CN111905414A - Sodium sulfide production sedimentation system - Google Patents
Sodium sulfide production sedimentation system Download PDFInfo
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- CN111905414A CN111905414A CN202010729065.5A CN202010729065A CN111905414A CN 111905414 A CN111905414 A CN 111905414A CN 202010729065 A CN202010729065 A CN 202010729065A CN 111905414 A CN111905414 A CN 111905414A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0006—Settling tanks provided with means for cleaning and maintenance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/245—Discharge mechanisms for the sediments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/28—Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
- B01D21/283—Settling tanks provided with vibrators
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
- D06N3/0093—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin by applying resin powders; by sintering
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/047—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with fluoropolymers
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
- D06N7/0094—Fibrous material being coated on one surface with at least one layer of an inorganic material and at least one layer of a macromolecular material
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention relates to a sodium sulfide production sedimentation system which comprises a circular sedimentation tank, wherein a vertical first sewage discharge pipeline is arranged in the center of the bottom of the sedimentation tank, an annular vibration type air cushion is arranged at the bottom of the sedimentation tank, and the vibration type air cushion is arranged outside the first sewage discharge pipeline. The sodium sulfide production sedimentation system only needs one person to finish the desilting operation of the alkali mud after settling the crude alkali liquor of sodium sulfide, and the desilting effect is good, and the desilting worker need not to go down to the bottom of the pool of sedimentation tank and carries out the desilting operation, effectively ensures workman's safety, and whole desilting time is no longer than 2 hours, uses manpower and materials sparingly, and the desilting is efficient, and it is effectual to implement.
Description
Technical Field
The invention relates to a sodium sulfide production sedimentation system, and belongs to the technical field of sodium sulfide production.
Background
In the large-scale production process of sodium sulfide (such as 2 ten thousand tons produced in a year), a sedimentation tank is generally adopted to carry out sedimentation clarification on crude sodium sulfide alkaline liquor containing a large amount of alkaline mud, after the crude alkaline liquor enters the sedimentation tank and is clarified for a certain time, the supernatant is an effective component, and the bottom layer is the alkaline mud. After the sedimentation in the sedimentation tank is finished, extracting the supernatant, and then removing the bottom layer impurities to finish the work.
The existing sedimentation basin is generally built by pouring concrete, and the surface of the sedimentation basin is subjected to anticorrosion and waterproof treatment. A sewage discharge channel is arranged in the center of the bottom of the sedimentation tank, a sludge pump is adopted for cleaning, but the amount of alkali mud is too large; for example, in a 50-ton sedimentation tank, the alkali mud exceeds 1 ton, and at present, a worker usually wears a protective clothing on the alkali mud to clean the alkali mud, shovels the alkali mud into a hanging basket at the bottom of the sedimentation tank, and transfers the alkali mud away by using the hanging basket; when the amount of the alkali mud to be cleaned exceeds 80%, workers leave the sedimentation tank, a high-pressure water gun is used for washing the sedimentation tank, sewage containing a large amount of alkali mud is discharged from a sewage discharge channel in the center of the bottom of the sedimentation tank, and a sludge pump or a submersible sewage discharge pump is used for discharging the sewage to a designated area.
The method for cleaning the alkali mud in the settling pond wastes time and labor, the settling pond with 50 tons usually needs four workers to clean for more than 3 hours, and the workers must wear full-protection protective clothing, so that the working environment is severe, and unsafe accidents are easy to happen once the operation is improper.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a sodium sulfide production sedimentation system, which has the following specific technical scheme:
the utility model provides a sodium sulfide production sedimentation system, includes circular sedimentation tank, the bottom of the pool central authorities of sedimentation tank are provided with vertical first sewage pipes, the bottom of the pool department of sedimentation tank is provided with ring form vibrating air cushion, the vibrating air cushion sets up the outside at first sewage pipes.
According to further optimization of the technical scheme, the vibration type air cushion comprises sealing cloth, the projection of the sealing cloth on the bottom of the sedimentation tank is annular, one side of the sealing cloth is hermetically connected with the inner side wall of the sedimentation tank, and the other side of the sealing cloth is hermetically connected with the bottom of the sedimentation tank; an air bag space is defined between the sealing cloth and the inner wall of the sedimentation tank, a plurality of groups of conical spring groups are arranged in the air bag space, and each conical spring group consists of a plurality of conical springs arranged along the radial direction of the sedimentation tank; a permanent magnet sheet is arranged in the air bag space and is arranged at the upper end of the conical spring, the cross section of the permanent magnet sheet is arc-shaped, one side of the permanent magnet sheet is fixedly connected with the sealing cloth, and the other side of the permanent magnet sheet is fixedly connected with the upper end of the conical spring; a plate-shaped electromagnet is arranged below the conical spring and is fixedly connected with the bottom of the sedimentation tank; an annular chamber is arranged below the sedimentation tank, a through hole used for communicating the chamber and the air bag space is further formed in the bottom of the sedimentation tank, and a valve communicated with the chamber is arranged outside the sedimentation tank.
