KR102444450B1 - Filter press dehydrator with filtrate vacuum suction - Google Patents

Abstract

Disclosed is a filter press dehydrator applied with a filtrate vacuum suction function. The filter press dehydrator includes: a filtration unit including a plurality of filter plates overlapping each other to receive and press sludge into a filtering chamber formed by the filter plates; a filtrate discharge pipe receiving and discharging filtrate from a filtrate line formed by the plurality of filter plates; a pressurized water supply pipe supplying pressurized water to the plurality of filter plates; a pressurized water recovery pipe connected to the pressurized water supply pipe to recover the pressurized water; a vacuum suction unit installed in the pressurized water recovery pipe to form a vacuum pressure for recovering the pressurized water; a connection pipe connecting the pressurized water recovery pipe and the filtrate discharge pipe at an upstream side of the vacuum suction unit so that the filtrate discharged through the filtrate discharge pipe is discharged through the vacuum suction unit installed in the pressurized water recovery pipe; and a pressurized water discharge pipe connected to the pressurized water recovery pipe and the filtrate discharge pipe. The present invention is to shorten the sludge filtrate discharge time.

Description

FILTER PRESS DEHYDRATOR WITH FILTRATE VACUUM SUCTION

The present invention is a filter press dehydrator to which a filtrate vacuum suction function is applied to remove moisture contained in sludge generated in a water treatment process, and a filtrate vacuum suction function that can maximize the sludge moisture removal efficiency while shortening the time of the moisture removal process is applied It relates to a filter press dehydrator.

The filter press, which is applied to various industrial fields such as food/chemical/civil/construction/environment, converts the sludge in suspension supplied into the device into solid and liquid, that is, water and solid sludge by a filter medium composed of a filter plate and filter cloth. It refers to a device that compresses and separates with For example, Korean Patent Registration No. 10-0598675 (July 3, 2006) discloses an example of a filter press.

In general, the dewatering cake produced during the compression/filtration/dehydration process of the filter press contains some degree of viscosity. Therefore, even if the filter plate is opened after filtration is completed, the dewatering cake formed between the filter cloths is not completely separated and discharged, and the sludge remaining in the filter cloth in this way causes a bad odor until a subsequent process is performed.

In particular, the concentration of the odor gas increases during the solid-liquid separation process to reduce the moisture content of the sludge. Desorption of the dehydrated cake discharged after the dewatering process and the odor gas generated during the storage stage cause safety problems for machine operators and cause corrosion of the machine. do.

On the other hand, the viscosity of the sludge in the dewatering process increases the specific resistance to filtration and thus lengthens the time required for dewatering, as well as requires a higher compression pressure.

In addition, when disintegrating the filter plate after dehydration, the sludge cake formed between the filter cloth and the filter cloth adjacent to each other cannot be dropped by gravity due to adhesion due to viscosity. The pressure acting between the scraper and the filter cloth blocks the eyes of the filter cloth, making filtration in the next process very difficult.

Accordingly, there is a need for a technology capable of shortening the time required for the dewatering process and maximizing the effect of removing water from the sludge to improve the efficiency of the compression/filtration/dehydration process of the filter press.

One object of the present invention is to use the suction pressure of the vacuum suction unit acting outside the filter cloth of the filtration unit in addition to the supply pressure of the sludge pump and the supply pressure of the pressurized water of the filter press dehydrator to which the filtrate vacuum suction function is applied. is to shorten

Another object of the present invention is to improve the efficiency of the sludge filtration process by maximizing the water removal effect on the sludge in the sludge filtration process of the filter press dehydrator to which the filtrate vacuum suction function is applied.

Another object of the present invention is to provide a pressurized water recovery pipe to prevent contamination of pressurized water that may occur in the process of vacuum suctioning and discharging the filtrate through the pressurized water recovery pipe of the filter press dehydrator to which the filtrate vacuum suction function is applied. To prevent contamination of industrial water by washing.

In order to achieve the object of the present invention, the filter press dehydrator to which the vacuum suction function of the filtrate according to an embodiment of the present invention is applied includes a plurality of filter plates overlapping and receives and presses sludge in a filter chamber formed by the filter plates. unit; a filtrate discharge pipe for receiving and discharging the filtrate from the filtrate line formed by the plurality of filter plates; a pressurized water supply pipe for supplying pressurized water to the plurality of filter plates; and a pressurized water recovery pipe connected to the pressurized water supply pipe to recover the pressurized water. a vacuum suction unit installed in the pressurized water recovery pipe to form a vacuum pressure for recovering pressurized water; a connection pipe connecting the pressurized water recovery pipe and the filtrate discharge pipe at an upstream side of the vacuum suction part so that the filtrate discharged through the filtrate discharge pipe is discharged through the vacuum suction part installed in the pressurized water recovery pipe; and a pressurized water discharge pipe connected to the pressurized water recovery pipe and the filtrate discharge pipe.

A pressurized water control valve is installed in the pressurized water recovery pipe on an upstream side of a branching point to the connection pipe, and a filtrate control valve for controlling availability and amount of filtrate discharged from the filtrate discharge pipe is installed in the connection pipe A filtrate discharge valve is installed in the filtrate discharge pipe downstream of the branching point to the connection pipe, and a pressurized water recovery valve is installed in the pressurized water recovery pipe downstream of the vacuum suction part, and the pressurized water discharge pipe includes A pressurized water discharge valve may be installed.

