JP2008043903A - Heating filter plate of filter press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating filter plate capable of heating a slurry with a high heat efficiency. <P>SOLUTION: The heating filter plate of the invention is equipped with a heating part 34 having a heating medium room 33 to which a heating medium is supplied, a filer frame 35 surrounding the outer periphery of the heating medium room 33 and being arranged not in contact with the heating medium room 33, a connecting member 37 for connecting the heating part 34 and the filter frame 35, several pipings 38 and 39 for making the heating medium flow into and flow out of the heating medium room 33 and a heat conduction spacer 36 for covering the heating part 34 and the connecting member 37 and hindering no flow of a filtrate. Between the heating medium room 33 and the filter frame 35, a heat insulating space 45 for thermally insulating the heating medium room 33 and a plurality of opening parts 46 for making the filtrate flow into the heat insulating space 45 are formed to surround the entire periphery of the heat medium room 33. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heating filter plate for a filter press for dehydrating and drying slurry, and in particular, dewatering sludge such as sludge discharged from wastewater treatment facilities, human waste treatment facilities, and industrial wastewater treatment facilities in water and sewers and rural villages The present invention relates to a heated filter plate used for a filter press to be dried.

  The filter press is a pressure dewatering device for dewatering and drying a slurry such as sludge containing water. As disclosed in Patent Documents 1 and 2, the filter press includes a plurality of heating filter plates arranged in parallel, a heating medium supply line that supplies a heating medium such as hot water to the heating filter plates, and the like. It is configured. A filter chamber is formed between the heated filter plates, and the slurry filled in the filter chamber is squeezed while being heated with a heat medium, and at the same time, the filter chamber is evacuated to dehydrate and dry the slurry.

Japanese Patent No. 3739049 Japanese National Publication No. 9-511441

However, the conventional heating filter plate has the following problems.
(1) The heating filter plate is generally composed of a heat medium passage through which a heat medium flows and a resin filter frame to which the heat medium passage is fixed. In the conventional heating filter plate, since the heat medium flow path and the filter frame are in contact with each other, the heat of the heat medium is released to the surroundings through the filter frame, and the slurry cannot be efficiently heated.
(2) The resin filter frame is deformed by heat from the heat medium.
(3) Since the path for discharging the filtrate is arranged only at the four corners of the heating filter plate, the filtrate flowing from the vicinity of the center of the heating filter plate is in contact with the heating filter plate for a relatively long time. become. For this reason, the filtrate is heated, the heat of the heat medium is taken away by the filtrate, and the thermal efficiency is lowered.

  The present invention has been made to solve the above-described conventional problems, and an object thereof is to provide a heating filter plate capable of heating a slurry with high thermal efficiency.

  That is, according to one aspect of the present invention, a heating unit having a heat medium chamber to which a heat medium is supplied, a filter frame that surrounds the outer periphery of the heat medium chamber and is disposed in non-contact with the heat medium chamber, A connecting member for connecting the heating unit and the filter frame, a plurality of pipes for allowing the heat medium to flow into and out of the heat medium chamber, and covering the heating unit and the connecting member and flowing the filtrate A heat transfer spacer that does not interfere with the heat medium chamber, a heat insulating space for insulating the heat medium chamber between the heat medium chamber and the filter frame, and a plurality of openings for allowing filtrate to flow into the heat insulating space. And the plurality of openings are disposed so as to surround the entire circumference of the heat medium chamber.

The heating unit generates a turbulent flow in a heat transfer plate that is fixed to the pair of heat transfer plates, a side plate fixed to the pair of heat transfer plates, and the heat transfer chamber that is fixed to the pair of heat transfer plates. It is preferable to provide a baffle.
Preferably, the pair of heat transfer plates and the side plates are made of metal, and the pair of heat transfer plates and the side plates are fixed to each other by welding.
The pair of heat transfer plates are formed of metal, the side plates are formed of resin, and the pair of heat transfer plates and the side plates in a state where a seal member is interposed between the pair of heat transfer plates and the side plates. And are fixed to each other by a fastener.

