CN218893556U

CN218893556U - High-utilization-rate demineralized water production system

Info

Publication number: CN218893556U
Application number: CN202223554442.XU
Authority: CN
Inventors: 胡俊辉; 吕建峰; 李子强; 钱宇翔; 徐春宇; 曾雄辉
Original assignee: Huixinying Jiaxing Environmental Protection Technology Co ltd
Current assignee: Huixinying Jiaxing Environmental Protection Technology Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-04-21
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a high-utilization desalted water production system, which comprises a raw water tank, a heating device, an ultrafiltration device, a reverse osmosis device, a mixed bed device, a chemical hardness removal device, a concentrated water ultrafiltration device, a concentrated water reverse osmosis device, a concentrated water chemical hardness removal device, a produced water mixed bed device and a concentrated water discharge device, wherein the raw water tank, the heating device, the ultrafiltration device, the reverse osmosis device and the mixed bed device are sequentially communicated by a pipeline and a pump. The utility model adds the emission reduction process flow based on the conventional process flow, namely a chemical hard removing device, a concentrated water ultrafiltration device and a concentrated water reverse osmosis device, which are used for treating and recycling the high-concentration wastewater of the reverse osmosis device, so that the water utilization rate of the system is improved from 65% to 92%, thereby improving the water utilization rate of the system, improving the productivity, reducing the wastewater discharge and lowering the overall production cost.

Description

High-utilization-rate demineralized water production system

Technical Field

The utility model relates to the technical field of wastewater treatment, in particular to a high-utilization-rate demineralized water production system.

Background

Demineralized water refers to the finished water obtained by removing suspended matter, colloid, inorganic cations, anions, and other impurities from water by various water treatment processes. The desalted water does not mean that the salt in the water is completely removed, and the desalted water is allowed to contain trace impurities according to different purposes due to technical reasons and the consideration of water production cost. The fewer impurities in the desalted water, the higher the water purity.

The traditional demineralized water production process is as follows: industrial water supply, ultrafiltration device (UF), reverse osmosis device (RO), mixed bed, demineralized water tank, and user. In the process, the reverse osmosis membrane device is an important device, and a large amount of high-concentration wastewater (mainly salt) is generated in the process of producing industrial desalted water, and the generated wastewater accounts for about 25% of the preparation amount of desalted water raw water. In addition, the ultrafiltration device, the reverse osmosis device and the mixed bed all need a large amount of flushing water or backwash water, and the water utilization rate of the conventional desalted water production system is generally maintained to be about 65%, so that the further improvement is difficult.

Disclosure of Invention

In order to improve the water utilization rate of the system on the premise that the water quality of produced water meets the requirement, the utility model provides a high-utilization-rate demineralized water production system.

The technical scheme adopted by the utility model is as follows: the utility model provides a high utilization ratio demineralized water production system, includes former water tank, heating device, ultrafiltration device, reverse osmosis unit and the mixed bed device that communicate in proper order by pipeline and pump, still includes chemical except that hard device, dense water ultrafiltration device and dense water reverse osmosis unit that communicate in proper order by pipeline and pump, reverse osmosis unit's dense water goes chemical except that hard device, dense water reverse osmosis unit's product water goes the mixed bed device, dense water reverse osmosis unit's dense water is discharged outward.

Preferably, the chemical hardness removal device comprises a front mixing tank, a rear mixing tank, a flocculation reaction tank, a clarification tank and a PH regulating tank which are sequentially communicated.

Preferably, the device further comprises a cleaning water treatment device, wherein the backwash water and the flushing water of the ultrafiltration device, the flushing water of the reverse osmosis device and the backwash water of the mixed bed device are connected into the cleaning water treatment device to the cleaning water treatment device, and the effluent water of the cleaning water treatment device is connected to the ultrafiltration device.

Preferably, the cleaning water treatment device comprises a collection water tank, a sand cylinder booster pump, a pipeline mixer and a filtering sand cylinder which are connected.

Preferably, the ultrafiltration device is provided with a UF self-cleaning filter in front, the reverse osmosis device is provided with an RO cartridge filter in front, and the UF self-cleaning filter and the backwash water of the RO cartridge filter go to the cleaning water treatment device.

