CN114712925A - External circular filter screen of desulfurization circulating pump - Google Patents
External circular filter screen of desulfurization circulating pump Download PDFInfo
- Publication number
- CN114712925A CN114712925A CN202110010892.3A CN202110010892A CN114712925A CN 114712925 A CN114712925 A CN 114712925A CN 202110010892 A CN202110010892 A CN 202110010892A CN 114712925 A CN114712925 A CN 114712925A
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- Prior art keywords
- filter screen
- circular filter
- shell
- circulating pump
- desulfurization circulating
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- 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.)
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 43
- 230000023556 desulfurization Effects 0.000 title claims abstract description 43
- 239000002002 slurry Substances 0.000 claims abstract description 31
- 238000005192 partition Methods 0.000 claims abstract description 16
- 238000011010 flushing procedure Methods 0.000 claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims abstract 2
- 239000000463 material Substances 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 30
- 238000010521 absorption reaction Methods 0.000 description 10
- 239000012535 impurity Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
- B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/30—Filter housing constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an external circular filter screen of a desulfurization circulating pump, which comprises a shell, wherein a manhole is arranged at the top end of the shell, two groups of saddle supports are arranged at the bottom end of the shell, a slurry outlet is formed in the left side of the shell, a slurry inlet is formed in the right side of the shell, a partition plate is fixedly arranged in the shell, the circular filter screen is arranged on one side, close to the slurry inlet, of the partition plate, a plurality of groups of bolts are welded in the partition plate in a penetrating manner, a flushing port A is formed below the slurry outlet of the shell, a flushing port B is formed below the slurry inlet of the shell, and a drain outlet is formed in the center of the bottom of the shell. Compared with the traditional filter screen, the external circular filter screen of the desulfurization circulating pump has high strength and less material consumption, is small in size when in use, is convenient to enter the shell through the manhole, is convenient to install and maintain, adopts a circular structure, is not easy to accumulate and block at the upper part, and improves the reliability of safe operation of the desulfurization circulating pump.
Description
Technical Field
The invention relates to the technical field of flue gas desulfurization, in particular to an external circular filter screen of a desulfurization circulating pump.
Background
At present, in the flue gas desulfurization system of power plant, the filter screen is set up at desulfurization absorption tower thick liquid circulating pump entry, prevents that debris in the thick liquid from getting into the thick liquid circulating pump and causing the vibration of thick liquid circulating pump and damage even, causes the important means that sprays layer nozzle and block up. With the increasingly strict requirements of the country on environmental protection, the bypass damper of the desulfurization system of the power plant is cancelled, and the desulfurization equipment needs to operate stably and continuously. Therefore, when most power plants are desulfurized and reformed, the filter screen in the tower is designed in front of the inlet of the slurry circulating pump. However, the filter screen at the inlet of the traditional slurry circulating pump of the absorption tower is arranged in the absorption tower, namely the filter screen is arranged before the slurry of the absorption tower exits the tower, the built-in filter screen is inconvenient to clean in use, the desulfurization system needs to be stopped, and the slurry of the absorption tower can enter the tower to maintain the filter screen after being discharged. And filter screen intensity is not high in traditional tower, and when the filter screen blockked up, the condition that the filter screen was inhaled to flatten appears often, influences the desulfurization safety operation. The filter screen blocks up, causes thick liquid circulating pump impeller cavitation very easily, shortens circulating pump impeller life, can cause the gypsum thick liquid to spray the effect not good simultaneously, causes the serious consequence that desulfurization efficiency is not up to standard, consequently, provides an external circular filter screen of desulfurization circulating pump to above-mentioned problem.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the external circular filter screen of the desulfurization circulating pump, compared with the traditional filter screen, the external circular filter screen has high strength and less material consumption, and when in use, the circular filter screen has small volume, is convenient to enter the shell through a manhole, is convenient to install and maintain, simultaneously adopts a circular structure, has no material accumulation on the upper part, is difficult to block, and improves the reliability of the safe operation of the desulfurization circulating pump.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides an external circular filter screen of desulfurization circulating pump, includes the casing, the top of casing is provided with the manhole, and the casing bottom is provided with two sets of saddle supports, the thick liquid export has been seted up in the casing left side, and the casing right side has seted up the thick liquid entry, the inside fixed mounting of casing has the baffle, and the baffle is close to one side of thick liquid entry and installs circular filter screen, the inside through welding of baffle has the multiunit bolt, the casing is located the below of thick liquid export and has seted up washing mouth A, and the casing is located the below of thick liquid entry and has seted up washing mouth B, the bottom center department of casing has seted up the drain, and the upper end of casing is close to one side of thick liquid export and has seted up thick liquid export pressure measurement mouth, thick liquid entry pressure measurement mouth has been seted up to the upper end of manhole.
Preferably, a plurality of groups of the circular filter screens are connected with the partition plates through bolts.
Preferably, the outer side of the circular filter screen is provided with a circular filter screen cylinder, one side of the circular filter screen cylinder is provided with a circular filter screen bottom plate, and the other side of the circular filter screen cylinder is provided with a circular filter screen flange.
