JP6629489B2 - Water treatment filter system for exhaust gas recirculation system - Google Patents

Description

  The present invention relates to a water treatment filter system for an exhaust gas recirculation system, and in particular, after a mixture in which fresh water and a new filter member are mixed flows into a housing body, a new filter member is discharged in a unit filter unit in a procedure. A filter layer is formed by being adsorbed on the surface of the unit filter unit, and then the cleaning body containing the sulfur oxides and foreign matter of particulate matter is mixed with the regenerating filter member to form the housing body. After the water is supplied to the filter layer, the fresh water from which the foreign matter has been removed is discharged through the filter layer. It is intended to be used.

  In general, diesel engines are pointed out as the main culprit of air pollution because diesel engines emit more nitrogen oxides (NOx) and particulate matter due to the characteristics of lean combustion than gasoline engines.

  Nitrogen oxides cause a photochemical reaction by sunlight and induce the generation of ozone to induce respiratory diseases, etc., and fine dust is small dust with a particle diameter of 10 μm or less and easily penetrates the respiratory tract. By adsorbing on the lungs, it affects the bronchi and induces lung cancer.

  By devising a method for solving such a problem, a part of the exhaust gas generated after combustion is resupplied to the combustion chamber, the temperature is lowered upon combustion, and the concentration of oxygen is sensed. Production of nitrogen oxides (NOx) is suppressed.

  However, in the method of suppressing nitrogen oxides, when the exhaust gas is recycled and used, the strongly acidic sulfur oxides (SOx) and particulate matter (fine substances generated during combustion) contained in the exhaust gas are used as they are. Since there is a problem that the combustion efficiency of the engine is significantly reduced as a result of flowing into the engine cylinder, a wiping device for wiping this is required.

  Such a wiping device employs a method of providing a filter in the exhaust duct, but there is a problem that the filter is easily blocked and a large pressure loss is caused, and the electric precipitator does not block. Since the pressure loss is small, it can be easily installed in the exhaust duct.

  Since the electric dust collector is difficult to treat gas components such as SOx in the exhaust gas, there is an electric dust collector that employs a method in which the exhaust gas discharged from the engine is washed to remove SOx and particulate matter (Particulate Matter).

  In addition to the electrostatic precipitating method, a scrubber for gas cleaning is provided as a device for cleaning exhaust gas accompanying combustion discharged from a diesel engine to reduce SOx and particulate matter. The seawater used for washing is supplied to a centrifugal separation unit to remove soot dust, and the seawater from which dust is separated is supplied to an oil removal unit to remove an oil component by a filter and neutralize the seawater from which the oil component has been removed. There has been proposed a wastewater treatment apparatus in which seawater subjected to neutralization treatment is supplied to a gas scrubber and then supplied again to a scrubber for gas cleaning to be subjected to exhaust gas cleaning.

However, the device removes dust and SOx by supplying exhaust gas discharged from a diesel engine to a gas cleaning scrubber and cleaning the exhaust gas with seawater instead of the electric dust collection method. Since a large amount of seawater is used, there is a problem that a large-scale water treatment apparatus for treating wastewater containing dust is desired.

  In addition, since the structure of the filter used for water treatment is complicated, there is a problem that the additional cost involved in manufacturing and handling the filter is high.

Republic of Korea Published Patent Application No. 10-2015-92315 (August 12, 2015)

  SUMMARY OF THE INVENTION The present invention increases the filtering efficiency of a water treatment filter system, thereby enabling the filter member to be reused, thereby reducing the cost associated with manufacturing and handling the filter.

  Further, the buffer tank unit is configured such that, while the cleaning contaminated water flows into the buffer tank and the flowing cleaning contaminated water is supplied to the water treatment unit by the first pump, sludge reduction is performed on the suction side of the first pump. The regeneration filter member discharged from the unit is disposed so as to be mixed, and a part of the fresh water discharged from the water treatment unit is supplied to and discharged from the buffer tank.

