CN218089527U

CN218089527U - Citric acid production is with hindering ferment system

Info

Publication number: CN218089527U
Application number: CN202220747955.3U
Authority: CN
Inventors: 孟光兵; 赵俊锋; 杜胜伟; 时振
Original assignee: Laiwu Taihe Biochemistry Co ltd
Current assignee: Laiwu Taihe Biochemistry Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-12-20
Anticipated expiration: 2032-04-02

Abstract

The utility model relates to a citric acid production is with hindering ferment system, include with the steam conduit of heat exchanger sugar liquid export intercommunication to and be located the temperature sensor of heat transfer gas sugar liquid import. The utility model discloses let in steam in the heat exchanger from heat exchanger sugar liquid export to make steam leave the heat exchanger from heat exchanger sugar liquid import, thereby make the temperature of steam destroy the growth environment of bacterium, through temperature sensor's setting, guarantee that just gas when leaving the heat exchanger, the temperature is still greater than the temperature of bacterium growth environment, through steam conduit and temperature sensor's setting, guarantee to carry out the abundant heating to the heat exchanger, thereby destroy the growth environment who destroys the bacterium, prevent that the sugar liquid fermentation in the heat exchanger is rotten; through the arrangement of the gas-liquid separator and the heat preservation tank, the water in the steam is convenient to provide heat for the heat preservation tank, and therefore the heat preservation effect of the heat preservation tank is guaranteed.

Description

Citric acid production is with hindering ferment system

Technical Field

The utility model relates to the field of machinary, especially, relate to mechanical parts technical field, specifically indicate a citric acid production is with hindering system of fermenting.

Background

Microbial fermentation is adopted in the industrial production of citric acid, and only a few kinds of aspergillus and yeast are valuable, wherein aspergillus niger is an industrially competitive strain, and candida lipolytica, mancozeb red yeast and the like are highly competitive in yeast.

Aspergillus niger is cultured on agar, a limited colony is formed on the agar, and the colony becomes rich and dense spore peduncle after being cultured for 10 to 14 days at room temperature, and the colony is black and sometimes dark brown black. Considering that the citric acid producing bacteria have the characteristics of strong acid production capacity and high citric acid concentration resistance, the aspergillus niger can be separated by adopting an acid filter paper method, a color changing ring method and a monospore transplanting method so as to avoid the interference of other mixed bacteria and enable the aspergillus niger to become the aspergillus niger for producing citric acid.

Culture of Yeast there are 2 species of yeasts that can be used for citric acid production, candida lipolytica and Candida guilliermondii. The former has a strong ability to decompose fats, and the preferred carbon source is n-alkane. The latter can be used for producing citric acid by alkane fermentation or sugar fermentation, and the pH value of yeast fermentation is 3.5 to 4.0.

In the citric acid fermentation production process, a heat exchanger is often used and is used discontinuously, for example, the liquefied sugar liquid is cooled to about 90 ℃ by the heat exchanger, the liquefied sugar liquid is fed into a fermentation tank after being cooled to 65 ℃, then saccharifying enzyme is added to enter the next fermentation process, and the heat exchanger is required to cool the sugar liquid in the process. However, after the temperature is reduced, a small amount of sugar solution remains in the plate after the plate is replaced, the time is short, the influence is small, particularly in summer, the sugar solution is fermented and acidified, the pH value is reduced after the time is long, and when the sugar solution is added again, the acid production rate and the period of later-stage fermentation are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a citric acid production is with hindering system of fermenting to prior art's not enough, can effectually destroy the growing environment of bacterium, prevents that the interior liquid glucose fermentation of heat exchanger is rotten.

The utility model discloses a through following technical scheme realization, a citric acid production is with hindering fermentation system, include the steam conduit who exports the intercommunication with heat exchanger sugar liquid to and be located the temperature sensor of heat transfer gas sugar liquid import.

The utility model discloses when using, let in steam in the heat exchanger from the export of heat exchanger sugar liquid, and make steam leave the heat exchanger from the import of heat exchanger sugar liquid, thereby make the temperature of steam destroy the growing environment of bacterium, through temperature sensor's setting, guarantee just gas when leaving the heat exchanger, the temperature still is greater than the temperature of bacterium growing environment, through steam conduit and temperature sensor's setting, guarantee to carry out abundant heating to the heat exchanger, thereby destroy the growing environment who destroys the bacterium, prevent sugar liquid fermentation rotten in the heat exchanger.

Preferably, a sugar liquid tank for containing sugar liquid is positioned below a sugar liquid inlet of the heat exchanger, the sugar liquid tank is communicated with the sugar liquid inlet through a first pipeline, and a sugar liquid pump is further arranged on the first pipeline.

When the optimal method scheme is used, in order to reduce sugar liquid in the heat exchanger and the first pipeline as much as possible, before steam is introduced, air is firstly blown from a sugar liquid outlet of the heat exchanger, so that the residual quantity of the sugar liquid is reduced as much as possible, and at the moment, when the sugar liquid tank is positioned below the sugar liquid inlet of the heat exchanger, the sugar liquid can conveniently flow into the sugar liquid tank along the first pipeline.

