Pre-filter and desalted water reverse osmosis filtration system

Abstract

The utility model provides a pre-filter and a desalted water reverse osmosis filtration system, and relates to the technical field of desalted water filtration. The pre-filter comprises a shell, a partition piece for dividing the interior of the shell into an upper filter cavity and a lower drainage cavity is arranged, and a plurality of water passing holes for connecting the upper filter cavity and the lower drainage cavity are formed in the partition piece; the lower part of the outer side of the shell is connected with a water inlet and a water outlet; the filter element is arranged in the upper filter cavity; the lower part of the filter element is connected with the water passing hole, and the upper part is connected with the shell through a limiting assembly; the end cover is detachably connected to the top of the shell; the dismounting auxiliary mechanism is used for adjusting the relative position of the end cover and the shell; the side surface of the filter element is corrugated; the limiting assembly is used for circumferentially limiting the filter element. The desalted water reverse osmosis filtering system comprises a desalted water reverse osmosis filtering device and the pre-filter. The limiting assembly circumferentially limits the filter element, and compared with an original mode of applying longitudinal acting force, the filter element is not prone to deformation.

Description

Technical Field

[0001] The utility model relates to the technical field of desalted water filtration, in particular to a pre-filter and a desalted water reverse osmosis filtration system. Background Art

[0002] A pre-filter is connected to the front end of a desalted water reverse osmosis filtration device. The housing of the existing pre-filter includes upper and lower parts connected by 22 ordinary bolts, and the connection part of these two parts is located in the middle of the housing (waist-style); 39 filter elements are installed inside the housing, and the filtration accuracy of the filter elements is 5μm to prevent particulate matter and microorganisms above 5μm from entering the reverse osmosis membrane.

[0003] The existing pre-filter has the following defects:

[0004] 1. Since the number of filter elements is large, in order to facilitate installation, these filter elements are fixed by applying downward pressure through a gland. During operation, the filter elements are prone to deformation, resulting in impurities entering the subsequent desalted water reverse osmosis filtration device due to poor sealing, affecting the reverse osmosis water quality and damaging the reverse osmosis membrane.

[0005] 2. The existing filter elements are columnar structures, and their sides (filtration surfaces) are relatively smooth, with a small filtration area and a short filter element life, so the filter elements need to be replaced frequently (3-4 times a month).

[0006] 3. The upper and lower parts of the filter housing are connected by 22 ordinary bolts. Four people are required to cooperate (lift and lower) to disassemble and assemble the upper part of the housing. Two people are required to disassemble and assemble the filter elements, which takes 2.5 hours, is time-consuming and laborious, and there is also a risk of the upper part of the housing falling and injuring people.

[0007] The information disclosed in this background art section is only intended to deepen the understanding of the overall background art of the present utility model, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art. Summary of the Utility Model

[0008] In view of the above situation, the present utility model provides a pre-filter and a desalted water reverse osmosis filtration system, aiming to solve at least one of the defects pointed out in the above background art.

[0009] To achieve the above object, the present utility model provides the following technical solutions:

[0010] In a first aspect, the present utility model provides a pre-filter, comprising:

[0011] A housing is provided with a partition that divides the interior of the housing into an upper filtration chamber and a lower drainage chamber. A number of water passing holes for connecting the upper filtration chamber and the lower drainage chamber are provided on the partition. The lower part of the outer side of the housing is connected with a water inlet and a water outlet. One end of the water inlet is connected to the partition and communicates with the upper filtration chamber. One end of the water outlet is connected to the lower drainage chamber, and the other end is used for connecting to the inlet of a desalinated water reverse osmosis filtration device.

[0012] A filter element is arranged in the upper filtration chamber. The lower part of the filter element is connected to the water passing holes, and the upper part is connected to the housing through a limiting component.

[0013] An end cover is detachably connected to the top of the housing.

[0014] A disassembly and assembly assisting mechanism is used to adjust the relative position between the end cover and the housing.

