Nanofiltration equipment for producing chemical raw materials

Abstract

The utility model discloses nanofiltration equipment for producing chemical raw materials, which comprises a machine body, the machine body comprises an oil removal tank, a security filter, a nanofiltration filtering device, a high-pressure water pump and a back-flushing cleaning guide pipe, two groups of nanofiltration cylinders are arranged in the nanofiltration filtering device, and two layers are arranged in each of a first nanofiltration cylinder and a second nanofiltration cylinder. The outer layer is provided with a coarse filtering layer and an inner nanofiltration membrane layer; two water inlet ports and two water outlet ports are formed in the upper side and the lower side of each of the nanofiltration cylinder II and the nanofiltration cylinder I; the nanofiltration cylinders II and the nanofiltration cylinder I are connected and communicated with a back-flushing cleaning guide pipe; according to the design, a stock solution to be subjected to nanofiltration can be subjected to ultrafiltration through the outer ceramic membrane layer, the activated carbon layer and the inner ceramic layer on the outer layer of the nanofiltration filtering device, and then nanofiltration is performed through the nanofiltration membrane layer, so that the nanofiltration efficiency can be improved, the interior of the nanofiltration cylinder can be washed forwards and directionally by turns through the back-flushing cleaning guide pipe, and the nanofiltration efficiency is improved. Impurities on the membrane can be washed away, and the service life of nanofiltration is prolonged.

Description

Technical Field

[0001] The utility model relates to nanofiltration equipment for producing chemical raw materials, belonging to the field of valves. Background Art

[0002] Nanofiltration is a pressure-driven membrane separation process between reverse osmosis and ultrafiltration. The pore size of the nanofiltration membrane is in the range of several nanometers. Nanofiltration is used to separate substances with relatively small molecular weight, such as inorganic salts or small molecular organic substances such as glucose and sucrose, from solvents. Nanofiltration, also known as low-pressure reverse osmosis, is an emerging field of membrane separation technology. Its separation performance is between reverse osmosis and ultrafiltration, allowing some inorganic salts and certain solvents to pass through the membrane, thereby achieving the separation effect.

[0003] During the nanofiltration process of the nanofiltration equipment, when the treated raw liquid enters the nanofiltration membrane directly from the water pump for nanofiltration, the nanofiltration membrane directly filters the raw liquid, and a large amount of impurities will remain on the membrane, resulting in reduced nanofiltration efficiency and affecting the service life of the nanofiltration membrane, which is quite troublesome. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a nanofiltration device for the production of chemical raw materials, so as to solve the problem that during the nanofiltration process of the nanofiltration equipment, when the treated raw liquid directly enters the nanofiltration membrane from the water pump for nanofiltration, the nanofiltration membrane directly filters the raw liquid, and a large amount of impurities will remain on the membrane, resulting in reduced nanofiltration efficiency and affecting the service life of the nanofiltration membrane.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a nanofiltration equipment for the production of chemical raw materials, including a body, characterized in that the body includes an oil removal tank, a security filter, a nanofiltration filtering device, a high-pressure water pump, and a backwash cleaning duct. The oil removal tank is connected to the security filter through a duct, the security filter is connected to the high-pressure water pump through a duct, and the high-pressure water pump is connected to the nanofiltration filtering device through a duct. Two groups of nanofiltration cartridges are arranged inside the nanofiltration filtering device, namely nanofiltration cartridge one and nanofiltration cartridge two with the same structure. Two layers are arranged inside the nanofiltration cartridge one and nanofiltration cartridge two, the outer layer is arranged as a coarse filtration layer and the inner layer is a nanofiltration membrane layer. The nanofiltration cartridge two and nanofiltration cartridge one are both provided with two water inlet ports and two water outlet ports on the upper and lower sides and are connected to the backwash cleaning duct and communicate with each other.

[0006] Furthermore, the coarse filtration layer is provided with three layers, namely an outer ceramic membrane layer, an activated carbon layer, and an inner ceramic layer.

[0007] Furthermore, the outer ceramic membrane layer, the activated carbon layer and the inner ceramic layer are tightly attached together to form a main body, which is arranged between a surface wall of the nanofiltration cartridge and the nanofiltration membrane layer.

