CN107441777B - Overflow water tank of pre-washing tower - Google Patents
Overflow water tank of pre-washing tower Download PDFInfo
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- CN107441777B CN107441777B CN201710827256.3A CN201710827256A CN107441777B CN 107441777 B CN107441777 B CN 107441777B CN 201710827256 A CN201710827256 A CN 201710827256A CN 107441777 B CN107441777 B CN 107441777B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0031—Degasification of liquids by filtration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0042—Degasification of liquids modifying the liquid flow
- B01D19/0047—Atomizing, spraying, trickling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0042—Degasification of liquids modifying the liquid flow
- B01D19/0052—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- 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
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- 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
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
The invention relates to the technical field of desulfurization, in particular to an overflow water tank of a pre-washing tower, which comprises a tank body, a defoaming paddle and an overflow pipe, wherein a liquid level sensor for detecting the liquid level in the tank body is arranged on the side wall in the tank body, and the defoaming paddle can be arranged in the tank body in a vertically movable mode so as to correspondingly adjust the vertical height of the defoaming paddle according to the liquid level in the tank body detected by the liquid level sensor. The overflow water tank provided by the invention can effectively remove foam in the overflow pipe of the pre-washing tower, greatly reduce cellular accumulation formed by foam discharged to a trench, and prevent flushing water from flowing back into the absorption tower to influence the water balance of the absorption tower.
Description
Technical Field
The invention relates to the technical field of desulfurization, in particular to an overflow water tank of a pre-washing tower.
Background
At present, wet desulfurization technology is mostly adopted in thermal power plants. The desulfurization tower has the phenomenon of foaming at different degrees due to the influence of factors such as boiler combustion conditions, flue gas dust content, limestone slurry quality, process water quality and the like.
In the prior art, a primary desulfurizing tower is added on the basis of the original absorbing tower and is connected with the original tower in series (hereinafter called as a pre-washing tower), but the environmental protection index control value is reduced, and the main desulfurizing reaction occurs in the pre-washing tower, so that the foaming phenomenon of the pre-washing tower is serious, the post-treatment is greatly improved, and the overflow pipe of the pre-washing tower still overflows with black foam. The original overflow pipe directly extends into the trench, and overflowed foam is piled beside the trench in a honeycomb shape after natural drying, so that the foam cannot be naturally eliminated; when the cleaning is carried out, a large amount of water is required to wash the overflow pipe orifice, so that the washed water flows back into the pre-washing tower, and the water balance of the pre-washing tower is affected.
In view of this, the present invention has been made.
Disclosure of Invention
The invention aims to provide an overflow water tank of a pre-washing tower, which is arranged on an overflow pipe and is provided with a defoaming paddle, a grating plate and other structures so as to achieve the aim of completely eliminating overflowed black foam.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a prewash tower overflow water tank, includes box 7, defoaming oar 1, overflow pipe 4, be equipped with the liquid level sensor 3 of detecting the interior liquid level height of box 7 on the inside lateral wall of box 7, the defoaming oar 1 can reciprocate install in box 7 inside to the liquid level height corresponds the upper and lower height of adjustment defoaming oar 1 in the box 7 according to liquid level sensor 3 detects.
In the above scheme, the overflow pipe 4 of the pre-washing tower always discharges black foam outwards, a water tank structure is additionally arranged on the overflow pipe 4, so that the black foam is directly introduced into water, and the foam can be greatly reduced, but when the discharge amount is large, the foam still exists, so that a mechanical device is additionally arranged in the water tank to remove the foam, and the mechanical defoaming is realized by the continuous change of strong vibration or pressure caused by mechanical force, so that the foam is promoted to break so as to achieve the defoaming purpose. In the invention, an improved defoaming paddle 1 is adopted, and foam floating on the liquid surface is removed by stirring.
The invention further provides the following scheme: the defoaming paddle 1 is also provided with a spray head 11 which is communicated with an external water source through a waterway inside the defoaming paddle 1 so as to supplement water into the box body 7 in the rotating process of the defoaming paddle 1.
