KR20090062600A - Heated and pressurized filter plate of filter press - Google Patents

Abstract

A high temperature pressing typed-filter plate is provided to minimize yield of sludge cake and supply a heat media having high temperature by comprising a main component part of the filter plate with a metal material or a composite material. A high temperature pressing typed-filter plate comprises a main frame(10), a plurality of inner frames(20), diaphragms, and an outer frame(40). A gasket(21,22) is formed on an outer side of the inner frame. The diaphragm is combined on the outer side of the gasket. A plurality of fixing bolt holes(47) are formed on an edge part of the outer frame. A sludge supply port(15) and a filtrate discharge port(45) are formed on the edge and the center part of the main frame and the diaphragm. A metal yarn storied net frame(35) is combined on the outer side of the gasket. The gasket is combined on the outer frame.

Description

Heat Press Filter Plate of Filter Press {Heated and Pressurized Filter plate of Filter press}

The present invention relates to a high-temperature pressurized filter plate mounted on a filter press, and more particularly, to supplying a working fluid of high temperature and high pressure to a filter press filter plate applied to solid-liquid separation and dehydration in various industrial processes and water treatment processes. The sludge in the chamber is compressed by the expansion of the fram, and at the same time, heat is transferred through the diaphragm from the working fluid inside the filter plate, which greatly reduces the viscosity resistance of the sludge cake, increases the dehydration efficiency, and enables the smooth discharge of the filtrate. The present invention relates to a high-temperature pressurized filter plate comprising a diaphragm, which is a heat transfer and compression operation part, made of metal or a composite material.

The present invention is the diaphragm is coupled to both sides of the mainframe of each filter plate in order to reduce the water contained in the sludge supplied between each filter plate installed in the filter press and the liquid contained in the dehydrated cake of the solid form separated from the liquid The heat medium supplied from the heat medium supply means after the sludge supplied at a constant pressure from the sludge supply means is combined with the filter cloth surrounding the main frame and the diaphragm of the center, and is first filtered in the chamber between each filter plates. The diaphragm is expanded by heat exchange between the high-temperature, high-pressure heating medium and the dehydrating cake, so that the second sludge cake is dehydrated and dried. However, in the past, most of the filter plates are generally made of polypropylene or rubber to induce secondary dehydration and drying of the sludge cake, and a heat flow medium of about 70 to 80 ° C. is generally used. That is, in the case of the conventional compressed filter plate, since the sludge cake filled in the chamber between each filter plate must be composed of a flexible material that can be expanded within a certain range when providing a high temperature and high pressure heating medium, rubber or poly Propylene-based synthetic resin was used. However, since a direct factor for increasing the secondary dewatering and drying efficiency of the sludge cake is to form a flow path by lowering the viscosity of the sludge cake, for this purpose, technology development has been made to increase the temperature of the heat medium.

However, since the material used for the conventional diaphragm material is made of rubber or polypropylene synthetic resin material, the temperature of the heat medium has to be maintained only at about 70 to 80 ° C. In general, if the temperature exceeds this temperature range, the diaphragm made of rubber or polypropylene causes a change in physical properties to reach a limit point (when using a high temperature). Therefore, there is a limit in using a high temperature heat medium, so the limit of water content of the sludge cake has to be reached. In addition, as another operation technology for obtaining the heating effect of the sludge cake, a simple hot plate is sandwiched between the existing compressed filtration plates, but this is also impossible because of the secondary pressure, the second compression filtration is made in the existing filter plate 1 Due to the crimping effect of the two sections, the crimping effect is not only small, but because of the thermal fatigue, the pressurized water can be crimped with a pressing force of about 5 bar.

In addition, in the case of the dewatered sewage sludge cake, when the moisture content reaches a level of about 65%, the peeling of the cake from the surface portion of the compression filtration plate is carried out at the same time by self-weight upon release of the compression filtration plate. In this case, the separation of the dewatering cake from the compression filtration plate is not performed smoothly, and a separate cake peeling device using a scraper or vibration for detaching the dewatering cake attached to the surface of the compression filtration plate during the disassembly of the compression filtration plate is used. Since the configuration of the mechanical device is complicated to be added to, and the device is manufactured at a high price, there was a disadvantage that acts as a factor that increases the production cost.