The filter press dehydrator to which the filtrate vacuum suction function is applied closes the pressurized water control valve, the pressurized water recovery valve, and the filtrate discharge valve, and opens the filtrate control valve and the pressurized water discharge valve to drive the vacuum suction unit, The filtration unit generates a filtrate while being vacuum-pressed by the vacuum suction unit, and the filtrate is discharged from the filtrate discharge pipe upstream to the pressurized water discharge pipe through the connection pipe and the pressurized water recovery pipe. can be performed.

The filter press dehydrator to which the filtrate vacuum suction function is applied closes the pressurized water control valve, the pressurized water recovery valve and the filtrate discharge valve while supplying pressurized water to the pressurized water supply pipe, and the filtrate control valve and the pressurized water By opening the discharge valve to drive the vacuum suction unit, the filtration unit generates a filtrate while being vacuum compressed by the pressurized water supplied to the filtration unit through the vacuum suction unit and the pressurized water supply pipe, and the filtrate is A vacuum compression dehydration process may be performed by discharging the filtrate from the upstream of the filtrate discharge pipe to the pressurized water discharge pipe through the connection pipe and the pressurized water recovery pipe.

The filter press dehydrator to which the filtrate vacuum suction function is applied closes the filtrate control valve and the pressurized water recovery valve, and opens the pressurized water control valve and the pressurized water discharge valve to drive the vacuum suction unit. can be performed.

The filter press dehydrator to which the filtrate vacuum suction function is applied sequentially performs a vacuum press-in dehydration process, a vacuum compression dehydration process, a pressurized water recovery pipe washing process, and a pressurized water discharge process, and the vacuum press-in dehydration process is performed with the pressurized water control valve , by closing the pressurized water recovery valve and the filtrate discharge valve, and opening the filtrate control valve and the pressurized water discharge valve to drive the vacuum suction unit, thereby generating a filtrate while the filtration unit is vacuum press-fitted by the vacuum suction unit The filtrate is discharged from the upstream of the filtrate discharge pipe to the pressurized water discharge pipe through the connection pipe and the pressurized water recovery pipe, and the vacuum compression dehydration process is a state in which pressurized water is supplied to the pressurized water supply pipe in, closing the pressurized water control valve, the pressurized water recovery valve, and the filtrate discharge valve, and opening the filtrate control valve and the pressurized water discharge valve to drive the vacuum suction unit, the pressurized water recovery pipe washing process closes the filtrate control valve and the pressurized water recovery valve, and opens the pressurized water control valve and the pressurized water discharge valve to drive the vacuum suction unit, thereby generating the filtrate while the filtration unit is vacuum-injected by the vacuum suction unit and the filtrate is discharged from the upstream of the filtrate discharge pipe to the pressurized water discharge pipe through the connection pipe and the pressurized water recovery pipe, and the pressurized water discharge process closes the filtrate control valve and the pressurized water discharge valve and opening the pressurized water control valve, the pressurized water recovery valve, and the filtrate discharge valve to drive the vacuum suction unit.

In order to achieve the object of the present invention, a filter press dehydrator to which a filtrate vacuum suction function is applied according to another embodiment of the present invention includes a plurality of filter plates overlapping to accommodate and compress sludge in a filter chamber formed by the filter plates. filtration unit; a first filtrate discharge pipe for receiving and discharging the filtrate from the filtrate line formed by the plurality of filter plates; a pressurized water supply pipe for supplying pressurized water to the plurality of filter plates; a pressurized water recovery pipe connected to the pressurized water supply pipe to recover the pressurized water; a first vacuum suction unit installed in the pressurized water recovery pipe to form a vacuum pressure for recovering pressurized water; And the first filtrate discharge pipe may be formed with a second filtrate discharge pipe having a second vacuum suction unit for receiving and discharging the filtrate.

A pressurized water control valve is installed between the pressurized water return pipe and the pressurized water supply pipe, and a first filtrate discharge valve is installed in the first filtrate discharge pipe on a downstream side of a branching point to the second filtrate discharge pipe, the A second filtrate discharge valve may be installed in the second filtrate discharge pipe at an upstream side of the second vacuum suction unit.

The filter press dehydrator to which the filtrate vacuum suction function is applied closes the pressurized water control valve and the first filtrate discharge valve, and opens the second filtrate discharge valve to drive the second vacuum suction unit. can do.

The filter press dehydrator to which the filtrate vacuum suction function is applied closes the pressurized water control valve and the first filtrate discharge valve while supplying pressurized water to the pressurized water supply pipe, and opens the second filtrate discharge valve to open the second By driving the vacuum suction unit, the vacuum compression dehydration process can be performed by driving the vacuum compression dehydration process.

The effects of the present invention obtained through the above-described solution are as follows.

In addition to the supply pressure of the sludge pump and the supply pressure of pressurized water of the filter press dehydrator to which the filtrate vacuum suction function is applied, the suction pressure of the vacuum suction unit acting outside the filter cloth of the filtration unit can be additionally used to shorten the sludge filtrate discharge time. .

The efficiency of the sludge filtration process can be improved by maximizing the water removal effect on the sludge during the sludge filtration process of the filter press dehydrator to which the filtrate vacuum suction function is applied.

