CN207130053U - A kind of RO concentrated waters and the water reuse (treatment processing system of recirculated water draining - Google Patents

Abstract

The utility model discloses a water regeneration treatment system for RO concentrated water and circulating water drainage, including a regulating tank, an air flotation machine, a valveless filter, a multifunctional filter, a regenerated sodium ion exchanger, a security filter, and an RO membrane filter: The inlet of the adjustment tank is connected to the reverse osmosis RO concentrated water outlet through the pipeline. There are parallel double water pumps in the adjustment tank. The double water pumps are connected to the water inlet of the air flotation machine through the water pipe, and the water outlet of the air flotation machine is connected to the valveless filter through the pipeline. The water inlet of the valveless filter is connected to the water inlet of the multifunctional filter by a pipeline, the multifunctional filter is connected to the buffer tank through the water pipeline, and the buffer tank is connected to the water inlet of the regeneration sodium ion exchanger through the water pipeline, and the regeneration The water outlet of the sodium ion exchanger is connected to the water inlet of the security filter, the water outlet of the security filter is connected to the water inlet of the RO membrane filter through the high-pressure pump, and the water outlet of the RO membrane filter is connected to the production pool. The new type can realize the water regeneration treatment of RO concentrated water and circulating water drainage, and meet the discharge requirements.

Description

A water regeneration treatment system for RO concentrated water and circulating water drainage

technical field

The utility model relates to the technical field of water treatment, in particular to a water regeneration treatment system for draining RO concentrated water and circulating water.

Background technique

With the development of environmental protection, the country has higher and higher requirements for sewage discharge, stricter discharge standards, and higher water-saving requirements. Industrial enterprises such as coal chemical enterprises consume large amounts of water and cause heavy pollution. In order to meet the national clean production and environmental protection requirements, various coal chemical enterprises have begun to reuse various wastewater generated in production. At present, the water reuse treatment method of RO concentrated water and circulating water drainage usually adopts UF (ultrafiltration) + RO (reverse osmosis) double-membrane treatment. After double-membrane treatment, the salt and pollutants contained in the water After being concentrated, a large amount of RO concentrated water with excessive COD (chemical oxygen demand), high salt content, high hardness, ammonia nitrogen, and total nitrogen exceeding the standard will be produced. The reverse osmosis RO concentrated water must be treated and discharged after reaching the standard. In addition, in the process of producing desalinated water, the desalinated water station of the factory also uses reverse osmosis, which produces a large amount of high-salt wastewater. Since the raw water used by many enterprises to produce desalinated water is polluted to a certain extent, the RO concentrated water discharged and recycled The water cannot meet the discharge requirements and needs to be treated to meet the standards before it can be discharged.

Utility model content

The purpose of the utility model is to provide a water regeneration treatment system for RO concentrated water and circulating water drainage in view of the technical defects in the prior art.

The technical scheme adopted for realizing the purpose of this utility model is:

A water regeneration treatment system for RO concentrated water and circulating water drainage, including a regulating tank, an air flotation machine, a valveless filter, a multifunctional filter, a regenerated sodium ion exchanger, a security filter, and an RO membrane filter: among them, The inlet of the regulating tank is connected to the reverse osmosis RO concentrated water outlet through a pipeline. The regulating tank is provided with parallel double water pumps, and the double water pumps are connected to the water inlet of the air flotation machine through water pipes. The air flotation machine The water outlet of the valve is connected to the water inlet of the valveless filter through the pipeline, and the water outlet of the valveless filter is connected to the water inlet of the multifunctional filter by the pipeline, and the multifunctional filter is connected to the buffer pool through the water pipeline, and the The buffer tank is connected to the water inlet of the regenerated sodium ion exchanger through the water pipeline, the water outlet of the regenerated sodium ion exchanger is connected to the water inlet of the security filter, and the water outlet of the security filter is connected to the RO membrane filter through the high pressure pump. water inlet, and the water outlet of the RO membrane filter is connected to the produced water tank.

The regulating tank, the buffer tank and the water production tank are provided with liquid level gauges, including high pressure water level gauges and low water level gauges.

Two parallel drainage pumps are arranged in the water production tank, and the two drainage pumps share a water outlet pipe.

Two parallel water delivery pumps are arranged on the water pipeline between the water outlet of the buffer pool and the water inlet of the regenerated sodium ion exchanger.

The air flotation machine is connected with an air flotation and dissolved air pump, and the air flotation machine has a sludge outlet.

Through the above technical scheme, the utility model can realize the effective treatment of RO concentrated water and circulating water after centralized drainage, the water quality of the effluent can reach the reuse standard, and the effluent can be reused.

