CN113856264B - Pressure filter - Google Patents
Pressure filter Download PDFInfo
- Publication number
- CN113856264B CN113856264B CN202110732601.1A CN202110732601A CN113856264B CN 113856264 B CN113856264 B CN 113856264B CN 202110732601 A CN202110732601 A CN 202110732601A CN 113856264 B CN113856264 B CN 113856264B
- Authority
- CN
- China
- Prior art keywords
- filter
- plate
- squeeze
- plates
- inclinometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000006835 compression Effects 0.000 claims description 35
- 238000007906 compression Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 description 8
- 230000003213 activating effect Effects 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/127—Filter presses, i.e. of the plate or plate and frame type with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands
- B01D25/1275—Filter presses, i.e. of the plate or plate and frame type with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands the plates or the frames being placed in a non-vertical position
-
- 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
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
-
- 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
- B01D25/003—Filters formed by clamping together several filtering elements or parts of such elements integrally combined with devices for controlling the filtration
-
- 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
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/172—Plate spreading means
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
- Measuring Fluid Pressure (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The present invention relates to pressure filters, and more particularly to horizontal plate pressure filters in which a filter chamber is formed between a plurality of filter plates extending horizontally and stacked. Such filters are also known as tower presses. At least one movable squeeze plate is disposed above or below the filter plate, which includes an inclinometer that measures the inclination of the squeeze plate during movement. An alarm is activated if the tilt angle exceeds a threshold to prevent damage to the system.
Description
Technical Field
The present disclosure relates to pressure filters, and more particularly to horizontal plate pressure filters in which filter chambers are formed between horizontally extending and stacked filter plates. Such filters are also known as tower presses (tower presses).
Background
The horizontal plate pressure filter has a plurality of horizontally extending and stacked filter plates with filter chambers formed therebetween. During operation, the filter plates are pressed against each other so as to seal the filter chamber between the filter plates. The slurry is then fed into a filter chamber and the filtrate is separated therefrom, while the solid components of the slurry form a filter cake within the filter chamber. The filter plates are then moved away from each other to open the filter chambers, so that the filter cake can be discharged from the filter chambers, and further moved towards each other to close the filter chambers again. This sequence is then repeated.
Disclosure of Invention
According to a first aspect of the present invention, there is provided a pressure filter, comprising: a plurality of filter plates, wherein each filter plate is in a horizontal plane and the plurality of filter plates are arranged in a vertically stacked manner to form a filter chamber between adjacent filter plates; an upper pressing plate disposed above the uppermost filter plate; a lower pressing plate disposed under the lowermost filter plate; wherein at least one of the upper and lower squeeze plates is a movable squeeze plate configured to move vertically to create a pressure seal between adjacent filter plates to form the filter chamber; wherein the pressure filter further comprises at least one inclinometer located on the movable compression plate, wherein the inclinometer is configured to measure an inclination of the movable compression plate during movement of the movable compression plate, and wherein the pressure filter is configured to activate an alarm if the inclination exceeds a threshold.
In one embodiment, the pressure filter includes at least one inclinometer on the upper compression plate and at least one inclinometer on the lower compression plate.
In one embodiment, the inclinometer is a two axis inclinometer, and wherein the inclinometer is configured to measure the inclination of the movable stripper plate along at least two perpendicular axes.
In one embodiment, the at least two vertical axes lie in a horizontal plane.
In one embodiment, the threshold is plus/minus three degrees from zero, where zero represents the compression plate is completely horizontal.
In one embodiment, the inclinometer is located in a protective housing.
In one embodiment, the movable compression plate is moved via one or more of a hydraulic, electric, pneumatic, or mechanical actuator.
In one embodiment, both the upper and lower squeeze plates are movable squeeze plates, wherein one of the upper and lower squeeze plates is moved by a motor system, and wherein the other squeeze plate is moved by hydraulic pressure, and wherein at least the squeeze plate movable by hydraulic pressure comprises the inclinometer.
According to a second aspect of the present invention, there is provided a method of operating a pressure filter comprising a plurality of filter plates, wherein each filter plate is in a horizontal plane and the plurality of filter plates are arranged in a vertically stacked manner to form a filter chamber between adjacent filter plates, an upper compression plate being disposed above an uppermost filter plate and a lower compression plate being disposed below a lowermost filter plate, the method comprising: vertically moving at least one of the upper and lower squeeze plates to create a pressure seal between adjacent filter plates to form the filter chamber; measuring an inclination angle of the upper or lower squeeze plate during movement of the squeeze plate; and if the measured tilt exceeds a threshold, activating an alarm.