To prevent contamination of pressurized water that may occur during vacuum suction and discharge of filtrate through the pressurized water recovery pipe of the filter press dehydrator to which the filtrate vacuum suction function is applied, the pressurized water recovery pipe is washed to prevent contamination of industrial water. can be prevented

1 is a conceptual diagram of a filter press dehydrator to which a filtrate vacuum suction function is applied according to an embodiment of the present invention.
2 is a conceptual diagram illustrating a state in which filter plates constituting a filtration unit of a filter press dehydrator to which a filtrate vacuum suction function is applied according to an embodiment of the present invention are connected to pipes in which valves are installed;
3 is a conceptual diagram illustrating a front view of a filter plate constituting a filtration unit of a filter press dehydrator to which a filtrate vacuum suction function is applied according to an embodiment of the present invention.
4 is a conceptual view showing the state of piping and valves of each dehydration process including the vacuum dehydration process of the filter press dehydrator to which the vacuum suction function of the filtrate is applied according to an embodiment of the present invention.
5 is a conceptual diagram illustrating a state in which filter plates constituting a filtration unit of a filter press dehydrator to which a filtrate vacuum suction function is applied according to another embodiment of the present invention are connected to pipes in which valves are installed;
6 is a conceptual view showing the state of piping and valves of each dehydration process including the vacuum dehydration process of the filter press dehydrator to which the vacuum suction function of the filtrate is applied according to another embodiment of the present invention.

Hereinafter, the filter press dehydrator 100 to which the vacuum suction function of the filtrate according to the present invention is applied will be described in more detail with reference to the drawings.

In the present specification, the same and similar reference numerals are given to the same and similar components even in different embodiments, and a redundant description thereof will be omitted.

In describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted.

The accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in the present specification is not limited by the accompanying drawings, and all changes and equivalents included in the spirit and scope of the present invention It should be understood to include water or substitutes.

In the following description, the singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprises” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

1 is a conceptual diagram of a filter press dehydrator to which a filtrate vacuum suction function is applied according to an embodiment of the present invention. 2 is a conceptual diagram illustrating a state in which filter plates constituting a filtration unit of a filter press dehydrator to which a filtrate vacuum suction function is applied according to an embodiment of the present invention are connected to pipes in which valves are installed. Here, one embodiment may be referred to as a first embodiment.

The filter press dehydrator 100 according to the first embodiment includes a filtration unit 110 , a sludge supply pipe 120 , a sludge supply tank 130 , an air compressor 140 , a pressurized water supply tank 150 , and a washing water supply. It may include a tank 160 and a filtrate tank 170 .

Specifically, the filter press dehydrator 100 is a device for dewatering sludge generated in various activities using the filtration unit 110, and the sludge stored in the sludge supply tank 130 is filtered through the sludge supply pipe 120 through the filtration unit ( 110), and the filtration unit 110 may dehydrate the supplied sludge to form a cake. At this time, the pressurized water supply tank 150 may supply pressurized water in the filtration unit 110 to promote sludge dewatering, and the air compressor 140 promotes the discharge of the pressurized water, and the washing water supply tank 160 . may supply washing water to remove odors and sludge residues in the filtration unit 110 .

Hereinafter, these configurations will be described in detail, and first, the filtration unit 110 will be described with reference to FIG. 3 together. 3 is a conceptual view illustrating a front view of a filter plate constituting a filtration unit of a filter press dehydrator to which a filtrate vacuum suction function is applied according to an embodiment of the present invention. The filtration unit 110 is provided with a plurality of filter plates that are arranged to overlap each other and move linearly, and the plurality of filter plates are, respectively, at least one sludge core (111a, 112a, 113a, 114a) and a plurality of filtrate cores (111b, 112b, 113b, 114b) may be provided.

Specifically, the filtration unit 110 may include 10 or more overlapping filter plates, for example, a first filter plate 111 , a second filter plate 112 , a third filter plate 113 and a fourth filter plate ( 114) may be included. Although the plurality of filter plates is shown and described as being limited to a first filter plate 111 , a second filter plate 112 , a third filter plate 113 and a fourth filter plate 114 in other drawings including FIG. 3 and in the description herein, This is for the sake of ease of explanation, and does not mean that the number of filter plates is limited. The filter plate may be in the form of dozens of overlapping plates.

One or more sludge cores (111a, 112a, 113a, 114a) and a plurality of filtrate cores (111b, 112b, 113b, 114b) may be formed on the filter plates of the filtration unit 110, respectively. The sludge cores 111a, 112a, 113a, and 114a may be formed at the center of the filter plate, and the filtrate cores 111b, 112b, 113b, and 114b may be formed at four corners of the filter plate.

A flow path forming unit 111c may be formed at a position where the sludge core 111a is formed. The flow path forming unit 111c may be coupled to both sides of the inn through a fastening member such as a bolt. The flow path forming unit 111c may include a convex portion 111ca to which the fastening member is coupled and a concave portion 111cb to which the fastening member is not coupled. The convex portion 111ca and the concave portion 111cb are alternately and repeatedly formed along the circumference around the sludge core 111a.

The convex part 111ca faces the convex part 112ca of the adjacent filter plate, and the concave part 111cb therebetween allows the sludge to be supplied from the sludge core 111a to the filter chamber 111d. A flow path 111cb. is formed Since a plurality of flow passages 111cb are formed in the radial direction, the sludge may be uniformly supplied to the upper, lower, left, and right sides of the filter plate 111 .