Preferably, the ultrafiltration device and the concentrated water ultrafiltration device are provided with UF chemical cleaning devices, the UF chemical cleaning devices comprise UF cleaning water tanks, UF cleaning water pumps and UF cleaning filters which are sequentially connected, and the UF cleaning water tanks are externally connected with condensed water of the heating device to serve as cleaning water.

Preferably, the reverse osmosis device and the concentrated water reverse osmosis device are provided with RO chemical cleaning devices, the RO chemical cleaning devices comprise RO cleaning water tanks, RO cleaning water pumps and RO cleaning filters which are sequentially connected, and the RO cleaning water tanks are externally connected with condensed water of the heating device to serve as cleaning water.

Preferably, the heating device comprises a heat exchanger, a hydrophobic tank and a hydrophobic pump, wherein the heat exchanger is used for heating raw water, and condensed water of the heat exchanger is used for cleaning water by the UF chemical cleaning device and the RO chemical cleaning device.

The utility model has the following beneficial effects: the utility model adds the emission reduction process flow based on the conventional process flow, namely a chemical hard removing device, a concentrated water ultrafiltration device and a concentrated water reverse osmosis device, which are used for treating and recycling the high-concentration wastewater of the reverse osmosis device, so that the water utilization rate of the system is improved from 65% to 92%, thereby improving the water utilization rate of the system, improving the productivity, reducing the wastewater discharge and lowering the overall production cost.

Drawings

Fig. 1 is a functional block diagram of an embodiment of the present utility model.

FIG. 2 is a flow chart of a piping instrument of the heating apparatus in the embodiment of the present utility model.

FIG. 3 is a flow chart of a piping instrument of the chemical hardness removal device in an embodiment of the present utility model.

FIG. 4 is a flow chart of a piping instrument for cleaning a water treatment apparatus in an embodiment of the present utility model.

FIG. 5 is a flow chart of piping instrumentation of a UF chemical cleaning apparatus in an embodiment of the present utility model.

FIG. 6 is a flow chart of piping instrumentation of the RO chemical cleaning apparatus in an embodiment of the present utility model.

A raw water tank 1; heating device 2, heat exchanger 201, drain box 202, drain pump 203; an ultrafiltration device 3; a reverse osmosis device 4; a mixed bed device 5; chemical hardness removal device 6, pre-mixing tank 601, post-mixing tank 602, flocculation reaction tank 603, clarification tank 604, and pH adjusting tank 605; a concentrated water ultrafiltration device 7; a dense water reverse osmosis device 8; a cleaning water treatment device 9, a collection tank 901, a sand cylinder booster pump 902, a pipe mixer 903, and a filter sand cylinder 904; UF self-cleaning filter 10; RO cartridge filter 11; a UF chemical cleaning device 12, a UF cleaning water tank 1201, a UF cleaning water pump 1202, and a UF cleaning filter 1203; RO chemical cleaning apparatus 13, RO cleaning water tank 1301, RO cleaning water pump 1302, RO cleaning filter 1303.

Detailed Description

The utility model will be further described with reference to examples and drawings.

In the embodiment, as shown in fig. 1, the high-utilization-rate demineralized water production system comprises a raw water tank 1, a heating device 2, an ultrafiltration device 3, a reverse osmosis device 4 and a mixed bed device 5 which are sequentially communicated by pipelines and pumps, and further comprises a chemical hardness removal device 6, a concentrated water ultrafiltration device 7 and a concentrated water reverse osmosis device 8 which are sequentially communicated by pipelines and pumps, wherein the concentrated water chemical hardness removal device 6 of the reverse osmosis device 4, the produced water mixed bed device 5 of the concentrated water reverse osmosis device 8 and the concentrated water discharge of the concentrated water reverse osmosis device 8. The embodiment adds the emission reduction process flow based on the conventional process flow, namely adds the chemical hard removal device 6, the concentrated water ultrafiltration device 7 and the concentrated water reverse osmosis device 8, and is used for treating and recycling the high-concentration wastewater of the reverse osmosis device 4, so that the water utilization rate of the system is improved, the productivity is improved, the wastewater discharge is reduced, and the overall production cost is reduced. On the basis, the transformer of the embodiment adopts primary energy efficiency in the limit value and the energy efficiency grade of the power transformer (GB 20052-2020), the motor adopts secondary energy efficiency in the limit value and the energy efficiency grade of the motor (GB 18613-2020), and the running electricity consumption is reduced from the conventional 2.4 KWh/ton of desalted water to 1.5 KWh/ton of desalted water.