 The present invention has been invented to solve the disadvantages of the conventional high pressure filter plate, the present invention is composed of a major component of the compressed filter plate for compressing and dewatering the various sludge made of a metal material or a composite material much higher than the conventional high temperature (up to 200 ℃) It is an object of the present invention to provide a high temperature pressurized filter plate having a structure capable of providing a thermal medium and minimizing the water content of sludge cake.

 In order to achieve the above object, the high-temperature pressurized filter plate according to the present invention is formed with a sludge supply port of a predetermined size in the center, the filtrate discharge port is provided at each corner of the inner side, the filter cloth is covered with the outside of the plurality is closely adhered to each other It is configured to allow the primary dewatering of the sludge supplied by the constant pressure into the chamber between each filter plate in the state, and at the same time, the secondary dewatering and drying by the heat medium supplied from the heat medium supply means of high temperature and high pressure.

That is, the high-temperature compression filter plate according to the present invention is located in the center portion made of a thin metal material and the main frame is supplied with a high-temperature heating medium; An inner frame installed at an edge of the main frame to maintain a step from both sides of the main frame; A sludge supply port installed at the center of the filter plate or at the side of the filter plate to supply sludge between the filter chambers formed of two filter plates; A heat medium supply pipe and a discharge pipe connected to the main frame for discharging the heat medium supplied or heat-exchanged from the heat medium supply means; A diaphragm coupled to both inner frames and a diaphragm installed on both upper surfaces of the gasket, which is made of a metallic material or a composite material that is expanded or contracted under pressure when a heat medium is supplied or discharged; Located in the upper diaphragm, the diaphragm and the filter cloth are adhered to each other when the diaphragm is expanded, so that the dehydrated water can not move to the filtrate outlet. ; The outer frame of the metal is coupled to the main frame at the upper portion of each diaphragm so as to form a chamber chamber (Chamber) of a constant height to the outside of the diaphragm, the filtrate discharge port is provided at the inner corner and coupled to the metal sand layer network frame. It consists of.

Further, in forming the filter plate of the filter press, when the diaphragm expanded and contracted by supplying and discharging high-temperature and high-pressure heating medium to be a metal material resistant to corrosion, pressure, and temperature, stress generated by expansion and contraction of the diaphragm It is formed into a spiral pattern with a spiral shape so as to smoothly solve the problem, and it forms a wave pattern facing outward from the center, and when it is unmolded, the heat transfer is high, and the elasticity enables the movement of the diaphragm, and it is a composite material resistant to high temperature and high pressure. Use

In addition, the sludge supply port is installed at the center or side of the filter plate to supply the sludge to the female chamber formed by two filter plates.The joint block is formed on the main frame to secure a space where the heat medium is filled, and it is sealed with a gasket. Adopt the flange fixing method to The joint block is spiraled, and the flange bolt is tightened from the flange to the joint block.When the head of the bolt rises over the flange, the sludge is stagnated when two filter plates are joined to form a sludge supply line. As a result, processing is necessary to make squeeze inside the flange. The material of the filter cloth installed on the filter plate of the existing filter press is stretched under high temperature and high pressure operating conditions and leads to the filtration incapacity state. Therefore, the fiber cloth with high heat resistance is mixed and woven in a ratio to increase the durability of the filter cloth and to increase the durability of the filter cloth. The heat transfer is possible and the heat transfer rate is high, making the filter cloth suitable for use in the filter press operated at high temperature and high pressure. When the sludge is compressed by high pressure heating medium supply, the filtrate dehydrated from the sludge passes through the filter cloth but does not move to the outlet, but is stagnated between the filter cloth and the diaphragm compressed at a high pressure, thereby reducing the dewatering effect. In order to prevent this stagnation phenomenon, between the diaphragm and the filter cloth, a metal mesh layered mesh or a metal fabric mixture layered mesh is installed. Lamination network is formed by connecting loops and loops horizontally or vertically, or by weaving them by crossing the warp and weft at right angles. It can provide a passage and prevent the direct transfer of the temperature of the hot diaphragm to the heat-sensitive filter cloth, and serves to extend the life of the filter cloth. The metal sand layer network is fixed to the frame located between the diaphragm and the outer frame, and is connected to the frame and the fixed blocks (A, B type) so that it is not affected by the movement of the diaphragm and prevents the deadlock between the filter cloth and the diaphragm. To facilitate removal.

