High-pressure RO (Reverse Osmosis) equipment for treating high-salinity wastewater

Abstract

The utility model discloses high-pressure RO (Reverse Osmosis) equipment for treating high-salinity wastewater, which comprises an equipment bracket, and a high-pressure plunger pump, a booster pump, a membrane shell, a control cabinet, an instrument box, a pipeline and a line which are integrated on the equipment bracket, pretreated wastewater enters from a water inlet end of the high-pressure plunger pump, and a water outlet end of the high-pressure plunger pump is connected with water inlets of the two parallel membrane shells; the two parallel membrane shell water production pipelines are gathered to form a water production header pipe, the concentrated water header pipe after the concentrated water pipelines of the two parallel membrane shells are gathered is connected with a booster pump, the booster pump is connected with a water inlet of a third membrane shell, the water production pipeline of the third membrane shell is connected with the water production header pipe, and the concentrated water pipeline of the third membrane shell discharges water into a concentrated solution pool; the membrane element is a wide-flow-channel high-pressure reverse osmosis membrane element, wastewater is subjected to two-section treatment, the first section is used for treating raw water of an evaporation pond, the second section is used for retreating concentrated water generated in the first section treatment, and the recovery rate is ensured to be more than 75% through 2: 1 distribution of the membrane element.

Description

Technical Field

[0001] The utility model relates to the technical field of environmentally friendly sewage treatment, in particular to a high-pressure RO device for treating high-salt wastewater. Background Art

[0002] Evaporation ponds are widely used for wastewater storage in coal chemical, pharmaceutical and other factories, and are often used to store concentrated high-salt wastewater. The water quality of evaporation pond wastewater is complex, with problems such as excessive TDS (total dissolved solids), hard water quality, and high alkalinity. Since evaporation ponds occupy a large area, there is a risk of dam breaches causing wastewater overflow and even groundwater pollution. Therefore, it is necessary to purify the wastewater in the evaporation pond. However, the treatment cost of DTRO equipment in the prior art is too high, and ordinary reverse osmosis equipment cannot treat high-salt wastewater. In response to this problem, the present application provides a high-pressure RO device for treating high-salt wastewater. Utility Model Content

[0003] In view of the technical problems described in the background technology, the utility model provides a high-pressure RO equipment for treating high-salt wastewater. The membrane element uses a wide-channel high-pressure reverse osmosis membrane element to treat the wastewater in two stages. The first stage treats the raw water from the evaporation pond, and the second stage re-treats the concentrated water produced in the first stage to improve the wastewater recovery rate.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] A high-pressure RO device for treating high-salinity wastewater, comprising an equipment bracket, on which a high-pressure plunger pump, a booster pump, a membrane housing, a control cabinet, an instrument box, and pipes and lines connecting the above equipment are integrated;

[0006] The membrane shell uses a RO single-branch membrane shell, and a high-pressure RO membrane element is installed in each membrane shell; each membrane shell has a water inlet and two water outlet pipelines, one of which is a production water pipeline for water that passes through the membrane, and the other is a concentrated water pipeline for water that does not pass through the membrane;

[0007] The water inlet end of the high-pressure plunger pump is connected to the pretreated wastewater, and the water outlet end of the high-pressure plunger pump is connected to the water inlets of the two parallel membrane shells through a pipeline; the water production pipelines coming out of the two parallel membrane shells are collected to form a water production main pipe, and the concentrated water main pipe after the concentrated water pipelines coming out of the two parallel membrane shells are collected is connected to the booster pump, and the water outlet end of the booster pump is connected to the water inlet of the third membrane shell through a pipeline, and the water production pipeline coming out of the third membrane shell is connected to the water production main pipe, and the concentrated water pipeline coming out of the third membrane shell discharges water into the concentrated liquid pool.

[0008] Furthermore, two high-pressure plunger pumps are arranged in parallel. When working, the two high-pressure plunger pumps are turned on at the same time to increase the flow rate of water passing through the membrane shell.

[0009] Furthermore, a sampling valve is provided on the water production main pipe after the intersection of the water production main pipe and the water production pipeline of the third membrane shell. The water production main pipe is divided into two routes behind the sampling valve, one is a qualified water production pipeline, and the other is an unqualified water production pipeline.

