CN103243018A - Gas-liquid mixture conveying pump for biological fermentation tanks - Google Patents

Abstract

The invention discloses a gas-liquid mixed delivery pump for a biological fermentation tank, which comprises a motor (1), a base (4), a mechanical seal seat (6), a liquid inlet pipe (11), and a fermentation tank body (18) , air inlet pipe (19), gland (22), gas-liquid mixing impeller (25), bracket (26); it is characterized in that: the base (4) is set at the bottom of the fermenter tank (18), mechanically sealed The seat (6) is installed in the base (4), the bracket (26) is installed in the mechanical seal seat (6), the main shaft (27) passes through the middle of the bracket (26), and the gas-liquid mixed impeller (25 ) is sleeved on the main shaft (27), and the liquid inlet pipe (10), air inlet pipe (19) communicates with the mixing chamber (14). The technical solution of the present invention can bring the following beneficial effects: simple structure, small volume, safe and reliable, convenient installation, use and maintenance, and the manufacturing cost is much lower than the traditional mechanical stirring and air compressor air supply system.

Description

A gas-liquid mixed delivery pump for a biological fermentation tank

technical field

The invention relates to a gas-liquid mixed delivery pump, in particular to a gas-liquid mixed delivery pump used in an energy-saving fermenter for large-scale production of various microbial preparations.

Background technique

The microbial preparations in the present invention refer to microbial preparations used in biological feed, biological fertilizers, biological pesticides, biological energy, garbage disposal, environmental governance, etc., including probiotics, EM bacteria, enzyme preparations, etc.

Vigorously developing biotechnology and using various beneficial microbial preparations to produce biological feed, biological fertilizers, biological pesticides, and waste disposal are important measures to improve the agricultural ecological environment, ensure sustainable agricultural development, and ensure food safety. Fermentation tanks are important equipment for the production of various microbial preparations. As the demand for various microbial preparations increases, so does the demand for fermenters.

At present, the fermentation tanks widely used in our country are traditional mechanical stirring tanks. This fermenter is mainly composed of a mechanical stirring system and an air handling system supplied by an air compressor. The function of the mechanical agitation is to break the air that the air handling system passes into the fermentation broth. Increase the contact area between the bubbles and the fermentation broth, increase the dissolved oxygen in the fermentation broth, and ensure that microorganisms can multiply rapidly in the fermentation broth. In order to crush the air bubbles, the mechanically agitated paddle must stir the fermented liquid quickly, so that the air entering the fermented liquid is crushed during the shearing and collision process, so the energy consumption of the stirring system is very high. The compressed air pressure generated by the air compressor in the air system needs to overcome the air resistance of the air sterilization and filtration system, the head pressure in the fermentation tank and the loss of the pipeline. Therefore, the energy consumption of the air compressor is greater than that of the mechanical stirring system. The fermentation industry has also been identified as a high energy-consuming enterprise.

For a long time, people have tried to reduce the energy consumption of the fermenter. The first method is to improve the geometry of the stirring paddle in order to reduce the consumption of stirring power. "201120132517.8", named "Stirring Paddle for Fermentation Tank", although it has certain effects, it is not significant; the second method is to remove the mechanical stirring system, use compressed air to generate jets to collide with the fermentation liquid to break the bubbles, and develop various Air-lift fermenter, for example, the patent application number is "201110143108.2", the name is "a swirling air-lift fermenter", the patent number is "201220213280.0", the name is "air-lift fermenter", the patent number is "201220249741 .X", the name is "air-lift fermenter"; although this type of fermenter saves the energy consumption of mechanical stirring, it increases the energy consumption of the air compressor, and its energy-saving effect is not ideal, and it will also produce fermentation Because of problems such as uneven liquid up and down, it is only used in a few small fermenters and has not been popularized in large quantities. Therefore, so far, the traditional mechanical stirring fermenter is still the first choice for the fermentation industry.

Due to the high production cost and high energy consumption of traditional mechanical agitation fermenters, this will obviously have a very adverse impact on the popularization and application of agricultural biotechnology. Therefore, it is urgent to develop a novel fermenter with simple structure and good energy-saving effect.

Contents of the invention

In order to solve the technical problem of high energy consumption of traditional fermentation tanks in the prior art, this invention proposes a high-efficiency gas-liquid mixed pump with simple structure and small footprint, which is installed in the fermentation tank, and its purpose is to replace the traditional The traditional mechanical stirring paddle and air compressor used in the fermentation tank cancel the high energy consumption of the traditional mechanical stirring and air compressor, and directly mix the fermentation liquid with clean air under negative pressure conditions, thereby improving the efficiency of the fermentation tank and greatly reducing the fermentation time. energy consumption of the tank.