In the embodiment, as shown in fig. 1 and 3, the chemical hardness removal device 6 includes a front mixing tank 601, a rear mixing tank 602, a flocculation reaction tank 603, a clarification tank 604 and a PH adjusting tank 605, which are sequentially communicated. Wherein, sodium hydroxide is added into the pre-mixing tank 601 by a metering pump to aim at magnesium ions in reverse osmosis concentrated water; adding sodium carbonate and a flocculating agent into the post-mixing tank 602 by a metering pump to aim at calcium ions in reverse osmosis concentrated water; adding coagulant aid into a flocculation reaction tank 603 by a metering pump to perform flocculation polymerization; the clarifier 604 adopts inclined pipes or inclined plates for high-efficiency sedimentation; the pH adjusting tank 605 is neutralized by adding hydrochloric acid by a metering pump. The chemical hard removing device 6 carries out primary recovery treatment on the reverse osmosis concentrated water, is efficient, stable and reliable, outputs softened water, and can obviously reduce the burden of the subsequent concentrated water ultrafiltration device 7 and the concentrated water reverse osmosis device 8, thereby improving the overall energy efficiency of the reverse osmosis concentrated water recovery treatment.

In the embodiment, as shown in fig. 1 and 4, the device further comprises a cleaning water treatment device 9, wherein the backwash water and the flushing water of the ultrafiltration device 3, the flushing water of the reverse osmosis device 4 and the backwash water of the mixed bed device 5 are connected into the cleaning water treatment device 9 to clean the water treatment device 9, and the effluent of the cleaning water treatment device 9 is discharged to the ultrafiltration device 3. Specifically, the cleaning water treatment device 9 includes a collection tank 901, a sand cylinder booster pump 902, a pipe mixer 903 and a filter sand cylinder 904 connected; the pipe mixer 903 is used to add polyaluminum chloride for sterilization and the filter sand cylinder 904 is used to treat micro-scale contaminants. The washing water treatment device 9 recovers the washing water and the backwash water of each device, and enters the ultrafiltration device 3 for desalted water production after preliminary treatment, thereby reducing the discharge of sewage, further improving the water utilization rate of the system, and improving the water utilization rate of the system from 65% to 92% or even more.

In the embodiment, as shown in fig. 1, the ultrafiltration device 3 is provided with a UF self-cleaning filter 10, the reverse osmosis device 4 is provided with an RO cartridge filter 11, and the backwash water of the UF self-cleaning filter 10 and the RO cartridge filter 11 is used for cleaning the water treatment device 9. Similarly, backwash water of the UF self-cleaning filter 10 and the RO cartridge filter 11 is also treated by the cleaning water treatment device 9 to increase the system water utilization as much as possible.

In the embodiment, as shown in fig. 2, the heating device 2 includes a heat exchanger 201, a hydrophobic tank 202 and a hydrophobic pump 203, the heat exchanger 201 is used for heating raw water, and condensed water of the heat exchanger 201 goes to the UF chemical cleaning device 12 and the RO chemical cleaning device 13 to serve as cleaning water. As shown in fig. 5, the ultrafiltration device 3 and the concentrate ultrafiltration device 7 are provided with UF chemical cleaning devices 12, the UF chemical cleaning devices 12 include a UF cleaning water tank 1201, a UF cleaning water pump 1202 and a UF cleaning filter 1203, which are connected in this order, and the UF cleaning water tank 1201 is externally connected with condensed water of the heating device 2 as cleaning water. As shown in fig. 5, the reverse osmosis apparatus 4 and the concentrate reverse osmosis apparatus are provided with an RO chemical cleaning apparatus 13, and the RO chemical cleaning apparatus 13 includes an RO cleaning water tank 1301, an RO cleaning water pump 1302 and an RO cleaning filter 1303 which are connected in this order, and the RO cleaning water tank 1301 is externally connected with condensed water of the heating apparatus 2 as cleaning water. The proper temperature of the cleaning water can improve the effect of chemical cleaning, and a mode of introducing steam is generally adopted. In this embodiment, condensed water of the heat exchanger 201 is used as a main source of the UF chemical cleaning device 12 and the RO chemical cleaning device 13, and the deficient portion is replenished with water through the outside.

