CN212610185U

CN212610185U - High-efficient anaerobic fermentation jar airtight formula end support agitating unit

Info

Publication number: CN212610185U
Application number: CN202021066564.2U
Authority: CN
Inventors: 王冬艳; 王彧; 刘菲; 李银萍; 王冬琦; 金树威
Original assignee: Liaoning Beifang Environmental Protection Co ltd; Liaoning Environmental Protection Group Co ltd
Current assignee: Liaoning Beifang Environmental Protection Co ltd; Liaoning Environmental Protection Group Co ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-02-26
Anticipated expiration: 2030-06-11

Abstract

A gas-sealed bottom-supported stirring device of a high-efficiency anaerobic fermentation tank belongs to the technical field of environment-friendly equipment. Including (mixing) shaft I, the bearing frame, the end bearing, the axle sleeve, the top gland, pneumatic seal device, the internal bottom of jar is arranged in to the bearing frame, the bearing frame inner circle sets up the end bearing, set up the axle sleeve of installing in I one end of (mixing) shaft in the end bearing, the sleeve cover is put on (mixing) shaft I, one end is connected with the outer lane of bearing frame, the other end link collar is put the top gland on (mixing) shaft I, form between sleeve and bearing frame inner circle and subside the chamber, form the air cavity between sleeve and top gland, set up pneumatic seal device on (mixing) shaft I in the air cavity, it has the inlet port and the trachea of erection joint air source to open on the top gland, the (mixing) shaft II of flange joint. The invention reduces the load of the tank top and improves the safety of the tank top. The pneumatic sealing device effectively prevents fine sand from entering the bottom bearing.

Description

High-efficient anaerobic fermentation jar airtight formula end support agitating unit

Technical Field

The invention belongs to the technical field of environment-friendly equipment, and particularly relates to an air-sealed bottom-supported stirring device of a high-efficiency anaerobic fermentation tank.

Background

According to the statistics of Ministry of agriculture, about 38 hundred million tons of livestock and poultry manure is generated in 1 year in China, 40 percent of the livestock and poultry manure cannot be effectively utilized, and the healthy development of livestock and poultry breeding in China is severely restricted. The livestock and poultry manure is not treated and is a pollutant, if the livestock and poultry manure is used for preparing biogas through anaerobic fermentation, clean energy can be obtained, and biogas slurry and biogas residues after reaction are high-quality fertilizers. The scientific and reasonable resource utilization of the livestock and poultry feces can effectively improve the ecological environment, increase the economic benefit of the farm and realize the harmony and unity of the livestock breeding and the ecological construction.

The biogas engineering is a rural energy engineering technology which aims at developing and utilizing the feces of the farm to obtain energy and control the environment and realize the virtuous cycle of ecology and mainly comprises anaerobic fermentation equipment and matched process technology.

The high-efficiency anaerobic fermentation tank is an anaerobic treatment technology in which fermentation raw materials and microorganisms are in a mixed state. The material gets into from the lower extreme of fermentation cylinder, and mechanical agitating unit is installed at the top of fermentation cylinder, makes the raw materials of newly-advancing and the methane-producing flora intensive mixing in the fermentation cylinder, and mechanical stirring's stirring effect is one of whole fermentation cylinder reaction efficiency's key factor.

The stirring mode of the anaerobic fermentation tank is mainly top stirring, and the weight of the stirring paddle is completely born by the tank top. The top stirring structure is relatively simple and is the most widely applied form at present. The tank body of the fermentation tank mainly has three forms of a concrete structure, a steel welding structure and an assembling structure, the assembling tank is factory-made, the field construction period is short, the cost is relatively low, and the application range is wide, but the tank top of the assembling tank is formed by assembling a plurality of triangular arc-shaped plates, the gravity load and the dynamic load born by the assembling structure are limited, particularly the periodic dynamic load can cause the sealing failure of the tank top, and the methane leakage accident can occur. Therefore, the design values of the rotating speed of the stirring shaft I and the diameter of the blades of the assembled tank body are smaller, and particularly, the structural form of double-layer blades is rarely adopted, so that the stirring effect of the whole system is poor, and the efficiency is lower. The I end of the stirring shaft is supported by a bearing arranged at the bottom of the I stirring shaft, the force received by the tank top is transferred to the bottom of the tank body, and meanwhile, the I tank top of the stirring shaft and the tank bottom are double-limited, so that the influence of periodic dynamic load on the tank top caused by the poor installation of a cantilever shaft or the poor machining precision is greatly reduced. The anaerobic jar material solid content is on the high side, generally contains fine sand, for protecting the end bearing, must establish sealed protection, and conventional end bearing adopts swivel bearing more, supporting mechanical seal, and end support operation is under sewage, and operational environment is abominable, and mechanical seal is volatile to be imitated and is leaded to the unable operation of mixing system, and the maintenance of anaerobic jar needs the whole jar of raw materials of emptying, and maneuverability is extremely poor, so the application of end support on anaerobic reactor is still not general.

