CN213416867U - Horizontal dry anaerobic fermentation reactor with double-layer stirring structure - Google Patents

Abstract

The utility model provides a horizontal dry process anaerobic fermentation reactor of double-deck stirring structure, including the reactor main part with set up in double-deck stirring structure in the reactor main part, double-deck stirring structure including set up in at least one upper agitator on reactor main part upper portion with set up in at least one lower floor's agitator of reactor main part lower part, upper agitator includes the frame agitator, lower floor's agitator includes single-oar formula agitator. The utility model provides a double-deck stirring structure horizontal dry process anaerobic fermentation reactor adopts upper and lower double-deck stirring structure, can realize efficient heat and mass transfer to can make the anaerobic fermentation system tend to the complete mixed flow state, reinforcing anaerobic digestion effect.

Description

Horizontal dry anaerobic fermentation reactor with double-layer stirring structure

Technical Field

The utility model relates to a waste treatment technical field, specifically, the utility model relates to a horizontal dry process anaerobic fermentation reactor of double-deck stirring structure.

Background

With the increase of organic garbage in urban and rural areas year by year, the organic matters of the garbage are consumed by the anaerobic fermentation technology to generate methane and the like, so that the reduction and resource treatment of the organic garbage can be realized. A large amount of dilution water is required to be added in the traditional wet anaerobic fermentation treatment, the solid content in a treatment system is low, the volumetric gas production rate is low, the anaerobic digestion treatment capacity and biogas slurry production capacity are increased, the treatment cost of anaerobic digestion, biogas residues and biogas slurry in the later period is increased, in addition, the requirement of the wet anaerobic digestion on the pretreatment of organic garbage is high, the volume of a required reactor device is large, and the investment cost is increased.

Compared with wet anaerobic fermentation, the method has the advantages that anaerobic digestion can be carried out by utilizing dry anaerobic fermentation under the condition that garbage is kept in an original state, water supplement and dilution are not needed, higher solid concentration is kept, water resources and energy consumption are saved, the biogas slurry production amount is small, recycling is easy to realize, and zero emission of biogas slurry in a fermentation system can be achieved. In addition, the dry anaerobic fermentation has strong inert impurity resistance, has low requirement on the pretreatment of materials entering a fermentation system, and can reduce the pretreatment cost.

However, although dry anaerobic fermentation has many advantages over wet anaerobic fermentation, the problems of poor mass and heat transfer of the fermentation system, unstable biogas production, etc. still exist due to the low homogenization level in the dry anaerobic system.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.

The embodiment of the utility model provides a be not enough to prior art, the embodiment of the utility model provides a horizontal dry process anaerobic fermentation reactor of double-deck stirring structure, the horizontal dry process anaerobic fermentation reactor of double-deck stirring structure include the reactor main part with set up in double-deck stirring structure in the reactor main part, double-deck stirring structure including set up in at least one upper agitator on reactor main part upper portion with set up in at least one lower floor's agitator of reactor main part lower part, upper agitator includes the frame agitator, lower floor's agitator includes single-oar formula agitator.

Illustratively, the horizontal positions of the upper layer stirrer and the lower layer stirrer are staggered.

Illustratively, the upper agitator and the lower agitator operate synchronously.

Illustratively, the upper agitator and the lower agitator counter-rotate.

Illustratively, the upper agitator rotates counterclockwise and the lower agitator rotates clockwise.

Illustratively, the ratio of the number of the upper layer stirrers to the number of the lower layer stirrers is 2: 3.

Illustratively, the ratio of the number of paddles of the upper agitator to the number of paddles of the lower agitator is 1: 2.

Illustratively, the plurality of stirring paddles of the frame stirrer are arranged on the same plane.

Illustratively, the plurality of paddles of the single paddle agitator are perpendicular to each other.

Illustratively, the upper agitator and the lower agitator operate alternately.