Preferably, the first pipeline is also provided with a second tee joint, a first connector of the second tee joint is communicated with a liquid inlet of a steam boiler, and a gas outlet of the steam boiler is communicated with the steam pipeline.

The arrangement of the preferred scheme recovers the steam, heats the steam again and reduces the energy consumption.

Preferably, the system also comprises a gas-liquid separator communicated with the first interface, a liquid outlet of the gas-liquid separator is communicated with a liquid inlet of the heat preservation tank, a liquid outlet of the heat preservation tank is communicated with a liquid inlet of the steam boiler, and a gas outlet of the gas-liquid separator is communicated with a gas inlet of the steam boiler through a second pipeline.

This preferred scheme is through the setting of vapour and liquid separator and holding tank, is convenient for provide the heat for the holding tank with the water in the steam to guarantee the heat preservation effect of holding tank.

Preferably, the heat preservation tank comprises an outer shell, an inner shell and a heat preservation cavity located between the outer shell and the inner shell, a liquid inlet and a liquid outlet of the heat preservation tank are communicated with the heat preservation cavity, a third pipeline is further communicated with the liquid inlet of the heat preservation tank, a heating solenoid which extends in a spiral mode along the coaxial line of the inner shell is further arranged in the heat preservation cavity, a gas outlet of the heating solenoid is communicated with the gas-liquid separator, a third tee joint is arranged on the second pipeline, and the third tee joint is communicated with a gas inlet of the heating solenoid.

This preferred scheme is when using, when the heat preservation water temperature in the holding tank is low, lets in steam in the holding tank, carries out abundant heat transfer with the holding tank to guarantee the temperature of holding tank, the steam through the heat transfer simultaneously returns the vapour and liquid separator once more and separates, thereby makes steam circulate once more, makes the abundant heat transfer of steam.

The beneficial effects of the utility model are that: the method comprises the following steps of introducing steam into a heat exchanger from a sugar liquid outlet of the heat exchanger, enabling the steam to leave the heat exchanger from a sugar liquid inlet of the heat exchanger, so that the temperature of the steam destroys the growth environment of bacteria, ensuring that the temperature of positive gas is still higher than the temperature of the growth environment of the bacteria when the positive gas leaves the heat exchanger through the arrangement of a temperature sensor, and ensuring that the heat exchanger is fully heated through the arrangement of a steam pipeline and the temperature sensor, so that the growth environment destroying the bacteria is destroyed, and the sugar liquid in the heat exchanger is prevented from fermenting and deteriorating; through the arrangement of the gas-liquid separator and the heat preservation tank, the water in the steam is convenient to provide heat for the heat preservation tank, so that the heat preservation effect of the heat preservation tank is ensured; when the temperature of the heat preservation water in the heat preservation tank is low, steam is introduced into the heat preservation tank and performs sufficient heat exchange with the heat preservation tank, so that the temperature of the heat preservation tank is guaranteed, and the steam subjected to heat exchange returns to the gas-liquid separator again for separation, so that the steam circulates again, and the steam is subjected to sufficient heat exchange.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic perspective view of a portion of a holding tank;

shown in the figure:

1. a first pipeline 2, a second pipeline 3, a heat exchanger 4, a temperature sensor 5, a sugar liquid tank 6, a sugar liquid pump 7, a gas-liquid separator 8 and a heat preservation tank, 9, a steam boiler 10, a heating spiral pipe 11, a first tee joint 12, a second tee joint 13, a steam pipeline 14, a fourth tee joint 15 and a fifth tee joint.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

Referring to the attached drawings 1-2, the utility model relates to a citric acid production is with hindering fermentation system, including steam boiler 9, steam boiler 9's gas outlet intercommunication has the steam conduit, and the liquid sugar export of heat exchanger 3 is equipped with first tee bend 11, all is equipped with the valve on the three opening of first tee bend 11, and the steam conduit communicates with first tee bend 11, the temperature sensor 4 of heat transfer gas liquid sugar import.

A sugar liquid jar 5 for holding the sugar liquid is located the below of heat exchanger sugar liquid import, and sugar liquid jar 5 still is equipped with sugar liquid pump 6 through first pipeline 1 and sugar liquid import intercommunication on the first pipeline 1.

The first pipeline 1 is also provided with a second tee joint 12 and a fourth tee joint which are positioned above the sugar solution pump 6, the fourth tee joint is positioned above the second tee joint 12, a first interface of the second tee joint 12 is communicated with a gas-liquid separator 7, a liquid outlet of the gas-liquid separator 7 is communicated with a liquid inlet of the heat-insulating tank 8 through a third pipeline, and a gas outlet of the gas-liquid separator 7 is communicated with a gas inlet of the steam boiler 9 through the second pipeline 2.

