KR102245839B1 - Tube Type Thermal Filter Plate, Thermal Filter Press Dewatering Device with Tube type Thermal Filter Plate and Dewatering Method thereof - Google Patents

Abstract

The present invention provides a filter plate for a heat filter press dewatering apparatus to which a filter cloth is coupled, comprising: a sealing edge portion, which is an edge region in contact with an adjacent filter plate by pressure; Including a filtering unit for filtering the supplied slurry by being formed indentation than the sealing edge portion; characterized in that the filtering unit includes a plurality of square pipes spaced apart to support the filter cloth and allow hot water of a set temperature to pass through. .
Therefore, when hot water is used as a heating medium for a heating filter plate having a relatively large size, it is possible to improve heat transfer efficiency and improve economic efficiency including operation cost. An apparatus and a method of dehydrating the same can be provided.

Description

Tube Type Thermal Filter Plate, Thermal Filter Press Dewatering Device with Tube Type Thermal Filter Plate and Dewatering Method thereof

The present invention relates to a tubular heating filter plate, a thermal filter press dehydration apparatus to which a tubular heating filter plate is applied, and a dehydration method thereof.In particular, hot water is used as a medium for heating a filter plate having a relatively large size, and accordingly, the heating filter plate is formed in a tubular shape. It relates to an improved tubular heating filter plate, a heat filter press dehydration apparatus to which a tubular heating filter plate is applied, and a dewatering method thereof.

Fluidized sludge in which solids and liquids are mixed, mainly generated during manufacturing or wastewater treatment in Korea, is a process (industrial) sludge generated in industrial sites such as petrochemical, steel mills, salt and pigment processes, sewage terminal treatment plants and water purification plants. It can be broadly classified into water-based sludge generated in the water and livestock manure sludge such as cow manure, pig manure, and poultry manure.

When each of these sludges are subdivided, there are more than about 50 types, and the dewatering characteristics of each sludge appear variously. The most important factor among the factors affecting dehydration is the content of organic and inorganic substances contained in the sludge, and sludge with higher organic matter tends to be difficult to dehydrate and tend to be dehydrated. That is, the sludge in the manufacturing process is easy to dewater because the organic matter content (20 wt%) is low, but the aqueous sludge and livestock manure sludge have very high organic matter content (40-60 wt%), and dehydration is very difficult.

Currently, most of the dehydration methods developed and applied at home and abroad are mechanical dehydration.

In the (Mechanical Filtration) method, these dewatering devices include a filter press, a belt press, a vacuum dewatering device, and a centrifugal type decanter. Existing dewatering devices such as filter presses, belt presses, and vacuum dewatering devices are dewatering that separates solids and liquids by applying a mechanical force (vacuum pressure, pressing force, etc.) to the sludge layer.This dewatering method is contained in the sludge. It is effective for dewatering process sludge with a high content of inorganic matter among organic/inorganic materials, but it is not suitable for dehydration of water and sewage sludge treatment process and livestock manure sludge with high content of organic matter. This is due to the characteristics of the pore-forming mechanism of the sludge layer and the dehydration mechanism having free water and surface water distributed on the surface of the particles in the sludge.

That is, process sludge with a large amount of inorganic substances has a characteristic of having a large amount of free water (water that is easily dehydrated according to a pressing pressure) and relatively low surface water (water that is difficult to dehydrate due to a pressing pressure). In addition, if the distribution of free water is large, the formation of voids is easy, so that the capillary tube is well formed, and water is easily discharged from the cake layer. This is the reason why the sand drains water well because of this principle. However, water and sewage sludge treatment processes and livestock manure sludge, which are organic sludges, have a large number of surfaces, making it difficult to form pores, making it difficult to form capillaries in the sludge layer, which makes dehydration difficult. When dewatering with a mechanical dewatering device, the moisture content of the cake formed in the case of process sludge is about 60 wt%, whereas the moisture content of the cake formed in the case of water and sewage sludge treatment process and livestock manure sludge is 80 to 90 wt%. If dehydrated cakes with high moisture content are produced as described above, transportation costs are high during conventional treatment by dumping and landfilling at sea, and economic and environmental losses due to the generation of leachate occur. For effective treatment of dehydrated cakes, it is most important to treat them by recycling methods such as organic fertilizers, cover materials, and lightweight aggregates. Therefore, it is desirable to produce a cake having a lower moisture content in consideration of environment, economy, recyclability, and the like.

Accordingly, the applicant of the present invention has developed a device that performs both mechanical dehydration treatment and thermal dehydration method in order to produce a sludge cake having a low moisture content.

A hot plate having a sludge supply part was inserted between the manbrain plates of the mechanical filter press dehydration device, and thermal energy was applied to the hot plate using steam as a heat medium, so that dehydration by pump pressure and dehydration by steam were simultaneously performed.

