CN2465771Y - Vacuum mud filter without filter cloth - Google Patents

Abstract

The utility model discloses a vacuum filtration device without filter cloth, which comprises a drum cylinder provided with a supporting rotating shaft and a juice suction conduit provided inside thereof, and is characterized in that the outer surface of the drum cylinder is fixedly covered with a grid plate and a stainless steel microporous filter screen, and the grid is located between the outer surface of the drum cylinder and the filter screen; the vacuum distribution head connected to one end of the rotating shaft of the drum cylinder containing the juice suction conduit is a three-function zoned vacuum distribution head. The device can greatly reduce the light conversion degree of the filter mud discharged by the sugar factory mud juice, improve the processing capacity of the filter mud per unit filtering area, reduce the labor intensity of the operator, and fundamentally eliminate the large amount of water used for washing the filter cloth and the pollution caused.

Description

Vacuum mud filter without filter cloth

The utility model relates to a device for separating liquid from solid, in particular to a mud filter device used in sugar factories.

The clarification and filtration of sugarcane juice is an important process in sugar factories, and its main function is to separate the inclusions mixed in the sugarcane juice from the sugarcane juice as much as possible. The mud juice produced in the clarification process also contains a certain amount of sugar. Through the form of filtration, the sugar remaining in the mud juice can be recovered as much as possible, so that the sugar lost in the filter mud can be reduced to a minimum, and the sugar content can be improved. productivity.

For a long time, the sludge filtration equipment used in almost all sugar factories in my country is the traditional vacuum suction filter with filter cloth and plate and frame filter press. These equipment are used as standard equipment for sugar factory sludge filtration equipment. It has been used in industrial production for quite a long time and has also made a great contribution to my country's sugar production. However, these equipments have the following disadvantages in the process of production and use: one is that the sludge processing capacity of the equipment is limited, the number of equipment required is large, and the equipment investment is relatively large; The third is that the filter cloth used for filtering should be disassembled and cleaned frequently, and the labor intensity of the workers is high. What is more serious is that a large amount of waste water generated by washing the filter cloth is discharged, which seriously pollutes the environment. With the increasing attention to the problem, how to ensure the normal production of the enterprise while ensuring the product quality and quantity of the sugar factory and ensuring that the discharged pollutants meet the standards has become a problem that plagues the development of sugar factories.

The purpose of this utility model is to provide a kind of vacuum mud filter device without filter cloth, it should be able to greatly reduce the degree of light conversion (sugar content) of the discharged filter mud of mud juice filtration, improve the processing capacity of filter mud unit filter area, alleviate The labor intensity of the operators fundamentally eliminates the large amount of water used for washing filter cloths in the sugar factory, reducing a major pollution source in the sugar factory.

The utility model comprises a rotating drum cylinder provided with a supporting rotating shaft and a juice-absorbing conduit inside, wherein the juice-absorbing conduit, the outer surface of the rotating drum cylinder communicates with a vacuum distribution head arranged at one end of the supporting rotating shaft, and a rotating drum transmission device, mud Juice tank, stirring device, hot water spraying device, scraper device and frame, which are characterized by:

(a) the outer surface of the drum cylinder is fixedly covered with a grid and an ultra-thin stainless steel microporous filter, wherein the grid is between the outer surface of the cylinder and the microporous filter;

(b) The vacuum distribution head connected to one end of the rotating shaft containing the juice suction conduit on the drum cylinder is a vacuum distribution head with three functional zones, the low vacuum zone, the high vacuum zone and the normal pressure zone, the low vacuum zone and the high vacuum zone. The vacuum zones communicate with their respective conduits and storage tanks.

On the outer surface of the drum cylinder, it is divided into multiple equal parts according to the circumference, and a longitudinal U-shaped groove is fixed on each equal part, and the Zhou Guo of the ultra-thin stainless steel microporous filter is pressed and fixed on each In the U-shaped groove.

