A disc centrifuge demineralized water recycling system

Abstract

This application discloses a demineralized water recycling system for a disc centrifuge, solving the technical problem of high cost in recovering bacterial protein. The disc centrifuge demineralized water recycling system includes a disc centrifuge with a demineralized water inlet pipe and a demineralized water outlet pipe; the inlet pipe of a circulating water tank is connected to the demineralized water outlet pipe, and the outlet pipe of the circulating water tank is connected to the demineralized water inlet pipe; a circulating pump is installed on the outlet pipe of the circulating water tank; the inlet pipe of a heating tank is also connected to the outlet pipe of the circulating water tank, and the inlet pipe of the heating water tank is equipped with a heating valve; a heating mechanism is installed inside the heating tank; the makeup water pipe of an alkali tank is connected to the outlet pipe of the heating tank; the makeup water pipe of an acid tank is connected to the outlet pipe of the heating tank; and the makeup water pipe of a hot water tank is connected to the outlet pipe of the heating tank. This application can reduce the cost of recovering bacterial protein using a disc centrifuge.

Description

Technical Field

[0001] This application belongs to the field of centrifugal equipment technology, specifically relating to a demineralized water recycling system for a disc centrifuge. Background Technology

[0002] Industrial waste gas fermentation to produce ethanol is a new technology that uses carbon monoxide as a carbon source to produce ethanol through microbial fermentation. After the fermentation wastewater is distilled to extract ethanol, it contains a certain amount of microbial protein. Some production lines use disc centrifuges to recover the microbial protein in order to reduce the pollution of microbial protein to the environment. However, the operation of disc centrifuges requires the use of a large amount of demineralized water, such as the water used for turning on the drum, turning off the drum, rinsing water, and cooling water for the machine cover. Every 10-12 hours, the disc centrifuge needs to undergo a complete CIP (cleaning in place) cleaning process, which results in a high cost for recovering microbial protein. Summary of the Invention

[0003] To address the high cost of recovering bacterial protein, this application provides a demineralized water recycling system using a disc centrifuge.

[0004] In a first aspect of this application, a demineralized water recycling system for a disc centrifuge is provided, comprising:

[0005] Disc centrifuge, with demineralized water inlet pipe and demineralized water outlet pipe;

[0006] A circulating water tank, wherein the inlet pipe of the circulating water tank is connected to the demineralized water outlet pipe, and the outlet pipe of the circulating water tank is connected to the demineralized water inlet pipe;

[0007] A circulation pump is installed on the drain pipe of the circulating water tank;

[0008] A heating tank, the inlet pipe of which is also connected to the outlet pipe of the circulating water tank, and a heating mechanism is provided inside the heating tank;

[0009] The alkaline solution tank has a water supply pipe connected to the drain pipe of the heating tank, and the drain pipe of the alkaline solution tank is connected to the inner cavity of the disc centrifuge.

[0010] An acid tank, wherein the water supply pipe of the acid tank is connected to the drain pipe of the heating tank, and the drain pipe of the acid tank is connected to the inner cavity of the disc centrifuge;

[0011] A hot water tank, wherein the water supply pipe of the hot water tank is connected to the drain pipe of the heating tank, and the drain pipe of the hot water tank is connected to the inner cavity of the disc centrifuge.

[0012] In some embodiments, the circulating water tank is equipped with a demineralized water supply pipe.

[0013] In some embodiments, a heat exchange device is provided between the inlet pipe of the circulating water tank and the demineralized water outlet pipe.

[0014] In some embodiments, the heat exchange device is a plate heat exchanger, which has a first heat exchange channel and a second heat exchange channel. The two ends of the first heat exchange channel are respectively connected to the liquid inlet pipe of the circulating water tank and the demineralized water discharge pipe. The two ends of the second heat exchange channel are connected to heat release pipes, which are at least partially located inside the heating tank.

[0015] In some embodiments, a filter valve assembly is provided between the demineralized water drain pipe and the heat exchange device.

[0016] In some embodiments, the heating tank is provided with a heat exchange tube, the inlet of which is connected to a steam generator, and the outlet of which is connected to a condensate recovery pipe, which is connected to the hot water tank.

