CN210145851U

CN210145851U - Efficient water-saving system for circulating water pollution discharge

Info

Publication number: CN210145851U
Application number: CN201922337161.0U
Authority: CN
Inventors: 徐清华; 张强; 廖俊涛; 陈刚; 李海臣; 王卫; 王光祥
Original assignee: SHANDONG LANXIANG ENVIRONMENTAL TECHNOLOGY Co Ltd
Current assignee: SHANDONG LANXIANG ENVIRONMENTAL TECHNOLOGY Co Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-03-17
Anticipated expiration: 2029-12-24

Abstract

The utility model discloses a high-efficiency water-saving system for circulating water sewage disposal, which belongs to the technical field of recycling of circulating sewage after deep treatment, and comprises an ultrafiltration system and a reverse osmosis system, wherein the ultrafiltration system and the reverse osmosis system are both connected with the same cleaning equipment, an electrodialysis system is arranged between the ultrafiltration system and the reverse osmosis system for communication, and the electrodialysis is connected with a discharge device; the utility model uses electrodialysis as preliminary desalination after the electrodialysis device ultrafiltration and before the reverse osmosis, adds acid to the ultrafiltration inlet water to adjust the PH value to about 6.8, and adjusts the acidity of the water to reduce the reverse osmosis and the calcification of the electrodialysis; reverse osmosis is used as accurate desalination after the electrodialysis, and the demineralized water retrieval and utilization is to circulating water moisturizing, and reverse osmosis does not set up antisludging agent charge device, can reduce water treatment cost, and ultrafiltration and reverse osmosis share a set of chemical cleaning device simultaneously, both reduce cost and drop into, reduce area again.

Description

Efficient water-saving system for circulating water pollution discharge

Technical Field

The utility model relates to a retrieval and utilization technical field behind the advanced treatment of circulation blowdown, concretely relates to high-efficient water saving system of circulation blowdown.

Background

China is one of countries with poor water resources in the world, is the country with the most water consumption, and is also one of the countries with the most serious water resource waste. The total amount of water resources in China only accounts for 6% of the total amount of the runoff resources in the world, and the per-capita water resource occupancy is 1/4 of the average value in the world. With the rapid development of economy and the promotion of modernization process in China, the industrial water consumption is rapidly increased, and the contradiction between the increase of the water demand of China and the limited water resource is more and more prominent. According to statistics, the reuse rate of industrial water in China is 30% -40%, the practical possibility is lower, and the reuse rate of industrial water in developed countries is 75% -85%. The method has the advantages of high waste of water resources in the industrial field of China, low water resource utilization rate compared with the international advanced level, obvious research on industrial water saving problems, development of a new water saving technology, improvement of the water recycling rate, reduction of the industrial water consumption and important practical significance.

Disclosure of Invention

To the problem that exists among the prior art, the utility model provides a high-efficient water saving system of circulating water blowdown, with electrodialysis put behind the ultrafiltration reverse osmosis before, the electrodialysis is as preliminary desalination, with the ultrafiltration intake add acid and adjust PH to about 6.8, can reduce reverse osmosis and electrodialysis production calcification with water modulation acidity; reverse osmosis is used as accurate desalination after the electrodialysis, and the demineralized water retrieval and utilization is to circulating water moisturizing, and reverse osmosis does not set up antisludging agent charge device, can reduce water treatment cost, and ultrafiltration and reverse osmosis share a set of chemical cleaning device simultaneously, both reduce cost and drop into, reduce area again.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

the utility model provides a high-efficient water saving system of circulating water blowdown, includes ultrafiltration circulating system and reverse osmosis system, ultrafiltration system and reverse osmosis system all are connected with same cleaning equipment, be equipped with electrodialysis system intercommunication between ultrafiltration system and the reverse osmosis system, the electrodialysis system connection has discharge apparatus.

Preferably, the ultrafiltration system includes former water tank and bag filter, be equipped with the former water pump intercommunication between former water tank and the bag filter, the bag filter is connected with ultrafiltration membrane module, ultrafiltration membrane module is connected with ultrafiltration water tank and cleaning equipment, ultrafiltration water tank is connected with the electrodialysis system.