However, in the case of the pre-application method, when the heat medium introduced into the heat plate is steam having heat energy of about 120°C at a pressure of 1 kg/cm2, the heat energy is transferred to the surface of the heat plate and the discharged heat medium is still at a pressure of 1 kg/cm2. Since it is steam having heat energy of about 112°C, it is difficult to invest in equipment and control because a separate condenser is required to treat the discharged steam, and above all, waste of energy to phase-convert the steam back to water is a big problem. Emerged.

This is because the size of the hot plate is relatively small for the steam to transfer sufficient heat energy to the hot plate, and the time required to pass through the internal sludge supply unit is also short.

However, the temperature of the sludge required for dehydration of the sludge is 40 ℃ ~ 80 ℃ is sufficient, and if it exceeds 80 ℃, rather than drying due to overheating may proceed, such a small energy consumption can be said to be essential. This is because the concepts of dehydration and drying must be clearly distinguished in the treatment of sludge, because a certain amount of moisture must be contained in order for the sludge to exist in a cake state (dewatering area). In other words, the dry powder state (dry area) without moisture in the sludge may cause problems such as scattering of the powder, difficulty in transport, and difficulty in disposal, which may cause new environmental pollution. Therefore, the sludge is a solid containing moisture. It must be treated in a state, that is, in a cake state, so that not only the treatment but also the disposal range can be expanded to the area of recycling.

Therefore, it is preferable to heat and dehydrate the non-dehydrated sludge, which is difficult to dewater, to be heated and dehydrated to contain a certain amount of moisture and to optimize the cost of operation, and to provide a heating filter plate for this purpose. desirable.

[references]

Patent Publication No. 10-2004-0030022 (published on Apr. 08, 2004)

Registered Patent Publication No. 10-0625040 (announced on September 11, 2006)

Registered Patent Publication No. 10-0583347 (announced on 2006.06.18.)

It is an object of the present invention to improve heat transfer efficiency when hot water is used as a heating medium for a heating filter plate having a relatively large size, and a tube-type heating filter plate and a tube-type heating filter plate that can improve economic efficiency including operation cost are applied. It is to provide a heat filter press dehydration apparatus and a dehydration method thereof.

In addition, another object of the present invention is that when hot water is used as a heating medium for a heating filter plate having a relatively large size, a tube-type heating filter plate capable of preventing deformation according to heat transfer efficiency and size, and a heat filter press to which a tube-type heating filter plate is applied. It is to provide a dehydration apparatus and a dehydration method thereof.

An object of the present invention is a filter plate for a heat filter press dewatering apparatus to which a filter cloth is coupled, comprising: a sealing edge portion, which is an edge region in contact with an adjacent filter plate by pressure; Including; a filtration unit for filtering the supplied slurry by being recessed than the sealing edge unit, wherein the filtration unit includes a plurality of square pipes spaced apart to support the filter cloth and allow hot water of a set temperature to pass through. It is achieved by means of a heated filter plate.

In addition, it is preferable that the hot water circulating the filtering unit is heated and circulated by electricity or steam.

In addition, the sealing edge portion, an edge frame that forms an edge and supports the filtering portion disposed in the center, a heat source supply member provided to supply hot water to the filtering portion on one side of the edge frame, and the other side of the edge frame. And a heat source return member provided so as to be guided to discharge the sealing edge by collecting the hot water passing through the filtering unit, wherein the heat source supply member or the heat source return member includes hot water passing through the plurality of filtering units to each of the filtering units. It is preferable that a distribution plate is provided so that it is uniformly distributed and no back pressure is formed.

In addition, the sealing edge portion, an edge frame forming an exterior, a tube sheet coupled to the edge frame to support each of the square pipes, and the edge of the edge frame so that the filtrate filtered by the filtration unit is discharged. It is preferable to include a filtrate discharge part coupled to the region, and a filtrate channel forming member coupled to the edge frame so that the filtrate filtered between the tube sheet and the square pipe is guided to the filtrate discharge part.

In addition, a filtrate supply member for supplying a liquid for filtration is included in the center of the filtration unit, and hot water supplied through the square pipe can be vertically communicated in a region where the square pipe and the filtrate supply member are coupled. It is preferable that a heat source passage space is formed.

On the other hand, an object of the present invention is a filter press dewatering apparatus comprising a filter plate to which a filter cloth is bonded, comprising: a press body; A plurality of square pipes supported by the press body and spaced apart to support the sealing edge portion, which is an edge region in contact with the adjacent filter plate by pressure, and the filter cloth for filtering the supplied slurry by being recessed from the sealing edge portion A heating filter plate including a filtration unit comprising a; A heat source supply unit provided to supply hot water having a temperature set to the filter plate, but is also achieved by a dehydration device, characterized in that the hot water supplied from the heat source supply unit circulates the square pipe.