Preferably, the circular filter screen cylinder body and the circular filter screen bottom plate are provided with filter holes, the diameter of each filter hole is 20-25mm, and the distance between the filter holes is 25-32 mm.
Preferably, a rubber gasket is arranged between the circular filter screen flange and the partition plate, and the diameter of an opening of the rubber gasket is slightly smaller than that of the bolt.
(III) advantageous effects
The invention provides an external circular filter screen of a desulfurization circulating pump, which has the following beneficial effects:
(1) when the circular filter screen is used, the circular filter screen is made of alloy stainless steel with the thickness of 4mm, and compared with the traditional semi-cylindrical filter screen with the thickness of 6mm, the circular filter screen saves materials;
(2) when the circular filter screen is arranged outside the desulfurization circulating pump, the diameter of a cylinder body of the circular filter screen is one third of that of a traditional semi-cylindrical filter screen, the cylinder body of the circular filter screen is enlarged by 3 times, the wall thickness of the cylinder body of the circular filter screen is equal to 12mm thick and is twice as thick as 6mm of the traditional semi-cylindrical filter screen, so that the circular filter screen has high strength and is not flat;
(3) when the circular filter screen is arranged outside the desulfurization circulating pump, the circular filter screen is small in size, can conveniently enter the shell through a manhole and is convenient to install and maintain;
(4) when the circular filter screen is arranged outside the desulfurization circulating pump, when the circular filter screen is used, the upper part of the traditional semi-cylindrical filter screen is an inclined plane, so that impurities are easily adsorbed to block the filter screen, and the safe operation of desulfurization is influenced;
(5) this external circular filter screen of desulfurization circulating pump, when using, the impurity that the filter screen can't be in the absorption tower is outer arranges in traditional tower, and the external circular filter screen of desulfurization circulating pump can in time discharge the impurity in the absorption tower. The slurry enters the shell from the slurry inlet, is filtered by the circular filter screen and then is discharged from the slurry outlet. After the operation is carried out for a period of time, when the negative pressure of the pressure measuring port at the slurry outlet is greater than the negative pressure of the pressure measuring port at the slurry inlet by a certain value, the excessive impurities in the filter screen are indicated, and the impurities need to be removed. Closing the circulating pump, opening the drain outlet, opening the flushing port A and the flushing port B, flushing impurities, and then restarting the circulating pump;
(6) this external circular filter screen of desulfurization circulating pump, when using, the external circular filter screen of desulfurization circulating pump blocks up or damages, need not stop transport desulfurization system, need not discharge the absorption tower thick liquid, only needs to close the valve of thick liquid entry, opens the drain, arranges the pipeline thick liquid to the greatest extent, just can get into the casing through the manhole and overhaul the maintenance, saves the maintenance cost.
Drawings
FIG. 1 is a schematic view of the overall structure of an external circular filter screen of a desulfurization circulating pump according to the present invention;
FIG. 2 is a left side view of an external circular filter screen of a desulfurization circulating pump according to the present invention;
FIG. 3 is a top view of an external circular filter screen of a desulfurization circulating pump according to the present invention;
FIG. 4 is a top view of the internal structure of an external circular filter screen of a desulfurization circulating pump according to the present invention;
FIG. 5 is a front view of a circular filter screen in the external circular filter screen of the desulfurization circulating pump of the present invention.
In the figure: 1. a housing; 2. a manhole; 3. a saddle support; 4. a slurry outlet; 5. a slurry inlet; 6. a partition plate; 7. a circular filter screen; 7.1, a circular filter screen cylinder; 7.2, a circular filter screen bottom plate; 7.3, a circular filter screen flange; 8. a bolt; 9. a flushing port A; 10. flushing the opening B; 11. a sewage draining outlet; 12. a pressure measuring port at the slurry outlet; 13. a slurry inlet pressure port; 14. a rubber gasket.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution:
the utility model provides an external circular filter screen of desulfurization circulating pump, which comprises a housin 1, the top of casing 1 is provided with manhole 2, and 1 bottom of casing is provided with two sets of saddle support 3, thick liquid export 4 has been seted up in casing 1 left side, and thick liquid entry 5 has been seted up on the 1 right side of casing, the inside fixed mounting of casing 1 has baffle 6, and baffle 6 is close to one side of thick liquid entry 5 and installs circular filter screen 7, the inside through welding of baffle 6 has multiunit bolt 8, casing 1 is located the below of thick liquid export 4 and has seted up washing mouth A9, and casing 1 is located the below of thick liquid entry 5 and has seted up washing mouth B10, drain 11 has been seted up to casing 1's bottom center department, and pressure measurement thick liquid export 12 has been seted up to one side that casing 1's upper end is close to thick liquid export 4, thick liquid entry 13 has been seted up to manhole 2's upper end, can measure thick liquid entry pressure.
The circular filter screens 7 of a plurality of groups are connected with the partition plates 6 through bolts 8, and the circular filter screens 7 are made of alloy stainless steel.
