CN113856320A - Desulfurization slurry filtering method and structure - Google Patents

Desulfurization slurry filtering method and structure Download PDF

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Publication number
CN113856320A
CN113856320A CN202111224876.0A CN202111224876A CN113856320A CN 113856320 A CN113856320 A CN 113856320A CN 202111224876 A CN202111224876 A CN 202111224876A CN 113856320 A CN113856320 A CN 113856320A
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desulfurization slurry
filter screen
desulfurization
filter
inclined plane
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CN113856320B (en
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文丰正
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Longtan Hydropower Development Co Ltd Heshan Power Generation Co
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Longtan Hydropower Development Co Ltd Heshan Power Generation Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/04—Combinations of filters with settling tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
    • B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
    • B01D33/0346—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements
    • B01D33/0353—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements self-supporting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/48—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
    • 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
    • B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80—Semi-solid phase processes, i.e. by using slurries
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
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Abstract

The invention discloses a desulfurization slurry filtering method and a structure, comprising the following steps: at least one strand of desulfurization thick liquid pours into the filter chamber into, utilizes the upset of filter chamber inner wall guide desulfurization thick liquid upwind, utilizes the concave-convex structure of filter chamber inner wall to confront the desulfurization thick liquid of upwind upset for the debris impact force of desulfurization thick liquid weakens and automatic settlement, and the desulfurization thick liquid upwelling of buffering passes through the filter screen and accomplishes the filtration. The invention utilizes the inner wall of the filter cavity to buffer and guide the desulfurization slurry to be rolled and turned, the potential energy is reduced when the desulfurization slurry is rolled and overcome the gravity in the rolling process, meanwhile, the desulfurization slurry is resisted by the concave-convex structure of the inner wall of the filter cavity, the impact force of the desulfurization slurry is reduced, impurities in the desulfurization slurry are deposited in a losing state in the rolling and turning process, and the desulfurization slurry continuously flows upwards to pass through the filter screen to complete the filtration, so the impact of the desulfurization slurry and the impurities on the filter screen is effectively reduced, the adhesion of the impurities on the filter screen is reduced, the maintenance and the blockage of the filter screen are reduced, the safety and the reliability of equipment are improved, and the maintenance cost is greatly reduced.

Description

Desulfurization slurry filtering method and structure
Technical Field
The invention relates to the technical field of flue gas desulfurization, in particular to a desulfurization slurry filtering method and a structure.
Background
In the wet flue gas desulfurization process, slurry in the absorption tower is pumped to a slurry nozzle at the upper part of the absorption tower by a slurry circulating pump to spray and wash flue gas and then returns to the absorption tower, and the circulation is carried out so as to form continuous operation of flue gas desulfurization of the coal-fired power plant. Based on the special working conditions of corrosivity, abrasion and the like of a desulfurization system, the slurry contains more sundries such as glass flakes, lining rubber, scaling substances, stones and the like, and the sundries easily block the nozzle, seriously affect the performance of the nozzle and affect the slurry ejection amount of the nozzle so as to reduce the desulfurization efficiency.
The slurry is filtered by the filter screen, so that the slurry is a common technology at present, the filter screen is frequently blocked, and the filter screen is deformed and damaged due to impact of impurities, so that the impurities are frequently cleaned manually, the filter screen is required to be maintained and replaced, the maintenance cost is increased, and the safety and reliability of the slurry are reduced.
Disclosure of Invention
It is an object of the present invention to address at least the above-mentioned deficiencies and to provide at least the advantages which will be described hereinafter.
The invention also aims to provide a desulfurization slurry filtering method, which is characterized in that at least one strand of desulfurization slurry is injected into a filtering cavity, the desulfurization slurry is guided to roll up and turn inwards by utilizing an inclined surface, an upward-rushing desulfurization slurry is resisted by utilizing a concave-convex structure, so that sundries such as glass flakes, lining rubber, scaling substances, stones and the like lose impact force and settle downwards, the desulfurization slurry continuously rushes upwards through a filter screen to be filtered, the impact of the sundries on the filter screen is reduced, and the blockage of the filter screen is reduced.
The invention also aims to provide a desulfurization slurry filtering structure, which can build a state that desulfurization slurry is rolled up on the lower inclined surface of a filtering cavity, the upper inclined surface of the filtering cavity is overturned and impacts a concave-convex structure, impurities in the desulfurization slurry lose potential due to impact, settle and collect downwards, and the desulfurization slurry after impact buffering flows upwards to pass through a filter screen to complete filtering, so that the impact and the blockage of the impurities and the desulfurization slurry on the filter screen are effectively reduced.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a desulfurization slurry filtration method comprising:
at least one strand of desulfurization slurry is injected into the filter chamber, the desulfurization slurry is guided to roll up and turn over by utilizing the inner wall of the filter chamber, and the desulfurization slurry which is rolled up and turned over is resisted by utilizing the concave-convex structure of the inner wall of the filter chamber, so that the impact force of impurities of the desulfurization slurry is weakened and the desulfurization slurry automatically settles, and the obtained desulfurization slurry which is buffered by resisting upwells and passes through the filter screen to complete filtration.