[0008] Furthermore, the backwash cleaning conduit includes an upper conduit and a lower conduit, wherein both ends of the upper conduit are respectively connected to two water inlet ports and are interconnected, and the lower conduit is respectively connected to two water outlet ports and are interconnected, and one end of the lower conduit is connected to a drainage end.

[0009] Furthermore, electronic valves are provided at the connection points between the upper conduit, the lower conduit, the water inlet port and the water outlet port.

[0010] Furthermore, the de-oiling tank comprises a water inlet, a water outlet, and an oil drain port. Two partition plates are arranged inside the de-oiling tank, namely a left partition plate and a right partition plate. An electronic valve for recovering raw liquid is arranged at the bottom of the de-oiling tank.

[0011] Furthermore, the oil drain port is arranged at the top between the left partition plate and the right partition plate.

[0012] Beneficial Effects

[0013] The utility model discloses a nanofiltration device for producing chemical raw materials, which can firstly perform ultrafiltration on a raw liquid to be nanofiltered through an outer ceramic membrane layer, an activated carbon layer and an inner ceramic layer of an outer layer of a nanofiltration filtering device, and then perform nanofiltration through the nanofiltration membrane layer, thereby improving the nanofiltration efficiency; moreover, a backwash cleaning conduit can be used to alternately flush the inside of a nanofiltration cartridge in a forward direction and a reverse direction, thereby washing away impurities on the membrane and improving the service life of the nanofiltration. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0015] Figure 1 This is a schematic diagram of the main structure of a nanofiltration device for producing chemical raw materials according to the utility model;

[0016] Figure 2 This is a schematic diagram of the de-oiling tank structure of a nanofiltration device for producing chemical raw materials according to the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of a nanofiltration device of a nanofiltration device for producing chemical raw materials according to the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of a nanofiltration membrane layer and a coarse filtration layer of a nanofiltration device for producing chemical raw materials according to the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of a nanofiltration cartridge for a nanofiltration device for producing chemical raw materials according to the utility model.

[0020] In the figure: body, oil removal tank, security filter, nanofiltration device, high-pressure water pump, backwash cleaning duct, left partition plate and right partition plate, oil drain port, water inlet, water outlet, raw liquid recovery electronic valve, nanofiltration cartridge one, nanofiltration cartridge two, raw liquid inlet end, permeate outlet end, concentrated liquid drainage end, upper duct, electronic valve, lower duct, outlet port, coarse filtration layer, inner nanofiltration membrane layer, outer ceramic membrane layer, activated carbon layer, inner ceramic layer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] Example

[0023] like Figure 1-5As shown, a nanofiltration device for producing chemical raw materials includes a body 1, characterized in that the body 1 includes an oil removal tank 11, a security filter 12, a nanofiltration filtering device 13, a high-pressure water pump 14, and a backwash cleaning conduit 15, the oil removal tank 11 is connected to the security filter 12 through a conduit, the security filter 12 is connected to the high-pressure water pump 14 through a conduit, the high-pressure water pump is connected to the nanofiltration filtering device 13 through a conduit, and two groups of nanofiltration cartridges are arranged inside the nanofiltration filtering device 13, namely, nanofiltration cartridge 1 131 and nanofiltration cartridge 2 132, and the structures are consistent, the nanofiltration cartridge 1 131 and the nanofiltration cartridge 2 132 are both arranged with two layers, the outer layer is set as a coarse filtration layer 1312 and an inner nanofiltration membrane layer 1313, the Nanofiltration cartridge 2 132 and nanofiltration cartridge 1 131 are both provided with two water inlet ports 1332 and two water outlet ports 1311 on the upper and lower sides, and are connected to the backwash cleaning duct 15 and are interconnected; in the above process, the residual grease after pretreatment can be first removed by the oil removal tank, and then further filtered by the security filter 12, and pressurized by the high-pressure water pump 14. After the raw liquid enters the nanofiltration filtration device 13, it will first pass through the coarse filtration layer 1312 for ultrafiltration, and then pass through the nanofiltration membrane layer 1313 for nanofiltration, which can improve the efficiency of nanofiltration and the service life of the nanofiltration membrane. Furthermore, the backwash cleaning duct 15 can be used to flush the inside of the nanofiltration cartridge in the forward and reverse directions to wash away the impurities on the membrane.