[0015] Among them, the side surface of the filter element is corrugated. The limiting component is used for circumferentially limiting the filter element.

[0016] In some embodiments of the present invention, the limiting component includes a limiting ring connected to the inner wall of the housing through a bracket, and the limiting ring is sleeved on the filter element.

[0017] In some embodiments of the present invention, the disassembly and assembly assisting mechanism includes:

[0018] A mounting seat is arranged on the outer wall of the housing.

[0019] A rotating support arm is used to adjust the lateral distance between the end cover and the top of the housing.

[0020] A lifting member is used to adjust the longitudinal distance between the end cover and the top of the housing.

[0021] In some embodiments of the present invention, the rotating support arm includes a vertical section and a horizontal section connected to each other. The lower end of the vertical section is rotatably connected to the mounting seat, and the vertical section can rotate around its own axis. The lifting member is threadedly connected to the horizontal section.

[0022] In some embodiments of the present invention, the end cover and the housing are connected by quick-release bolts.

[0023] In some embodiments of the present invention, there are three filter elements.

[0024] In some embodiments of the present invention, the diameter of the filter element is 40 inches.

[0025] In some embodiments of the present invention, a connecting pipe is connected to the top of the water passing hole, and the lower part of the filter element is sleeved on the connecting pipe.

[0026] In some embodiments of the present utility model, a sealing ring is provided between the connecting pipe and the filter element.

[0027] In a second aspect, the present utility model provides a desalted water reverse osmosis filtration system, including a desalted water reverse osmosis filtration device and the above-mentioned pre-filter.

[0028] The embodiments of the present utility model have at least the following advantages or beneficial effects:

[0029] First, by adding a disassembly and assembly auxiliary mechanism, on the one hand, the operation of four people lifting the end cover up and down when disassembling and assembling the end cover is saved, the efficiency is improved, and the labor cost is reduced. On the other hand, the situation of the end cover falling and hurting people is not likely to occur, and the safety during operation is improved.

[0030] Second, the limiting component circumferentially limits the filter element to restrict the lateral movement of the filter element for positioning the filter element. Compared with the original method of applying a longitudinal force, the filter element is not easily deformed, and impurities are not easily introduced into the subsequent desalted water reverse osmosis filtration device, thereby increasing the service life of the reverse osmosis membrane and reducing the dosage of the cleaning agent for the reverse osmosis membrane. The annual cost savings for cleaning agents is: 6 times / year × 300 kg / time × 53.8 yuan / kg = 96,800 yuan / year.

[0031] Third, the side surface of the filter element is corrugated or folded to increase the filtration area of the filter element, extend the service life of the filter element, reduce the replacement frequency of the filter element, thereby reducing the usage cost of the filter element. The annual cost savings for filter elements is: 125,000 yuan / year.

[0032] Other features and advantages of the present utility model will be described in the subsequent description, and some of them will become obvious from the description or can be understood by implementing the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is a schematic structural diagram of the pre-filter;

[0035] Figure 2 It is a schematic structural diagram of the limiting component.

[0036] Icon: 1 - housing, 11 - separator, 111 - water passing hole, 112 - connecting pipe, 12 - upper filtration chamber, 13 - lower drainage chamber, 14 - water inlet, 15 - water outlet, 16 - quick - fitting bolt, 2 - filter element, 21 - bracket, 22 - limiting ring, 3 - end cover, 41 - mounting seat, 42 - rotating support arm, 421 - vertical section, 422 - horizontal section, 43 - lifting member. Detailed implementation mode

[0037] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention.

[0038] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "vertical", "horizontal", "top", "inner", "outer", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present invention.

[0039] In addition, the meaning of the term "a number of" is one or more than one, unless otherwise specifically and clearly defined.

[0040] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium. It can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the embodiments of the present invention can be understood according to specific situations.

[0041] The embodiments of the present invention will be described in detail below with reference to the drawings.