In the above-mentioned scheme, as the black foam discharged from the overflow pipe 4 increases gradually, an external water source is needed to be provided for supplementing water to dissolve the black foam; when the external water source is used for supplementing water in the box body, the defoaming paddle 1 is driven to rotate through a driving structure, and the driving structure can be a motor.
The invention further provides the following scheme: the overflow water tank is also provided with a backwater water path 8 for connecting the water path inside the defoaming paddle 1 with the bottom of the tank body, the spray head 11 can spray circulating water inside the water tank along the horizontal direction, and when the water tank does not need water replenishment, power is provided for the rotation of the defoaming paddle 1.
In the scheme, the backwater waterway 8 is provided with a water pump, water is extracted from the bottom of the box body, and a certain water pressure is provided for the spray head 11, so that the sprayed water is used as the power for rotating the defoaming paddle 1; and, adjusting the water pressure can increase or decrease the rotation speed of the defoaming paddle 1.
The invention further provides the following scheme: the defoaming paddle 1 comprises a rotary telescopic rod 13 connected with the inner top wall of the box body 7, a plurality of paddles are horizontally extended around by taking the bottom of the rotary telescopic rod 13 as the center, and a spray head 11 capable of spraying water along the horizontal direction is arranged on each paddle, so that the defoaming paddle 1 can move up and down and the paddles can horizontally rotate.
In the above scheme, the telescopic rod 13 can be telescopic in the vertical direction, the rotation of the defoaming paddle 1 can be realized by taking the telescopic rod 13 as a rotation shaft of the paddle, a waterway is arranged in the telescopic rod 13 and is connected with the waterway in the paddle, and the water body provided by an external water source or circulating water is conveyed to the spray head 11.
The invention further provides the following scheme: the defoaming paddle 1 is arranged in parallel with the liquid level in the box body 7 according to the liquid level signal sent by the liquid level sensor 3, and continuously adjusts the position in the vertical direction along with the change of the liquid level, so that the defoaming paddle 1 is always parallel with the liquid level.
In the scheme, the defoaming paddle 1 rotates in the horizontal direction and is connected with the inner top wall of the box body 7 through the rotary telescopic rod 13, so that the defoaming paddle 1 can adjust the height in the vertical direction according to signals provided by the liquid level sensor 3, the rotation plane of the defoaming paddle 1 is slightly higher than the liquid level of the solution in the box body 7, and the foam floating on the liquid level can be scraped by the rotation of the defoaming paddle 1.
The invention further provides the following scheme: the spray head 11 can spray water along the horizontal direction and is arranged on the blade of the defoaming paddle 1, so that the water sprayed by the spray head 11 washes foam floating on the liquid surface.
Among the above-mentioned scheme, be provided with the shower nozzle 11 to the horizontal direction water of spraying on the paddle of defoaming oar 1, different with the common shower nozzle of spraying the water downwards among the prior art, the shower nozzle 11 of this application sets up the side at defoaming oar 1 paddle, can transversely spray the water to the liquid level in the water tank at defoaming oar 1 rotatory in-process. Because the length of the blade of the defoaming paddle 1 is limited to a certain extent, part of foam is accumulated on the inner side wall of the box body which cannot be contacted by the blade in the rotary defoaming process, the spray heads 11 spraying in the horizontal direction can effectively eliminate the attached foam, and if spraying equipment in the vertical direction is adopted, more spray heads are required to be arranged at the top of the box body to achieve the purpose.
The invention further provides the following scheme: the direction of the spray head 11 spraying the water body is opposite to the rotation direction of the defoaming paddle 1.
In the above scheme, the opening of the spray head 11 is arranged on one side of the blade, and is opposite to the rotation direction of the defoaming paddle 1, and in the rotation process of motor drive, along with the improvement of the rotation speed, the sprayed water body receives the effect of centrifugal force, so that the adherent foam can be effectively eliminated.
The invention further provides the following scheme: a plurality of spray heads 11 are arranged along the extending direction of the paddles, and the intervals of the spray heads 11 are gradually lengthened in the extending direction of the paddles; preferably, the water pressure of the spray head 11 is gradually reduced along with the extending direction of the blade.
