Paint residue dewatering mechanism and automatic painting wastewater treatment and paint residue dewatering integrated device

Abstract

The application discloses a paint residue dewatering mechanism and an automatic coating wastewater treatment and paint residue dewatering integrated equipment. The paint residue dewatering mechanism comprises a dewatering mechanism and a filtered wastewater storage box. The dewatering mechanism comprises a dewatering box, a pressing plate, a water filtering plate and a transmission blade arranged in the dewatering box. The dewatering box is connected with the filtered wastewater storage box at the bottom and is provided with a residue inlet and a residue outlet with a higher end at the other end. The pressing plate extends in the horizontal direction. The water filtering plate is arranged below the pressing plate in an inclined manner, so that the water filtering plate gradually approaches the pressing plate from one end close to the residue inlet to the other end. The water filtering plate is uniformly provided with a plurality of groups of strip-shaped water passing holes, and each group of strip-shaped water passing holes comprises a plurality of strip-shaped water passing holes extending in the inclined direction. The transmission blade is rotatably arranged in the strip-shaped water passing hole, and the transmission blade in each group of strip-shaped water passing holes is uniformly protruded from the water filtering plate by a predetermined height, so as to drive the paint residue coming from the residue inlet to the residue outlet, and cooperate with the pressing plate to extrude the paint residue close to the residue outlet for dewatering. The dewatering effect is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paint residue dewatering, and particularly relates to a paint residue dewatering mechanism and an automatic coating wastewater treatment and paint residue dewatering integrated device. BACKGROUND

[0002] Water-based paint is used for spraying of engineering machinery, and the water-based paint is dissolved in water. For a coating line of a water suspension structure, coating wastewater treatment is a difficult problem. Generally, a combined treatment of coating wastewater is adopted by using a reagent and a device.

[0003] At present, a plate and frame filter type is mostly used for the device for treating coating wastewater. The treatment device needs manual intervention for paint residue removal, and the device is large and the process is complex, so that the treatment cost is high. Meanwhile, it is difficult to ensure the quality and consistency of paint residue dewatering under the condition of manual intervention. SUMMARY

[0004] The paint residue dewatering mechanism and the automatic coating wastewater treatment and paint residue dewatering integrated device provided by the present application can dewater paint residue by using a pure mechanical pressing mode, can reduce the phenomenon of paint residue caking, can dewater paint residue more uniformly, and can make the integrated device structure more compact, so that the paint residue dewatering mechanism and the automatic coating wastewater treatment and paint residue dewatering integrated device have small floor space and are convenient to use.

[0005] The first aspect of the present application provides a paint residue dewatering mechanism, which comprises a dewatering mechanism and a filter wastewater storage box. The dewatering mechanism comprises a dewatering box and a pressing plate, a water filtering plate and a transmission blade arranged in the dewatering box. The dewatering box is provided with a bottom opening communicating with the filter wastewater storage box. The dewatering box has opposite residue inlet and residue outlet, and the residue outlet is higher than the residue inlet in the height direction.

[0006] The pressing plate extends along the horizontal direction.

[0007] The water filtering plate is arranged below the pressing plate in an inclined manner, so that the water filtering plate gradually approaches the pressing plate from one end close to the residue inlet to the other end. The water filtering plate is uniformly provided with a plurality of groups of strip-shaped water passing holes along the inclined direction, and each group of strip-shaped water passing holes comprises a plurality of strip-shaped water passing holes extending along the inclined direction.

[0008] The transmission blade is distributed in the strip-shaped water passing hole in a directionally rotatable manner, and the transmission blade in each group of strip-shaped water passing holes is uniformly protruded from the water filtering plate by a predetermined height, so as to drive the paint residue coming from the residue inlet to the residue outlet, and cooperate with the pressing plate to extrude the paint residue for dewatering close to the residue outlet.

[0009] In a possible implementation, the top of the dewatering box is provided with a lifting cylinder near the slag outlet, and one end of the pressing plate near the slag outlet is connected to the lifting rod of the lifting cylinder in a manner that can be driven to move up and down.

