor.

In order to achieve the above object, the utility model adopts the following technical solutions:

A Heli upward push-flow anaerobic reactor, which consists of an outer fermentation tank body, an inner fermentation tank body, a feed inlet, a feed pipe, a feed outlet, a discharge pipe, a fermentation tank cover, an exhaust port, and biogas Composed of exhaust pipes, the inner fermentation tank body is installed in the outer fermentation tank body, and the inner fermentation tank body and the outer fermentation tank body are coaxially arranged, and the feed inlet is installed on the outer wall of the outer fermentation tank The lower part, the feed inlet is connected to the feed pipe, the outlet is installed in the middle of the bottom wall of the inner fermentation tank, the outlet is connected to the outlet pipe, and the cover of the fermentation tank is installed on the outer fermentation tank. The upper part of the tank body, the exhaust port is installed on the upper part of the fermenter tank cover, and the exhaust port is connected with the biogas exhaust pipe.

In this technical scheme, through the double-layer fermentation tank body composed of the outer fermentation tank body and the inner fermentation tank body, the inner layer fermentation tank body plays the role of separating scum to a certain extent, and alleviates the formation of scum. Push-flow type, no need to stir, can save energy consumption. By adopting a double-layer structure, using the combined force of feed thrust, buoyancy, and biogas lift to push the feed liquid up, and then using the effect of gravity and biogas pressure to push the discharge , which solves the problem of difficult discharge of biogas fermentation of high-fiber raw materials such as straw.

A further technical solution is that the outer fermenter body is cylindrical, and the ratio of the inner diameter of the outer fermenter body to the height of the outer fermenter body is 1:3-5.

A further technical solution is that the inner fermenter body is cylindrical, and the ratio of the inner diameter of the inner fermenter body to the height of the inner fermenter body is 1:12-15.5.

A further technical solution is that the distance between the feed inlet and the bottom of the outer fermentation tank body is 200-400 mm.

A further technical solution is that the diameter of the outlet is 500-800mm.

A further technical solution is that the cover of the fermenter is conical, and the taper of the cover of the fermenter is 50-70 degrees.

Compared with the prior art, the beneficial effects of the utility model are:

1. The tank body of the fermentation tank adopts a double-layer design, and the tank body of the inner fermentation tank plays the role of separating scum to a certain extent, and alleviates the formation of scum;

2. Utilize the combined force of feed thrust, buoyancy, biogas rise, etc. to push the feed liquid to float up, and then use gravity and biogas pressure to push the discharge, which solves the problem of difficult discharge of high-fiber raw materials such as straw for biogas fermentation;

3. The fermentation raw material has wide adaptability, which can be used for biogas fermentation of high-fiber raw materials such as straw and energy plants, as well as for the fermentation of livestock and poultry manure raw materials.

Description of drawings

Fig. 1 is a schematic structural view of a Heli upward push-flow anaerobic reactor according to an embodiment of the present invention.

As shown in Figure 1, the names of the corresponding reference signs are:

1 Outer fermenter body, 2 Inner fermenter body, 3 Feed port, 4 Feed pipe, 5 Feed port, 6 Feed pipe, 7 Fermenter cover, 8 Exhaust port, 9 Biogas exhaust pipe .

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further elaborated.

Example 1

As shown in Fig. 1, a combined push-flow anaerobic reactor consists of an outer fermentation tank body 1, an inner fermentation tank body 2, a feed port 3, a feed pipe 4, a discharge port 5, and a discharge pipe 6. The fermenter tank cover 7, the exhaust port 8 and the biogas exhaust pipe 9 are composed, the inner fermenter tank body 2 is installed in the outer fermenter tank body 1, and the inner fermenter tank body 2 and the outer fermenter tank body The tank body 1 is coaxially arranged, the feed port 3 is installed on the lower part of the outer wall of the outer fermentation tank body 1, the feed port 3 is connected to the feed pipe 4, and the discharge port 5 is installed in the inner fermenter tank body 2 the middle part of the bottom wall, the discharge port 5 is connected to the discharge pipe 6, the fermenter tank cover 7 is installed on the top of the outer fermenter tank body 1, and the exhaust port 8 is installed on the top of the fermenter tank cover 7 In the upper part, the exhaust port 8 is connected with the biogas exhaust pipe 9 .

According to an embodiment of the present invention, the outer fermentation tank body 1 is cylindrical, and the ratio of the inner diameter of the outer fermentation tank body 1 to the height of the outer fermentation tank body 1 is 1:3.

