Membrane method extraction and concentration system for itaconic acid recovery
By using the membrane extraction and concentration system in the production process of itaconic acid, including filtration pressure, ceramic membrane, nanofiltration and reverse osmosis devices, the problems of large energy consumption, inconvenient operation, low yield and large waste liquid emissions in the production process of itaconic acid in the prior art are solved, and efficient itaconic acid yield and concentration efficiency are achieved.
Patent Information
- Application Number
- CN202420466328.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-03-12
AI Technical Summary
In the prior art, there are problems such as high energy consumption, inconvenient operation, low yield of itaconic acid and large waste liquid emissions during the production process.
The membrane extraction and concentration system is adopted, including a filter pressing device, a ceramic membrane device, a nanofiltration device and a reverse osmosis device. Through these devices, solid-liquid separation, filtration, concentration and removal of suspended impurities are carried out in turn to improve the yield and concentration efficiency of itaconic acid.
It effectively improves the yield and concentration efficiency of itaconic acid, reduces the external displacement of itaconic acid in the production waste liquid, reduces energy consumption and operating costs, and reduces the operating load of traditional evaporation processes.
Smart Images
Figure CN222804985U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of itaconic acid recovery, in particular to a membrane extraction and concentration system for itaconic acid recovery. Background Art
[0002] Itaconic acid is an organic compound with a wide range of application values. Currently, the main methods for recovering and extracting itaconic acid from itaconic acid fermentation broth include: direct concentration crystallization method, ion exchange resin method, solvent extraction method, itaconic acid insoluble salt precipitation method, etc.
[0003] At present, the most commonly used method for extracting and recovering itaconic acid by itaconic acid production enterprises is direct concentration and crystallization, and other methods are mainly used as auxiliary direct concentration and crystallization. However, the direct concentration and crystallization method has the disadvantages of high energy consumption, inconvenient operation, low itaconic acid yield and large amount of waste liquid discharge. Summary of the invention
[0004] In order to solve the above problems existing in the prior art, the utility model provides a membrane extraction and concentration system for itaconic acid recovery, which can effectively improve the yield of itaconic acid and reduce the discharge amount of itaconic acid in production waste liquid.
[0005] The purpose of the utility model can be achieved through the following technical solutions:
[0006] A membrane extraction and concentration system for itaconic acid recovery, comprising a raw material storage tank, a filter press device, a filter press device clear liquid storage tank, a ceramic membrane device, a ceramic membrane clear liquid storage tank, a primary nanofiltration device, a nanofiltration permeate storage tank, a reverse osmosis device and a reverse osmosis clear liquid storage tank;
[0007] The raw material storage tank is connected to the filter press device, the filter press device is connected to the filter press device clear liquid storage tank, the filter press device clear liquid storage tank is connected to the filter press device clear liquid storage tank, the filter press device clear liquid storage tank is connected to the ceramic membrane device, the ceramic membrane device is connected to the ceramic membrane clear liquid storage tank, the ceramic membrane clear liquid storage tank is connected to the first-level nanofiltration device, the first-level nanofiltration device is connected to the nanofiltration permeate storage tank, the nanofiltration permeate storage tank is connected to the reverse osmosis device, and the reverse osmosis device is connected to the reverse osmosis clear liquid storage tank.
[0008] Furthermore, the reverse osmosis device is connected to a reverse osmosis clear liquid storage tank, the reverse osmosis clear liquid storage tank is connected to a first-level nanofiltration concentrated liquid storage tank and a second-level nanofiltration concentrated liquid storage tank, the first-level nanofiltration device is connected to the first-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration concentrated liquid storage tank, and the first-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration concentrated liquid storage tank are connected to the second-level nanofiltration device.
[0009] Furthermore, the first-stage nanofiltration concentrated liquid storage tank and the second-stage nanofiltration concentrated liquid storage tank are both connected to the secondary nanofiltration device.
[0010] Furthermore, the outlet of the ceramic membrane device refluxes to the delivery pipeline of the raw material storage tank, and a reflux automatic control valve is provided on the delivery pipeline.
[0011] Furthermore, the first-stage nanofiltration concentrated liquid storage tank and the second-stage nanofiltration concentrated liquid storage tank are used alternately.
[0012] Furthermore, the permeates of the primary nanofiltration device and the secondary nanofiltration device are both collected in the nanofiltration permeate storage tank.
[0013] Furthermore, booster delivery pumps are provided between the raw material storage tank and the filter press device, between the clear liquid storage tank of the filter press device and the ceramic membrane device, between the ceramic membrane clear liquid storage tank and the first-level nanofiltration device, between the first-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration device, between the second-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration device, between the nanofiltration permeate storage tank and the reverse osmosis device, and between the reverse osmosis clear liquid storage tank and the first-level nanofiltration concentrated liquid storage tank.