[0010] In a possible implementation, the strip-shaped water passing hole has a pore size of less than or equal to 1 mm, and the transmission blade is plate-shaped, and has a thickness of 0.65 mm to 0.87 mm.

[0011] In a possible implementation, the transmission shaft is arranged in the filter plate corresponding to each group of strip-shaped water passing holes, and the transmission blade is mounted on the transmission shaft.

[0012] The end of the transmission shaft is sleeved with a transmission wheel, and the dewatering box is provided with a rotary motor at one end near the slag inlet, and the rotary shaft of the rotary motor is connected to the transmission wheel through a transmission belt or a transmission chain.

[0013] In a possible implementation, the transmission blade is an integrated blade, which is elliptical and vertically sleeved on the transmission shaft through the center.

[0014] In a possible implementation, the transmission blade is a split blade, which includes a plurality of blades uniformly distributed along a virtual circle, and the plurality of blades are fixedly mounted on the surface of the transmission shaft.

[0015] In a possible implementation, the transmission blades in the two adjacent groups of strip-shaped water passing holes are gap-fitted, and the maximum gap is 20 mm.

[0016] In a possible implementation, the outer diameter of the transmission blade near the slag inlet is larger than the outer diameter of the transmission blade near the slag outlet, and the gap between the transmission blade near the slag inlet and the pressing plate is larger than the gap between the transmission blade near the slag outlet and the pressing plate.

[0017] The second aspect of the embodiment of the present application provides an automatic waste paint water treatment and paint slag dewatering integrated equipment, which comprises a paint water separation mechanism and a paint slag dewatering mechanism as described above, wherein the paint water separation mechanism comprises a reaction tank and a slag scraping plate, the reaction tank is arranged near the slag inlet and used for storing waste water and reaction reagents, the slag scraping plate is arranged near the upper part of the reaction tank and on the reaction tank in a manner that can be oriented to move, so as to direct the floating paint slag flocculation to the slag inlet.

[0018] In a possible implementation, one side of the reaction tank is provided with a reagent pump, the reagent pump is connected with a reagent adding pipe for communicating with the reaction tank, and the upper part of the reaction tank is provided with a waste water supply port or a waste water supply pipe.

[0019] Beneficial effects: Compared with the prior art, the paint residue dewatering mechanism and the automatic coating wastewater treatment and paint residue dewatering integrated device provided by the application can realize the conveying of paint residue through the continuous rotation of the transmission blade, wherein the paint residue is continuously cut during the forward transmission of the transmission blade, the phenomenon of paint residue caking is reduced, and the paint residue dewatering is more uniform, wherein the pure mechanical residue extrusion is formed through the cooperation of the transmission blade and the pressing plate, the energy consumption is low, the maintenance is easy, and the residue leakage phenomenon is basically eliminated.

[0020] Wherein the height of the pressing plate at one end of the residue outlet is adjusted by the lifting cylinder, the minimum gap between the transmission blade and the pressing plate, i.e., the minimum residue extrusion gap, can be flexibly adjusted, the paint residue dewatering quality is ensured, and the paint residue dewatering is suitable for various situations, and the application range is wide.

[0021] Wherein the transmission blade is in an elliptical shape, which can not only convey paint residue, but also form a gradually narrowing residue extrusion gap with the pressing plate near the residue outlet in rotation, instead of a fixed residue extrusion gap, and the dewatering effect is better.

[0022] Wherein the integrated device is formed by combining wastewater treatment and paint residue dewatering, the overall structure is more compact, the occupied area is small, and the use is more convenient.

[0023] These and other objects, features and advantages of the present application will become apparent with reference to the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A three-dimensional structure schematic diagram of the paint residue dewatering mechanism of the application is shown.

[0025] Figure 2 A partial structure schematic diagram of the paint residue dewatering mechanism of the application is shown.

[0026] Figure 3 A partial structure schematic diagram of the filter plate in the application is shown.

[0027] Figure 4 A three-dimensional structure schematic diagram of the automatic coating wastewater treatment and paint residue dewatering integrated device of the application is shown.

[0028] Figure 5 A partial structure schematic diagram of the automatic coating wastewater treatment and paint residue dewatering integrated device of the application is shown.