  Further, the housing body has a cylindrical inlet formed with a flange at a lower portion, a coupling opening having a flange formed at an upper portion, and an outer portion of a lower portion of the housing body is supported by a fixed frame. I do.

  Furthermore, the filter fixing piece has a through hole formed along the circumference of the fixing piece body having a disk shape, a step-shaped female screw hole formed inside the fixing piece body, and the fixing piece body. And an air inflow hole formed so as to face from the outer peripheral edge to the inside and the lower part.

  Further, the unit filter unit is coupled to a support bar having an upper male screw portion and a lower male screw portion formed at an upper end portion and a lower end portion, a coil member fitted into the support bar, and a lower portion of the coil member. A lower end cap, a lock nut that passes through the lower end cap and is screwed into a lower male screw portion exposed at a lower portion, an upper end cap that is coupled to an upper portion of the coil member, and penetrates the upper end cap. And a lock nut screwed into the upper male screw portion exposed at the top.

  Still further, the coil member is formed such that a steel material having a square cross section is spirally wound, and a gap between one side and the other side spirally wound is 20 to 58 μm. Features.

  Furthermore, the lower end cap is characterized in that a guide projection having a lower through hole projecting upward is formed at the center of the bottom surface of the lower end cap body having a cylindrical shape with only the upper part opened. I do.

Still further, the upper end cap has an upper end cap body having a polygonal shape, a male screw member projecting stepwise below the upper end cap body, and an inside of an upper part of the upper end cap body from a lower part of the male screw member. A guide recess formed so as to have a stepped shape toward the upper surface, an upper through-hole formed on the ceiling side of the guide recess, and a discharge passage hole formed around the upper through-hole. It is characterized by.

  Furthermore, the discharge passage hole is formed to have a sector shape.

  The sludge reduction unit includes a sludge tray in which the mixed sludge of the waste filter member discharged from the water treatment unit is collected, and a sludge mixed with the waste filter member from the sludge tray via the third pump. The supplied hydrocyclone, a body feed tank in which a regeneration filter member separated from the hydrocyclone gathers, a sludge tank in which sludge separated from the hydrocyclone gathers, and a fourth pump from the body feed tank The regeneration filter member is supplied to the suction side of the first pump.

  According to the present invention, the new filter member is adsorbed on the surface of the unit filter unit by a procedure in which the mixture of the fresh water and the new filter member flows into the inside of the housing body, and then the fresh water escapes to the unit filter unit. After the washing contaminated water containing sulfur oxides and foreign matter of particulate matter is supplied to the housing body in a state of being mixed with the regenerating filter member, then through the filter layer The effect is obtained that only clear water from which foreign matter has been removed is discharged.

  Further, through this, the regenerated filter member cuts into the surface of the filter layer by a predetermined depth, thereby obtaining an effect of preventing the filter layer from being clogged.

  Further, if the efficiency of the filter layer adsorbed on the unit filter unit is reduced, air is supplied from the outside to separate and remove the filter layer, and then a new filter layer is formed by a new filter member. Is used through the repetition of the procedure for disposing the water treatment, the effect of reducing the implementation cost for performing the water treatment can be obtained.

  Furthermore, by separating the waste filter member and the sludge from the sludge mixed with the waste filter member discharged to the outside of the housing body, the regenerated filter member separated from the sludge can be supplied to the housing body again. The effect that the implementation cost can be further reduced is obtained.

  Furthermore, by making the coil member of the unit filter unit have a rectangular cross section, there is an effect that the spacing maintaining protrusion is accurately positioned between the coil members in the procedure of coiling the coil member. At the same time, an effect is obtained that twisting can be prevented in the procedure urged by the upper end cap and the lower end cap.

  By maintaining a constant gap between the coil members by the gap maintaining projection, a filter layer having a uniform gap can be obtained.

