CN205796979U - A kind of ultrafilter membrane air-blowing back purge system processed for glass grinding waste water recycling - Google Patents

Abstract

The utility model discloses an ultrafiltration membrane air blowing and backwashing device used for recycling treatment of glass grinding waste water, which comprises a raw water tank connected through pipelines, a filter, an ultrafiltration component with an ultrafiltration membrane inside, and a water production tank , the ultrafiltration module is at least one, and also includes a compressed air charging device that can charge compressed air into the ultrafiltration membrane module, and the compressed air charging device passes through the compressed air pipeline and the bottom of the ultrafiltration module end connection. The utility model is provided with a compressed air charging device to fill the ultrafiltration module with compressed air, blow the surface of the ultrafiltration membrane with compressed air, and then backwash to quickly remove impurities on the ultrafiltration membrane and prolong the life of the ultrafiltration membrane. The chemical cleaning cycle improves the purification and filtration efficiency, prolongs the service life of the ultrafiltration membrane, increases the water yield of wastewater reuse, reduces wastewater discharge, saves water resources, and saves production costs. The equipment structure is simple and easy to implement, which is conducive to equipment promotion application.

Description

An ultrafiltration membrane air blowing and backwashing device for reuse treatment of glass grinding wastewater

technical field

The utility model belongs to the field of wastewater treatment, in particular to an ultrafiltration membrane air blowing and backwashing device used for recycling treatment of glass grinding wastewater.

Background technique

The pollutants in glass grinding wastewater mainly come from the glass powder produced by grinding. The particle size of this kind of suspended matter is less than or equal to 1 μm, and the sedimentation effect is poor. The traditional filtration method of quartz sand filtration and activated carbon adsorption cannot be filtered out. If it is to meet the requirements of production reuse water, it can only be treated by ultrafiltration.

Ultrafiltration is a pressurized membrane separation technology, that is, under a certain pressure, small molecular solutes and solvents pass through an ultrafiltration membrane with a certain pore size, which can effectively remove particles, colloids, bacteria, microorganisms and high-molecular organic matter in water. After the ultrafiltration membrane is used for a long time, the separator and other impurities will gradually accumulate on the surface of the ultrafiltration membrane, which will cause pollution and blockage of the ultrafiltration membrane, which will reduce the water output of the filter element equipped with the ultrafiltration membrane and effectively clean the ultrafiltration membrane. It is an important means to prolong the service life of the ultrafiltration membrane. Although the ultrafiltration technology can filter out the glass powder in the water, as the glass powder accumulates on the surface of the ultrafiltration membrane, the water production of the ultrafiltration membrane will decrease. Therefore, every certain period of operation, production needs to be stopped, and chemicals are used to soak and clean, which affects production efficiency.

In view of this, the utility model is proposed.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, and provide an ultrafiltration membrane air blowing and backwashing device for glass grinding wastewater reuse treatment. By setting a compressed air charging device, the compressed air is filled The ultrafiltration module uses compressed air to blow the surface of the ultrafiltration membrane, and then through backwashing, quickly removes impurities on the ultrafiltration membrane, prolongs the chemical cleaning cycle of the ultrafiltration membrane, and improves the purification and filtration efficiency.

In order to solve the problems of the technologies described above, the basic idea of the technical solution adopted by the utility model is:

An ultrafiltration membrane air blowing and backwashing device for reuse and treatment of glass grinding wastewater, including a raw water tank, a filter, an ultrafiltration module with an ultrafiltration membrane inside, and a produced water tank connected by pipelines. water pipeline, reverse water pipeline, drainage pipeline, the ultrafiltration assembly is at least one, the raw water tank is connected to the filter, and the filter is connected to the bottom end of the ultrafiltration assembly through the water inlet pipeline. The top of the ultrafiltration assembly is connected to the drainage pipeline and the reverse water pipeline, the reverse water pipeline is connected to the backwash inlet and the produced water tank, and the water inlet pipeline is connected to the positive wash inlet, the cleaning inlet, and the backwash discharge outlet. connected, the drainage pipeline is connected with the concentrated water discharge port, the cleaning outlet, and the positive washing discharge port, and also includes a compressed air charging device that can charge compressed air into the ultrafiltration membrane module, and the compressed air charging The device is connected to the bottom end of the ultrafiltration module through a compressed air line.