[0024] In this embodiment, the coarse filtration layer 1312 is provided with three layers, namely, an outer ceramic membrane layer a1, an activated carbon layer a2, and an inner ceramic layer a3. The above can be ultrafiltered through the outer ceramic membrane layer a1, the activated carbon layer a2, and the inner ceramic layer a3, first filtering out impurities with a pore size greater than 2-20nm, which is beneficial to improving the nanofiltration efficiency and service life.

[0025] In this embodiment, the outer ceramic membrane layer a1, the activated carbon layer a2, and the inner ceramic layer a3 are tightly attached together and constitute a main body, which is arranged between the surface wall of the nanofiltration cartridge 131 and the nanofiltration membrane layer 1313. The above can make the raw liquid preferentially pass through the outer ceramic membrane layer a1, the activated carbon layer a2, and the inner ceramic layer a3 after entering.

[0026] In this embodiment, the backwash cleaning duct 15 includes an upper duct 151 and a lower duct 153. The two ends of the upper duct 151 are respectively connected to the two water inlet ports 1332 and are interconnected. The lower duct 153 is respectively connected to the two water outlet ports 1311 and are interconnected, and one end of the lower duct 153 is connected to the drainage end. The above can be connected to the water inlet pipe through the backwash cleaning duct 15, and then the water inlet port 1332 and the water outlet port 1311 are controlled by controlling the electronic valve 152 to achieve cross-hedging, which can physically flush some impurities on the surface of the nanofiltration membrane.

[0027] In this embodiment, electronic valves 152 are provided at the connection between the upper conduit 151 , the lower conduit 153 and the water inlet port 1332 , the water outlet port 1311 , and the electronic valves 152 are used to control the opening and closing of the water inlet port 1332 , the water outlet port 1311 .

[0028] In this embodiment, the de-oiling tank 11 includes a water inlet 114, a water outlet 115, and an oil drain port 113. Two partitions are arranged inside the de-oiling tank 11, namely a left partition 111 and a right partition 112. A raw liquid recovery electronic valve 116 is arranged at the bottom of the de-oiling tank 11, which can be used to remove grease remaining on the surface of the raw liquid after pretreatment, and the raw liquid recovery electronic valve 116 is used to recover the raw liquid remaining in the de-oiling tank 11.

[0029] In this embodiment, the oil drain port 113 is set at the top between the left partition plate 111 and the right partition plate 112. Since the oil floats above the water and the left partition plate 111 is higher than the bottom of the right partition plate 112, after the raw liquid enters from the water inlet 114, the oil will be discharged through the oil drain port 113, and the raw liquid will be discharged through the water outlet 115.

[0030] Working principle:

