A desalination system for increasing water production

Abstract

The utility model discloses a kind of desalted water systems of improving water production capacity, including the multiple medium filter of sequentially connecting, filter pond, self-cleaning filter, ultrafiltration device, security filter and reverse osmosis unit;High-pressure pump is provided on the connecting pipeline between security filter and reverse osmosis unit;Zhuangli water source is connected with multiple medium filter, and reverse osmosis unit is connected with desalted water station;Reverse osmosis unit is connected with multiple medium filter through first backwashing pipeline, to use the concentrated water filtered by reverse osmosis unit for the backwashing of multiple medium filter;The sewage generated by multiple medium filter, self-cleaning filter and ultrafiltration device is uniformly discharged to fluorine-removing rear end through sewage collection pipeline system.Occupation is: the water quantity gap caused by water source change is supplemented by the fresh water produced for desalted water station, and when using Zhuangli water source, the water production of desalted water can meet production needs, eliminate the influence brought by water source change.

Description

Technical Field

[0001] This utility model relates to the field of demineralized water technology, and in particular to a demineralized water system that improves water production capacity. Background Technology

[0002] A chemical plant's demineralized water system uses ion exchange technology. Since its operation, the system has been using water from the Yanma Reservoir, with a water production capacity of 260 m³. 3 / h, the demineralized water consumption of the production system is 230m³. 3 The demineralized water system is sufficient to meet the usage requirements at a rate of / h.

[0003] To alleviate the pressure on the water supply from Yanma Reservoir, it is necessary to change the water source from Yanma Reservoir to Zhuangli Water Source. However, because the ion exchange process uses an anion exchange bed + mixed bed process, the desalination station's water production capacity decreases by about 50% after switching to Zhuangli Water Source due to the increased raw water salt content. This causes frequent regeneration of the anion exchange bed, making it impossible to meet normal production water needs. The operating status of the desalination station after the water source change is shown in the table below. When using Zhuangli Water Source, the water production capacity of a single unit of the desalination station decreases by about 50 m³ / h. In the two-operation-one-standby mode, the water production capacity decreases from 260 m³ / h. 3 / h reduced to 160m 3 / h, the water shortage is 100m³ 3 / h.

[0004]

[0005] Therefore, it is urgent to upgrade the demineralized water system to increase its water production capacity so that it can meet the demineralized water demand of the production system when using Zhuangli water source. Utility Model Content

[0006] The purpose of this invention is to provide a demineralized water system that improves water production capacity, thereby solving the aforementioned problems in the prior art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A demineralized water system for improving water production capacity includes a multi-media filter, a filtration tank, a self-cleaning filter, an ultrafiltration device, a security filter, and a reverse osmosis unit connected in sequence. A high-pressure pump is installed on the connecting pipe between the security filter and the reverse osmosis unit. A water source is connected to the multi-media filter, and the reverse osmosis unit is connected to the demineralized water station. The fresh water produced after the water source passes through the multi-media filter, filtration tank, self-cleaning filter, ultrafiltration device, security filter, and reverse osmosis unit in sequence is supplied to the demineralized water station. The reverse osmosis unit is connected to the multi-media filter via a first backwash pipe so that the concentrated water produced by the reverse osmosis unit is used for backwashing the multi-media filter. Wastewater produced by the multi-media filter, the self-cleaning filter, and the ultrafiltration device is discharged to the defluorination end via a wastewater collection pipe.

[0009] Preferably, the system further includes a raw water tank, a filtration tank, an ultrafiltration tank, and a freshwater tank; the Zhuangli water source is connected to the multi-media filter via the raw water tank, and a booster pump is installed on the connecting pipe between the raw water tank and the multi-media filter; the multi-media filter is connected to the self-cleaning filter via the filtration tank, and an ultrafiltration inlet pump is installed on the connecting pipe between the filtration tank and the self-cleaning filter; the ultrafiltration device is connected to the security filter via the ultrafiltration tank, and a booster pump is installed on the connecting pipe between the ultrafiltration tank and the security filter; the reverse osmosis unit is connected to the demineralized water station via the freshwater tank, and a freshwater pump is installed on the connecting pipe between the freshwater tank and the demineralized water station.

[0010] Preferably, the system further includes a concentrate tank, which is connected to the reverse osmosis unit and the multi-media filter via a first backwash pipe, and a concentrate pump is installed on the first backwash pipe between the concentrate tank and the multi-media filter.

[0011] Preferably, the freshwater tank is connected to the reverse osmosis unit via a second backwash pipe, so as to use the water in the freshwater tank to backwash the reverse osmosis unit; a dosing device is provided on the second backwash pipe.

[0012] Preferably, the ultrafiltration water tank is connected to the ultrafiltration device via a third backwash pipe, so as to use the ultrafiltration water in the ultrafiltration water tank to backwash the ultrafiltration device; a dosing device is provided on the third backwash pipe.

[0013] Preferably, a total of five multi-media filters are installed, and they are operated in a four-on-one-standby mode.