Like the number of filter plates, the number of the sludge cores 111a, 112a, 113a, 114a and the filtrate cores 111b, 112b, 113b, 114b is not limited. For example, one sludge core (111a, 112a, 113a, 114a) and four filtrate cores (111b, 112b, 113b, 114b) may be formed in each of the plurality of filter plates. The sludge core (111a, 112a, 113a, 114a) has a plurality of filter plates overlapped to form a sludge line (SL) in which the sludge cores (111a, 112a, 113a, 114a) are continuously overlapped, and the filtrate core (111b, 112b, 113b, and 114b) are overlapped with a plurality of filter plates to form a plurality of different filtrate lines FL in which the respective filtrate cores 111b, 112b, 113b, and 114b are continuously overlapped.

The plurality of filter plates 111 , 112 , 113 , 114 may be linearly moved by hydraulic action to closely contact each other or may be spaced apart from each other. For linear movement of the filter plate by hydraulic action, filter plate mounting portions 111e protrude from the left and right sides of the filter plate.

Referring back to FIGS. 1 and 2 , the sludge line SL of the filtration unit 110 may be connected to the sludge supply tank 130 through the sludge supply pipe 120 , and the sludge supply pipe 120 has a sludge pump. (131) may be installed. The sludge of the sludge supply tank 130 may be filled in the sludge line SL due to the operation of the sludge pump 131 and supplied to the filtration unit 110 . The sludge filled in the sludge line SL may be filled in the filter chamber 111d formed between the filter plate and the filter plate through the sludge core. At this time, the sludge filled in the filtration chamber 111d may be dewatered by primary press-fitting and secondary compression, and the dehydrated filtrate may be discharged to the filtrate tank 170 along the filtrate line FL and the filtrate discharge pipe.

The pressurized water supply tank 150 may be connected to each of the filter chambers, and may supply pressurized water to the filter chamber to further dewater the sludge supplied to the filter chamber.

The filtration unit 110 and the pressurized water supply tank 150 are connected to each other through a pressurized water supply pipe 151 and a pressurized water recovery pipe 152 .

The pressurized water supply pipe 151 supplies pressurized water to the filtration unit 110 to reduce the volume of the filter chamber. The pressurized water recovery pipe 152 recovers pressurized water after compressing the sludge in the filter chamber of the filtration unit 110 . At this time, a vacuum suction unit 156 for generating a vacuum pressure for recovering the pressurized water is installed in the pressurized water recovery pipe 152 .

An example of the vacuum suction unit 156 is a vacuum pump, but is not necessarily limited thereto, and any configuration capable of forming a vacuum pressure for recovery of pressurized water and/or suction of filtrate is applicable.

After the compression dehydration process by the pressurized water supplied from the pressurized water supply tank 150 is performed, the air compressor 140 connected to the filtration unit 110 supplies air for discharging the pressurized water into the filtration unit 110 . can

A filtrate discharge pipe 171 for receiving and discharging the filtrate from the filtrate line is formed between the filtrate line formed on the filter plate of the filtration unit 110 and the filtrate tank 170 .

The first embodiment of the present invention is formed so that the filtrate discharged through the filtrate discharge pipe 171 is discharged through the vacuum suction unit 156 installed in the pressurized water recovery pipe 152 . Specifically, a connection pipe 157 connecting the pressurized water recovery pipe 156 and the filtrate discharge pipe 171 is installed on an upstream side of the vacuum suction unit 156 . In addition, a pressurized water discharge pipe 153 is installed between the pressurized water recovery pipe 152 and the filtrate discharge pipe 171 for a cleaning action according to the filtrate discharge.

Accordingly, the vacuum suction unit 156 further promotes the recovery of pressurized water after compressing the sludge in the filter chamber of the filtration unit 110 through suction pressure. Since the suction pressure can be transmitted to the filtrate discharge pipe 171 through the connection pipe 157, it further promotes the discharge of the filtrate in the filtrate discharge pipe 171 to shorten the filtrate discharge time, and the sludge filtration efficiency of the filtration unit 110 can be further improved.

On the other hand, valves may be installed in each of the pressurized water return pipe 152 and the connection pipe 157 . Specifically, the pressurized water recovery pipe 152 is located at an upstream side of a branching point to the connection pipe 157 . A pressurized water control valve 152a may be installed, and a pressurized water recovery valve 152b may be installed downstream of the vacuum suction unit 156 . In addition, the connection pipe 157 may be provided with a filtrate control valve (157a) for controlling the availability and amount of the filtrate discharged from the filtrate discharge pipe (171). In addition, the filtrate discharge pipe 171 and the pressurized water discharge pipe 153 may be provided with a filtrate discharge valve 171a and a pressurized water discharge valve 153a, respectively.

As described above, the vacuum dehydration and washing process of the filter press dehydrator 100 to which the filtrate vacuum suction function is applied through the opening/closing control of the valves 152a, 152b, 153a, 157a, 171a installed in each pipe may be sequentially performed. . This will be described with reference to FIG. 4 .