In the above-mentioned scheme, the closer to the rotation axis the defoaming paddle 1 is in the rotation process, the less mechanical energy brought by the rotation is, therefore there is also easy foam adhesion in the position closer to the rotation axis, therefore when setting up shower nozzle 11, shower nozzle 11 interval is less on the side close to the rotation axis, in order to make more dense rivers break through the foam close to the rotation axis. Preferably, the nozzle 11 may have different opening diameters, and the nozzle 11 near the rotation axis may have a larger opening diameter, or may remove foam densely distributed near the rotation axis.
The invention further provides the following scheme: the blades of the defoaming paddle 1 are provided with grid bars 12 in a shape like a sine curve in the vertical direction, so that the rotating blades scrape foam floating on the liquid surface; preferably, the defoaming paddle 1 is provided with three paddles, and the included angle between every two adjacent paddles in the horizontal direction is 120 degrees.
In the above scheme, the grid bars 12 are continuously arranged in an S shape perpendicular to the rotation direction of the blade, and in the rotation process of the defoaming paddle 1, the grid bars 12 are contacted with the foam and the water body, and the liquid level is fully stirred to enable the floating foam to crack and disappear.
The invention further provides the following scheme: the liquid level sensor 3 is also provided with a conductivity probe for detecting the foam height, so that the rotating speed of the defoaming paddle 1 and the water supplementing quantity of the spray head 11 are improved along with the increase of the foam height.
In the scheme, a conductivity probe is used for measuring the change of the conductivity of the position where the probe end part is positioned, and whether the probe end part is positioned in the foam is reflected; when the foam reaches the height of the end part of the probe, the conductivity probe detects the change of conductivity and simultaneously sends out a foam height signal and a liquid level signal, the rotation speed and the water spraying quantity of the defoaming paddle 1 are controlled, and the vertical position of the defoaming paddle 1 is increased along with the increase of the water quantity and is leveled with the liquid level; after the foam is eliminated, the conductivity probe detects the conductivity value regression, a foam height signal is sent out again, and the vertical position of the defoaming paddle 1 is not adjusted.
The invention further provides the following scheme: the overflow pipe 4 horizontally extends from the bottom of any side wall of the box body 7 to the middle of the box body 7, and the pipe orifice of the overflow pipe 4 is downwards bent, so that discharged foam is fully contacted with a water body.
In the above scheme, the pipe orifice of the overflow pipe 4 extends to the middle part of the water tank instead of being arranged on the side wall, so that foam uniformly enters the water tank, and in addition, the pipe orifice is downwards arranged to prevent water from flowing back to the pre-washing tower through the overflow pipe 4 to a certain extent, so that the balance of water in the tower is unbalanced.
The invention further provides the following scheme: an overflow port 5 connected with the trench is arranged at the upper part of one side wall of the box body 7, so that water bodies absorbing foam after the liquid level rises or part of foam which is not dissolved in water overflows from the overflow port 5 to the trench; the bottom surface of the box body 7 is also provided with a drain outlet 6 which can be controlled to open and close, so that solid impurities deposited in the box body 7 are discharged out of the water tank.
The invention further provides the following scheme: the pipe orifice of the overflow pipe 4 and the overflow port 5 are provided with grid plates 2.
In the above scheme, the grid plate 2 can divide and break larger foam, so that the foam entering the water tank through the overflow pipe 4 and the foam discharged out of the water tank through the overflow port 5 break and dissipate, the dissolution of the water body to the foam is facilitated, and the foam discharged out of the water tank is reduced.
The beneficial effects of the invention are as follows:
1. the invention provides a water tank structure arranged on an overflow pipe of a pre-washing tower, which is used for dissolving overflowed black foam into water so as to avoid honeycomb-shaped accumulation caused by direct discharge into the environment, and in addition, the overflow of washing water to the pre-washing tower can be prevented from influencing the water balance in the tower;
2. the defoaming paddle is used as a main tool for defoaming, and is improved, a spray head capable of spraying water in the horizontal direction is added, so that the water supplementing function is realized, and foam floating in dead angles in the box body is cleaned;
3. the spray heads on the defoaming paddle blades are arranged in unequal intervals, and the spraying direction is opposite to the rotating direction of the paddles, so that foams close to the rotating shaft of the defoaming paddle and foams accumulated on the side wall of the box body can be eliminated better;
4. the invention has grating plates in the overflow pipe and overflow port to further break foam into and out of the box.