As described above, the high temperature pressurized filter plate according to the present invention is capable of supplying a high temperature heat medium during the second compression filtration in a dehydrating cake formed after the first pump pressure filtration, and a metal material having excellent heat transfer performance or high temperature and high pressure shrinkage expansion motion. Compressive dewatering and drying of the first dewatered sludge cake by forming a diaphragm or the like with this possible composite material can produce a sludge cake having a low water content at a lower pressure than conventionally.

Such a filter plate has the following characteristic structure. The sludge supply port connected to the diaphragm from the mainframe increases the airtightness by applying joint blocks and flanges, maintains the filtration efficiency when applying the high temperature and high pressure heating medium, and applies the filter cloth woven fabric mixed with durable and heat resistant fiber and metal yarn. In order to prevent the discharge of the filtrate due to the compression of the diaphragm and the application of the metal sand layer frame, stable high temperature and high pressure heating medium operation is possible and high efficiency sludge dewatering is possible.

The present invention will be described in more detail with reference to the accompanying drawings and embodiments.

However, the accompanying drawings and embodiments are merely illustrative for easily describing the content and scope of the technical idea of the present invention, whereby the technical scope of the present invention will not be limited, within the scope of the technical idea of the present invention It will be appreciated that various modifications and changes can be made by those skilled in the art.

Figure 1a is a filter press in which the whole process of the present invention is carried out, the present invention relates to a filter plate (01) mounted to this filter press. Figure 1b is a simplified illustration of the entire high-pressure pressing filter plate of the present invention is mounted to the filter press in this state. Filtration part (03; Filtration Part), which is composed of the whole filter plate 01, the shoulder plate 02 attached to the fixed frame of the filter press, the diaphragm and the metal sand layered frame, and applies the temperature and pressure of the heat medium to the sludge. , Sludge supply port 15 for supplying sludge to the chamber formed by two filter plates, it is composed of a filter cloth (11) surrounding the entire filter plate and in contact with the sludge in charge of the solid-liquid separation.

Figure 2 is the main part of the high-temperature compression filter plate of the present invention, the main frame 10 located in the center of the filter plate, the interframe 20 to form a step for supplying the heating medium to the main frame, the expansion and expansion by the heating medium Shrinkage and dewatering sludge and diaphragm 30 to increase the dehydration effect by heat transfer from the heat medium to the sludge layer, metal sand layered network frame 35 to induce the flow of the dehydrated filtrate, forming the room space It is composed of an outer frame 40 and Figure 3 is an exploded side view of the separation of the overall configuration to more easily understand the configuration of the filter plate and Figure 4 is coupled to both sides of the main frame relative to the main frame 10 located in the center This is a separation diagram of each configuration.

As shown in the figure, the high-temperature pressurized filter plate according to the present invention is composed of a rectangular flat plate structure, a plurality of frames and gaskets 21, 22, 23, 24 for the airtight action between each frame, the high temperature and high pressure Consists of a diaphragm 30 is provided to improve the dewatering and drying efficiency of the supplied sludge is contracted and expanded during the heating medium supply, each configuration is a sludge supply port 15 of the predetermined size through the center, The filtrate discharge port 45 is formed in the corner portion, respectively.