On the other hand, the object of the present invention is the (1) process of generating hot water in a heat source supply unit using electricity or steam; A plurality of square pipes that are supported by the press body and are spaced apart to support the filter cloth, which is an edge region that is in contact with an adjacent filter plate by pressure, and a filter cloth that is formed indentation than the sealing edge and filters the supplied slurry. (2) circulating hot water in the heat source supply unit at a temperature set in the heating filter plate including the filtering unit including; (3) step of supplying the slurry to be dehydrated to the filter plate including the heated filter plate, but it is also achieved by a dehydration method characterized in that the step (2) is performed in the step (3).

According to the present invention, when hot water is used as a heating medium for a heating filter plate having a relatively large size, heat transfer efficiency can be improved and a tube-type heating filter plate capable of improving economic efficiency including operation cost, and heat with a tube-type heating filter plate are applied. A filter press dehydration apparatus and a dehydration method thereof can be provided.

In addition, when hot water is used as a heating medium for a heating filter plate having a relatively large size, a tube-type heating filter plate that can prevent deformation according to heat transfer efficiency and size, a heat filter press dehydration device with a tube-type heating filter plate, and a dehydration method thereof. Can provide.

1 is a conceptual diagram of a thermal filter press dehydration apparatus and a dehydration method thereof according to an embodiment of the present invention,
2 is a cross-sectional view of a filter plate of a dehydration device and a perspective view of a tubular heating filter plate;
3A is a partial exploded perspective view, an enlarged perspective view and a side view of a main part of the tubular heating filter plate,
3B is a view partially showing a front view and an enlarged view of the tubular heating filter plate and showing the flow of hot water;
4 is a view partially showing a front view and an enlarged view of the tubular heating filter plate and showing the flow of the filtrate;
Figure 5 is a conceptual diagram comparing the heating medium of the prior art and the present technology,
6A and 6B are graphs showing a change in filtrate with time, temperature change of the filter plate, and a photograph of the formed cake and the filter cloth after separating the cake when the medium heating the heating filter plate is steam according to the prior art.
7A and 7B are graphs showing a change in temperature of a filtrate according to time, a change in temperature of the filter plate, and a photograph of a formed cake and a filter cloth after separating the cake when the medium heating the heating filter plate is hot water according to the present invention.

With reference to FIGS. 1 to 7B below, a heat filter press dehydration device (hereinafter referred to as'dehydration device') to which a tubular heating filter plate and a tubular heat filter plate are applied according to an embodiment of the present invention will be described in detail. Then it looks like this:

1 is a conceptual diagram of a thermal filter press dehydration apparatus and a dehydration method thereof according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a filter plate of a dehydration apparatus and a perspective view of a tubular heating filter plate, and FIG. 3A is a partial exploded view of a tubular heating filter plate. It is a perspective view, an enlarged perspective view and a side view of the main part, and FIG. 3B is a view showing the flow of hot water and partially showing a front view and an enlarged view of the tubular heating filter plate, and FIG. 4 is a front view and an enlarged view of the tubular heating filter plate. It is a diagram showing the flow of the filtrate, and FIG. 5 is a conceptual diagram comparing the heating medium of the prior art and the present technology, and FIGS. 6A and 6B are changes in time when the medium heating the heating filter plate is conventional steam. The filtrate according to the graph showing the temperature change of the filter plate, and a photograph of the formed cake and the filter cloth after separating the cake, FIGS. 7A and 7B are the filtrate according to the change of time when the medium heating the heated filter plate is hot water according to the present invention, It is a graph showing the temperature change of the filter plate and a photograph of the formed cake and the filter cloth after separating the cake.

Hereinafter, for convenience of explanation, with reference to FIGS. 1 and 2, the filter plates 2000 and 3000 are supported by the press body 1100 of the dewatering apparatus 1000, and the solid content is in the'center' of the filter plate. It is provided with a filtrate supply member 2130 into which the slurry to be dehydrated is introduced, handles 2400 are attached to the'left and right', and the heat source supply member 2330 through which hot water is supplied or introduced is located. The place where the heat source return member 2350, where hot water is recovered by passing through the filtration chamber tube 2110 made of a square pipe, is located will be referred to as'upper side'.

Dehydration device 1000 according to an embodiment of the present invention. 1 to 4, the press body 1100 supporting various configurations and supported on the floor of a building, etc., and the sealing supported by the press body 1100 and in close contact with each other by pressurization of a hydraulic cylinder, etc. A filter plate having a filter part 2100 formed in the central area to receive and dehydrate slurry, which is a fluid containing the solid content to be dehydrated with the branch part 2300 (unless otherwise specified, the menbrain type filter plate 3000 and the tubular heating filter plate (2000, a concept including a'heated filter plate') and a filter cloth supported by the filter plates (2000, 3000) to collect solids and pass the relatively clean filtrate excluding the solids through the filtrate outlet (2380). 1200).