[0014] Preferably, two units are provided for each of the self-cleaning filter, the ultrafiltration device, and the reverse osmosis device.

[0015] The beneficial effects of this invention are as follows: 1. The system has a freshwater production capacity of 150 m³ / h, which is used to supplement the 100 m³ / h water shortage caused by changes in the water source at the demineralized water station. When using the Zhuangli water source, the demineralized water production capacity can meet production needs, eliminating the impact of changes in the water source. 2. The multi-media filter can remove suspended solids from the water source. The self-cleaning filter serves as a guarantee for the quality of the feed water for subsequent ultrafiltration. The ultrafiltration device can remove impurities such as colloids and microorganisms from the water, preventing contamination of the subsequent reverse osmosis unit. The security filter acts as a preventative barrier to ensure the quality of the feed water for reverse osmosis. The reverse osmosis unit can retain almost all dissolved salts in the water, thereby producing qualified brine for downstream use. 3. The concentrated water produced by the reverse osmosis unit is used for backwashing the multi-media filter, and the water in the freshwater tank and ultrafiltration tank is used to backwash the reverse osmosis unit and ultrafiltration device respectively, improving the water recovery rate. 4. A dosing device is added during the backwashing process to reduce the tendency for fouling and scaling in the system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the demineralized water system in an embodiment of this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0018] like Figure 1 As shown in this embodiment, a demineralized water system with enhanced water production capacity is provided, comprising a multi-media filter, a filtration tank, a self-cleaning filter, an ultrafiltration device, a security filter, and a reverse osmosis unit connected in sequence; a high-pressure pump is installed on the connecting pipe between the security filter and the reverse osmosis unit; the Zhuangli water source is connected to the multi-media filter, and the reverse osmosis unit is connected to the demineralized water station. The fresh water produced after the Zhuangli water source passes through the multi-media filter, filtration tank, self-cleaning filter, ultrafiltration device, security filter, and reverse osmosis unit in sequence is supplied to the demineralized water station; the reverse osmosis unit is connected to the multi-media filter via a first backwash pipe so that the concentrated water produced by the reverse osmosis unit is used for backwashing the multi-media filter; the wastewater produced by the multi-media filter, the self-cleaning filter, and the ultrafiltration device is discharged to the defluorination end via a wastewater collection pipe.

[0019] In this embodiment, a multi-media filter serves as the first barrier in the incoming water treatment process, with a filtration accuracy of approximately 5-50 μm, capable of removing suspended solids from the water source. A self-cleaning filter, with a filtration accuracy of 100 μm, acts as a safeguard for the quality of the feed water to the subsequent ultrafiltration unit. The ultrafiltration device, with a filtration accuracy of 0.01-0.1 μm, removes impurities such as colloids and microorganisms from the water, preventing contamination of the subsequent reverse osmosis unit. A security filter, with an accuracy of 5 μm, acts as a preventative barrier to ensure the quality of the feed water for reverse osmosis. The reverse osmosis unit can achieve a filtration accuracy of 0.0001 μm, effectively trapping almost all dissolved salts in the water.

[0020] The system also includes a raw water tank, a filtration tank, an ultrafiltration tank, and a freshwater tank. The Zhuangli water source is connected to the multi-media filter via the raw water tank, and a booster pump is installed on the connecting pipe between the raw water tank and the multi-media filter. The multi-media filter is connected to the self-cleaning filter via the filtration tank, and an ultrafiltration inlet pump is installed on the connecting pipe between the filtration tank and the self-cleaning filter. The ultrafiltration device is connected to the security filter via the ultrafiltration tank, and a booster pump is installed on the connecting pipe between the ultrafiltration tank and the security filter. The reverse osmosis unit is connected to the demineralized water station via the freshwater tank, and a freshwater pump is installed on the connecting pipe between the freshwater tank and the demineralized water station.

[0021] After being buffered in the raw water tank, the incoming water is boosted by a pump to a multi-media filter. After initial filtration by the multi-media filter, it enters the filtration tank, and is then boosted by an ultrafiltration inlet pump. After passing through a self-cleaning filter, it enters the ultrafiltration unit, completing the water pretreatment. The effluent from the ultrafiltration unit enters the ultrafiltration tank, is boosted by a pump to a security filter, and the effluent from the security filter is pumped by a high-pressure pump to the reverse osmosis unit. After 99% of the salt is removed by reverse osmosis, the permeate enters the freshwater tank and is then pumped to the downstream section (demineralized water station).

[0022] In this embodiment, the system also includes a concentrate tank, which is connected to the reverse osmosis unit and the multi-media filter via a first backwash pipe. A concentrate pump is installed on the first backwash pipe between the concentrate tank and the multi-media filter.

[0023] The freshwater tank is connected to the reverse osmosis unit via a second backwash pipe, so as to use the water in the freshwater tank to backwash the reverse osmosis unit; a dosing device is installed on the second backwash pipe.

