CN217297382U

CN217297382U - Reverse osmosis water treatment system for recovering energy by using power generation device

Info

Publication number: CN217297382U
Application number: CN202122902954.XU
Authority: CN
Inventors: 吕志园; 王寅; 李彬; 郭伟成; 俞嘉伟
Original assignee: Hangzhou Lesheng Environmental Protection Engineering Co ltd
Current assignee: Hangzhou Lesheng Environmental Protection Engineering Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-08-26
Anticipated expiration: 2031-11-23

Abstract

The utility model discloses a reverse osmosis water treatment system for recovering energy by utilizing a power generation device, which comprises a first booster pump, a reverse osmosis device, a second booster pump, a nozzle and a power generation device connected with an impeller, wherein the second booster pump, the first booster pump, the reverse osmosis device and the nozzle are connected in sequence through pipelines, and the second booster pump is connected with the power generation device through a wire; the nozzle is arranged on one side of the impeller and is connected with a concentrated water outlet of the reverse osmosis device, and the spraying direction is tangential to the impeller; the generating set comprises a stator and a rotor, wherein the stator and the rotor are wound with conducting wires, and one side of the rotor, which is close to the stator, is provided with a magnet with an outer convex surface. The high-pressure concentrated water generated by the reverse osmosis device flows into the nozzle, drives the impeller to enable the power generation device to generate electric energy after being ejected from the nozzle, drives the second booster pump, can fully utilize the residual energy in the high-pressure concentrated water to act on the power generation device to generate the electric energy, drives the booster pump to pressurize the inlet water, reduces energy loss and reduces treatment cost.

Description

Reverse osmosis water treatment system for recovering energy by using power generation device

Technical Field

The utility model belongs to the technical field of the water treatment and specifically relates to an utilize reverse osmosis water treatment system of power generation facility recovered energy.

Background

In the field of water treatment, the reverse osmosis method is a water treatment technology which is commonly used at present, and is mainly a membrane separation technology which selects the function of a permeable (semi-permeable) membrane and uses pressure as a driving force. In the working process, the reverse osmosis membrane uses a special high-pressure water pump to add raw water to 6-20 kg of pressure, so that the raw water permeates through the reverse osmosis membrane with the pore diameter of only 0.0001 micron under the action of the pressure. Chemical ions, bacteria, fungi and virosomes can not pass through the wastewater, and only water molecules with the volume less than 0.0001 micron are allowed to pass through the wastewater, so that the aim of purifying water is fulfilled. In the reverse osmosis treatment process, reverse osmosis concentrated water is generally directly discharged and still has higher pressure, so that the mechanical energy in the concentrated water is not utilized, and energy waste is easily caused. Chinese patent publication No. CN208229668U discloses an energy recovery pump for reverse osmosis water treatment system, in which a connecting rod drives a diaphragm to reciprocate in a pump body, raw water enters a pressurizing cavity through a water inlet check valve and then enters a water inlet of a reverse osmosis membrane module through the pressurizing check valve, and wastewater enters a recovery cavity from a dense water inlet of the reverse osmosis membrane module through a recovery check valve and then is discharged through a drainage check valve. However, such devices still have the problems of complex structure, low efficiency and the like.

Disclosure of Invention

The utility model provides a reverse osmosis water treatment system for recovering energy by utilizing a power generation device, which aims to overcome the problems of waste of concentrated water mechanical energy and low energy utilization efficiency in the prior art. Can reuse the mechanical energy contained in the concentrated water and reduce the energy waste.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a reverse osmosis water treatment system for recovering energy by using a power generation device comprises a first booster pump, a reverse osmosis device, a second booster pump, a nozzle and a power generation device connected with an impeller, wherein the second booster pump, the first booster pump, the reverse osmosis device and the nozzle are sequentially connected through pipelines, and the second booster pump is connected with the power generation device through a lead; the reverse osmosis device is provided with a sewage inlet, a concentrated water outlet and a fresh water outlet, the first booster pump is connected with the sewage inlet of the reverse osmosis device, and the nozzle is connected with the concentrated water outlet; the nozzle is arranged on one side of the impeller, and the spraying direction of the nozzle is tangential to the impeller; the power generation device comprises a stator and a rotor, wherein the stator and the rotor are wound with wires, and one side of the rotor, which is close to the stator, is provided with a magnet with an outer convex surface.