Among the above-mentioned technical scheme, utilize the filter chamber inner wall to cushion and guide the upset of the desulfurization thick liquid epilogue, the epilogue process is overcome gravity and the potential energy reduces, the desulfurization thick liquid is resisted by the concave-convex structure of filter chamber inner wall simultaneously, the impact force of desulfurization thick liquid reduces, debris that roll up in the upset in-process desulfurization thick liquid is out of potential energy and is subsided, and the desulfurization thick liquid continues to upwelling and accomplishes the filtration through the filter screen, consequently, the effectual desulfurization thick liquid and the impact of debris to the filter screen that has reduced, the adhesion of debris to the filter screen has been reduced, reduce the maintenance and the jam of filter screen, equipment fail safe nature improves, maintenance cost greatly reduced.
Preferably, in the desulfurization slurry filtering method, when the desulfurization slurry passes through the filter screen, the filter screen is driven to vibrate, so that the adhesion and blockage of impurities to the filter screen are reduced.
The vibration of the filter screen can effectively prevent sundries from adhering to the filter screen, and reduce blockage. The mode of drive filter screen has the multiple, and the filter screen should have the space of vibration at first, and the filter screen is propped up by the elastic component, can vibrate in the vibration space when desulfurization thick liquid strikes, except the impact of desulfurization thick liquid, can also pass through vibrating motor initiative drive filter screen vibration.
Preferably, in the desulfurization slurry filtration method, a lower portion of the filter chamber is configured to: the lower inclined plane which faces upwards and outwards is used for guiding the desulfurized slurry to roll up;
the upper part of the filter cavity is formed as follows: has an upward and inward upper slope; the upper inclined plane and the lower inclined plane form a smooth and continuous arc surface, or the upper inclined plane and the lower inclined plane are independent and connected so as to guide the upward-rolled desulfurization slurry to turn inwards;
the desulfurization slurry injected into the filter cavity enters along the lower inclined surface.
In the above-mentioned scheme, it is last inclined plane and lower inclined plane to construct the filter chamber inner wall, it can be the plane and interconnect and form the contained angle to go up inclined plane and lower inclined plane, also can be slick and sly continuous cambered surface, the desulfurization thick liquid that such structure homoenergetic effectively guides the injection is rolled up and inwards overturns, form the desulfurization thick liquid and upwelled, heavier debris drop the state of subsiding downwards, especially after being resisted the impact by concave-convex structure, debris drop more easily, after a large amount of heavier debris are detached to the desulfurization thick liquid that upwelled, can prevent effectively that the filter screen from being damaged by the impact, and the desulfurization thick liquid also because upwelling upset and concave-convex structure's resistance, the impact force reduces greatly, the impact to the filter screen obviously reduces, the life of filter screen lengthens, the jam condition of filter screen reduces, the maintenance number of times reduces, and cost is reduced.
Desulfurization slurry filtration structure includes:
the lower part of the filter cavity is provided with an upward and outward lower inclined plane, and the upper part of the filter cavity is provided with an upward and inward upper inclined plane; the upper inclined surface and the lower inclined surface are connected to form a joint surface, or the upper inclined surface and the lower inclined surface form a continuous cambered surface;
the concave-convex structure is at least formed on the upper inclined plane of the filter cavity;
the filter screen is formed at the top of the filter cavity;
the desulfurization slurry is input from the lower part of the filter cavity, rises along the lower inclined surface, overturns along the upper inclined surface and impacts the concave-convex structure, so that impurities of the desulfurization slurry lose force and are overturned downwards for settlement, and the desulfurization slurry continuously upwelles to pass through the filter cavity to complete filtration.
Among the above-mentioned technical scheme, it is last inclined plane and lower inclined plane to establish the filter chamber inner wall, it can be the plane and interconnect and form the contained angle to go up inclined plane and lower inclined plane, also can be slick and sly continuous cambered surface, such structure homoenergetic effectively guides the desulfurization thick liquid of injection to roll up and inwards overturn, form the desulfurization thick liquid upwelling, heavier debris drop the state of subsiding downwards, especially after being resisted the impact by concave-convex structure, debris drop more easily, after a large amount of heavier debris are detached to the desulfurization thick liquid that upwells, can prevent effectively that the filter screen from being damaged by the impact, and the desulfurization thick liquid is also because upwelling upset and concave-convex structure's resistance, the impact force reduces greatly, the impact to the filter screen obviously reduces, the life of filter screen lengthens, the jam condition of filter screen reduces, the maintenance number of times reduces, cost reduction.
Preferably, in the desulfurization slurry filtration structure, the concavo-convex structure includes: wave-type structures and step-type structures. The wave type and the step type are common concave-convex structures, continuous resistance can be given to the desulfurization slurry, and impurity leakage is reduced. And such concave-convex structure can effectively strengthen the structural strength of corresponding positions, and avoids water flow from impacting and damaging the inner wall.
Preferably, in the desulfurization slurry filtering structure, the wave-shaped structure and the step-shaped structure are arranged in a stepwise manner to give the desulfurization slurry an increasing resistance. The gradual and upward structural design can be based on the gradually-increased resistance of the desulfurization slurry, so that impurities are gradually intercepted, the desulfurization slurry is gradually excessive, and the damage caused by excessive impact of a primary position is avoided.
Preferably, in the desulfurization slurry filtering structure, the concave portion of the concavo-convex structure is disposed downward or obliquely downward to prevent impurities from being accumulated in the concave portion. When the desulfurization slurry impacts the concave-convex structure, impurities are easy to gather in the concave part, and the design that the concave part is opened downwards can enable the impurities to automatically fall off due to gravity, so that the impurities are prevented from being deposited in the concave part.
Preferably, in the desulfurization slurry filtration structure, the concavo-convex structure is a multi-layer concavo-convex arrangement structure in which the concave portions are arranged one by one on the convex portions. The structure is convenient to process, has good effect on reinforcing the structure of the inner wall of the filter cavity, and has wide coverage range of the desulfurization slurry.