Further, the air filling volume of the compressed air filling device is no more than three times of the water production volume of the two ultrafiltration modules.

Further, the air pressure of the compressed air charging device is less than 1kgf/cm2.

Further, the ultrafiltration membrane is a polypropylene ultrafiltration membrane.

Further, a control valve and an indicating device are also included, and the control valve and the indicating device are connected in series on the pipeline.

Further, there are multiple ultrafiltration components connected in parallel.

Further, the compressed air pipeline is provided with a one-way solenoid valve and a flow indicating device for controlling the gas flow.

Further, there are multiple ultrafiltration components, which are respectively connected to the water inlet pipeline, the drainage pipeline, the reverse water pipeline, and the compressed air pipeline.

Further, the control valve includes a solenoid valve and a butterfly valve, and the indicating device includes a pressure indicating device and a flow control device.

After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art.

On the basis of not changing the original process, the utility model connects compressed air to the water inlet of each ultrafiltration membrane to control the air pressure and air volume. Every time it runs for a certain time, the surface of the ultrafiltration membrane is blown with compressed air to make the glass powder and The surface of the ultrafiltration membrane is peeled off, and then the surface of the membrane is backwashed with high-flow water, which can quickly restore the water production and greatly extend the operating cycle that requires chemical cleaning.

Compared with the traditional chemical cleaning method, the utility model can quickly restore the water production of the ultrafiltration membrane, prolong the chemical cleaning cycle, and prolong the service life of the ultrafiltration membrane.

The utility model has low investment cost and reduced operating cost. The air blowing function can be completed only by introducing compressed air, and it saves a lot of costs for chemicals and the cost of treating waste liquid from chemical cleaning. The increase in water production also reduces operating costs. .

The utility model improves the yield of wastewater reused, reduces wastewater discharge, saves water resources, and maximizes social benefits. The equipment has a simple structure and is easy to implement, which is beneficial to the popularization and application of the equipment.

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.

Description of drawings

The accompanying drawings, as a part of this application, are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute improper limitations to the utility model. Apparently, the drawings in the following description are only some embodiments, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts. In the attached picture:

Fig. 1 is the structural representation of an embodiment of the utility model;

Fig. 2 is a schematic structural view of another embodiment of the utility model.

In the figure: 1-raw water tank; 2-filter; 3-water inlet pipeline; 4-ultrafiltration membrane module; 5-drainage pipeline; 6-concentrated water discharge port; 11-positive washing inlet; 111-normal washing discharge outlet; 12-cleaning inlet; 121-cleaning outlet; 13-backwashing inlet; 131-backwashing discharge; 14-compressed air inlet; 141-compressed air pipeline.

It should be noted that these drawings and text descriptions are not intended to limit the scope of the invention in any way, but illustrate the concept of the invention for those skilled in the art by referring to specific embodiments.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used for illustration The utility model, but not used to limit the scope of the utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Embodiment one

1-raw water tank; 2-filter; 3-water inlet pipeline; 4-ultrafiltration membrane module; 5-drainage pipeline; 6-concentrated water discharge port; 7-backwater pipeline; Washing inlet; 111-positive washing outlet; 12-cleaning inlet; 121-cleaning outlet; 13-backwashing inlet; 131-backwashing outlet; 14-compressed air inlet; 141-compressed air pipeline.