The perspective view which shows the water treatment filter part in the water treatment filter system for exhaust gas recirculation systems which concerns on this invention. Exploded perspective view showing a water treatment filter section in a water treatment filter system for an exhaust gas recirculation system according to the present invention. FIG. 4 is a longitudinal sectional view showing a water treatment filter unit in the water treatment filter system for an exhaust gas recirculation system according to the present invention. FIG. 1 is a block diagram showing a water treatment filter system for an exhaust gas recirculation system according to the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a water treatment filter unit in a water treatment filter system for an exhaust gas recirculation system according to the present invention. FIG. 2 is a perspective view showing a water treatment filter unit in the water treatment filter system for an exhaust gas recirculation system according to the present invention. FIG. 3 is an exploded perspective view showing the water treatment filter unit in the water treatment filter system for an exhaust gas recirculation system according to the present invention. FIG. 4 is a longitudinal sectional view showing the water treatment filter unit, and FIG. It is a block diagram showing a water treatment filter system.

  As shown in FIG. 4, the water treatment filter system for an exhaust gas recirculation system according to the present invention includes a buffer tank unit BTU, a water treatment unit WTU, and a sludge reduction unit SRU, and the buffer tank unit BTU includes a receiving unit. The water treatment unit WTU is provided so as to be supplied with the cleaning contaminated water PW from the tank unit RTU, and the regeneration filter member discharged from the sludge reduction unit SRU to the cleaning contaminated water PW discharged from the buffer tank unit BTU. It is arranged so that mixed contaminated water mixed with RP is supplied.

  The buffer tank unit BTU draws in the first pump P1 while the cleaning contaminated water PW flows into the buffer tank BT and the flowing cleaning contaminated water PW is supplied to the water treatment unit WTU by the first pump P1. The regeneration filter member RP discharged from the sludge reduction unit SRU is arranged on the side so as to be mixed. At this time, the buffer tank BT is arranged so that a part of the fresh water FW discharged from the water treatment unit WTU is supplied and discharged.

  The water treatment unit WTU includes one or more water treatment filter units A, and the water treatment filter unit A is constituted by a pre-coating tank PCT in which a new filter member NP is supplied by a second pump P2. I have.

  Here, as shown in FIGS. 1 to 3, the water treatment filter unit A includes a housing body 100, a filter fixing piece 200 provided on the upper part of the housing body 100, and the housing body 100 by the filter fixing piece 200. And a unit filter unit 300 and a housing cap 400 fitted inside.

  The housing body 100 has a cylindrical inlet port 110 having a flange F at a lower portion, and is connected to a pipeline in which a first pump P1 is provided in a buffer tank unit BTU. A connection port 120 having a flange F at an upper portion is formed, and is connected to a pipeline so that fresh water FW can be supplied to the buffer tank unit BTU and the pre-coating tank PCT.

Before the pre-coating tank PCT supplies the cleaning contaminated water PW to the inside of the housing body 100, the new filter member NP mixed with fresh water is supplied through the second pump P2 so that the unit filter By being adsorbed on the surface of the coil member 320 of the unit 300 so as to have a predetermined thickness, the filter layer FL can be formed. The new filter member NP is made of a porous material, and diatomaceous earth is preferably used as the porous material. In addition to such diatomaceous earth, charcoal and other porous materials can be used.

  The housing body 100 is provided with a sight glass SG on both sides thereof, and a foreign matter discharge port 130 for discharging sludge and a waste filter member DP is provided outside a lower end where the inflow port 110 is formed. ing.

  The filter fixing piece 200 separates the internal space of the housing body 100 from the internal space of the housing cap 400 while the unit filter unit 300 is stably fixed. Is provided so as to provide a function of disassembling the filter layer FL formed on the surface of the substrate and discharging the filter layer FL to the foreign matter discharge port 130.

  The filter fixing piece 200 has a through hole 211 formed around a fixing piece body 210 having a disk shape so that the filter cap 200 can be stably coupled between the housing body 100 and the housing cap 400 with a bolt B. At least one stepped female screw hole 212 is formed in the fixed piece body 210 so that the unit filter unit 300 can be stably connected.