In the vacuum mud filtration device without filter cloth, the drum cylinder lies in the mud tank, and the rotating shafts at both ends are supported by the bearing seats on the frame; the transmission device for rotating the cylinder is at one end of the frame, and the power transmission Give the drum cylinder to make it rotate; the stirring device is set at one end of the rear side of the mud tank, and by constantly swinging the agitator arranged in the mud tank and below the drum cylinder, the mud juice is prevented from settling, and the mud juice and the mud juice are mixed together. Cane chaff is separated to protect the concentration of mud juice in the mud tank; the hot water spray device is installed behind and above the drum cylinder, and there are multiple spray pipes parallel to the surface of the drum cylinder longitudinally. The surface of the pipeline opposite to the drum cylinder is equipped with several water nozzles, which can spray hot water into a spray shape during operation, and spray evenly on the filter mud on the surface of the drum cylinder to dissolve the residue in the filter mud. The sugar is used to facilitate the vacuum absorption of the juice suction pipe network in the drum cylinder; the mud scraper device is located in front of the drum cylinder and fixed on the outer side of the mud juice tank, and its function is to remove the filter mud from the drum cylinder The surface is scratched off. In this way, the drum cylinder rotates continuously under the drive of the transmission device, the filter mud in the mud juice tank is adsorbed on the ultra-thin stainless steel microporous filter net on the outer surface of the drum cylinder, and the sugar in the filter mud is sprayed with hot water Dissolved and vacuum-absorbed into the storage tank by the juice suction pipe network in the drum cylinder, and the filter mud with little sugar content is scraped out by the mud scraper. This cycle continuously filters the filter mud in the mud juice tank, absorbs sugar, and drains the filter mud. Of course, the filter mud that needs to be filtered is also constantly injected into the mud juice tank from the clarification process of sugarcane juice. The whole process is fully automatic, eliminating the need for manual dismantling and washing of the filter cloth, saving a lot of water for washing the filter cloth, eliminating pollution sources, improving the processing capacity of the unit filter area of the equipment filter mud, and improving the sugar production rate.

Below in conjunction with accompanying drawing, the utility model is further described.

Shown in Fig. 1, is the utility model structure front view.

Shown in Fig. 2, it is the left side view of Fig. 1.

As shown in Fig. 3, it is a front view of the drum cylinder structure.

Shown in Figure 4 is the right side view of Figure 3.

As shown in Fig. 5, it is a diagram of the surface structure of the drum cylinder.

As shown in Figure 6, it is a structural diagram of the three-function partition vacuum distribution head.

As shown in Fig. 7, it is a view along the line A-A of Fig. 6C-C.

As shown in FIG. 8, it is a B-B view along the line of FIG. 6C-C.

In the structure of the vacuum mud juice device without filter cloth shown in Fig. 1 and Fig. 2, it can be known that the mud juice tank 8 of rectangular frame shape is in the bottom of the device, and its bottom surface and surroundings are sealed watertight with plates, and the opening is upward. The drum cylinder 1 is vertically lying in the mud tank 8, and the supporting rotating shaft 5 at its center is supported by the bearing blocks 4 at the two ends of the frame. The left end of the supporting rotating shaft 5 is connected with the drum driving device 11 arranged on the outer side of the left end of the frame 3, and the driving device 11 rotates the rotating drum cylinder 1 by driving the supporting rotating shaft 5 to rotate. The outer surface of the drum cylinder 1 is provided with a stainless steel microporous filter screen 16. For the sake of simplicity, in Fig. 1. The U-shaped groove on the outer surface is fixed with a rubber strip 17, and the setting of the filter screen 16 is also illustrated in Fig. 5. A mud juice injection port 10 is provided under the left end of the mud juice tank 8, and the filter mud juice produced in the sugarcane juice clarification process is injected into the mud juice tank 8 of the device through the inlet 10. The stirring drive device 20 is arranged on the back of the mud juice tank 8, and the agitator 9, which is longitudinally arranged in the mud juice tank 8 and below the drum cylinder 1, is driven by the rocking rod 21, so that the agitator 9 continuously swings during operation to prevent The sludge is precipitated to keep the concentration of the sludge in the sludge tank 8 stable. At the rear and top of the drum cylinder 1, a plurality of longitudinal hot water pipes 14 are arranged through the pipe racks 12 fixed on the two ends of the frame 3, and the longitudinal direction of each hot water pipe 14 is basically the same as the longitudinal direction of the drum cylinder. Parallel, each hot water pipe 14 communicates with the hot water injection port 13, on the surface of each hot water pipe 14 opposite to the surface of the drum cylinder 1, a plurality of shower heads 15 are arranged, when hot water is injected Each spray head 15 evenly sprays the sprayed hot water onto the filter mud on the surface of the drum cylinder 1 to dissolve the sugar contained in the filter mud, so as to facilitate the vacuum absorption of the juice suction pipe network in the drum cylinder 1 . The internal structure of the drum cylinder 1 is further illustrated in the following FIGS. 3 and 4 . At the right end of the support shaft 5 of the drum cylinder 1 in Fig. 1, a three-function partition vacuum distribution head 2 is provided, which is provided with a high vacuum area, a low vacuum area and a normal pressure area, which can be connected with the high vacuum area. High vacuum suction pipe 18 and the low vacuum suction pipe 19 that communicates with the low vacuum area can suck out the sugar juice separated from mud juice. The structure of the vacuum distribution head 2 is described in detail in the following FIGS. 6 , 7 and 8 . Above the front of the mud tank 8, a plurality of scraper supports 6 are arranged to support the scraper 7. The scraping opening of the scraper 7 sticks to the outer surface of the drum cylinder 1 longitudinally, and its main function is to peel off the filter mud from the drum cylinder 1 surface.