As shown in Figure 1, this implementation is an ultrafiltration membrane air blowing and backwashing device for glass grinding wastewater reuse treatment, including a raw water tank 1 connected by pipelines, a filter 2, and an ultrafiltration membrane equipped with an ultrafiltration membrane inside. Filter assembly 4, produced water tank 8, water inlet pipeline 3, reverse water pipeline 7, drainage pipeline 5, the ultrafiltration assembly 4 is at least one, the raw water tank 1 is connected to the filter 2, and the filtration The device 2 is connected to the bottom end of the ultrafiltration assembly 4 through the water inlet pipeline 3, and the top of the ultrafiltration assembly 4 is connected to the drain pipeline 5 and the reverse water pipeline 7, and the reverse water pipeline 7 is connected to the backwash inlet 13 It is connected with the produced water tank 8, the water inlet pipeline 3 is connected with the washing inlet 11, the cleaning inlet 12, and the backwash discharge outlet 131, and the drain pipeline 5 is connected with the concentrated water outlet 6, the cleaning outlet 12, the washing outlet The discharge port 111 is connected, and also includes a compressed air charging device capable of charging compressed air into the ultrafiltration membrane module 4 , and the compressed air charging device is connected with the bottom end of the ultrafiltration module 4 through a compressed air pipeline 141 .

Specifically, a plurality of ultrafiltration assemblies 4 are connected in parallel, and a plurality of ultrafiltration assemblies 4 are connected in parallel to the water inlet pipeline 3, the reverse water pipeline 7, the drainage pipeline 5, and the compressed air pipeline 14, so that each ultrafiltration assembly 4 can be connected with the water inlet pipeline 3, the reverse water pipeline 7, the drainage pipeline 5, and the compressed air pipeline 14. A plurality of solenoid valves or one-way valves, flow indicator devices, and pressure indicator devices are installed in the pipeline to control the inflow and outflow of the positive washing inlet 11, the cleaning inlet 12, the backwash discharge outlet 131, and the compressed air inlet 14.

Among them, the ultrafiltration membrane needs to choose a material with better strength to make the membrane filament, such as polypropylene, etc. Polypropylene has the characteristics of high strength and tensile resistance, which is conducive to repeated washing and gas purging. The ultrafiltration in this embodiment The membrane is made of polypropylene material.

In this embodiment, the air pressure of the compressed air filling device is below 1kgf/cm2, and the air volume is not more than 3 times the ultrafiltration water production volume, so as to prevent the ultrafiltration membrane from being blown off, and the air and water should enter the ultrafiltration separately, and must not be simultaneously Enter, and whether it is air intake or water intake, the backwash discharge valve and the positive wash discharge valve must be opened.

the cleaning method:

1. In the PLC system, set the air blowing and flushing once without running for 2 hours, and set the time of each air blowing and flushing to 1 minute;

2. Open the backwash discharge valve first, then open the compressed air intake valve, and blow for 20 seconds;

3. Open the backwash inlet valve and backwash for 20 seconds. In the first 10 seconds of backwashing, it will be observed that a large amount of turbid wastewater is discharged from the backwashing outlet, and then the effluent becomes clear;

4. Open the positive washing water inlet valve and perform positive washing for 20 seconds to further rinse the surface of the ultrafiltration membrane to ensure that the water production returns to normal.

In this embodiment, an ultrafiltration treatment unit is composed of equipment between the raw water tank and the produced water tank. Preferably, in actual production, multiple treatment units can be arranged side by side between the raw water tank and the produced water tank, as shown in Figure 2 , A1 and An are both ultrafiltration processing units, and several ultrafiltration processing units are paralleled during the period from A1 to An.

In actual production, conventional process equipment is used, and the waste water reuse system needs to be chemically cleaned every 5 to 7 days of operation. After the process device of the utility model is adopted, chemical cleaning is performed once every 30 days, which greatly prolongs the cleaning cycle.

On the basis of not changing the original process, the utility model connects compressed air to the water inlet of each ultrafiltration membrane to control the air pressure and air volume. Every time it runs for a certain time, the surface of the ultrafiltration membrane is blown with compressed air to make the glass powder and The surface of the ultrafiltration membrane is peeled off, and then the surface of the membrane is backwashed with high-flow water, which can quickly restore the water production and greatly extend the operating cycle that requires chemical cleaning.

