Glass grinding fluid self-cleaning, pollution-discharging and filtering device

Abstract

The utility model relates to a glass grinding fluid self-cleaning pollution discharge filtering device which comprises a grinding fluid conveying pipe, a primary filtrate conveying pipe, a waste liquid conveying pipe, a backwashing pipe, a primary filtering container, a fine filtering container, a pressure difference controller and a controller. According to the self-cleaning, pollution-discharging and filtering device for the glass grinding fluid, the primary filtering module is firstly arranged along the conveying direction of the to-be-treated grinding fluid, so that a larger impurity part in the grinding fluid is directly intercepted and discharged from the bottom, and the grinding fluid which is not intercepted and passes through the primary filtering module enters the fine filtering module of the next working procedure; and fine impurities can be further filtered through the fine filtration module, the effect of purifying the grinding liquid is good, and a powerful guarantee is provided for continuous and stable operation of grinding operation. A multi-stage structure is adopted for both primary filtration and fine filtration, so that the treatment capacity of grinding liquid is large, and the purification effect is also ensured; full-automatic self-cleaning type filtering is achieved, back-washing pollution discharge can be conducted according to requirements, and feeding of to-be-treated grinding liquid can be uninterruptedly conducted during cleaning pollution discharge.

Description

Technical Field

[0001] The utility model relates to the field of water filtering equipment, in particular to a self-cleaning sewage filtering device for glass grinding liquid. Background Art

[0002] Rare earth polishing liquid and other materials will continuously produce some impurities during the grinding process, such as hair falling off the brush, condensation of grinding powder, etc. If such impurities are not separated in time, it will affect the processing quality of the workpiece grinding surface and produce some adverse consequences. At present, ordinary mesh filters are widely used in water source filtration, industrial water filtration systems and other fields, but their disadvantages are small dirt holding capacity, easy to be blocked by dirt, complicated cleaning work, and some equipment must be disassembled to achieve cleaning of the filter part. The status of the filter cannot be monitored and it is greatly affected by human factors, which makes the automation level of the whole system very low.

[0003] In order to effectively improve product efficiency and yield, the grinding fluid must be filtered online and the physical and chemical indicators of the polishing fluid must be adjusted in time to ensure the stable and high-quality operation of the grinding process. For the above scenarios, self-cleaning automatic filtration is an indispensable treatment method in the grinding fluid purification process. It is very necessary to develop a set of highly compatible online automatic filtration devices for grinding fluid to separate impurities in the grinding fluid, purify the grinding fluid or protect the normal operation of other equipment in the system, and provide a strong guarantee for the continuous and stable operation of the grinding operation. Summary of the invention

[0004] Based on the above existing technical problems, the utility model provides a self-cleaning sewage filtering device for glass grinding liquid.

[0005] To achieve the above object, the utility model provides a glass grinding liquid self-cleaning sewage filtering device, which comprises:

[0006] A grinding liquid delivery pipe, used for delivering the grinding liquid to be processed;

[0007] A primary filtrate delivery pipe, used for delivering the grinding liquid after the primary filtration treatment;

[0008] Waste liquid conveying pipe, used to output waste water discharged after primary filtration and fine filtration;

[0009] A backwash pipe, used for conveying backwash liquid, wherein the backwash pipe is connected to a backwash module for starting and pumping the backwash liquid;

[0010] A primary filter container, the internal space of which is divided into at least two left-right distributed and independent liquid storage spaces by a primary filter module, one of any two adjacent liquid storage spaces is a dense phase space, and the other is a dilute phase space; the output end of the grinding liquid delivery pipe is arranged at the top of the primary filter container and is connected with liquid outlets corresponding to the dense phase spaces one by one; the bottom of the dense phase space is connected to the waste liquid delivery pipe, and the bottom of the dilute phase space is connected to the primary filtrate delivery pipe;

[0011] A fine filtration container, the internal space of which is divided into at least two vertically distributed and independent filtration spaces by a fine filtration module, a liquid inlet valve and a liquid discharge valve are provided at the bottom of the fine filtration container, the liquid inlet valve is connected to the primary filtrate delivery pipe, the liquid discharge valve is connected to the waste liquid delivery pipe, and a liquid outlet valve is provided at the top of the fine filtration container; each of the filtration spaces is provided with a liquid inlet connected to the output end of the backwash pipe;

[0012] A pressure difference controller, arranged on the fine filtration container to detect the pressure difference inside the fine filtration container; and

[0013] A controller is electrically connected to the backwash module and the pressure difference controller.