It is preferable that the heating unit has a mounting seat for mounting the connecting member.
The filter frame preferably includes at least four filtrate discharge passages for discharging filtrate, and a plurality of communication passages that connect the heat insulation space and the filtrate discharge passage.
The connecting member is preferably a plurality of ring-shaped members that connect the heating unit and the filter frame.
The connecting member is preferably a plurality of plate-like members that connect the heating unit and the filter frame.

According to the present invention, the heat insulating space is formed between the filter frame and the heat medium chamber, and the heat medium chamber and the filter frame are not in contact with each other, so that the amount of heat transferred from the heat medium in the heat medium chamber to the filter frame is reduced. Very few. Therefore, the heat of the heat medium can be applied to the slurry in the filter chamber with high efficiency, and the slurry can be quickly dehydrated and dried. Further, since the filter frame is hardly deformed, it is possible to prevent the heating filter plate from being damaged due to the deformation.
Furthermore, since the filtrate is quickly discharged from the plurality of openings arranged so as to surround the entire circumference of the heat medium chamber, the contact time between the heating unit and the filtrate is shortened, and the thermal efficiency can be improved.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic diagram showing the overall configuration of the filter press.
As shown in FIG. 1, the filter press includes a plurality of heating filter plates 1 and a plurality of pressing filter plates 2. These heating filter plates 1 and squeezing filter plates 2 are alternately arranged, and are clamped by a clamping device (not shown) and fixed to each other. FIG. 2 is a sectional view showing the heating filter plate 1 and the compressed filter plate 2 shown in FIG. As shown in FIG. 2, concave portions are formed on both side surfaces of the compressed filter plate 2, and a filter chamber 30 is formed between the heated filter plate 1 and the compressed filter plate 2 by the concave portions. A pair of filter cloths 31 are arranged between the adjacent heating filter plate 1 and the compressed filter plate 2, and the filter chamber 30 is surrounded by these filter cloths 31.

  A slurry supply port 15 for supplying slurry to the filter chamber 30 is formed at the center of the heating filter plate 1 and the compressed filter plate 2. The slurry supply port 15 is connected to the slurry supply line 3 shown in FIG. The slurry supply line 3 is provided with a supply valve 6 and a pressure detector 4, and a slurry supply pump 5 is connected to the slurry supply line 3. With such a configuration, slurry such as sludge is supplied to the filter chamber 30 via the slurry supply line 3 by the slurry supply pump 5.

  Each heating filter plate 1 and each squeezing filter plate 2 are connected to heat medium circulation lines 7A and 7B for supplying a heat medium (for example, hot water) to squeeze and heat the slurry in the filter chamber 30. . A heat medium circulation pump 8 and a heat medium inlet temperature measuring device 9 are provided in the heat medium circulation line 7A located on the upstream side, and a heat medium outlet temperature measuring device 10 is provided on the heat medium circulation line 7B located on the downstream side. A pressure detector 11 and a back pressure valve 12 are provided. The back pressure valve 12 is configured to be capable of adjusting the pressure of the heat medium flowing through the heat medium circulation line 7 </ b> B, and the heat supplied to the heating filter plate 1 and the pressure filter plate 2 by operating the back pressure valve 12. The pressure of the medium is adjusted. The heat medium circulation lines 7A and 7B are connected to the heating tank 13, and the heat medium circulating in the heat medium circulation lines 7A and 7B is heated by the heating tank 13. With such a configuration, the heating medium is heated by the heating tank 13 and then supplied to each heating filter plate 1 and each squeezing filter plate 2 via the heating medium circulation line 7A, and via the heating medium circulation line 7B. And returned to the heating tank 13.