Compared with the traditional chemical cleaning method, the utility model can quickly restore the water production of the ultrafiltration membrane, prolong the chemical cleaning cycle, and prolong the service life of the ultrafiltration membrane.

The utility model has low investment cost and reduced operating cost. The air blowing function can be completed only by introducing compressed air, and it saves a lot of costs for chemicals and the cost of treating waste liquid from chemical cleaning. The increase in water production also reduces operating costs. .

The utility model improves the yield of wastewater reused, reduces wastewater discharge, saves water resources, and maximizes social benefits. The equipment has a simple structure and is easy to implement, which is beneficial to the popularization and application of the equipment.

The above descriptions are only preferred embodiments of the present utility model, and do not limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not intended to limit the utility model. Without departing from the scope of the technical solution of the utility model, the technicians of this patent may use the technical content of the above prompts to make some changes or modify them into equivalent embodiments with equivalent changes, but all do not depart from the content of the technical solution of the utility model Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model still belong to the scope of the solution of the utility model.

Claims (9)

1. the ultrafilter membrane air-blowing back purge system processed for glass grinding waste water recycling, former including connected by pipeline Water tank, filter, inside are provided with the ultrafiltration module of ultrafilter membrane, produce water tank, and pipeline includes inlet pipeline, pipeline of turning one's coat, drain pipe Road, described ultrafiltration module is at least one, and described raw water box is connected with filter, and described filter passes through inlet pipeline Being connected with the bottom of ultrafiltration module, the top of described ultrafiltration module is connected with discharge pipe line, pipeline of turning one's coat, described pipe of turning one's coat Road and backwash import and produce water tank and is connected, described inlet pipeline with just wash import, cleaning import, backwash floss hole are connected, institute The discharge pipe line stated and concentrated water discharge mouth, washing outlet, just wash floss hole and be connected, it is characterised in that also including can be to ultrafilter membrane Assembly is filled with compressed-air actuated compressed air charging device, described compressed air charging device by compressed air line with The bottom of ultrafiltration module connects.

A kind of ultrafilter membrane air-blowing back purge system processed for glass grinding waste water recycling the most according to claim 1, It is characterized in that, the air charge of described compressed air charging device is less than three times of two ultrafiltration module aquifer yields.

A kind of ultrafilter membrane air-blowing back purge system processed for glass grinding waste water recycling the most according to claim 1, It is characterized in that, the air pressure of described compressed air charging device is less than 1kgf/cm²。

A kind of ultrafilter membrane air-blowing back purge system processed for glass grinding waste water recycling the most according to claim 1, It is characterized in that, described ultrafilter membrane is polypropylene ultrafilter membrane.

A kind of ultrafilter membrane air-blowing back purge system processed for glass grinding waste water recycling the most according to claim 1, It is characterized in that, also include control valve, instruction device, and control valve, instruction device are connected on pipeline.

A kind of ultrafilter membrane air-blowing back purge system processed for glass grinding waste water recycling the most according to claim 1, It is characterized in that, described ultrafiltration module is multiple and is connected in parallel.

A kind of ultrafilter membrane air-blowing backwash dress processed for glass grinding waste water recycling Put, it is characterised in that described compressed air line is provided with Unidirectional solenoid valve and the indicator for flow rate controlling gas flow.

A kind of ultrafilter membrane air-blowing back purge system processed for glass grinding waste water recycling the most according to claim 1, It is characterized in that, described ultrafiltration module is multiple, and respectively with inlet pipeline, discharge pipe line, pipeline of turning one's coat, compressed air hose Road connects.

A kind of ultrafilter membrane air-blowing back purge system processed for glass grinding waste water recycling the most according to claim 5, It is characterized in that, described control valve includes that electromagnetic valve, butterfly valve, described instruction device include pressure-indication means, flow control Device processed.