System for producing liquid fertilizer by using fermentation waste liquid

Abstract

The utility model relates to the field of waste recycling equipment, in particular to a system for producing a liquid fertilizer by using fermentation waste liquid. The system comprises: a heat exchanger for heating the fermentation waste liquid; the separation part comprises a centrifugal machine and a reverse osmosis membrane, a feed port of the centrifugal machine is communicated with a discharge port of the heat exchanger, a feed port of the reverse osmosis membrane is communicated with a discharge port of the centrifugal machine, and the reverse osmosis membrane comprises a concentrated phase discharge port; a material inlet of the mixing treatment part is respectively communicated with a material outlet of the centrifugal machine and a concentrated phase material outlet; according to the system, a large amount of high-value liquid fertilizer can be obtained only through the heat exchanger, the separation part and the mixing treatment part, the operation steps and the treatment cost of the system are reduced, in addition, precipitation of large protein molecules in organic matter is achieved through the heat exchanger and the centrifugal machine, and the overall loss of raw materials is low.

Description

Technical Field

[0001] The present application relates to the field of waste recycling equipment, and in particular to a system for producing liquid fertilizer using fermentation waste liquid. Background Art

[0002] With the widespread promotion of the application of bio-fermentation technology for carbon-containing industrial tail gas, a large amount of bio-fermentation residues are generated, which makes the treatment of bio-fermentation residues a hot field at present; the current treatment method for bio-fermentation residues of carbon-containing industrial tail gas is to first extract fuel ethanol and feed protein from the bio-fermentation residues, and then directly treat the remaining residues as fermentation waste liquid and discharge them after wastewater treatment; however, excessive nutrients such as nitrogen, phosphorus and potassium will be added during the bio-fermentation process, and these excessive nutrients will remain in the final fermentation waste liquid. At the same time, the bio-fermentation process is accompanied by the reproduction and metabolism of the bacteria, and the reproduction and metabolism of the bacteria will produce rich organic matter (such as organic nitrogen), which will eventually remain in the fermentation waste liquid. If these fermentation waste liquids are directly treated as wastewater, it will cause a great waste of resources and generate high energy consumption in the wastewater treatment process. Therefore, extracting usable nutrients and organic matter from fermentation waste liquid is a hot field at present.

[0003] Liquid fertilizer has great application potential in the agricultural market. Converting fermentation waste liquid into liquid fertilizer can not only solve the resource waste of directly treating fermentation waste liquid as wastewater, but also maximize the recycling value of fermentation waste liquid. However, most of the equipment currently using biological fermentation liquid to produce liquid fertilizer needs to first separate the nutrients such as nitrogen, phosphorus and potassium from the organic matter in the biological fermentation liquid and then process it before preparing liquid fertilizer. Not only is the overall equipment operation complicated and the processing cost high, but it also consumes a large amount of raw materials, resulting in waste of resources. Utility Model Content

[0004] The present application provides a system for producing liquid fertilizer using fermentation waste liquid, so as to solve the technical problems of complex operation, high processing cost and large loss of raw materials in the prior art of producing liquid fertilizer using fermentation liquid.

[0005] In a first aspect, the present application provides a system for producing liquid fertilizer using fermentation waste liquid, the system comprising:

[0006] a heat exchanger for heating the fermentation waste liquid;

[0007] A separation part, comprising a centrifuge and a reverse osmosis membrane, wherein the feed port of the centrifuge is connected to the discharge port of the heat exchanger, the feed port of the reverse osmosis membrane is connected to the discharge port of the centrifuge, and the reverse osmosis membrane comprises a concentrated phase discharge port;

[0008] A mixing processing section, wherein the feed port of the mixing processing section is respectively connected to the discharge port of the centrifuge and the dense phase discharge port.

[0009] Optionally, the separation section further comprises a concentrated brine buffer tank, the feed inlet of the concentrated brine buffer tank is connected to the concentrated phase discharge port of the reverse osmosis membrane, and the discharge port of the concentrated brine buffer tank is connected to the feed inlet of the mixing treatment section.