  As shown in FIG. 2, a heat medium chamber 33 is formed inside the heating filter plate 1, and the heat medium is supplied to the heat medium chamber 33 through the heat medium circulation line 7A (see FIG. 1). It has become. The squeezing filter plate 2 is basically composed of a pair of diaphragms 60 and a main body portion 61 disposed between the diaphragms 60. A heat medium is supplied between the main body 61 and the diaphragm 60 through the heat medium circulation line 7 </ b> A, and the heat medium is configured to squeeze the slurry in the filter chamber 30 through the diaphragm 60 and the filter cloth 31.

  When the heat medium is supplied to the compressed filter plate 2, the diaphragm 60 is deformed in a direction in which the volume of the filter chamber 30 decreases. Thereby, the slurry in the filter chamber 30 is dehydrated. At this time, moisture contained in the slurry is evaporated by heat applied from the heat medium flowing through the heat medium chamber 33, and dehydration of the slurry is promoted. In this way, the slurry in the filter chamber 30 is gradually dehydrated and dried into a cake. Simultaneously with or after the squeezing, as described below, the inside of the filter chamber 30 is evacuated to further accelerate the drying of the cake.

  As shown in FIG. 1, the filter chamber 30 communicates with the vacuum pump 20 via the vacuum line 16. The vacuum line 16 is provided with a first switching valve (open / close valve) 17A, a condenser (condenser) 18, and a vacuum tank 19. A cooling liquid is supplied to the condenser 18, and the vapor led to the condenser 18 is condensed in the condenser 18 and discharged as a condensed liquid. As the slurry is dehydrated, the filtrate is discharged from the filter chamber 30, and this filtrate is discharged through a filtrate discharge line 21 connected to the vacuum line 16. The filtrate discharge line 21 is provided with a second switching valve 17B. When the vacuum chamber 20 is evacuated by the vacuum pump 20, the second switching valve 17B is closed. Further, by opening the second switching valve 17B, the pressure in the filter chamber 30 can be instantaneously guided from vacuum to atmospheric pressure.

  A discharge line 24 having a discharge valve 23 and a blow line 26 having an air valve 25 are connected to the filter chamber 30. A compressor (not shown) that generates compressed air is connected to the end of the blow line 26, and pressurized air is blown into the filter chamber 30 from the compressor via the blow line 26.

  3 is a plan view showing the heating filter plate 1 shown in FIGS. 1 and 2, and FIG. 4 is a plan sectional view showing the internal structure of the heating filter plate 1. 5 is a cross-sectional view taken along line VV in FIG. 3, and FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 7 is a partially enlarged view of the heating filter plate 1 shown in FIG. 5, and FIG. 8 is an enlarged view showing a portion VIII shown in FIG.

  As shown in FIGS. 3 to 7, the heating filter plate 1 includes a heating unit 34 that heats the slurry charged in the filter chamber 30 (see FIG. 2), and a heat medium chamber so as to surround the outer peripheral surface of the heating unit 34. 33, a pair of heat transfer spacers 36 disposed between the heating part 34 and the filter cloth 31, a pair of connecting members 37 for connecting the heating part 34 and the filter frame 35, and heating. Two heat medium inflow pipes 38 through which the heat medium flows into the section 34 and two heat medium outflow pipes 39 through which the heat medium supplied to the heating section 34 flows out are provided. As shown in FIGS. 5 and 6, the filter frame 35 is formed slightly thicker than the heating unit 34.

  The heating filter plate 1 has a substantially square shape as a whole. The filter frame 35 is a resin member extending along the outer peripheral surface of the heating unit 34. The heating unit 34 has a substantially square shape, and its four corners are chamfered. The heating unit 34 may be octagonal, other polygonal, or circular. A hollow portion is formed inside the heating portion 34, and this hollow portion constitutes the heat medium chamber 33. The heat medium chamber 33 is connected to the heat medium inflow pipe 38 and the heat medium outflow pipe 39 described above. The inner dimension of the filter frame 35 is set larger than the outer dimension of the heat medium chamber 33. Therefore, a heat insulating space 45 extending along the outer periphery of the heat medium chamber 33 is formed between the heat medium chamber 33 and the filter frame 35, and the heat medium chamber 33 and the filter frame 35 are kept in non-contact. .