Disclosure of Invention

Aiming at the technical problems, the invention provides the high-efficiency anaerobic fermentation tank air-sealing type bottom support stirring device, which is characterized in that a bottom bearing is arranged at the bottom of the tank body of the anaerobic fermentation tank, the bottom bearing bears the axial load of a stirring shaft I, the load of the tank top is reduced, and the safety of the tank top is improved.

The purpose of the invention is realized by the following technical scheme:

the invention relates to an air-sealed bottom support stirring device of a high-efficiency anaerobic fermentation tank, which comprises a stirring shaft I, a bearing seat, a bottom bearing, a shaft sleeve, a top gland and a pneumatic sealing device, wherein the stirring shaft I, the bearing seat, the bottom bearing, the shaft sleeve, the top gland and the pneumatic sealing device are arranged in a tank body, the bearing seat is arranged at the bottom in the tank body, the inner ring of the bearing seat is provided with the bottom bearing, the shaft sleeve arranged at one end of the stirring shaft I is arranged in the bottom bearing, the sleeve is sleeved on the stirring shaft I, one end of the sleeve is connected with the outer ring of the bearing seat, the other end of the sleeve is connected with the top gland sleeved on the stirring shaft I, a sedimentation cavity is formed between the sleeve and the inner ring of the bearing seat, an air cavity is formed between the sleeve and the top gland, the pneumatic sealing device is arranged on the, the bottom of the tank body is provided with a drain pipe communicated with the sedimentation cavity, and the end part of the drain pipe extending out of the tank body is provided with a ball valve.

Preferably, the pneumatic sealing device comprises two static sealing rings and a dynamic sealing ring, the dynamic sealing ring is sleeved on the stirring shaft I, and the two static sealing rings are respectively arranged at the upper end and the lower end of the dynamic sealing ring and are respectively connected with the sleeve and the top gland.

Preferably, the two sides of the movable sealing ring are provided with bosses, the static sealing ring is provided with a groove matched with the movable sealing ring boss, and the static sealing ring is matched with the bosses for limiting through the groove.

Preferably, the boss has a plurality of tangential surfaces on the periphery thereof, and the groove of the static sealing ring also has a tangential surface matched with the groove.

Preferably, the bearing seat is formed by arranging a cylindrical structure at one side in the disc, an outer ring is formed at the periphery of the disc, an inner ring is formed in the cylindrical structure, the inner ring is matched with the bottom bearing, and a drain pipe communicated with the sedimentation cavity is arranged at the bottom of the bearing seat.

Preferably, the stirring shaft I and the sleeve are fixedly connected through a locking screw I.

Preferably, the shaft sleeve is of a T-shaped sleeve structure, and a shaft shoulder of the shaft sleeve is in end face contact with the bottom bearing.

Preferably, the bottom bearing is a self-lubricating bearing, and the self-lubricating bearing is fixed with the inner ring of the bearing seat through a locking screw II.

Preferably, the air pipe is provided with an electric pressure meter and an electromagnetic valve outside the tank body.

Preferably, the splash guard is a frustum-shaped annular plate, is welded on the stirring shaft I and blocks fine sand deposited in the liquid at the top; the baffle plate is an inverted frustum-shaped annular plate, is welded on the top gland and is positioned in the fender, a conical annular space is formed between the baffle plate and the fender, and the minimum gap between the baffle plate and the fender is 2-4 mm.

The invention has the beneficial effects that:

1. according to the invention, the bottom bearing is arranged at the bottom of the tank body, and bears the axial load of the stirring shaft I, so that the load of the tank top is reduced, and the safety of the tank top is improved. In order to ensure the long-term operation of the bottom bearing and prevent particles such as fine sand from entering the bottom bearing to cause bearing abrasion, compressed air is utilized to push a movable sealing ring of the pneumatic sealing device, the movable sealing ring tightly holds the stirring shaft I for sealing, the conventional mechanical seal is replaced, and the fine sand is effectively prevented from entering the bottom bearing.

2. The pneumatic sealing device adopts the matching of the movable sealing ring and the static sealing ring, the movable sealing ring is made of nitrile rubber, the nitrile rubber has strong wear resistance and corrosion resistance, large elasticity, wear resistance and corrosion resistance, and a certain gap is allowed between the stirring shaft and the pneumatic sealing device, so that the requirements on the processing precision and the installation precision of the stirring shaft are reduced. Compressed air promotes and moves the sealing ring and be close to (mixing) shaft I, has effectively prevented that fine sand from getting into the end bearing.