During the operation of the reverse osmosis device, the inflowing water flow has a high pressure, one part of the inflowing water flow passes through the reverse osmosis membrane to achieve the purification purpose, the pressure of the inflowing water flow is consumed in the process of passing through the reverse osmosis membrane, and the other part of the inflowing water flow does not pass through the reverse osmosis membrane and still has a high pressure. High-pressure concentrated water is input into the nozzle, the high-pressure concentrated water can drive the impeller to rotate after being ejected from the nozzle, direct current is conducted in a rotor winding of the generator to form a magnetic field, and meanwhile, the rotor rotates to generate a rotating magnetic field. The generator stator set generates alternating induction potential due to the rotating magnetic field of the cutting rotor, and three-phase current is generated. The electric energy is input into the second booster pump to drive the second booster pump to pressurize the sewage, mechanical energy contained in high-pressure concentrated water can be fully recovered, external energy needed by the first booster pump is reduced, and energy waste and cost expenditure are reduced.

Preferably, the rotor and the impeller in the power generation device are connected by a connecting rod. The rotor can be directly driven to rotate by the rotation of the impeller to generate a rotating magnetic field.

Preferably, the magnetism of the magnet is the same as the magnetism of a magnetic field generated by energization of the rotor. In the working process, the pressure of reverse osmosis concentrated water may fluctuate, so that the rotating speed of the impeller fluctuates, the working stability of the power generation device is affected, a magnet is additionally arranged between the stator and the rotor, repulsion force exists between the magnet and a magnetic field generated after the rotor is electrified, the repulsion force can be applied to the rotor along the rotating direction of the rotor, and the running stability of the rotor is improved.

Preferably, the diameter of the outlet of the nozzle is 15-32 mm. Too small a diameter may cause unsmooth flow and affect the operation of the reverse osmosis device, and too large a diameter may cause too low a flow rate and too small a pressure to drive the impeller and the power generation device to operate normally.

Preferably, the number of the nozzles is one or two. The angle setting through the nozzle guarantees that the rivers that jet out are intact to hit and hit on the impeller, improves work efficiency.

Preferably, the nozzle is further provided with a regulating valve. The flow of reverse osmosis concentrated water flowing into the nozzle can be adjusted, and the working efficiency is ensured through reasonable flow setting.

Preferably, the first booster pump and the second booster pump are high-pressure centrifugal pumps or plunger pumps.

Therefore, the utility model discloses following beneficial effect has: the residual energy in the high-pressure concentrated water is fully utilized, the nozzle is used for generating electric energy for the power generation device, the booster pump is driven to pressurize the inlet water, the energy loss is reduced, and the treatment cost is reduced.

Drawings

Figure 1 is a typical process flow diagram of the present invention.

Fig. 2 is a schematic structural diagram of the power generation device of the present invention.

Fig. 3 is a schematic structural diagram of the rotor and the stator of the present invention.

In the figure: 1 a first booster pump, 2 a second booster pump, 3 a reverse osmosis device, 31 a sewage inlet, 32 a concentrated water outlet, 33 a fresh water outlet, 4 nozzles, 41 regulating valves, 5 a power generation device, 51 a stator, 52 a rotor, 521 a magnet, 53 an outlet box, 54 connecting rods, 55 impellers, 56 a water tank and 6 conducting wires.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

A reverse osmosis water treatment system for recovering energy by using a power generation device comprises a first booster pump 1, a reverse osmosis device 3, a second booster pump 2, two nozzles 4 and a power generation device 5 connected with an impeller 55, wherein sewage is pressurized by the first booster pump and then is delivered to the reverse osmosis device. Second booster pump, first booster pump, reverse osmosis unit, nozzle loop through the pipe connection, are connected through wire 6 between second booster pump and the power generation facility, reverse osmosis unit is equipped with sewage entry 31, dense water export 32 and fresh water export 33, and first booster pump, second booster pump are high-pressure centrifugal pump, and first booster pump is connected with reverse osmosis unit's sewage entry. The nozzle is arranged on one side of the impeller and connected with a concentrated water outlet, the spraying direction is tangent to the impeller, and the diameter of the outlet of the nozzle is 20 mm. The nozzle is also provided with a regulating valve 41.