[0014] Furthermore, the ceramic membrane device, the primary nanofiltration device, the secondary nanofiltration device and the reverse osmosis device are all provided with a safety filter before entering the membrane.
[0015] Furthermore, the ceramic membrane device is provided with an online chemical cleaning device for cleaning the ceramic membrane, and the primary nanofiltration device, the secondary nanofiltration device and the reverse osmosis device are jointly provided with an online chemical cleaning device for cleaning the nanofiltration membrane and the reverse osmosis membrane.
[0016] The beneficial effects of the utility model are:
[0017] (1) By setting up a filter press device, a ceramic membrane device, a primary nanofiltration device and a reverse osmosis device, the technical effect that can be achieved is that itaconic acid in the itaconic acid mother liquor can be extracted through the filter press device, the ceramic membrane device, the nanofiltration device and the reverse osmosis device in sequence, and then through the concentration process, the suspended impurities in the itaconic acid mother liquor can be better removed, the operation stability is good, the yield of itaconic acid can be effectively improved, the discharge amount of itaconic acid in the production waste liquid can be reduced, the concentration efficiency and purity of itaconic acid can be improved, the energy consumption and operating costs can be reduced, and the operation load of the traditional evaporation process can be effectively reduced.
[0018] (2) By setting up a reverse osmosis clear liquid storage tank, the technical effect that can be achieved is that the clear liquid from the reverse osmosis storage tank flows back to the raw material storage tank through a conveying pipeline, and itaconic acid is cyclically extracted, thereby avoiding waste, reducing costs, and increasing the yield of itaconic acid. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.
[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION
[0021] The technical solutions 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 only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.
[0022] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0024] Reference Figure 1 , which is a membrane extraction and concentration system for itaconic acid recovery disclosed in the utility model, including a raw material storage tank, a filter press device, a filter press device clear liquid storage tank, a ceramic membrane device, a ceramic membrane clear liquid storage tank, a primary nanofiltration device, a nanofiltration permeate storage tank, a reverse osmosis device and a reverse osmosis clear liquid storage tank.
[0025] The raw material storage tank is connected to the filter press device, the filter press device is connected to the filter press device clear liquid storage tank, the filter press device clear liquid storage tank is connected to the filter press device clear liquid storage tank, the filter press device clear liquid storage tank is connected to the ceramic membrane device, the ceramic membrane device is connected to the ceramic membrane clear liquid storage tank, the ceramic membrane clear liquid storage tank is connected to the first-level nanofiltration device, the first-level nanofiltration device is connected to the nanofiltration permeate storage tank, the nanofiltration permeate storage tank is connected to the reverse osmosis device, and the reverse osmosis device is connected to the reverse osmosis clear liquid storage tank.
[0026] Itaconic acid in the itaconic acid mother liquor can be extracted through a filter press device, a ceramic membrane device, a nanofiltration device and a reverse osmosis device in sequence, and then the suspended impurities in the itaconic acid mother liquor can be removed well through a concentration process. The operation stability is good, the yield of itaconic acid can be effectively improved, the discharge amount of itaconic acid in the production waste liquid can be reduced, the concentration efficiency and purity of itaconic acid can be improved, the energy consumption and operating costs can be reduced, and the operation load of the traditional evaporation process can be effectively reduced.
[0027] The reverse osmosis device is connected to the reverse osmosis clear liquid storage tank, the reverse osmosis clear liquid storage tank is connected to the first-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration concentrated liquid storage tank, the first-level nanofiltration device is connected to the first-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration concentrated liquid storage tank, and the first-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration concentrated liquid storage tank are connected to the second-level nanofiltration device.
[0028] The first stage nanofiltration concentrated liquid storage tank and the second stage nanofiltration concentrated liquid storage tank are both connected to the secondary nanofiltration device.
[0029] The outlet of the ceramic membrane device refluxes to the delivery pipeline of the raw material storage tank. The delivery pipeline is provided with a reflux automatic control valve to circulate and extract itaconic acid, thereby avoiding waste and reducing costs.
[0030] The first stage nanofiltration concentrated liquid storage tank and the second stage nanofiltration concentrated liquid storage tank are used alternately.
[0031] The permeates of the primary nanofiltration device and the secondary nanofiltration device are collected in a nanofiltration permeate storage tank.
