Supporting structure of stirring shaft of horizontal dry anaerobic reactor and reactor

Abstract

The utility model provides a supporting structure of a stirring shaft of a horizontal dry anaerobic reactor and the reactor, which are used for a large horizontal dry anaerobic reactor and comprise a supporting column and a roller carrier. The roller carrier comprises rollers and a roller support, the rollers are rotatably arranged on the roller support, and the roller support is fixedly connected into the reactor through a supporting column. The utility model also provides a horizontal dry anaerobic reactor which comprises a plurality of supporting structures arranged in the reactor in parallel. The roller is used for supporting the stirring shaft in the reactor when materials in the reactor are insufficient, when the materials in the reactor are sufficient, the stirring shaft and the stirring blades on the stirring shaft are subjected to buoyancy of the materials, the influence of self weight on the stirring shaft can be reduced, and when the materials are insufficient, the stirring shaft is influenced by the self weight, falls on the roller frame and is supported by the roller frame. The influence of dead weight on the stirring shaft is reduced.

Description

Technical Field

[0001] The utility model relates to a reactor, in particular to a supporting structure of a stirring shaft of a horizontal dry anaerobic reactor and a reactor. Background Art

[0002] Anaerobic fermentation can be divided into wet anaerobic and dry anaerobic according to the difference in solid content. Dry anaerobic has the characteristics of high volumetric load, high gas production rate, and easy handling of fermentation products, but it also has the disadvantages of long reaction cycle and easy acid inhibition and ammonia nitrogen inhibition.

[0003] At present, most of the dry anaerobic reactors used in industry are single-stage reactors. Good mixing of fresh materials and inoculated materials is the key to the stable operation of single-stage reactors. At present, material mixing is often achieved through biogas stirring or mechanical stirring. However, biogas stirring is prone to produce a scum layer. Therefore, mechanical stirring is more suitable for the mixing and heat transfer of materials in dry anaerobic reactors.

[0004] At present, dry anaerobic reactors often adopt a horizontal structure. The materials move in the reactor in a plug flow manner under the push of the feed. The stirring paddles often use spirally distributed blades. The main purpose is to prevent heavy materials from sinking to the bottom of the reactor. In addition, stirring can promote the release of biogas. The blades are installed on the central axis tube.

[0005] According to engineering experience, the reactor body length-to-diameter ratio is 3-5. As the equipment becomes larger, the reactor volume in engineering is about 2000-3000m 3 , some even reach 4000m 3 , the length of the stirring shaft is about 35~45m, and some even reach 50m. When the material submerges the stirring shaft, the buoyancy of the stirring shaft can offset the gravity, and the deflection of the stirring shaft is not large.

[0006] Due to the particularity of the industry, during the commissioning stage of the project, especially the installation stage, the shell of the large anaerobic reactor is in a state where the material cannot submerge the agitator shaft, or even there is no material. In addition, during the operation, there may be a serious lack of load, causing the agitator shaft to be suspended for a long time, and the gravity is much greater than the buoyancy, resulting in excessive deflection of the agitator shaft, severe bending or even damage of the agitator shaft, causing the equipment to be unable to operate. Utility Model Content

[0007] The utility model provides a supporting structure for a stirring shaft of a horizontal dry anaerobic reactor, which is used for a large-scale horizontal dry anaerobic reactor and comprises a support column and a roller frame.

[0008] The roller frame includes a roller and a roller bracket. The roller is rotatably arranged on the roller bracket, and the roller bracket is fixedly connected in the reactor through a support. The roller is used to support the stirring shaft in the reactor when the material in the reactor is insufficient. When the material in the reactor is sufficient, the stirring shaft and the stirring blades thereon are affected by the buoyancy of the material, which can reduce the influence of the self-weight on the stirring shaft. When the material is insufficient, the stirring shaft is affected by its own weight and falls on the roller frame, and the roller frame provides support, which reduces the influence of the self-weight on the stirring shaft.

[0009] Furthermore, it also includes a support frame, and the roller bracket is fixed on the support frame.

[0010] Furthermore, the support frame is made of square steel, the roller bracket is fixed in the support frame, the inner contour formed by the support frame and the roller bracket is larger than the outer contour of the stirring shaft, and the support frame is fixedly connected in the reactor through a connecting support.

[0011] Furthermore, one diagonal line of the square steel cross section is vertically arranged, and the other diagonal line is horizontally arranged. The roller bracket is fixed at the lowest position in the square steel to increase the utilization rate of the space in the square steel.

[0012] Furthermore, a polytetrafluoroethylene gasket is provided inside the support frame to prevent accidental friction between the stirring shaft and the support frame.