In one embodiment, the pressure filter comprises at least one inclinometer on the upper compression plate and at least one inclinometer on the lower compression plate, and wherein the method comprises measuring the inclination of both the upper compression plate and the lower compression plate during movement of the compression plate.
In one embodiment, the inclinometer is a two axis inclinometer, and wherein the inclination of the movable squeeze plate is measured along at least two perpendicular axes.
In one embodiment, the at least two vertical axes lie within the horizontal plane.
In one embodiment, the threshold is plus/minus three degrees from zero, where zero represents the compression plate is completely horizontal.
In one embodiment, the inclinometer is located in a protective housing.
In one embodiment, the movable compression plate is moved via one or more of hydraulic, electric, pneumatic, or mechanical actuators.
In one embodiment, both the upper and lower squeeze plates are movable squeeze plates, wherein one of the upper and lower squeeze plates is moved by a motor system and the other squeeze plate is moved by hydraulic pressure, and wherein at least the squeeze plate movable by hydraulic pressure comprises the inclinometer.
Additional advantageous features of the invention are listed below.
Drawings
Fig. 1 shows a horizontal filter press (FILTER PRESS) according to the present invention.
Fig. 2 illustrates a method of operating a pressure filter according to the present invention.
Detailed Description
Fig. 1 shows a pressure filter 100. The pressure filter comprises a plurality of filter plates 101 arranged in a vertically stacked manner, i.e. as cylinders extending along the Z-axis, as shown in fig. 1. Each filter plate 101 lies in a horizontal plane, i.e. the two major dimensions of the filter plate lie in an X-Y plane perpendicular to the Z axis as shown in fig. 1. Each filter plate 101 is parallel to and offset from the other filter plates. The filter plates 101 and other components located between the filter plates are shaped so that when the filter plates 101 are pressed together, a filter chamber is formed between each pair of adjacent filter plates 101.
Above the filter plate 101, sometimes referred to as a header plate (HEAD PLATE), and below the filter plate 101 is a lower compression plate 103, sometimes referred to as a tail plate (TAIL PLATE), a back plate, or an end plate. By moving the upper and lower squeeze plates 102, 103, the filter plates 101 can be moved away from each other and towards each other to open and close the filter chambers.
The upper actuator 104 is configured to move the upper squeeze plate and the lower actuator 105 is configured to move the lower squeeze plate. The pressure and force required to seal the filter chamber is much greater than that required to open and close the filter chamber and thus the actuators 104 and 105 must be sized accordingly for each purpose. In the configuration shown in fig. 1, the upper actuator 104 is configured to generate the large displacement and small force required to open and close the filter chamber, while the lower actuator 105 is configured to generate the small displacement and large force required to seal the filter chamber. Once the upper press plate 102 and the filter plate 101 are in the closed position after actuation of the upper actuator 104, the upper press plate 102 may be locked in place by the locking pins 106.
Different types of actuators may be used due to the different displacement and force requirements of the upper and lower actuators 104, 105. In a preferred embodiment, the upper actuator 104 is an electric actuator that can be coupled with mechanical devices such as gears and chains or pulleys to produce the desired displacement. The lower actuator 105 is preferably a hydraulic actuator capable of providing the force required to seal the filter chamber. However, the particular type of actuator employed by each of the upper and lower actuators 104, 105 is not the focus of the present invention, and the present invention may be used with virtually any horizontal pressure filter, regardless of the type of actuator used to move the upper and lower squeeze plates.
Further, although in the pressure filter shown in fig. 1, the high displacement, low force actuator drives the upper squeeze plate to move, and the low displacement, high force actuator drives the lower squeeze plate to move, this arrangement may be reversed, in which case the locking pin 106 will also appear on the lower squeeze plate 103 instead of the upper squeeze plate 102. Thus, while the present disclosure is directed to "upper" and "lower" squeeze plates, as shown in FIG. 1, it should be understood that this arrangement may be reversed and that it is not essential to the present invention that the actual location of the squeeze plates be "upper" or "lower".
In the pressure filter shown in fig. 1, the lower squeeze plate 103 (i.e., the squeeze plate that creates the pressure seal) further includes an inclinometer (inclinometer) 107 configured to measure the inclination of the lower squeeze plate 103. The pressure filter 100 (more specifically, the control system of the pressure filter 100) is configured to measure and monitor the inclination angle of the lower squeeze plate 103 as the lower squeeze plate is moved by the lower actuator 105 to create a pressure seal between the filter plates 101. Misalignment of the lower compression plate 103 relative to the filter plates 101 may preferably result in an imperfect seal between the filter plates 101 and, in worse cases, damage to the compression plate 103 and/or the filter plates 101. Accordingly, the pressure filter control system is configured to activate an alarm if the tilt angle of the lower squeeze plate 103 exceeds a threshold value during movement of the lower squeeze plate 103. Misalignment may be caused, for example, by hydraulic fluid leakage, or some other failure in the actuator or in the mechanism coupling the actuator to one or more compression plates.