In the further optimization of the technical scheme, the distance between the joint of the sealing cloth and the bottom of the sedimentation tank and the joint of the sealing cloth and the inner wall of the sedimentation tank is x, the maximum value of the cross section length of the sealing cloth is y, y/x is equal to z, and z is more than or equal to 1.022 and less than 1.051.
According to the further optimization of the technical scheme, in the conical spring group, the height of the conical springs arranged along the radial direction of the sedimentation tank is linearly changed in a natural state.
In a further optimization of the above technical solution, the manufacturing method of the sealing cloth includes the steps of:
step one, spraying an aluminum spraying layer with the thickness of 70-80 microns on the surface of glass fiber cloth in the aluminum foil composite glass fiber cloth by utilizing aluminum powder for thermal spraying;
step two, mixing lead powder with the particle size of less than or equal to 35 mu m and polytetrafluoroethylene powder with the particle size of less than or equal to 35 mu m into a first mixture according to the mass ratio of 7:3, and spraying a first mixture layer with the thickness of 200-220 mu m on the surface of the aluminum spraying layer by utilizing the first mixture for thermal spraying at the spraying temperature of 390-395 ℃;
step three, mixing lead powder with the particle size of less than or equal to 35 microns and polytetrafluoroethylene powder with the particle size of less than or equal to 35 microns according to the mass ratio of 1:1 to form a second mixture, and spraying a second mixture layer with the thickness of 310-330 microns on the surface of the first mixture layer by utilizing the second mixture for thermal spraying, wherein the spraying temperature is 390-395 ℃;
step three, mixing lead powder with the particle size of less than or equal to 35 microns and polytetrafluoroethylene powder with the particle size of less than or equal to 35 microns according to the mass ratio of 3:7 to form a third mixture, and spraying a third mixture layer with the thickness of 430-470 microns on the surface of the second mixture layer by utilizing the third mixture for thermal spraying, wherein the spraying temperature is 390-395 ℃;
step four, mixing lead powder with the particle size of less than or equal to 35 microns and polytetrafluoroethylene powder with the particle size of less than or equal to 35 microns according to the mass ratio of 1:9 to form a fourth mixture, and performing thermal spraying on the surface of the third mixture layer by using the fourth mixture to spray a fourth mixture layer with the thickness of 560-;
and fifthly, performing electrostatic spraying on polytetrafluoroethylene powder with the particle size of less than or equal to 35 mu m to spray a polytetrafluoroethylene coating with the thickness of more than 1mm on the surface of the fourth mixed layer, sintering the aluminum foil composite glass fiber cloth with the polytetrafluoroethylene coating at the temperature of 375-380 ℃, and cooling to obtain the sealing cloth.
According to the further optimization of the technical scheme, the sedimentation tank is formed by pouring concrete into the tank body, and the inner wall of the tank body is coated with the protective layer made of epoxy resin floor paint.
According to the further optimization of the technical scheme, a first connecting ring is arranged between the sealing cloth and the inner side wall of the sedimentation tank, the first connecting ring comprises a vertical cylindrical first ring body matched with the inner side wall of the sedimentation tank, the first ring body is in sealing connection with the inner side wall of the sedimentation tank through metal glue, an inner edge is arranged at the upper end of the first ring body, the tail end of the inner edge is connected with the upper end of the first ring body into a whole, the height of the head end of the inner edge is lower than that of the tail end of the inner edge, and the sealing cloth is in sealing connection with the inner edge through the metal glue; be provided with the second clamping ring between the bottom of pool of sealed cloth and sedimentation tank, the second clamping ring is including the ring form gasket, metal glue sealing connection is adopted with the bottom of pool of sedimentation tank to the gasket, the outer edge of gasket is provided with the turn-ups that upwards turns up, turn-ups lower extreme is as an organic whole with the outer edge of gasket connection, contained angle between turn-ups and the gasket is the acute angle, adopt metal glue sealing connection between sealed cloth and the turn-ups.
According to the further optimization of the technical scheme, a second sewage discharge pipeline communicated with the first sewage discharge pipeline is arranged below the bottom of the sedimentation tank, and a sewage discharge valve is installed at the tail end of the second sewage discharge pipeline.
According to the further optimization of the technical scheme, the vibrating spear is arranged inside the first sewage discharge pipeline, and the outer diameter of the rod body of the vibrating spear is smaller than the inner diameter of the first sewage discharge pipeline.
The invention has the beneficial effects that:
the sodium sulfide production sedimentation system only needs one person to finish the desilting operation of the alkali mud after settling the crude alkali liquor of sodium sulfide, and the desilting effect is good, and the desilting worker need not to go down to the bottom of the pool of sedimentation tank and carries out the desilting operation, effectively ensures workman's safety, and whole desilting time is no longer than 2 hours, uses manpower and materials sparingly, and the desilting is efficient, and it is effectual to implement.
