CN214243999U

CN214243999U - Rural drinking water nanofiltration water purification device

Info

Publication number: CN214243999U
Application number: CN202022152950.XU
Authority: CN
Inventors: 赵飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-09-21
Anticipated expiration: 2030-09-27

Abstract

The utility model provides a rural drinking water nanofiltration water purification unit, it includes the raw water pump, preliminary treatment filter equipment, nanofiltration device and the product water pipeline that loop through the pipe connection, a serial communication port preliminary treatment filter equipment comprises many medium filter, active carbon filter, precision filter, connects through the pipeline respectively each other, during its rear end drenches the nanofiltration device with water through the high-pressure pump, be equipped with the nanofiltration membrane in this nanofiltration device, carry out water purification through the nanofiltration membrane, reach the product water standard, it can rely on thing networking module to realize unmanned on duty and journey monitoring function, reduce the use of manpower, reduce cost.

Description

Rural drinking water nanofiltration water purification device

Technical Field

The utility model relates to a rural drinking water nanofiltration water purification device, which belongs to the water treatment field.

Background

As drinking water treatment facilities in rural areas of China are generally simple and crude, pesticides and fertilizers are close to farmlands in some water source areas, water quality is affected, water sources directly enter a water supply network to farmers, and water quality is difficult to guarantee. Drinking water in rural areas of China faces several problems:

1. drinking water in rural areas has various water sources, such as spring water, underground water, river water, lake water and the like, has various water qualities, and has various projects for exceeding the standard of water quality detection;

2. the process is laggard, the treatment process adopted by the existing rural drinking water is simpler, and the water quality safety is difficult to guarantee because the treatment process is generally a coagulating sedimentation and dosing device;

3. the microorganisms are serious in standard exceeding, and the microorganisms such as escherichia coli and the like in water are bred and can not meet the requirements of national standards;

4. the ultrafiltration process is adopted in individual places, but the ultrafiltration membrane cannot remove heavy metal ions and chemical substances in the water;

the defects of the currently adopted water treatment equipment are as follows:

1. traditional coagulating sedimentation integration water purification unit:

(1) the traditional coagulating sedimentation filtration method has serious overproof microorganisms;

(2) the traditional coagulating sedimentation filtration has the disadvantages that the excessive microorganism dosage is serious, and the dosage is large;

(3) the traditional coagulating sedimentation filtration method has the defects that microorganisms exceed standards and the water quality is unstable seriously;

2. ultrafiltration water purification equipment

(1) External pressure ultrafiltration membrane water purification equipment made of PVDF (polyvinylidene fluoride) needs air washing, so that the equipment needs to be provided with parts such as an air compressor, a cold dryer, a gas storage tank, valve pipe fittings and the like, the equipment cost is high, and the occupied area is large;

(2) the internal pressure ultrafiltration membrane equipment made of PS material is easy to pollute and block and the flux is easy to reduce because the equipment cannot be washed by air;

(3) the internal pressure of PS material and the external pressure ultrafiltration membrane water purification equipment of PVDF material both need backwashing, so a backwashing pump is needed, and the investment cost is increased;

(4) due to the internal pressure of the PS material and the filtering precision of the nanofiltration membrane used by the PVDF external pressure ultrafiltration membrane water purification equipment, metal ions cannot be removed by the nanofiltration membrane;

(5) the ceramic membrane ultrafiltration membrane water purification equipment has high cost, and is difficult to bear by a general government unit.

Disclosure of Invention

The utility model aims to solve the technical problem that the treatment process of drinking water in rural areas falls behind and the water quality does not reach the standard, simultaneously solve the problems that internal pressure and external pressure ultrafiltration membrane water purification equipment needs air washing, the process is complicated, the cost is high, the energy consumption is large, the occupied area is large, and invent a water-saving, energy-saving, low-cost, simple process, unattended, automatic operation nanofiltration water purification equipment with self-purification function.

The utility model aims at realizing through the following technical scheme: a drinking water nanofiltration water purification device in rural areas comprises a raw water pump, a pretreatment filter device, a nanofiltration device and a clear water tank which are sequentially connected through pipelines, wherein the filter device consists of a multi-medium filter, an active carbon filter and a precision filter which are respectively connected through pipelines, the rear end of the filter device injects water into the nanofiltration device through a high-pressure pump, a high-precision roll type nanofiltration membrane made of polyamide materials is arranged in the nanofiltration device, the water quality is purified through the nanofiltration membrane, two pipelines are arranged behind the nanofiltration device, and clear water reaching the discharge standard passes through one pipeline and then enters the clear water tank through a water production pipe, a pressure gauge, a manual butterfly valve, a water production electric butterfly valve and an electromagnetic flow meter; dense water passes through behind another pipeline through dense water branch pipe, dense water main pipe discharge tube way again, and the electric butterfly valve is discharged to dense water, discharges into the drainage canal, still be equipped with check valve, pressure transmitter, manometer on the pipeline between raw water pump and the multi-media filter, be equipped with automatic multiple unit valve on the pipeline that multi-media filter, active carbon filter connect, raw water pump, electric butterfly valve open by the electric control system control.