The dehydration device 1000 includes a slurry tank 2610 for storing slurry, a slurry supply pump 2630 for supplying the slurry stored in the slurry tank 2610 by pressurizing the slurry stored in the filter plates 2000 and 3000 to enable dehydration. According to the pressure of the slurry supply pump 2630, the cake 1400 formed by dehydration is additionally compressed by supplying a medium containing air or water to the menbrain (not shown) of the menbrain type filter plate 3000 (2750) and a compression unit 2700 including a compression medium member (2730, water tank, air tank, etc.) for storing air or water, and moisture remaining inside the formed check 1400, filtrate, slurry piping, etc. It may further include an air blower (2800) supplying air or the like to remove the.

The press body 1100 is firmly provided to support the above-described configuration of the dewatering device 1000 and pipes, and is supported on the floor of a building, a steel structure, and the like.

The filter cloth 1200 collects and filters solids from the supplied slurry to generate a cake by the pressure of the slurry supply pump 2630, and heat transfer and compression means of the (tubular) heated filter plate 2000 to the supplied slurry and cake ( 2750), the cake is firmly supported while moisture is further removed from the cake. The filter cloth 1200 has a shape corresponding to the filtrate supply hole 2133 through which the slurry is supplied and the filtrate outlet 2380 through which the filtrate is discharged.

The filter cloth 1200 reduces the filtration efficiency by blocking the pores of the filter cloth 1200 due to compression of the cake 1400, etc., so after separating the cake 1400 from the filter cloth 1200, the filter cloth is automatically reduced to high pressure. It is preferable to be washed by the filter cloth washing device 1300 to be washed. The washing of the filter cloth 1200 may be performed every cycle or once every several cycles, and such a washing cycle may be set by a controller (not shown).

Hereinafter, as an embodiment of the filter plates 2000 and 3000, the sizes of the filter plates 2000 and 3000 are somewhat larger and have a width and a height of 1500 mm, respectively.

The heating filter plate 2000 includes a filtration unit 2100 composed of a plurality of square pipes arranged at a set pitch spaced apart so that solids are collected from the supplied slurry and liquid excluding the solids can escape, and the filtration unit 2100. A sealing edge part that seals the slurry, filtrate, and cake supplied to the filter unit 2100 by being in close contact with the filter plates 2000 and 3000 adjacent to the borders by the hydraulic cylinder so that they do not flow out of the filter plates 2000 and 3000 ( 2300).

The filtration unit 2100 fills the space of the edge frame 2360 without flowing hot water to the left and right sides of the filtration chamber tube 2110 and the filtration chamber tube 2110, which are a plurality of square pipes provided to circulate hot water therein. The space is formed so that the cake 1400 is formed between the spacers 2114 and 2115 and the filtering unit 2100 of the filter plates 2000 and 3000 adjacent to each other through the center. To prevent the formation of a space in which a cake is formed due to pulsation of the filtrate supply member 2130, which is pressurized by 2630 to supply the slurry, and the pulsation of the slurry supply pump 2630 or deformation of the filter unit 2100. It is preferable to have a boss member 2150 protruding and coupled to the plate surface of the filtration chamber tube 2110.

In the filtration chamber tube 2110, a square pipe is arranged at a pitch set in the vertical direction, which is the vertical direction of the filter plate, as an example, and hot water is circulated inside the square pipe, and the filtrate passing through the filter cloth may flow through the square pipes. . The square pipe supports the filter cloth 1200 and at the same time forms a filtering area in which the supplied slurry can be dehydrated, and also performs a function of transferring the thermal energy of hot water flowing therein to the sludge and cake. That is, it may have the advantage of being able to directly transfer heat to the slurry or cake with the filter cloth interposed therebetween.

The filtrate supply member 2130 located in the center of the heating filter plate 2000 forms a space outside the filtrate supply hole 2133 and the filtrate supply hole 2133 through which the slurry supplied to the center passes. A heat source passage space 2135, which is a space formed so that hot water is supplied by a square pipe passing through the supply member 2130 in the vertical direction, and a center tube sheet that is coupled to a square pipe passing through the filtrate supply member 2130 through welding, etc. (2137) is included.

Accordingly, the filtrate supply member 2130 may be supported by a square pipe at the center of the filtering unit 2100 to allow the supplied slurry to pass, and at the same time allow hot water to flow in the vertical direction through the combined square pipe.

The sealing edge portion 2300 includes an edge frame 2360 forming an exterior of the filtration unit 2100, and as shown in FIGS. 2 to 3B, each square pipe constituting the filtration chamber tube 2110 A tube sheet 2310 coupled with the edge frame 2360 to support each square pipe through welding, etc. to prevent the hot water circulating inside from flowing to other places, and a heat source supply member 2330 for supplying hot water through each square pipe. ), and a heat source return member (2350) for receiving returnable hot water that has passed through each square pipe, a filtrate outlet (2380) provided at the edge of the rim to discharge the filtrate, and filtration flowing between the square pipes It includes a filtrate channel forming member 2320 that is spaced inward from the tube sheet 2310 to guide the liquid to the filtrate outlet 2380 and coupled between the square pipe and the edge frame 2360.