The heat preservation tank 8 comprises an outer shell, an inner shell and a heat preservation cavity between the outer shell and the inner shell, wherein a liquid inlet and a liquid outlet of the heat preservation tank 8 are communicated with the heat preservation cavity, the liquid outlet of the heat preservation tank 8 is communicated with a liquid inlet of the steam boiler 9, a heating solenoid 10 which extends in a spiral mode along the axis of the inner shell is further arranged in the heat preservation cavity, a gas outlet of the heating solenoid 10 is connected with a fourth tee joint, a third tee joint is arranged on the second pipeline 2, and the third tee joint is communicated with a gas inlet of the heating solenoid 10.

The third pipeline is also provided with a fifth tee 15, and a heat exchange water outlet of the heat exchanger 3 is communicated with the fifth tee 15.

And valves are arranged on openings of the first tee joint 11, the second tee joint 12, the third tee joint and the fourth tee joint.

In particular, as shown in fig. 1, the thick line segments represent the flow path of water and the thin line segments represent the flow path of steam.

When the utility model is used, firstly, in order to reduce the sugar liquid in the heat exchanger 3 and the first pipeline 1 as much as possible, before the steam is introduced, the air is blown from the sugar liquid outlet of the heat exchanger 3, so that the residual amount of the sugar liquid is reduced as much as possible, and at the moment, when the sugar liquid tank 5 is positioned below the sugar liquid inlet of the heat exchanger, the sugar liquid can conveniently flow into the sugar liquid tank 5 along the first pipeline 1;

then, steam is led into the heat exchanger 3 from a sugar liquid outlet of the heat exchanger 3, and the steam leaves the heat exchanger 3 from a sugar liquid inlet of the heat exchanger 3, so that the temperature of the steam destroys the growth environment of bacteria, the temperature of the positive gas is guaranteed to be still higher than that of the growth environment of the bacteria when the positive gas leaves the heat exchanger 3 through the arrangement of the temperature sensor 4, the heat exchanger 3 is guaranteed to be fully heated through the arrangement of the steam pipeline and the temperature sensor 4, the growth environment which destroys the bacteria is destroyed, and the sugar liquid in the heat exchanger 3 is prevented from fermenting and deteriorating;

the steam after heat exchange enters a gas-liquid separator 7 through a second tee joint 12 for gas-liquid separation, liquid enters a heat preservation cavity through a third pipeline, and heat preservation water in the heat preservation cavity finally enters a steam boiler 9;

steam in the gas-liquid separator 7 can enter the steam boiler 9 through the second pipeline 2 in a diameter mode, and can enter the spiral heating pipe to exchange heat with heat preservation water, and the steam after heat exchange returns to the gas-liquid separator 7 again to be subjected to gas-liquid separation, so that the steam can be recycled.

Of course, the above description is not limited to the above examples, and the technical features of the present invention that are not described in the present application can be implemented by or using the prior art, which is not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.

Claims

1. A citric acid production is with hindering fermentation system which characterized in that: comprises a steam pipeline (13) communicated with a sugar liquid outlet of a heat exchanger (3) and a temperature sensor (4) positioned at a heat exchange gas sugar liquid inlet; the device also comprises a gas-liquid separator (7) communicated with the first interface, wherein a liquid outlet of the gas-liquid separator (7) is communicated with a liquid inlet of the heat-preservation tank (8), a liquid outlet of the heat-preservation tank (8) is communicated with a liquid inlet of the steam boiler (9), and a gas outlet of the gas-liquid separator (7) is communicated with a gas inlet of the steam boiler (9) through a second pipeline (2);

the heat preservation tank (8) comprises an outer shell, an inner shell and a heat preservation cavity between the outer shell and the inner shell, wherein a liquid inlet and a liquid outlet of the heat preservation tank (8) are communicated with the heat preservation cavity, the liquid inlet of the heat preservation tank (8) is also communicated with a third pipeline, a heating solenoid (10) which extends spirally along the coaxial line of the inner shell is further arranged in the heat preservation cavity, a gas outlet of the heating solenoid (10) is communicated with a gas-liquid separator (7), a third tee joint is arranged on the second pipeline (2), and the third tee joint is communicated with a gas inlet of the heating solenoid (10).

2. The fermentation inhibiting system for citric acid production according to claim 1, characterized in that: a sugar liquor tank (5) for containing sugar liquor is located below a sugar liquor inlet of a heat exchanger, the sugar liquor tank (5) is communicated with the sugar liquor inlet through a first pipeline (1), and a sugar liquor pump (6) is further arranged on the first pipeline (1).

3. The fermentation-inhibiting system for citric acid production according to claim 2, characterized in that: the first pipeline (1) is also provided with a second tee joint (12), a first connector of the second tee joint (12) is communicated with a liquid inlet of the steam boiler (9), and a gas outlet of the steam boiler (9) is communicated with the steam pipeline.