[0010] Optionally, the mixing treatment section includes a mixing tank and a pH adjustment tank, the feed port of the mixing tank is respectively connected to the discharge port of the centrifuge and the dense phase discharge port, and the liquid outlet of the pH adjustment tank is connected to the liquid inlet of the mixing tank.

[0011] Optionally, the mixing processing section further comprises a concentrate buffer tank, the feed port of the concentrate buffer tank is connected to the liquid outlet of the centrifuge, and the discharge port of the concentrate buffer tank is connected to the feed port of the mixing processing section.

[0012] Optionally, the system further includes:

[0013] The post-processing part comprises a sterilizing device and a packaging machine, wherein the feed port of the sterilizing device is connected to the discharge port of the mixing processing part, and the discharge port of the sterilizing device is connected to the feed port of the packaging machine.

[0014] Optionally, the system further includes:

[0015] A raw material buffer tank, wherein the discharge port of the raw material buffer tank is connected to the feed port of the heat exchanger.

[0016] Optionally, the reverse osmosis membrane further includes a dilute phase outlet, and the dilute phase outlet is connected to a feed inlet of the raw material buffer tank.

[0017] Optionally, the centrifuge comprises a disc centrifuge.

[0018] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0019] The embodiment of the present application provides a system for producing liquid fertilizer using fermentation waste liquid. The high-temperature instability of soluble protein in the fermentation waste liquid is used to heat the fermentation waste liquid with a heat exchanger to promote the initial denaturation of the soluble protein and form a large molecular protein precipitate. The formed large molecular protein precipitate is then separated from the fermentation waste liquid by a centrifuge in a separation part to obtain a supernatant fermentation liquid containing nutrients such as nitrogen, phosphorus and potassium and growth factors such as vitamins. The water in the supernatant fermentation liquid is separated from the nutrients and growth factors by the reverse osmosis effect of a reverse osmosis membrane in the separation part to achieve the fermentation waste liquid. The nutrient elements and growth factors in the supernatant fermentation liquid are concentrated to obtain a mixed liquid, and the mixed liquid and the supernatant fermentation liquid are mixed in a mixing tank in the mixing treatment part. The mixing process can adjust the concentrations of some protein molecules, growth factors and nutrient elements in the supernatant fermentation liquid and the mixed liquid, thereby realizing the preparation of liquid fertilizer; the system only needs a heat exchanger, a separation part and a mixing treatment part to obtain a large amount of high-value liquid fertilizer, reducing the operating steps and processing costs of the system. In addition, the system realizes the precipitation of large protein molecules in organic matter through a heat exchanger and a centrifuge, and the overall raw material loss is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 A logical structure diagram of a system for preparing liquid fertilizer using fermentation waste liquid provided in an embodiment of the present application;

[0023] Figure 2 A system structure diagram for preparing liquid fertilizer using fermentation waste liquid provided in an embodiment of the present application;

[0024] Among them, 1-heat exchanger, 2-centrifuge, 3-reverse osmosis membrane, 4-mixing tank, 5-pH adjustment tank, 6-sterilization device, 7-raw material buffer tank, 8-brine buffer tank, 9-concentrated liquid buffer tank, 10-packaging machine. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Figure 1 The following is an exemplary diagram showing the logical structure of a system for preparing liquid fertilizer using fermentation waste liquid provided in an embodiment of the present application;

[0029] Figure 2 The structure diagram of a system for preparing liquid fertilizer using fermentation waste liquid provided in an embodiment of the present application is exemplarily shown;

[0030] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a system for producing liquid fertilizer using fermentation waste liquid, the system comprising:

[0031] Heat exchanger 1, used for heating fermentation waste liquid;

[0032] The separation part includes a centrifuge 2 and a reverse osmosis membrane 3, wherein the feed port of the centrifuge 2 is connected to the discharge port of the heat exchanger 1, the feed port of the reverse osmosis membrane 3 is connected to the discharge port of the centrifuge 2, and the reverse osmosis membrane 3 includes a dense phase discharge port;

[0033] A mixing processing section, wherein the feed port of the mixing processing section is respectively connected to the discharge port of the centrifuge 2 and the dense phase discharge port.