The horizontal dry anaerobic fermentation reactor with the double-layer stirring structure provided by the utility model adopts a plurality of stirrers on the upper layer and the lower layer, the stirring paddle blades are short, the torsion is small, the stirring effect can be enhanced by improving the rotating speed of the stirrers, and the efficient heat and mass transfer is realized; in addition, in the double-layer stirring structure, the upper-layer stirrer adopts a frame-type stirrer, and the lower-layer stirrer adopts a single-paddle stirrer, so that the functions of floating medium shell breaking, methane release, sediment movement and material plug flow are realized, and meanwhile, an anaerobic fermentation system tends to a fully mixed flow state, and the anaerobic digestion effect is enhanced.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles and devices of the invention. In the drawings, there is shown in the drawings,

FIG. 1 is a front view of a horizontal dry anaerobic fermentation reactor with a double-layer stirring structure according to an embodiment of the present invention;

FIG. 2 is a top view of a horizontal dry anaerobic fermentation reactor with a double-layer stirring structure according to an embodiment of the present invention;

fig. 3 is a perspective view of a horizontal dry anaerobic fermentation reactor with a double-layer stirring structure in an embodiment of the present invention.

Reference numerals:

101: a feed inlet;

102: an air outlet;

103: a material circulation pipeline;

104: a circulating feed inlet;

105: a circular discharge hole;

106: a discharge port;

107: an upper layer stirrer;

108: a lower layer stirrer.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

In order to thoroughly understand the present invention, detailed steps will be provided in the following description in order to explain the horizontal dry anaerobic fermentation reactor of the double-stirring structure proposed by the present invention. It is apparent that the practice of the invention is not limited to the specific details known to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

In order to thoroughly understand the present invention, a detailed structure will be provided in the following description in order to explain the technical solution provided by the present invention. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.

The homogenization of materials in an anaerobic fermentation system needs to overcome the large force difference between the gravity and the buoyancy of coarse particles and the friction force among material particles and between the material particles and the wall of a tank body, the anaerobic fermentation reaction device can realize turbulent vortex to achieve homogenization by improving the stirring strength, but because a dry anaerobic system is a multiphase flow system with high solid content rate, the traditional dry anaerobic reactor adopts a longitudinal long shaft stirring device, and because the lengths of a stirring shaft and a stirring paddle are large, the higher rotating speed causes larger torsion, the traditional dry anaerobic device has slower rotating speed and poor mixing effect, and can not realize efficient heat and mass transfer.

Based on this, the embodiment of the utility model provides an adopt horizontal dry process anaerobic fermentation reactor of double-deck stirring structure, when realizing that floating medium breaks the shell, marsh gas release, removes the sediment function, can also make anaerobic fermentation system tend to the complete mixed flow state, reinforcing anaerobic digestion effect.

The horizontal dry anaerobic fermentation reactor with a double-layer stirring structure of the present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the horizontal dry anaerobic fermentation reactor with double-layer stirring structure according to an embodiment of the present invention includes a reactor main body 100 and a double-layer stirring structure disposed in the reactor main body 100, the double-layer stirring structure includes an upper layer stirrer 107 disposed on the upper portion of the reactor main body 100 and a lower layer stirrer 108 disposed on the lower portion of the reactor main body 100, the upper layer stirrer 107 includes a frame stirrer, and the lower layer stirrer 108 includes a single-paddle stirrer.

The utility model discloses two-layer double-deck stirring structure about the horizontal dry process anaerobic fermentation reactor of double-deck stirring structure adopts, and stirring paddle leaf is short, and torsion is little, can realize efficient heat and mass transfer through improving agitator rotational speed reinforcing stirring effect. Meanwhile, the upper layer stirrer 107 in the double-layer stirring structure adopts a frame type stirrer, and the lower layer stirrer 108 adopts a single-paddle type stirrer, so that the functions of floating medium shell breaking, methane release, sediment movement and material plug flow are realized, and meanwhile, a dry anaerobic fermentation system in the stirrer can be enabled to tend to a fully mixed flow state, and the anaerobic digestion effect is enhanced.

Specifically, with continued reference to fig. 1, the anaerobic fermentation reactor provided by the embodiment of the present invention is a horizontal anaerobic fermentation reactor, and the reactor main body 100 is a horizontal reactor main body, specifically, a single-layer lateral-entry horizontal reactor main body, that is, the material moves in a plug-flow manner under the push of the feeding material in the reactor main body. Compared with a vertical anaerobic fermentation reactor, the material mass transfer in the horizontal anaerobic fermentation reactor is more uniform. With continued reference to fig. 1, a feed inlet 101 is disposed at one end of the reactor body 100, the feed inlet is communicated with a delivery pump through a pipeline, a discharge outlet 106 is disposed at the other end of the reactor body to achieve the purpose of discharging in a pumping manner, and after the material enters the interior of the reactor body 100 through the feed inlet 101, the material gradually moves towards the discharge outlet 106 and is subjected to dry anaerobic fermentation in the interior of the reactor body 100.