[0042] Embodiment

[0043] See Figures 1 - 2 , this embodiment provides a desalinated water reverse osmosis filtration system, including a desalinated water reverse osmosis filtration device (not shown in the figure) and a pre - filter. The inlet of the desalinated water reverse osmosis filtration device is connected to the water outlet 15 of the pre - filter.

[0044] The pre - filter includes a housing 1, a filter element 2, an end cover 3, and a disassembly and assembly assistance mechanism.

[0045] A partition member 11 is provided at the lower inner side of the housing 1. The partition member 11 divides the interior of the housing 1 into an upper filtration chamber 12 and a lower drainage chamber 13. A number of water passing holes 111 for connecting the upper filtration chamber 12 and the lower drainage chamber 13 are provided on the partition member 11. An inlet 14 and an outlet 15 are connected to the lower outer side of the housing 1. One end of the inlet 14 is connected to the partition member 11 and communicates with the upper filtration chamber 12. One end of the outlet 15 is connected to the lower drainage chamber 13, and the other end is for connecting to the inlet of the desalinated water reverse osmosis filtration device. The inlet 14, the upper filtration chamber 12, the water passing holes 111, the lower drainage chamber 13, and the outlet 15 are connected in sequence.

[0046] In this embodiment, three water passing holes 111 are evenly distributed on the partition member 11.

[0047] The filter element 2 is arranged in the upper filtration chamber 12. The filter element 2 is tubular. The lower part of the filter element 2 is connected to the water passing holes 111, and the upper part is connected to the housing 1 through a limiting component. The limiting component is used for circumferentially limiting the filter element 2. The limiting component includes a limiting ring 22 connected to the inner wall of the housing 1 through a bracket 21, and the limiting ring 22 is sleeved on the filter element 2.

[0048] In this embodiment, there are three filter elements 2. Three filter elements 2 with a diameter of 40 inches (101.6 cm) are installed in the housing 1 (previously, 39 small-diameter filter elements 2 were used). The side surface of the filter element 2 is corrugated or folded to increase the filtration area of the filter element 2, extend the service life of the filter element 2, and reduce the replacement frequency of the filter element 2.

[0049] In this embodiment, a connecting pipe 112 is connected to the top of the water passing hole 111, and the lower part of the filter element 2 is sleeved on the connecting pipe 112. In order to ensure the sealing effect, a sealing ring is provided between the connecting pipe 112 and the filter element 2.

[0050] The end cover 3 is detachably connected to the top of the housing 1 by 10 quick-release bolts 16 ( Figure 1 only 1 is shown), which makes the disassembly and assembly of the end cover 3 more convenient.

[0051] The disassembly and assembly auxiliary mechanism is used to adjust the relative position between the end cover 3 and the housing 1. The disassembly and assembly auxiliary mechanism includes a mounting seat 41, a rotating arm 42, and a lifting member 43.

[0052] The mounting seat 41 is arranged on the outer wall of the housing 1.

[0053] The rotating arm 42 is used to adjust the horizontal distance between the end cover 3 and the top of the housing 1. The rotating arm 42 includes a vertical section 421 and a horizontal section 422 connected to each other. The lower end of the vertical section 421 is rotatably connected to the mounting seat 41, and the vertical section 421 can rotate around its own axis.

[0054] The lifting member 43 is used to drive the end cover 3 to move longitudinally to adjust the longitudinal distance between the end cover 3 and the top of the housing 1. The lifting member 43 is vertically arranged. The lower end of the lifting member 43 is connected to the top of the end cover 3, and the upper part of the lifting member 43 is threadedly connected to the horizontal section 422.

[0055] The working principle of the disassembly and assembly auxiliary mechanism is as follows: When disassembling the end cover 3, first remove 10 quick-install bolts 16, then drive the end cover 3 to move upward through the lifting member 43, and then adjust the lateral distance between the end cover 3 and the top of the housing 1 by rotating the support arm 42 to stagger the end cover 3 from the top of the housing 1 to facilitate the replacement of the filter element 2. When installing the end cover 3, just operate in the reverse direction.