Preferably, the method comprises the following steps: a NaClO dosing pump is arranged on a pipeline behind the nanofiltration device of the nanofiltration water purification device, and liquid medicine in the NaClO dosing pump is added into a water production pipeline and enters a clear water tank to inhibit bacteria.

Preferably, the method comprises the following steps: the chemical cleaning device is characterized in that a chemical cleaning device is further arranged on the outer side of the nanofiltration device, the chemical cleaning device connects a chemical cleaning water tank, a chemical cleaning pump, a check valve, a manual valve, a pressure gauge, a chemical cleaning precision filter and the like through pipelines, the chemical cleaning precision filter is connected into the nanofiltration device through a pipeline, the purpose of cleaning the nanofiltration membrane and recovering the performance of the nanofiltration membrane is achieved by flushing, soaking and cleaning the nanofiltration membrane in the nanofiltration device, and the nanofiltration device is further provided with a backflow pipeline which can enable chemical cleaning backflow liquid after cleaning to flow back into the chemical cleaning water tank through the backflow pipeline.

The utility model selects the multi-medium filter, the activated carbon filter, the precision filter, the nanofiltration membrane system and the medicine adding process, and ensures the water quality by multi-stage filtration; by comparison in many aspects, the nanofiltration membrane with excellent performance and economic cost is determined to be selected; the nanofiltration water purification equipment can realize unattended operation and remote monitoring functions by depending on the Internet of things module, so that the use of manpower is reduced, and the cost is reduced; the nanofiltration membrane has higher filtration precision and can remove redundant salt in water.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The utility model will be described in detail with reference to the accompanying drawings, as shown in figure 1, the utility model relates to a drinking water nanofiltration water purification device for rural areas, which comprises a raw water pump 1, a pretreatment filter device 2, a nanofiltration device 3 and a clear water tank 4 which are connected in sequence through pipelines, the pretreatment filtering device 2 consists of a multi-medium filter 5, an activated carbon filter 6 and a precision filter 7 which are connected with each other through a pipeline 8, the rear end of the nano-filtration device is filled with water into a nano-filtration device 3 through a high-pressure pump 9, a high-precision rolled nano-filtration membrane 10 made of polyamide is arranged in the nano-filtration device 3, the water quality is purified by a nanofiltration membrane 10, two pipelines are arranged behind the nanofiltration device 3, and clean water reaching the discharge standard passes through one pipeline and then enters a clean water tank 4 through a water production pipe 11, a pressure gauge 12, a manual butterfly valve 13, a water production electric butterfly valve 14 and an electromagnetic flow meter 15; the concentrated water passes through another pipeline, then passes through a concentrated water branch pipe 17 and a concentrated water main pipe discharge pipeline 18, and is discharged into a drainage channel 20 through an electric butterfly valve 19. A check valve 21, a pressure transmitter 22 and a pressure gauge 23 are further arranged on a pipeline between the raw water pump 1 and the multi-media filter 5, an automatic multi-way valve 36 is arranged on a pipeline connected with the multi-media filter 5 and the activated carbon filter 6, the raw water pump 1 and the electric butterfly valve 14 are controlled by an electric control system 24, a NaClO dosing pump 25 is arranged on a pipeline behind the nanofiltration device, the liquid medicine in the NaClO dosing pump 25 is filled into the water production pipe 11 and enters the clear water tank 4 to inhibit the generation of bacteria, a chemical cleaning device 35 is further arranged on the outer side of the nanofiltration device 3, the chemical cleaning device 35 connects a chemical cleaning water tank 28, a chemical cleaning pump 29, a check valve 30, a manual valve 31, a pressure gauge 32, a chemical cleaning precision filter 33 and the like together through pipelines, the chemical cleaning precision filter 33 is connected into the nanofiltration device 3 through pipelines, the nanofiltration membrane 10 in the nanofiltration device 3 is washed, soaked and cleaned to achieve the purposes of cleaning the nanofiltration membrane and recovering the performance of the nanofiltration membrane, the nanofiltration device 3 is also provided with a backflow pipeline 34, and the chemical cleaning backflow liquid after cleaning can flow back to the chemical cleaning water tank 28 through the backflow pipeline 34.

The specific working principle is as follows:

(1) normal water production working process:

a raw water supply pump pumps water from a raw water tank or a raw water pool (the starting and stopping of the raw water pump is in linkage control with the liquid level of the raw water tank or the raw water pool, and the high liquid level can be started); the water flow sequentially passes through a check valve, a pressure transmitter and a pressure gauge raw water, reaches an automatic multi-way valve (a multi-channel valve for changing the flow direction of the water flow is also called an automatic controller and an automatic head) of the multi-media filter, and enters a water inlet of the multi-media filter through the automatic multi-way valve; after being filtered by the multi-media filter, the water flow passes through the automatic multi-way valve of the multi-media filter again and then enters the water inlet of the automatic multi-way valve of the activated carbon filter from the water outlet of the automatic multi-way valve; then the water enters an activated carbon filter, after being filtered by the activated carbon filter, the water flows back to the automatic multi-way valve and enters the precision filter from an outlet of the automatic multi-way valve of the activated carbon filter; on the pipeline entering the precision filter, a pipeline branch is connected with a NaClO dosing pump and is used for dosing in the pipeline, inhibiting the growth of bacteria and playing a role in sterilization; the water flow enters a water inlet at the lower end of the nanofiltration main body equipment from an outlet of the precision filter through a valve and a pipeline, and purified water flows out of two water producing ports on the side surface through the physical filtering action of the nanofiltration membrane, and then enters a clear water tank through a water producing pipe, a pressure gauge, a manual butterfly valve, a water producing electric butterfly valve, an electromagnetic flowmeter and the like; the concentrated water of the nanofiltration system passes through a concentrated water branch pipe and a concentrated water main pipe discharge pipeline, and the concentrated water is discharged into a drainage channel by an electric butterfly valve.