[0029] Figure 6 A paint residue dewatering effect schematic diagram of the application technology is shown. DETAILED DESCRIPTION

[0030] The following description is presented to enable any person skilled in the art to practice the application as claimed. Preferred embodiments are presented in the following description only as examples and modifications can be made by persons skilled in the art having the benefit of this disclosure. The present application is directed to overcoming one or more of the limitations set forth above. Various aspects of the application are described and exemplified in the following description.

[0031] Those skilled in the art will appreciate that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like as can be used herein, merely describe orientations in relation to the application as presented in the figures, and are not intended to denote specific orientations of or positions for the apparatus or elements thereof, and so the above terms are not to be interpreted as limiting the application.

[0032] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in an embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0033] Reference Figures 1 to 3 In the first aspect, the paint residue dewatering mechanism 100 comprises a dewatering mechanism and a filter wastewater storage tank 10, wherein the dewatering mechanism comprises a dewatering tank 20 and a pressing plate 30, a filter plate 40, and a transmission blade 50 arranged in the dewatering tank 20, wherein the dewatering tank 20 is provided with a bottom opening 201 communicating with the filter wastewater storage tank 10, for storing the filtered water in the filter wastewater storage tank 10, wherein the dewatering tank 20 has opposite residue inlet 202 and residue outlet 203, and in the height direction, the residue outlet 203 is higher than the residue inlet 202, wherein the paint residue conveyed is received through the residue inlet 202, and the dewatered paint residue is conveyed away through the residue outlet 203;

[0034] The pressing plate 30 extends in the horizontal direction, and the water filtering plate 40 is obliquely arranged below the pressing plate 30, so that the water filtering plate 40 gradually approaches the pressing plate 30 from one end close to the residue inlet 202 to the other end, that is, the water filtering plate 40 gradually inclines upward from one end close to the residue inlet 202 to one end close to the residue outlet 203, so that the gap between the water filtering plate 40 and the pressing plate 30 becomes smaller and smaller. The water filtering plate 40 is uniformly provided with a plurality of groups of strip-shaped water passing holes 401 in the oblique direction, and each group of strip-shaped water passing holes 401 includes a plurality of strip-shaped water passing holes 401 extending in the oblique direction, and the plurality of strip-shaped water passing holes 401 in each group are uniformly distributed in the vertical direction of the oblique direction, for filtering the water separated from the paint residue through the strip-shaped water passing holes 401. Generally, the aperture of the strip-shaped water passing hole 401 is less than or equal to 1 mm, and there is basically no residue leakage phenomenon, only the water squeezed out is leaked;

[0035] The transmission blade 50 is distributed in the strip-shaped water passing hole 401 in a directionally rotatable manner, and the transmission blade 50 in each group of strip-shaped water passing holes 401 protrudes from the water filtering plate 40 by a predetermined height, so as to transmit the paint residue coming from the residue inlet 202 to the residue outlet 203, and cooperate with the pressing plate 30 to extrude the paint residue for dehydration near the residue outlet 203.

[0036] Therefore, the paint residue dehydration mechanism provided by the present application transports the paint residue through the transmission blade 50, which can continuously cut the paint residue during transportation, reduce the phenomenon of paint residue caking, make the paint residue more uniform, lay a good foundation for subsequent extrusion dehydration, ensure the quality of paint residue dehydration, on the one hand, and on the other hand, when the paint residue is transported to the highest position of the transmission blade 50, the transmission blade 50 cooperates with the pressing plate 30 to form an extrusion gap for mechanical extrusion dehydration, which not only ensures the dehydration quality, but also reduces the energy consumption and saves the dehydration cost. In the direction of paint residue transportation, the gap between the transmission blade 50 on the water filtering plate 40 and the pressing plate 30 becomes smaller and smaller, which can achieve the effect of progressive extrusion instead of fixed extrusion value formed by fixed gap, and also ensures the effect of paint residue dehydration;

[0037] The paint residue dehydration rate can reach 60%, and the dehydration rate=(weight before dehydration-weight after dehydration) / weight before dehydration*100%= (200-80) / 200*100%=60%;

[0038] The water content after dehydration=(weight after dehydration-weight after complete drying) / weight after dehydration*100%= (80-46.45) / 100*100%=33.5%. After the paint residue is naturally dried for a period of time after dehydration, it is taken to be dried, and then the absolutely dry paint residue is obtained. Through calculation, the water content after dehydration is 33.5%, and the water content of the paint residue after natural drying is less than 30% (reference Figure 6 ).