Drawings
FIG. 1 is a schematic internal view of a sodium sulfide production settling system according to the present invention;
FIG. 2 is a schematic structural view (in a plan view) of the sodium sulfide production settling system of the present invention;
FIG. 3 is a schematic view of the construction of the vibrating air mattress of the present invention;
FIG. 4 is a diagram of a motion model of the sealing cloth according to the present invention;
FIG. 5 is a mathematical model diagram of the sealing cloth of the present invention;
FIG. 6 is a schematic connection diagram of the first connection ring, the second connection ring and the sedimentation basin according to the present invention;
FIG. 7 is an enlarged view of a portion A of FIG. 6;
FIG. 8 is an enlarged view of a portion of FIG. 6 at B;
FIG. 9 is a crease graph of the folding test in example 6;
FIG. 10 is a crease graph of the folding test in example 7;
FIG. 11 is a crease graph of the folding test in example 8;
FIG. 12 is a schematic view of the two ends of a fixing cloth;
fig. 13 is a schematic view of the connection between the fixing cloth and the fixing plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1 and 2, the sodium sulfide production settling system includes a circular settling basin 10, a vertical first sewage pipe 11 is disposed in the center of the bottom of the settling basin 10, a circular vibration type air cushion 20 is disposed at the bottom of the settling basin 10, and the vibration type air cushion 20 is disposed outside the first sewage pipe 11.
The sedimentation tank 10 is formed by pouring concrete into a tank body, and the inner wall of the tank body is coated with a protective layer made of epoxy resin floor paint. The epoxy resin floor paint has the characteristics of wear resistance, corrosion resistance, oil stain resistance, heavy pressure resistance and smooth surface.
Example 2
Based on embodiment 1, as shown in fig. 1 and 3, the vibrating air cushion 20 includes a sealing cloth 21, a projection of the sealing cloth 21 on the bottom of the sedimentation tank 10 is a circular ring, one side of the sealing cloth 21 is hermetically connected with the inner side wall of the sedimentation tank 10, and the other side of the sealing cloth 21 is hermetically connected with the bottom of the sedimentation tank 10; an air bag space 22 is defined between the sealing cloth 21 and the inner wall of the sedimentation basin 10, a plurality of groups of conical spring groups are arranged in the air bag space 22, and each conical spring group consists of a plurality of conical springs 25 which are arranged along the radial direction of the sedimentation basin 10; a permanent magnet sheet 24 arranged at the upper end of a conical spring 25 is further arranged in the air bag space 22, the cross section of the permanent magnet sheet 24 is arc-shaped, one side of the permanent magnet sheet 24 is fixedly connected with the sealing cloth 21, and the other side of the permanent magnet sheet 24 is fixedly connected with the upper end of the conical spring 25; a plate-shaped electromagnet 23 is arranged below the conical spring 25, and the electromagnet 23 is fixedly connected with the bottom of the sedimentation basin 10; an annular chamber 26 is arranged below the sedimentation basin 10, a through hole 15 for communicating the chamber 26 with the air bag space 22 is further arranged at the bottom of the sedimentation basin 10, and a valve 27 communicated with the chamber 26 is arranged outside the sedimentation basin 10.
Further, a second sewage discharge pipeline 12 communicated with the first sewage discharge pipeline 11 is arranged below the bottom of the sedimentation basin 10, and a sewage discharge valve 13 is installed at the tail end of the second sewage discharge pipeline 12.
Further, the internally mounted of first blowdown pipeline 11 has vibrating spear 40, the barred body of vibrating spear 40 is located the inside of first blowdown pipeline 11, and the inside of the metal box of settling basin 10 below is installed to the remaining part of vibrating spear 40, the external diameter of the barred body of vibrating spear 40 is less than the internal diameter of first blowdown pipeline 11. The vibrating rod 40 may be a vibrating rod used in the concrete field, for example, a concrete high frequency vibrating rod of fudike technologies ltd.
A sludge pump is also connected with the blow-down valve 13. The specific use method of the sodium sulfide production sedimentation system comprises the following steps: the crude sodium sulfide lye is conveyed to the interior of the sedimentation basin 10 for sedimentation, after the sedimentation is finished, the supernatant in the interior of the sedimentation basin 10 is pumped away, and the residual alkali mud and the residual alkali lye are accompanied by the residual alkali lye in the interior of the sedimentation basin 10.
When the cleaning operation is required, clear water is firstly poured into the sedimentation tank 10, the amount of the poured clear water exceeds more than half of the volume of the sedimentation tank 10, then the vibrating rod 40 is started, the alkali mud deposited on the part of the vibrating rod 40 is vibrated and stirred, the blow-off valve 13 and the sludge pump are opened, the first blow-off pipeline 11 is dredged under the high-frequency vibration of the vibrating rod 40, and the alkali mud mixed water is conveyed to a designated area through the first blow-off pipeline 11, the second blow-off pipeline 12 and the blow-off valve 13 in sequence.