[0010] Furthermore, a flow regulating valve is provided on the concentrated water pipeline of the third membrane shell. When the equipment is just turned on, a certain pressure is applied to the high-pressure RO membrane element through the flow regulating valve.

[0011] Furthermore, a sampling valve is provided on the water production pipeline of each membrane shell, so that the quality of the water produced by each membrane shell can be sampled and tested separately.

[0012] Furthermore, two wastewater treatment systems are arranged on the equipment bracket, and the two wastewater treatment systems are integrated on one equipment bracket. Each system operates independently, and the equipment has a high start-up rate, can adapt to sites with different processing volumes, and has high production efficiency.

[0013] The technical effects of the utility model are:

[0014] 1. The utility model adopts a wide-channel high-pressure reverse osmosis membrane element to treat the wastewater in two stages. The first stage treats the raw water from the evaporation pond, and the second stage re-treats the concentrated water produced in the first stage treatment. A booster pump is added before the second stage to ensure the water inlet pressure of the second stage; the 2:1 distribution of the membrane elements ensures that the recovery rate is above 75%.

[0015] 2.2 sets of RO systems are integrated on one equipment bracket. Each system operates independently and can adapt to sites with different processing volumes. The automated equipment has a compact structure, complete functions, and operates independently without interfering with each other, making it easy to transport and install, saving floor space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The shaft side of the utility model Figure 1 ;

[0017] Figure 2 The shaft side of the utility model Figure 2 ;

[0018] Figure 3 It is a flow chart of the wastewater treatment system;

[0019] In the figure, 1. equipment support, 2. high-pressure plunger pump, 3. booster pump, 4. membrane housing, 401. two parallel membrane housings, 401. the third membrane housing, 5. control cabinet, 6. instrument box, 7. water inlet, 8. water production pipeline, 9. concentrate water pipeline, 10. water production main pipe, 101. qualified water production pipeline, 102. unqualified water production pipeline, 11. concentrate water main pipe, 12. sampling valve, 13. flow control valve. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific Figures 1-3.

[0021] Reference Figure 1-3 As shown, the utility model provides a high-pressure RO device for treating high-salt wastewater, comprising an equipment bracket 1, on which a high-pressure plunger pump 2, a booster pump 3, a membrane housing 4, a control cabinet 5, an instrument box 6, and pipes and lines connecting the above-mentioned equipment are integrated;

[0022] The membrane shell 4 uses a single RO membrane shell, and a high-pressure RO membrane element is installed in each membrane shell 4; each membrane shell 4 has a water inlet 7 and two water outlet pipelines, one of which is a production water pipeline 8 for water that passes through the membrane, and the other is a concentrated water pipeline 9 for water that does not pass through the membrane;

[0023] The water inlet end of the high-pressure plunger pump 2 is connected to the pretreated wastewater. The purpose of pretreating the wastewater is to remove impurities in the water, and then the wastewater is treated by the RO equipment to improve the treatment efficiency of the RO equipment and extend the service life of the RO equipment; the water outlet end of the high-pressure plunger pump 2 is connected to the water inlet 7 of the two parallel membrane shells 401 through a pipeline; the water production pipelines 8 coming out of the two parallel membrane shells 401 are combined to form a water production main pipe 10, and the concentrated water main pipe 11 after the concentrated water pipelines 9 coming out of the two parallel membrane shells 401 are combined is connected to the booster pump 3, and the water outlet end of the booster pump 3 is connected to the water inlet of the third membrane shell 402 through a pipeline, and the concentrated water main pipe 11 from the third membrane shell 402 is connected to the booster pump 3. The production water pipeline coming out of the membrane shell 402 is connected to the production water main pipe 10. A sampling valve 12 is provided on the production water main pipe 10 after the intersection of the production water main pipe and the production water pipeline of the third membrane shell. The production water main pipe is divided into two routes behind the sampling valve. The water quality can be tested by sampling. The qualified production water is discharged through the qualified production water pipeline 101, and the unqualified production water is discharged through the unqualified production water pipeline 102; the concentrated water pipeline coming out of the third membrane shell 402 discharges the water into the concentrated liquid pool. The concentrated water pipeline of the third membrane shell 402 is provided with a flow regulating valve 13. When the equipment is just turned on, a certain initial pressure is given to the high-pressure RO membrane element by adjusting the flow regulating valve 13.