Drawings
Fig. 1 is a schematic diagram of an overflow tank according to the present invention.
Fig. 2 is a schematic structural view of the defoaming paddle in the present invention.
The main components in the figure are: 1-defoaming paddle, 11-shower nozzle, 12-grid, 13-rotatory telescopic link, 2-grid, 3-liquid level sensor, 4-overflow pipe, 5-gap, 6-drain, 7-box, 8-return water route.
Detailed Description
In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the embodiments of the invention are further described in detail below with reference to the accompanying drawings.
Example 1
In this embodiment, as shown in fig. 1, an overflow water tank of a pre-washing tower comprises a tank body 7, a defoaming paddle 1 and an overflow pipe 4, wherein a liquid level sensor 3 for detecting the liquid level in the tank body 7 is arranged on the side wall of the inside of the tank body 7, and the defoaming paddle 1 can be installed in the tank body 7 in a vertically movable manner so as to correspondingly adjust the vertical height of the defoaming paddle 1 according to the liquid level in the tank body 7 detected by the liquid level sensor 3.
In this embodiment, the overflow pipe 4 of the pre-washing tower always discharges black foam outwards, and a water tank structure is additionally arranged on the overflow pipe 4, so that the black foam is directly introduced into water, and the foam can be greatly reduced, but when the discharge amount is large, the foam still exists, so that a mechanical device is additionally arranged in the water tank to remove the foam, and the mechanical defoaming is realized by the continuous change of strong vibration or pressure caused by mechanical force, so that the foam is promoted to break so as to achieve the defoaming purpose. In the invention, an improved defoaming paddle 1 is adopted, and foam floating on the liquid surface is removed by stirring; in addition, the defoaming paddle is also provided with a spray head 11 for spraying water, and the water tank is replenished with water while removing foam.
In this embodiment, the defoaming paddle 1 is further provided with a spray head 11, and the spray head is communicated with an external water source through a waterway inside the defoaming paddle 1, so as to supplement water into the box 7 in the rotation process of the defoaming paddle 1. As the black foam discharged from the overflow pipe 4 increases gradually, an external water source is required to be provided for supplementing water to dissolve the black foam; when the external water source is used for supplementing water in the box body, the defoaming paddle 1 is driven to rotate through a driving structure, and the driving structure can be a motor.
In this embodiment, overflow water tank still is equipped with the return water route 8 of connecting defoaming oar 1 inside water route and bottom of the case portion, shower nozzle 11 can be followed the inside circulating water of horizontal direction injection water tank, when the water tank does not need the moisturizing, provides power for the rotation of defoaming oar 1. The backwater waterway 8 is provided with a water pump, water is extracted from the bottom of the box body, and a certain water pressure is provided for the spray head 11, so that the sprayed water is used as the power for rotating the defoaming paddle 1; and, adjusting the water pressure can increase or decrease the rotation speed of the defoaming paddle 1.
In this embodiment, the defoaming paddle 1 includes the rotatory telescopic link 13 that links to each other with the roof in the box 7, and the horizontal extension all around is equipped with a plurality of paddles with rotatory telescopic link 13 bottom as the center, be equipped with on the paddle and follow the shower nozzle 11 of horizontal direction injection water, make defoaming paddle 1 movable from top to bottom and the paddle can horizontal rotation. The telescopic rod 13 can be used for realizing the expansion and contraction in the vertical direction, the rotation of the defoaming paddle 1 can be realized by taking the telescopic rod as a rotation shaft of the paddle, a waterway is arranged inside the telescopic rod 13 and is connected with the waterway inside the paddle, and the water body provided by an external water source or circulating water is conveyed to the spray head 11.