The inclinometer is preferably capable of measuring the inclination of the lower squeeze plate 103 in at least two perpendicular axes. Preferably, the two perpendicular axes are parallel to the X-axis and the Y-axis shown in fig. 1, in other words the sensing axis of the inclinometer is in the horizontal plane.
The threshold for activating the alarm may depend on the size of the squeeze plate used, as the angle measured by inclinometer 107 reflects that in the case of a larger squeeze plate, the deflection of the squeeze plate from the ideal position is greater than in the case of a smaller squeeze plate. Similarly, if rectangular compression plates are employed, the threshold value for each axis may be different, as the length of the compression plate may be greater than the width and vice versa, resulting in different tolerances. As an exemplary value, a threshold of three degrees may be used, i.e., three degrees higher or lower than zero, where zero indicates that the compression plate is horizontal.
The inclinometer 107 is preferably located in a protective housing to protect it from liquids and other contaminants present in the pressure filter system.
In addition to the inclinometer connected to the lower squeeze plate 103 and configured to measure its inclination, the pressure filter 100 may also include a second inclinometer (not shown) located on the upper squeeze plate 102, the second inclinometer configured to operate in the same manner as the inclinometer 107 described above. Although the plate is less prone to damage due to the small forces exerted by the actuator, the plate is configured to move a large distance so any misalignment will appear to be prominent over the total displacement.
Alternatively, the inclinometer may be present only on the upper stripper plate 102, i.e. on that stripper plate driven by a high displacement, low force actuator.
Fig. 2 shows a method of operating a pressure filter according to the invention. In step 201, the compression plate 102/103 is moved by the actuator 104/105. During the movement of the compression plate, the tilt angle is monitored by a tilt angle sensor as described above.
In step 202, it is checked whether the tilt angle exceeds a threshold value, as described above. During the movement of the compression plate, the inspection of step 202 is performed periodically and/or repeatedly (unless the threshold is exceeded at the time of the first inspection). Thus, if the measured tilt angle does not exceed the threshold, the process continues at step 203 and returns to step 201 (the compression plate 102/103 continues to be moved at step 201).
If the measured tilt exceeds the threshold, processing moves to step 204; at step 204, an alarm is activated and, optionally, the movement of the squeeze plate is automatically stopped to prevent damage.
Claims (16)
1. A pressure filter, comprising:
a plurality of filter plates, wherein the plurality of filter plates are arranged in a vertically stacked manner and the filter plates and other components located between the filter plates are shaped to form filter chambers between adjacent filter plates when the filter plates are pressed together;
an upper pressing plate disposed above the uppermost filter plate;
A lower pressing plate disposed under the lowermost filter plate;
wherein at least one of the upper and lower squeeze plates is a movable squeeze plate configured to move vertically to create a pressure seal between adjacent filter plates to form the filter chamber;
wherein the pressure filter further comprises at least one inclinometer located on the movable compression plate, wherein the inclinometer is configured to measure an inclination of the movable compression plate during movement of the movable compression plate, and wherein the pressure filter is configured to activate an alarm if the inclination exceeds a threshold.
2. The pressure filter of claim 1, wherein the pressure filter comprises at least one inclinometer on the upper squeeze plate and at least one inclinometer on the lower squeeze plate.
3. The pressure filter of claim 1 or 2, wherein the inclinometer is at least two axis inclinometers, and wherein the inclinometers are configured to measure the inclination of the movable squeeze plate along at least two perpendicular axes.
4. A pressure filter as claimed in claim 3, wherein the at least two vertical axes lie in a horizontal plane.
5. The pressure filter of claim 1 or 2, wherein the threshold is plus/minus three degrees from zero, where zero represents that the compression plate is completely horizontal.
6. A pressure filter as claimed in claim 1 or 2, wherein the inclinometer is located in a protective housing.
7. The pressure filter of claim 1 or 2, wherein the movable squeeze plate is moved via one or more of a hydraulic, electric, pneumatic, or mechanical actuator.