When the alkaline sludge in the sedimentation basin 10 is cleaned by more than 90%, most of the alkaline sludge is attached to the bottom of the sedimentation basin 10, i.e. to the surface of the vibrating air cushions 20. At this time, an air compressor is externally connected through a valve 27, compressed air is injected into the cavity 26, the through hole 15 and the air bag space 22 until the air pressure in the air bag space 22 is 1.11 to 1.13 atmospheric pressures, the electromagnet 23 is electrified to generate magnetic force which is repulsive to the permanent magnet sheet 24, and therefore the sealing cloth 21 is jacked up; because the cross section of the electromagnet 23 is arc-shaped, and the sealing cloth 21 is further tightened by injecting compressed air, the sealing cloth 21 forms an arc-shaped surface protruding outwards finally, as shown in fig. 3; the valve 27 is closed. Then, the interior of the sedimentation basin 10 is flushed by a high-pressure water gun, in the flushing process, the electromagnet 23 is powered off, and the sealing cloth 21 which protrudes outwards is pressed into a sealing surface which is concave downwards under the action of the pressure of water above the sealing cloth 21, as shown by dotted lines in fig. 4; then the electromagnet 23 is electrified, and the sealing cloth 21 can be bounced from bottom to top and is straightened; then the electromagnet 23 is powered off, and the sealing cloth 21 is pressed from top to bottom in a concave manner; thus, as the electromagnet 23 is intermittently energized (for example, 2 to 5 seconds, 2 to 3 seconds, 2 to 5 seconds, and then 2 to 3 seconds …), the sealing cloth 21 will continuously shake up and down, and during this process, the alkaline sludge attached to the surface of the sealing cloth 21 will be continuously washed away and will flow away along with the water flowing to the first drainage pipe 11.
Finally, even if dry alkaline mud is attached to the surface of the sealing cloth 21, the surface of the sealing cloth 21 can be cleaned up by matching with a high-pressure water gun to wash in the process of shaking the sealing cloth 21 up and down. And the alkaline mud in the rest area of the sedimentation basin 10 can be washed by water flow or a high-pressure water gun. When the surface of sealed cloth 21 by the sanitization, just also accomplish the desilting operation to the sedimentation tank 10 inside, the desilting is effectual, only needs can accomplish the desilting operation alone, and the desilting workman need not to go down to the bottom of the pool of sedimentation tank 10 and carries out the desilting operation, and whole desilting time is no longer than 2 hours, the material resources of using manpower sparingly, and the desilting is efficient, and the desilting is effectual.
When the water pressure above the sealing cloth 21 is not high enough, the electromagnet 23 is electrified to generate magnetic force which is attracted with the permanent magnet sheet 24, so that the permanent magnet sheet 24 moves downwards, and the sealing cloth 21 is ensured to be in a continuous shaking process.
The conical spring 25 has a buffering effect, and the contact area between the upper end of the conical spring 25 and the sealing cloth 21 is small, so that the sealing cloth 21 can form an arc-shaped structure to the maximum extent after being tightened upwards. When the interior of the sedimentation basin 10 is filled with the sodium sulfide crude alkali liquor, the conical spring 25 is compressed to the limit, and the conical spring 25 in the state mainly plays a role in supporting the sealing cloth 21 and preventing the sealing cloth 21 from being collapsed. The structure of the conical spring 25 with large top and small bottom can leave enough space for the sealing cloth 21 to shake up and down.
In the subsequent cleaning process, no matter the water pressure or the electromagnetic attraction causes the conical spring 25 to be compressed, the conical spring 25 does not need to be compressed to the limit; the reason is that during the washing process, the water pressure is not sufficient to compress the conical spring 25 to the limit; the conical spring 25 is compressed to the limit by adopting the electromagnetic attraction, so that a large amount of electric energy is consumed and cannot be paid; therefore, the conical spring 25 does not need to be compressed to the limit.
Before the crude sodium sulfide lye is conveyed to the sedimentation tank 10, the valve 27 is opened to make the air pressure inside the air bag space 22 be normal pressure, when the sedimentation tank 10 is filled with the crude sodium sulfide lye, the air pressure inside the air bag space 22 is also normal pressure, and then the valve 27 is closed.
Example 3
As shown in fig. 4, the distance between the joint of the sealing cloth 21 and the bottom of the sedimentation basin 10 and the joint of the sealing cloth 21 and the inner side wall of the sedimentation basin 10 is x, where x is the length of the dotted line in fig. 4; as shown in fig. 5, the maximum value of the cross-sectional length of the sealing cloth 21 is y, and z is y/x, and 1.022 ≦ z < 1.051.
In fig. 4, the dotted line corresponds to a limit state that the seal cloth 21 can be depressed, which is an arc in a mathematical model, and in actual operation, the seal cloth 21 is not depressed to reach the limit state, so z ≠ 1.051. y cannot be too large, otherwise the sealing cloth 21 cannot be tightened, the cambered surface structure cannot be achieved when the sealing cloth is tightened upwards, and a plurality of fold structures exist on the surface even if the sealing cloth is subsequently supported. y cannot be too small, otherwise, even if the sealing cloth 21 can be tightened, the undulation degree of the sealing cloth 21 is not enough, which is not favorable for the smooth flowing down of the alkali mud on the surface of the sealing cloth 21 along the surface of the sealing cloth 21. In this range z, the cross section of the seal cloth 21 tends to be a curved surface structure after being tightened upward.