Preferably, the electrodialysis system includes the electrodialysis power, the electrodialysis power is connected with the electrodialysis membrane stack, be equipped with electrodialysis fresh water intake pump intercommunication between electrodialysis membrane stack and the ultrafiltration water tank, the electrodialysis membrane stack is connected with electrodialysis concentrate tank and electrodialysis production water tank, the electrodialysis concentrate tank is linked together with discharge apparatus, electrodialysis production water tank and reverse osmosis system intercommunication.

Preferably, the electrodialysis power supply adopts a high-frequency conducting switch power supply, and provides stable and adjustable current and voltage for the electrodialysis membrane stack, so that salt can be directionally transferred in the membrane stack; the electrodialysis membrane stack consists of electrodes, a cation exchange membrane, an anion exchange membrane and a partition plate, ions are directionally transferred under the action of a direct current electric field, and salt in the fresh water chamber is enriched in the concentrated water chamber across the ion exchange membrane, so that the aim of desalting is fulfilled.

Preferably, the ultrafiltration water tank is connected with an acid adding system, and the pH of the ultrafiltration water tank is adjusted to 6.5-7.0 by adding acid, so that the calcification of an electrodialysis membrane in the electrodialysis process can be effectively prevented.

Preferably, the reverse osmosis system comprises a booster pump, a cartridge filter, a high-pressure pump, a reverse osmosis membrane module and the like, the booster pump sends water from the electrodialysis water production tank to the cartridge filter, the filtered water is sent to the reverse osmosis membrane module by the high-pressure pump, the outlet water of the cartridge filter is pumped into the reverse osmosis membrane module through the high-pressure pump, the outlet water of the reverse osmosis membrane module returns to be used as circulating water for replenishing water to the ultrafiltration water tank, and in order to improve the overall recovery rate of the system, the concentrated water of the reverse osmosis membrane module enters the electrodialysis concentrated water tank.

The utility model has the advantages of that:

1. the utility model discloses adopt ultrafiltration cross-flow backward flow technique in the ultrafiltration process, make the ultrafiltration module ultrafiltration in-process produce the cross-flow and strike and flow back into former water tank to the ultrafiltration membrane module, can avoid the granule to block up ultrafiltration membrane module, be favorable to improving filtration efficiency, the demineralized water that is handled through reverse osmosis system simultaneously carries out the moisturizing as circulating water retrieval and utilization to ultrafiltration water tank, can improve industrial water reuse rate, reduces environmental pollution, reduces the impact that the change of industrial drainage volume caused municipal sewage plant.

2. The utility model discloses in add sour system and intake ultrafiltration and add sour regulation PH to about 6.8, can prevent among the electrodialysis system electrodialysis membrane calcification, can effectively improve the life of electrodialysis system, adopt the electrodialysis system can get rid of former aquatic 40% -60% salt, be favorable to reducing reverse osmosis equipment's desalination load, make reverse osmosis water hardness decline, consequently reverse osmosis system need not like traditional two embrane methods, prevent the scale deposit through adding antisludging agent, reduce cost.

3. The utility model discloses in produce the dense water of reverse osmosis system production and electrodialysis system self and all lead-in electrodialysis dense water case and follow the heavy water diversion of ultrafiltration water case and dilute back and lead-in electrodialysis membrane pile again and carry out the circulation electrodialysis, can effectively get rid of the pollutant in the dense water, can effectively reduce the pollutant in the sewage, be favorable to reducing the harmfulness of outer arranging sewage.

Drawings

Fig. 1 is a flow chart of the overall process of the efficient water-saving system for circulating water sewage disposal of the present invention.

In the figure: the device comprises a raw water tank 1, a raw water pump 2, a bag filter 3, an ultrafiltration membrane component 4, an ultrafiltration water tank 5, an acid adding system 6, an electrodialysis membrane stack 7, an electrodialysis production water tank 8, an electrodialysis concentrated water tank 9, a cartridge filter 10, a reverse osmosis membrane component 11, a discharge device 12 and a cleaning device 13.

