High-salt-content wastewater pretreatment filtering device based on hot-method membrane

Abstract

The utility model discloses a high-salt-content wastewater pretreatment filtering device based on a hot method membrane, which relates to the technical field of water treatment equipment and comprises a water delivery pipeline, a fixed ring and a movable ring which are horizontally coaxial are arranged in the water delivery pipeline, and the peripheral wall of the movable ring is in sealed sliding connection with the inner wall of the water delivery pipeline through a sealing ring. A driving assembly is arranged on the fixed ring, the driving assembly is connected with the movable ring and used for driving the movable ring to slide in the water conveying pipeline, a filter screen is arranged on an inner hole of the fixed ring, and a backflushing water inlet pipe is arranged on the fixed ring. According to the utility model, the back-flushing drain pipe and the back-flushing water inlet pipe are respectively arranged on the upper and lower sides of the filter screen, so that the filter screen can be back-flushed in the water conveying pipeline and can be cleaned without disassembling the filter screen, and therefore, the service life of the filter screen is prolonged, and the influence of the cleaning action of the filter screen on the pretreatment and filtration of a water body is reduced.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment technology, specifically to a high-salinity wastewater pretreatment filtration device based on a thermal membrane. Background Technology

[0002] Thermal membrane water treatment is a technology that uses heat energy to drive a membrane separation process. This process heats the wastewater to increase the activity and separability of pollutants, and then utilizes the selective permeability of the membrane to separate the pollutants from the water. This process combines the advantages of both thermal treatment and membrane separation, improving treatment efficiency while reducing energy consumption.

[0003] Pretreatment filtration devices are an important part of the thermal membrane treatment process. By pretreatment, water quality is optimized, the risk of fouling in subsequent thermal membrane processes (such as membrane distillation and membrane crystallization) is reduced, and the overall treatment efficiency is improved.

[0004] Traditional pretreatment filtration devices are prone to impurities adhering to the filter screen surface during use, which reduces the lifespan of the filter screen and requires regular removal and replacement of the filter screen, which can also have a certain impact on the water treatment process. Utility Model Content

[0005] This utility model addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the purpose of this utility model is to provide a high-salinity wastewater pretreatment filtration device based on a thermal membrane, thereby solving the problems mentioned in the background art where impurities easily adhere to the filter screen surface during use, reducing the filter screen's lifespan and requiring regular removal and replacement, which also affects the water treatment process.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-salinity wastewater pretreatment filtration device based on a thermal membrane, comprising a water supply pipe, wherein a horizontally coaxial fixed ring and a movable ring are provided inside the water supply pipe, and the outer peripheral wall of the movable ring is slidably and sealingly connected to the inner wall of the water supply pipe through a sealing ring;

[0007] A driving assembly is provided on the fixed ring, and the driving assembly is connected to the moving ring to drive the moving ring to slide within the water supply pipe. A filter screen is provided on the inner hole of the fixed ring, and a backwash inlet pipe is provided on the fixed ring. One end of the backwash inlet pipe is connected to an external high-pressure water pipe, and the other end is located downstream of the filter screen. A backwash drain pipe is provided on the water supply pipe upstream of the filter screen, and the peripheral wall of the moving ring slides in contact with the inlet of the backwash drain pipe.

[0008] Preferably, the drive assembly includes a guide groove on the fixed ring, the guide groove being oriented toward the moving ring, and the backwash water inlet pipe communicating with the guide groove. A guide rod is connected to the side wall of the moving ring, and the other end of the guide rod extends into the guide groove.

[0009] The guide rod is in sealed sliding contact with the guide groove. A spring is connected between the guide rod and the guide groove wall. A water inlet pipe is connected to the guide groove wall. The other end of the water inlet pipe extends to the outside of the water supply pipe and is connected to an external high-pressure water pipe.

[0010] Preferably, multiple guide grooves are provided, and the multiple guide grooves are connected by a connecting pipe.

[0011] Preferably, the filter screen includes a fixed cylinder, which is movably installed in the inner hole of the fixed ring via a sealing ring;

[0012] A filter cartridge is connected to the fixed cylinder, and the peripheral wall of the filter cartridge is directly opposite the backwash inlet pipe.

[0013] Preferably, a sealing block capable of sealing the inner hole of the moving ring is provided inside the water supply pipeline, and the moving ring is in sliding contact with the sealing block;

[0014] The backwash drain pipe is located between the sealing block and the filter screen.