Example 4
In the case of the conical spring group according to example 2, the height of the conical springs 25 arranged in the radial direction of the sedimentation basin 10 in the natural state changes linearly. Although in fig. 4, the cross section of the upwardly-tightened sealing cloth 21 is arc-shaped, if the height change of the conical spring 25 in the natural state is designed according to the change of the arc surface, the design is very complicated, and after many times of practice and parameter optimization, the linear change of the height of the conical spring 25 in the natural state is found to satisfy the support property when the conical spring 25 is compressed to the limit; the reason is that when the conical spring 25 is compressed to the limit, the sealing cloth 21 is also tightened to the limit, and the sealing cloth 21 can balance the adjacent conical spring 25, so that the conical spring 25 can normally exert the bearing function.
Example 5
The quantity that electro-magnet 23 set up and conical spring group one-to-one, it is mutually opposite between the electro-magnet 23 to link to each other, adopts the mode operation of staggering, and first electro-magnet 23 circular telegram promptly, and second electro-magnet 23 cuts off the power supply, so, sealed cloth 21 finally can form "raised grain" structure at the in-process of "shake", and this can further improve "shake" effect to can be faster give the clearance with sealed cloth 21 surperficial alkali mud, the clearance time can further shorten.
Example 6
The manufacturing method of the sealing cloth 21 comprises the following steps:
step one, spraying an aluminum spraying layer with the thickness of 70-80 microns on the surface of glass fiber cloth in the aluminum foil composite glass fiber cloth by utilizing aluminum powder for thermal spraying; the thermal spraying process of aluminum powder is a mature technology and is not described in detail herein.
Step two, mixing lead powder with the particle size of less than or equal to 35 mu m and polytetrafluoroethylene powder with the particle size of less than or equal to 35 mu m into a first mixture according to the mass ratio of 7:3, and spraying a first mixture layer with the thickness of 200-220 mu m on the surface of the aluminum spraying layer by utilizing the first mixture for thermal spraying at the spraying temperature of 390-395 ℃;
step three, mixing lead powder with the particle size of less than or equal to 35 microns and polytetrafluoroethylene powder with the particle size of less than or equal to 35 microns according to the mass ratio of 1:1 to form a second mixture, and spraying a second mixture layer with the thickness of 310-330 microns on the surface of the first mixture layer by utilizing the second mixture for thermal spraying, wherein the spraying temperature is 390-395 ℃;
step three, mixing lead powder with the particle size of less than or equal to 35 microns and polytetrafluoroethylene powder with the particle size of less than or equal to 35 microns according to the mass ratio of 3:7 to form a third mixture, and spraying a third mixture layer with the thickness of 430-470 microns on the surface of the second mixture layer by utilizing the third mixture for thermal spraying, wherein the spraying temperature is 390-395 ℃;
step four, mixing lead powder with the particle size of less than or equal to 35 microns and polytetrafluoroethylene powder with the particle size of less than or equal to 35 microns according to the mass ratio of 1:9 to form a fourth mixture, and performing thermal spraying on the surface of the third mixture layer by using the fourth mixture to spray a fourth mixture layer with the thickness of 560-;
and step five, performing electrostatic spraying on polytetrafluoroethylene powder with the particle size of less than or equal to 35 microns to spray a polytetrafluoroethylene coating with the thickness of more than 1mm on the surface of the fourth mixed layer, sintering the aluminum foil composite glass fiber cloth with the polytetrafluoroethylene coating at the temperature of 375-380 ℃, and cooling to obtain the sealing cloth 21.
Wherein the melting point of the polytetrafluoroethylene is 327 ℃ and the boiling point is 400 ℃; the melting point of the metal lead is 328 ℃, so that the lead powder and the polytetrafluoroethylene powder can be mixed and sprayed by adopting a thermal spraying process, and the spraying temperature is controlled to be 390-; the sintering temperature of the polytetrafluoroethylene is controlled at 375-380 ℃, and after sintering, the first mixed layer, the second mixed layer, the third mixed layer, the fourth mixed layer and the polytetrafluoroethylene coating can be sintered into a whole, so that tight combination is ensured. The function of mixing metal lead is to enable the metal lead to be tightly combined with the aluminum spraying layer, and the surface of the glass fiber cloth cover in the aluminum foil composite glass fiber cloth is rough and can be tightly combined with the aluminum spraying layer; from inside to outside, the content (mass ratio) of the metal lead is reduced from 70% to 50%, 30%, 10% and 0% in sequence, and the first mixed layer with the highest lead content is tightly combined with the aluminum spraying layer; and then, sequentially increasing the content of the polytetrafluoroethylene powder from 30% to 50%, 70%, 90% and 100%, and solving the technical defect that the polytetrafluoroethylene is not easily combined with other materials by sequentially increasing the content of the polytetrafluoroethylene.
The seal cloth 21 was subjected to a folding test:
step S1, folding the sealing cloth 21 in half by using a folding machine, and rolling the crease by using a press roller, wherein the pressure during rolling is 10 bar;
step S2, flattening the folded sealing cloth 21, folding the sealing cloth 21 along the crease of the sealing cloth 21 again, and rolling the crease by adopting a press roller, wherein the pressure during rolling is 10 bar;
and step S3, repeating the step S2 for a plurality of times, and recording the folding times.