Detailed Description

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

The efficient water-saving system for circulating water pollution discharge shown in fig. 1 comprises an ultrafiltration system and a reverse osmosis system, wherein the ultrafiltration system and the reverse osmosis system are both connected with a same cleaning device 13, an electrodialysis system is arranged between the ultrafiltration system and the reverse osmosis system for communication, and the electrodialysis system is connected with a discharge device 12; the ultrafiltration system comprises a raw water tank 1 and a bag filter 3, a raw water pump 2 is arranged between the raw water tank 1 and the bag filter 3 for communication, the bag filter 3 is connected with an ultrafiltration membrane component 4, the ultrafiltration membrane component 4 is connected with an ultrafiltration water tank 5 and a cleaning device 13, and the ultrafiltration water tank 5 is communicated with the electrodialysis system; the electrodialysis system comprises an electrodialysis power supply, the electrodialysis power supply is connected with an electrodialysis membrane stack 7, an electrodialysis fresh water inlet pump is arranged between the electrodialysis membrane stack 7 and an ultrafiltration water tank 5 for communication, the electrodialysis membrane stack 7 is connected with an electrodialysis concentrated water tank 9 and an electrodialysis production water tank 8, the electrodialysis concentrated water tank 9 is communicated with a discharge device 12, and the electrodialysis production water tank 8 is communicated with a reverse osmosis system; the electrodialysis power supply adopts a high-frequency conducting switch power supply to provide stable and adjustable current and voltage for the electrodialysis membrane stack 7, so that salt can be directionally transferred in the membrane stack; the electrodialysis membrane stack 7 consists of electrodes, a cation exchange membrane, an anion exchange membrane and a partition plate, ions are directionally migrated under the action of a direct current electric field, and salt in the fresh water chamber is enriched in the concentrated water chamber across the ion exchange membrane, so that the aim of desalting is fulfilled; the ultrafiltration water tank 5 is connected with an acid adding system 6, and the pH value of water in the ultrafiltration water tank 5 is adjusted to 6.5-7.0 by adding acid, so that the calcification of an electrodialysis membrane in the electrodialysis process can be effectively prevented; the reverse osmosis system comprises a booster pump, a cartridge filter 10, a high-pressure pump, a reverse osmosis membrane assembly 11 and the like, wherein the booster pump sends water to the cartridge filter 10 from the electrodialysis water production tank 8, the filtered water is sent to the reverse osmosis membrane assembly 11 by the high-pressure pump, the outlet water of the cartridge filter 10 is pumped into the reverse osmosis membrane assembly 11 through the high-pressure pump, the outlet water of the reverse osmosis membrane assembly 11 is returned to be used as circulating water for supplementing to the ultrafiltration water tank 5, the whole water resource utilization rate of the system can be improved, and the concentrated water of the reverse osmosis membrane assembly 11 enters the electrodialysis concentrated water tank 9.