[0015] Preferably, the fixing ring is detachably installed from the water supply pipe, and a sealing ring is provided between the fixing ring and the inner wall of the water supply pipe.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. In this utility model, a backwash drain pipe and a backwash inlet pipe are respectively provided on the upstream and downstream sides of the filter screen, which can backwash the filter screen inside the water supply pipeline. The filter screen can be cleaned without disassembling it, thereby improving the service life of the filter screen and reducing the impact of the filter screen cleaning action on the water pretreatment filtration.

[0018] 2. In this utility model, before backwashing the filter screen, the front end of the water supply pipe can be blocked so that the backwash water can be discharged through the separately provided backwash drain pipe 7, thereby directly discharging impurities from the water supply pipe and preventing impurities from flowing back to the front end of the water supply pipe. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a schematic diagram of the structure of the filter screen during backwashing in this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the fixing ring in this utility model;

[0023] In the picture:

[0024] 1. Water supply pipeline; 2. Moving ring; 3. Sealing block; 4. Fixed ring;

[0025] 5. Drive assembly, 501 guide groove, 502 guide rod, 503 spring, 504 water inlet pipe, 505 connecting pipe;

[0026] 6. Backflush inlet pipe; 7. Backflush outlet pipe;

[0027] 8. Filter screen, 801. Fixed cylinder, 802. Filter cartridge. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1 As shown, this utility model provides a technical solution: a high-salinity wastewater pretreatment filtration device based on a thermal membrane, including a water supply pipe 1, and a horizontally coaxial fixed ring 4 and a movable ring 2 are arranged inside the water supply pipe 1. The outer peripheral wall of the movable ring 2 is slidably connected to the inner wall of the water supply pipe 1 through a sealing ring.

[0030] A drive assembly 5 is provided on the fixed ring 4. The drive assembly 5 is connected to the moving ring 2 and is used to drive the moving ring 2 to slide inside the water supply pipe 1. A filter screen 8 is provided on the inner hole of the fixed ring 4. A backwash inlet pipe 6 is provided on the fixed ring 4. One end of the backwash inlet pipe 6 is connected to an external high-pressure water pipe, and the other end is located downstream of the filter screen 8. A backwash drain pipe 7 is provided on the water supply pipe 1 upstream of the filter screen 8. The periphery of the moving ring 2 slides in contact with the opening of the backwash drain pipe 7. The backwash drain pipe 7 is connected to the water supply pipe 1 only when the moving ring 2 is driven away from the backwash drain pipe 7 by the drive assembly 5.

[0031] In this embodiment, refer to Figure 2As shown, the drive assembly 5 includes a guide groove 501 opened on the fixed ring 4, and the guide groove 501 is set towards the moving ring 2. The backflushing water inlet pipe 6 is connected to the guide groove 501. A guide rod 502 is connected to the side wall of the moving ring 2, and the other end of the guide rod 502 extends into the guide groove 501.

[0032] The guide rod 502 is in sealed sliding contact with the guide groove 501. A spring 503 is connected between the guide rod 502 and the groove wall of the guide groove 501. A water inlet pipe 504 is connected to the groove wall of the guide groove 501. The other end of the water inlet pipe 504 extends to the outside of the water supply pipe 1 and is connected to the external high-pressure water pipe.

[0033] Under the action of spring 503, guide rod 502 can block backflow water inlet pipe 6.

[0034] In this embodiment, refer to Figure 4 As shown, multiple guide grooves 501 are provided to enhance the stability of the moving ring 2 in the water supply pipe 1 and prevent the moving ring 2 from deflecting during movement. The multiple guide grooves 501 are connected by a connecting pipe 505, so that the water inlet pipe 504 can simultaneously introduce high-pressure water into multiple guide grooves 501.

[0035] In this embodiment, refer to Figure 2 As shown, the filter screen 8 includes a fixing cylinder 801, which is movably installed in the inner hole of the fixing ring 4 through a sealing ring, so that when the filter screen 8 is damaged, the filter screen 8 can be removed from the fixing ring 4 for replacement or repair.

[0036] A filter cartridge 802 is connected to the fixed cylinder 801, and the peripheral wall of the filter cartridge 802 is directly opposite the backwash inlet pipe 6.

[0037] In this embodiment, refer to Figure 1 and Figure 3 As shown, a sealing block 3 is provided inside the water supply pipeline 1 to seal the inner hole of the moving ring 2, and the moving ring 2 and the sealing block 3 are in sliding contact.

[0038] The backwash drain pipe 7 is located between the sealing block 3 and the filter screen 8.

[0039] In this embodiment, the fixing ring 4 and the water supply pipe 1 are detachably installed, and a sealing ring is provided between the fixing ring 4 and the inner wall of the water supply pipe 1.