[0014] As a further preferred technical solution of the present invention, the filter units of the primary filter module and the fine filter module are filter screens, filter plates or filter cotton, and the pore size of the filter unit of the primary filter module is larger than the pore size of the filter unit of the fine filter module.

[0015] As a further preferred technical solution of the present utility model, the backwash module includes a backwash liquid supply pump, and the backwash liquid supply pump is controlled by the controller.

[0016] As a further preferred technical solution of the present utility model, the grinding liquid delivery pipe is connected to a grinding liquid supply pump, and the grinding liquid supply pump is controlled by the controller.

[0017] As a further preferred technical solution of the present utility model, the controller is provided with a filtration time timer and a sewage discharge time timer.

[0018] As a further preferred technical solution of the utility model, the liquid inlet valve, liquid discharge valve and liquid outlet valve are electromagnetic valves or electric valves, and the liquid inlet valve, liquid discharge valve and liquid outlet valve are all electrically connected to the controller.

[0019] As a further preferred technical solution of the present invention, the controller is a single chip microcomputer or a PLC.

[0020] As a further preferred technical solution of the utility model, the filtering device also includes a grinding specific gravity regulator, the input end of the grinding liquid specific gravity regulator is connected to the liquid outlet valve, and the output end of the grinding liquid specific gravity regulator is a grinding liquid outlet.

[0021] As a further preferred technical solution of the present utility model, the grinding specific gravity regulator includes a specific gravity controller and a weighing and metering module, and the specific gravity controller and the weighing and metering module are both electrically connected to the controller.

[0022] The glass grinding liquid self-cleaning sewage discharge and filtering device of the utility model adopts the above technical scheme, which can achieve the following beneficial effects:

[0023] 1) The utility model first arranges a primary filter module along the conveying direction of the grinding liquid to be processed, so that the larger impurities in the grinding liquid are directly intercepted and discharged from the bottom, and the grinding liquid that passes through the primary filter module without being intercepted enters the fine filter module of the next process, and the fine impurities can be further filtered through the fine filter module, so that the grinding liquid is purified effectively, providing a strong guarantee for the continuous and stable operation of the grinding operation;

[0024] 2) The primary filtration and fine filtration of the utility model both adopt a multi-stage structure, which not only has a large processing capacity of the grinding liquid, but also ensures the purification effect;

[0025] 3) The utility model has the function of self-cleaning sewage discharge and filtration, thereby realizing fully automatic self-cleaning filtration, and can perform backwashing and sewage discharge according to needs, and the supply of the grinding liquid to be treated can be uninterrupted during cleaning and sewage discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Figure 1 The present invention is a structural schematic diagram of an embodiment of the self-cleaning and sewage filtering device for glass grinding liquid provided by the utility model.

[0028] In the figure: 1. grinding liquid delivery pipe, 2. primary filtrate delivery pipe, 3. waste liquid delivery pipe, 4. primary filtration container, 5. primary filtration module, 6. dense phase space, 7. dilute phase space, 8. liquid inlet valve, 9. liquid discharge valve, 10. fine filtration container, 11. liquid outlet valve, 12. fine filtration module, 13. differential pressure controller, 14. backwash pipe, 15. grinding liquid specific gravity regulator.

[0029] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. The terms such as "upper", "lower", "left", "right", "middle" and "one" used in the preferred embodiments are only used to facilitate the description, and are not used to limit the scope of the implementation of the present invention. The changes or adjustments in their relative relationships shall also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0031] like Figure 1 As shown, the utility model provides a self-cleaning sewage filtering device for glass grinding liquid, comprising:

[0032] A grinding liquid delivery pipe 1 is used to deliver the grinding liquid to be processed, and a grinding liquid supply pump is connected to the grinding liquid delivery pipe 1;

[0033] The primary filtrate delivery pipe 2 is used to deliver the grinding liquid after the primary filtration treatment;

[0034] The waste liquid delivery pipe 3 is used to output the waste water discharged after the primary filtration and the fine filtration;

[0035] A backwash pipe 14, used for conveying backwash liquid, the backwash pipe 14 is connected to a backwash module for starting and pumping the backwash liquid, the backwash module includes a backwash liquid supply pump;

[0036] A primary filter container 4, whose internal space is divided into six left-right distributed and independent liquid storage spaces by five primary filter modules 5, one of any two adjacent liquid storage spaces is a dense phase space 6, and the other is a dilute phase space 7; the output end of the grinding liquid delivery pipe 1 is arranged at the top of the primary filter container 4 and is connected with a liquid outlet corresponding to the dense phase space 6 one by one, and the grinding liquid to be treated delivered by the grinding liquid delivery pipe 1 is poured into the dense phase space 6 through the liquid outlet; the bottom of the dense phase space 6 is connected to the waste liquid delivery pipe 3, and the bottom of the dilute phase space 7 is connected to the primary filtrate delivery pipe 2;