3 and 4 to describe in more detail each part constituting the filter plate according to the present invention, the central portion of the filter plate is made of a metal material of a predetermined thickness and the heat medium supply pipe 13 and the discharge pipe 14 are respectively installed The main frame 10 having a plate structure for supplying and discharging the heating medium is installed, and the same structure is coupled to both sides with respect to the main frame 10. That is, an inner frame 20, which is somewhat thicker than the main frame 10, is coupled to both side edge portions of the inner frame 20 based on the main frame 10. The step can be made constant by the thickness. In addition, the outer side of the inner frame 20 is coupled to the gasket (21, 22) through which a predetermined fixing hole penetrates the edge portion, respectively, the outer side of the gasket 22 is expanded and contracted by a heating medium The fixing bolt hole 47 having the same shape as the gasket is formed through the rim so that the diaphragm 30 is coupled to the main frame 10.

The gasket (18, 21, 22, 23, 24) may be made of any one of rubber, metal, fiber, etc. excellent in heat resistance and wear resistance, the diaphragm 30 withstands the high temperature and high pressure of the heat medium and heat transfer to the sludge layer The expansion and contraction movement of the metal material or the heat medium which can be efficiently performed consists of a smooth composite material. In the case of forming a metal material, the spiral or S-shaped expansion part 32 is surface-processed on the surface thereof so as to be able to contract and expand vertically and horizontally with respect to the installation direction of the filter plate at the time of supplying the high temperature and high pressure heat medium, and the mold is unmolded in the composite material.

In addition, a sludge supply port 15 is formed at both sides of the main frame 10, that is, from the main frame 10 to the diaphragm, and at the outside of the diaphragm 30. 22 is coupled to the gasket 23 having the same structure, and the outside of the gasket 23 is coupled to prevent the adhesion of the filter cloth 11 and the diaphragm 30 to induce a smooth discharge of the dehydrated filtrate Metal sand layered frame 35 is coupled. In order to maintain airtightness, the gasket 24 may be coupled to the outer side of the metal sand layer frame 35, and an outer frame 40 having a predetermined thickness may be combined to allow the diaphragm 30 to flow from side to side. To provide an open room space, the filtrate discharge port 45 is formed at the corner of the outer frame 40, each filtrate discharge port 45 has a plurality of through holes through which a predetermined filtrate can be discharged from the inner portion of the outer frame It consists of a structure formed through each toward the outer frame. A rubber coating layer using a reinforcing rubber is formed on the edge 17 of the outer frame 40 coupled to the outer frame of the other filter plate and the flange 17 coupled to the sludge supply port 15 of the sludge supply device or another filter plate, thereby forming the entire filter plate. It is configured to solve the airtight action of and the coupling stress of each component.

In addition, Figure 5a shows an embodiment of the diaphragm provided with a high-temperature pressing filter plate of the present invention made of a metal material, Figure 5b shows an example of the diaphragm provided with a composite material. Figure 6a is shown in longitudinal section to facilitate the configuration of the filter chamber formed by the combination of the filter plate according to the present invention, Figure 6b is a heat medium is supplied to the filter plate according to the present invention to press the sludge cake located between the filter plate The expanded state of the diaphragm which simulated the state is shown by sectional drawing.

As shown in FIG. 6A, a heat medium supply pipe 13 and a heat medium discharge pipe 14 having a predetermined length penetrate into the main frame 10 positioned in the central portion of the filter plate, and between the diaphragms 30 between the two sides. A predetermined space portion is formed, and the filter cloth 11 is covered to the outside so as to surround both diaphragms 30. When the sludge is supplied through the sludge supply port 15, the sludge is filled into the filtrates between the respective filter plates, and the sludge supplied to each filtrate has a size corresponding to the eyes of the filter cloth 11, usually 10 to 30 µm or more. Particles are collected in the filter chamber, and the filtrate, which escapes the eye of the filter cloth, is discharged to the outside of the apparatus through the through hole and the filtrate outlet 45 formed at the edge of the outer frame, and the first dehydration process is completed. When the high temperature and high pressure heat medium is supplied through the heat medium supply pipe 13 after the first dehydration process is completed, as shown in FIG. 6B, the diaphragm 30 of the metal material or composite material expands to the outside and is disposed between each filter plate. The cake is squeezed and the hot diaphragm 30 is in contact with the surface of the sludge cake and instantaneous heat exchange takes place. The heat medium used for heat exchange through the compression of the diaphragm 30 is discharged through the heat medium discharge pipe 14.

