A gas blocking and hammering device for a reverse osmosis system

Abstract

The utility model provides a kind of reverse osmosis system air resistance air hammer device, including concentrated discharge tail pipe and production discharge tail pipe, the concentrated discharge tail pipe and production discharge tail pipe are connected with discharge valve, the upside of concentrated discharge tail pipe and production discharge tail pipe is provided with inverted U type bend pipe.In the utility model, concentrated discharge tail pipe and production discharge tail pipe are connected with an inverted U type bend pipe, the height of the top of inverted U type bend pipe is higher than reverse osmosis membrane equipment, whereby concentrated discharge tail pipe and production discharge tail pipe drain, the water body that is located in the reverse osmosis membrane equipment upstream of concentrated discharge tail pipe and production discharge tail pipe remains, so that all membrane elements in reverse osmosis membrane equipment are in soaking state, exhaust valve is connected in the top of inverted U type bend pipe, the height of exhaust valve is also higher than reverse osmosis membrane equipment, whereby, when providing certain pressure water body to reverse osmosis membrane equipment, there will be water flow in U type bend pipe, simultaneously exhaust valve will quickly discharge air in U type bend pipe, avoid residual air to produce air hammer to damage membrane element in reverse osmosis membrane equipment.

Description

Technical Field

[0001] This utility model relates to the field of demineralized water reverse osmosis water production technology, specifically a reverse osmosis system air resistance hammer device. Background Technology

[0002] The demineralized water treatment workshop is designed with two production lines, each with a capacity of 2×100m³ / h. The process flow is as follows: Raw water → Raw water tank → Raw water pump → Heat exchanger → Bactericide dosing device → Multi-media filter → Self-cleaning filter → Ultrafiltration unit → Ultrafiltration water tank → Reverse osmosis water supply pump → Reducing agent dosing device → Scale inhibitor dosing device → Primary security filter → Primary high-pressure pump → Primary reverse osmosis unit → Intermediate water tank → Intermediate water pump → pH adjustment device → Secondary security filter → Secondary high-pressure pump → Secondary reverse osmosis unit → EDI feed water tank → EDI booster pump → EDI security filter → EDI unit → Demineralized water tank → Demineralized water pump → Main plant building.

[0003] In the current process flow, the outlet pipe of the high-pressure pump (frequency-controlled) of the reverse osmosis system goes upward to the highest point of the equipment after passing through the outlet electric valve. It then goes horizontally through a 90-degree bend to the first inlet section of the reverse osmosis equipment, and then downwards through another 90-degree bend to connect with the first inlet header of the reverse osmosis equipment. The overall pipeline has an inverted U-shape. The first stage of the reverse osmosis equipment is located at the top, and the second stage is located at the bottom. The concentrate discharge valve and product water discharge valve are located at the very bottom of the equipment. The discharge valves are opened to discharge concentrate and product water.

[0004] However, the above-mentioned methods of discharging concentrate and product water still have shortcomings: When the equipment is shut down, the system product water discharge valve and concentrate discharge valve are opened to flush and depressurize the equipment. After the pump is stopped, the reverse osmosis feed water electric valve is closed (about 40 seconds). During this process, some of the flushing water in the system has already been discharged by the product water discharge valve and concentrate discharge valve. As a result, during the shutdown process, the membrane elements (reverse osmosis equipment) in the upper part of the membrane housing are not immersed in water. The inverted U-shaped pipe is in an empty pipe and waterless state. The lack of water will cause a large amount of gas to be unable to be effectively discharged when the equipment is started. After the high-pressure pump starts, it compresses the gas inside the equipment, generating air hammer phenomenon, which causes mechanical impact damage to the membrane elements.

[0005] Therefore, this utility model provides a gas resistance hammer device for a reverse osmosis system. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a gas hammer device for a reverse osmosis system to solve the problems mentioned in the background technology. This utility model ensures that all membrane elements in the reverse osmosis equipment are always immersed in water, and will not cause damage to the membrane elements by gas hammer impact during equipment start-up and shutdown.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a reverse osmosis system gas resistance hammer device, including a concentrate discharge tailpipe and a product discharge tailpipe, both of which are connected in series with a discharge valve. An inverted U-shaped bend is provided above both the concentrate discharge tailpipe and the product discharge tailpipe. The two ends of the inverted U-shaped bend are respectively connected to the two ends of the discharge valve on the corresponding concentrate discharge tailpipe and the product discharge tailpipe. An exhaust valve is connected to the top of the inverted U-shaped bend. A pneumatic valve is connected in series on the inverted U-shaped bend near the water inlet end of the discharge valve.