Preferably, in the desulfurization slurry filtering structure, the upper inclined plane and the lower inclined plane are in a plane or cambered surface structure;
the desulfurization slurry is injected into the filter cavity in a mode of being tangent to the lower inclined plane or forming an angle of 0-45 degrees with the lower inclined plane and is sprayed on the lower inclined plane, so that the desulfurization slurry can more easily climb up the inclined plane.
Preferably, in the desulfurization slurry filtering structure, a liquid outlet is arranged above the filtering cavity, and the desulfurization slurry passing through the filter screen is discharged from the liquid outlet; the lower part of the filter cavity is provided with a sundries outlet;
an upper spraying unit is arranged above the filter screen, and a lower spraying unit is arranged on the lower side of the filter screen; the upper spraying unit faces and covers the filter screen and is used for spraying and washing the filter screen; the lower spraying unit faces and covers the lower part of the filter cavity and is used for cleaning the lower part of the filter cavity.
Above-mentioned liquid outlet can directly communicate to the desulfurization thick liquid circulating pump, and the desulfurization thick liquid filling opening can directly communicate to the absorption tower, constitutes endless desulfurization thick liquid filtration system, consequently installs very convenient and fast. And the design of spraying the unit can be when shutting down spray rinsing the filter screen to and wash filter screen below position for the inner wall of filter screen and filter chamber can be clean, and whole process need not the workman and gets into wherein to wash, and is simple reliable high-efficient, and the jam condition is few, can solve traditional filter equipment and block up easily, and traditional manual cleaning fail safe nature is low, technical problem with high costs of overhaul.
The invention at least comprises the following beneficial effects:
the method of the invention utilizes the inner wall of the filter cavity to buffer and guide the desulfurization slurry to be rolled and turned, the rolling process overcomes the gravity and the potential energy is reduced, meanwhile, the desulfurization slurry is resisted by the concave-convex structure of the inner wall of the filter cavity, the impact force of the desulfurization slurry is reduced, the sundries in the desulfurization slurry are deposited in a losing state in the rolling and turning process, and the desulfurization slurry continuously upwells and passes through the filter screen to complete the filtration, thereby effectively reducing the impact of the desulfurization slurry and the sundries on the filter screen, reducing the adhesion of the sundries to the filter screen, reducing the maintenance and blockage of the filter screen, improving the safety and reliability of the equipment and greatly reducing the maintenance cost.
The device of the invention constructs the inner wall of the filter cavity into an upper inclined plane and a lower inclined plane, the upper inclined plane and the lower inclined plane can be planes and are connected with each other to form an included angle, and can also be smooth and continuous arc surfaces, the structure can effectively guide injected desulfurization slurry to roll up and turn inwards, so as to form a state that the desulfurization slurry flows upwards, heavier impurities fall downwards and settle, especially after being resisted by a concave-convex structure, the impurities are more easy to fall off, after a large amount of heavier impurities are removed by the upwelled desulfurization slurry, the filter screen can be effectively prevented from being damaged by impact, the desulfurization slurry is resisted by the upwelling turning and the concave-convex structure, the impact force is greatly reduced, the impact on the filter screen is obviously reduced, the service life of the filter screen is prolonged, the blocking condition of the filter screen is reduced, the overhaul frequency is reduced, and the cost is reduced.
The device can be directly communicated with a desulfurization slurry circulating pump, and the desulfurization slurry injection port can be directly communicated with an absorption tower to form a circulating desulfurization slurry filtering system, so that the device is very convenient and quick to install. And the design of spraying the unit can be when shutting down spray rinsing the filter screen to and wash filter screen below position for the inner wall of filter screen and filter chamber can be clean, and whole process need not the workman and gets into wherein to wash, and is simple reliable high-efficient, and the jam condition is few, can solve traditional filter equipment and block up easily, and traditional manual cleaning fail safe nature is low, and the technical problem with high costs of overhaul
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic front view of a first embodiment of a desulfurization slurry filtration structure in accordance with the present invention;
FIG. 2 is a schematic front view of a second embodiment of a desulfurization slurry filtration structure in accordance with the present invention;
FIG. 3 is a schematic view of a partially enlarged structure of the upper and lower inclined planes according to the present invention;
FIG. 4 is a schematic top view of a desulfurization slurry filtration arrangement according to the present invention;
FIG. 5 is a partially enlarged schematic view of a first embodiment of the joint between the filter screen and the filter cavity according to the present invention;
fig. 6 is a partially enlarged structural schematic view of a second embodiment of the joint of the filter screen and the filter cavity.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
Fig. 1 to 4 show an embodiment of the desulfurization slurry filtering method of the present disclosure, which includes:
at least one strand of desulfurization slurry is injected into the filter cavity 101 of the box body 1 through the injection port 102, the desulfurization slurry is guided to be rolled and turned up by the inner wall of the filter cavity 101, the desulfurization slurry resisting the rolling and turning up is subjected to impact force attenuation by the concave-convex structure 107 on the inner wall of the filter cavity 101, the impurity impact force of the desulfurization slurry is automatically settled, the desulfurization slurry subjected to anti-buffering is obtained and flows upwards to pass through the filter screen 2, the filtration is completed, the outlet 103 is arranged above the filter screen 2, and the filtered desulfurization slurry is discharged from the outlet 103.