8. The pressure filter of claim 1 or 2, wherein both the upper and lower squeeze plates are movable squeeze plates, wherein one of the upper and lower squeeze plates is moved by a motor system, and wherein the other squeeze plate is moved by hydraulic pressure, and wherein at least the squeeze plate movable by hydraulic pressure comprises the inclinometer.
9. A method of operating a pressure filter comprising a plurality of filter plates, wherein each filter plate is in a horizontal plane and the plurality of filter plates are arranged in a vertically stacked manner to form a filter chamber between adjacent filter plates, an upper compression plate being disposed above an uppermost filter plate and a lower compression plate being disposed below a lowermost filter plate, the method comprising:
Vertically moving at least one of the upper and lower squeeze plates to create a pressure seal between adjacent filter plates to form the filter chamber;
Measuring an inclination angle of the upper or lower squeeze plate during movement of the squeeze plate; and
If the measured tilt exceeds a threshold, an alarm is activated.
10. The method of claim 9, wherein the pressure filter comprises at least one inclinometer on the upper squeeze plate and at least one inclinometer on the lower squeeze plate, and wherein the method comprises measuring inclination angles of both the upper squeeze plate and the lower squeeze plate during movement of the squeeze plates.
11. The method of claim 10, wherein the inclinometer is a two axis inclinometer, and wherein the inclination of the movable squeeze plate is measured along at least two perpendicular axes.
12. The method of claim 11, wherein the at least two vertical axes lie within the horizontal plane.
13. The method of claim 9 or 10, wherein the threshold is plus/minus three degrees from zero, wherein zero represents that the compression plate is completely horizontal.
14. The method of claim 10, wherein the inclinometer is located in a protective housing.
15. The method of claim 9 or 10, wherein the movable compression plate is moved via one or more of a hydraulic, electric, pneumatic, or mechanical actuator.
16. The method of claim 10, wherein both the upper and lower squeeze plates are movable squeeze plates, wherein one of the upper and lower squeeze plates is moved by a motor system and the other squeeze plate is moved by hydraulic pressure, and wherein at least the squeeze plate movable by hydraulic pressure comprises the inclinometer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNPCT/CN2020/099314 | 2020-06-30 | ||
| PCT/CN2020/099314 WO2022000274A1 (en) | 2020-06-30 | 2020-06-30 | Pressure filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113856264A CN113856264A (en) | 2021-12-31 |
| CN113856264B true CN113856264B (en) | 2024-05-14 |
Family
ID=78990014
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121476173.2U Active CN216604184U (en) | 2020-06-30 | 2021-06-30 | Pressure filter |
| CN202110732601.1A Active CN113856264B (en) | 2020-06-30 | 2021-06-30 | Pressure filter |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121476173.2U Active CN216604184U (en) | 2020-06-30 | 2021-06-30 | Pressure filter |
Country Status (3)
| Country | Link |
|---|---|
| CN (2) | CN216604184U (en) |
| AR (1) | AR122799A1 (en) |
| WO (1) | WO2022000274A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022000274A1 (en) * | 2020-06-30 | 2022-01-06 | Metso Outotec Finland Oy | Pressure filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN216604184U (en) * | 2020-06-30 | 2022-05-27 | 美卓奥图泰芬兰有限公司 | Pressure filter |
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| US3608734A (en) * | 1968-07-31 | 1971-09-28 | John R Schneider | Liquid filtering apparatus |
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-
2020
- 2020-06-30 WO PCT/CN2020/099314 patent/WO2022000274A1/en active Application Filing
-
2021
- 2021-06-29 AR ARP210101816A patent/AR122799A1/en unknown
- 2021-06-30 CN CN202121476173.2U patent/CN216604184U/en active Active
- 2021-06-30 CN CN202110732601.1A patent/CN113856264B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202119423U (en) * | 2011-05-23 | 2012-01-18 | 唐海涛 | Measuring device of rear inclination/inner inclination of master pin |
| CN103211599A (en) * | 2013-05-13 | 2013-07-24 | 桂林电子科技大学 | Method and device for monitoring tumble |
| CN104548692A (en) * | 2014-12-30 | 2015-04-29 | 核工业烟台同兴实业有限公司 | Filter cloth deviation correcting device for vertical filter press |
| CN106039788A (en) * | 2016-05-13 | 2016-10-26 | 安庆市峰邦工业产品设计有限公司 | Tension and position offset adjusting device for filter cloth of sludge press filter |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN216604184U (en) | 2022-05-27 |
| AR122799A1 (en) | 2022-10-05 |
| WO2022000274A1 (en) | 2022-01-06 |
| CN113856264A (en) | 2021-12-31 |
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