[0008] Furthermore, both the concentrate discharge tailpipe and the product discharge tailpipe are fixedly connected to flange short pipes located at both ends of the discharge valve, and the two ends of the inverted U-shaped bend are welded with welded flanges that are bolted to the flange short pipes.

[0009] Furthermore, an extension pipe is provided on one side of the inverted U-shaped bend, the plane in which the extension pipe and the inverted U-shaped bend are located is parallel, the exhaust valve is connected in series on the extension pipe and is located near one end, and the other end of the extension pipe is rotatably connected to the top of the inverted U-shaped bend through a connector.

[0010] Furthermore, the connector includes an L-shaped tube and an adapter pipe fitted at one end of the L-shaped tube. The adapter pipe and the L-shaped tube are rotatably and sealingly connected. The other end of the L-shaped tube is fixedly connected to the top wall of the horizontal pipe at the top of the inverted U-shaped bend. The other end of the adapter pipe is fixedly connected to the other end of the extension pipe through an elbow.

[0011] Furthermore, an annular groove is formed inside the L-shaped tube, surrounding the outer periphery of the transfer tube, and a sealing sleeve is embedded in the annular groove.

[0012] Furthermore, a baffle is fixedly sleeved on the outside of one end of the L-shaped tube, and a limiting plate located outside the L-shaped tube is fixedly sleeved on the adapter tube. A torsion spring is connected between the baffle and the limiting plate, and a stop bar located on one side of the extension tube is fixedly connected to one side of the baffle.

[0013] Furthermore, the discharge valve is a manual valve.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, an inverted U-shaped bend is connected to both the concentrate discharge tailpipe and the product discharge tailpipe. The top of the inverted U-shaped bend is higher than the reverse osmosis membrane equipment. Thus, after the concentrate discharge tailpipe and the product discharge tailpipe drain water, water remains in the reverse osmosis membrane equipment located upstream of the concentrate discharge tailpipe and the product discharge tailpipe, so that all membrane elements in the reverse osmosis membrane equipment are in a soaking state. An air vent valve is connected to the top of the inverted U-shaped bend. The height of the air vent valve is also higher than the reverse osmosis membrane equipment. Thus, when water with a certain pressure is supplied to the reverse osmosis membrane equipment, water will flow in the U-shaped bend. At the same time, the air vent valve will quickly discharge the air in the U-shaped bend, avoiding the residual air from generating air hammer and damaging the membrane elements in the reverse osmosis membrane equipment.

[0016] 2. In this utility model, the top of the inverted U-shaped bend is connected to an extension pipe via a connector. An exhaust valve is connected in series on the extension pipe near the free end. The connector allows the extension pipe shell to rotate and drive the exhaust valve to lower its height. This arrangement facilitates lowering the height of the exhaust valve with automatic exhaust function, thereby facilitating the inspection and maintenance of the exhaust valve. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a reverse osmosis system air resistance hammer device according to the present invention;

[0018] Figure 2 This is a schematic diagram of the exhaust valve of the reverse osmosis system air resistance hammer device after the height has been reduced.

[0019] Figure 3 This is a schematic diagram of the connector of a reverse osmosis system gas resistance hammer device after an explosion and unfolding, according to the present invention.

[0020] Figure 4 This is a process flow diagram of a reverse osmosis system according to the present invention.

[0021] In the diagram: 1. Concentrate tailpipe; 2. Product tailpipe; 3. Discharge valve; 4. Inverted U-shaped bend; 41. Welded flange; 42. Horizontal pipe; 5. Exhaust valve; 6. Pneumatic valve; 7. Flange short pipe; 8. Extension pipe; 9. Connector; 91. L-shaped pipe; 911. Annular groove; 9111. Sealing sleeve; 912. Baffle plate; 9121. Baffle bar; 92. Transfer pipe; 921. Limiting plate; 101. Torsion spring. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please see Figures 1 to 4This utility model provides a technical solution: a reverse osmosis system air resistance hammer device, including a concentrate discharge tailpipe 1 and a product discharge tailpipe 2. Both the concentrate discharge tailpipe 1 and the product discharge tailpipe 2 are connected to the membrane shells on the first and second reverse osmosis sections of the reverse osmosis equipment through pipelines. The outlet of the concentrate discharge tailpipe 1 is opposite to the drainage ditch, and the outlet of the product discharge tailpipe 2 is opposite to the water tank. Both the concentrate discharge tailpipe 1 and the product discharge tailpipe 2 are connected in series with a discharge valve 3, wherein the discharge valve 3 is a manual valve, which serves as a drain valve during equipment maintenance.