After 100 folds of the finished sealing cloth 21, the folds are shown in fig. 9. After the finished sealing cloth 21 is folded for 1000 times, a water seepage test is carried out, and no water seepage phenomenon is found.
Example 7
The manufacturing method of the contrast cloth X comprises the following steps:
step one, spraying an aluminum spraying layer with the thickness of 70-80 microns on the surface of glass fiber cloth in the aluminum foil composite glass fiber cloth by utilizing aluminum powder for thermal spraying; the thermal spraying process of aluminum powder is a mature technology and is not described in detail herein.
Step two, mixing lead powder with the particle size of less than or equal to 35 mu m and polytetrafluoroethylene powder with the particle size of less than or equal to 35 mu m according to the mass ratio of 1:1 to form a second mixture, and spraying a mixed layer P with the thickness of 1500-1620 mu m on the surface of the aluminum spraying layer by utilizing the second mixture for thermal spraying at the spraying temperature of 390-395 ℃;
and step three, carrying out electrostatic spraying on polytetrafluoroethylene powder with the particle size of less than or equal to 35 mu m to spray a polytetrafluoroethylene coating with the thickness of 1mm on the surface of the mixing layer P, sintering the aluminum foil composite glass fiber cloth with the polytetrafluoroethylene coating at 380 ℃ of 375-.
Among them, the thickness of the polytetrafluoroethylene coating layer in example 6 is preferably 1mm, as compared with this example.
Folding test was performed with control cloth X:
step S1, folding the contrast cloth X in half by using a folding machine, and rolling at the crease by using a press roller, wherein the pressure during rolling is 10 bar;
step S2, flattening the folded contrast cloth X, folding the contrast cloth X again along the crease of the contrast cloth X, and rolling the crease by adopting a press roller at the pressure of 10 bar;
and step S3, repeating the step S2 for a plurality of times, and recording the folding times.
After 100 folds of the contrast cloth X, the fold is as shown in fig. 10; and (5) carrying out a water permeability test to find that no water permeability phenomenon exists.
Example 8
The method for manufacturing the control cloth Y is as follows:
and (3) performing electrostatic spraying on polytetrafluoroethylene powder with the particle size of less than or equal to 35 mu m to spray a polytetrafluoroethylene coating with the thickness of 2.6-2.7mm on the surface of the glass fiber cloth in the aluminum foil composite glass fiber cloth, sintering the aluminum foil composite glass fiber cloth with the polytetrafluoroethylene coating at the temperature of 375-380 ℃, and cooling to obtain the contrast cloth Y.
Among them, the thickness of the polytetrafluoroethylene coating layer in example 6 is preferably 1mm, as compared with this example.
Folding test was performed with control cloth Y:
step S1, folding the contrast cloth Y in half by using a folding machine, and rolling the crease by using a press roller, wherein the pressure during rolling is 10 bar;
step S2, flattening the folded contrast cloth Y, folding the contrast cloth Y again along the crease of the contrast cloth Y, and rolling the crease by adopting a press roller, wherein the pressure during rolling is 10 bar;
and step S3, repeating the step S2 for a plurality of times, and recording the folding times.
After the comparison cloth Y is folded for 65 times, the folding mark is shown in figure 11; and (5) carrying out a water seepage test to find that a water seepage phenomenon occurs.
By analyzing examples 6 to 8, it can be seen that:
firstly, if pure polytetrafluoroethylene is adopted to carry out spraying on the folded glass fiber cloth, even if sintering treatment is adopted subsequently, the combination effect between the polytetrafluoroethylene and the glass fiber cloth is effective, after multiple times of folding and rolling, obvious damage appears at the crease, even the water seepage phenomenon appears at the crease, which fully explains the poor combination force between the polytetrafluoroethylene and the glass fiber cloth.
Secondly, if the priming is carried out by spraying pure aluminum firstly, then the lead powder and the polytetrafluoroethylene powder are mixed according to the mass ratio of 1:1 for thermal spraying to prepare an intermediate layer, and finally the polytetrafluoroethylene coating is sprayed, although the binding force between the polytetrafluoroethylene and other materials can be improved, the improvement effect is limited; as can be seen from the analysis of fig. 10 and 11: the creases in FIG. 10 are worn less, and no significant water seepage is observed through the water seepage test; however, as can be seen from comparison of fig. 9, the seal cloth 21 manufactured by the manufacturing process of the present invention has no obvious damage at the fold even after being folded and rolled many times, and the remaining trace is shallow, and there is no water seepage at the fold, which fully indicates that the bonding force between the polytetrafluoroethylene and the glass fiber cloth is excellent.