4 is a conceptual diagram illustrating the state of piping and valves in each dehydration process including the vacuum dehydration process of the filter press dehydrator to which the vacuum suction function of the filtrate is applied according to an embodiment of the present invention. The filter press dehydrator 100 to which the vacuum suction function of the filtrate is applied may perform a vacuum press dehydration process as well as a conventional general press-fit dehydration process. 4 exemplifies the operation of the filter press dehydrator according to general press dehydration, vacuum press dehydration, general press dehydration, vacuum press dehydration, pressurized water discharge (washing), and pressurized water discharge (general).

For reference, the press-in dewatering refers to dewatering the sludge only with the pressing force that supplies the sludge to the filter chamber without the supply of pressurized water. Conversely, compression dewatering refers to a process in which pressurized water is supplied to the filtration unit and the volume of the filter chamber is reduced to further promote dewatering of the sludge.

In addition, general press-in dewatering refers to a process in which press-in dewatering of sludge is performed without the aid of a vacuum pump, and vacuum press-in dewatering refers to press-in dewatering in which a vacuum pump operates to promote discharge of filtrate.

Similarly, general compression dewatering refers to a process in which compression dewatering of sludge is performed without the aid of a vacuum pump, and vacuum compression dehydration refers to compression dehydration in which a vacuum pump operates to promote discharge of filtrate.

The process shown in FIG. 4 may be sequentially repeated or may be selectively repeated as necessary. For example, a general press-in dewatering operation, a general compression dehydration operation may be performed, or a vacuum press-in dehydration operation and a vacuum compression dehydration operation may be performed.

In the general press-in dehydration process, the pressurized water control valve 152a, the filtrate control valve 171a and the pressurized water discharge valve 153a are closed, and the filtrate discharge valve 171a of the filtrate discharge pipe 171 is opened while the filtration unit It is carried out through the process of supplying sludge to the sludge line at 110 at a high pressure through a pump installed in the sludge supply tank 130, etc. so that the filtrate is extracted through a filter plate while the sludge is press-injected.

In the filter press dehydrator 100 to which the filtrate vacuum suction function is applied, the filtrate can be extracted from the sludge through this general press-in dehydration process and then the vacuum press-in dehydration process can be performed. By performing the vacuum press-in dewatering process, the dehydration process can be shortened.

In addition, in the general compression dewatering process, the pressurized water control valve 152a, the filtrate control valve 171a, and the pressurized water discharge valve 153a are closed, and the filtrate discharge valve 171a of the filtrate discharge pipe 171 is opened. By filling the pressurized water supply pipe 151 with pressurized water to supply pressurized water to the filter plate of the filtration unit 110, the filter plate compresses the sludge to extract the filtrate.

In the filter press dehydrator 100 to which the filtrate vacuum suction function is applied, this general compression dehydration process may be performed after performing a general press-in dehydration process and a vacuum press-in dehydration process, and the general compression dehydration process is omitted like the general press-in dehydration process. And, by performing a vacuum compression dehydration process, it is possible to shorten the dehydration process time.

In addition, the general pressurized water discharge (recovery) process performed after the general compression dehydration process or vacuum compression dehydration process is performed with the filtrate control valve 157a and the pressurized water discharge valve 153a closed while the pressurized water control valve 152a, The pressurized water recovery valve 152b and the filtrate discharge valve 171a are opened, the vacuum suction unit 156 is driven, and then pressurized water is supplied to the pressurized water supply pipe 151 through the pressurized water recovery pipe 152 . Pressurized water proceeds to be recovered.

The pressurized water control valve 152a, the pressurized water recovery valve 152b, and the filtrate discharge valve 171a are closed, and the filtrate control valve 157a and the pressurized water discharge valve 153a are opened to open the vacuum suction unit. By driving 156, the filtration unit 110 is vacuum-pressed by the vacuum suction unit 156 to generate a filtrate, and the filtrate is the connection pipe 157 upstream of the filtrate discharge pipe 171. And by discharging the pressurized water to the pressurized water outlet pipe 153 through the pressurized water recovery pipe 152, a vacuum press-in dehydration process can be performed.

Since this vacuum dehydration process is a process of discharging the filtrate by transferring the suction pressure of the vacuum suction unit 156 to the filtrate discharge pipe 171 through the connection pipe 153, only the filtrate discharge pipe ( 171), it is possible to improve the filtrate discharge effect and significantly shorten the filtrate discharge time compared to the case of discharging the filtrate through only the filtrate discharge valve 171a.

In addition, in a state in which pressurized water is supplied to the pressurized water supply pipe 151 in the filter press dehydrator 100 to which the filtrate vacuum suction function is applied, the pressurized water control valve 152a, the pressurized water recovery valve 152b, and the filtrate By closing the discharge valve (171a) and opening the filtrate control valve (157a) and the pressurized water discharge valve (153a) to drive the vacuum suction unit 156, the filtration unit 110 is the vacuum suction unit ( 156) and the pressurized water supply pipe 151 to generate a filtrate while vacuum compressed by the pressurized water supplied to the filtration unit 110, and the filtrate is produced in the connection pipe ( 157) and the pressurized water recovery pipe 152 through the pressurized water discharge pipe 153, the vacuum compression dehydration process can be performed.