[0024] Both the concentrated discharge tailpipe 1 and the product discharge tailpipe 2 are equipped with inverted U-shaped bends 4. The two ends of the inverted U-shaped bends 4 are connected to the corresponding ends of the discharge valves 3 on the concentrated discharge tailpipe 1 and the product discharge tailpipe 2, respectively. Specifically, flanged short pipes 7 are fixedly connected to the outer walls of both the concentrated discharge tailpipe 1 and the product discharge tailpipe 2, located at both ends of the discharge valves 3. Welded flanges 41, which are bolted to the flanged short pipes 7, are welded to both ends of the inverted U-shaped bends 4. PTFE gaskets are placed between the flanged short pipes 7 and the welded flanges 41. An exhaust valve 5 is connected to the top of the inverted U-shaped bends 4. The exhaust valve 5 is selected from... The structure features automatic venting. A pneumatic valve 6 is connected in series on the inverted U-shaped bend 4 near the inlet end of the discharge valve 3. The pneumatic valve 6 and the inverted U-shaped bend 4 can be detachably connected using a common flange and bolt combination. The pneumatic valve 6 is electrically connected to a controller (PLC). The pneumatic valve 6 connected to the concentrate discharge tailpipe 1 is a slow-opening type with the ability to stop midway. The logic control method modifies the high-pressure pump start-up and outlet electric valve opening time based on the opening and closing time of the pneumatic valve 6 in the concentrate discharge, ensuring that the membrane elements inside the reverse osmosis unit are always immersed in water. A venting valve 5 can be connected to the reverse osmosis inlet header via a bypass pipe.

[0025] In this embodiment, an extension pipe 8 is provided on one side of the inverted U-shaped bend 4. The planes on which the extension pipe 8 and the inverted U-shaped bend 4 are located are parallel. The exhaust valve 5 is connected in series on the extension pipe 8 and is located near one end. The other end of the extension pipe 8 is rotatably connected to the top of the inverted U-shaped bend 4 through a connector 9. When the extension pipe 8 rotates, it can drive the exhaust valve 5 to lower its height, making it easier for maintenance personnel to inspect and maintain the exhaust valve 5. The exhaust valve 5 can be detachably connected to the extension pipe 8 using a flange structure and bolts.

[0026] Specifically, connector 9 includes an L-shaped tube 91 and an adapter tube 92 fitted onto one end of the L-shaped tube 91. The adapter tube 92 and the L-shaped tube 91 are rotatably and sealingly connected. Specifically, an annular groove 911 is formed inside the L-shaped tube 91, surrounding the outer circumference of the adapter tube 92. A sealing sleeve 9111 is embedded in the annular groove 911 to seal the gap between the adapter tube 92 and the L-shaped tube 91 and prevent leakage. A retaining ring is welded to one end of the adapter tube 92, and a retaining groove (annular) adapted to the retaining ring is formed inside the L-shaped tube 91 to prevent the adapter tube 92 from axially moving relative to the L-shaped tube 91. The other end of the L-shaped tube 91 is fixedly connected to the top wall of the horizontal pipe 42 at the top of the inverted U-shaped bend 4, and the other end of the adapter tube 92 is fixedly connected to the other end of the extension pipe 8 through an elbow.

[0027] The L-shaped tube 91 has a baffle 912 fixedly fitted on one end, and a limiting plate 921 fixedly fitted on the adapter tube 92 outside the L-shaped tube 91. A torsion spring 101 is connected between the baffle 912 and the limiting plate 921. The two ends of the torsion spring 101 are fixedly connected to the opposite sides of the baffle 912 and the limiting plate 921, respectively. A stop bar 9121 located on one side of the extension tube 8 is fixedly connected to one side of the baffle 912. Under the action of the torsion spring 101, the extension tube 8 will press against the stop bar 9121 and maintain a vertical position. In this state, the exhaust valve 5 is at the highest position. When maintenance is required, the extension tube 8 can be pulled down with the help of an external traction tool (such as a pull rod or rope) to lower the height of the exhaust valve 5. In practice, a hook ring near the free end can be welded to the outer wall of the extension tube 8.