[0039] The transmission blade 50 is a stainless steel blade, and the blade replacement cycle is about 2 years.

[0040] The water filtering plate 40 can be a whole plate or a plurality of plates connected in sequence, and the latter is convenient to disassemble and maintain.

[0041] In an embodiment, the top of the dehydration tank 20 is provided with a lifting cylinder 21 near the slag outlet 203, and one end of the pressing plate 30 near the slag outlet 203 is connected to the lifting rod of the lifting cylinder 21 in a manner that can be driven to move up and down, so that the minimum gap between the pressing plate 30 and the transmission blade 50 is changed by adjusting the height of the end of the pressing plate 30 near the slag outlet 203, thereby ensuring the stability of the pressing plate 30 on one hand (most of the right side of the pressing plate 30 is fixed on the dehydration tank 20), and adjusting the height of the pressing plate 30 according to actual needs or paint slag on the other hand, which is more convenient to use and has a wide range of applications.

[0042] In an embodiment, the transmission blade 50 is in the form of a plate, so that it can not only cut the paint slag, but also press the paint slag by the top plate surface in cooperation with the pressing plate 30. In addition, the preferred thickness of the transmission blade 50 is 0.65-0.87 mm, which can rotate in the strip-shaped water passing hole 401 and has better structural strength.

[0043] In an embodiment, the transmission shaft 41 is arranged in the water filtering plate 40 corresponding to each group of strip-shaped water passing holes 401, and the transmission blade 50 is installed on the transmission shaft 41.

[0044] The end of the transmission shaft 41 is sleeved with a transmission wheel, and the dehydration tank 20 is provided with a rotating motor 22 near the slag inlet 202, wherein the rotating shaft of the rotating motor 22 is connected to the transmission wheel through a transmission belt or a transmission chain, which is used to drive the transmission shaft to rotate synchronously through the rotating motor 22, so that all the transmission blades 50 can rotate synchronously to convey and press the paint slag.

[0045] In a preferred embodiment, the transmission blade 50 is an integral blade in the shape of an ellipse, which is vertically sleeved on the transmission shaft 41 through the center. A circular or circular-outer-periphery blade can also transport paint residue and squeeze the paint residue with the pressing plate 30 to dehydrate, and also has the effect of gradually reducing the squeezing gap to achieve progressive squeezing, but when the outer periphery of the transmission blade 50 is elliptical, the transmission blade 50 has the effect of changing the height of the convex (filter plate 40) during rotation to transport in a poking manner, which has a better transport effect. In addition, based on the inclined extension of the filter plate 40, the gap between the transmission blade 50 and the pressing plate 30 distributed in the inclined direction is gradually reduced for progressive squeezing. On this basis, the outer periphery of the transmission blade 50 itself has an arc, so that the transmission blade 50 can also achieve the effect of progressive squeezing of the paint residue by cooperating with the pressing plate 30, and the quality of paint residue dehydration is better.

[0046] That is, the elliptical transmission blade 50 has better effects of poking and transporting paint residue, has high transport efficiency on the basis of being able to cut paint residue, and on the other hand, the transmission blade 50 in each group of strip-shaped water holes 401 can achieve the effect of progressive squeezing. Thirdly, the elliptical structure of the single transmission blade 50 can further enhance the effect of progressive squeezing and dehydration.

[0047] In addition, the elliptical blade also has the effect of self-cleaning, easy maintenance, and does not need backwashing.

[0048] In another embodiment, the transmission blade 50 is a split blade, which includes a plurality of blades uniformly distributed along a virtual circle, and the plurality of blades are fixedly installed on the surface of the transmission shaft 41. This effect is similar to the structure of the aforementioned integral blade, except that the distribution method is changed, which will not be described in detail here.

