CN111346409A - Pressure filter of atmospheric pressure feeding and blowback filter cake - Google Patents
Pressure filter of atmospheric pressure feeding and blowback filter cake Download PDFInfo
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- CN111346409A CN111346409A CN202010252663.8A CN202010252663A CN111346409A CN 111346409 A CN111346409 A CN 111346409A CN 202010252663 A CN202010252663 A CN 202010252663A CN 111346409 A CN111346409 A CN 111346409A
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- feeding
- pipeline
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/30—Feeding devices ; Discharge devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/32—Removal of the filter cakes
- B01D25/325—Removal of the filter cakes counter-current flushing, e.g. by air bumps
- B01D25/327—Removal of the filter cakes counter-current flushing, e.g. by air bumps with backwash shoes, with nozzles
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
A filter press for air pressure feeding and back flushing filter cakes is a complete set of filter device and comprises a feeding pump, an air pressure feeding tank, an air compressor, feeding control valves (V01, V02 and V03), air inlet control valves (V04 and V05), a one-way valve, a safety valve, a pressure gauge, a liquid level meter, a pressure sensor and a slurry control valve, wherein the air pressure feeding tank is provided with a feeding port and a discharging port, the feeding pipeline is connected with the feeding port of the air pressure feeding tank and passes through a pipeline to be connected with a feeding pipeline, the discharging pipeline is connected with a filter chamber of the filter press, the upper surface of the discharging pipeline is provided with the pressure sensor, the air inlet pipeline is connected with the, the filtering system is completely automatically controlled by the PLC, high-pressure feeding materials quickly form a filter cake in the filtering chamber, filtrate is quickly discharged, the purity of the filter cake is improved, the air pressure feeding speed is increased by three times compared with the original cycle, the production cost is reduced, and therefore the economic benefit is improved.
Description
Technical Field
The invention belongs to the field of filter presses of filtering equipment in the solid-liquid separation industry, relates to a pressure filter with air pressure feeding, and further relates to a pressure filter with air pressure feeding and back flushing of filter cakes.
Background
The filter press is a main filtering device in the solid-liquid separation industry, materials enter a filtering chamber through the pressure of a feeding pump, particles in the materials are intercepted through filter cloth arranged in the filtering chamber to form a filter cake in the filtering chamber, filtrate is discharged from liquid outlet holes at four corners of a filter plate, the filter plate is pulled open to remove the filter cake, and one filtering cycle is completed to realize the purpose of solid-liquid separation.
Due to the development of economy, the types of filtered materials are increased day by day, the traditional filtering system used by the existing filter press cannot meet the market demand, some materials have the following defects in the filtering process, the filter cloth of the filter plate is often damaged due to unstable feeding pressure, the material filtering speed is low, the separation effect is poor, the feeding time is long, the production cost is high, and therefore the economic benefit is influenced.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provide the filter press with the pneumatic feeding and the back flushing of filter cakes.
In order to achieve the purpose, the invention provides a filter press with pneumatic feeding and back flushing of filter cakes, which is a complete set of filter device and comprises a feeding pump, a pneumatic feeding tank, an air compressor, feeding control valves (V01, V02, V03), feeding control valves (V04, V05), a one-way valve, a safety valve, a pressure gauge, a liquid level meter, a pressure sensor and a slurry control valve, wherein the feeding pump is connected with the feeding pipe, the one-way valve is arranged on the feeding pipe, the feeding control valve V01 is arranged on the feeding pipe, the pneumatic feeding tank is provided with a feeding port and a discharging port, the feeding pipe is connected with the feeding port of the pneumatic feeding tank and is provided with a discharging pipe, the discharging pipe is arranged on the discharging port of the pneumatic feeding tank, the discharging pipe is connected with a filter chamber of the filter press, the feeding control valve V02 is arranged on the discharging pipe, and the pressure sensor is arranged on the discharging, the filter press is provided with a through pipeline, one end of the through pipeline is connected with a feeding pipeline, the other end of the through pipeline is connected with a discharging pipeline, a feeding control valve V03 is installed on the through pipeline, a safety valve, a pressure gauge and a liquid level meter are installed at the upper end of a pressure feeding tank, a discharging pipe is arranged at the bottom of the lower end of the pressure feeding tank and provided with an air inlet pipeline, one end of the air inlet pipeline is connected with an air compressor, the other end of the air inlet pipeline is connected with the pressure feeding tank, an air inlet control valve V04 is installed on the air inlet pipeline, a back flushing pipeline is arranged, one end of the back flushing pipeline is connected with the pressure feeding tank, the other end of the back flushing pipeline is connected with the front end of a filter chamber of the filter press.
The bottom of the lower end of the air pressure feeding tank is provided with a drainage pipe, and the drainage pipe at the lower end of the air pressure feeding tank is provided with a drainage control valve.
The discharge pipeline is connected with the filter chamber of the filter press, the discharge pipeline is provided with a backflow pipeline, the backflow pipeline is provided with a slurry control valve, and the backflow pipeline is connected with the material pool.