A gas-liquid mixed delivery pump for a biological fermentation tank. The gas-liquid mixed delivery pump is installed at the bottom of the fermentation tank, which includes a motor 1, a base 4, a mechanical seal seat 6, a liquid inlet pipe 11, a fermentation tank body 18, an inlet Trachea 19, gland 22, gas-liquid mixing impeller 25 and support 26 placed in the fermentation tank; the base 4 is arranged at the bottom of the fermentation tank body 18, and the mechanical seal seat 6 is installed in the base 4, and the support 26 Installed in the mechanical seal seat 6, the main shaft 27 is installed in the middle of the bracket 26, the gas-liquid mixing impeller 25 is sleeved on the main shaft 27, and the liquid inlet pipe 10 and the air inlet pipe 19 communicate with the mixing chamber 14.

The outer ring of the gas-liquid mixing impeller 25 is provided with a pressurization chamber 16, the outer ring of the pressurization chamber 16 is provided with a refinement chamber 15, and the outer ring of the refinement chamber is provided with a mixing chamber 14.

The inlet pipe 10 is connected with the inlet straight pipe 8 through the inlet elbow 9 , and the inlet straight pipe 8 is fixed on the bracket 26 and connected with the through hole 11 .

The liquid inlet pipe 10 is connected with the inlet straight pipe 8 through the inlet elbow 9 , and the inlet straight pipe 8 is fixed on the bracket 26 and connected with the mechanical seal chamber 12 .

The liquid inlet pipe 10 is provided with through holes 11, and at least two of the through holes 11 are provided.

Cover plates 22 are provided on the mixing chamber 14 , refinement chamber 15 and booster chamber 16 . One end of the inlet pipe 19 is connected to the cover plate 22 and communicates with the gas-liquid mixing impeller 25 .

When the pump works, the gas-liquid mixing impeller 25 rotates, and the fermentation liquid is sucked from the lower inlet of the gas-liquid mixing impeller 25, and the clean air is sucked from the outside of the fermenter through the pipeline from the upper inlet of the gas-liquid mixing impeller 25, and the suctioned fermentation liquid and The air is discharged at high speed from the outlet of the gas-liquid mixing impeller 25, enters the booster chamber 16 to increase the pressure, and then flows into the refinement chamber 15 to break up large air bubbles and form fine air bubbles, and then transfers to the gas-liquid mixing chamber 14 after the gas-liquid is fully mixed The jet stream contains a large number of fine bubbles. During the spraying process, the slurry in the fermenter is fully stirred, and a large number of fine air bubbles rub against the slurry to release oxygen, which increases the oxygen content in the fermentation liquid and enhances the efficacy of the fermenter. .

The technical solution of the present invention can bring the following beneficial effects: simple structure, small volume, safe and reliable, convenient installation, use and maintenance, and the manufacturing cost is much lower than the traditional mechanical stirring and air compressor air supply system. The efficiency is high, the energy consumption is lower than that of the traditional mechanical stirring system, which greatly saves energy. The production test of the 500L fermentation tank proves that the energy consumption of the fermentation tank of the present invention is more than 30% lower than that of the traditional mechanical mixing tank.

Description of drawings

Fig. 1 is a structural schematic diagram of a gas-liquid mixed delivery pump for a biological fermentation tank of the present invention.

In Figure 1, 1 is the motor, 2 is the motor seat, 3 is the A screw, 4 is the base, 5 is the A gasket, 6 is the mechanical seal seat, 7 is the A seal ring, 8 is the inlet straight pipe, and 9 is the inlet elbow , 10 is the liquid inlet pipe, 11 is the through hole, 12 is the mechanical seal chamber, 13 is the mechanical seal, 14 is the mixing chamber, 15 is the refinement chamber, 16 is the pressurization chamber, 17 is A bolt, 18 is the fermentation tank Body, 19 is intake pipe, 20 is B screw, 21 is B gasket, 22 is gland, 23 is impeller nut, 24 is key, 25 is gas-liquid mixing impeller, 26 is bracket, 27 is main shaft, 28 is B sealing ring, 29, B screw, 30, transmission sleeve, 31, locking screw, 32, motor shaft extension, 33, B bolt.

Detailed ways

A specific embodiment of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, the base 4 of the gas-liquid mixed pump is welded on the bottom of the fermenter tank body 18, the main shaft 27 of the gas-liquid mixed pump passes through the mechanical seal seat 6, and the mechanical seal 13 is sleeved on the main shaft 27 and installed on the In the mechanical seal seat 6, the mechanical seal seat 6 is installed in the base 4, fixed by the A screw 3, the mechanical seal seat 6 and the base 4 are sealed by the A gasket 4, the motor seat 2 is installed on the base 4, and the motor 1 is installed On the motor base 2 , B bolts 33 pass through the motor 1 and the motor base 2 to fix the motor 1 and the motor base 2 on the base 4 .

The motor shaft extension 32 on the motor 1 is enclosed within the transmission sleeve 30, and the transmission sleeve 30 and the motor shaft extension 32 are fixed with locking screws 31, and the transmission sleeve 30 drives the main shaft 27 to rotate.