In some embodiments, the front end and the rear end of the reactor body 100 are further provided with a circulation feed inlet 104 and a circulation discharge outlet 105, respectively, which are communicated with each other through a material circulation pipe 103, thereby realizing the circulation of the material.

The dry anaerobic fermentation can treat organic wastes with high solid content, the solid content of the materials can reach 25-35%, and the pretreatment cost of raw materials before fermentation is low. Illustratively, the anaerobic fermentation process can be divided into hydrolysis, acidification, methanogenesis and other stages, wherein the front end of the reactor mainly takes hydrolysis and acidification as main steps, and the rear end of the reactor mainly takes methanogenesis as main steps. Since methane is mainly generated in the rear section of the reactor, the upper portion of the rear section of the reactor main body 100 is further provided with a gas outlet 102 for discharging methane gas inside the reactor main body 100, and the gas outlet 102 is communicated with a gas collecting cavity for collecting methane gas.

The upper stirrer 107 is provided at the upper part of the reactor main body 100, and the lower stirrer 108 is provided at the lower part of the reactor main body 100. The upper stirrer 107 and the lower stirrer 108 include a stirring shaft and a stirring paddle, and further include a speed change device and a motor (not shown) connected to the stirring shaft through the speed change device. Both ends of the stirring shaft provided with a plurality of groups of stirring blades penetrate through both sides of the reactor main body 100.

Furthermore, the number of the upper layer stirrer 107 and the lower layer stirrer 108 is more than two, and the more than two upper layer stirrers 107 are arranged at the same height and distributed at equal intervals; the two or more lower stirrers 107 are disposed at the same height and are equidistantly distributed, thereby dividing the interior of the reactor body 100 into a set of consecutive fermentation units. For the upper stirrer 107 and the lower stirrer 108, the distance between two adjacent stirring shafts is slightly larger than the rotating diameter of the two stirring paddles, and the stirring paddles of the stirrers form vertical material exchange in the stirring areas where the stirrers are respectively located, and simultaneously, the stirring paddles send the accumulated bottom materials to the rotating area of the rear-stage stirring paddle through the paddle wing parts, and the materials are continuously conveyed backwards by the rear-stage stirring paddle, and the steps are repeated, so that the backward conveying of the deposited materials is completed, and the materials are prevented from being deposited at the bottom of the reactor main body 100.

The embodiment of the utility model adopts an upper and lower double-layer stirring structure, the stirring paddle of the upper layer stirrer 107 is a frame type stirring paddle, and specifically can be a rectangular frame type stirring paddle consisting of two vertical frames and a transverse frame connected between the two vertical frames; the stirring paddle of the lower layer stirrer 108 is a single-blade stirring paddle, and specifically may be a T-shaped stirring paddle formed by a vertical frame and a horizontal frame arranged at the end of the vertical frame. The frame type stirrer on the upper layer has large area and high strength, can quickly realize shell breaking and dispersion of materials and strengthen material suspension and methane emission; the single-blade stirrer on the lower layer has small stirring torque force, can quickly disturb high-density materials and impurities which are easy to settle, and prevents the high-density materials and the impurities from being deposited at the bottom of the reactor main body 100.

Both the upper agitator 107 and the lower agitator 108 can rotate in the forward and reverse directions. In one embodiment, the upper stirrer 107 and the lower stirrer 108 may operate simultaneously and rotate in opposite directions, for example, the upper stirrer 107 may rotate counterclockwise and the lower stirrer 108 may rotate clockwise, so that the materials circulate in the reactor, the heat and mass transfer is enhanced, the completely mixed anaerobic fermentation process is realized, and the biogas production efficiency is improved. According to the actual operation requirement of the dry anaerobic fermentation engineering, in order to keep the reactor to stably operate, the upper layer stirrer 107 and the lower layer stirrer can also alternately operate, and the rotation direction can be adjusted according to the requirement.