3. The fender effectively blocks the fine sand settled at the top, and the baffle plate effectively blocks the fine sand suspended at the bottom driven by the methane, so that the bottom bearing is secondarily protected

4. The bottom bearing of the invention adopts the self-lubricating bearing, the installation accuracy requirement of the self-lubricating bearing is low, the later maintenance can be avoided, the structure greatly reduces the requirements of the manufacturing and installation accuracy of the stirring shaft I, increases the reliability of the system, prolongs the service life of the bottom support, and has more obvious advantages especially for large-diameter anaerobic tanks.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a block diagram of the present invention.

Fig. 2 is a schematic perspective view of the dynamic seal ring in fig. 1.

Fig. 3 is a schematic plan view of fig. 2.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a schematic perspective view of the static sealing ring in fig. 1.

Fig. 6 is a schematic plan view of fig. 5.

Fig. 7 is a top view of fig. 6.

In the figure, 1, a stirring shaft I, 2, a top gland, 3, a static sealing ring, 31, a groove, 4, a movable sealing ring, 41, a boss, 5, a fastening bolt I, 6, an O-shaped sealing ring I, 7, a sleeve, 8, a shaft sleeve, 9, a locking screw I, 10, a locking screw II, 11, a bottom bearing, 12, a bearing seat, 13, a fastening bolt II, 14, an O-shaped sealing ring II, 15, a tank body, 16, a drain pipe, 17, a ball valve, 18, an electric contact pressure gauge, 19, an electromagnetic valve, 20, an air pipe, 21, an air cavity, 22, a baffle plate, 23, a stirring shaft, 24, a connecting flange, 25, an isolation cavity, 26, a fastening bolt III, 27, II and 28 are arranged in sequence.

Detailed Description

The technical scheme of the invention is clearly and completely described below by combining the drawings and the embodiment.

Example 1: the invention relates to an air-sealing type bottom support stirring device of a high-efficiency anaerobic fermentation tank, which comprises a stirring shaft I1, a bearing seat 12, a bottom bearing 11, a shaft sleeve 8, a sleeve 7, a top gland 2 and a pneumatic sealing device, wherein the stirring shaft I1, the bearing seat 12, the bottom gland 2 and the pneumatic sealing device are arranged in a tank body 15, the bearing seat 12 is arranged at the bottom in the tank body 15, the bottom bearing 11 is arranged at the inner ring of the bearing seat 12, the shaft sleeve 8 arranged at one end of the stirring shaft I1 is arranged in the bottom bearing 11, the sleeve 8 is sleeved on the stirring shaft I1, one end of the sleeve 8 is connected with the outer ring of the bearing seat 12, the other end of the sleeve is connected with the top gland 2 sleeved on the stirring shaft I1 through a fastening bolt I5, a sedimentation cavity 28 is formed between the sleeve 7 and the inner ring of the bearing seat 12, an air cavity 21 is formed between the sleeve 8 and the, one end of the air pipe 20 is communicated with the air cavity 21, the other end of the air pipe is connected with an air source, the other end of the stirring shaft I1 is connected with a stirring shaft II 26 of the anaerobic fermentation tank through a connecting flange 24, the bottom of the tank body 15 is provided with a drain pipe 16 communicated with a sedimentation cavity 28, and the end part of the drain pipe 16 extending out of the tank body 15 is provided with a ball valve 17.

The pneumatic sealing device comprises two static sealing rings 3 and a movable sealing ring 4, wherein the movable sealing ring 4 is sleeved on the stirring shaft I1, and the two static sealing rings 3 are respectively arranged at the upper end and the lower end of the movable sealing ring 4 and are respectively connected with the sleeve 8 and the top gland 2.

The two sides of the movable sealing ring 4 are provided with bosses 41, the static sealing ring 3 is provided with a groove 31 matched with the movable sealing ring boss 41, and the position is limited by the matching of the groove 31 and the bosses 41.

In this embodiment, the dynamic seal ring 4 has 4 cutting surfaces uniformly along the outer periphery of the boss 41, and the groove 31 of the static seal ring 3 also has 4 cutting surfaces matched with the groove along the circumference.