[0037] A fine filter container 10, whose internal space is divided into five vertically distributed and independent filter spaces by four fine filter modules 12, an inlet valve 8 and a drain valve 9 are provided at the bottom of the fine filter container 10, the inlet valve 8 is connected to the primary filtrate delivery pipe 2, the drain valve 9 is connected to the waste liquid delivery pipe 3, and a liquid outlet valve 11 is provided at the top of the fine filter container 10; each of the filter spaces is provided with a liquid inlet connected to the output end of the backwash pipe 14, so that each filter space and the fine filter module 12 can be flushed during backwashing;

[0038] A pressure difference controller 13 is provided on the fine filter container 10 to detect the pressure difference inside the fine filter container 10, and the slag accumulation in the fine filter container 10 and on the fine filter module 12 is determined by the detected pressure difference value; and

[0039] The controller is used to be electrically connected to the backwash module, the differential pressure controller 13, the backwash liquid supply pump and the grinding liquid supply pump. The controller is a single chip microcomputer or a PLC, which has a simple structure and is easy to program to realize filtering and backwashing control. Of course, the controller can also be other types, which are not limited here.

[0040] Specifically, the filter units of the primary filter module 5 and the fine filter module 12 are filter screens, filter plates or filter cotton, and the pore size of the filter unit of the primary filter module 5 is larger than the pore size of the filter unit of the fine filter module 12. Of course, in practical applications, other types of filter units or filter units with composite structures can also be selected according to needs, which are not limited here.

[0041] The working principle of the self-cleaning and sewage filtering device for glass grinding liquid in this embodiment is as follows:

[0042] 1. Grinding liquid filtration

[0043] When the filtering function is started, the grinding liquid to be treated is transported through the grinding liquid delivery pipe 1, and the grinding liquid delivery pipe 1 outputs the grinding liquid to be treated to each dense phase space 6 through the liquid outlet. The grinding liquid in the dense phase space 6 is filtered by the primary filtering module 5 and enters the dilute phase space 7 to filter relatively large impurities. The slag-containing solution in the dense phase space 6 flows out from its bottom to the waste liquid delivery pipe 3, and the grinding liquid obtained by filtering the dilute phase space 7 flows out from its bottom to the primary filtrate delivery pipe 2, thereby completing the primary filtration;

[0044] The drain valve 9 of the fine filtration container 10 is closed and the inlet valve 8 is opened. The grinding liquid in the primary filtrate delivery pipe 2 flows into the fine filtration container 10 through the inlet valve 8. As the liquid level in the fine filtration container 10 gradually rises, the grinding liquid is further filtered by the fine filtration module 12 to filter out relatively small impurities, thereby achieving fine filtration, and finally the grinding liquid is output from the outlet valve 11 at the top of the fine filtration container 10.

[0045] 2. Backwash

[0046] When the fine filter module 12 works for a period of time, corresponding blockage will occur, and corresponding backwashing and deslagging are required to achieve continuous filtering. The blockage degree of the fine filter module 12 can be reflected in real time through the pressure difference detected by the pressure difference controller 13. The controller compares the pressure difference detected by the pressure difference controller 13 with the pressure difference set by the user. When the detected pressure difference reaches the set pressure difference, backwashing is started.

[0047] Automatic backwashing and drainage: First, open the drain valve 9 of the fine filter container 10 and close the inlet valve 8; then, start the flushing liquid supply pump to transport the backwashing liquid to each filter space of the fine filter container 10 through the backwashing pipe 14, and the cleaned sewage is output through the drain valve 9; when the drainage time is up, end the backwashing.

[0048] Preferably, the controller is provided with a filtering time timer and a sewage discharge time timer. The filtering time is set on the filtering time timer. When the filtering time is reached, the above-mentioned backwashing automatic sewage discharge function is started, and the sewage discharge time is set by the sewage discharge time timer; at the same time, the control system compares the detected pressure difference with the pressure difference set by the user in real time. When the detected pressure difference reaches the set pressure difference, the filter is also cleaned and discharged, and the sewage discharge time is set by the sewage discharge time timer. When the sewage discharge time is reached, the cleaning stops, and the system automatically returns to the initial state to prepare for the next filtering process.

[0049] In order to realize automatic control, preferably, the liquid inlet valve 8, the liquid discharge valve 9, and the liquid outlet valve 11 are electromagnetic valves or electric valves, and the opening / closing of the liquid inlet valve 8, the liquid discharge valve 9, and the liquid outlet valve 11 are all controlled by a controller.