Specifically, referring to fig. 4, the number of the desulfurization slurry may be set to 1 strand, 2 strands, 3 strands, 4 strands, and more than 4 strands, the plurality of strands of desulfurization slurry are injected through different injection ports 102 and are rolled up along the inner wall of the filter cavity 101, the plurality of strands of desulfurization slurry may be impacted in a cross manner or in parallel with each other, the dispersion effect is good when the plurality of strands of desulfurization slurry are impacted with each other, the plurality of strands of desulfurization slurry may be advanced in parallel with each other, and impurities are more easily separated therefrom. Further, when there are a plurality of strands of desulfurization slurry, the fluid injected from different injection ports 102 can be set to different flow rates, so that the flow rates of the plurality of strands of desulfurization slurry are in strong and weak contrast to generate a fast flow region and a slow flow, and impurities are promoted to be separated from the desulfurization slurry. The fluid injected from the same injection port can also set the flow rate which changes periodically in an alternating manner, so that the impact force received by the filter screen 2 is changed while impurities are separated, the filter screen 2 is beneficial to generating vibration, and the adhesion of the impurities to the filter screen is reduced.
Specifically, referring to fig. 1 and 4, the manner of constructing the filter chamber 101 is various, such as a square box, a cylindrical box, a tank body, and the like, as long as the filter chamber 101 can be disposed therein, and the shape of the inner wall of the filter chamber 101 can be set. The specific shape of the corresponding filter cavity 101 may also be designed according to the requirement, for example, a square filter cavity, a conical filter cavity, a heart-shaped filter cavity or a cylindrical filter cavity, as long as the injected desulfurization slurry can be guided by the inner wall to rise and roll. The lower part of the box body 1 is provided with a supporting leg 104 for supporting.
Specifically, referring to 1/2 and 3, in order to make the desulfurization slurry in the rolled state, at least the inner wall of filter chamber 101, into which the desulfurization slurry is injected, is configured to have a shape that is advantageous for guiding the fluid to be rolled, and other positions may be configured to have this shape or other shapes without affecting the fluid to be rolled. The shape facilitating the turning of the fluid roll-up comprises: a sloped surface (shown in fig. 1 and 3), a curved surface (shown in fig. 2), a stepped or vertical surface, or the like, or a combination of these shapes. Taking an inclined plane as an example, referring to fig. 1 and 3, the injected fluid firstly goes up along the lower inclined plane 105 and then turns over along the upper inclined plane 106, the smaller the included angle between the upper inclined plane 105 and the lower inclined plane 106 is, the easier the fluid turns over, and the included angle can be set as required, if the space of the filter chamber 101 is too small, the upper inclined plane and the lower inclined plane with smaller included angles can be designed, and if the space of the filter chamber is enough, the included angle between the upper inclined plane and the lower inclined plane can be properly increased, so that the desulfurized slurry has larger rolling and turning space and time, and impurities can be separated more thoroughly. The box body 1 is provided with a convex part 8 for providing an arrangement space of an upper inclined plane and a lower inclined plane; however, if the filter chamber is large enough, it is also possible to provide upper incline 106 and lower incline 105 directly in filter chamber 101 without providing projection 108.
Specifically, referring to fig. 1 and 4, in order to turn the desulfurization slurry upward, the flow rate of the slurry injected into the injection port 102 is also a factor that affects the flow rate, but may be obtained according to debugging as long as it can be ensured that the desulfurization slurry upwells through the filter screen 2 and is discharged from the outlet 103 above the filter screen 2, and the size of the filter cavity 101 and the injection flow rate and flow rate of the desulfurization slurry may also be designed according to the injection flow rate of the absorption tower connected to the injection port 102, so as to ensure the circulation of the desulfurization slurry. The angle of the injected slurry is also one of the factors, and as shown in fig. 4, it is preferably tangential to the inner wall of the filter chamber, but may be at an angle, but should be upward or at least horizontal.
Specifically, referring to fig. 1/2 and 3, the concave-convex structure 107 is designed to block impurities in the desulfurization slurry, particularly large and heavy impurities, and therefore needs to be provided at a position of the inner wall where the injected desulfurization slurry is rolled up, and the concave-convex structure 107 may or may not be provided at other positions. The uneven structure 107 may have various specific shapes, and may resist buffer desulfurization slurry and foreign matter. For example, a plurality of protrusions (a semi-cylindrical shape in fig. 1, a triangular shape in fig. 2, and a triangular prism shape in fig. 3) are uniformly distributed at corresponding positions on the inner wall of the filter cavity 101, so as to form a concave-convex structure 107 on the inner wall of the filter cavity; for example, a plurality of ribs are arranged on the inner wall of the filter cavity 101 to form a concave-convex structure 107 of the inner wall of the filter cavity, and the like.
Specifically, referring to fig. 1/2, a filter screen 2 is fitted to the upper portion of the filter chamber 101, and the desulfurization slurry injected from the injection port 102 passes through the filter screen after filling the filter chamber 101, or a suction device is provided above the filter screen and connected to the outlet 103 to suck the desulfurization slurry to pass through the filter screen 2. The filter screen 2 can be horizontal or slightly inclined, the inclined angle is designed according to the flow requirement and the filtering requirement, the size of the filter cavity is designed, the angle is 1-60 degrees with the horizontal plane, and the filter screen 2 can also be arc-shaped (shown in figure 2). Filter screen 2 can be fixed in filter chamber 101, also can be by spacing activity, and spacing activity is kept the space of filter screen 2 vibration, and when fluid impact filter screen, filter screen 2 can vibrate, reduces the adhesion of debris to the filter screen, but the filter screen is wearing and tearing more easily.