[0034] It should be noted that the fermentation waste liquid may refer to: the fermentation liquid produced in the production process of preparing fuel ethanol by biological method using carbon monoxide industrial tail gas is used as raw material, and the fermentation liquid raw material is distilled and centrifuged in sequence to extract fuel ethanol and feed protein, and the residual fermentation waste liquid obtained after centrifugation is the fermentation waste liquid. The fermentation liquid may be composed of the distilled water remaining in the distillation stage and the protein clear liquid separated in the centrifugation stage.

[0035] It should be noted that the fermentation waste liquid may include organic nitrogen and / or inorganic nitrogen, the fermentation liquid may also include nutrient elements such as phosphorus, calcium, magnesium and potassium, and the fermentation liquid may also include growth factors such as vitamins.

[0036] It should be noted that the heat exchanger 1 can heat the fermentation waste liquid to 60°C or above. This is because the fermentation waste liquid contains a large amount of soluble protein (such as organic nitrogen), and the macromolecular protein in the soluble protein generally undergoes denaturation of protein molecules above 60°C to form a solid phase of macromolecular precipitation, and promotes the separation of the macromolecular protein of the soluble protein in the fermentation waste liquid from the fermentation waste liquid, thereby facilitating the improvement of the separation effect of the subsequent centrifuge 2.

[0037] It should be noted that the centrifuge 2 will separate the large protein molecule precipitate produced in the fermentation waste liquid during the heating stage to obtain the supernatant fermentation liquid; the components of the supernatant fermentation liquid may be nutrient elements such as phosphorus, calcium, magnesium and potassium, and growth factors such as vitamins.

[0038] It should be noted that the reverse osmosis membrane 3 can fully concentrate the nutrients such as phosphorus, calcium, magnesium and potassium, and growth factors such as vitamins in the supernatant fermentation liquid to obtain a mixed liquid; the concentration ratio of the reverse osmosis membrane 3 can be more than 4 times, which can promote the nutrients such as phosphorus, calcium, magnesium and potassium, and growth factors such as vitamins in the supernatant fermentation liquid to be fully concentrated to obtain a liquid fertilizer that meets the expected total nutrients.

[0039] In some optional embodiments, the separation section further includes a concentrated brine buffer tank 8, the feed port of the concentrated brine buffer tank 8 is connected to the concentrated phase discharge port of the reverse osmosis membrane 3, and the discharge port of the concentrated brine buffer tank 8 is connected to the feed port of the mixing treatment section; in these embodiments, the introduction of the concentrated brine buffer tank 8 in the reverse osmosis treatment section can fully accommodate the reverse osmosis concentrate obtained by the reverse osmosis membrane 3. In addition, the concentrated brine buffer tank 8 can also serve as a buffer tank for the reverse osmosis concentrate, thereby controlling the flow of the reverse osmosis concentrate.

[0040] In some optional embodiments, the mixing treatment section includes a mixing tank 4 and a pH adjustment tank 5, the feed port of the mixing tank 4 is respectively connected to the discharge port of the centrifuge 2 and the dense phase discharge port, and the liquid outlet of the pH adjustment tank 5 is connected to the liquid inlet of the mixing tank 4; in these embodiments, the mixing tank 4 is introduced into the mixing treatment section, and the supernatant fermentation liquid separated by the centrifuge 2 and the mixed liquid concentrated by the reverse osmosis membrane 3 can be accommodated by the mixing tank 4, and the supernatant fermentation liquid and the mixed liquid are mixed sufficiently to obtain liquid fertilizer; in addition, the pH adjustment tank 5 is introduced into the mixing treatment section, and the pH of the liquid fertilizer can be adjusted to 6.0-7.0, which can make the pH of the final liquid fertilizer product within a neutral range, which can not only meet the needs of the subsequent liquid fertilizer in the use stage, but also can preliminarily adjust the living environment of the bacterial flora in the mixed liquid through pH adjustment, thereby improving the subsequent sterilization effect of the liquid fertilizer in the sterilization device 6.