  The heat medium chamber 33 is formed by a pair of heat transfer plates 42 that constitute both side surfaces thereof, and a side plate 43 that constitutes the outer peripheral surface thereof. The heat transfer plate 42 and the side plate 43 are made of metal, and as shown in FIG. 8, the heat transfer plate 42 and the side plate 43 are fixed to each other by welding.

  The connecting member 37 is a single plate-like member extending along the heat insulating space 45. A plurality of (8 sets in this embodiment) mounting seats 41 are fixed to the outer peripheral surface of the side plate 43 of the heating unit 34, and the connecting member 37 is bolted to these mounting seats 41 and the filter frame 35 (not shown). ). A plurality (16 in this embodiment) of openings (through holes) 46 are formed in the connecting member 37 along the heat insulating space 45. These openings 46 are arranged at substantially equal intervals so as to surround the entire circumference of the heat medium chamber 33.

  The filter chamber 30 is formed by the heat transfer plate 42, the connecting member 37, and the diaphragm 60 shown in FIG. The filtrate discharged from the slurry in the filter chamber 30 flows into the heat insulating space 45 through the opening 46. As a material for the connecting member 37, metal, heat-resistant resin, heat-resistant rubber, or the like is preferably used.

  The filtrate frame 35 is provided with four filtrate discharge paths 47, and these filtrate discharge paths 47 are arranged at the four corners of the filter frame 35, respectively. In addition, a plurality of communication passages 48 are connected to each filtrate discharge passage 47, and the filtrate discharge passage 47 and the heat insulation space 45 communicate with each other through the communication passage 48. Each filtrate discharge passage 47 communicates with the vacuum pump 20 via the vacuum line 16 (see FIG. 1). Therefore, by driving the vacuum pump 20, the filter chamber 30 can be evacuated through the filtrate discharge path 47, the communication path 48, the heat insulation space 45, and the opening 46.

  The heat medium inflow pipe 38 and the heat medium outflow pipe 39 are provided through the filter frame 35 and the heat insulating space 45. A sealing member 40 such as packing is provided on the filter frame 35 in order to seal a minute gap between the heat medium inflow pipe 38 and the filter frame 35 and between the heat medium outflow pipe 39 and the filter frame 35. The heat medium supplied from the heat medium circulation line 7A (see FIG. 1) flows into the heat medium chamber 33 through the heat medium inflow pipe 38, and the heat medium chamber 33 is filled with the heat medium. Thereafter, the heat medium flows out of the heat medium chamber 33 through the heat medium outflow pipe 39 and is discharged to the heat medium circulation line 7B (see FIG. 1). Note that warm water is preferably used as the heat medium.

  The heat transfer spacer 36 is disposed so as to cover the heating unit 34 and the connecting member 37. More specifically, the outer surface of the heat transfer plate 42 and the outer surface of the connecting member 37 are covered with a heat transfer spacer 36. In the present embodiment, a wire mesh is used as the heat transfer spacer 36. However, the heat transfer spacer 36 is not limited to a wire mesh as long as it has a structure with good thermal conductivity and does not hinder the flow of the filtrate.

  Next, the operation of the above-described filter press will be described. First, the supply valve 6 is opened, and slurry (treatment object such as sludge) is supplied to the filter chamber 30 formed between the heating filter plate 1 and the compressed filter plate 2. Next, a pressurized heat medium is supplied to the heating filter plate 1 and the compressed filter plate 2. The heat medium supplied to the squeezing filter plate 2 squeezes and heats the slurry in the filter chamber 30 via the diaphragm 60, thereby dehydrating the slurry. On the other hand, the heat medium supplied to the heating filter plate 1 fills the heat medium chamber 33, heats the slurry in the filter chamber 30 via the heat transfer plate 42 and the heat transfer spacer 36, and evaporates moisture contained in the slurry. In this way, the slurry in the filter chamber 30 is dehydrated and dried to form a cake.