The benefits of this embodiment are: utilize the filter chamber 101 inner wall to cushion and guide the upset of the desulfurization thick liquid epilogue, the epilogue process is overcome gravity and impact force and the potential energy reduces, the desulfurization thick liquid is resisted by the concave-convex structure 107 of filter chamber 101 inner wall simultaneously, the impact force of desulfurization thick liquid reduces, debris in the epilogue upset in-process desulfurization thick liquid is out of potential energy and is subsided, and the desulfurization thick liquid continues to upwelling and accomplishes the filtration through filter screen 2, consequently, effectual desulfurization thick liquid and the impact of debris to filter screen 2 of having reduced, the adhesion of debris to filter screen 2 has been reduced, reduce the maintenance and the jam of filter screen 2, equipment fail safe nature improves, maintenance cost greatly reduced.
An implementation of this embodiment is given below: the thick liquid of absorption tower passes through injection port 102 and gets into filter chamber 101, injection port 102 is towards the inner wall of filter chamber and tilt up, make the desulfurization thick liquid of injection along the inner wall of filter chamber 101 upward roll up the upset, the inner wall of filter chamber 101 is provided with the unsmooth ring of multichannel, unsmooth ring one deck up sets up and forms unsmooth structure 107, the desulfurization thick liquid of upper stroke is blockked by unsmooth structure 107, debris wherein lose the potential more easily and drop and subside to filter chamber 101 bottom, the desulfurization thick liquid continues to upwelling through filter screen 2, 2 levels of filter screen set up, the top of filter screen 2 is provided with export 103, export 103 and desulfurization thick liquid circulating pump intercommunication, through filterable desulfurization thick liquid by the suction circulating pump, and spout the absorption tower once more, form flue gas desulfurization operation circulation.
Further, in another embodiment, referring to fig. 5 and 6, the desulfurization slurry passes through the filter screen 2, and the filter screen 2 is driven to vibrate to reduce the adhesion and clogging of impurities to the filter screen 2.
Specifically, there are various ways to drive the filter screen to vibrate, for example, as shown in fig. 5 and 6, firstly, the filter screen 2 should have a vibration space, for example, the filter screen 2 is limited and clamped by the upper limiting block 801 and the lower limiting block 802, for example, the filter screen 2 is elastically clamped, for example, the filter screen 2 is supported by the elastic member 9, when the desulfurization slurry impacts the filter screen 2, the filter screen 2 can vibrate in the vibration space or within the vibration amplitude, and the driving force can actively drive the filter screen to vibrate by the vibration motor in addition to the impact force of the desulfurization slurry.
In an implementation detail, referring to fig. 5, the inner wall of the box body 1 is provided with an upper limiting block 801 and a lower limiting block 802, the upper limiting block and the lower limiting block are matched to clamp or limit the filter screen 2 in a certain space, so that the purpose of mounting the filter screen is achieved, the filter screen is prevented from being overturned or excessively deflected and vibrated, the shape of the filter screen is matched with that of the filter cavity, the matching degree of the upper limiting block and the lower limiting block is suitable for reducing the matching gap, and the leakage of the slurry to be desulfurized is reduced.
In an implementation detail, in order to reduce the residue of impurities on the filter screen, referring to fig. 6, an elastic member 9 (such as a spring, an elastic sheet, a buffer column, etc.) is arranged between an upper limit block 801 and a lower limit block 802 in the structure shown to elastically support the filter screen 2, in the process that the desulfurization slurry continuously impacts the filter screen 2, the elastic member 9 supports the vibration of the filter screen and provides a vibration space, so that the impurities are difficult to adhere to the filter screen, the injected fluid flow produced by the injection port is changed, the more obvious the vibration of the filter screen is, and the better the effect of shaking off the impurities is.
Further, in another embodiment, referring to fig. 1 and 2, the lower portion of the filter 101 is configured to: has an upwardly and outwardly downwardly sloping surface 105 to direct the slurry upward;
the upper part of the filter chamber 101 is constituted by: has an upward and inward upper ramp 106; the upper inclined plane and the lower inclined plane form a smooth and continuous arc surface (the structure shown in figure 2), or the upper inclined plane and the lower inclined plane are independent and connected, and an included angle is formed between the upper inclined plane and the lower inclined plane (the structure shown in figure 1) so as to guide the upward-rolled desulfurization slurry to turn inwards (the central position of the filter cavity);
the desulfurization slurry injected into the filter chamber 101 enters along the lower slope.
Specifically, referring to fig. 1, 2 and 3, the division of the upper and lower slopes 106 and 105 is for convenience of description only, and does not necessarily form an obvious dividing line. Taking the continuous cambered surface in fig. 2 as an example, the lower part of the cambered surface firstly extends outwards and upwards, and then the upper part of the cambered surface bends and extends inwards, so that the whole cambered surface is continuous, and the desulfurization slurry can smoothly flow upwards and turn over towards the center of the filter cavity; the upper slope 106 and the lower slope 105 may also be connected to form a connecting angle; the upper inclined plane and the lower inclined plane can be planes respectively, can also be cambered surfaces respectively, or the combination of the two. The desulfurization slurry injection opening 102 is tangent to the lower inclined surface 105 or forms an included angle of 0-45 degrees, so that the desulfurization slurry is impacted upwards along the lower inclined surface.