[0028] Working principle: When the equipment is shut down, the pneumatic valve 6 is fully opened, and the high-pressure pump flushes and depressurizes the upper reverse osmosis stage and the second reverse osmosis stage of the reverse osmosis equipment. After the high-pressure pump stops, wait for the reverse osmosis equipment inlet electric valve to close (about 40 seconds). The flushing water in the reverse osmosis equipment will be discharged through the concentrate discharge tailpipe 1 and the product discharge tailpipe 2. Due to the obstruction of the inverted U-shaped bend 4, the membrane elements inside the membrane housing of the reverse osmosis equipment are placed in the water. Due to the setting of the exhaust valve 5, when the high-pressure pump is restarted, the gas in the inverted U-shaped bend 4 will be quickly discharged through the exhaust valve 5, and there will be no state of compressed air remaining in the inverted U-shaped bend 4, thus preventing air hammer phenomenon and mechanical impact damage to the membrane elements in the reverse osmosis equipment.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gas hammer device for a reverse osmosis system, comprising a concentrate discharge tailpipe (1) and a product discharge tailpipe (2), wherein a discharge valve (3) is connected in series on both the concentrate discharge tailpipe (1) and the product discharge tailpipe (2), characterized in that, Both the concentrated discharge tailpipe (1) and the production discharge tailpipe (2) are provided with inverted U-shaped bends (4). The two ends of the inverted U-shaped bends (4) are connected to the positions of the discharge valves (3) on the corresponding concentrated discharge tailpipes (1) and production discharge tailpipes (2), respectively. An exhaust valve (5) is connected to the top of the inverted U-shaped bends (4). A pneumatic valve (6) is connected in series on the inverted U-shaped bends (4) near the water inlet end of the discharge valve (3).

2. The reverse osmosis system gas resistance hammer device according to claim 1, characterized in that: Both the concentrated discharge tailpipe (1) and the production discharge tailpipe (2) are fixedly connected to flange short pipes (7) located at both ends of the discharge valve (3). Both ends of the inverted U-shaped bend (4) are welded with welded flanges (41) that are bolted to the flange short pipes (7).

3. The reverse osmosis system gas resistance hammer device according to claim 1, characterized in that: An extension pipe (8) is provided on one side of the inverted U-shaped bend (4). The plane on which the extension pipe (8) and the inverted U-shaped bend (4) are located is parallel. The exhaust valve (5) is connected in series on the extension pipe (8) and is located near one end. The other end of the extension pipe (8) is rotatably connected to the top of the inverted U-shaped bend (4) through a connector (9).

4. The reverse osmosis system gas resistance hammer device according to claim 3, characterized in that: The connector (9) includes an L-shaped tube (91) and an adapter tube (92) with one end sleeved on one end of the L-shaped tube (91). The adapter tube (92) and the L-shaped tube (91) are rotatably and sealedly connected. The other end of the L-shaped tube (91) is fixedly connected to the top wall of the horizontal tube (42) at the top of the inverted U-shaped bend (4). The other end of the adapter tube (92) is fixedly connected to the other end of the extension tube (8) through an elbow.

5. The reverse osmosis system gas resistance hammer device according to claim 4, characterized in that: The L-shaped tube (91) has an annular groove (911) that surrounds the outer periphery of the adapter tube (92), and a sealing sleeve (9111) is embedded in the annular groove (911).

6. The reverse osmosis system gas resistance hammer device according to claim 4, characterized in that: A baffle (912) is fixedly sleeved on the outside of one end of the L-shaped tube (91), and a limiting plate (921) located outside the L-shaped tube (91) is fixedly sleeved on the adapter tube (92). A torsion spring (101) is connected between the baffle (912) and the limiting plate (921), and a stop bar (9121) located on one side of the extension tube (8) is fixedly connected to one side of the baffle (912).

7. The reverse osmosis system gas resistance hammer device according to claim 1, characterized in that: The discharge valve (3) is a manual valve.

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