[0056] Combined with the above content, compared with the original equipment, this embodiment has at least the following beneficial effects:

[0057] First, by adding the disassembly and assembly auxiliary mechanism, on the one hand, it saves the operation of four people lifting the end cover 3 up and down when disassembling and assembling the end cover 3, improves the efficiency and reduces the labor cost. On the other hand, it is not easy to have the situation of the end cover 3 falling and hurting people, improving the safety during operation.

[0058] Second, the limiting component circumferentially limits the filter element 2 to restrict the lateral movement of the filter element 2 to position the filter element 2. Compared with the original method of applying longitudinal force, the filter element 2 is not easy to deform, and impurities are not easy to enter the subsequent desalinated water reverse osmosis filtration device, thereby increasing the service life of the reverse osmosis membrane and reducing the dosage of the cleaning agent for the reverse osmosis membrane. The annual savings in cleaning agent costs: 6 times / year × 300 kg / time × 53.8 yuan / kg = 96,800 yuan / year.

[0059] Third, the side surface of the filter element 2 is corrugated or folded to increase the filtration area of the filter element 2, extend the service life of the filter element 2, reduce the replacement frequency of the filter element 2, thereby reducing the usage cost of the filter element 2. The annual savings in filter element 2 costs: 125,000 yuan / year.

[0060] Fourth, three filter elements 2 with a diameter of 40 inches (101.6 cm) are installed in the housing 1 (previously, 39 small-diameter filter elements 2 were used). By reducing the number of filter elements 2, the disassembly and assembly of the filter elements 2 become simpler and more convenient.

[0061] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Without conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pre-filter, characterized in that: include: The housing is provided with a partition that divides the housing into an upper filter chamber and a lower drainage chamber, and the partition is provided with a plurality of water holes for connecting the upper filter chamber and the lower drainage chamber; the lower outer portion of the housing is connected with a water inlet and a water outlet, one end of the water inlet is connected to the partition and communicates with the upper filter chamber, one end of the water outlet is connected to the lower drainage chamber, and the other end is used to be connected to the inlet of the desalted water reverse osmosis filtration device; A filter element is arranged in the upper filter cavity; the lower part of the filter element is connected to the water hole, and the upper part is connected to the housing through a limit assembly; an end cover, detachably connected to the top of the shell; A disassembly and assembly auxiliary mechanism, used for adjusting the relative position of the end cover and the housing; Wherein, the side surface of the filter element is corrugated; the limiting component is used to limit the circumferential position of the filter element.

2. The pre-filter according to claim 1, characterized in that: The limiting assembly comprises a limiting ring connected to the inner wall of the shell through a bracket, and the limiting ring is sleeved with the filter element.

3. The pre-filter according to claim 1, characterized in that: The disassembly and assembly auxiliary mechanism comprises: A mounting seat, arranged on the outer wall of the shell; A rotating support arm is used to adjust the lateral spacing between the end cover and the top of the shell; A lifting member is used to adjust the longitudinal distance between the end cover and the top of the shell.

4. The pre-filter according to claim 3, characterized in that: The rotating support arm comprises a vertical section and a horizontal section which are connected to each other; the lower end of the vertical section is rotatably connected to the mounting seat, and the vertical section can rotate around its own axis; the lifting member is threadedly connected to the horizontal section.

5. The pre-filter according to claim 1, characterized in that: The end cover is connected to the housing via quick-release bolts.

6. The pre-filter according to claim 1, characterized in that: There are three filter elements.

7. The pre-filter according to claim 6, characterized in that: The filter element has a diameter of 40 inches.

8. The pre-filter according to any one of claims 1 to 7, characterized in that: The top of the water hole is connected with a connecting pipe, and the lower part of the filter element is sleeved with the connecting pipe.

9. The pre-filter according to claim 8, characterized in that: A sealing ring is arranged between the connecting pipe and the filter element.

10. A desalted water reverse osmosis filtration system, characterized in that: The invention comprises a desalted water reverse osmosis filtration device and a pre-filter as claimed in any one of claims 1 to 9.

Images