The benefits of this embodiment are: the filter cavity inner wall is constructed into an upper inclined plane and a lower inclined plane, the upper inclined plane and the lower inclined plane can be planes and are connected with each other to form an included angle, and can also be smooth and continuous arc surfaces, the structure can effectively guide injected desulfurization slurry to roll up and turn inwards, so that the desulfurization slurry upwells, heavier impurities fall downwards and settle, particularly, after the impurities are resisted and impacted by the concave-convex structure, the impurities fall more easily, after a large amount of heavier impurities are removed by the upwelled desulfurization slurry, the filter screen can be effectively prevented from being damaged by impact, the desulfurization slurry is resisted by upwelling turning and the concave-convex structure, the impact force is greatly reduced, the impact on the filter screen is obviously reduced, the service life of the filter screen is prolonged, the blocking condition of the filter screen is reduced, the overhauling frequency is reduced, and the cost is reduced.
Fig. 1 to 4 show an embodiment of the desulfurization slurry filtering structure of the present disclosure, which includes:
a filter chamber 101 formed in the case 1, the lower portion of the filter chamber 101 having a lower slope 105 facing upward and outward, and the upper portion having an upper slope 106 facing upward and inward; the upper inclined surface 106 and the lower inclined surface 105 are connected to form a joint surface with an included angle, or the upper inclined surface 106 and the lower inclined surface 105 form a continuous arc surface; the cambered surface is smooth or slightly concave-convex, and the upward rolling of the desulfurization slurry is not influenced.
A concave-convex structure 107 at least formed on the filter cavity upper inclined plane 106;
a filter screen 2 formed on the top of the filter chamber 101;
the desulfurization slurry is input from an injection port 102 at the lower part of the filter cavity, rises along a lower inclined plane 105, overturns along an upper inclined plane 106 and impacts a concave-convex structure 107, so that impurities of the desulfurization slurry lose force and overturns downwards for settlement, and the desulfurization slurry continuously upwelles through the filter cavity 101 to complete filtration.
Specifically, the inner wall of the filter cavity 101 may be partially configured as the lower inclined surface 105 and the upper inclined surface 106, or may be fully configured as the upper inclined surface and the lower inclined surface, when the filter cavity is fully configured as the above structure, the filter cavity forms a shape in which the lower radius is small, the upper radius gradually expands, and then gradually decreases, the gradually decreasing upper portion leaves the outlet 103 for the desulfurization slurry, the filter screen 2 is optimally disposed below the outlet, and the radius of the outlet 103 should be larger than the radius of the slurry injection port 102, so as to ensure that the desulfurization slurry inside the filter cavity 101 can be smoothly discharged. When part of the inner wall is configured as described above, as shown in fig. 1/2 and 4, the filter chamber has an outward bulge 108 to define the above-described lower slope 105 extending upward and outward, and to define the above-described upper slope 106 extending inward and upward.
Specifically, an outlet 103 for the desulfurized slurry is formed at the top of the filter cavity 101, and the filter screen 2 is arranged at the outlet or in the outlet without affecting the filtering. The filter screen 2 may be disposed horizontally or may be disposed obliquely as long as it is not disposed vertically. The mode that sets up like this can guarantee that desulfurization thick liquid from the bottom upwards passes through filter screen 2, and the debris that filters out can drop and deposit because of gravity. The filter screen 2 can be flat (shown in fig. 1) or arc (shown in fig. 2), in order to reduce the adhesion of impurities to the filter screen 2, in a preferred structure, as shown in fig. 2, the lower inclined plane 105, the upper inclined plane 106 and the filter screen 2 form a smooth arc-shaped structure, the desulfurization slurry is rolled towards the filter screen 2 along the lower inclined plane 105 and the upper inclined plane 106, the lower surface of the filter screen 2 can be effectively washed, the adhesion of impurities to the filter screen 2 is reduced, the blockage is reduced, and the number of cleaning operations is reduced.
Specifically, as shown in fig. 1/2 and 3, the uneven structure 107 may have a plurality of specific shapes and may resist the buffer desulfurization slurry and foreign matter. For example, a plurality of protrusions are uniformly distributed on the inclined plane of the filter cavity to form the concave-convex structure 107, and the protrusions are triangular, cylindrical, semi-cylindrical or square; for example, the concave-convex structure 107 is formed by arranging a plurality of ribs on the inner wall of the filter cavity 101. The concave-convex structure 107 is preferably designed to be independently arranged on the upper inclined plane, because the upper inclined plane 106 is a structure inclined towards the center of the filter cavity 101, and the desulfurized slurry can make impurities fall towards the center of the filter cavity 101 by impacting the concave-convex structure on the upper inclined plane, so that the impurities can be conveniently and intensively deposited at the bottom of the filter cavity.
The benefits of this embodiment are: the inner wall of the filter cavity 101 is constructed into an upper inclined surface 106 and a lower inclined surface 105, the upper inclined surface 106 and the lower inclined surface 105 can be planes and are connected with each other to form an included angle, and can also be continuous arc surfaces, the arc surfaces can be smooth or non-smooth, the structure can effectively guide injected desulfurization slurry to roll up and turn inwards, the desulfurization slurry upwells, heavier impurities fall downwards and settle, particularly, after being resisted by the concave-convex structure 107, the impurities fall more easily, after a large amount of heavier impurities are removed by the upwelled desulfurization slurry, the filter screen can be effectively prevented from being damaged by impact, the desulfurization slurry is resisted by the upwelled turning and the concave-convex structure, the impact force is greatly reduced, the impact on the filter screen is obviously reduced, the service life of the filter screen is prolonged, the blocking condition of the filter screen is reduced, the overhauling times are reduced, and the cost is reduced.