Description of drawings

Figure 1 is a schematic diagram of the principle of a reverse osmosis RO concentrated water treatment system;

Fig. 2 is a structural schematic diagram of a reverse osmosis RO concentrated water treatment system.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1-2, a water regeneration treatment system for RO concentrated water and circulating water drainage, including a regulating tank 1, an air flotation machine 2, a valveless filter 3, a multifunctional filter 4, and a regenerated sodium ion exchanger 6. Security filter 7, RO membrane filter 9: wherein, the inlet of the regulating tank is connected to the outlet of RO concentrated water and circulating water through pipelines, and the regulating tank is equipped with parallel double water pumps 14, and the double water pumps 14 are connected in parallel. The water pump is connected to the water inlet of the air flotation machine through the water pipe, the water outlet of the air flotation machine is connected to the water inlet of the valveless filter through the pipeline, and the water outlet of the valveless filter is connected to the multifunctional filter by the pipeline. Water inlet, the multifunctional filter is connected to the buffer tank 5 through the water pipeline, the buffer tank is connected to the water inlet of the regenerated sodium ion exchanger 6 through the water pipeline, and the water outlet of the regenerated sodium ion exchanger is connected to the security filter 7 The water inlet of the security filter is connected to the water inlet of the RO membrane filter 9 through the high-pressure pump 8, and the water outlet of the RO membrane filter is connected to the water production tank 10.

Wherein, the regulating tank, the buffer tank and the water production tank are provided with liquid level gauges, including a high pressure water level gauge 12 and a low water level gauge 13 .

Wherein, two parallel double water pumps 14 are arranged in the water production tank to drain water, and the two water pumps share one water outlet pipe.

Wherein, two parallel water delivery pumps 11 are arranged on the water pipeline between the water outlet of the buffer pool and the water inlet of the regenerated sodium ion exchanger.

Wherein, the air flotation machine is connected with an air flotation dissolved air pump 21, and the air flotation machine has a sludge outlet.

It should be noted that, in the utility model, the air flotation machine adopts a dissolved air flotation machine, and air is sent by an air compressor, and is forced to dissolve in water under a pressure of 0.35Mpa to form dissolved air water. In the case of sudden release, the air dissolved in the water is precipitated to form a large number of microbubble groups, which fully contact with the suspended solids in the pumped sewage that is being flocculated after dosing, and are adsorbed in the slowly rising process. The flocculated suspended solids are lowered in density and floated to the water surface to achieve the purpose of removing SS and CODcr. The scum on the surface of the air flotation machine can be collected by the scum scraper into the scum conduit, and then flow into the sludge tank. Using the air flotation machine to pre-treat wastewater can effectively remove suspended solids and CODcr in the wastewater, and reduce the processing burden for subsequent equipment treatment. Specifically, the AFSF series of super dissolved air flotation sewage produced by Zhucheng Aofeng Environmental Protection Equipment Co., Ltd. can be used processor.

The multifunctional filter can further remove suspended solids and particulate matter in water, reduce turbidity, purify water quality, reduce system dirt, bacteria and algae, rust, etc., so as to purify water quality and protect other equipment in the system to work normally. Water enters through the water inlet Multifunctional filter, after the impurities are deposited, it will discharge the sewage. Specifically, it can be realized by adopting the multifunctional filter disclosed in CN2003201253565.

The valveless filter utilizes the principle of siphon to carry out regular backwashing, and the filter does not need valves for water inflow and outflow, flushing and drainage, and operates automatically by hydraulic action. Raw water enters the valveless filter through the water pipe and is filtered from top to bottom through the filter layer, then enters the water storage tank, and enters the next stage through the outlet pipe after it is full. Suspended solids are kept in the filter layer, resulting in increased resistance, which promotes the continuous rise of the water level in the siphon tube. When the water level reaches the mouth of the siphon auxiliary tube, the water falls from the tube and passes through the suction tube to take away the siphon-falling air. When the vacuum When the temperature reaches a certain value, a siphon effect occurs to make water pass through the filter layer from bottom to top to backwash the filter material. When the water level of the flushing water tank drops to the siphon breaking pipe, air enters the siphon pipe to destroy the siphon effect, and the backwashing ends, and the filtration starts again. Specifically, the fully automatic high-efficiency fiber bundle valveless filter disclosed in CN2011104486439 is adopted.

The regenerated sodium ion exchanger is used to remove calcium ions and magnesium ions in water to prepare softened water. The calcium and magnesium ions that make up the hardness in the water are exchanged with the ion exchange resin in the softener, and the calcium and magnesium ions in the water are exchanged with sodium ions, making it difficult to form carbonate scale and sulfate scale in the water, thus obtaining softened water. Reducing the content of hardness in water reduces the risk of internal fouling in subsequent equipment. Specifically, the cylinder body disclosed in CN87211270 adopts a regenerated sodium ion exchanger with a segmented structure.