According to an embodiment of the present invention, the inner fermentation tank body 2 is cylindrical, and the ratio of the inner diameter of the inner fermentation tank body 2 to the height of the inner fermentation tank body 2 is 1:12.

According to an embodiment of the present utility model, the distance between the feed port 3 and the bottom of the outer fermentation tank body 1 is 200 mm.

According to an embodiment of the present utility model, the diameter of the discharge port 5 is 500 mm.

According to an embodiment of the present utility model, the cover 7 of the fermenter is conical, and the taper of the cover 7 of the fermenter is 50 degrees.

Example 2

The difference between this embodiment and Example 1 is that the ratio of the inner diameter of the outer fermenter body 1 to the height of the outer fermenter body 1 is 1:4, and the ratio of the inner diameter of the inner fermenter body 2 to the height of the inner fermenter body 2 is 1:4. The ratio of the height of the fermentor tank body 2 is 1:14, the bottom of the fermentor tank body 1 outside the feed port 3 is 300mm, the diameter of the discharge port 5 is 650mm, and the fermentor tank cover 7 The taper is 60 degrees.

Example 3

The difference between this embodiment and Example 1 is that the ratio of the inner diameter of the outer fermenter body 1 to the height of the outer fermenter body 1 is 1:5, and the ratio of the inner diameter of the inner fermenter body 2 to the height of the inner fermenter body 2 is 1:5. The ratio of the height of the fermentation tank body 2 is 1:15.5, the bottom of the outer fermentation tank body 1 is 400 mm from the feed inlet 3, the diameter of the discharge port 5 is 800 mm, and the fermenter tank cover 7 The taper is 70 degrees.

The working principle of the utility model is as follows:

The fermentation raw material enters the outer fermentation tank body 1 of the biogas fermentation tank from the feed pipe 4 at the bottom of the biogas fermentation tank. , the feed liquid and scum rise to the upper part of the biogas fermentation tank, and are pushed to the entrance of the inner fermentation tank body 2 by force. Under the action of gravity and biogas pressure, the feed liquid and scum rise along the inner wall of the inner fermentation tank body It flows down naturally, and the feed liquid and scum are discharged from the discharge pipe 6, and the biogas enters the biogas exhaust pipe 9 from the upper part of the biogas fermentation tank, and acts on domestic fuel or power generation after purification.

The above specific embodiments describe the essence of the utility model in detail, but can not limit the protection scope of the utility model. Obviously, under the enlightenment of the utility model, those of ordinary skill in the art can also make many improvements and modifications. It should be noted that these improvements and modifications all fall within the protection scope of the claims of the present invention.

Claims (6)

1. A push-flow anaerobic reactor with combined force, consists of an outer fermenter tank body (1), an inner fermenter tank body (2), a feed port (3), a feed pipe (4), a discharge port ( 5), discharge pipe (6), fermentation tank cover (7), exhaust port (8) and biogas exhaust pipe (9), the inner fermentation tank body (2) is installed on the outer fermentation tank body (1), and the inner fermentation tank body (2) and the outer fermentation tank body (1) are coaxially arranged, and the feed inlet (3) is installed on the lower part of the outer wall of the outer fermentation tank body (1), The feed port (3) is connected to the feed pipe (4), the discharge port (5) is installed in the middle of the bottom wall of the inner fermentation tank body (2), and the discharge port (5) is connected to the discharge port (5). The feed pipe (6) is connected, the fermentor tank cover (7) is installed on the top of the outer fermenter tank body (1), and the exhaust port (8) is installed on the top of the fermenter tank cover (7). The exhaust port (8) is connected with the biogas exhaust pipe (9). 2. push-flow anaerobic reactor according to claim 1, it is characterized in that described outer fermenter tank body (1) is cylindrical, and the inner diameter of described outer fermenter tank body (1) and outer The height ratio of the fermentation tank body (1) is 1:3-5. 3. push-flow anaerobic reactor according to claim 1, it is characterized in that described inner fermenter tank body (2) is cylindrical, and the internal diameter of described inner fermenter tank body (2) and inner The height ratio of the fermenter body (2) is 1:12-15.5. 4. The Heli upward plug-flow anaerobic reactor according to claim 1, characterized in that the feed inlet (3) is 200-400mm from the bottom of the outer fermenter tank (1). 5. The Heli upward plug-flow anaerobic reactor according to claim 1, characterized in that the diameter of the outlet (5) is 500-800mm. 6. Heli push-flow anaerobic reactor according to claim 1, is characterized in that the fermentor tank cover (7) is conical, and the taper of the fermenter tank cover (7) is 50-70 degrees .