  The filtrate discharged from the filter chamber 30 reaches the opening 46 through the space formed by the heat transfer spacer 36 and flows into the heat insulating space 45 from here. Since these openings 46 are arranged so as to surround the entire circumference of the heat medium chamber 33, the filtrate in the filter chamber 30 can be quickly discharged through the openings 46. Therefore, the contact time between the heating unit 34 and the filtrate is shortened, and a decrease in thermal efficiency can be prevented. In addition, in order to discharge | emit a filtrate rapidly, it is preferable to arrange | position the opening part 46 at 100-200 mm space | interval.

  The filtrate is further discharged to the outside through the communication path 48, the filtrate discharge path 47, and the filtrate discharge line 21 (see FIG. 1). At the same time or after the heating medium is supplied to the heating filter plate 1 and the compressed filter plate 2, the vacuum pump 20 is driven to evacuate the filter chamber 30, and the cake (dehydrated slurry) in the filter chamber 30 is dried. To further promote. The vapor generated by the vacuum flows into the condenser 18 from the opening 46, where it is condensed by exchanging heat with the coolant and discharged as a condensate.

  Thus, moisture is removed from the slurry by dehydration by pressing, evaporation by heat of the heat medium, and evaporation by vacuum. In the present embodiment, a heat insulating space 45 is formed between the filter frame 35 and the heat medium chamber 33, and the heat medium chamber 33 and the filter frame 35 are not in contact with each other. The amount of heat transferred to 35 is extremely small. Therefore, the heat of the heat medium can be applied to the slurry in the filter chamber 30 with high efficiency, and the slurry can be quickly dehydrated and dried. In addition, since the heat of the heat medium is not easily transmitted to the filter frame 35, the filter frame 35 can be prevented from being deformed.

At an arbitrary time, the air valve 25 and the discharge valve 23 are opened, pressurized air is blown into the blow line 26, and the slurry remaining in the slurry supply port 15 and the like is discharged from the discharge line 24.
After the above operations are completed, the above-described tightening device (not shown) is loosened, the filter chamber 30 is opened, and the cake is discharged from the filter chamber 30.

  In addition, in this embodiment, although it is comprised so that a heating medium may be supplied to the heating filter board 1 and the pressing filter board 2 from the same heating-medium circulation system, a separate heating-medium circulation system is provided, and each is provided. You may make it supply a heat medium to the heating filter board 1 and the pressing filter board 2 from a system | strain.

  Next, a heating filter plate according to another embodiment of the present invention will be described with reference to FIGS. 9 and 10. FIG. 9 is a plan sectional view showing a heating filter plate according to another embodiment of the present invention. 10 is a cross-sectional view taken along line XX shown in FIG. In addition, since the structure which is not demonstrated in particular is the same as that of embodiment mentioned above, the overlapping description is abbreviate | omitted.

  As shown in FIGS. 9 and 10, a plurality of baffles 50 having an L-shaped cross section are arranged inside the heat medium chamber 33. Both ends of the baffle 50 are fixed to the inner surfaces of the two heat transfer plates 42 forming the heat medium chamber 33, respectively. These baffles 50 have a role of generating a turbulent flow in the heat medium flowing through the heat medium chamber 33 and a function of reinforcing the heat medium chamber 33 (heat transfer plate 42). That is, by disposing the baffle 50 in the heat medium chamber 33, turbulence is generated in the heat medium flowing through the heat medium chamber 33, and the amount of heat transmitted to the slurry is increased. Further, by fixing the baffle 50 to the heat transfer plate 42, deformation of the heating unit 34 due to the compression pressure at which the heat medium squeezes the slurry in the filter chamber 30 and the expansion pressure of the heat medium flowing through the heat medium chamber 33 is prevented. Can be prevented. In the present embodiment, a member having an L-shaped cross section is used as the baffle 50. However, for example, a plurality of flat plate members arranged by shifting the position little by little may be used. That is, the shape of the baffle 50 is not particularly limited as long as the heat medium chamber 33 can be reinforced and a turbulent flow can be generated in the heat medium.