One implementation of this embodiment is as follows:
the desulfurization slurry of the absorption tower is introduced from an injection port 102 at the lower part of the filter cavity, the desulfurization slurry is horizontally or obliquely injected on a lower inclined surface 105, the desulfurization slurry upwards rushes along the lower inclined surface 105, an arc surface is formed by the upper inclined surface 105 and the lower inclined surface 106, the desulfurization slurry continuously upwards gushes along the arc surface and turns inwards to impact a concave structure 107 at the position of the upper inclined surface 106, impurities lose force and settle downwards, the desulfurization slurry gradually fills the filter cavity, upwards passes through the filter cavity and is discharged from an outlet, and then is pumped back to the absorption tower by a desulfurization slurry circulating pump to perform spraying operation.
Further, in another embodiment, as shown in fig. 1/2 and 3, the concave-convex structure 107 includes: wave-type structures and step-type structures. Wave type and notch cuttype are the concave-convex structure commonly used, are used for here can give the continuous resistance of desulfurization thick liquid, reduce debris and leak, and such concave-convex structure can effectively strengthen the structural strength of relevant position, avoids rivers to strike the inner wall and destroys.
Specifically, referring to fig. 3, after the relief structure is formed on the upper slope 106, the upper slope forms a concave-convex surface along which the desulfurization slurry is upwelled. In the wave-shaped structure or the step-shaped structure, the height of each wave peak can be the same or different, and the height of each step can be the same or different. Above-mentioned concave-convex structure design simple structure, easy production and processing, structural reliability is high, for example directly installs multichannel steel pipe or rubber tube or billet at last inclined plane, forms the shape that unsmooth is caused, becomes concave-convex structure, steel pipe and rubber tube both ends are sealed in order to prevent the entering of desulfurization thick liquid. The steel or rubber tube may be circular, semi-circular, triangular, square or rectangular, or other polygonal shape.
Further, in another embodiment, as shown in fig. 2 and 3, the wavy structure and the stepped structure are arranged in a stepwise manner to give the desulfurization slurry an increasing resistance. In the structure shown in fig. 2, the convex part is gradually enlarged, and the structure design from step to step can be based on the gradually increased resistance of the desulfurization slurry, so that impurities are gradually intercepted, the desulfurization slurry is gradually excessive, and the damage caused by excessive impact at the first-stage position is avoided.
Specifically, stepwise upward means that the protrusions of the wavy structure and the stepped structure are higher and larger upward, so that the desulfurization slurry is more difficult to directly cross the protrusions upward, thereby giving greater resistance to the desulfurization slurry.
Further, in another embodiment, as shown in fig. 1 and 2, the concave portion of the concave-convex structure 107 is disposed downward or obliquely downward to prevent impurities from being collected in the concave portion. When the desulfurization slurry impacts the concave-convex structure, impurities are easy to gather in the concave part, and the design that the concave part is opened downwards can enable the impurities to automatically fall off due to gravity, so that the impurities are prevented from being deposited in the concave part. Generally, the concave-convex structure is arranged on the lower side of the upper inclined plane, and the lower side of the upper inclined plane is downward, so that the corresponding concave-convex structure is also downward opened, and the deposition of impurities in the concave part is avoided.
Further, in another embodiment, as shown in fig. 3, the concave-convex structure 107 is a multi-layer concave-convex arrangement structure with concave parts in one layer and convex parts in one layer. The structure is convenient to process, has good effect on reinforcing the structure of the inner wall of the filter cavity, and has wide coverage range of the desulfurization slurry.
Further, in another embodiment, as shown in fig. 1, 2 and 4, the upper bevel 106 and the lower bevel 105 are planar or cambered structures;
the desulfurized slurry is injected into filter cavity 101 onto lower incline 105 tangentially to lower incline 105 or at an angle of 0-45 ° to lower incline 105, so that the desulfurized slurry more readily climbs up the incline. Specifically, the injection port 102 of the desulfurization slurry may extend directly to the lower inclined surface, or may not extend to the lower inclined surface, but only face the lower inclined surface, and the desulfurization slurry is injected at a high flow rate under the action of the circulating pump, and is easily impacted on the lower inclined surface.
Further, in another embodiment, an outlet 103 is arranged above the filter cavity, and the desulfurized slurry passing through the filter screen is discharged from the outlet 103; the lower part of the filter cavity 101 forms a sundries deposition part 4 and is provided with a sundries outlet 5 which is provided with a valve body 7;
the spraying unit 3 is arranged above the filter screen 2, and the spraying unit 3 is arranged below the filter screen 2; the upper spraying unit 3 faces and covers the filter screen and is used for spraying and washing the filter screen; the lower spray unit 3 faces and covers the lower portion of the filter chamber 101 to clean the lower portion of the filter chamber 101.
Specifically, be connected with circulating pump and absorption tower for being convenient for, liquid outlet and desulfurization slurry filling opening all are provided with the flange, and the flange is used for with circulating pump and absorption tower quick assembly disassembly. The sundries outlet is provided with a valve body so as to control the discharging of sundries.
Specifically, the spraying unit 3 is generally a spraying pipe or a spraying head, in order to ensure that the spraying unit 3 covers the filter screen and the filter cavity, the spraying pipe or the spraying head is preferably arranged in a plurality of numbers, when the machine is stopped, the spraying unit 3 is started to perform cleaning operation, and sundries falling after spraying are collected downwards at the bottom of the filter cavity and then discharged by a sundry outlet.