[0032] Booster pumps are installed between the raw material storage tank and the filter press device, between the clear liquid storage tank of the filter press device and the ceramic membrane device, between the ceramic membrane clear liquid storage tank and the first-level nanofiltration device, between the first-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration device, between the second-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration device, between the nanofiltration permeate storage tank and the reverse osmosis device, and between the reverse osmosis clear liquid storage tank and the first-level nanofiltration concentrated liquid storage tank.
[0033] The ceramic membrane device, the first-stage nanofiltration device, the second-stage nanofiltration device and the reverse osmosis device are all equipped with safety filters before entering the membrane.
[0034] The ceramic membrane device is provided with an online chemical cleaning device for cleaning the ceramic membrane, and the primary nanofiltration device, the secondary nanofiltration device and the reverse osmosis device are jointly provided with an online chemical cleaning device for cleaning the nanofiltration membrane and the reverse osmosis membrane.
[0035] The monitoring instrument is electrically connected to the raw material storage tank, filter press device, filter press device clear liquid storage tank, ceramic membrane device, ceramic membrane clear liquid storage tank, primary nanofiltration device, first primary nanofiltration concentrated liquid storage tank, second primary nanofiltration concentrated liquid storage tank, secondary nanofiltration device, nanofiltration permeate storage tank, reverse osmosis device, reverse osmosis clear liquid storage tank, and reverse osmosis concentrated liquid storage tank. The PLC controller is electrically connected to the booster delivery pump and two sets of online chemical cleaning devices.
[0036] The molecular weight of the ceramic membrane used in the ceramic membrane device is 150-250da, and the operating pressure of the ceramic membrane device is 0.24-0.26MPa. The operating pressure in the first-stage nanofiltration device is 1.7-2.0MPa, the operating pressure in the second-stage nanofiltration device is 1.8-2.0MPa, and the operating pressure of the reverse osmosis device is 3-5MPa.
[0037] The working principle and use process of the utility model are as follows: the mother liquor of itaconic acid with an itaconic acid content of 8.5g / 100ML in the raw material storage tank is transported to the filter press device through a booster pump for solid-liquid separation to obtain a filtrate, and the pressure of the filtration is 0.5MPa. The filtrate is sent to the ceramic membrane device through a booster delivery pump for filtration to remove suspended impurities in the mother liquor of itaconic acid, and a ceramic membrane clear liquid and a concentrated liquid are obtained, and the concentrated liquid is returned to the raw material storage tank.
[0038] The obtained ceramic membrane clear liquid with itaconic acid content of 8.5g / 100ML is transported to the ceramic membrane clear liquid storage tank, and then passed through the security filter for security filtration to obtain security filtrate, and the security filtrate is transported to the first-level nanofiltration device through a booster pump to obtain the first-level nanofiltration clear liquid with itaconic acid content of 8.08g / 100ML and the first-level nanofiltration concentrated liquid with itaconic acid content of 12.33g / 100ML. The operating pressure of the first-level nanofiltration device is 1.8MPa, and the first-level nanofiltration concentrated liquid with itaconic acid content of 12.33g / 100ML is transported to the first-level nanofiltration concentrated liquid storage tank or the second-level nanofiltration concentrated liquid storage tank, and replaced every one hour.
[0039] The reverse osmosis clear liquid with itaconic acid content of 0.13g / 100ML is transported to the storage tank that has collected the concentrate of the first-level nanofiltration device for one hour. The delivery amount of the reverse osmosis clear liquid is three times the flow rate of the first-level nanofiltration concentrate, and three times of water washing is performed. While using the reverse osmosis clear liquid to dilute the first-level nanofiltration concentrate, the diluted liquid in the first-level nanofiltration concentrate storage tank or the second-level nanofiltration concentrate storage tank is sent to the security filter through a booster delivery pump for security filtration to obtain a security filtrate.
[0040] The security filtrate is transported to the secondary nanofiltration device through a booster pump to obtain a secondary nanofiltration clear liquid with an itaconic acid content of 2.56g / 100ML and a secondary nanofiltration concentrate with an itaconic acid content of 2.64g / 100ML. The operating pressure of the secondary nanofiltration device is 2.0MPa. The secondary nanofiltration clear liquid and the primary nanofiltration clear liquid are collected together in a nanofiltration permeate storage tank. The small amount of concentrate produced by the secondary nanofiltration device is directly discharged to the wastewater collection system for unified treatment.