The heat source supply member 2330 supplies a heat source including hot water through a square pipe of the filtering unit 2100, and a heat source supply cushion header 2331, which is a space in which the supplied hot water is formed and accommodated in a lower horizontal direction, A heat source supply tube header (2335), a heat source supply cushion header (2331) and a heat source supply tube header (2335) in communication with each square pipe by receiving hot water between the tube sheet (2310) coupled with the square pipe and the heat source supply distribution plate (2333) It consists of a heat source supply distribution plate (2333) provided between (2335) and passing through a distribution hole (not shown). Here, the heat source supply and distribution plate 2333 allows the hot water supplied to each square pipe to flow uniformly and prevents back pressure from being formed in the supplied hot water or the hot water passing through the square pipe. The tube sheet 2310 is provided with a tube through hole 2313 through which a square pipe can pass and protrude. Accordingly, the protruding square pipe may be welded to the tube sheet 2310 while maintaining airtightness.

The heat source return member 2350 serves to guide the hot water that has passed through the square pipe to be recovered or returned to the heat source supply unit 2500, and has a configuration corresponding to each configuration of the heat source supply member 2330. The heat source return member 2350 includes a heat source return tube header 2351 in communication with each square pipe at a downstream of the upper tube sheet 2310 so that hot water passing through each square pipe is received, and a heat source return pipe 2553 with hot water. ), and a heat source return distribution plate 2353 having a distribution hole 2353a penetrating between the heat source return tube header 2351 and the heat source return guide header 2355. Of course, it goes without saying that the distribution holes 2353a are provided in an appropriate size and number to prevent back pressure from circulating hot water.

In the sealing edge part 2300 of the heating filter plate 2000, a heating filter plate 2000 made of a steel material including stainless steel is compressed with a menbrain type filter plate 3000 made of PP, etc. to improve the sealing function. It is preferable that a lining member 2370 lined in a'C' shape with a thickness set of rubber including a further includes.

The filtrate outlet 2380 is provided with a filtrate through hole 2383 formed therethrough so that the filtrate flowing into the space between the edge frames 2360 can flow to the filtrate outlet 2380.

The heat source supply unit 2500 includes an electric heater capable of heating purified water or clean water to a set temperature, a heat source forming member 2510 including steam, and the like, and a heat source storage member 2520 for storing and receiving heated hot water. And, a heat source pressurizing member 2530 including a pump that pressurizes the hot water received and stored in the heat source storage member 2520 to circulate to the heat source storage member 2520 through the heating filter plate 2000, and the press body 1100 ) Is connected to the side of the heat source supply header 2540 to supply hot water to each heating filter plate 2000, and communicates with the heat source supply header 2540 and each heating filter plate 2000 to transfer hot water to each heating filter plate 2000. It is preferable that it is made of a flexible tube-shaped heat source supply pipe 2543 having the flexibility to supply. Since the filter plates (2000, 3000) supported by the press body (1100) move along the press body (1100) when the cake is separated, the heat source supply pipe (2543) and the heat source return pipe (2553) are provided with flexible flexible tubes. desirable.

In addition, each heating filter plate 2000 communicates with the heat source return guide header 2355 to recover or return hot water to the heat source supply unit 2500 to protrude to the outside of the heating filter plate 2000, and each heat source A heat source return header 2550 is provided in communication with the return pipe 2553 and arranged on the side of the press body 1100 in the shape of a long rod to guide the returned hot water to be returned or returned to the heat source supply unit 2500.

A heat source supply pipe (2560), which is a pipe that communicates between the heat source supply unit (2500) and the heat source supply header (2540) so that it can be supplied to the hot water rule heating filter plate (2000), and between the heat source return header (2550) and the heat source supply unit (2500). A heat source return pipe 2570 is provided, which is a pipe for returning or recovering hot water from the pipe.

In the prior art, steam was supplied to the heating filter plate 2000 to the heating filter plate 2000 having this structure, but hot water is supplied to the heating filter plate 2000 in the present invention.

Here, it may be provided as an electric boiler integrally including a heat source forming member 2510 and a heat source storage member 2520 for generating and storing hot water, and a heat source pressing member 2530 if necessary.

The dehydration apparatus 1000 is not described, but includes a control unit capable of automatically or manually detecting, calculating, controlling, and operating the above-described components. Of course, this control unit includes various automatic valves, flow meters, and temperature sensors.

In addition, the present applicant has also applied for a case where steam is used for a hot plate in the prior art (hereinafter referred to as'EXP-PS-7'), and hot water is used for the heating filter plate 2000 according to the prior art and the present invention. In order to invent the case (hereinafter referred to as'EXP-PS-8') and compare both inventions or technologies, the following test frame was performed.

6A is a graph showing changes in the amount and temperature of the discharged filtrate over time of'EXP-PS-7'. About 35kg of filtrate was discharged and the final dehydration cake moisture content was analyzed to be 44.5wt%. The temperature of the hot plate and the sludge reached 85±5℃ and the temperature of the sludge reached 70±℃ after 30 minutes after applying the initial heat of dehydration to maintain an equilibrium state. 6B is a photograph showing the shape of the cake and the filter cloth after dehydration. The peeling phenomenon of the cake was very good so as not to require a washing process, and the cake also had a low moisture content and a very high filling rate.