[0049] In an embodiment, the transmission blade 50 between the two adjacent groups of strip-shaped water holes 401 is gap-fitted, and the maximum gap is 20 mm, so that paint residue can be continuously transported between the two adjacent groups of transmission blades 50, and the problem of paint residue stagnation does not occur. In addition, two or three groups of transmission blades 50 can also be arranged in the same group of strip-shaped water holes 401, and the gap between the adjacent two transmission blades 50 in the transport direction is also less than 20 mm on the premise that these transmission blades 50 do not interfere with each other.

[0050] In view of the fact that the paint sludge just entering the dewatering tank 20 has not been dewatered and the amount of paint sludge is relatively large, which can easily affect the conveying efficiency of the transmission blade 50, in an embodiment, the outer diameter size of the transmission blade 50 close to the sludge inlet 202 is larger than the outer diameter size of the transmission blade 50 close to the sludge outlet 203, and the gap between the transmission blade 50 close to the sludge inlet 202 and the pressing plate 30 is larger than the gap between the transmission blade 50 close to the sludge outlet 203 and the pressing plate 30, that is, the outer diameter sizes of the transmission blades 50 in each group are consistent, but the outer diameter size of the transmission blade 50 in the group close to the sludge inlet 202 is relatively larger than that of the other groups. In this way, the outer diameter size of the transmission blade 50 gradually decreases from the sludge inlet 202 to the sludge outlet 203, which does not affect the effect of the gradual extrusion dewatering achieved by the gradually decreasing gap, and at the same time, the gradually decreasing design of the outer diameter size can ensure the overall material conveying efficiency of the transmission blade 50, which is high in working efficiency and does not affect the effect of cutting the paint sludge.

[0051] The second aspect of the embodiment of the present application provides an automatic painting wastewater treatment and paint sludge dewatering integrated equipment, which combines Figure 4 and Figure 5 , and comprises a paint-water separation mechanism 200 and a paint sludge dewatering mechanism 100 as described above, wherein the paint-water separation mechanism 200 comprises a reaction tank 60 and a sludge scraping plate 70, wherein the reaction tank 60 is close to the sludge inlet 202 and is used for storing wastewater and reaction reagents, and the sludge scraping plate 70 is close to the upper part of the reaction tank 60 and is arranged on the reaction tank 60 in a manner capable of directional movement to direct the floating paint sludge flocculation to the sludge inlet 202.

[0052] The movement of the sludge scraping plate 70 can be driven by a sludge scraping motor arranged below the reaction tank 60. The rotating shaft of the sludge scraping motor is sleeved with a driving wheel, and a driven wheel is arranged at the other end below the reaction tank 60. A conveying chain is sleeved between the driving wheel and the driven wheel, and the sludge scraping plate 70 is fixed on the conveying chain. The sludge scraping plate is reciprocally moved by the rotation of the conveying chain to scrape and convey the paint sludge to the sludge inlet 202.

[0053] In an embodiment, a reagent pump is arranged on one side of the reaction tank 60. The reagent pump is connected with a reagent adding pipe for communicating the reaction tank 60, which is used for conveying the prepared chemical reagents to the reaction tank to react with the wastewater to realize paint-water separation, and the paint sludge flocculation automatically floats to the surface. A wastewater supply port or a wastewater supply pipe is arranged above the reaction tank 60, which is connected with a lifting pump in a wastewater pool to continuously and automatically supply the wastewater to the reaction tank 60.

[0054] It should be noted that the terms "first", "second", and "third" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or some sort of hierarchy among the elements. These terms can be read disjunctively to the extent they can refer to names of things.

[0055] It will be understood by those within the art that, in this application, specific embodiments have been described herein in close detail while presenting the application as not limited to such embodiments. It thus should be appreciated that the application can be embodied in other forms without departing from the spirit or essential character of the application. The embodiments described herein are to be considered in all respects as illustrative only and not restrictive in character. The scope of the embodiments of the present application is thus indicated by the appended claims rather than the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are intended to be embraced therein.