[0024] like Figure 1-2 As shown, two or more high-pressure plunger pumps 2 can be set in parallel. When working, multiple high-pressure plunger pumps are turned on at the same time to increase the flow rate of water through the membrane shell. If there is only one pump, the same flow rate will require a very large pump power, high cost, heavy load, and high operating noise, and there may not be such a high-power pump. At this time, parallel connection of pumps can solve this problem well.

[0025] Furthermore, a sampling valve 12 is provided on the water production pipeline of each membrane shell, so that the quality of the water produced by each membrane shell can be sampled and tested separately.

[0026] like Figure 1-2 As shown, two wastewater treatment systems are arranged on the equipment support 1. The two wastewater treatment systems are integrated on one equipment support. Each system operates independently and can adapt to sites with different wastewater treatment volumes.

[0027] Working principle: The pretreated high-salt wastewater enters two parallel membrane shells through a high-pressure plunger pump for one-stage treatment. The water that passes through the membrane flows out from the water production pipeline, and the water that does not pass through the membrane flows out from the concentrate pipeline. The concentrate from the concentrate pipeline is pressurized by a booster pump and enters the third membrane shell for two-stage treatment. The produced water after the two-stage treatment and the produced water from the first-stage treatment are combined and discharged. Qualified produced water is discharged through the qualified produced water pipeline, and unqualified produced water is discharged through the unqualified produced water pipeline; the concentrate from the third membrane shell is discharged into the concentrated liquid pool.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A high-pressure RO device for treating high-salinity wastewater, characterized in that: It comprises an equipment support (1), on which a high-pressure plunger pump (2), a booster pump (3), a membrane housing (4), a control cabinet (5), an instrument box (6), and pipelines and lines connecting the above-mentioned equipment are integrated; The membrane shell (4) uses a single RO membrane shell, and a high-pressure RO membrane element is installed in each membrane shell; each membrane shell has a water inlet (7) and two water outlet pipelines, one of which is a production water pipeline (8) for water that has passed through the membrane, and the other is a concentrated water pipeline (9) for water that has not passed through the membrane; The pretreated wastewater enters from the water inlet of the high-pressure plunger pump (2), and the water outlet of the high-pressure plunger pump (2) is connected to the water inlets of the two parallel membrane shells (401) through a pipeline; the water production pipelines of the two parallel membrane shells are combined to form a water production main pipe (10), and the concentrated water main pipe (11) formed by combining the concentrated water pipelines of the two parallel membrane shells is connected to the booster pump (3), and the water outlet of the booster pump (3) is connected to the water inlet of the third membrane shell (402) through a pipeline, and the water production pipeline from the third membrane shell (402) is connected to the water production main pipe (10), and the concentrated water pipeline from the third membrane shell (402) discharges water into the concentrated liquid pool.

2. A high-pressure RO device for treating high-salinity wastewater according to claim 1, characterized in that: Two high-pressure plunger pumps (2) are arranged in parallel, and the two high-pressure plunger pumps are started simultaneously during operation.

3. A high-pressure RO device for treating high-salinity wastewater according to claim 1, characterized in that: A sampling valve (12) is provided on the water production main pipe after the intersection of the water production main pipe and the water production pipeline of the third membrane shell. After the sampling valve, the water production main pipe is divided into two routes, one of which is a qualified water production pipeline (101) and the other is an unqualified water production pipeline (102).

4. A high-pressure RO device for treating high-salinity wastewater according to claim 1, characterized in that: A flow regulating valve (13) is provided on the concentrated water pipeline of the third membrane shell.

5. A high-pressure RO device for treating high-salinity wastewater according to claim 1, characterized in that: A sampling valve (12) is provided on the water production pipeline of each membrane shell (4).

6. A high-pressure RO device for treating high-salinity wastewater according to any one of claims 1 to 5, characterized in that: Two wastewater treatment systems are arranged on the equipment support (1).

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