Figure 7a shows the results of the experiment for'EXP-PS-8', the dehydration filtrate was discharged about 28kg, the moisture content of the dehydration cake was analyzed to be 54.0wt%. The temperature of the heated filter plate 2000, which was 70±5° C. before dehydration, was lowered to 40° C. as sludge was introduced and dehydration started, and after 20 minutes, it rose to 70±5° C. to maintain an equilibrium state. The temperature of the sludge gradually increased from 20℃ at the beginning of dehydration and increased to 25℃ at the end of dehydration. In other words, the higher the temperature of the sludge during dehydration, the higher the dehydration rate, but it is a relationship between the increase in energy consumption and the interest rate.

Through this experiment, even if a slight temperature of the sludge is applied, it is analyzed that there is an effect of thermal dehydration. Compared with the experimental results of EXP-PS-7, the moisture content of the final dewatering cake is high, but considering the aspect that the temperature applied to the sludge layer is very low, it can be judged that the dehydration effect is rather increased. 7B is a photograph showing the shape of the cake and the filter cloth after dehydration, and it was also investigated that the sludge peeling phenomenon was very good as the result of EXP-PS-7. As such, the reason why the sludge peeling phenomenon is good in thermal dehydration is analyzed to be due to the increased fluidity of the filtrate in the sludge and the easy formation of pores in the cake according to the thermal dehydration theory.

[Table 1] and [Table 2] compare and analyze the results of EXP-PS-7 and EXP-PS-8. The final cake moisture content is 44.5wt% and 54.0wt%, respectively, and the dehydration rate is 1.554 DS kg/ It was analyzed as ^{m 2} ㆍhr and 1.248 DS kg/m ^{2 ㆍhr.} And the steam condensate was 15.333 kg and 14.470 kg, respectively. As a result of such a comparative experiment, when the hot plate is heated using steam, the dehydration rate increases, but the consumed steam tends to increase, thereby increasing the operating cost. On the other hand, in the case of dehydration using hot water, the dehydration rate was relatively slightly decreased, but energy consumption decreased because dehydration was performed while applying a temperature of about 25 ℃ to the sludge layer. Therefore, there are various advantages and disadvantages of each of the two systems depending on the method of heating the heating plate using steam or the heating filter plate 2000 using hot water, but according to the results of this study, it is more effective to use hot water if safety and economics are considered. Is judged to be.

Water Treatment Sludge Item EXP-PS-7
(Steam) EXP-PS-8
(Hot Water) Specification Filter Press
Specification Filter Press Size L 470 mm × W 470 mm Filter Area 0.58m2/ch. Filter Volume 6.30 dm3/ch. Filter Cloth PP 1800 Denier Filter Plate Type Mixed Pack Chamber Thickness 24 mm Chamber Quantity 2 EA Heating Plate Material Stainless Steel(SUS 304) Item Unit Value Raw Sludge Initial Water Content wt% 94.6 96.4 Organic Content wt% 22.4 33.8 pH - 7.00 6.55 Operating
Condition Dewatering Time min 150 100 Feeding Pressure kgf/cm ² 5 5 Feeding Time min 120 80 Squeezing Pressure kgf/cm ² 15 15 Squeezing Time min 20 15 Air Blowing Pressure kgf/cm ² 2 4 Air Blowing Time min 10 5 Vacuum Pressure mmHg 250 - Vacuumizing Time min 140 - Steam Pressure kgf/cm ² 1.0 1.0 Heating Time by Steam min 150 100 Sludge Temperature ℃ 70±5 20±5 Heating Plate Temperature ℃ 85±5 70±5 Steam Temperature ℃ - 100±5 Heated Water Temperature ℃ - 95±5

Water Treatment Sludge Item Unit Value EXP-PS-7
(Steam) EXP-PS-8
(Hot Water) Results Filtration kg 34.555 28.185 Filtration from Squeezing kg 2.540 3.250 Filtration from Air Blowing kg 0.280 0.640 Filtration from Drip kg 0 0 Condensate kg 15.333 14.470 Wet Cake Weight kg 4.060 2.625 Wet Cake Thickness mm 25.0 16.0 Final Water Content wt% 44.5 54.0 Filtration Velocity DS kg/m ² ㆍhr 1.554 1.248 Sludge
DS kg/m ² ㆍhr 28.576 35.897 Dry Solid in Circulation wt% 5.439 3.478

The operation process of the dehydration apparatus 1000 according to the present invention having such a configuration will be described in detail with reference to FIGS. 1 to 4 as follows.