[0024] The ultrafiltration water tank is connected to the ultrafiltration device via a third backwash pipe, so as to use the ultrafiltration water in the ultrafiltration water tank to backwash the ultrafiltration device; a dosing device is installed on the third backwash pipe.

[0025] To improve water utilization, the concentrated water produced by the reverse osmosis unit is used for backwashing the multi-media filter, increasing the overall recovery rate to 66%. To extend the service life of the ultrafiltration unit and reverse osmosis unit, a dosing device is installed to add scale inhibitors, bactericides, etc., reducing the tendency for fouling and scaling in the system.

[0026] In this embodiment, a total of five multi-media filters are provided, with a four-on-one-backup operation mode. Two self-cleaning filters, two ultrafiltration devices, and two reverse osmosis devices are provided.

[0027] By adopting the above-disclosed technical solution of this utility model, the following beneficial effects are obtained:

[0028] This invention provides a demineralized water system to enhance water production capacity. The system has a freshwater production capacity of 150 m³ / h, which is used to supplement the 100 m³ / h water shortage caused by changes in the water source at the demineralized water station. When using the Zhuangli water source, the demineralized water production capacity can meet production needs, eliminating the impact of water source changes. A multi-media filter removes suspended solids from the water source, a self-cleaning filter ensures the quality of the feed water for subsequent ultrafiltration, and the ultrafiltration unit removes colloids and microorganisms to prevent contamination of the subsequent reverse osmosis unit. A security filter acts as a preventative barrier to ensure the quality of the feed water for reverse osmosis. The reverse osmosis unit retains almost all dissolved salts in the water, producing qualified demineralized water for downstream use. The concentrated water from the reverse osmosis unit is used for backwashing the multi-media filter, and water from the freshwater tank and ultrafiltration tank is used to backwash the reverse osmosis unit and ultrafiltration unit respectively, improving water recovery rate. A chemical dosing device is added during the backwashing process to reduce the tendency for fouling and scaling within the system.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A demineralized water system for improving water production capacity, characterized in that: The system includes a multi-media filter, a filtration tank, a self-cleaning filter, an ultrafiltration unit, a security filter, and a reverse osmosis unit connected in sequence. A high-pressure pump is installed on the connecting pipe between the security filter and the reverse osmosis unit. The Zhuangli water source is connected to the multi-media filter, and the reverse osmosis unit is connected to the demineralized water station. The fresh water produced after the Zhuangli water source passes through the multi-media filter, filtration tank, self-cleaning filter, ultrafiltration unit, security filter, and reverse osmosis unit in sequence is supplied to the demineralized water station. The reverse osmosis unit is connected to the multi-media filter via a first backwash pipe so that the concentrated water produced by the reverse osmosis unit is used for backwashing the multi-media filter. The wastewater produced by the multi-media filter, the self-cleaning filter, and the ultrafiltration unit is discharged into the defluorination terminal via a wastewater collection pipe.

2. The demineralized water system for improving water production capacity according to claim 1, characterized in that: The system also includes a raw water tank, a filtration tank, an ultrafiltration tank, and a freshwater tank. The Zhuangli water source is connected to the multi-media filter via the raw water tank, and a booster pump is installed on the connecting pipe between the raw water tank and the multi-media filter. The multi-media filter is connected to the self-cleaning filter via the filtration tank, and an ultrafiltration inlet pump is installed on the connecting pipe between the filtration tank and the self-cleaning filter. The ultrafiltration device is connected to the security filter via the ultrafiltration tank, and a booster pump is installed on the connecting pipe between the ultrafiltration tank and the security filter. The reverse osmosis unit is connected to the demineralized water station via the freshwater tank, and a freshwater pump is installed on the connecting pipe between the freshwater tank and the demineralized water station.

3. The demineralized water system for improving water production capacity according to claim 2, characterized in that: The system also includes a concentrate tank, which is connected to the reverse osmosis unit and the multi-media filter via a first backwash pipe. A concentrate pump is installed on the first backwash pipe between the concentrate tank and the multi-media filter.

4. The demineralized water system for improving water production capacity according to claim 2, characterized in that: The freshwater tank is connected to the reverse osmosis unit via a second backwash pipe, so as to use the water in the freshwater tank to backwash the reverse osmosis unit; a dosing device is installed on the second backwash pipe.

5. The demineralized water system for improving water production capacity according to claim 2, characterized in that: The ultrafiltration water tank is connected to the ultrafiltration device via a third backwash pipe, so as to use the ultrafiltration water in the ultrafiltration water tank to backwash the ultrafiltration device; a dosing device is installed on the third backwash pipe.

6. The demineralized water system for improving water production capacity according to any one of claims 1 to 5, characterized in that: A total of five multi-media filters are installed, operating in a four-on-one-standby mode.

7. The demineralized water system for improving water production capacity according to claim 6, characterized in that: Two units are each of the self-cleaning filter, the ultrafiltration device, and the reverse osmosis device.

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