[0017] In some embodiments, the condensate recovery pipe is equipped with a condensate trap assembly.

[0018] In some embodiments, the drain pipe of the alkali tank is equipped with an alkali pump, the drain pipe of the acid tank is equipped with an acid pump, and the drain pipe of the hot water tank is equipped with a hot water pump.

[0019] In some embodiments, the disc centrifuge demineralized water recycling system is provided with multiple disc centrifuges, which are connected in parallel.

[0020] In some embodiments, the disc centrifuge is positioned at a height higher than the circulating water tank on the production line.

[0021] According to one or more embodiments of this application, the demineralized water recycling system for a disc centrifuge connects the inlet pipe of the heating tank to the outlet pipe of the circulating water tank. By opening and closing the pipe, the demineralized water recovered in the circulating water tank can enter the heating pipe and eventually enter the alkali tank, acid tank, and / or hot water tank. That is, the pH of the alkaline liquid in the alkali tank or the acidic liquid in the acid tank is adjusted by the recovered demineralized water. After the heating mechanism in the hot water tank is turned on to heat the recovered demineralized water, hot water can be input into the hot water tank and used for the hot water cleaning step in the CIP cleaning process of the disc centrifuge, thereby reducing the amount of demineralized water used and reducing the cost of recovering bacterial protein from the disc centrifuge. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of a disc centrifuge demineralized water recycling system in one or more embodiments of this application is shown.

[0023] Explanation of reference numerals in the attached diagram: 100-Disc centrifuge, 110-Demineralized water inlet pipe, 120-Demineralized water outlet pipe, 200-Circulating water tank, 210-Circulating pump, 220-Demineralized water replenishment pipe, 300-Heating tank, 310-Heating valve, 320-Heating mechanism, 330-Condensate recovery pipe, 340-Drain valve assembly, 400-Alkali tank, 410-Alkali pump, 420-Alkali replenishment pipe, 500-Acid tank, 510-Acid pump, 520-Acid replenishment pipe, 600-Hot water tank, 610-Hot water pump, 700-Heat exchange device, 800-Filter valve assembly. Detailed Implementation

[0024] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] Please see Figure 1 According to a first aspect of this application, a demineralized water recycling system for a disc centrifuge is provided, comprising a disc centrifuge 100, a circulating water tank 200, a circulating pump 210, a heating tank 300, an alkaline solution tank 400, an acid solution tank 500, and a hot water tank 600.

[0026] The disc centrifuge 100 is a device that uses centrifugal force to recover bacterial protein. The disc centrifuge 100 has a demineralized water inlet pipe 110 and a demineralized water outlet pipe 120. The demineralized water inlet pipe 110 is used to transport demineralized water to the disc centrifuge 100 for operation. Specifically, the outlet of the demineralized water inlet pipe 110 has at least three pipes to respectively transport the demineralized water to different positions within the disc centrifuge 100 for operation, such as: drum start-up water, shut-off water, rinsing water, and hood cooling water. The inlet end of the demineralized water outlet pipe 120 is used to collect the demineralized water used by the disc centrifuge 100. The structure of the inlet end of the demineralized water outlet pipe 120 can be adapted to different centrifuge designs. Demineralized water is water in which most of the dissolved salts and minerals have been removed through processes such as ion exchange, reverse osmosis, electrodialysis, or distillation. After being used by the disc centrifuge 100 as drum start-up water, shut-off water, rinsing water, and cooling water for the machine casing, the demineralized water still contains relatively few impurities, dissolved salts, and minerals and can be recycled. Of course, when the demineralized water is used as rinsing water, if there are many impurities in the disc centrifuge 100, the rinsing water can be discharged through the disc centrifuge 100's own drain pipe and not collected and used through the inlet end of the demineralized water drain pipe 120.