The air pipe 20 is provided with an electric pressure gauge 18 and an electromagnetic valve 19 outside the tank body 15. Air pipe 20 connects external air source and gets into air cavity 21, and external air source inserts, is full of pressure air in the air cavity 21, and under compressed air's effect, movable seal ring 4 receives radial thrust, holds (mixing) shaft I1 tightly, and movable seal ring 4 has effectually prevented that particulate matters such as fine sand from getting into bottom self-lubricating bearing, and the effectual particle such as self-lubricating bearing entering fine sand that has prevented leads to quick wearing and tearing. The electric contact pressure gauge 18 and the electromagnetic valve 19 control signals to be accessed to a control system of the anaerobic fermentation tank, and the control system controls to ensure that the air pressure in the air cavity 21 is stabilized within a required range.

The bearing seat 12 is formed by arranging a cylindrical structure at one side in a disc, an outer ring is formed at the periphery of the disc, an inner ring is formed by the cylindrical structure, and the inner ring is matched with the bottom bearing 11 and is connected with the bottom bearing through a locking screw I9. The bearing seat 12 is arranged at the bottom in the tank body 15, the outer ring is welded with the tank body 15, and the bottom bearing 11 is arranged on the inner ring of the bearing seat 12; a drain pipe 16 communicated with the settling cavity 28 is arranged at the bottom of the bearing seat 12, the drain pipe 16 is communicated with the outside of the tank body 15, and a ball valve 17 is arranged on the drain pipe 16 at the outlet of the tank body 15.

And the stirring shaft I1 and the sleeve 8 are fixedly connected through a locking screw II 10 to prevent the shaft sleeve 8 from idling. The shaft sleeve 8 is of a T-shaped sleeve structure, and a shaft shoulder of the shaft sleeve 8 is in end face contact with the bottom bearing 11. The bottom bearing 11 is a self-lubricating bearing, and the self-lubricating bearing is fixed with the inner ring of the bearing seat 12 through a locking screw II 10; the installation precision requirement of the self-lubricating bearing is not high, the fit clearance is allowed, the performance is reliable, and the later maintenance is not needed.

The outer spigot of the sleeve 7 is matched and assembled with the inner spigot of the bearing seat 12 and fastened through a fastening bolt II 13, a settling chamber 28 is formed between the sleeve 7 and the bearing seat 12, a drain pipe 16 is arranged at the bottom of the settling chamber, the drain pipe 16 is communicated with the outside of the tank body 15, a ball valve 17 is arranged at the outlet of the tank body 15, the ball valve 17 is opened and checked periodically, the operation effect of the whole air seal is confirmed through the water quality condition of drainage, and a small amount of fine sand mixed into the settling chamber 28 can be removed. The drain pipe 16 is periodically opened for inspection, and the operation effect of the whole hermetic seal can be confirmed through the condition of water quality in the drain pipeline.

After the stirring shaft I1 and the shaft sleeve 8 are fixed, the stirring shaft I1 is arranged in a bottom self-lubricating bearing, the shaft sleeve 8 is driven by the stirring shaft I1 to rotate in the bottom self-lubricating bearing, the self-lubricating bearing can have a fit clearance, the shaft is allowed to have certain radial run-out, the performance of the self-lubricating bearing is reliable, and later maintenance is not needed.

The connecting flange 24 is closed with the end flange of the II 27 stirring shaft of the anaerobic fermentation tank through a fixing bolt III 26 to form a whole stirring shaft, and the top motor is connected with the II 27 stirring shaft to drive the I1 stirring shaft and the II 27 stirring shaft to integrally rotate.

The fender 23 is a frustum-shaped annular plate and is welded on the stirring shaft I1, and the fender 23 blocks fine sand deposited in liquid at the top, so that the dynamic sealing ring 4 is effectively protected. The baffle plate 22 is an inverted frustum-shaped annular plate, is welded on the top gland 2 and is positioned in the mudguard 23, a conical annular space is formed between the baffle plate 22 and the mudguard 23, and the minimum gap between the baffle plate 22 and the mudguard 23 is 3 mm. The marsh gas bubbles carrying the fine sand to rise impact the mud guard 23 and the baffle plate 22, the marsh gas bubbles are broken, and the fine sand is settled. The baffle plate 22 and the mudguard 23 act together to prevent fine sand particles from entering the movable sealing ring 4 from the gap of the static sealing ring 3, so that the movable sealing ring 4 is damaged to influence the sealing effect.

Example 2: the difference between this example and example 1 is: the minimum clearance between the deflector 22 and the fender 23 in this example is 2 mm. The marsh gas bubbles carrying the fine sand to rise impact the mud guard 23 and the baffle plate 22, the marsh gas bubbles are broken, and the fine sand is settled. The baffle plate 22 and the mudguard 23 act together to prevent fine sand particles from entering the movable sealing ring 4 from the gap of the static sealing ring 3, so that the movable sealing ring 4 is damaged to influence the sealing effect.