  Next, a heating filter plate according to another embodiment of the present invention will be described with reference to FIG. FIG. 11 is an enlarged cross-sectional view showing a part of the heating unit 34 of the heating filter plate according to another embodiment of the present invention. In addition, since the structure which is not demonstrated in particular is the same as that of embodiment mentioned above, the overlapping description is abbreviate | omitted.

  In the present embodiment, the side plate 43 forming the heat medium chamber 33 is made of resin. As shown in FIG. 11, the side plate 43 is formed thicker than the heat transfer plate 42, and a seal member 49 such as a gasket or packing is disposed between the side plate 43 and the heat transfer plate 42. ing. The side plate 43 and the heat transfer plate 42 are fixed to each other by a fastener 51 such as a bolt or a screw (in FIG. 11, the fastener 51 is depicted in a simplified manner).

  The structure shown in FIG. 11 has the following advantages over the structure shown in FIG. First, since the side plate 43 is made of resin, the heat insulating property is high. Therefore, the amount of heat transferred from the heat medium in the heat medium chamber 33 to the filtrate in the heat insulation space 45 is small. Secondly, the inside of the heat medium chamber 33 can be easily cleaned by disassembling the heating unit 34. Thirdly, the heating filter plate 1 is light. On the other hand, the structure shown in FIG. 7 is advantageous in that the manufacturing cost is low and the strength is high.

  Next, a heating filter plate according to another embodiment of the present invention will be described with reference to FIGS. 12 and 13. 12 and 13 are plan views showing a heating filter plate according to another embodiment of the present invention. In addition, since the structure which is not demonstrated in particular is the same as that of embodiment mentioned above, the overlapping description is abbreviate | omitted.

  As shown in FIG. 12, the heating unit 34 and the filter frame 35 are connected by a plurality of ring-shaped connecting members 37. In this configuration example, the gap formed between the connecting members 37 constitutes an opening 46 for allowing the filtrate to flow into the heat insulating space 45. This embodiment has an advantage that the manufacturing cost is low and the manufacturing is easy. FIG. 13 shows a configuration example using a plurality of plate-like connecting members 37. Also in this case, the gap formed between the connecting members 37 constitutes the opening 46. Since the connecting members 37 shown in FIGS. 12 and 13 are all arranged at almost equal intervals along the heat insulating space 45, the openings (gap) 46 formed between the connecting members 37 are also formed in the heat insulating space 45. It is arranged at almost equal intervals along. Moreover, since the heating filter plate 1 according to this embodiment has a large opening 46 as compared with the embodiment shown in FIG. 3, the filtrate discharged from the slurry in the filter chamber 30 can be quickly transferred to the heat insulating space 45. Can flow in.

  Next, a heating filter plate according to another embodiment of the present invention will be described with reference to FIG. FIG. 14 is a plan view showing a heating filter plate according to another embodiment of the present invention. In addition, since the structure which is not demonstrated in particular is the same as that of embodiment mentioned above, the overlapping description is abbreviate | omitted.

  As shown in FIG. 14, the heating filter plate 1 of the present embodiment has four heating units 34, and these heating units 34 are arranged with a gap therebetween. The gap between the heating parts 34 constitutes a heat insulating space 45 together with the gap between the heating part 34 and the filter frame 35. The filter frame 35 and these four heating parts 34 are connected by a pair of plate-like connecting members 37 (only one connecting member is shown in FIG. 14), and the heat insulating space 45 is covered by the connecting member 37. ing.