In this vacuum compression dehydration process, the strong suction pressure of the vacuum suction unit 156 is transferred to the filtrate line of the filtrate discharge pipe 171 and the filtration unit 110 through the connection pipe 153 to further maximize the compression force of the filter plates to dehydrate Since the process is carried out, there is an advantage in that the dehydration speed and dehydration efficiency are significantly improved compared to the conventional general compression dehydration process.

On the other hand, the filter press dehydrator 100 to which the filtrate vacuum suction function is applied closes the filtrate control valve 157a and the pressurized water recovery valve 152b, and the pressurized water control valve 152a and the pressurized water discharge valve 171a ) by opening the vacuum suction unit 156 to drive the pressurized water recovery pipe 152 washing process can be performed.

That is, the filtrate control valve 157a is closed to prevent the filtrate from the filtrate discharge pipe 171 from moving to the pressurized water recovery pipe 152, and at the same time, the pressurized water recovery valve 152b is closed by the pressurized water supply pipe 151. In a state in which the pressurized water is not recovered to the pressurized water supply tank 150, the vacuum suction unit 156 is driven to flow the pressurized water from the pressurized water supply pipe 151 into the pressurized water recovery pipe 152, and the pressurized water recovery pipe ( 152) is washed and then discharged to the pressurized water discharge pipe 153, so that the pressurized water recovery pipe 152 is effectively washed, and the pressurized water used in the filter press dehydrator 100 to which the filtrate vacuum suction function is applied contamination can be prevented.

The vacuum compression dehydration process, vacuum compression dehydration process, and pressurized water recovery pipe washing process may be performed in a different order, but preferably, they are sequentially performed together with the final pressurized water discharge process, so that the vacuum suction function of the filtrate is applied. The sludge dewatering process of the filter press dehydrator 100 can be performed more quickly and effectively. In addition, the vacuum compression dehydration process, the vacuum compression dehydration process, and the pressurized water recovery pipe washing process do not use the vacuum suction unit 156 in consideration of the usage time and conditions of the filter press dehydrator 100 to which the filtrate vacuum suction function is applied. It may be used in combination with a general press-in dehydration process or a general compression dehydration process.

Hereinafter, another embodiment will be described.

5 is a conceptual diagram illustrating a state in which filter plates constituting a filtration unit of a filter press dehydrator to which a filtrate vacuum suction function is applied according to another embodiment (second embodiment) of the present invention are connected to pipes in which valves are installed; FIG. 6 is a conceptual diagram showing the state of piping and valves of each dehydration process including the vacuum dehydration process of the filter press dehydrator to which the vacuum suction function of the filtrate is applied according to another embodiment of the present invention.

As another embodiment of the present invention, the filter press dehydrator 200 to which the filtrate vacuum suction function is applied obtains the filtrate from the filtration unit 210 and the filtrate line formed by a plurality of filter plates of the filtration unit 210. A first filtrate discharge pipe 271 for discharging, a pressurized water supply pipe 251 for supplying pressurized water to the plurality of filter plates, a pressurized water recovery pipe 252 connected to the pressurized water supply pipe to recover the pressurized water, the A second vacuum suction unit 256 installed in the pressurized water recovery pipe 252 to form a vacuum pressure for recovering pressurized water, wherein the first filtrate discharge pipe 271 receives and discharges the filtrate A second filtrate discharge pipe 272 having a vacuum suction unit 276 may be formed in a structure.

The filtrate discharge pipe 271 may be called a first filtrate discharge pipe 271 in order to distinguish it from the second filtrate discharge pipe 272 . Similarly, the vacuum suction unit 256 may be referred to as a first vacuum suction unit 256 to distinguish it from the second vacuum suction unit 276 .

That is, the filter press dehydrator 200 to which the filtrate vacuum suction function is applied forms a first filtrate discharge pipe 271 for discharging the filtrate from the filtration unit 210 and a second filtrate discharge pipe 272 branching therefrom, By installing a second vacuum suction unit 276 in the second filtrate discharge pipe 272 and performing a vacuum press-in dehydration process and a vacuum compression dehydration process through the second vacuum suction unit 276, the filtration unit 210 It is possible to shorten the discharge time of the filtrate and further improve the filtration efficiency.

In addition, the filter press dehydrator 200 to which the filtrate vacuum suction function is applied has a vacuum suction unit 256 (first vacuum suction unit) installed in the pressurized water recovery pipe 252, so that it can be used when recovering pressurized water, Since the second vacuum suction unit 276 is installed in the second filtrate discharge pipe 272, the second vacuum suction unit 276 can be used in the vacuum press-in dehydration process and the vacuum compression dehydration process, so the pressurized water recovery pipe 252 A connection pipe (not shown) is formed in the filtrate discharge pipe 271 to reduce the load of the vacuum suction unit 256 compared to the case of performing pressurized water recovery, discharge, vacuum press-in dehydration and vacuum compression dehydration only with the vacuum suction unit 256. It can be reduced, and there is an advantage that vacuum press-in dehydration and vacuum compression dehydration can be performed more effectively.

A valve is also installed in each pipe of the filter press dehydrator 200 to which the filtrate vacuum suction function is applied, and specifically, the pressurized water return pipe 252 has a pressurized water control valve between the pressurized water supply pipe 251 ( 252a) is installed, the first filtrate discharge pipe 271 is provided with a filtrate discharge valve 271a on the downstream side of the branching point to the second filtrate discharge pipe 272, and the second filtrate discharge pipe 272 has A second filtrate discharge valve 272a is installed on the upstream side of the second vacuum suction unit 276 . The first filtrate discharge valve 271a may be referred to as a first filtrate discharge valve 271a to distinguish it from the second filtrate discharge valve 272a.