Example 9
As shown in fig. 6-8, a first connecting ring 51 is disposed between the sealing cloth 21 and the inner side wall of the sedimentation tank 10, the cross-sectional structure of the first connecting ring 51 is an acute angle structure, the first connecting ring 51 includes a vertical cylindrical first ring body 511 matched with the inner side wall of the sedimentation tank 10, the first ring body 511 and the inner side wall of the sedimentation tank 10 are hermetically connected by using metal glue, an inner edge 512 is disposed at the upper end of the first ring body 511, the tail end of the inner edge 512 is integrally connected with the upper end of the first ring body 511, the height of the head end of the inner edge 512 is lower than that of the tail end of the inner edge 512, and the sealing cloth 21 and the inner edge 512 are hermetically connected by using metal glue; be provided with second clamping ring 52 between the bottom of pool of sealed cloth 21 and sedimentation tank 10, second clamping ring 52 includes ring form gasket 521, gasket 521 adopts metal glue sealing connection with the bottom of pool of sedimentation tank 10, the outer edge of gasket 521 is provided with the turn-ups 522 that upwards turns up, the lower extreme of turn-ups 522 is connected as an organic whole with the outer edge of gasket 521, the contained angle between turn-ups 522 and the gasket 521 is the acute angle, adopt metal glue sealing connection between sealed cloth 21 and the turn-ups 522.
The gasket 521 is fixedly connected with the bottom of the sedimentation tank 10 by installing expansion screws, and then is sealed and reconnected by using metal glue. Similarly, the first ring 511 is fixedly connected with the inner side wall of the sedimentation basin 10 by installing expansion screws, and then is sealed and reconnected by using metal glue.
In the embodiment, the first connecting ring 51 and the second connecting ring 52 are arranged, so that subsequent replacement and maintenance are facilitated.
Example 10
In embodiment 9, the connection manner of the seal cloth 21 to the first and second coupling rings 51 and 52 is further optimized. The sealing cloth 21 without the teflon coating at both ends of the sealing cloth 21 is called as a fixed cloth 1, and the method for making the sealing cloth 21 without the teflon coating at both ends can be made by leaving white on both ends of the aluminum foil composite glass fiber cloth in advance, or by polishing both ends of the sealing cloth 21 with a grinding wheel to remove the teflon coating.
Cutting a plurality of gaps with the length of 50-100cm from the two ends of the fixed cloth 1 to form a plurality of cloth strips 2, as shown in figure 12; coating metal glue on two ends of the fixed cloth 1, arranging a plurality of cloth penetrating holes 31 for allowing the cloth strips 2 to penetrate through on the surface of the fixed plate 3, wherein the cloth penetrating holes 31 can be set to be half of the number of the cloth strips 2 according to requirements, enabling half of the cloth strips 2 to penetrate through the cloth penetrating holes 31 for folding, arranging pressing plates 5 above and below the fixed cloth 1, and coating the metal glue between the pressing plates 5 and the fixed plate 3, as shown in fig. 13; wherein the fixing plate 3 is the inner edge 512 or the turned-over edge 522. With this fixing, the connection between the sealing cloth 21 and the first and second coupling rings 51 and 52 becomes more stable.
In the above embodiment, the main body of the sealing cloth 21 is aluminum foil composite glass fiber cloth, which has high longitudinal and transverse tensile strength (over 2000MPa), and can be used for bearing the sodium sulfide crude alkali solution above. When the air bag is installed, the aluminum foil surface is positioned inside the air bag space 22, and the polytetrafluoroethylene coating is positioned outside the air bag space 22; the polytetrafluoroethylene has excellent heat resistance and cold resistance, has the characteristics of acid resistance, alkali resistance and various organic solvents resistance, is almost insoluble in all solvents, and has an extremely low friction coefficient, so that a large amount of alkali mud is not easy to adhere to the outer surface layer of the sealing cloth 21. The teflon and the aluminum foil have excellent sealability, so that the sealing cloth 21 has excellent waterproof performance. The roughness of the surface of the glass fiber cloth of the aluminum foil composite glass fiber cloth is large, and the aluminum foil composite glass fiber cloth is easy to be combined with a subsequent coating.
In all the above embodiments, the aluminum foil composite glass fiber cloth with the polytetrafluoroethylene coating is sintered at 375-380 ℃, and nitrogen is used as a shielding gas during sintering.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a sodium sulfide production sedimentation system, includes circular settling basin, its characterized in that: the sedimentation basin is characterized in that a vertical first sewage discharge pipeline is arranged in the center of the bottom of the sedimentation basin, a circular vibration type air cushion is arranged at the bottom of the sedimentation basin, and the vibration type air cushion is arranged outside the first sewage discharge pipeline.
2. The sodium sulfide production settling system of claim 1, wherein: the vibrating air cushion comprises sealing cloth, the projection of the sealing cloth on the bottom of the sedimentation tank is annular, one side of the sealing cloth is hermetically connected with the inner side wall of the sedimentation tank, and the other side of the sealing cloth is hermetically connected with the bottom of the sedimentation tank; an air bag space is defined between the sealing cloth and the inner wall of the sedimentation tank, a plurality of groups of conical spring groups are arranged in the air bag space, and each conical spring group consists of a plurality of conical springs arranged along the radial direction of the sedimentation tank; a permanent magnet sheet is arranged in the air bag space and is arranged at the upper end of the conical spring, the cross section of the permanent magnet sheet is arc-shaped, one side of the permanent magnet sheet is fixedly connected with the sealing cloth, and the other side of the permanent magnet sheet is fixedly connected with the upper end of the conical spring; a plate-shaped electromagnet is arranged below the conical spring and is fixedly connected with the bottom of the sedimentation tank; an annular chamber is arranged below the sedimentation tank, a through hole used for communicating the chamber and the air bag space is further formed in the bottom of the sedimentation tank, and a valve communicated with the chamber is arranged outside the sedimentation tank.