Example 3: the difference between this example and example 1 is: in this example the minimum clearance between the deflector 22 and the fender 23 is 4 mm. The marsh gas bubbles carrying the fine sand to rise impact the mud guard 23 and the baffle plate 22, the marsh gas bubbles are broken, and the fine sand is settled. The baffle plate 22 and the mudguard 23 act together to prevent fine sand particles from entering the movable sealing ring 4 from the gap of the static sealing ring 3, so that the movable sealing ring 4 is damaged to influence the sealing effect.

It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.

Claims

1. The utility model provides a high-efficient anaerobic fermentation jar hermetically sealed formula end supports agitating unit which characterized in that: the anaerobic fermentation tank comprises a stirring shaft I arranged in a tank body, a bearing seat, a bottom bearing, a shaft sleeve, a top gland and a pneumatic sealing device, wherein the bearing seat is arranged at the bottom in the tank body, the inner ring of the bearing seat is provided with the bottom bearing, the shaft sleeve arranged at one end of the stirring shaft I is arranged in the bottom bearing, the sleeve is sleeved on the stirring shaft I, one end of the sleeve is connected with the outer ring of the bearing seat, the other end of the sleeve is connected with the top gland sleeved on the stirring shaft I, a sedimentation cavity is formed between the sleeve and the inner ring of the bearing seat, an air cavity is formed between the sleeve and the top gland, the pneumatic sealing device is arranged on the stirring shaft I in the air cavity, two ends of the pneumatic sealing device are respectively connected with the sleeve and the top gland, the top gland is provided with an air inlet and is provided with an air pipe, and a ball valve is arranged at the end part of the drain pipe extending out of the tank body.

2. The high-efficiency anaerobic fermentation tank air-sealing type bottom-supported stirring device as claimed in claim 1, which is characterized in that: the pneumatic sealing device comprises two static sealing rings and a movable sealing ring, the movable sealing ring is sleeved on the stirring shaft I, and the two static sealing rings are respectively arranged at the upper end and the lower end of the movable sealing ring and are respectively connected with the sleeve and the top gland.

3. The high-efficiency anaerobic fermentation tank air-sealing type bottom-supported stirring device as claimed in claim 2, characterized in that: the two sides of the movable sealing ring are provided with bosses, the static sealing ring is provided with a groove matched with the movable sealing ring boss, and the static sealing ring is matched with the bosses for limiting through the groove.

4. The high-efficiency anaerobic fermentation tank air-sealing type bottom-supported stirring device as claimed in claim 3, wherein: the periphery of the boss is provided with a plurality of tangent planes, and the groove of the static sealing ring is also provided with a tangent plane matched with the groove.

5. The high-efficiency anaerobic fermentation tank air-sealing type bottom-supported stirring device as claimed in claim 1, which is characterized in that: the bearing seat is formed by arranging a cylindrical structure at one side in the disc, an outer ring is formed at the periphery of the disc, an inner ring is formed by the cylindrical structure, the inner ring is matched with the bottom bearing, and a drain pipe communicated with the sedimentation cavity is arranged at the bottom of the bearing seat.

6. The high-efficiency anaerobic fermentation tank air-sealing type bottom-supported stirring device as claimed in claim 1, which is characterized in that: the stirring shaft I and the sleeve are fixedly connected through a locking screw I.

7. The high-efficiency anaerobic fermentation tank air-sealing type bottom-supported stirring device as claimed in claim 1, which is characterized in that: the shaft sleeve is of a T-shaped sleeve structure, and a shaft shoulder of the shaft sleeve is in contact with the end face of the bottom bearing.

8. The high-efficiency anaerobic fermentation tank air-sealing type bottom-supported stirring device as claimed in claim 1, which is characterized in that: the bottom bearing is a self-lubricating bearing, and the self-lubricating bearing is fixed with the inner ring of the bearing seat through a locking screw II.

9. The high-efficiency anaerobic fermentation tank air-sealing type bottom-supported stirring device as claimed in claim 1, which is characterized in that: the air pipe is provided with an electric dynamometer and an electromagnetic valve outside the tank body.

10. The high-efficiency anaerobic fermentation tank air-sealing type bottom-supported stirring device as claimed in claim 1, which is characterized in that: a mud guard is welded on the stirring shaft I, and is a frustum-shaped annular plate for blocking fine sand deposited in the liquid at the top; the top gland is welded with a baffle plate, the baffle plate is an inverted frustum-shaped annular plate and is positioned in the mudguard, a conical annular space is formed between the baffle plate and the mudguard, and the minimum gap between the baffle plate and the mudguard is 2-4 mm.