In addition, the vacuum compression dehydration process and the vacuum compression dehydration process may be respectively performed by controlling the opening and closing of the valves 252a, 271a, and 272a.

Specifically, the filter press dehydrator 100 to which the filtrate vacuum suction function is applied closes the pressurized water control valve 252a and the first filtrate discharge valve 271a, and opens the second filtrate discharge valve 272a. By driving the second vacuum suction unit 276, a vacuum press-in dehydration process may be performed.

The filter press dehydrator 100 to which the filtrate vacuum suction function is applied closes the pressurized water control valve 252a and the filter 1 liquid discharge valve 271a while supplying pressurized water to the pressurized water supply pipe 151, and , a vacuum compression dehydration process may be performed by opening the second filtrate discharge valve 272a to drive the second vacuum suction unit 276 .

On the other hand, in another embodiment of the filter press dehydrator to which the filtrate vacuum suction function is applied, the general press-in dehydration process closes the pressurized water control valve 252a and the second filtrate discharge valve 272a, and the first filtrate discharge pipe 271 1 In a state in which the filtrate discharge valve 271a is opened, the sludge is supplied to the sludge line of the filtration unit 110 at a high pressure through a pump installed in the sludge supply tank 130, etc. This is done through a process that makes it possible.

In the filter press dehydrator 100 to which the filtrate vacuum suction function of the other embodiment is applied, the primary filtrate can be extracted from the sludge through this general press-in dehydration process, and then the vacuum press-in dehydration process can be performed secondarily. By omitting the press-in dehydration process and directly performing the vacuum press-in dehydration process, the dehydration process can be shortened.

In addition, in the general compression dehydration process, the pressurized water control valve 152a and the second filtrate discharge valve 272a are closed, and the first filtrate discharge valve 271a of the first filtrate discharge pipe 271 is opened. By filling the water supply pipe 251 with pressurized water to supply pressurized water to the filter plate of the filtration unit 210, the filter plate compresses the sludge to extract the filtrate.

In the filter press dehydrator 100 to which the vacuum suction function of the filtrate of the other embodiment is applied, after performing the general press-in dehydration process and the vacuum press-in dehydration process, this general compression dehydration process may be performed. By omitting the process and performing the vacuum compression dehydration process, the dehydration process can be shortened.

In addition, the general pressurized water discharge (recovery) process of another embodiment performed after the general compression dehydration process or the vacuum compression dehydration process closes the second filtrate discharge valve 272a, and discharges the pressurized water recovery valve 252a and the first filtrate After the valve 271a is opened, the pressurized water is supplied to the pressurized water supply pipe 151 by driving the first vacuum suction unit 256 to recover the pressurized water through the pressurized water recovery pipe 152 .

The filter press dehydrator to which the filtrate vacuum suction function described above is applied is not limited to the configuration and method of the above-described embodiments, but all or part of each embodiment is selectively combined so that various modifications can be made. may be configured.

100: Filter press dehydrator with filtrate vacuum suction function
110: filtration unit
120: sludge supply pipe
130: sludge supply tank
140: air compressor
150: pressurized water supply tank
151: pressurized water supply pipe
152: pressurized water return pipe
153: pressurized water discharge pipe
156: vacuum pump
157: connecting pipe
160: wash water supply tank
170: filtrate tank
171: filtrate discharge pipe

Claims (10)