3. The sodium sulfide production settling system of claim 2, wherein: the distance between the joint of the sealing cloth and the bottom of the sedimentation tank and the joint of the sealing cloth and the inner wall of the sedimentation tank is x, the maximum value of the cross section length of the sealing cloth is y, y/x is equal to z, and z is more than or equal to 1.022 and less than 1.051.
4. The sodium sulfide production settling system of claim 2, wherein: in the conical spring group, the height of the conical springs arranged along the radial direction of the sedimentation basin is linearly changed in a natural state.
5. The sodium sulfide production settling system of claim 2, wherein: the manufacturing method of the sealing cloth comprises the following steps:
step one, spraying an aluminum spraying layer with the thickness of 70-80 microns on the surface of glass fiber cloth in the aluminum foil composite glass fiber cloth by utilizing aluminum powder for thermal spraying;
step two, mixing lead powder with the particle size of less than or equal to 35 mu m and polytetrafluoroethylene powder with the particle size of less than or equal to 35 mu m into a first mixture according to the mass ratio of 7:3, and spraying a first mixture layer with the thickness of 200-220 mu m on the surface of the aluminum spraying layer by utilizing the first mixture for thermal spraying at the spraying temperature of 390-395 ℃;
step three, mixing lead powder with the particle size of less than or equal to 35 microns and polytetrafluoroethylene powder with the particle size of less than or equal to 35 microns according to the mass ratio of 1:1 to form a second mixture, and spraying a second mixture layer with the thickness of 310-330 microns on the surface of the first mixture layer by utilizing the second mixture for thermal spraying, wherein the spraying temperature is 390-395 ℃;
step three, mixing lead powder with the particle size of less than or equal to 35 microns and polytetrafluoroethylene powder with the particle size of less than or equal to 35 microns according to the mass ratio of 3:7 to form a third mixture, and spraying a third mixture layer with the thickness of 430-470 microns on the surface of the second mixture layer by utilizing the third mixture for thermal spraying, wherein the spraying temperature is 390-395 ℃;
step four, mixing lead powder with the particle size of less than or equal to 35 microns and polytetrafluoroethylene powder with the particle size of less than or equal to 35 microns according to the mass ratio of 1:9 to form a fourth mixture, and performing thermal spraying on the surface of the third mixture layer by using the fourth mixture to spray a fourth mixture layer with the thickness of 560-;
and fifthly, performing electrostatic spraying on polytetrafluoroethylene powder with the particle size of less than or equal to 35 mu m to spray a polytetrafluoroethylene coating with the thickness of more than 1mm on the surface of the fourth mixed layer, sintering the aluminum foil composite glass fiber cloth with the polytetrafluoroethylene coating at the temperature of 375-380 ℃, and cooling to obtain the sealing cloth.
6. The sodium sulfide production settling system of claim 2, wherein: the sedimentation tank is formed by pouring concrete into a tank body, and the inner wall of the tank body is coated with a protective layer made of epoxy resin floor paint.
7. The sodium sulfide production settling system of claim 6, wherein: a first connecting ring is arranged between the sealing cloth and the inner side wall of the sedimentation tank, the first connecting ring comprises a vertical cylindrical first ring body matched with the inner side wall of the sedimentation tank, the first ring body is in sealing connection with the inner side wall of the sedimentation tank by adopting metal glue, an inner edge is arranged at the upper end of the first ring body, the tail end of the inner edge is connected with the upper end of the first ring body into a whole, the height of the head end of the inner edge is lower than that of the tail end of the inner edge, and the sealing cloth is in sealing connection with the inner edge by adopting metal glue; be provided with the second clamping ring between the bottom of pool of sealed cloth and sedimentation tank, the second clamping ring is including the ring form gasket, metal glue sealing connection is adopted with the bottom of pool of sedimentation tank to the gasket, the outer edge of gasket is provided with the turn-ups that upwards turns up, turn-ups lower extreme is as an organic whole with the outer edge of gasket connection, contained angle between turn-ups and the gasket is the acute angle, adopt metal glue sealing connection between sealed cloth and the turn-ups.
8. The sodium sulfide production settling system of claim 1, wherein: and a second sewage discharge pipeline communicated with the first sewage discharge pipeline is arranged below the bottom of the sedimentation tank, and a sewage discharge valve is installed at the tail end of the second sewage discharge pipeline.
9. The sodium sulfide production settling system of claim 1, wherein: the inside mounting of first sewage pipes has the vibrting spear, the external diameter of vibrting spear barred body is less than the internal diameter of first sewage pipes.
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