(2) The forward washing process comprises the following steps:

the flow direction of water flow in the forward washing process is completely consistent with the flow direction of normal produced water, only a forward washing discharge valve on a water production pipeline is opened, so that the cleaning liquid is discharged into a sewer, and a water production electric butterfly valve is closed, so that the cleaning liquid cannot enter a clear water tank.

(3) And (3) chemical cleaning process:

1) chemical cleaning process

a. Preparing a prepared chemical agent in a chemical cleaning water tank;

b. the raw water supply pump and the high-pressure pump are in a stop state;

c. manually opening a chemical cleaning water inlet valve of a water inlet bypass of the nanofiltration main body device, and chemical cleaning liquid return valves on the water production main pipe and the concentrated water main pipe;

d. then starting a chemical cleaning pump;

e. the chemical cleaning liquid sequentially passes through a chemical cleaning pump, a check valve, a chemical cleaning precision filter, a nanofiltration system water inlet main pipe and a nanofiltration membrane element water inlet and enters a nanofiltration membrane element;

f. soaking and cleaning the nanofiltration membrane element;

g. the chemical cleaning reflux liquid flows back to the chemical cleaning water tank through a chemical cleaning liquid return valve on the concentrated water main pipe;

2) chemical cleaning agent stirring

a. Preparing a prepared chemical agent in a chemical cleaning water tank;

b. the raw water supply pump and the high-pressure pump are in a stop state;

c. then starting a chemical cleaning pump;

d. the chemical cleaning liquid enters the chemical cleaning water tank through a chemical cleaning pump, a check valve and an ejector in sequence;

e. stirring the medicament;

the utility model has the advantages that:

1. selecting a multi-media filter, an activated carbon filter, a precision filter, a nanofiltration membrane system and a dosing process;

2. the equipment adopts a remote monitoring system and an Internet of things system, realizes unattended operation and reduces the operation cost;

3. the nanofiltration membrane is used, so that air washing and backwashing are not needed, and the investment cost and the operation cost of equipment are reduced;

4. the nanofiltration membrane has high filtration precision, can remove most heavy metal ions in water, and can remove impurities such as turbidity, hardness, microorganisms, viruses and the like.

Claims

1. A drinking water nanofiltration water purification device in rural areas comprises a raw water pump, a pretreatment filter device, a nanofiltration device and a clear water tank which are sequentially connected through pipelines, and is characterized in that the pretreatment filter device consists of a multi-medium filter, an activated carbon filter and a precision filter, which are connected with one another through pipelines, the rear end of the pretreatment filter device is used for introducing water into the nanofiltration device through a high-pressure pump, a high-precision rolled nanofiltration membrane made of polyamide materials is arranged in the nanofiltration device, the water quality is purified through the nanofiltration membrane, two pipelines are arranged behind the nanofiltration device, and clear water reaching the discharge standard passes through one pipeline and then enters the clear water tank through a water production pipe, a pressure gauge, a manual butterfly valve, a water production electric butterfly valve and an electromagnetic flow meter; dense water passes through behind another pipeline through dense water branch pipe, dense water main pipe discharge tube way again, and the electric butterfly valve is discharged to dense water, discharges into the drainage canal, still be equipped with check valve, pressure transmitter, manometer on the pipeline between raw water pump and the multi-media filter, be equipped with automatic multiple unit valve on the pipeline that multi-media filter, active carbon filter connect, raw water pump, electric butterfly valve open by the electric control system control.

2. The nanofiltration water purification device for rural drinking water according to claim 1, wherein a NaClO dosing pump is arranged on a pipeline behind the nanofiltration device, and liquid medicine in the NaClO dosing pump is added into a water production pipeline and enters a clean water tank to inhibit the generation of bacteria.

3. The device for nanofiltration water purification of rural drinking water according to claim 1, wherein a chemical cleaning device is further disposed outside the nanofiltration device, the chemical cleaning device connects a chemical cleaning water tank, a chemical cleaning pump, a check valve, a manual valve, a pressure gauge, and a chemical cleaning precision filter through a pipeline, the chemical cleaning precision filter is connected to the nanofiltration device through a pipeline, and the nanofiltration device is further provided with a backflow pipeline, so that the chemical cleaning backflow liquid after cleaning can flow back to the chemical cleaning water tank through the backflow pipeline.