[0041] In some optional embodiments, the mixing treatment section further includes a concentrate buffer tank 9, the feed port of the concentrate buffer tank 9 is connected to the liquid outlet of the centrifuge 2, and the outlet of the concentrate buffer tank 9 is connected to the feed port of the mixing treatment section; since liquid fertilizer is composed of concentrated organic matter (such as organic nitrogen) and concentrated nutrients such as phosphorus, calcium, magnesium and potassium, in these embodiments, the concentrate buffer tank 9 is introduced into the mixing treatment section, so that the fermentation supernatant separated by the centrifuge 2 can be stored, which is convenient for subsequent mixing with the mixed liquid concentrated by the reverse osmosis membrane 3 to obtain liquid fertilizer.

[0042] In some optional embodiments, the system further comprises:

[0043] The post-processing part includes a sterilization device 6 and a packaging machine 10, the feed port of the sterilization device 6 is connected to the discharge port of the mixing processing part, and the discharge port of the sterilization device 6 is connected to the feed port of the packaging machine 10; in these embodiments, by introducing a post-processing part into the system, and the post-processing part may include a sterilization device 6 and a packaging machine 10, the liquid fertilizer can be sterilized by the sterilization device 6 to obtain liquid fertilizer that can be stored for a long time, and then the sterilized liquid fertilizer can be evenly packaged by the packaging machine 10, thereby facilitating the subsequent transportation and sales of the liquid fertilizer product.

[0044] It should be noted that the working temperature of the sterilizing device 6 can be 115° C. to 121° C., and the working time of the sterilizing device 6 can be 20 min to 30 min. The sterilizing device 6 can effectively kill the bacteria in the liquid fertilizer, thereby obtaining pure liquid fertilizer.

[0045] In some optional embodiments, the system further comprises:

[0046] A raw material buffer tank 7, wherein the discharge port of the raw material buffer tank 7 is connected to the feed port of the heat exchanger 1; in these embodiments, the raw material buffer tank 7 is introduced into the system. The use of the raw material buffer tank 7 can promote the uniform mixing of various components in the fermentation waste liquid, thereby improving the heating effect of the heat exchanger 1 in the subsequent system on the fermentation waste liquid.

[0047] In some optional embodiments, the reverse osmosis membrane 3 also includes a light phase outlet, and the light phase outlet is connected to the feed inlet of the raw material buffer tank 7; in these embodiments, the reverse osmosis membrane 3 may include a light phase outlet, and the water generated during the concentration process of the reverse osmosis membrane 3 can be returned to the raw material buffer tank 7 through the light phase outlet, thereby realizing the recycling of water and further reducing the additional consumption of fermentation waste liquid raw materials by the overall system.

[0048] In some optional embodiments, the centrifuge 2 includes a disc centrifuge 2; in these embodiments, the centrifuge 2 may include a disc centrifuge 2, and the disc centrifuge 2 may be used to fully separate the large protein molecules in the fermentation waste liquid from the fermentation waste liquid, thereby obtaining a pure supernatant fermentation liquid.

[0049] It should be noted that the workflow of the system includes:

[0050] S1. The fermentation waste liquid in the raw material buffer tank 7 is heated by a heat exchanger 1, and then the heated fermentation waste liquid is centrifuged by a centrifuge 2 to obtain a supernatant fermentation liquid, and then the supernatant fermentation liquid is circulated through a pipeline to a concentrated liquid buffer tank 9 for storage;

[0051] S2. The supernatant fermentation broth is subjected to reverse osmosis using a reverse osmosis membrane 3 to obtain a reverse osmosis concentrate, which is then circulated through a pipeline to a concentrated brine buffer tank 8 for storage;

[0052] S3. The supernatant fermentation broth and the reverse osmosis concentrate are mixed in a mixing tank 4 using a pH adjustment tank 5 to obtain a mixed solution;

[0053] S4. The pH of the mixed solution is adjusted by a pH adjustment tank 5 so that the mixed solution is neutral to obtain a coarse liquid fertilizer;

[0054] S5. The coarse liquid fertilizer is sterilized by a sterilizing device 6, and then the sterilized coarse liquid fertilizer is packaged by a packaging machine 10 to obtain a liquid fertilizer product.