  An air inlet 213 is formed at an outer peripheral edge of the fixed piece body 210 so as to face the inside and the lower part of the fixed piece body 210 from the surface, and a pipeline is connected to an air supply port (not shown) so that the housing body 100 is formed. When high-pressure air is supplied or jetted into the inside, the inside is cleaned so that the waste filter member DP and sludge are removed.

  The filter fixing piece 200 is disposed between the housing body 100 and the housing cap 400 with the seal rings S abutting on the upper and lower parts, respectively, so that watertightness can be maintained.

  The unit filter unit 300 includes a support bar 310, a coil member 320, a lower end cap 330, a lock nut LN and an upper end cap 340, and the support bar 310 has upper and lower ends respectively. An upper male screw portion 311 and a lower male screw portion 312 are formed, and are fitted so that the coil member 320 has a shape penetrating therethrough.

  A lower end cap 330 is fitted to the support bar 310 exposed through the lower portion of the coil member 320, and a lock nut LN is coupled to the lower male screw portion 312 exposed through the lower end cap 330. It is arranged so that the loosening phenomenon can be prevented.

  An upper end cap 340 is coupled to an upper portion of the coil member 320, and a lock nut LN is screwed into an upper male screw portion 311 which is exposed through the upper end cap 340 so that a loosening phenomenon can be prevented. Has been deployed.

  The coil member 320 is formed such that a steel wire SW having a square cross section is spirally wound, and a gap C between one side and the other side spirally wound is formed. After the foreign substances contained in the cleaning contaminated water PW are removed, only the fresh water can be passed.

  Such a gap C preferably has a thickness of 20 to 58 μm, and as a material of the new filter member NP used at this time, it is preferable to use diatomaceous earth having a diameter of 40 to 60 μm. At this time, it is possible to prevent the new filter member NP from coming out through the gap C. In the present invention, the gap C has a width of 20 to 58 μm. However, in the case where foreign matter having large particles is included, the gap C may have a distance of 120 μm or more.

  On the other hand, since the coil member 320 has a rectangular cross section, as shown in the lower left part of FIG. 2, the spacing maintaining projection SP having a constant spacing on the upper surface of the steel wire SW before coiling is formed in the longitudinal direction. In the case of coiling using a steel wire SW having a rectilinear shape and a square cross section formed so as to be repeated, the spacing maintaining projection SP is prevented from being twisted, and the gap maintaining projection SP is formed on one side and the other side, or on the upper side. It can be deployed in a precise position between the lower part. That is, when the coiling process is performed by fixing a surface other than the surface on which the spacing maintaining projection SP is formed to the steel wire SW, the twisting of the steel wire SW can be prevented, and through this, the one side of the coil member 320 and The distance maintaining projection SP can be located between the other side.

  The lower end cap 300 has a cylindrical shape in which only the upper part is opened, and a guide projection 333 having a lower through hole 332 projecting upward is formed at the center of the bottom surface of the lower end cap body 331. Thus, the support bar 310 is provided so as to prevent the floating movement in the direction perpendicular to the shaft when the support bar 310 is fitted so as to penetrate.

  The lower end cap 300 is maintained in a state where the lower end of the coil member 320 is fitted at a predetermined depth, so that a constant pressure is applied to the coil member 320 as a whole. The gap C having a uniform interval over the entire length can be maintained by the interval maintaining protrusion SP.

  The upper end cap 340 is used to stably fix the upper part of the unit filter unit 300 to the filter fixing piece 200, and only pure water from which foreign matter has been removed by the filter layer FL is disposed inside the housing cap 400. The upper end cap body 341, the male screw member 342, the guide recess 343, the upper through hole 344, and the discharge passage hole 345 are integrally provided.

  Here, the upper end cap body 341 is a scheme devised to facilitate assembly and disassembly, and is formed so that an outer part, that is, an outer peripheral edge has a polygonal shape. 342 is formed in a lower part of the upper end cap body 341 so as to protrude in a step-like manner, and is provided so as to be screwed into the female screw hole 212.