[0027] The circulating water tank 200 is a device for storing demineralized water. The inlet pipe of the circulating water tank 200 is connected to the demineralized water drain pipe 120, and the drain pipe of the circulating water tank 200 is connected to the demineralized water inlet pipe 110. The circulating pump 210 is installed on the drain pipe of the circulating water tank 200. The circulating pump 210 is a liquid pump. The circulating pump 210 drives the demineralized water in the circulating water tank 200 to circulate between the circulating water pump and the disc centrifuge, that is, at least part of the disc centrifuge 100 is operated. The demineralized water is recovered through the demineralized water drain pipe 120 and then enters the circulating water tank 200 again, thereby completing the recycling of demineralized water and reducing the amount of demineralized water used.

[0028] The heating tank 300 is designed to store a certain amount of demineralized water and heat it. The inlet pipe of the heating tank 300 is also connected to the outlet pipe of the circulating water tank 200. The heating tank 300 is equipped with a heating mechanism 320, which is used to heat the demineralized water.

[0029] The alkali tank 400 has an alkali replenishment pipe 420, the replenishment pipe of the alkali tank 400 is connected to the drain pipe of the heating tank 300, and the drain pipe of the alkali tank 400 is connected to the inner cavity of the disc centrifuge 100; the acid tank 500 has an acid replenishment pipe 520, the replenishment pipe of the acid tank 500 is connected to the drain pipe of the heating tank 300, and the drain pipe of the acid tank 500 is connected to the inner cavity of the disc centrifuge 100; the hot water tank 600 may have a hot water replenishment pipe, the replenishment pipe of the hot water tank 600 is connected to the drain pipe of the heating tank 300, and the drain pipe of the hot water tank 600 is connected to the inner cavity of the disc centrifuge 100.

[0030] The alkali tank 400, acid tank 500, and hot water tank 600 are required devices for the CIP cleaning process. The alkali tank 400 is used to store alkaline liquid, the acid tank 500 is used to store acidic liquid, and the hot water tank 600 is used to store hot water. The CIP cleaning process of the disc centrifuge 100 is completed by outputting alkaline liquid, acidic liquid, or hot water into the disc centrifuge 100 at different time periods through the alkali tank 400, acid tank 500, and hot water tank 600. It should be noted that this application does not recover the liquid from the disc centrifuge 100 during the CIP cleaning process.

[0031] This application connects the inlet pipe of the heating tank 300 to the outlet pipe of the circulating water tank 200, and the circulating water tank 200 can transport the recovered demineralized water to the alkali tank 400, acid tank 500 and / or hot water tank 600. That is, the recovered demineralized water can be used to adjust the pH of the alkaline liquid in the alkali tank 400 or the acidic liquid in the acid tank 500. After the heating mechanism 320 in the hot water tank 600 is turned on to heat the recovered demineralized water, hot demineralized water can be input into the hot water tank 600 for the hot water cleaning step in the CIP cleaning process of the disc centrifuge 100, thereby reducing the amount of demineralized water used and reducing the cost of recovering bacterial protein in the disc centrifuge 100.

[0032] In some embodiments, the circulating water tank 200 is equipped with a demineralized water supply pipe 220 to replenish the demineralized water in the circulating water tank 200 in a timely manner, thereby ensuring the stable operation of the demineralized water recycling system. Therefore, the circulating water tank 200 is also equipped with a level gauge to obtain the liquid level in the circulating water tank 200, thus facilitating the replenishment of demineralized water to the circulating water tank 200 by operators.

[0033] In some embodiments, the inlet pipe of the heating water tank 600 can be directly connected to the demineralized water drain pipe 120 via a pipeline, and a heating valve 310 can be directly installed on the pipeline. The demineralized water, used as cooling water for the shroud, has a high temperature after heat dissipation treatment of the disc centrifuge 100. By opening and closing the heating valve 310, this portion of the demineralized water with a higher temperature can be directly used by the alkali tank 400, acid tank 500, and / or hot water tank 600, thereby reducing energy consumption and lowering operating costs. In this case, the demineralized water required by the disc centrifuge 100 for cooling the shroud is provided by the demineralized water stored in the circulating water tank 200. The demineralized water used for purposes such as drum start-up water, shut-off water, and rinsing water has a temperature of room temperature or slightly higher than room temperature. After closing the heating valve 310, the recovered demineralized water can directly enter the circulating water tank 200.