In this embodiment, the defoaming paddle 1 is arranged in parallel with the liquid level in the tank 7 according to the liquid level signal sent by the liquid level sensor 3, and continuously adjusts the position in the vertical direction along with the change of the liquid level, so that the defoaming paddle 1 is always parallel with the liquid level.
In this embodiment, the defoaming paddle 1 rotates in the horizontal direction and is connected with the inner top wall of the box 7 via the rotary telescopic rod 13, so that the defoaming paddle 1 can provide a signal according to the liquid level sensor 3 to adjust the height in the vertical direction, the rotation plane of the defoaming paddle 1 is slightly higher than the liquid level of the solution in the box 7, and the foam floating on the liquid level can be scraped by the rotation of the defoaming paddle 1.
In this embodiment, as shown in fig. 2, the spray head 11 may be disposed on the blade of the defoaming paddle 1 to spray water in a horizontal direction, so that the water sprayed from the spray head 11 washes the foam floating on the liquid surface.
In this embodiment, be provided with the shower nozzle 11 to the horizontal direction water of spraying on the paddle of defoaming oar 1, unlike the shower nozzle of the common downward water of spraying among the prior art, the shower nozzle 11 of this application sets up the side at defoaming oar 1 paddle, can transversely spray the water to the liquid level in the water tank at defoaming oar 1 rotatory in-process. Because the length of the blade of the defoaming paddle 1 is limited to a certain extent, part of foam is accumulated on the inner side wall of the box body which cannot be contacted by the blade in the rotary defoaming process, the spray heads 11 spraying in the horizontal direction can effectively eliminate the attached foam, and if spraying equipment in the vertical direction is adopted, more spray heads are required to be arranged at the top of the box body to achieve the purpose.
In this embodiment, the direction in which the spray head 11 sprays the water body is opposite to the rotation direction of the defoaming paddle 1. The opening of shower nozzle 11 sets up in the one side of paddle, and defoaming oar 1 rotation direction is opposite, and in motor drive's rotation in-process, along with the improvement of rotational speed, the water that sprays out receives the effect of centrifugal force, can effectively eliminate the foam of adherence.
In this embodiment, as shown in fig. 2, a plurality of spray heads 11 are provided along the extending direction of the paddle, and the intervals between the spray heads 11 are gradually lengthened in the extending direction of the paddle.
In this embodiment, the mechanical energy caused by rotation of the defoaming paddle 1 is relatively small at the position closer to the rotation axis during rotation, so that foam is easily adhered at the position closer to the rotation axis, and therefore, when the spray heads 11 are arranged, the spray heads 11 are spaced less at the side closer to the rotation axis, so that denser water flow breaks through the foam near the rotation axis.
In this embodiment, as shown in fig. 2, the blades of the defoaming paddle 1 are provided with grid bars 12 in a shape like a sine curve in the vertical direction, so that the rotating blades scrape the foam floating on the liquid surface; the defoaming paddle 1 is provided with two paddles, and the included angle of the two paddles in the horizontal direction is 180 degrees.
In this embodiment, the grid 12 is continuously S-shaped perpendicular to the rotation direction of the blade, and in the rotation process of the defoaming paddle 1, the grid 12 contacts with the foam and the water body, and fully agitates the liquid surface to break and disappear the floating foam.
In this embodiment, the liquid level sensor 3 is further provided with a conductivity probe for detecting the foam height, so that the rotation speed of the defoaming paddle 1 and the water supplementing amount of the spray head 11 are increased along with the increase of the foam height.
In this embodiment, a conductivity probe is used to measure the change in conductivity of the location where the probe tip is located, reflecting whether the probe tip is in the foam; when the foam reaches the height of the end part of the probe, the conductivity probe detects the change of conductivity and simultaneously sends out a foam height signal and a liquid level signal, the rotation speed and the water spraying quantity of the defoaming paddle 1 are controlled, and the vertical position of the defoaming paddle 1 is increased along with the increase of the water quantity and is leveled with the liquid level; after the foam is eliminated, the conductivity probe detects the conductivity value regression, a foam height signal is sent out again, and the vertical position of the defoaming paddle 1 is not adjusted.
