CN205046121U - Anaerobic digestion stirs sealing device - Google Patents

Abstract

The utility model provides a stirring and sealing device for anaerobic digestion, which comprises a rotary sleeve, a fixed sleeve, liquid seal oil, a connecting flange, a fixed flange, a liquid seal oil inlet and a stirring shaft; the lower part of the stirring shaft is from top to bottom. The lower end runs through the bottom plate and the connecting flange of the rotating sleeve in turn, and is fixedly connected with the bottom plate of the rotating sleeve. A U-shaped chamber is formed between the rotating sleeves, and the liquid seal oil is stored in the U-shaped chamber. There is a liquid seal oil diversion groove above the fixed sleeve, and one end of the liquid seal oil diversion groove is connected with the liquid seal oil inlet. The other end communicates with the U-shaped chamber. The device uses liquid seal oil to separate the anaerobic system from the air, effectively realizes the sealing of the anaerobic system, and avoids the mechanical wear caused by the traditional stirring seal. It has a simple structure and is easy to install. It is suitable for any form of anaerobic digestion stirring device The sealing is safe and reliable, and the cost is low.

Description

An anaerobic digestion stirring and sealing device

technical field

The utility model belongs to the technical field of mechanical equipment, in particular to an anaerobic digestion stirring and sealing device, which is used for sealing the stirring device of an anaerobic digestion system.

Background technique

Anaerobic digestion technology, as the mainstream process technology of organic waste recycling, has attracted more and more attention. Anaerobic digestion technology can not only make waste harmless, reduce and stabilize waste, but also make the waste Organic matter is converted into a clean energy substance - methane. In addition, the use of anaerobic digestion technology to treat organic pollutants can also effectively reduce carbon emissions. Therefore, anaerobic digestion technology has broad application prospects.

Anaerobic digestion is a complex biochemical reaction process, in which the main functional bacteria are anaerobic digestion bacteria, which are strictly anaerobic bacteria and cannot survive in an aerobic environment. Therefore, dissolved oxygen, as one of the most important factors affecting anaerobic digestion, should be strictly controlled. In order to ensure that the dissolved oxygen in the anaerobic digestion system is lower than the tolerance threshold of anaerobic digestion bacteria, it is necessary to ensure that the anaerobic system is well airtight, and the connections of mechanical equipment must be sealed.

In order to ensure the treatment effect of anaerobic digestion, a stirring device is often installed in the anaerobic digestion system. Commonly used stirring devices include: mechanical stirring, hydraulic stirring and biogas stirring. Among them, mechanical stirring has a wide range of applications due to its good stirring performance, easy control, and convenient operation and maintenance. However, during the mechanical stirring process, mechanical wear is easily caused between the stirring shaft and the anaerobic digestion tank, which affects the stability and service life of the mixer. At the same time, air will enter the anaerobic digestion tank through the wear gap, causing biogas leakage and anaerobic system collapse.

Utility model content

The purpose of the utility model is to overcome the problem that the existing anaerobic digestion tank and the stirring shaft are easily caused by mechanical wear and air enters, leading to the collapse of the anaerobic system.

For this reason, the utility model provides a kind of anaerobic digestion stirring and sealing device, comprises rotating sleeve box, fixed sleeve box, liquid seal oil, connecting flange, fixed flange, liquid seal oil adding port and stirring shaft; The lower part of the shaft runs through the bottom plate and the connecting flange of the rotating box from top to bottom, and is fixedly connected with the bottom plate of the rotating box as a whole. The stirring shaft drives the rotating box to rotate together. The upper part of the stirring shaft passes through the fixed flange and the fixed sleeve The upper end of the box is connected, the lower end of the fixed sleeve box is fixedly connected with the connecting flange, a U-shaped chamber is formed between the fixed sleeve box and the rotating sleeve box, and the liquid seal oil is stored in the U-shaped chamber. An oil seal diversion groove, one end of the liquid seal oil diversion groove communicates with the liquid seal oil addition port, and the other end communicates with the U-shaped chamber.

Further, a differential pressure level gauge is installed at the liquid level of the liquid seal oil in the U-shaped chamber, which is used to detect the change of the liquid seal oil level, so as to replenish the liquid seal oil in time.

Further, a pressure monitor is installed inside the fixed sleeve for monitoring the pressure of the anaerobic digestion tank to ensure safe operation.