As shown in FIG. 7, the sludge supply port 15 formed from the main frame 10 to the diaphragm 30 is installed at the center or side chamber of each filter plate and has a joint block 16 at the main frame 10. It is fitted to maintain the internal step to be supplied with the heat medium and is to be hermetically coupled to the diaphragm 30 by applying the gasket 18 and the flange 17.

8 shows that the filter cloth 11 and the diaphragm 30 are adhered to each other at high temperature and high pressure, and the filtrate dehydrated from the sludge does not move to the filtrate outlet 45 through the filter cloth 11. In order to prevent the phenomenon of stagnation on the surface and lowering the dewatering efficiency and the peeling efficiency of the sludge cake, the lamination network by the metal yarn or the metal fabric mixed yarn is shown in the frame. The metal sand layer is fixed only to the left and right or top and bottom portions to be mounted on the frame so as not to affect the expansion and contraction movement of the diaphragm (30). As a mounting method of the frame, Fig. 8A illustrates a method of fitting the stratification network to each frame by pins or springs to fit the frame, and fixing the stratification network to the frame by fixing the stratification network to a single connection block of length. Figure 8b shows how to do this.

In the conventional high pressure pressurized filter press, a pressure of 5 kg / cm ² is applied at the time of the primary pump pressure filtration, and the average water content is 15 kg / cm ² , the temperature is 15 ° C., and the filtration time is 2 hours at the time of the second compression filtration. About 68 ± 3% comes out,

In the case of applying the high-temperature pressurized filter plate according to the present invention, when the sludge is supplied, the supply pump pressure 5kg / cm ² acts to perform the first pump pressure filtration, and during the second compression filtration, the heat medium supply pressure 5kg / cm ² , the highest It can be seen that the average water content is greatly improved to 50 ± 3% at the temperature of 200 ° C. and the filtration time of 2hr.

That is, when the 1000kg of sewage sludge having a solid concentration of 2% is treated with a conventional filter plate, the residual moisture is about 42.5kg, the total weight is 62.5kg, but when the filter plate according to the present invention is used, the residual moisture is about 20kg, the total weight is 40kg By using the high-temperature pressurized filter plate according to the present invention can provide an excellent effect that the moisture is significantly lowered, it can significantly reduce the heat and transport costs of the subsequent process, bringing economic cost saving effect Of course, the application of high temperature to shorten the working time to improve the productivity.

In addition, the surface of the diaphragm of the metal material according to the present invention is provided with an inflated portion formed by spirals or wavy convex portions directed toward the outer side or the corner side from the center thereof, and thus the surface of the diaphragm continuously contracted and expanded during the expansion and contraction operation. The fatigue resistance is weakened to increase durability.

As described above, the filter plate according to the present invention is expanded when the mainframe and the high temperature heat medium are supplied, and the diaphragm, which is heat exchanged with the sludge cake, has excellent thermal conductivity and is made of an elastic metal or a composite material. It is possible to supply, so that the water content of sludge cake can be significantly lower than before, so that the sludge cake can be separated by self weight when disassembling the filter plate after dehydration, and it is equipped with a separate sludge cake discharge device necessary for discharging the sludge cake. Since it is not necessary to simplify the apparatus, the manufacturing cost of the filter plate and the filter press can be reduced.

Figure 1a is a filter press equipped with a filter plate according to the present invention,

Figure 1b is an overall view of the high-temperature compression filter plate mounted on the filter press according to the present invention,

Figure 2 is a schematic view of the main part of the high-pressure compression filter plate according to the present invention,

3 is a side exploded view of the high-temperature press-fit inn plate according to the present invention;

4 is an overall configuration diagram of each configuration coupled to both sides of the main frame based on the main frame in the high-temperature compression filter plate according to the present invention,

Figure 5a shows an embodiment of the diaphragm provided with a high-temperature pressing filter plate according to the invention made of a metal material, Figure 5b shows an embodiment of the diaphragm provided with a composite material, respectively,

6a is a longitudinal sectional view of the filter plate according to the invention of FIG. 1b,

6B is an exploded cross-sectional view of a diaphragm simulating a state in which a heat medium is supplied to a filter plate according to the present invention to compress a sludge cake located between the filter plates,

7 is a schematic view of a sludge supply port illustrating a method of bonding the main frame and the diaphragm for the sludge supply port,

FIG. 8 is a metal sand layered frame mounted on top of a diaphragm to facilitate the flow of dehydrated water when the diaphragm and the filter cloth are compressed.