[0041] The nanofiltration clear liquid with itaconic acid content of 5.56g / 100ML in the nanofiltration permeate storage tank is transported to the security filter by a booster pump for security filtration to obtain security filtrate, and the security filtrate is transported to the reverse osmosis device by a booster pump to obtain reverse osmosis clear liquid with itaconic acid content of 0.13g / 100ML and reverse osmosis concentrated liquid with itaconic acid content of 25.85g / 100ML. The operating pressure of the first-level nanofiltration device is 4.5MPa. The reverse osmosis concentrated liquid is collected in the reverse osmosis concentrated liquid storage tank and transported to the evaporation system by the booster pump. The reverse osmosis clear liquid is collected in the reverse osmosis clear liquid storage tank, and a part of it is transported to the first-level nanofiltration concentrated liquid storage tank or the second-level nanofiltration concentrated liquid storage tank by the top wash water pump to dilute the first-level nanofiltration concentrated liquid, and the other part is transported by the booster pump to the flushing production system plate frame and other equipment.
[0042] The system's itaconic acid recovery rate is 98.1%, the operating temperature of the ceramic membrane device is 50°C, and the operating temperatures of the primary nanofiltration device, the secondary nanofiltration device and the reverse osmosis device are 45°C.
[0043] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. A membrane extraction and concentration system for itaconic acid recovery, characterized in that: Including raw material storage tank, filter press device, filter press device clear liquid storage tank, ceramic membrane device, ceramic membrane clear liquid storage tank, primary nanofiltration device, nanofiltration permeate storage tank, reverse osmosis device and reverse osmosis clear liquid storage tank; The raw material storage tank is connected to the filter press device, the filter press device is connected to the filter press device clear liquid storage tank, the filter press device clear liquid storage tank is connected to the filter press device clear liquid storage tank, the filter press device clear liquid storage tank is connected to the ceramic membrane device, the ceramic membrane device is connected to the ceramic membrane clear liquid storage tank, the ceramic membrane clear liquid storage tank is connected to the first-level nanofiltration device, the first-level nanofiltration device is connected to the nanofiltration permeate storage tank, the nanofiltration permeate storage tank is connected to the reverse osmosis device, and the reverse osmosis device is connected to the reverse osmosis clear liquid storage tank.
2. The membrane extraction and concentration system for itaconic acid recovery according to claim 1, characterized in that: The reverse osmosis device is connected to a reverse osmosis clear liquid storage tank, the reverse osmosis clear liquid storage tank is connected to a first-level nanofiltration concentrated liquid storage tank and a second-level nanofiltration concentrated liquid storage tank, the first-level nanofiltration device is connected to the first-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration concentrated liquid storage tank, and the first-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration concentrated liquid storage tank are connected to the second-level nanofiltration device.
3. The membrane extraction and concentration system for itaconic acid recovery according to claim 2, characterized in that: The first-stage nanofiltration concentrated liquid storage tank and the second-stage nanofiltration concentrated liquid storage tank are both connected to the secondary nanofiltration device.
4. The membrane extraction and concentration system for itaconic acid recovery according to claim 1, characterized in that: The outlet of the ceramic membrane device flows back to the delivery pipeline of the raw material storage tank, and a reflux automatic control valve is arranged on the delivery pipeline.
5. The membrane extraction and concentration system for itaconic acid recovery according to claim 2, characterized in that: The first-stage nanofiltration concentrated liquid storage tank and the second-stage nanofiltration concentrated liquid storage tank are used alternately.
6. The membrane extraction and concentration system for itaconic acid recovery according to claim 2, characterized in that: The permeates of the primary nanofiltration device and the secondary nanofiltration device are both collected in the nanofiltration permeate storage tank.
7. The membrane extraction and concentration system for itaconic acid recovery according to claim 2, characterized in that: A booster delivery pump is provided between the raw material storage tank and the filter press device, between the clear liquid storage tank of the filter press device and the ceramic membrane device, between the ceramic membrane clear liquid storage tank and the first-level nanofiltration device, between the first-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration device, between the second-level nanofiltration concentrated liquid storage tank and the second-level nanofiltration device, between the nanofiltration permeate storage tank and the reverse osmosis device, and between the reverse osmosis clear liquid storage tank and the first-level nanofiltration concentrated liquid storage tank.
8. The membrane extraction and concentration system for itaconic acid recovery according to claim 2, characterized in that: The ceramic membrane device, the primary nanofiltration device, the secondary nanofiltration device and the reverse osmosis device are all provided with a safety filter before entering the membrane.
9. The membrane extraction and concentration system for itaconic acid recovery according to claim 2, characterized in that: The ceramic membrane device is provided with an online chemical cleaning device for cleaning the ceramic membrane, and the primary nanofiltration device, the secondary nanofiltration device and the reverse osmosis device are jointly provided with an online chemical cleaning device for cleaning the nanofiltration membrane and the reverse osmosis membrane.