[0034] Of course, in some embodiments, a heat exchange device 700 is provided between the inlet pipe of the circulating water tank 200 and the demineralized water outlet pipe 120. This heat is recovered through the heat exchange device 700, and the recovered heat energy can be transferred to devices or spaces requiring heat energy according to workshop needs, thus making rational use of heat energy and reducing the cost of recovering bacterial protein using the disc centrifuge 100. Specifically, depending on the temperature of the recovered demineralized water and the requirements of the CIP cleaning process, the recovered demineralized water can be either directly transported to the hot water tank 600 or transported to the circulating water tank 200.

[0035] In some embodiments, the heat exchange device 700 is a plate heat exchanger with a first heat exchange channel and a second heat exchange channel. The two ends of the first heat exchange channel are connected to the inlet pipe of the circulating water tank 200 and the demineralized water outlet pipe 120, respectively. The two ends of the second heat exchange channel are connected to heat release pipes, which are at least partially located inside the heating tank 300. A heat-conducting medium is provided inside the heat release pipes. That is, the recovered demineralized water enters the circulating water tank 200 after exchanging heat with the heat-conducting medium in the first and second heat exchange channels. The heat energy of the demineralized water recovered by the disc centrifuge 100 can be transferred to the heat-conducting medium in the second heat exchange channel through the plate heat exchanger, and finally transferred to the heating tank 300 through the heat release pipes. That is, the heat energy recovered by the heat exchange device 700 is directly applied to the heating tank 300 of the disc centrifuge demineralized water recycling system, reducing the energy consumption required for the heating structure to generate heat and reducing the cost of recovering bacterial protein by the disc centrifuge 100. In some embodiments, the heating device may be an electric heating device or a steam heating device.

[0036] In some embodiments, a filter valve assembly 800 is provided between the demineralized water drain pipe 120 and the heat exchange device 700. The filter valve assembly 800 is capable of filtering out impurities in the recovered demineralized water, thereby improving the purity of the recovered demineralized water, reducing the possibility of scaling in the circulating water tank 200, hot water tank 600, and various pipes, reducing the frequency of maintenance, and thus reducing the maintenance cost of the disc centrifuge demineralized water recycling system.

[0037] In some embodiments, the heating mechanism 320 is a steam heating device, which includes a steam generator and pipes connected to the steam generator. A heat exchange tube is installed inside the heating tank 300. The inlet of the heat exchange tube is connected to the steam generator, and the outlet of the heat exchange tube is connected to a condensate recovery pipe 330, which is connected to the hot water tank 600. Steam generated by the steam generator enters the heat exchange tube through the pipe and exchanges heat with the demineralized water in the hot water tank 600 to heat the demineralized water. The steam cools and forms condensate, which eventually collects at the bottom of the heat exchange tube. The condensate formed by the steam generated by the steam generator has few impurities and a high temperature, and can be recycled back into the hot water tank 600 through the condensate recovery pipe 330 for use in the CIP cleaning process.

[0038] In some embodiments, the condensate recovery pipe 330 is equipped with a steam trap assembly 340. The steam trap assembly 340 can automatically identify steam and water, and can achieve the function of automatically blocking steam and draining water, that is, continuously discharging the condensate in the heat exchange tube into the hot water tank 600 without affecting the steam in the heat exchange tube.

[0039] In some embodiments, an alkali pump 410 is installed in the drain pipe of the alkali tank 400, an acid pump 510 is installed in the drain pipe of the acid tank 500, and a hot water pump 610 is installed in the drain pipe of the hot water tank 600. The alkali pump 410, acid pump 510, and hot water pump 610 can all be corrosion-resistant pumps to pump the liquids from the alkali tank 400, acid tank 500, and hot water tank 600, respectively, to perform a CIP cleaning process on the disc centrifuge 100.