[0055] The present application will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are intended only to illustrate the present application and are not intended to limit the scope of the present application. The experimental methods for which specific conditions are not specified in the following examples are usually measured according to industry standards. If there is no corresponding industry standard, then the conditions recommended by the manufacturer are followed.

[0056] Example 1

[0057] The fermentation liquid produced in the production process of fuel ethanol using the carbon monoxide industrial tail gas biological method is used as the raw material, and then the fermentation liquid raw material is distilled and centrifuged in sequence to extract fuel ethanol and feed protein. The residual fermentation waste liquid obtained after centrifugation is the fermentation waste liquid. The fermentation waste liquid contains nitrogen elements such as organic nitrogen and inorganic nitrogen, as well as trace elements such as phosphorus, calcium, magnesium, potassium, and growth factors such as vitamins.

[0058] like Figure 1 and Figure 2 A system for producing liquid fertilizer using fermentation waste liquid comprises:

[0059] Heat exchanger 1, used for heating fermentation waste liquid;

[0060] A raw material buffer tank 7, wherein the discharge port of the raw material buffer tank 7 is connected to the feed port of the heat exchanger 1;

[0061] The separation part includes a centrifuge 2, a reverse osmosis membrane 3 and a concentrated brine buffer tank 8, wherein the feed port of the centrifuge 2 is connected to the discharge port of the heat exchanger 1, the feed port of the reverse osmosis membrane 3 is connected to the discharge port of the centrifuge 2, the reverse osmosis membrane 3 includes a dense phase discharge port and a dilute phase discharge port, the dilute phase discharge port is connected to the feed port of the raw material buffer tank 7, the feed port of the concentrated brine buffer tank 8 is connected to the dense phase discharge port of the reverse osmosis membrane 3, and the discharge port of the concentrated brine buffer tank 8 is connected to the feed port of the mixing tank 4;

[0062] The mixing treatment section includes a mixing tank 4, a pH adjustment tank 5 and a concentrated solution buffer tank 9. The feed port of the mixing tank 4 is respectively connected to the discharge port and the concentrated phase discharge port of the centrifuge 2, the liquid outlet of the pH adjustment tank 5 is connected to the liquid feed port of the mixing tank 4, the feed port of the concentrated solution buffer tank 9 is connected to the liquid outlet of the centrifuge 2, and the discharge port of the concentrated solution buffer tank 9 is connected to the feed port of the mixing tank 4;

[0063] The post-processing section includes a sterilizing device 6 and a packaging machine 10 . The feed port of the sterilizing device 6 is connected to the discharge port of the mixing tank 4 , and the discharge port of the sterilizing device 6 is connected to the feed port of the packaging machine 10 .

[0064] The centrifuge 2 comprises a disc centrifuge 2 .

[0065] Comparative Example 1

[0066] Comparative Example 1 and Example 1 are compared. The difference between Comparative Example 1 and Example 1 is:

[0067] Heat exchanger 1 is not used.

[0068] Comparative Example 2

[0069] Comparative Example 2 and Example 1 are compared. The difference between Comparative Example 2 and Example 1 is:

[0070] Reverse osmosis membrane 3 is not used.

[0071] Related experiments and effect data:

[0072] The indicators of the liquid fertilizers obtained in the various embodiments and comparative examples were measured respectively, and the results are shown in Table 1.