[0040] Working principle: When using this high-salinity wastewater pretreatment filtration device based on thermal membrane, firstly as follows... Figure 1 As shown, the blocking block 3 separates from the moving ring 2. Water enters the water supply pipe 1 from the left, passes through the moving ring 2 and the filter screen 8, and is discharged from the water supply pipe 1 from the right. Impurities in the water are intercepted by the filter screen 8.

[0041] After a period of time, when a lot of impurities adhere to the surface of the filter screen 8, high-pressure water enters the guide groove 501 through the inlet pipe 504. Under the pressure of the high-pressure water, the guide rod 502 moves away from the guide groove 501 and stretches the spring 503. The guide rod 502 drives the moving ring 2 away from the fixed ring 4. The moving ring 2 connects with the sealing block 3, thereby blocking the inner hole of the moving ring 2. At the same time, the moving ring 2 separates from the backwash drain pipe 7, and the guide rod 502 separates from the backwash inlet pipe 6. The high-pressure water flows through the backwash inlet pipe 6 to the filter cartridge 802, thereby backwashing the filter cartridge 802 and washing the impurities adhering to the outer surface of the filter cartridge 802 between the fixed ring 4 and the moving ring 2, and finally discharges them from the backwash drain pipe 7. Therefore, the filter cartridge 802 can be cleaned without disassembling it, thus improving the service life of the filter cartridge 802.

[0042] In particular, after the sealing block 3 blocks the moving ring 2, it can also prevent impurities from flowing back to the water inlet port of the water supply pipe 1 and can quickly discharge impurities from the water supply pipe 1.

[0043] Furthermore, during the backwashing of the filter cartridge 802, the downstream of the water supply pipe 1 is closed by a control valve, restricting the high-pressure water flow to be discharged only through the backwash drain pipe 7, which can increase the impact force of the water flow.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-salinity wastewater pretreatment filtration device based on a thermal membrane, characterized in that, Includes a water supply pipe (1), in which a horizontally coaxial fixed ring (4) and a movable ring (2) are provided, and the outer peripheral wall of the movable ring (2) is slidably connected to the inner wall of the water supply pipe (1) through a sealing ring; A drive assembly (5) is provided on the fixed ring (4), and the drive assembly (5) is connected to the moving ring (2) to drive the moving ring (2) to slide in the water supply pipe (1). A filter screen (8) is provided on the inner hole of the fixed ring (4), and a backwash inlet pipe (6) is provided on the fixed ring (4). One end of the backwash inlet pipe (6) is connected to an external high-pressure water pipe, and the other end is located downstream of the filter screen (8). A backwash drain pipe (7) is provided on the water supply pipe (1) upstream of the filter screen (8), and the peripheral wall of the moving ring (2) slides in contact with the opening of the backwash drain pipe (7).

2. The high-salinity wastewater pretreatment filtration device based on a thermal membrane according to claim 1, characterized in that: The drive assembly (5) includes a guide groove (501) opened on the fixed ring (4), and the guide groove (501) is arranged facing the moving ring (2), and the backwash water inlet pipe (6) is connected to the guide groove (501). A guide rod (502) is connected to the side wall of the moving ring (2), and the other end of the guide rod (502) extends into the guide groove (501). The guide rod (502) is in sealed sliding contact with the guide groove (501). A spring (503) is connected between the guide rod (502) and the groove wall of the guide groove (501). A water inlet pipe (504) is connected to the groove wall of the guide groove (501). The other end of the water inlet pipe (504) extends to the outside of the water supply pipe (1) and is connected to an external high-pressure water pipe.

3. The high-salinity wastewater pretreatment filtration device based on a thermal membrane according to claim 2, characterized in that: Multiple guide grooves (501) are provided, and the multiple guide grooves (501) are connected to each other through a connecting pipe (505).

4. The high-salinity wastewater pretreatment filtration device based on a thermal membrane according to claim 1, characterized in that: The filter screen (8) includes a fixed cylinder (801), which is movably installed in the inner hole of the fixed ring (4) through a sealing ring; A filter cartridge (802) is connected to the fixed cylinder (801), and the peripheral wall of the filter cartridge (802) is directly opposite the backwash inlet pipe (6).

5. The high-salinity wastewater pretreatment filtration device based on a thermal membrane according to claim 1, characterized in that: A sealing block (3) capable of sealing the inner hole of the moving ring (2) is provided inside the water supply pipe (1), and the moving ring (2) and the sealing block (3) are in sliding contact; The backwash drain pipe (7) is located between the sealing block (3) and the filter screen (8).

6. The high-salinity wastewater pretreatment filtration device based on a thermal membrane according to claim 1, characterized in that: The fixing ring (4) is detachably installed with the water supply pipe (1), and a sealing ring is provided between the fixing ring (4) and the inner wall of the water supply pipe (1).

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