Claims

1. A sludge dewatering mechanism, characterized by, The paint sludge dewatering device comprises a dewatering mechanism and a waste water storage tank, wherein the dewatering mechanism comprises a dewatering tank, a pressing plate, a water filtering plate and a transmission blade arranged in the dewatering tank; the dewatering tank is provided with a bottom opening communicated with the waste water storage tank; the dewatering tank is provided with opposite paint sludge inlet and outlet; the paint sludge outlet is higher than the paint sludge inlet in the height direction. The pressing plate extends in the horizontal direction. The water filtering plate is arranged below the pressing plate in an inclined manner, so that the water filtering plate gradually approaches the pressing plate from one end to the other end close to the paint sludge inlet; a plurality of groups of strip-shaped water passing holes are uniformly arranged in the inclined direction of the water filtering plate; each group of strip-shaped water passing holes comprises a plurality of strip-shaped water passing holes extending in the inclined direction. The transmission blades are arranged in the strip-shaped water passing holes in a directionally rotatable manner; the transmission blades in each group of strip-shaped water passing holes are uniformly protruded from the water filtering plate by a predetermined height, so as to transmit the paint sludge coming from the paint sludge inlet to the paint sludge outlet, and to press the paint sludge close to the paint sludge outlet to perform dewatering in cooperation with the pressing plate.

2. The paint sludge dewatering mechanism according to claim 1, wherein The dewatering tank is provided with a lifting cylinder at the top close to the paint sludge outlet; one end of the pressing plate close to the paint sludge outlet is connected to the lifting rod of the lifting cylinder in a manner that can be driven to move up and down.

3. The paint sludge dewatering mechanism of claim 1, wherein The aperture of the strip-shaped water passing hole is less than or equal to 1mm; the transmission blade is in the form of a plate; the thickness of the transmission blade is 0.65-0.87mm.

4. The paint sludge dewatering mechanism according to claim 3, wherein The water filtering plate is provided with a transmission shaft corresponding to each group of strip-shaped water passing holes; the transmission blade is mounted on the transmission shaft. The end of the transmission shaft is sleeved with a transmission wheel; the dewatering tank is provided with a rotating motor at one end close to the paint sludge inlet; the rotating shaft of the rotating motor is connected to the transmission wheel through a transmission belt or a transmission chain.

5. The paint sludge dewatering mechanism of claim 4, wherein The transmission blade is an integrated elliptical blade; the transmission blade is vertically sleeved on the transmission shaft through the center.

6. The paint sludge dewatering mechanism of claim 4, wherein The transmission blade is a split elliptical blade; the split elliptical blade is composed of a plurality of elliptical blades uniformly distributed along a virtual circle; the plurality of elliptical blades are fixedly mounted on the surface of the transmission shaft.

7. The paint sludge dewatering mechanism according to claim 5 or 6, wherein The transmission blades in two adjacent groups of strip-shaped water passing holes are gap-fitted; the maximum gap is 20mm.

8. The paint sludge dewatering mechanism according to claim 5 or 6, wherein The outer diameter of the transmission blade close to the paint sludge inlet is larger than the outer diameter of the transmission blade close to the paint sludge outlet; the gap between the transmission blade close to the paint sludge inlet and the pressing plate is larger than the gap between the transmission blade close to the paint sludge outlet and the pressing plate.

9. An automatic painting wastewater treatment and paint sludge dewatering integrated device, characterized by, The paint sludge dewatering device comprises a paint water separation mechanism and a paint sludge dewatering mechanism according to any one of claims 1-8, wherein the paint water separation mechanism comprises a reaction tank and a sludge scraping plate; the reaction tank is close to the paint sludge inlet and is used for storing waste water and reaction reagents; the sludge scraping plate is close to the upper part of the reaction tank and is arranged on the reaction tank in a directionally movable manner to directionally scrape the paint sludge flocculation floating up to the paint sludge inlet.

10. The automatic painting wastewater treatment and sludge dewatering integrated device according to claim 9, characterized by, One side of the reaction tank is provided with a reagent pump; the reagent pump is connected with a reagent adding pipe communicated with the reaction tank; the upper part of the reaction tank is provided with a waste water supply port or a waste water supply pipe.

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