3 and 4 are structural diagrams of the drum cylinder 1 . Fig. 3 is the sectional view of drum cylinder 1, and drum body is the cylinder body 28 that stainless steel plate rolls and welds, and the reinforced frame that useful section steel 27 and steel plate 26 are formed is welded on the inside of drum body, and end panel 23 is fixed at both ends. The outside of the drum body is evenly divided into multiple equal parts according to the circumference, and a U-shaped groove made of stainless steel is welded longitudinally on the equal parts, which is used to press and fix the stainless steel microporous filter screen 16 by rubber strips 17, which is shown in the lower left of Fig. 3 The angle is represented locally. On the cylindrical body of the drum cylinder 1, the stainless steel plate of the cylindrical body passes through from the inside, and the stainless steel juice suction pipe network 24 is uniformly arranged on the circumference of the cylinder body, and each pipe network 24 communicates with each main juice suction pipe 25 respectively. The other end of each main suction pipe 25 is connected to the vacuum distribution head 2 through the inner side of the right end of the supporting shaft 5, so that the outer surface space of the drum cylinder 1 communicates with the vacuum distribution head 2, and the liquid separated from the mud juice can be separated by forming a vacuum. Sugar juice is introduced into storage tanks. As can be seen in the partial cross-section of Fig. 4, the juice-absorbing pipe network 24 in each longitudinal row is connected with the main juice-absorbing pipe 25 of this column respectively, and the other end of each leading juice-absorbing pipe 25 passes through the right end of the supporting rotating shaft 5 and connects with the vacuum distribution head. 2 phases are connected. Drum supporting rotating shaft 5 left end also has transmission connection with transmission device except supporting rotating drum, makes rotating drum cylinder 1 rotate under the effect of power. I in Fig. 3 is the structure that the surface of the drum cylinder 1 needs to be enlarged and shown, and is shown in Fig. 5 .

In Fig. 5, the surface structure of the drum cylinder 1 is enlargedly shown. On the outer surface of the drum cylinder 28, it is divided into multiple equal parts according to the circumference, and a U-shaped groove 29 is longitudinally welded on each equal part. The limit of massive ultra-thin stainless steel filter screen 16 is pressed and fixed in the U-shaped groove 29 by rubber strip 17. In order to form a juice-absorbing space, to facilitate and ensure the unimpeded flow of filtered juice, a layer of plastic grid plate 30 is arranged between the filter screen 16 and the cylindrical body 28 . After the nozzles of each juice suction pipe network 24 pass through the cylinder body 28, they should not exceed the outer surface of the cylinder body 28, so as to facilitate juice absorption.

Fig. 6, 7, 8 enlarges and represents the structure of three-function zone vacuum distribution head 2, and this distribution head 2 comprises orifice plate 34, distribution plate 33, fixed screw rod 32, and high vacuum suction pipe 18 and low vacuum suction pipe 19. Wherein, as can be seen from Fig. 6 and Fig. 8, the orifice 34 is fixedly connected with the rotating shaft 5 by screws, and the nozzles of each juice-absorbing main conduit 25 pass through the orifice 34, and are flush with the outer plane, and the right side of the orifice 34 There is a positioning concave hole 36 in the center of the surface, and the hole plate 34 rotates with the rotating shaft 5 . Fig. 7 and Fig. 8 are the view 8 of the plane B-B viewed from the left and the view 7 of the plane A-A viewed from the right, taking the line C-C as the interface in Fig. 6 . As can be seen from FIGS. 6 and 7 , the distribution plate 33 is fixedly connected with the attachment 31 through screws, and the attachment 31 is fixedly connected with the bearing seat 4 and the frame 3 through the screw rod 32 , and the distribution plate 33 does not rotate with the rotating shaft 5 . Both the high vacuum suction pipe 18 and the low vacuum suction pipe 19 are fixedly connected with the additional head 31 and communicate with the high vacuum area 39 and the low vacuum area 38 in the distribution plate 33 respectively. There is a protrusion 37 at the center of the distribution plate 33 corresponding to the concave hole at the center of the orifice plate 34 . The high vacuum suction pipe 18 communicates with the high vacuum juice storage tank; the low vacuum suction pipe 19 communicates with the low vacuum suction meter storage tank. On the distribution plate 33, the atmospheric pressure zone 40 is open to the atmosphere. The working principle of the dispensing head 2 is that the C-C surface is the dividing line, the B-B surface rotates with the rotating shaft 5, and the A-A surface does not move. The juice suction nozzle on the rotating surface follows the rotation of the rotating shaft 5, respectively cyclically in the low vacuum area 38, the high vacuum area, etc. Vacuum zone 39 and normal pressure zone 40 are pumped in each storage tank with the method for vacuumizing the sugar juice that separates from mud juice. Because the distribution head 2 is equipped with three areas of low vacuum, high vacuum and normal pressure, the functions are different, so it is called a three-function partition vacuum distribution head.