Further, there is a distance between the stirring shaft and the connecting flange and the fixing flange, so as to avoid the problem of mechanical wear.

Further, the sealing oil inlet is provided with a sealing cover, which can effectively prevent the volatilization loss of the hydraulic oil.

This anaerobic digestion stirring and sealing device of the utility model is all made of stainless steel, which is convenient for welding.

Compared with the prior art, the utility model has the beneficial effects:

(1) The anaerobic digestion stirring sealing device provided by the utility model welds the rotating sleeve and the stirring shaft together, rotates together with the stirring shaft, and uses liquid seal oil to separate the anaerobic system from the air, effectively realizing the anaerobic digestion. Oxygen system sealing, while avoiding the mechanical wear caused by traditional solid material sealing.

(2) The anaerobic digestion stirring sealing device provided by the utility model is equipped with a differential pressure level gauge and a pressure monitor to monitor the liquid seal oil level and the pressure change in the device in real time, so as to ensure the sealing effect and safe operation of the device.

(3) The anaerobic digestion stirring sealing device provided by the utility model has a simple structure and is easy to install, and is suitable for sealing any form of anaerobic digestion stirring device, and is safe, reliable and low in cost.

The utility model will be described in further detail below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a structural schematic diagram of the anaerobic digestion stirring and sealing device of the utility model.

Explanation of Reference Signs: 1. Rotating sleeve; 2. Fixed sleeve; 3. Liquid seal oil; 4. Pressure differential level gauge; 5. Connecting flange; 6. Pressure monitor; 7. Fixed flange; 8 , Liquid seal oil inlet; 9, Stirring shaft; 10, Liquid seal oil diversion groove.

detailed description

Example 1:

In order to overcome the problem that the mechanical wear between the existing anaerobic digestion tank and the stirring shaft is easy to cause air to enter, resulting in the collapse of the anaerobic system, this embodiment provides a sealing device for anaerobic digestion as shown in Figure 1, Including rotating sleeve 1, fixed sleeve 2, liquid seal oil 3, connecting flange 5, fixed flange 7, liquid seal oil inlet 8 and stirring shaft 9; the lower part of the stirring shaft 9 runs through and rotates sequentially from top to bottom The bottom plate of the sleeve 1 and the connecting flange 5 are fixedly connected to the bottom plate of the rotating sleeve 1, the upper part of the stirring shaft 9 is connected to the upper end of the fixed sleeve 2 through the fixed flange 7, and the lower end of the fixed sleeve 2 is connected to the connecting flange 5 Fixed connection, a U-shaped chamber is formed between the fixed sleeve 2 and the rotating sleeve 1, and the liquid seal oil 3 is stored in the U-shaped chamber, and a liquid seal oil diversion groove 10 is arranged above the fixed sleeve 2, so that One end of the liquid seal oil diversion groove 10 communicates with the liquid seal oil addition port 8, and the other end communicates with the U-shaped chamber.

The anaerobic digestion stirring and sealing device of the utility model is made of stainless steel, which is convenient for welding, has good corrosion resistance, high mechanical strength and long service life.

The assembly and working process of the anaerobic digestion stirring and sealing device: firstly, the rotating casing 1 and the stirring shaft 9 are welded together, and when the stirring shaft 9 rotates, the rotating casing 1 is driven to rotate together; After the motor is connected through the coupling, the whole set of agitator is fixed on the fixed sleeve box 2 through the fixed flange 7, and the fixed sleeve box 2 and the flange 5 are welded together. fixed together on the anaerobic digester. The liquid seal oil addition port 8 is connected to the liquid seal oil diversion groove 10 above the fixed sleeve box 2, the liquid seal oil 3 is injected through the liquid seal oil addition port 8, and flows into the fixed sleeve box 2 and the rotary sleeve through the liquid seal oil diversion groove 10 A U-shaped chamber is formed between the boxes 1 to ensure that when the rotating sleeve 1 rotates with the stirring shaft 9, the liquid seal oil 3 does not overflow into the U-shaped chamber, and the liquid seal oil 3 forms a liquid seal to isolate the air from the anaerobic digestion tank.

The anaerobic digestion stirring sealing device provided by the utility model welds the rotating sleeve and the stirring shaft together, rotates together with the stirring shaft, and uses liquid seal oil to separate the anaerobic system from the air, effectively realizing the anaerobic system. seal.