In this embodiment, the overflow pipe 4 extends horizontally from the bottom of any side wall of the tank 7 to the middle of the tank 7, and the pipe orifice of the overflow pipe 4 is bent downwards, so that the discharged foam is fully contacted with the water body. The pipe orifice of the overflow pipe 4 extends to the middle part of the water tank instead of being arranged on the side wall, so that foam uniformly enters the water tank, and in addition, the pipe orifice is downwards arranged to prevent water from flowing back to the pre-washing tower through the overflow pipe 4 to a certain extent, so that the balance of water in the tower is unbalanced.
In this embodiment, an overflow port 5 connected with a trench is provided at the upper part of one side wall of the tank 7, so that water body absorbing foam after the liquid level rises or part of foam which is not dissolved in water overflows from the overflow port 5 to the trench; the bottom surface of the box body 7 is also provided with a drain outlet 6 which can be controlled to open and close, so that solid impurities deposited in the box body 7 are discharged out of the water tank.
In this embodiment, the pipe orifice of the overflow pipe 4 and the overflow port 5 are provided with the grating plate 2. The grid plate 2 can divide and break larger foam, so that the foam entering the water tank through the overflow pipe 4 and the foam discharged out of the water tank through the overflow port 5 break and dissipate, the dissolution of the foam by the water body is facilitated, and the foam discharged out of the water tank is reduced.
Example 2
This embodiment differs from embodiment 1 in that:
in this embodiment, a plurality of spray heads 11 are disposed along the extending direction of the paddle, the intervals between the spray heads 11 are gradually lengthened in the extending direction of the paddle, and the water pressure of the spray heads 11 is gradually reduced along with the extending direction of the paddle.
In this embodiment, the mechanical energy brought by the rotation of the defoaming paddle 1 is relatively smaller at the position closer to the rotation shaft during the rotation, so that foam is easy to adhere at the position closer to the rotation shaft, and therefore, when the spray heads 11 are arranged, the spray heads 11 are spaced less at one side closer to the rotation shaft, so that the denser water flow breaks through the foam close to the rotation shaft; further, by providing the nozzle 11 with different opening diameters, the nozzle 11 near the rotation axis has a larger opening diameter, and foam densely distributed near the rotation axis can be removed.
In this embodiment, the blades of the defoaming paddle 1 are provided with grid bars 12 in a shape like a sine curve in the vertical direction, so that the rotating blades scrape the foam floating on the liquid surface; the defoaming paddle 1 is provided with three paddles, and the included angle between every two adjacent paddles in the horizontal direction is 120 degrees.
In this embodiment, when defoaming oar set up two blades that are level, because the rotation direction is single, can cause one side of blade to pile up the foam, set up the blade into three, can break up the foam more evenly, break up, improved defoaming effect.
The foregoing description is only of the preferred embodiments of the invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (6)
1. The overflow water tank of the pre-washing tower comprises a tank body (7), a defoaming paddle (1) and an overflow pipe (4), and is characterized in that a liquid level sensor (3) for detecting the liquid level height in the tank body (7) is arranged on the side wall in the tank body (7), and the defoaming paddle (1) can be arranged in the tank body (7) in a vertically movable mode so as to correspondingly adjust the upper and lower heights of the defoaming paddle (1) according to the liquid level height in the tank body (7) detected by the liquid level sensor (3);
the defoaming paddle (1) is also provided with a spray head (11), and the spray head is communicated with an external water source through an internal waterway of the defoaming paddle (1) so as to supplement water into the box body (7) in the rotating process of the defoaming paddle (1);
the overflow water tank is also provided with a backwater water path (8) which is used for connecting the water path inside the defoaming paddle (1) with the bottom of the tank body, the spray head (11) can spray circulating water inside the water tank along the horizontal direction, and when the water tank does not need to be supplemented with water, power is provided for the rotation of the defoaming paddle (1);
the defoaming paddle (1) comprises a rotary telescopic rod (13) connected with the inner top wall of the box body (7), a plurality of paddles horizontally extend around the bottom of the rotary telescopic rod (13), and a spray head (11) capable of spraying water along the horizontal direction is arranged on each paddle, so that the defoaming paddle (1) can move up and down and the paddles can horizontally rotate;
a plurality of spray heads (11) are arranged along the extending direction of the paddles, and the intervals of the spray heads (11) are gradually lengthened along the extending direction of the paddles; the water pressure of the spray head (11) is gradually reduced along with the extending direction of the blade, the spray head is provided with different opening calibers, the opening calibers of the spray head close to the rotating shaft are larger, and the direction of spraying water body by the spray head is opposite to the rotating direction of the defoaming paddle.