The filter press implementing the pneumatic feeding and back-blowing filter cake realizes the effect of high material separation speed, the operation of the filter press complete equipment is automatically controlled by a PLC controller, the material filtration is divided into three stages, the first stage is the material storage of a pneumatic feeding tank, a feeding pump starts to start the filtered material to enter a cavity of the pneumatic feeding tank 3, a feeding control valve (V01) is automatically closed when a liquid level meter reaches a set upper limit, an air compressor is automatically inflated to reach the pressure upper limit, the material storage of the pneumatic feeding tank is finished, the second stage is high-pressure filtration, the feeding pump directly pushes the material into a filter chamber of the filter press through a pipeline to be filtered, when the pressure reaches the set upper limit, a pressure sensor transmits a signal to be automatically converted into the high-pressure feeding filtration of the pneumatic feeding tank, the feeding control valve (V01) (V02) is automatically opened, and the feeding pump automatically pushes the material to the pneumatic feeding, the air pressure feeding tank automatically pushes the material to the filtering chamber under high pressure, the feeding pressure can select filtering pressure of 0.8-2.0 MPa, the feeding is automatically stopped when the filtering pressure reaches the set upper limit, the pressure maintaining time is set to be generally 3-10 minutes to discharge the water in the filter cake, the third stage is that the filter cake is back blown by high-pressure airflow, the pressure of 1.0-2.0 MPa can be selected according to the material property, the air flow enters the middle feeding hole of the filtering chamber through a back blowing pipeline, the back blowing time is generally set to be 1-3 minutes, the slurry in the middle hole of the filtering chamber is back blown to the material pool through a high-pressure airflow backflow pipeline, the airflow entering the filter cake blows residual filtrate through the liquid outlet holes at the four corners of the filtering chamber, the blown filtrate is discharged to the filtrate pool through a dark flow pipeline, the water content of the filter cake is greatly reduced, the complete set of the filter press is automatically controlled by the PLC controller, the filter plate and the filter cloth can not be damaged, the service life of the equipment is long, the high-pressure feeding materials quickly form a filter cake in the filter chamber, filtrate is quickly discharged, the water content of the filter cake is further reduced by high-pressure back flushing, the purity of the filter cake is improved, the recovery rate of the filtrate is increased, the filtering speed is increased by three times compared with the original cycle by air pressure feeding, the production cost is reduced, and therefore the economic benefit is improved.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic view of a filter press with pneumatic feed and blowback of filter cake according to the present invention.
In the figure, 1 is a feed pump, 2 is a feed control valve (V01), 3 is a pneumatic feed tank, 4 is an air compressor, 5 is an air inlet control valve (V04), 6 is a safety valve, 7 is a pressure gauge, 8 is a feed control valve (V02), 9 is a pressure sensor, 10 is a filter press, 11 is a blind flow pipeline, 12 is an air inlet control valve (V05), 13 is a back flushing pipeline, 14 is a drainage control valve, 15 is a feed control valve (V03), 16 is a one-way valve, 17 is a liquid level meter, 18 is a return pipeline, 19 is a material pool, 20 is a cross pipeline, 21 is a slurry control valve, and 22 is a filtrate pool.
Detailed Description
Referring to fig. 1, the present invention provides a filter press with pneumatic feeding and back-blowing filter cake, the complete set of filter press is automatically controlled by electricity, and automatically operated by using a PLC controller, the feeding pressure is set according to the material property, and the complete set of filter press is implemented as follows.
In the first stage, the air pressure feeding tank 3 stores materials, the electrical control PLC controller automatically opens the feeding control valve (V01) 2, closes the feeding control valve (V02) 8, closes the feeding control valve (V03) 15, the feeding pump 1 starts to start the filtered materials to enter the cavity of the air pressure feeding tank 3, the air pressure feeding tank 3 must meet the relevant regulations in the national standard of a pressure container to ensure that the safety requirements of the set feeding pressure of the filter press are met, when the materials enter the air pressure feeding tank 3 and reach the set upper limit, the feeding control valve (V01) is automatically closed according to the display of the liquid level meter 17, the air compressor 4 starts to work, the feeding control valve (V04) 5 is opened, the feeding control valve (V05) 12 is closed, the air pressure in the air pressure feeding tank 3 automatically stops when the set upper limit is reached, the safety valve 6 exceeding the pressure setting is automatically discharged, the pressure in the air pressure feeding tank 3 is kept stable, and the material storage of the air pressure feeding tank 3 is completed.