Further, as shown in fig. 1 and 2, a sundries collecting tank 6 can be further arranged below the sundries discharging port 5, the sundries collecting tank 6 is matched with a filter screen, a water body is discharged through the filter screen, and sundries are collected in the sundries collecting tank 6 in a centralized manner.
The benefits of this embodiment are: the outlet 103 can be directly communicated to the desulfurization slurry circulating pump, and the desulfurization slurry injection port can be directly communicated to the absorption tower to form a circulating desulfurization slurry filtering system, so that the installation is very convenient and fast. And the design of spraying unit 3 can be when shutting down spray rinsing the filter screen to and wash filter screen below position, make the inner wall of filter screen and filter chamber clean, whole process need not the workman and gets into wherein to wash, and is simple reliable high-efficient, and the jam condition is few, can solve traditional filter equipment and block up easily, and traditional manual cleaning fail safe nature is low, technical problem with high maintenance cost.
One implementation of the present disclosure is as follows:
the absorption tower treat the desulfurization thick liquid and get into the filter chamber from the desulfurization thick liquid filling opening under the effect of desulfurization thick liquid circulating pump, strike the lower inclined plane of filter chamber, along lower inclined plane upwelling, through the relief structure's on inclined plane resistance, the upset is rolled up to the desulfurization thick liquid, debris drop the deposit downwards in the filter chamber bottom, the desulfurization thick liquid upwells through the filter screen, export discharge from the filter screen top gets into the desulfurization thick liquid circulating pump, gets back to the absorption tower again, carries out continuous flue gas desulfurization operation.
When the sundries are accumulated excessively, only the introduction of the desulfurization slurry is stopped, then the spraying unit is started to spray the lower parts of the filter screen and the filter cavity, and the sundries are discharged by opening the sundries outlet.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art.

Claims (10)

1. The desulfurization slurry filtering method is characterized by comprising the following steps:
at least one strand of desulfurization slurry is injected into the filter chamber, the desulfurization slurry is guided to be rolled up and turned over by utilizing the inner wall of the filter chamber, and the rolled desulfurization slurry is resisted by utilizing the concave-convex structure of the inner wall of the filter chamber, so that the impact force of impurities of the desulfurization slurry is weakened to automatically settle, and the obtained desulfurization slurry after resisting and buffering upwells through the filter screen to complete filtration.
2. The method of filtering a desulfurization slurry of claim 1, wherein the desulfurization slurry is passed through the filter screen while the filter screen is driven to vibrate to reduce adhesion and clogging of impurities to the filter screen.
3. The method of filtering a desulfurization slurry of claim 2, wherein the lower portion of the filter chamber is configured to: the lower inclined plane which faces upwards and outwards is used for guiding the desulfurized slurry to roll up;
the upper part of the filter cavity is formed as follows: has an upward and inward upper slope; the upper inclined plane and the lower inclined plane form a smooth and continuous arc surface, or the upper inclined plane and the lower inclined plane are independent and connected so as to guide the upward-rolled desulfurization slurry to turn inwards;
the desulfurization slurry injected into the filter cavity enters along the lower inclined surface.
4. Desulfurization thick liquid filtration, its characterized in that includes:
the lower part of the filter cavity is provided with an upward and outward lower inclined plane, and the upper part of the filter cavity is provided with an upward and inward upper inclined plane; the upper inclined plane and the lower inclined plane are connected with a joint surface, or the upper inclined plane and the lower inclined plane form a continuous cambered surface;
the concave-convex structure is at least formed on the upper inclined plane of the filter cavity;
the filter screen is formed at the top of the filter cavity;
the desulfurization slurry is input from the lower part of the filter cavity, rises along the lower inclined surface, overturns along the upper inclined surface and impacts the concave-convex structure, so that impurities of the desulfurization slurry lose force and are overturned downwards for settlement, and the desulfurization slurry continuously upwelles to pass through the filter cavity to complete filtration.
5. The desulfurization slurry filtration structure of claim 4, wherein said relief structure comprises: wave-type structures and step-type structures.
6. The desulfurization slurry filtration structure of claim 5, wherein said undulating and stepped configurations are arranged in a stepwise manner to impart incremental resistance to the desulfurization slurry.
7. The desulfurization slurry filtering structure according to claim 6, wherein the recesses of said concavo-convex structure are provided downward or obliquely downward to prevent impurities from being accumulated in the recesses.
8. The desulfurization slurry filtration structure of claim 7, wherein said concavo-convex structure is a multi-layer concavo-convex arrangement structure of one layer of concave portions to one layer of convex portions.
9. The desulfurization slurry filtration structure of claim 4, wherein said upper and lower inclined surfaces are planar or cambered;
the desulfurization slurry is injected into the filter cavity in a mode of being tangent to the lower inclined plane or forming an angle of 0-45 degrees with the lower inclined plane and is sprayed on the lower inclined plane.
10. The desulfurization slurry filtering structure according to claim 4, wherein a liquid outlet is provided above the filter chamber, and the desulfurization slurry passing through the filter screen is discharged from the liquid outlet; the lower part of the filter cavity is provided with a sundries outlet;
an upper spraying unit is arranged above the filter screen, and a lower spraying unit is arranged on the lower side of the filter screen; the upper spraying unit faces and covers the filter screen and is used for spraying and washing the filter screen; the lower spraying unit faces and covers the lower part of the filter cavity and is used for cleaning the lower part of the filter cavity.
CN202111224876.0A 2021-10-21 2021-10-21 Desulfurization slurry filtering method and structure Active CN113856320B (en)

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