In one embodiment, the ratio of the number of upper stirrers 107 and lower stirrers 108 may be set to 2:3, for example, the number of the upper layer stirrers 107 is set to 2, the number of the lower layer stirrers is set to 3, and the upper layer stirrers 107 and the lower layer stirrers 108 are alternately arranged in a staggered manner, and each upper layer stirrer 107 is arranged above a position between the two lower layer stirrers 108, thereby preventing the mutual influence between the upper layer stirrers 107 and the lower layer stirrers 108 on the stirring effect. The number ratio of the stirring paddles of the upper stirrer 107 and the lower stirrer 108 may be 1:2, for example, 4 frame-type stirring paddles are provided for each upper stirrer 107, and 8 single-blade-type stirring paddles are provided for each lower stirrer 108. Illustratively, the angle between the stirring paddles of the upper-layer stirrer is 180 degrees, namely, the frame-type stirring paddles of each frame-type stirrer are distributed on the same plane; the angle between the stirring paddles of the lower layer of the stirrer is 90 degrees, namely the adjacent stirring paddles are vertical to each other. By adopting the configuration, the materials can be fully mixed.

The material enters the reactor body 100 through the feed port 101, and the outlet of the feed port 101 is below the level to prevent biogas leakage. The materials are stirred by the upper layer stirrer 107 and the lower layer stirrer 108 to realize high-temperature high-solid anaerobic fermentation to produce biogas, and the biogas is discharged through the gas outlet 102. The digestate at the tail end of the reactor is discharged through a circulating discharge port 105, flows back to the front end of the reactor through a material circulating pipeline 103, enters the reactor main body 100 through a circulating feed port 104 again, and is used for carrying out microbial inoculation on newly fed materials, so that the anaerobic digestion efficiency is improved.

Based on the above description, the embodiment of the present invention provides a horizontal dry anaerobic fermentation reactor with a double-layer stirring structure, which has the following advantages:

1) the stirring shaft and the stirring paddle are short, so that the stirring device is easy to manufacture and stable to operate;

2) the double-layer stirring structure adopts different stirrers, so that specific functions can be realized respectively, the upper-layer stirrer is a frame-type stirrer, so that shell breaking and dispersion of materials, material suspension and biogas discharge are realized, and the lower-layer stirrer is a single-paddle stirrer, so that high-density materials and impurities which are easy to settle are disturbed, and material deposition is prevented;

3) the upper layer stirrer and the lower layer stirrer can rotate and stir along opposite directions, so that heat transfer and mass transfer are effectively enhanced, and the completely mixed anaerobic fermentation process is realized.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a horizontal dry process anaerobic fermentation reactor of double-deck stirring structure, its characterized in that, including the reactor main part with set up in double-deck stirring structure in the reactor main part, double-deck stirring structure including set up in at least one upper agitator on reactor main part upper portion with set up in at least one lower floor's agitator of reactor main part lower part, the upper agitator includes the frame agitator, the agitator of lower floor includes single-oar formula agitator.

2. The horizontal dry anaerobic fermentation reactor with double-layer stirring structure as claimed in claim 1, wherein the upper layer stirrer and the lower layer stirrer are arranged in a staggered manner.

3. The horizontal dry anaerobic fermentation reactor with double-layer stirring structure according to claim 1, wherein the upper layer stirrer and the lower layer stirrer run synchronously.

4. The horizontal dry anaerobic fermentation reactor with double-layer stirring structure according to claim 1, wherein the upper layer stirrer and the lower layer stirrer rotate in opposite directions.

5. The horizontal dry anaerobic fermentation reactor with double-layer stirring structure according to claim 4, wherein the upper layer stirrer rotates counterclockwise and the lower layer stirrer rotates clockwise.

6. The horizontal dry anaerobic fermentation reactor with double-layer stirring structure as claimed in claim 1, wherein the ratio of the number of the upper layer of the stirrers to the number of the lower layer of the stirrers is 2: 3.

7. The horizontal dry anaerobic fermentation reactor with double-layer stirring structure as claimed in claim 1, wherein the ratio of the number of the stirring paddles of the upper-layer stirrer to the number of the stirring paddles of the lower-layer stirrer is 1: 2.

8. The horizontal dry anaerobic fermentation reactor with double-layer stirring structure according to claim 7, wherein the stirring paddles of the frame stirrer are arranged on the same plane.

9. The horizontal dry anaerobic fermentation reactor with double-layer stirring structure according to claim 7, wherein the adjacent stirring paddles of the single-paddle stirrer are perpendicular to each other.

10. The horizontal dry anaerobic fermentation reactor with double-layer stirring structure according to claim 1, wherein the upper layer stirrer and the lower layer stirrer operate alternately.

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