The working principle of the vacuum mud filtration device without filter surface: the mud juice and cane chaff transported from the sedimentation tank of the sugar factory are uniformly mixed in the mud juice chaff mixer in a certain proportion, and then transported to the mud juice tank of the filter device; A stirring device is installed between the mud tank and the cylindrical surface of the drum. Driven by the motor and other reduction devices, the stirring device swings back and forth between the mud tank and the drum to ensure the stability of the concentration of the mud. and prevent the impurities in the mud juice from settling; the motor controlled by frequency conversion technology can adjust the appropriate drum rotation speed; the two vacuum juice tanks connected with the vacuum pump are adjusted by the vacuum regulating valve, so that the two tanks respectively produce high, Low vacuum, the vacuum distribution head connected with the juice suction pipe network in the drum cylinder divides the surface of the drum cylinder into three areas of low vacuum, high vacuum and normal pressure according to the working order, so that the mud juice in the filtration process can also be absorbed, Washing water (including drying) and mud unloading are carried out in three sequential cycles. The low-vacuum area is located at the bottom mud soaking part of the drum. This area is the area for absorbing filter mud and impurities. When the drum enters this area, the juice suction pipes in this area are all connected to the low-vacuum area of the vacuum distribution head. , through the connection of the stainless steel juice suction tube, the juice suction space between the microporous filter and the drum surface forms a negative pressure. Under the action of negative pressure, the sugar juice can pass through the micropores on the stainless steel microporous filter and enter the grid juice suction space And it flows into the low-vacuum juice tank through the juice suction pipe and the vacuum distribution head, and due to the effect of negative pressure, the filter mud, cane bran and other impurities mixed in the mud juice are also continuously adsorbed to the surface of the filter mesh and increase , thickening; with the rotation of the drum, it enters the high vacuum area. In the first half of this area, the hot water spraying device sprays hot water on the filter mud adsorbed on the drum surface to extract the filter mud as much as possible. The sugar in the mud, the hot water and the washed sugar also pass through the micropores of the filter screen and flow into the high-vacuum juice pumping tank through the juice suction pipe. Vacuum, so as to absorb the water in the filter mud as much as possible, further absorb the sugar in the filter mud, and dry the discharged filter mud; then enter the normal pressure zone, the normal pressure zone is the sludge unloading zone, and the vacuum is released in this zone , so that the filter mud adhering to the surface of the filter screen falls off. In this way, the three steps of adsorption, water washing (including drying) and sludge discharge are cycled, so that the production can be continuously and balanced.

Claims (3)

1. A vacuum mud filter without filter cloth, which comprises a drum cylinder (1) provided with a supporting shaft (5) and a juice suction conduit (24, 25) inside, wherein the juice suction conduit (24, 25) ) communicates with the outer surface of the drum cylinder and the vacuum distribution head (2) located at one end of the supporting shaft (5), and is characterized in that: (a) on the outer surface of the drum cylinder (1), it is fixedly covered with a grid plate (30) and a stainless steel microporous filter screen (16), wherein the grid plate (30) is between the outer surface of the cylinder and Between microporous filter screens (16); (b) The vacuum distribution head (2) connected to the end of the rotating shaft of the drum cylinder containing the juice suction conduit is a vacuum distribution head provided with three functional zones of low vacuum zone, high vacuum zone and normal pressure zone. 2. The filter cloth-free vacuum mud filter device according to claim 1, characterized in that: the outer surface of the drum cylinder (1) is divided into multiple equal parts according to the circumference, and each equal part is longitudinally A U-shaped groove (29) is fixed, and the limit of the stainless steel microporous filter screen (16) is compressed and fixed in the U-shaped groove (29) by a rubber strip (17). 3. The filter-cloth-free vacuum source juice filtering device according to claim 1, characterized in that: on the distribution plate (33) of the vacuum distribution head (2) with three functions, there is a low-vacuum area (38 ), a high vacuum area (39) and a normal pressure area (40), and communicate with respective conduits and tanks respectively.

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