  The upstream heating unit 34 and the downstream heating unit 34 are connected by a connecting pipe 55. Therefore, the heat medium supplied from the heat medium inflow pipe 38 fills the heat medium chamber formed in the upstream heating unit 34 and then fills the heat medium chamber of the downstream heating unit 34. It is discharged through the outflow pipe 39. The configuration of the heat medium chamber is basically the same as that of the above-described embodiment.

  A plurality of openings 46 are formed in the connecting member 37 at substantially equal intervals so as to surround the four heat medium chambers. With such a configuration, the filtrate flowing from the center of the filter chamber 30 can be quickly discharged into the heat insulating space 45. The number of heating units 34 is not limited to four, but may be two, three, or more than four.

  Next, a heating filter plate according to another embodiment of the present invention will be described with reference to FIGS. 15 and 16. FIG. 15 is a sectional view showing a heating filter plate according to another embodiment of the present invention. FIG. 16 is a view showing a state in which a plurality of heating filter plates 1 shown in FIG. 15 are arranged. In addition, the structure which is not demonstrated in particular is the same as that of embodiment mentioned above, The same code | symbol is attached | subjected to the same or an equivalent member, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 15, the filter frame 35 has a thickness approximately twice that of the heating unit 34. Therefore, as shown in FIG. 16, when a plurality of heating filter plates 1 are arranged, a filter chamber 30 is formed between adjacent heating filter plates 1. The filter chamber 30 has a larger volume than the filter chamber shown in FIG. Therefore, the processing amount of the slurry per one dehydration drying process increases. On the other hand, in the configuration shown in FIG. 2, the amount of slurry processed per dehydration drying process is small, but the processing time is shortened. In FIG. 16, the filter chamber 30 is formed using only the heating filter plate 1 shown in FIG. 15, but the filter chamber is formed by the combination of the heating filter plate 1 shown in FIG. 15 and the squeezing filter plate 2 shown in FIG. 2. 30 may be formed.

  Next, a heating filter plate according to another embodiment of the present invention will be described with reference to FIG. FIG. 17 is a sectional view showing a heating filter plate according to another embodiment of the present invention. In addition, the structure which is not demonstrated in particular is the same as that of embodiment mentioned above, The same code | symbol is attached | subjected to the same or an equivalent member, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 17, one of the pair of heat transfer plates 42 is configured to be larger than the other, and an extended portion of the heat transfer plate 42 (peripheral portion of the heat transfer plate 42) serves as one connection member 37. It is composed. A heat insulating member 57 is interposed between the connecting member 37 and the filter frame 35, and the connecting member 37 is fixed to the filter frame 35 with bolts (not shown).

  Such a configuration eliminates the need for a mounting seat or mounting bolt for one of the connecting members 37, and has an advantage that most of the manufacturing work can be performed from one side. Also in the present embodiment, a heat insulating space 45 is formed between the heat medium chamber 33 and the filter frame 35, and the heat medium chamber 33 and the filter frame 35 are kept in non-contact. The amount of heat transferred from the heat medium to the filter frame 35 is extremely small.

  The embodiments described so far can be combined as needed. For example, the baffle shown in FIG. 9 and / or the structure shown in FIG. 11 can be applied to the heating filter plate of FIGS. Moreover, it goes without saying that the present invention is not limited to the above-described embodiments, and may be implemented in various forms within the scope of the technical idea.