The dehydration process or the dehydration method of the dehydration apparatus 1000 includes (1) the process of generating hot water in the heat source supply unit 2500 using electricity or steam; The sealing edge portion 2300, which is an edge region supported by the press body 1100 and in contact with the neighboring filter plates 2000 and 3000, and the slurry supplied by being recessed than the sealing edge portion 2300 are filtered. At a temperature set in the heated filter plate 2000 including a filter unit 2100 including a filter chamber tube 2110 made of a plurality of square pipes spaced apart to support the filter cloth 1200 (collecting solids in the sludge). (2) circulating hot water in the heat source supply unit 2500; The process (3) of supplying the slurry to be dehydrated to the filter plate including the heating filter plate 2000: is included, and the process (2) is performed during the process (3).

In this process, hot water is heated in the heat source forming member 2510 and stored and accommodated in the heat source storage member 2520, and the heat source pressurizing member 2530-heat source supply pipe 2560-heat source supply header 2540-heat source supply pipe ( It is supplied to the heating filter plate 2000 through the 2543). The hot water supplied to the heating filter plate 2000 is a heat source supply cushion header (2331) on the lower side-a heat source supply distribution plate (2333) having a plurality of distribution holes-a heat source supply tube header (2335)-a filtration chamber tube formed of a square pipe ( 2110)-Heat source return tube header (2351)-Heat source return distribution plate (2353) having a plurality of distribution holes-Heat source return pipe (2553) coupled to the side of the heating filter plate (2000) through the heat source return guide header (2355) ) Flows to the heat source return header 2550 (see FIGS. 3A to 3B).

In this process, the distribution plates 2333 and 2353 that control and distribute the hot water flow uniformly through the distribution hole into each square pipe, and the back pressure is not formed. Thermal energy may be induced to be uniform and uniform over the entire surface area of the filtering unit 2100.

The hot water recovered or returned from the heat source return header 2550 is recovered to the heat source supply unit 2500 through the heat source return pipe 2570, and heated to a temperature set by the heat source forming member 2510 again, and then the heating filter plate 2000 Repeat the cycle through.

The temperature of the heating filter plate 2000 and the slurry is increased by the circulation of the hot water, and the dehydration efficiency of the slurry, which is difficult to dewater, may be increased by the increase in temperature.

On the other hand, the slurry stored in the slurry tank 2610 is supplied to the filtrate supply hole 2133 of the filtrate supply member 2130 through the slurry supply pump 2630, and is pressurized into the space formed between the filter plates 2000 and 3000. As a result, the solid content in the slurry is collected by the filter cloth 1200 and the solid content is removed so that the relatively clean and clear filtrate flows through the square pipes, as shown in FIG. 4, the edge frame, which is a space created by the filtrate channel forming member 2320, It is guided through the space between the tube sheets 2310 and flows to the filtrate outlet 2380 through the filtrate through hole 2383 formed therethrough. The filtrate guided to the filtrate outlet 2380 is discharged to the outside of the press body 1100.

Accordingly, according to the present invention, when hot water is used as a heating medium for a heating filter plate having a relatively large size, a tube-type heating filter plate and a tube-type heating filter plate that can improve heat transfer efficiency and economic efficiency including operation cost are provided. It is possible to provide an applied thermal filter press dewatering apparatus and a dewatering method thereof.

In addition, when hot water is used as a heating medium for a heating filter plate having a relatively large size, a tube-type heating filter plate that can prevent deformation according to heat transfer efficiency and size, a heat filter press dehydration device with a tube-type heating filter plate, and a dehydration method thereof. Can provide.

Here, although several embodiments of the present invention have been illustrated and described, those skilled in the art having ordinary knowledge in the technical field to which the present invention pertains will be able to see that the present embodiments can be modified without departing from the principles or spirit of the present invention. will be. The scope of the invention will be determined by the appended claims and their equivalents.

1000: dehydration device 1100: press body
1200: filter cloth 1300: filter cloth cleaning device
1400: cake
2000: heating filter plate 2100: filter unit
2110: filtration chamber tube 2114, 2115: spacer
2130: filtrate supply member 2133: filtrate supply hole
2135: heat source passage space 2137: center tube sheet
2150: boss member
2300: sealing edge
2310: tube sheet 2320: filtrate flow channel forming member
2330: heat source supply member 2331: heat source supply cushion header
2333: heat source supply distribution plate 2335: heat source supply tube header
2350: heat source return member 2351: heat source return tube header
2353: heat source return distribution plate 2353a: distribution hole
2355: Heat source return guide header
2360: edge frame 2370: lining member
2380: filtrate outlet 2383: filtrate through hole
2400: handle 2500: heat source supply
2510: heat source forming member 2520: heat source storage member
2530: heat source pressing member 2540: heat source supply header
2543: heat source supply pipe 2550: heat source return header
2553: heat source return pipe 2560: heat source supply pipe
2570: Heat source return piping
2610: slurry tank 2630: slurry supply pump
2700: crimping unit 2730: crimping medium member
2750: crimping means 2800: air blower
3000: Menbrain type filter plate

Claims (10)