The outside of circular filter screen 7 is provided with circular filter screen barrel 7.1, and one side of circular filter screen barrel 7.1 is provided with circular filter screen bottom plate 7.2, and the opposite side is provided with circular filter screen flange 7.3, and circular filter screen barrel 7.1 and circular filter screen bottom plate 7.2 adopt 4mm thick alloy stainless steel to make.
The circular filter screen cylinder body 7.1 and the circular filter screen bottom plate 7.2 are provided with filter holes, the diameter of each filter hole is 20-25mm, and the distance between the filter holes is 25-32 mm.
A rubber gasket 14 is arranged between the circular filter screen flange 7.3 and the partition plate 6, the diameter of an opening of the rubber gasket 14 is slightly smaller than that of the bolt 8, the bolt 8 can be slightly locked without moving, and the installation of the circular filter screen 7 and the partition plate 6 is facilitated.
It should be noted that, the invention is an external circular filter screen of a desulphurization circulating pump, when in use, as shown in fig. 4, the center of the partition plate 6 and a plurality of circular filter screen flanges 7.3 with holes are annularly arranged at the center of the partition plate 6, which is convenient for installing the circular filter screen 7, after the circular filter screen 7 is installed, the operation is formally carried out, firstly, the slurry enters the shell 1 from the slurry inlet 5, filtered by a circular filter screen 7 and discharged from a slurry outlet 4, when the operation lasts for a period of time and the negative pressure of a slurry outlet pressure measuring port 12 is greater than the negative pressure of a slurry inlet pressure measuring port 13 by a certain value, indicating that the impurities in the circular filter screen 7 are excessive and need to be removed, closing the circulating pump, opening the sewage discharge outlet 11, opening the flushing port A9 and the flushing port B10 to flush the impurities completely, then the circulating pump is restarted, and the impurities in the absorption tower can be discharged in time through the external circular filter screen 7 of the desulfurization circulating pump, so that the high-efficiency safe operation of the desulfurization circulating pump is ensured.
The external circular filter screen 7 of desulfurization circulating pump blocks up or damages, does not need to shut down the desulfurization system, does not need to discharge the absorption tower thick liquid, only needs to close the valve of thick liquid entry 5 and thick liquid export 4, opens drain 11, arranges the pipeline thick liquid to the greatest extent, and maintainer just can get into the maintenance of examining and repairing in the casing 1 through manhole 2, saves the maintenance cost.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides an external circular filter screen of desulfurization circulating pump, includes casing (1), its characterized in that: the top end of the shell (1) is provided with a manhole (2), the bottom end of the shell (1) is provided with two groups of saddle-type supports (3), a slurry outlet (4) is formed in the left side of the shell (1), a slurry inlet (5) is formed in the right side of the shell (1), a partition plate (6) is fixedly arranged in the shell (1), a circular filter screen (7) is arranged on one side, close to the slurry inlet (5), of the partition plate (6), a plurality of groups of bolts (8) are welded in the partition plate (6) in a penetrating manner, a flushing opening A (9) is formed below the slurry outlet (4) of the shell (1), a flushing opening B (10) is formed below the slurry inlet (5) of the shell (1), a drain outlet (11) is formed in the center of the bottom of the shell (1), and a slurry outlet pressure measuring opening (12) is formed in one side, close to the slurry outlet (4), of the upper end of the shell (1), and a slurry inlet pressure measuring port (13) is formed in the upper end of the manhole (2).
2. The external circular filter screen of the desulfurization circulating pump of claim 1, which is characterized in that: the circular filter screens (7) of a plurality of groups are connected with the partition plates (6) through bolts (8).
3. The external circular filter screen of the desulfurization circulating pump according to claim 1, characterized in that: the outside of circular filter screen (7) is provided with circular filter screen barrel (7.1), and one side of circular filter screen barrel (7.1) is provided with circular filter screen bottom plate (7.2), and the opposite side is provided with circular filter screen flange (7.3).
4. The external circular filter screen of the desulfurization circulating pump according to claim 3, characterized in that: the circular filter screen cylinder body (7.1) and the circular filter screen bottom plate (7.2) are provided with filter holes, the diameter of each filter hole is 20-25mm, and the distance between the filter holes is 25-32 mm.
5. The external circular filter screen of the desulfurization circulating pump according to claim 1 or 3, wherein: a rubber gasket (14) is arranged between the circular filter screen flange (7.3) and the partition plate (6), and the diameter of an opening of the rubber gasket (14) is slightly smaller than that of the bolt (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110010892.3A CN114712925A (en) | 2021-01-06 | 2021-01-06 | External circular filter screen of desulfurization circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110010892.3A CN114712925A (en) | 2021-01-06 | 2021-01-06 | External circular filter screen of desulfurization circulating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114712925A true CN114712925A (en) | 2022-07-08 |
Family
ID=82234651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110010892.3A Pending CN114712925A (en) | 2021-01-06 | 2021-01-06 | External circular filter screen of desulfurization circulating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114712925A (en) |
-
2021
- 2021-01-06 CN CN202110010892.3A patent/CN114712925A/en active Pending
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