[0073] Table 1 Indices of liquid fertilizers obtained in various embodiments and comparative examples

[0074]

[0075] Detailed analysis of Table 1:

[0076] Total nutrients refer to the sum of the concentrations of nitrogen, phosphorus pentoxide and potassium oxide in liquid fertilizer; among them, the potassium content in liquid fertilizer is generally indicated by the content of potassium oxide (K2O), while the phosphorus content in liquid fertilizer is indicated by the content of phosphorus pentoxide (P2O5).

[0077] Organic matter refers to the sum of the concentrations of organic matter in liquid fertilizer.

[0078] It can be seen from the data in Table 1 that the embodiment of the present application provides a system for producing liquid fertilizer using fermentation waste liquid. The system only requires a heat exchanger 1, a separation unit and a mixing treatment unit to obtain a large amount of high-value liquid fertilizer, which reduces the operating steps and processing costs of the system. In addition, the system uses a heat exchanger and a centrifuge to achieve the precipitation of large protein molecules in organic matter, and the overall raw material loss is low. The final safety index (in terms of elements) can be: mercury <5mg / kg, arsenic <5mg / kg, cadmium <5mg / kg, lead <10mg / kg, chromium <10mg / kg. Organic and inorganic liquid fertilizers.

[0079] In addition, the embodiment of the present application provides a system for preparing liquid fertilizer using fermentation waste liquid. The overall system is environmentally friendly and pollution-free during the production process. In addition, the system also solves the environmental problems caused by the direct discharge of fermentation waste liquid and the high energy consumption problem caused by the traditional direct sewage treatment process of fermentation waste liquid.

[0080] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A system for producing liquid fertilizer using fermentation waste liquid, characterized in that: The system comprises: A heat exchanger (1) for heating the fermentation waste liquid; A separation section, comprising a centrifuge (2) and a reverse osmosis membrane (3), wherein the feed port of the centrifuge (2) is connected to the discharge port of the heat exchanger (1), the feed port of the reverse osmosis membrane (3) is connected to the discharge port of the centrifuge (2), and the reverse osmosis membrane (3) comprises a dense phase discharge port; A mixing processing section, wherein the feed port of the mixing processing section is respectively connected to the discharge port of the centrifuge (2) and the dense phase discharge port.

2. The system according to claim 1, characterized in that The separation section further comprises a concentrated brine buffer tank (8), the feed port of the concentrated brine buffer tank (8) being connected to the concentrated phase discharge port of the reverse osmosis membrane (3), and the discharge port of the concentrated brine buffer tank (8) being connected to the feed port of the mixing treatment section.

3. The system according to claim 1, characterized in that The mixing treatment section comprises a mixing tank (4) and a pH adjustment tank (5), wherein the feed port of the mixing tank (4) is respectively connected to the discharge port of the centrifuge (2) and the dense phase discharge port, and the liquid outlet of the pH adjustment tank (5) is connected to the liquid inlet of the mixing tank (4).

4. The system according to claim 1, characterized in that The mixing treatment section further comprises a concentrated solution buffer tank (9), the feed port of the concentrated solution buffer tank (9) being connected to the liquid outlet of the centrifuge (2), and the outlet of the concentrated solution buffer tank (9) being connected to the feed port of the mixing treatment section.

5. The system according to claim 1, characterized in that The system further comprises: The post-processing section comprises a sterilizing device (6) and a packaging machine (10), wherein the feed port of the sterilizing device (6) is connected to the discharge port of the mixing processing section, and the discharge port of the sterilizing device (6) is connected to the feed port of the packaging machine (10).

6. The system according to claim 1, characterized in that The system further comprises: A raw material buffer tank (7), wherein the discharge port of the raw material buffer tank (7) is connected to the feed port of the heat exchanger (1).

7. The system according to claim 6, characterized in that The reverse osmosis membrane (3) further comprises a dilute phase discharge port, wherein the dilute phase discharge port is connected to a feed port of the raw material buffer tank (7).

8. The system according to claim 1, characterized in that The centrifuge (2) comprises a disc centrifuge (2).

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