In the filter plate for a heat filter press dehydration device to which the filter cloth is bonded,
A sealing edge portion that is an edge region in contact with an adjacent filter plate by pressure;
Including; a filtering unit for filtering the supplied slurry is formed indentation than the sealing edge portion,
The filtering unit is characterized in that it includes a plurality of square pipes spaced apart to support the filter cloth and allow hot water of a set temperature to pass,
The sealing edge portion,
An edge frame that forms an edge and supports the filtering unit disposed in the center,
A heat source supply member provided at one side of the edge frame to supply hot water to the filtering unit,
And a heat source return member provided to be guided to discharge the sealing edge by collecting hot water that has passed through the filtering unit on the other side of the edge frame,
And a distribution plate provided in the heat source supply member or the heat source return member so that hot water passing through the plurality of filtering units is uniformly distributed to each of the filtering units and a back pressure is not formed. The method of claim 1,
Heated filter plate, characterized in that the hot water circulating the filter unit is heated by electricity or steam to be circulated. delete In the filter plate for a heat filter press dehydration device to which the filter cloth is bonded,
A sealing edge portion that is an edge region in contact with an adjacent filter plate by pressure;
Including; a filtering unit for filtering the supplied slurry is formed indentation than the sealing edge portion,
The filtering unit includes a plurality of square pipes spaced apart from each other to support the filter cloth and allow hot water of a set temperature to pass,
The sealing edge portion includes an edge frame forming an exterior, a tube sheet coupled to the edge frame to support each of the square pipes, and a corner region of the edge frame so that the filtrate filtered by the filtering portion is discharged. Including a combined filtrate outlet,
And a filtrate channel forming member coupled to the edge frame so that the filtrate filtered between the tube sheet and the square pipe is guided to the filtrate discharge unit. The method of claim 1 or 4,
A filtrate supply member through which a liquid for the purpose of filtration is supplied is included in the center of the filtration unit,
A heating filter plate, characterized in that a heat source passage space through which hot water supplied through the square pipe can be vertically communicated is formed in a region where the square pipe and the filtrate supply member are coupled. In the filter press dehydration apparatus comprising a filter plate to which a filter cloth is bonded,
A press body;
A plurality of square pipes supported by the press body and spaced apart to support the sealing edge portion, which is an edge region in contact with the adjacent filter plate by pressure, and the filter cloth for filtering the supplied slurry by being recessed from the sealing edge portion A heating filter plate including a filtration unit comprising a;
Including; a heat source supply unit provided to supply hot water of a temperature set to the filter plate;
Hot water supplied from the heat source supply unit circulates through the square pipe,
The sealing edge portion,
An edge frame that forms an edge and supports the filtering unit disposed in the center,
A heat source supply member provided at one side of the edge frame to supply hot water to the filtering unit,
And a heat source return member provided to be guided to discharge the sealing edge by collecting hot water that has passed through the filtering unit on the other side of the edge frame,
And a distribution plate provided in the heat source supply member or the heat source return member so that hot water passing through the plurality of filtering units is uniformly distributed to each of the filtering units and a back pressure is not formed. delete In the filter press dehydration apparatus comprising a filter plate to which a filter cloth is bonded,
A press body;
A plurality of square pipes supported by the press body and spaced apart to support the sealing edge portion, which is an edge region in contact with the adjacent filter plate by pressure, and the filter cloth for filtering the supplied slurry by being recessed from the sealing edge portion A heating filter plate including a filtration unit comprising a;
Including; a heat source supply unit provided to supply hot water of a temperature set to the filter plate;
Hot water supplied from the heat source supply unit circulates through the square pipe,
The sealing edge portion includes an edge frame forming an exterior, a tube sheet coupled to the edge frame to support each of the square pipes, and a corner region of the edge frame so that the filtrate filtered by the filtering portion is discharged. Including a combined filtrate outlet,
And a filtrate channel forming member coupled to the edge frame so that the filtrate filtered between the tube sheet and the square pipe is guided to the filtrate discharge portion. (1) the process of generating hot water in the heat source supply unit using electricity or steam;
Includes a sealing edge portion, which is an edge region that is supported by the press body and is in contact with an adjacent filter plate by pressure, and a plurality of square pipes spaced apart from the sealing edge portion to support a filter cloth for filtering the supplied slurry. (2) circulating hot water in the heat source supply unit at a temperature set in the heating filter plate including the filtering unit;
Including; step (3) of supplying the slurry to be dehydrated to the filter plate including the heated filter plate,
In step (3), step (2) is performed,
The sealing edge portion,
An edge frame forming an edge and supporting the filtering unit disposed in the center, a heat source supply member provided to supply hot water to the filtering unit on one side of the edge frame, and hot water passing through the filtering unit on the other side of the edge frame. It includes a heat source return member provided so as to be able to guide the collecting and discharging the sealing edge,
And a distribution plate provided in the heat source supply member or the heat source return member so that hot water passing through the plurality of filtering units is uniformly distributed to each of the filtering units and a back pressure is not formed. delete

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