2. The overflow water tank of the pre-washing tower according to claim 1, wherein the defoaming paddle (1) is arranged in parallel with the liquid level in the tank body (7) according to the liquid level signal sent by the liquid level sensor (3), and the position in the vertical direction is continuously adjusted along with the change of the liquid level, so that the defoaming paddle (1) is always in parallel with the liquid level.
3. The overflow tank of the pre-washing tower according to claim 2, characterized in that the blades of the defoaming paddle (1) are provided with bars (12) in the vertical direction, which are sinusoidal in shape, so that the rotating blades scrape off the foam floating on the liquid surface; the defoaming paddle (1) is provided with three paddles, and the included angle between every two adjacent paddles in the horizontal direction is 120 degrees.
4. A pre-wash tower overflow tank according to claim 3, characterized in that the level sensor (3) is further provided with a conductivity probe for detecting the foam height, whereby the rotational speed of the defoaming paddle (1) and the water replenishment of the spray head (11) are increased with increasing foam height.
5. The overflow water tank of the pre-washing tower according to claim 4, wherein the overflow pipe (4) horizontally extends from the bottom of any side wall of the tank body (7) to the middle part of the tank body (7), and the pipe orifice of the overflow pipe (4) is downwards bent, so that the discharged foam is fully contacted with the water body.
6. The overflow tank of a pre-wash tower according to claim 5, characterized in that the mouth of the overflow pipe (4) is provided with a grating plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710827256.3A CN107441777B (en) | 2017-09-14 | 2017-09-14 | Overflow water tank of pre-washing tower |
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| CN110387717B (en) * | 2018-04-17 | 2023-07-21 | 松下知识产权经营株式会社 | Household appliance device |
| CN110270139B (en) * | 2019-07-10 | 2024-03-26 | 重庆三峰科技有限公司 | Defoaming device for membrane system cleaning box |
| CN116174361A (en) * | 2023-05-04 | 2023-05-30 | 山东世商焊材有限公司 | High-pressure cleaning device convenient for aluminum and aluminum alloy welding wires |
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| CN101700930B (en) * | 2009-10-21 | 2011-05-11 | 宁波市鄞州区绿州能源利用有限公司 | Automatic spraying defoaming device for waste leachate |
| CN203923191U (en) * | 2014-06-13 | 2014-11-05 | 北京都润科技有限公司 | A kind of defoaming device of fermenter |
| CN204293913U (en) * | 2014-11-25 | 2015-04-29 | 中国矿业大学 | A kind of flotation defoaming equipment |
| CN105854774B (en) * | 2016-06-02 | 2020-04-07 | 温州乾含节能科技有限公司 | Pharmacy reation kettle agitator |
| CN205893257U (en) * | 2016-07-31 | 2017-01-18 | 盐城市大明化工机械有限公司 | Seeding tank |
| CN206296081U (en) * | 2016-12-21 | 2017-07-04 | 平顶山华兴浮选工程技术服务有限公司 | A kind of autocontrol ore pulp defoaming device |
| CN107138118A (en) * | 2017-06-22 | 2017-09-08 | 朱耿稳 | A kind of multifunctional steam heating response kettle |
| CN207187196U (en) * | 2017-09-14 | 2018-04-06 | 河北大唐国际张家口热电有限责任公司 | A kind of prewashing tower spill box |
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