  The guide recess 343 is formed to have a stepped shape from the lower part of the male screw member 342 toward the inside of the upper part of the upper end cap body 341, and the upper end of the coil member 320 of the unit filter unit 300 has a predetermined depth. The coil member 320 is provided so as to prevent the upper end portion of the coil member 320 from being twisted.

  The upper through-hole 344 is formed on the ceiling side of the guide recess 343 so that water from which foreign matter that has moved upward through the inside of the coil member 320 flows smoothly flows through the upper through-hole 344. The housing cap 400 is provided so as to be able to be discharged through the discharge passage hole 345 formed around the hole 344.

  Such a discharge passage hole 345 allows foreign matter to be discharged while the upper male screw 311 formed at the upper end of the support bar 310 penetrates and is stably fixed to the lock nut LN. This is a scheme devised to make it easy to discharge water, and preferably has a sector shape.

  An inlet 110 is formed at a lower portion of the housing body 100, and an outlet 410 is formed at the housing cap 400, so that a mixture of water and diatomaceous earth through the inlet 110 is formed. After the inflow, the mixture passes through the unit filter unit 300 and the filter fixing piece 200, and is discharged to the outlet 410, and the diatomaceous earth of the mixture that has flowed in is adsorbed on the surface of the unit filter unit 300 to form the filter layer FL. become.

  In the sludge reduction unit SRU, the mixed sludge of the waste filter member DP is discharged from the water treatment unit WTU, the waste filter member DP is separated from the discharged sludge, and stored in the regeneration filter member RP. The filter member RP is provided so as to be mixed with the cleaning contaminated water PW discharged from the buffer tank unit BTU.

  In such a water treatment filter system for an exhaust gas recirculation system, first, before water treatment is performed, a new filter member NP mixed with fresh water from the pre-coating tank PCT is supplied to the water treatment filter unit A by the second pump P2. The new filter member NP into which the fresh water flows into the housing body 100 through the inlet 110 is mixed with the fresh filter water NP that flows into the housing body 100, and a gap C formed in the coil member 320 of the unit filter unit 300 is formed. After that, only fresh water escapes through the gap C in a procedure of being discharged through the upper through hole 344 and the discharge passage hole 345 of the upper end cap 340 connected to the filter fixing piece 200, and the new filter member NP Through the repetition of the phenomenon that Filter layer FL is formed to have a predetermined thickness on the surface of 320.

  Next, the cleaning contaminated water PW is supplied to the buffer tank BT of the buffer tank unit BTU, and the cleaning contaminated water PW supplied to the buffer tank BT is supplied to the housing body 100 by the first pump P1 in the sludge reduction unit. By the regeneration filter member RP being supplied by the fourth pump P4 of the SRU and being supplied in a mixed state, the state in which the regeneration filter member RP bites into the filter layer FL by a predetermined depth is repeated, It is possible to prevent the clogging phenomenon and prevent the filtering rate from decreasing.

  Next, the contaminated water is washed by the filter layer FL disposed outside the coil member 320 in a procedure of discharging through the discharge passage hole 345 of the upper end cap 340 disposed on the upper part of the unit filter unit 300 and the housing cap 400. By removing the oil and particulate matter contained in the PW, only fresh water can be discharged.

  Next, in a procedure in which only fresh water is discharged after being filtered by the filter layer FL, the sludge and the waste filter member DP are collected on the sludge tray STY of the sludge reduction unit SRU, and then the waste filter member DP is collected by the third pump P3. Is supplied to the hydrocyclone HS, and the waste filter member DP and the sludge are separated by centrifugal force.

Next, the waste filter member DP separated from the sludge is regenerated by the regenerating filter member RP and stored in the body feed tank BFT, and the stored regenerated filter member RP is separated into the cleaning contaminated water PW by the fourth pump P4. By being included and flowing into the inside of the housing body 100, it is possible to continue using the housing. At this time, the sludge separated from the waste filter member DP may be processed so as to collect in the sludge tank STK.