As shown in fig. 2, the generator includes a stator 51 wound with a conductive wire and a rotor 52 provided with a magnet 521 having an outer convex surface on a side close to the stator. The rotor is connected to the impeller by a connecting rod 54. As shown in fig. 3. A magnet 521 having an outer convex surface is provided on the side of the rotor adjacent to the stator.

In the working process, the sewage is firstly pressurized by the first booster pump to obtain enough pressure and then enters the reverse osmosis device. Wherein, part of the sewage passes through the reverse osmosis membrane to achieve the purification purpose, and the pressure of the sewage is consumed in the process of passing through the reverse osmosis membrane and is discharged from one side of the reverse osmosis device; and the other part of the sewage still has higher pressure without passing through the reverse osmosis membrane, and the part of the high-pressure concentrated water enters the nozzle from the other side of the reverse osmosis device and is emitted from the nozzle. The angle of the nozzle is adjusted, so that the ejected sewage can push the impeller to rotate to drive the rotor to rotate, direct current is conducted in the rotor winding to form a magnetic field, and meanwhile, the rotor rotates to generate a rotating magnetic field. The stator set of the generator generates alternating induced potential due to the rotating magnetic field of the cutting rotor, generates three-phase current, inputs electric energy into the second booster pump and drives the second booster pump to pressurize subsequent sewage. When the pressure of the concentrated water fluctuates, the rotor can keep the rotating speed within a certain time due to the interaction force between the rotor and the magnet, and the fluctuation of the current is reduced. Adopt the utility model discloses can fully retrieve the mechanical energy that contains in the middle of the high-pressure dense water, reduce the external energy that first booster pump needs, reduce energy waste and cost expenditure.

Claims

1. A reverse osmosis water treatment system for recovering energy by using a power generation device comprises a first booster pump (1), a reverse osmosis device (3) and is characterized by further comprising a second booster pump (2), a nozzle (4) and a power generation device (5) connected with an impeller (55), wherein the second booster pump, the first booster pump, the reverse osmosis device and the nozzle are sequentially connected through a pipeline, and the second booster pump is connected with the power generation device through a lead (6); the reverse osmosis device is provided with a sewage inlet (31), a concentrated water outlet (32) and a fresh water outlet (33), the first booster pump is connected with the sewage inlet of the reverse osmosis device, and the nozzle is connected with the concentrated water outlet; the nozzle is arranged on one side of the impeller, and the spraying direction of the nozzle is tangential to the impeller; the power generation device comprises a stator (51) wound with a conducting wire and a rotor (52), wherein a magnet (521) with an outer convex surface is arranged on one side of the rotor close to the stator.

2. The reverse osmosis water treatment system for recovering energy by using a power generation device according to claim 1, wherein a rotor and an impeller of the power generation device are connected by a connecting rod (54).

3. The reverse osmosis water treatment system according to claim 1, wherein the magnets have the same magnetic properties as the magnetic field generated by the rotor when the rotor is energized.

4. The reverse osmosis water treatment system according to claim 1, wherein the nozzle has an outlet diameter of 15 to 32 mm.

5. The reverse osmosis water treatment system according to claim 1, wherein the number of the nozzles is one or two.

6. The reverse osmosis water treatment system for recovering energy by using a power generation device according to claim 1, wherein the nozzle is further provided with a regulating valve (41).

7. The reverse osmosis water treatment system for recovering energy by using a power generation device as claimed in claim 1, wherein the first and second booster pumps are high-pressure centrifugal pumps or plunger pumps.