a filtration unit including a plurality of filter plates overlapping and accommodating and compressing the sludge in a filter chamber formed by the filter plates;
a filtrate discharge pipe for receiving and discharging the filtrate from the filtrate line formed by the plurality of filter plates;
a pressurized water supply pipe for supplying pressurized water to the plurality of filter plates; and
a pressurized water recovery pipe connected to the pressurized water supply pipe to recover the pressurized water;
a vacuum suction unit installed in the pressurized water recovery pipe to form a vacuum pressure for recovering pressurized water;
a connection pipe connecting the pressurized water recovery pipe and the filtrate discharge pipe at an upstream side of the vacuum suction part so that the filtrate discharged through the filtrate discharge pipe is discharged through the vacuum suction part installed in the pressurized water recovery pipe; and
a pressurized water discharge pipe connected to the pressurized water recovery pipe and the filtrate discharge pipe;
Filter press dehydrator with filtrate vacuum suction function including
According to claim 1,
A pressurized water control valve is installed in the pressurized water return pipe at an upstream side of a branching point to the connection pipe,
A filtrate control valve is installed in the connection pipe to control whether or not the filtrate discharged from the filtrate discharge pipe is obtained and the amount obtained,
A filtrate discharge valve is installed on the downstream side of the branching point to the connection pipe in the filtrate discharge pipe,
A pressurized water recovery valve is installed on the downstream side of the vacuum suction part in the pressurized water recovery pipe,
A filter press dehydrator to which a filtrate vacuum suction function is applied in which a pressurized water discharge valve is installed in the pressurized water discharge pipe.
3. The method of claim 2,
The filter press dehydrator to which the vacuum suction function of the filtrate is applied
By closing the pressurized water control valve, the pressurized water recovery valve and the filtrate discharge valve, and open the filtrate control valve and the pressurized water discharge valve to drive the vacuum suction unit,
The filtration unit is vacuum-pressed by the vacuum suction unit to generate a filtrate, and the filtrate is discharged from the filtrate discharge pipe upstream to the pressurized water discharge pipe through the connection pipe and the pressurized water recovery pipe. Filter press dehydrator with filtrate vacuum suction to carry out the process.
3. The method of claim 2,
The filter press dehydrator to which the vacuum suction function of the filtrate is applied
In a state in which pressurized water is supplied to the pressurized water supply pipe,
By closing the pressurized water control valve, the pressurized water recovery valve and the filtrate discharge valve, and open the filtrate control valve and the pressurized water discharge valve to drive the vacuum suction unit,
The filtration unit generates a filtrate while being vacuum compressed by the pressurized water supplied to the filtration unit through the vacuum suction unit and the pressurized water supply pipe, and the filtrate is connected to the connection pipe and the pressurized water upstream of the filtrate discharge pipe A filter press dehydrator to which a vacuum suction function of a filtrate is applied, which performs a vacuum compression dehydration process by discharging it to the pressurized water discharge pipe through a recovery pipe.
3. The method of claim 2,
The filter press dehydrator to which the vacuum suction function of the filtrate is applied
A filter press to which a filtrate vacuum suction function is applied to perform a pressurized water recovery pipe washing process by closing the filtrate control valve and the pressurized water recovery valve, and opening the pressurized water control valve and the pressurized water discharge valve to drive the vacuum suction unit dehydrator.
3. The method of claim 2,
The filter press dehydrator to which the filtrate vacuum suction function is applied sequentially performs a vacuum pressure dehydration process, a vacuum compression dehydration process, a pressurized water recovery pipe washing process, and a pressurized water discharge process,
The vacuum press-in dehydration process closes the pressurized water control valve, the pressurized water recovery valve, and the filtrate discharge valve, and opens the filtrate control valve and the pressurized water discharge valve to drive the vacuum suction unit, thereby allowing the filtration unit to generate the vacuum The filtrate is generated while being vacuum pressed by the suction unit, and the filtrate is discharged from the filtrate discharge pipe upstream through the connection pipe and the pressurized water recovery pipe to the pressurized water discharge pipe,
In the vacuum compression dehydration process, in a state in which pressurized water is supplied to the pressurized water supply pipe,
By closing the pressurized water control valve, the pressurized water recovery valve, and the filtrate discharge valve, and open the filtrate control valve and the pressurized water discharge valve to drive the vacuum suction unit, the filtration unit operates the vacuum suction unit and the pressurized water The filtrate is generated while being vacuum compressed by the pressurized water supplied to the filtration unit through the supply pipe, and the filtrate is discharged to the pressurized water discharge pipe through the connection pipe and the pressurized water recovery pipe from the upstream of the filtrate discharge pipe. performed,
The pressurized water recovery pipe washing process is performed by closing the filtrate control valve and the pressurized water recovery valve, and driving the vacuum suction unit by opening the pressurized water control valve and the pressurized water discharge valve,
The pressurized water discharge process closes the filtrate control valve and the pressurized water discharge valve, and opens the pressurized water control valve, the pressurized water recovery valve, and the filtrate discharge valve to drive the vacuum suction unit. filter press dehydrator.
a filtration unit including a plurality of filter plates overlapping and accommodating and compressing the sludge in a filter chamber formed by the filter plates;
a first filtrate discharge pipe for receiving and discharging the filtrate from the filtrate line formed by the plurality of filter plates;
a pressurized water supply pipe for supplying pressurized water to the plurality of filter plates;
a pressurized water recovery pipe connected to the pressurized water supply pipe to recover the pressurized water;
a first vacuum suction unit installed in the pressurized water recovery pipe to form a vacuum pressure for recovering pressurized water; and
A filter press dehydrator to which a filtrate vacuum suction function is applied in which a second filtrate discharge pipe having a second vacuum suction unit for receiving and discharging the filtrate is formed in the first filtrate discharge pipe.
8. The method of claim 7,
A pressurized water control valve is installed in the pressurized water return pipe between the pressurized water supply pipe and the pressurized water supply pipe,
A first filtrate discharge valve is installed in the first filtrate discharge pipe downstream of the branching point to the second filtrate discharge pipe,
A filter press dehydrator to which a filtrate vacuum suction function is applied in which a second filtrate discharge valve is installed on an upstream side of the second vacuum suction part in the second filtrate discharge pipe.
9. The method of claim 8,
The filter press dehydrator to which the vacuum suction function of the filtrate is applied
Filter press dehydrator to which a filtrate vacuum suction function is applied to perform a vacuum press-in dehydration process by closing the pressurized water control valve and the first filtrate discharge valve, and opening the second filtrate discharge valve to drive the second vacuum suction unit .
9. The method of claim 8,
The filter press dehydrator to which the vacuum suction function of the filtrate is applied
In a state in which pressurized water is supplied to the pressurized water supply pipe
Filter press dehydrator to which a filtrate vacuum suction function is applied to perform a vacuum compression dehydration process by closing the pressurized water control valve and the first filtrate discharge valve, and opening the second filtrate discharge valve to drive the second vacuum suction unit .

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