※ Brief description of symbols for the main parts of the drawings

01: high temperature crimping Filter plate

02: shoulder plate

03: Filtration Part

10: mainframe ( Main Frame )

11: filter cloth

13: heat medium supply pipe

14: heat medium discharge pipe

15: sludge supply port

16: Joint Block

17: Holding Flange

18: Gasket

20: Inner frame ( Inner Frame )

21, 22, 23, 24: Gasket

30: Diaphragm ( Diaphragm )

32: inflation

35: Metal Sand Layer  frame ( Metal Multilayered Mesh Frame )

36: Locking Block A Type

37: Locking Block B Type

40: outer frame ( Outer Frame )

45: filtrate outlet

47: Fixing Bolt Hole

Claims (5)

A sludge supply port is formed in the center, and a filtrate discharge port is provided in the inner corner, and a filter cloth is covered on the outside to separate the sludge supplied to the chambers between the filter plates in a state where a plurality of the sheets are in close contact with each other. A filter plate for hot pressing filter press configured to be able to secondaryly dewater and dry the sludge cake by a heat medium supplied from the means; The filter plate is made of a thin metal or composite material and the main frame is supplied with a high-temperature heating medium; An inner frame installed at an edge of the main frame to maintain a step from both sides of the main frame; A sludge supply port installed at the center of the filter plate or at the side of the filter plate to supply sludge between the filter chambers formed of two filter plates; A heat medium supply pipe and a discharge pipe connected to the main frame for discharging the heat medium supplied or heat-exchanged from the heat medium supply means; A diaphragm coupled to both inner frames and a diaphragm installed on both upper surfaces of the gasket, which is made of a metal or a composite material that can expand or contract under pressure when a heat medium is supplied or discharged; Located in the upper diaphragm, the diaphragm and the filter cloth are adhered to each other when the diaphragm is expanded, so that the dehydrated water can not move to the filtrate outlet. ; Coupled with the main frame at the top of each diaphragm to form a chamber chamber (Chamber) of a constant height to the outside of the diaphragm, the filtrate discharge port is provided in the inner corner and the metal four-layer network frame is installed on the diaphragm upper surface Hot pressing filter plate comprising a metal outer frame coupled to the. The method of claim 1, A rubber or composite coating layer having a predetermined thickness is formed to improve the tightness of the entire filter plate to the outside of the outer frame, and when the diaphragm is a metal material, the stress generated by expansion or contraction by a high temperature and high pressure heating medium is smooth. It is molded (eg spiral, S-shaped) so that it can be eliminated so that the high temperature compression filter plate characterized in that using a composite material. The method of claim 2, The sludge supply port formed in the compressed filter plate is connected to the diaphragm in the main frame equipped with a joint block, and the bonding method is sealed with a gasket and the uppermost compressed filter plate is joined using a flange. The material of the filter cloth installed in the filter plate of the existing filter press is stretched under high temperature and high pressure operating conditions and leads to filtration incapacity, so that the heat-resistant fiber and metal yarn are woven at a predetermined ratio for durability. Hot press filter plate with filter cloth. The filter cloth and the diaphragm are adhered when the filter press is pressed at high pressure so that the water passing through the filter cloth does not move to the filtrate outlet and does not affect the expansion and contraction movement of the diaphragm in order to prevent the phenomenon of stagnation on the diaphragm surface. A high-temperature pressurized filter plate characterized by the formation of a stratified network frame made of metal yarns or metal fabric blend yarns, which are flexible and smoothly move water between the diaphragm and filter cloth fixed to the connection block by pins or springs.

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