It is apparent that the above examples of the present utility model are merely illustrative of the present utility model and are not limiting of the embodiments of the present utility model. Other obvious variations or modifications which are extended by the spirit of the present utility model are within the scope of the present utility model.

Claims

1. The utility model provides a high utilization ratio demineralized water production system, includes former water tank (1), heating device (2), ultrafiltration device (3), reverse osmosis unit (4) and mixed bed device (5) that communicate in proper order by pipeline and pump, its characterized in that still includes chemical removal hard device (6), dense water ultrafiltration device (7) and dense water reverse osmosis unit (8) that communicate in proper order by pipeline and pump, the dense water of reverse osmosis unit (4) is removed chemical removal hard device (6), the product water of dense water reverse osmosis unit (8) is removed mixed bed device (5), the dense water of dense water reverse osmosis unit (8) is discharged outward.

2. The high-utilization demineralized water production system according to claim 1, wherein the chemical hardness removal device (6) comprises a front mixing tank (601), a rear mixing tank (602), a flocculation reaction tank (603), a clarification tank (604) and a PH adjusting tank (605) which are sequentially communicated.

3. The high-utilization-ratio demineralized water production system according to claim 1, further comprising a washing water treatment device (9), wherein backwash water and flushing water of the ultrafiltration device (3), flushing water of the reverse osmosis device (4) and backwash water of the mixed bed device (5) are connected to the washing water treatment device (9), and effluent water of the washing water treatment device (9) is connected to the ultrafiltration device (3).

4. A high-utilization demineralized water production system according to claim 3, characterized in that the wash water treatment means (9) comprises a collection tank (901), a sand cylinder booster pump (902), a pipe mixer (903) and a filter sand cylinder (904) connected.

5. A high-utilization demineralized water production system according to claim 3, characterized in that the ultrafiltration device (3) is preceded by a UF self-cleaning filter (10), the reverse osmosis device (4) is preceded by a RO cartridge filter (11), and the UF self-cleaning filter (10) and backwash water of the RO cartridge filter (11) go to the cleaning water treatment device (9).

6. A high-utilization demineralized water production system according to claim 3, characterized in that the ultrafiltration device (3) and the concentrate ultrafiltration device (7) are provided with a UF chemical cleaning device (12), the UF chemical cleaning device (12) comprising a UF cleaning water tank (1201), a UF cleaning water pump (1202) and a UF cleaning filter (1203) connected in sequence, the UF cleaning water tank (1201) being externally connected with condensed water of the heating device (2) as cleaning water.

7. The high-utilization-rate demineralized water production system according to claim 6, wherein the reverse osmosis device (4) and the concentrated water reverse osmosis device are provided with an RO chemical cleaning device (13), the RO chemical cleaning device (13) comprises an RO cleaning water tank (1301), an RO cleaning water pump (1302) and an RO cleaning filter (1303) which are sequentially connected, and the RO cleaning water tank (1301) is externally connected with condensed water of the heating device (2) as cleaning water.

8. The high-utilization-ratio demineralized water production system according to claim 7, wherein the heating device (2) comprises a heat exchanger (201), a drain tank (202) and a drain pump (203), the heat exchanger (201) is used for heating raw water, and condensed water of the heat exchanger (201) is used for cleaning water of the UF chemical cleaning device (12) and the RO chemical cleaning device (13).