[0040] In some embodiments, the disc centrifuge 100 is positioned at a height higher than the circulating water tank 200 on the production line, so that the demineralized water used can automatically flow to the circulating water tank 200 under gravity, reducing the need for liquid pumps and lowering equipment costs. Simultaneously, the circulating water tank 200 can also be positioned higher than the heating tank 300, alkali tank 400, acid tank 500, and hot water tank 600, so that the demineralized water recovered in the circulating water tank 200 can automatically flow to these tanks under gravity.

[0041] Of course, in some embodiments, the alkali tank 400, acid tank 500 and hot water tank 600 can be positioned above the disc centrifuge 100. In this case, a liquid pump can be installed on the drain pipe of the heating tank 300 to pump the recovered demineralized water into the alkali tank 400, acid tank 500 or hot water tank 600.

[0042] In some embodiments, the disc centrifuge demineralized water recycling system includes multiple disc centrifuges 100 connected in parallel. These centrifuges can operate at different times, allowing some centrifuges to perform CIP cleaning while others continue operating normally to recover mycelial proteins. This enables online cleaning of the centrifuges 100 within the system, improving mycelial protein recovery efficiency and reducing the cost of mycelial protein recovery.

[0043] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0047] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A desalted water recycling system for a disc centrifuge, characterized by, include: Disc centrifuge, with demineralized water inlet pipe and demineralized water outlet pipe; A circulating water tank, wherein the inlet pipe of the circulating water tank is connected to the demineralized water outlet pipe, and the outlet pipe of the circulating water tank is connected to the demineralized water inlet pipe; A circulation pump is installed on the drain pipe of the circulating water tank; A heating tank, the inlet pipe of which is also connected to the outlet pipe of the circulating water tank, and a heating mechanism is provided inside the heating tank; The alkaline solution tank has a water supply pipe connected to the drain pipe of the heating tank, and the drain pipe of the alkaline solution tank is connected to the inner cavity of the disc centrifuge. An acid tank, wherein the water supply pipe of the acid tank is connected to the drain pipe of the heating tank, and the drain pipe of the acid tank is connected to the inner cavity of the disc centrifuge; A hot water tank, wherein the water supply pipe of the hot water tank is connected to the drain pipe of the heating tank, and the drain pipe of the hot water tank is connected to the inner cavity of the disc centrifuge.

2. The disc centrifuge desalination water recycling system of claim 1, wherein, The circulating water tank is equipped with a demineralized water supply pipe.

3. The disc centrifuge desalination water recycling system of claim 1, wherein, A heat exchange device is installed between the inlet pipe of the circulating water tank and the demineralized water outlet pipe.

4. The disc centrifuge desalination water recycling system of claim 3, wherein, The heat exchange device is a plate heat exchanger, which has a first heat exchange channel and a second heat exchange channel. The two ends of the first heat exchange channel are respectively connected to the liquid inlet pipe of the circulating water tank and the demineralized water discharge pipe. The two ends of the second heat exchange channel are connected to heat release pipes, and the heat release pipes are at least partially located inside the heating tank.

5. The disc centrifuge desalination water recycling system of claim 3, wherein, A filter valve assembly is installed between the demineralized water drain pipe and the heat exchange device.

6. The disc centrifuge desalination water recycling system of claim 1, wherein, The heating tank is equipped with a heat exchange tube. The inlet of the heat exchange tube is connected to a steam generator, and the outlet of the heat exchange tube is connected to a condensate recovery pipe, which is connected to the hot water tank.

7. The disc centrifuge desalination water recycling system of claim 6, wherein, The condensate recovery pipe is equipped with a condensate drain valve assembly.

8. The disc centrifuge desalination water recycling system of claim 1, wherein, The drain pipe of the alkali tank is equipped with an alkali pump, the drain pipe of the acid tank is equipped with an acid pump, and the drain pipe of the hot water tank is equipped with a hot water pump.

9. The disc centrifuge desalination water recycling system of claim 1, wherein, The demineralized water recycling system of the disc centrifuge is equipped with multiple disc centrifuges, which are connected in parallel.

10. The disc centrifuge desalination water recycling system of claim 1, wherein, The disc centrifuge is positioned at a height higher than the circulating water tank.

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