The inlet straight pipe 8 is welded on the bracket 26, the bracket 26 is installed on the mechanical seal seat 6, and fixed by the B screw 29, the bracket 26 and the mechanical seal seat 6 are sealed with the A sealing ring 7 and the B sealing ring 28, and the gas-liquid The mixed input impeller 25 is set on the main shaft 27, the key 24 is passed between the gas-liquid mixed input impeller 25 and the main shaft 27 to fix it circumferentially, and the impeller nut 23 is screwed on the main shaft 27 to press the gas-liquid mixed input impeller 25 to fix it axially , the pressurization chamber 16, the refinement chamber 15 and the mixing chamber 14 are installed on the support 26 respectively, and the gland 22 is pressed on the pressurization chamber 16, the refinement chamber 15 and the mixing chamber,

The A bolt 17 passes through the gland 22 and the refinement chamber 15 and is screwed on the bracket 26, and the gland 22, the pressurization chamber 16, the refinement chamber 15, the mixing chamber 14 and the bracket 26 are fixed together, and the air intake pipe 19 passes through the B screw 20 is fixed on the gland 22, the air inlet pipe 19 and the gland 22 are sealed with a B gasket 21, the inlet elbow 9 is screwed on the inlet straight pipe 8, the inlet pipe 10 is screwed on the inlet elbow 9, and the inlet pipe A plurality of through holes 11 are arranged on 10 . So far, the complete gas-liquid mixed pump has been assembled.

When working, the motor 1 rotates, the motor shaft extension 32 drives the transmission sleeve 30 to rotate, the transmission sleeve 30 drives the main shaft 27 to rotate, and the main shaft 27 drives the gas-liquid mixing impeller 25 to rotate synchronously. During the rotation of the gas-liquid mixing impeller 25, the gas The lower inlet of the liquid mixing impeller 25 sucks the fermentation liquid from the fermenter body 18 through the mechanical seal chamber 12, the inlet elbow 9 and the liquid inlet pipe 10, and a plurality of through holes 11 are arranged on the liquid inlet pipe 10, which can suck in the fermentation liquid. The gas-containing fermentation liquid in the tank body 18 improves the fermentation quality, and the upper inlet of the gas-liquid mixed impeller 25 sucks clean air from the outside of the fermenter through the air inlet pipe 19, and the sucked fermented liquid and air pass through the outlet of the gas-liquid mixed impeller 25 at a high speed. Discharge, enter the booster chamber 16 to increase the pressure of the fluid, and then flow into the refinement chamber 15 to break the large air bubbles to form fine air bubbles, and then transfer to the gas and liquid. After the gas and liquid are fully mixed in the mixing chamber 14, they are sprayed out and enter the fermentation tank. In the body 18, a uniform annular jet flow is formed in the fermenter. The jet contains a large number of fine bubbles. During the jet injection process, the slurry in the fermenter is fully stirred, and a large number of air fine bubbles rub against the slurry to release oxygen and improve the fermentation liquid. The oxygen content in the tank enhances the efficiency of the fermenter.

Claims (8)

1. A gas-liquid mixed delivery pump for a biological fermentation tank, which includes a motor (1), a base (4), a mechanical seal seat (6), a liquid inlet pipe (11), a fermentation tank body (18), an inlet Trachea (19), gland (22), gas-liquid mixing impeller (25), bracket (26); it is characterized in that: the base (4) is set at the bottom of the fermenter tank (18), and the mechanical seal seat ( 6) Installed in the base (4), the bracket (26) is installed in the mechanical seal seat (6), the main shaft (27) is installed in the middle of the bracket (26), and the gas-liquid mixed impeller (25) is set Set on the main shaft (27), the liquid inlet pipe (10), the air inlet pipe (19) communicate with the mixing chamber (14). 2. A gas-liquid mixed transport pump for biological fermentation tanks according to claim 1, characterized in that: the outer ring of the gas-liquid mixed transport impeller (25) is provided with a booster chamber (16), The outer ring of the pressure chamber (16) is provided with a refinement chamber (15), and the outer ring of the refinement chamber is provided with a mixing chamber (14). 3. A gas-liquid mixed delivery pump for biological fermentation tanks according to claim 1, characterized in that: the liquid inlet pipe (10) is connected to the inlet straight pipe (8) through the inlet elbow (9), The inlet straight pipe (8) is fixed on the support (26) and connected with the through hole (11). 4. A gas-liquid mixed delivery pump for biological fermentation tanks according to claim 1, characterized in that: the liquid inlet pipe (10) is connected to the inlet straight pipe (8) through the inlet elbow (9), The inlet straight pipe (8) is fixed on the bracket (26) and connected with the mechanical seal chamber (12). 5 . The gas-liquid mixed delivery pump for biological fermenter according to claim 1 , characterized in that: the liquid inlet pipe ( 10 ) is provided with a through hole ( 11 ). 6. The gas-liquid mixed transport pump for biological fermenter according to claim 5, characterized in that: there are at least two through holes (11). 7. A gas-liquid mixed delivery pump for biological fermenter according to claim 1, characterized in that: the mixing chamber (14), refinement chamber (15) and pressurization chamber (16) are equipped with cover plate (22). 8. A gas-liquid mixed transport pump for biological fermentation tanks according to claim 7, characterized in that: one end of the inlet pipe (19) is connected to the cover plate (22), and is connected to the gas-liquid mixed transport impeller (25) CONNECTED.

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