When the second stage of material filtration starts, the electric control PLC controller automatically closes the feeding control valve (V01) 2, closes the feeding control valve (V02) 8, closes the slurry control valve 21, opens the feeding control valve (V03) 15, the feeding pump 1 directly injects the material into the chamber of the filter press 10, when the filtering chamber of the filter press 10 reaches the set upper limit pressure, the PLC controller automatically switches by sending a signal through the pressure sensor 9, the feeding control valve (V03) 15 is immediately closed, the feeding control valve (V01) 2 is opened, the feeding control valve (V02) 8 is opened, the feeding pressure can be selected from the filtering pressure of 0.8-2.0 MPa, when the filtering pressure reaches the set upper limit, the feeding is automatically stopped, the material in the air pressure feeding tank 3 enters the filtering chamber of the filter press 10 under high pressure, the filtrate is discharged from the blind flow pipeline 11 at four corners of the filter press, the filtrate is discharged to the filtrate pool 22, and when the pressure of the filtering chamber reaches the upper limit, the pressure sensor 9 sends a signal to the PLC controller to instruct the feeding pump 1 to stop automatic feeding, the pressure maintaining set time is required for discharging the filtrate in the filter chamber, the filtrate is generally set for 3-10 minutes to be discharged according to the quality condition of the material, other control valves are automatically and completely closed, and the material filtering is finished.
The third stage is that high-pressure airflow blowbacks the filter cake, the purpose of blowback the filter cake is to further reduce the water content in the filter cake, blow back the slurry that has not been filtered in the central feed port of the filter chamber to the material pool, the electrical control PLC controller automatically opens the air inlet control valve (V05), open the slurry control valve 21, the air compressor 4 automatically starts to keep the stability of the air pressure, set the blowback time according to the material property, set the air flow to select the pressure of 1.0-2.0 MPa, enter the middle feed port of the filter chamber through the blowback pipeline 13, the blowback time is generally set to 1-3 minutes, the slurry blown out from the central port of the filter chamber returns to the material pool 19 through the backflow pipeline 18, the filtrate blown out from the filter cake is discharged to the filtrate pool 22 through the blind pipeline 11, the feed pump starts to store the material in the air pressure feed tank 3 during the blowback period, and the air, ready for the next cycle of filtration.
The filter press completes the high-pressure filtration and back flushing of the materials in the three stages, an electrically-installed PLC automatically operates to pull open the filter plates to remove filter cakes according to a cake discharge device arranged on the filter press, then the filter plates are pressed tightly to start feeding, and a filtration cycle is completed.
Claims (3)
1. A filter press for air pressure feeding and back flushing of filter cakes is characterized by being a complete set of filter device and comprising a feeding pump, an air pressure feeding tank, an air compressor, feeding control valves (V01, V02 and V03), air feeding control valves (V04 and V05), a one-way valve, a safety valve, a pressure gauge, a liquid level meter, a pressure sensor and a slurry control valve, wherein the feeding pump is connected with the feeding pipeline, the one-way valve is arranged on the feeding pipeline, the feeding control valve V01 is arranged on the feeding pipeline, the air pressure feeding tank is provided with a feeding port and a discharging port, the feeding pipeline is connected with the feeding port of the air pressure feeding tank and is provided with a discharging pipeline, the discharging pipeline is arranged on the discharging port of the air pressure feeding tank, the discharging pipeline is connected with a filter chamber of the filter press, the feeding control valve V02 is arranged on the discharging pipeline, the pressure sensor is arranged on the discharging pipeline, the filter press is provided with a through pipeline, one end of the through pipeline is connected with a feeding pipeline, the other end of the through pipeline is connected with a discharging pipeline, a feeding control valve V03 is installed on the through pipeline, a safety valve, a pressure gauge and a liquid level meter are installed at the upper end of a pressure feeding tank, a discharging pipe is arranged at the bottom of the lower end of the pressure feeding tank and provided with an air inlet pipeline, one end of the air inlet pipeline is connected with an air compressor, the other end of the air inlet pipeline is connected with the pressure feeding tank, an air inlet control valve V04 is installed on the air inlet pipeline, a back flushing pipeline is arranged, one end of the back flushing pipeline is connected with the pressure feeding tank, the other end of the back flushing pipeline is connected with the front end of a filter chamber of the filter press.
2. The filter press for pneumatic feeding and blowback of filter cake as claimed in claim 1, wherein the drain pipe at the lower end of the pneumatic feeding tank is provided with a drain control valve.
3. The filter press with pneumatic feeding and back blowing of filter cakes according to claim 1, wherein a return pipeline is installed on a discharge pipeline, a slurry control valve is installed on the return pipeline, and the return pipeline is connected with a material pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010252663.8A CN111346409A (en) | 2020-04-02 | 2020-04-02 | Pressure filter of atmospheric pressure feeding and blowback filter cake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010252663.8A CN111346409A (en) | 2020-04-02 | 2020-04-02 | Pressure filter of atmospheric pressure feeding and blowback filter cake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111346409A true CN111346409A (en) | 2020-06-30 |
Family
ID=71189353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010252663.8A Pending CN111346409A (en) | 2020-04-02 | 2020-04-02 | Pressure filter of atmospheric pressure feeding and blowback filter cake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111346409A (en) |
-
2020
- 2020-04-02 CN CN202010252663.8A patent/CN111346409A/en active Pending
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Address after: 253034 Jingjin environmental protection, Jinghua Road, Dezhou Economic Development Zone, Shandong Province Applicant after: Jingjin Equipment Co.,Ltd. Address before: 253034 Jingjin environmental protection, Jinghua Road, Dezhou Economic Development Zone, Shandong Province Applicant before: Jing Jin Environmental Protection Inc. |
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