[0031] When in use, the original liquid is first pumped into the oil removal tank by a water pump to recover the residual grease after pretreatment. This is because the oil will float on the water, and the left partition plate 111 is higher than the bottom of the right partition plate 112. Therefore, after the original liquid enters from the water inlet 114, the oil will be discharged through the oil discharge port 113, and the original liquid will be discharged through the water outlet 115. The discharged original liquid will enter the security filter 12 for further filtration, and then be pressurized by the high-pressure water pump 14. The original liquid is set from the original liquid inlet. After entering the nanofiltration device 13, the water end 133 will first be ultrafiltered through the outer ceramic membrane layer a1, the activated carbon layer a2, and the inner ceramic layer a3 to filter out impurities with a pore size greater than 2-20nm, and then pass through the nanofiltration membrane layer 1313 for nanofiltration. After the nanofiltration, the filtered permeate is discharged through the set permeate outlet 134, and the unfiltered concentrate is discharged from the set concentrate drainage end 135, which can improve the efficiency of nanofiltration and the service life of the nanofiltration membrane. Moreover, it can also be backwashed and cleaned. The wash conduit 15 performs forward and reverse cross-type flushing on the inside of the nanofiltration cartridge. Water is introduced through the water inlet pipe 154 provided at the top of the upper conduit 151, and then the water inlet port 1332 on the left side and the water outlet port 1311 on the right side of the nanofiltration cartridge are opened through the electronic valve 152 for forward flushing. After flushing, the water inlet port 1332 on the left side and the water outlet port 1311 on the right side are closed, and the water inlet port 1332 on the right side and the water outlet port 1311 on the left side are opened for lower flushing. The port 1311 is connected to the concentrated liquid drainage end 135, so the flushing water will be discharged from the concentrated liquid drainage end 135; this design can first ultrafilter the raw liquid to be nanofiltered through the outer ceramic membrane layer a1, the activated carbon layer a2, and the inner ceramic layer a3 of the outer layer of the nanofiltration filtration device, and then perform nanofiltration through the nanofiltration membrane layer, which can improve the nanofiltration efficiency. Furthermore, the backwash cleaning catheter can be used to alternately flush the inside of the nanofiltration cartridge in the forward and reverse directions, which can wash away the impurities on the membrane and increase the service life of the nanofiltration.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] The control method of the present invention is to control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A nanofiltration device for producing chemical raw materials, comprising a body (1), characterized in that: The machine body (1) comprises an oil removal tank (11), a security filter (12), a nanofiltration device (13), a high-pressure water pump (14), and a backwash cleaning conduit (15). The oil removal tank (11) is connected to the security filter (12) via a conduit. The security filter (12) is connected to the high-pressure water pump (14) via a conduit. The high-pressure water pump is connected to the nanofiltration device (13) via a conduit. Two groups of nanofiltration cartridges are arranged inside the nanofiltration device (13), namely, Nanofiltration cartridge 1 (131) and nanofiltration cartridge 2 (132) have the same structure. Both nanofiltration cartridge 1 (131) and nanofiltration cartridge 2 (132) are provided with two layers inside, with the outer layer being a coarse filtration layer (1312) and the inner layer being a nanofiltration membrane layer (1313). Both nanofiltration cartridge 2 (132) and nanofiltration cartridge 1 (131) are provided with two water inlet ports (1332) and two water outlet ports (1311) on the upper and lower sides and are connected to a backwash cleaning conduit (15) and are in communication with each other.

2. The nanofiltration equipment for producing chemical raw materials according to claim 1, characterized in that: The coarse filtration layer (1312) is provided with three layers, namely an outer ceramic membrane layer (a1), an activated carbon layer (a2), and an inner ceramic layer (a3).

3. The nanofiltration equipment for producing chemical raw materials according to claim 2, characterized in that: The outer ceramic membrane layer (a1), the activated carbon layer (a2), and the inner ceramic layer (a3) ​​are tightly attached together to form a main body, which is arranged between the surface wall of the nanofiltration cartridge (131) and the nanofiltration membrane layer (1313).

4. The nanofiltration equipment for producing chemical raw materials according to claim 1, characterized in that: The backwash cleaning conduit (15) comprises an upper conduit (151) and a lower conduit (153); two ends of the upper conduit (151) are respectively connected to two water inlet ports (1332) and are in communication with each other; the lower conduit (153) is respectively connected to two water outlet ports (1311) and are in communication with each other; and one end of the lower conduit (153) is connected to a drainage end.

5. The nanofiltration equipment for producing chemical raw materials according to claim 4, characterized in that: Electronic valves (152) are provided at the connection points between the upper conduit (151), the lower conduit (153), the water inlet port (1332), and the water outlet port (1311).

6. The nanofiltration equipment for producing chemical raw materials according to claim 1, characterized in that: The de-oiling tank (11) comprises a water inlet (114), a water outlet (115), and an oil discharge port (113); two partition plates are arranged inside the de-oiling tank (11), namely a left partition plate (111) and a right partition plate (112); and a raw liquid recovery electronic valve (116) is arranged at the bottom of the de-oiling tank (11).

7. The nanofiltration equipment for producing chemical raw materials according to claim 6, characterized in that: The oil drain port (113) is arranged at the top between the left partition plate (111) and the right partition plate (112).

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