The utility model discloses the during operation at first passes through raw water pump 2 will blow off water in the raw water tank 1 is leading-in bag filter 3, through bag filter 3 holds back the granule that the particle diameter is greater than 50 mu m in the blowdown, bag filter 3's play water advances ultrafiltration membrane module 4, ultrafiltration membrane module 4 filters the granule of aquatic particle diameter between 0.01-0.1um, play water among ultrafiltration membrane module 4 gets into ultrafiltration water tank 5, wherein the cross-flow volume that ultrafiltration membrane module 4 ultrafiltration in-process produced flows back to raw water tank 1, is in simultaneously ultrafiltration membrane module 4 ultrafiltration in-process is regularly will water among ultrafiltration water tank 5 is introduced carry out the recoil washing among ultrafiltration membrane module 4, water after cleaning among ultrafiltration membrane module 4 pours into again raw water tank 1, then will squeeze into with the acid in the acidification system 6 with the metering pump among ultrafiltration water tank 5 will the PH of water in ultrafiltration water tank 5 is adjusted to about 6.8 On the right, the acidity of the water can reduce the calcification of the sewage in the reverse osmosis system and the electrodialysis system, then starting the electrodialysis fresh water inlet pump to guide the water in the ultrafiltration water tank 5 into the electrodialysis membrane stack 7, the electrodialysis membrane stack 7 treats the inlet water and respectively injects the inlet water into the electrodialysis concentrated water tank 9 and the electrodialysis production water tank 8, wherein water in the electrodialysis water tank 8 is pumped into the cartridge filter 10 by the booster pump, the cartridge filter 10 filters suspended impurities with the grain diameter less than 50um, prevents the reverse osmosis membrane component 11 from being blocked by dirt, the outlet water of the cartridge filter 10 is pumped into the reverse osmosis membrane assembly 11 through the high-pressure pump, part of the outlet water of the reverse osmosis membrane component 11 is used as circulating water to supplement water to the ultrafiltration water tank 5, concentrated water of the reverse osmosis membrane module 11 enters the electrodialysis concentrated water tank 9, and the concentrated water in the electrodialysis concentrated water tank 9 is pumped into the discharge equipment through a pump for treatment and discharge; wherein particles generated in the ultrafiltration membrane module 4 and the reverse osmosis membrane module 11 respectively enter the cleaning device 13 for cleaning.

The foregoing is merely exemplary and illustrative of the structure of the invention, and various modifications, additions and substitutions as described in the detailed description may be made by those skilled in the art without departing from the structure or exceeding the scope of the invention as defined in the claims.

Claims

1. The utility model provides a high-efficient water saving system of circulating water blowdown, characterized by, includes ultrafiltration system and reverse osmosis system, ultrafiltration system and reverse osmosis system all are connected with same cleaning equipment, be equipped with electrodialysis system intercommunication between ultrafiltration system and the reverse osmosis system, electrodialysis system connection has discharge apparatus.

2. The circulating water pollution discharge high-efficiency water saving system as claimed in claim 1, wherein the ultrafiltration system comprises a raw water tank and a bag filter, a raw water pump is arranged between the raw water tank and the bag filter for communication, the bag filter is connected with an ultrafiltration membrane module, the ultrafiltration membrane module is connected with an ultrafiltration water tank and a cleaning device, and the ultrafiltration water tank is connected with an electrodialysis system.

3. The circulating water pollution discharge efficient water saving system as claimed in claim 2, wherein the electrodialysis system comprises an electrodialysis power supply, the electrodialysis power supply is connected with an electrodialysis membrane stack, an electrodialysis fresh water inlet pump is arranged between the electrodialysis membrane stack and the ultrafiltration water tank for communication, the electrodialysis membrane stack is connected with an electrodialysis concentrated water tank and an electrodialysis production water tank, the electrodialysis concentrated water tank is communicated with a discharge device, and the electrodialysis production water tank is communicated with a reverse osmosis system.

4. The efficient water-saving system for sewage disposal of circulating water as claimed in claim 3, wherein the electrodialysis power supply is a high-frequency conduction switch power supply, and the electrodialysis membrane stack is composed of electrodes, cation exchange membranes, anion exchange membranes and partition plates.

5. The efficient water-saving system for circulating water pollution discharge as claimed in claim 2, wherein the ultrafiltration water tank is connected with an acid adding system, and the ultrafiltration water tank is added with acid to adjust the pH value to 6.5-7.0.

6. The circulating water pollution discharge high-efficiency water saving system as claimed in claim 3, wherein the reverse osmosis system comprises a booster pump communicated with the electrodialysis water production tank, the booster pump is connected with a cartridge filter, the cartridge filter is connected with a reverse osmosis membrane module, a high-pressure pump is arranged between the cartridge filter and the reverse osmosis membrane module for communication, and the reverse osmosis membrane module is respectively communicated with the ultrafiltration water tank and the electrodialysis concentrated water tank.