It is the schematic which shows the whole structure of a filter press. It is sectional drawing which shows the heating filter plate and pressing filter plate which are shown in FIG. It is a top view which shows the heating filter board shown in FIG. 1 and FIG. It is a plane sectional view showing the internal structure of a heating filter plate. It is the VV sectional view taken on the line of FIG. It is VI-VI sectional drawing of FIG. It is the elements on larger scale of the heating filter board shown in FIG. It is an enlarged view which shows the VIII part shown in FIG. It is a plane sectional view showing a heating filter board concerning other embodiments of the present invention. FIG. 10 is a sectional view taken along line XX shown in FIG. 9. It is an expanded sectional view showing a part of heating part of a heating filter board concerning other embodiments of the present invention. It is a top view which shows the heating filter board which concerns on other embodiment of this invention. It is a top view which shows the heating filter board which concerns on other embodiment of this invention. It is a top view which shows the heating filter board which concerns on other embodiment of this invention. It is sectional drawing which shows the heating filter board which concerns on other embodiment of this invention. It is a figure which shows the state which arranged the heating filter board shown in FIG. 15 in multiple numbers. It is sectional drawing which shows the heating filter board which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating filter board 2 Squeeze filter board 3 Slurry supply line 4 Pressure detector 5 Slurry supply pump 6 Supply valve 7A, 7B Heat medium circulation line 8 Heat medium circulation pump 9 Heat medium inlet temperature measuring instrument 10 Heat medium outlet temperature measuring instrument 11 Pressure detector 12 Back pressure valve 13 Heating tank 15 Slurry supply port 16 Vacuum line 17A First switching valve 17B Second switching valve 18 Condenser 19 Vacuum tank 20 Vacuum pump 21 Filtrate discharge line 23 Discharge valve 24 Discharge line 25 Air valve 26 Blow line 30 Filter chamber 31 Filter cloth 33 Heat medium chamber 34 Heating section 35 Filter frame 36 Heat transfer spacer 37 Connecting member 38 Heat medium inflow pipe 39 Heat medium outflow pipe 40 Seal member 41 Mounting seat 42 Heat transfer plate 43 Side plate 45 Thermal insulation space 46 Opening 47 Filtrate Discharge Channel 48 Communication Channel 49 Sealing Member 50 Baffle 51 Fastener 55 Connecting Pipe 57 Heat Insulating Portion Material 60 Diaphragm 61 Body

Claims (8)

A heating unit having a heat medium chamber to which a heat medium is supplied;
A filter frame that surrounds the outer periphery of the heat medium chamber and is disposed in non-contact with the heat medium chamber;
A connecting member that connects the heating unit and the filter frame;
A plurality of pipes for allowing the heat medium to flow into and out of the heat medium chamber;
A heat transfer spacer that covers the heating unit and the connecting member and does not hinder the flow of the filtrate;
Between the heat medium chamber and the filter frame, a heat insulating space for insulating the heat medium chamber and a plurality of openings for allowing filtrate to flow into the heat insulating space are formed,
The heating filter plate of a filter press, wherein the plurality of openings are arranged so as to surround the entire circumference of the heat medium chamber. The heating unit is
A pair of heat transfer plates;
Side plates fixed to the pair of heat transfer plates;
The heating filter plate of the filter press according to claim 1, further comprising a baffle fixed to the pair of heat transfer plates and generating a turbulent flow in the heat medium flowing through the heat medium chamber. The pair of heat transfer plates and the side plates are made of metal,
The heated filter plate of the filter press according to claim 2, wherein the pair of heat transfer plates and the side plates are fixed to each other by welding. The pair of heat transfer plates are formed of metal,
The side plate is made of resin,
The pair of heat transfer plates and the side plates are fixed to each other by a fastener in a state where a seal member is interposed between the pair of heat transfer plates and the side plates. Filter press heating filter plate.   The said heating part has a mounting seat for attaching the said connection member, The heating filter plate of the filter press of Claim 1 characterized by the above-mentioned. The filter frame is
At least four filtrate outlets for discharging filtrate;
The heating filter plate of the filter press according to claim 1, further comprising a plurality of communication passages that connect the heat insulation space and the filtrate discharge passage.   The heating filter plate of the filter press according to claim 1, wherein the connecting member is a plurality of ring-shaped members that connect the heating unit and the filter frame.   The heating filter plate of the filter press according to claim 1, wherein the connecting member is a plurality of plate-like members that connect the heating unit and the filter frame.

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