The security filter uses a tubular filter element such as PP meltblown, wire-fired, folded, titanium filter, activated carbon filter, etc. as a filter element, and the raw water is processed by the security filter to further remove mechanical impurities remaining in the raw water . Its characteristics are: 1) high filtration precision, uniform pore size of the filter element; 2) small filtration resistance, large flux, strong dirt interception ability, and long service life; 3) high cleanliness of the filter element material, no pollution to the filter medium; 4) acid resistance , alkali and other chemical solvents; 5) high strength, high temperature resistance, the filter element is not easy to deform; 6) low price, low operating cost, easy to clean, and the filter element can be replaced. Specifically, the security filter capable of continuous operation disclosed in CN201220606347.7 can be used.

First of all, the wastewater enters the air flotation machine for treatment. After the wastewater is treated by the pre-system, the water contains many fine microorganisms and suspended solids. These microorganisms can attach to the fillers of the subsequent system and multiply, blocking the fillers and affecting the service life of subsequent equipment. Removal efficiency, so the air flotation machine first removes most of the fine microorganisms in the water, and removes part of the suspended solids, reducing the CODcr and turbidity of the wastewater.

Secondly, the wastewater passes through the valveless filter and multi-functional filter, which can further reduce the suspended solids and turbidity value in the water, so as to meet the water inlet requirements of subsequent equipment. The valveless filter is prepared by using the principle of siphon. There is no valve on the filter, which can realize automatic operation and cleaning, and reduce the risk of manual operation errors.

Finally, the RO membrane filter is used as the desalination device, which is a membrane separation operation process that uses pressure difference as the driving force to separate the solvent from the solution. It has the characteristics of high desalination efficiency, high recovery rate, and long service life. The quality of the effluent water meets the reuse standard, and the RO membrane filter can be directly purchased from the market to achieve the corresponding RO membrane filter.

When working, the RO concentrated water and circulating water drainage first enters the regulating tank, and then enters the air flotation machine through the lifting pump, and the residual microorganisms in the water are removed through the air flotation machine; then, the waste water is removed through the valveless filter and the multi-functional filter The remaining suspended solids and colloidal substances in the waste water are discharged through the backwash of the equipment; the mixed wastewater filtered by the valveless filter and the multifunctional filter passes through the regenerated sodium ion exchanger, and the regenerated sodium ion exchanger It can effectively remove calcium and magnesium ions in the mixed wastewater, reduce the hardness of the wastewater to ensure that the low-pressure boiler is not easy to scale; the wastewater passes through the security filter, and the function of the security filter is to remove suspended solids with small particle sizes in the water to ensure the quality of the wastewater The water quality index meets the requirements of entering the subsequent membrane system, and finally enters the RO membrane system formed by the RO membrane filter, and reduces the salinity in the wastewater through membrane separation. The final water production rate is controlled at about 70%, and the produced water reaches the reuse standard and is reused.

In the utility model, the treated waste water enters the regulating pool at first, so that the follow-up equipment system can be operated under a stable flow rate, and at the same time, the water quality is not fluctuated greatly.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these Improvement and retouching should also be regarded as the protection scope of the present utility model.

Claims (5)

1. A water regeneration treatment system for RO concentrated water and circulating water drainage, characterized in that it includes a regulating tank, an air flotation machine, a valveless filter, a multifunctional filter, a regenerated sodium ion exchanger, a security filter, a RO Membrane filter: wherein, the inlet of the regulating tank is connected to the reverse osmosis RO concentrated water outlet through a pipeline, and the regulating tank is equipped with parallel double water pumps, and the double water pumps are connected to the water inlet of the air flotation machine through water pipes , the water outlet of the air flotation machine is connected to the water inlet of the valveless filter through the pipeline, and the water outlet of the valveless filter is connected to the water inlet of the multifunctional filter by the pipeline, and the multifunctional filter passes through the water pipeline Connect the buffer pool, the buffer pool is connected to the water inlet of the regenerated sodium ion exchanger through the water pipeline, the water outlet of the regenerated sodium ion exchanger is connected to the water inlet of the security filter, and the water outlet of the security filter is passed through the high-pressure pump The water inlet of the RO membrane filter is connected, and the water outlet of the RO membrane filter is connected with the produced water tank. 2. The water regeneration treatment system for RO concentrated water and circulating water drainage according to claim 1, wherein a liquid level gauge is provided in the regulating tank, the buffer tank and the water production tank, including a high-pressure water level gauge and a low-pressure water level gauge. Water level gauge. 3. The water regeneration treatment system for RO concentrated water and circulating water drainage according to claim 1, characterized in that two parallel drain pumps are arranged in the water production tank, and the two drain pumps share one outlet pipe. 4. according to claim 1, the water regeneration treatment system of RO concentrated water and circulating water drainage, is characterized in that two parallel connections are established on the water pipeline between the water outlet of the buffer tank and the water inlet of the regenerative sodium ion exchanger. water pump. 5. The water regeneration treatment system for RO concentrated water and circulating water drainage according to claim 1, wherein the air flotation machine is connected to an air flotation dissolved air pump, and the air flotation machine has a sludge outlet.