[0050] In a specific embodiment, the glass grinding liquid self-cleaning and sewage filtering device also includes a grinding liquid specific gravity regulator 15, the input end of the grinding liquid specific gravity regulator 15 is connected to the liquid outlet valve 11, and the output end of the grinding liquid specific gravity regulator 15 is a grinding liquid output port. The grinding liquid specific gravity regulator 15 uses liquid media of different specific gravities to accurately proportion and adjust to the required specific gravity, and monitors to achieve material addition to ensure that the treated grinding liquid can be directly put into use again. For this purpose, the grinding liquid specific gravity regulator 15 is also provided with a specific gravity controller and a weighing and metering module, and the specific gravity controller and the weighing and metering module are both electrically connected to the controller.

[0051] Although specific embodiments of the present invention are described above, those skilled in the art should understand that these are merely examples and that various changes or modifications may be made to the embodiments without departing from the principles and essence of the present invention. The scope of protection of the present invention is limited only by the appended claims.

Claims

1. A self-cleaning sewage filter device for glass grinding liquid, characterized in that: include: A grinding liquid delivery pipe, used for delivering the grinding liquid to be processed; A primary filtrate delivery pipe, used for delivering the grinding liquid after the primary filtration treatment; Waste liquid conveying pipe, used to output waste water discharged after primary filtration and fine filtration; A backwash pipe, used for conveying backwash liquid, wherein the backwash pipe is connected to a backwash module for starting and pumping the backwash liquid; A primary filter container, the internal space of which is divided into at least two left-right distributed and independent liquid storage spaces by a primary filter module, one of any two adjacent liquid storage spaces is a dense phase space, and the other is a dilute phase space; the output end of the grinding liquid delivery pipe is arranged at the top of the primary filter container and is connected with liquid outlets corresponding to the dense phase spaces one by one; the bottom of the dense phase space is connected to the waste liquid delivery pipe, and the bottom of the dilute phase space is connected to the primary filtrate delivery pipe; A fine filtration container, the internal space of which is divided into at least two vertically distributed and independent filtration spaces by a fine filtration module, a liquid inlet valve and a liquid discharge valve are provided at the bottom of the fine filtration container, the liquid inlet valve is connected to the primary filtrate delivery pipe, the liquid discharge valve is connected to the waste liquid delivery pipe, and a liquid outlet valve is provided at the top of the fine filtration container; each of the filtration spaces is provided with a liquid inlet connected to the output end of the backwash pipe; A pressure difference controller, arranged on the fine filtration container to detect the pressure difference inside the fine filtration container; and A controller is electrically connected to the backwash module and the pressure difference controller.

2. The self-cleaning sewage filter device for glass grinding liquid according to claim 1, characterized in that: The filter units of the primary filter module and the fine filter module are filter screens, filter plates or filter cotton, and the pore size of the filter unit of the primary filter module is larger than the pore size of the filter unit of the fine filter module.

3. The self-cleaning sewage filter device for glass grinding liquid according to claim 1, characterized in that: The backwash module includes a backwash liquid supply pump, and the backwash liquid supply pump is controlled by the controller.

4. The self-cleaning sewage filter device for glass grinding liquid according to claim 1, characterized in that: The grinding liquid delivery pipe is connected with a grinding liquid supply pump, and the grinding liquid supply pump is controlled by the controller.

5. The self-cleaning sewage filter device for glass grinding liquid according to claim 1, characterized in that: The controller is provided with a filtering time timer and a sewage discharge time timer.

6. The self-cleaning sewage filter device for glass grinding liquid according to claim 1, characterized in that: The liquid inlet valve, liquid discharge valve and liquid outlet valve are electromagnetic valves or electric valves, and the liquid inlet valve, liquid discharge valve and liquid outlet valve are all electrically connected to the controller.

7. The self-cleaning sewage filter device for glass grinding liquid according to claim 1, characterized in that: The controller is a single chip microcomputer or a PLC.

8. The self-cleaning sewage filter device for glass grinding liquid according to any one of claims 1 to 7, characterized in that: It also includes a grinding liquid specific gravity regulator, the input end of the grinding liquid specific gravity regulator is connected to the liquid outlet valve, and the output end of the grinding liquid specific gravity regulator is a grinding liquid output port.

9. The self-cleaning sewage filter device for glass grinding liquid according to claim 8, characterized in that: The grinding liquid specific gravity regulator comprises a specific gravity controller and a weighing and metering module, and both the specific gravity controller and the weighing and metering module are electrically connected to the controller.

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