Example 2:

On the basis of Example 1, a differential pressure level gauge 4 is installed at the liquid level of the liquid seal oil 3 in the U-shaped chamber to detect the change of the liquid level of the liquid seal oil 3 in the U-shaped chamber, and when the differential pressure liquid When the level meter 4 detects that the liquid level of the liquid seal oil 3 is lowered, on the one hand, the reason may be that the liquid seal oil 3 is volatilized and consumed, and at this time, the liquid seal oil 3 must be injected into it through the liquid seal oil addition port 8; on the other hand, it may be The pressure in the anaerobic digestion tank is too high. Therefore, a pressure monitor 6 is installed inside the fixed sleeve box 2. The monitoring value of the pressure monitor 6 can be used to determine the reason for the drop in the liquid level of the liquid seal oil 3. Whether it is necessary to add a liquid seal Oil 3, when the generated biogas is not discharged in time and the pressure in the anaerobic digestion tank is too high, the pressure monitor 6 will show that it exceeds the threshold, and at the same time, the differential pressure level gauge 4 will show that the liquid level drops rapidly. The pressure inside the tank can effectively prevent the explosion of the anaerobic digestion tank due to excessive pressure. 6. If the monitoring value is normal, but the differential pressure level gauge 4 detects that the liquid level has dropped, it indicates that the liquid seal oil 3 is insufficient, and it can be added in time through the liquid seal oil addition port 8.

In addition, there is a distance between the stirring shaft 9 and the connecting flange 5 and the fixing flange 7, and the stirring shaft 9 does not contact the inner section of the connecting flange 5 and the fixing flange 7, so that the stirring shaft 9 is effectively avoided. The mechanical wear between the connecting flange 5 and the fixing flange 7 prolongs the service life of the anaerobic digestion stirring sealing device.

The liquid seal oil inlet 8 is provided with a seal cover, which can effectively prevent the volatilization loss of the liquid seal oil 3, and the replacement cycle of the liquid seal oil 3 is longer, and does not need to be replaced frequently, reducing the cost.

In summary, the anaerobic digestion stirring and sealing device provided by the utility model can not only effectively solve the mechanical wear problem during the operation of the anaerobic mixer, but also can display the pressure change in the reaction tank through the differential pressure level gauge. Strength, together with the pressure monitor, plays a dual role in guaranteeing the safe operation of the anaerobic digestion tank.

The above examples are only illustrations of the present utility model, and do not constitute a limitation to the protection scope of the present utility model. All designs identical or similar to the present utility model belong to the protection scope of the present invention.

Claims (5)

1. a tightness system is stirred in anaerobic digestion, it is characterized in that: comprise rotary sleeve box (1), permanent sleeve box (2), fluid-tight oil (3), joint flange (5), mounting flange (7), fluid-tight oil interpolation mouth (8) and stir shaft (9), described stir shaft (9) bottom runs through base plate and the joint flange (5) of rotary sleeve box (1) from top to bottom successively, and be fixedly connected with rotary sleeve box (1) base plate, described stir shaft (9) top is connected with permanent sleeve box (2) upper end by mounting flange (7), permanent sleeve box (2) lower end is fixedly connected with joint flange (5), U-shaped chamber is formed between permanent sleeve box (2) and rotary sleeve box (1), fluid-tight oil (3) is stored in this U-shaped chamber, described permanent sleeve box (2) top is provided with fluid-tight oil diversion trench (10), described fluid-tight oil diversion trench (10) one end is added mouth (8) with fluid-tight oil and is communicated with, the other end is communicated with U-shaped chamber.

2. tightness system is stirred in anaerobic digestion as claimed in claim 1, it is characterized in that: fluid-tight oil (3) the liquid level place of described U-shaped chamber is provided with pressure reduction liquidometer (4).

3. tightness system is stirred in anaerobic digestion as claimed in claim 1 or 2, it is characterized in that: described permanent sleeve box (2) inside is provided with pressure monitoring meter (6).

4. tightness system is stirred in anaerobic digestion as claimed in claim 1, it is characterized in that: described stir shaft (9) and be equipped with spacing between joint flange (5) and mounting flange (7).

5. tightness system is stirred in anaerobic digestion as claimed in claim 1, it is characterized in that: described fluid-tight oil adds mouth (8) and is provided with sealing cover.