[0013] The utility model also provides a horizontal dry anaerobic reactor, comprising a plurality of the above-mentioned supporting structures which are arranged in parallel in the reactor.

[0014] The utility model solves the problem that when the material in a large horizontal dry anaerobic reactor does not completely submerge the stirring shaft, the stirring shaft is suspended for a long time, the gravity is much greater than the buoyancy, the stirring shaft deflects too much, the stirring shaft is seriously bent or even damaged, and the equipment cannot operate.

[0015] The supporting structure of the utility model is stable and reliable, can operate for a long time, and meets engineering requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the support structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the installation of the roller frame in the utility model;

[0019] In the figure: 1. pillar; 2. roller frame; 3. roller; 4. roller bracket; 5. reactor; 6. support frame; 7. PTFE gasket; 8. stirring shaft. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0021] See also Figure 1 , Figure 2 The supporting structure of this embodiment includes a pillar 1 and a roller frame 2. The roller frame 2 includes a roller 3 and a roller bracket 4. The roller 3 is rotatably arranged on the roller bracket 4. The roller bracket 4 is fixedly connected to the reactor 5 through the pillar 1. Preferably, this embodiment also includes a support frame 6, and the roller bracket 4 is fixed on the support frame 6.

[0022] The support frame 6 is preferably a square steel, and the roller bracket 4 is fixed in the square steel. The inner contour formed by the support frame 6 and the roller bracket 2 is larger than the outer contour of the stirring shaft 8, and the support frame 6 is fixedly connected to the reactor 5 through the connecting pillar 1. Further, one diagonal line of the square steel cross section is vertically arranged, and the other diagonal line is horizontally arranged. The roller bracket 4 is fixed at the lowest position in the square steel to increase the utilization rate of the space in the square steel.

[0023] The roller 3 is used to support the stirring shaft 8 in the reactor 5 when the material in the reactor 5 is insufficient. When the material in the reactor 5 is sufficient, the stirring shaft 8 and the stirring blades thereon are affected by the buoyancy of the material, which can reduce the influence of the dead weight on the stirring shaft 8. When the material is insufficient, the roller 3 is in contact with the stirring shaft 8. During the rotation of the stirring shaft 8, the roller 3 will also rotate accordingly. At the same time, the roller 3 can support the stirring shaft 8, thereby preventing the stirring shaft 8 from being damaged due to excessive deflection.

[0024] A PTFE gasket 7 is also provided inside the support frame 6, which is arranged on the two lower sides of the square steel to prevent direct contact between the stirring shaft 8 and the support frame 6 in extreme cases where the roller 3 is damaged or the material is seriously insufficient, thereby protecting the stirring shaft 8. Example

[0025] The utility model is a horizontal dry anaerobic reactor, comprising a plurality of supporting structures in the above embodiment arranged in parallel in a reactor 5, wherein a stirring shaft 8 is arranged on a plurality of roller frames 2 to prevent the stirring shaft 8 from being deformed and damaged when materials are insufficient.

[0026] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A support structure for a stirring shaft of a horizontal dry anaerobic reactor, used in a large horizontal dry anaerobic reactor, characterized in that: It includes a support and a roller frame; the roller frame includes a roller and a roller bracket, the roller is rotatably arranged on the roller bracket, and the roller bracket is fixedly connected in the reactor through the support; the roller is used to support the stirring shaft in the reactor when the material in the reactor is insufficient.

2. The support structure of the stirring shaft of the horizontal dry anaerobic reactor according to claim 1, characterized in that: The utility model also comprises a supporting frame, and the roller bracket is fixed on the supporting frame.

3. The support structure of the stirring shaft of the horizontal dry anaerobic reactor according to claim 2, characterized in that: The support frame is made of square steel, and the roller bracket is fixed in the support frame; the inner contour formed by the support frame and the roller bracket is larger than the outer contour of the stirring shaft, and the support frame is fixedly connected in the reactor through a connecting support.

4. The support structure of the stirring shaft of the horizontal dry anaerobic reactor according to claim 3, characterized in that: One diagonal line of the square steel cross section is vertically arranged, and the other diagonal line is horizontally arranged; the roller bracket is fixed at the lowest position in the square steel.

5. The support structure of the stirring shaft of the horizontal dry anaerobic reactor according to claim 4, characterized in that: A polytetrafluoroethylene gasket is arranged inside the support frame to prevent accidental friction between the stirring shaft and the support frame.

6. A horizontal dry anaerobic reactor, characterized in that: The invention comprises a plurality of support structures as claimed in any one of claims 1 to 5 which are arranged in parallel in the reactor.

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