BTU buffer tank unit DP waste filter member RP regeneration filter member RTU receiving tank unit SRU sludge reduction unit WTU water treatment unit 100 housing body 110 inflow port 120 connection port 200 filter fixing piece 210 fixing piece body 211 through hole 212 female screw hole 213 inflow hole 300 unit filter unit 310 support bar 311 upper male screw part 312 lower male screw part 320 coil member 330 lower end cap 340 upper end cap 400 housing cap 410 outlet

Claims (10)

A buffer tank unit supplied with cleaning contaminated water from the receiving tank unit,
A water treatment unit that is supplied with mixed contaminated water in which the regeneration filter member discharged from the sludge reduction unit is mixed with the cleaning contaminated water discharged from the buffer tank unit,
The mixed sludge of the waste filter member is discharged from the water treatment unit, the waste filter member is separated from the discharged sludge and stored in the regeneration filter member, and the stored regeneration filter member is discharged from the buffer tank unit. A sludge reduction unit arranged to be mixed with the washed contaminated water,
With
The water treatment unit includes one or more water treatment filter units, and a pre-coating tank in which a new filter member is supplied to the water treatment filter unit by a second pump.
The water treatment filter unit includes a housing body, a filter fixing piece disposed on an upper part of the housing body, a unit filter unit fitted inside the housing body by the filter fixing piece, and a filter mounted on the filter fixing piece. And a housing cap that is placed and bolted together,
An inlet is formed at a lower portion of the housing body, an outlet is formed in the housing cap, and a mixture in which fresh water and the new filter member are mixed flows in through the inlet, and then the mixture becomes a unit filter unit. Water treatment for an exhaust gas recirculation system, characterized in that a new filter member of a mixture that has flowed in a procedure of being discharged to an outlet through a filter fixing piece is adsorbed on the surface of the unit filter unit to form a filter layer. Filter system.   The buffer tank unit is configured such that the cleaning contaminated water flows into the buffer tank, and the supplied cleaning contaminated water is supplied to the water treatment unit by the first pump. The exhaust gas recycling device according to claim 1, wherein the discharged regeneration filter member is arranged to be mixed, and a part of fresh water discharged from a water treatment unit is supplied and discharged to the buffer tank. Water treatment filter system for circulation system.   The housing body may have a cylindrical inlet having a flange at a lower portion, a connection opening having a flange at an upper portion, and a lower portion of the housing body supported by a fixed frame. Item 2. A water treatment filter system for an exhaust gas recirculation system according to Item 1. The filter fixing piece,
A through-hole formed along the circumference of the fixed piece body having a disc shape,
A step-shaped female screw hole formed inside the fixed piece body,
An air inflow hole formed so as to face inward and downward from the outer peripheral edge of the fixed piece body,
The water treatment filter system for an exhaust gas recirculation system according to claim 1, comprising: The unit filter unit,
A support bar having an upper male screw part and a lower male screw part formed at the upper end and the lower end, respectively;
A coil member fitted into the support bar,
A lower end cap coupled to a lower portion of the coil member;
A lock nut screwed into the lower male screw portion exposed at the bottom through the lower end cap,
An upper end cap coupled to an upper portion of the coil member,
A lock nut screwed into the upper male screw portion that is exposed at the top through the upper end cap,
The water treatment filter system for an exhaust gas recirculation system according to claim 1, comprising:   The coil member is formed such that a steel wire having a square cross section is spirally wound, and a gap between one side and the other side spirally wound is 20 to 58 μm. The water treatment filter system for an exhaust gas recirculation system according to claim 5.   The lower end cap is formed with a guide protrusion having a lower through hole protruding upward at a center of a bottom surface of a lower end cap body having a cylindrical shape with only an upper part opened. 6. The water treatment filter system for an exhaust gas recirculation system according to 5. The upper end cap,
An upper end cap body having a polygonal shape,
A male screw member protruding in a step shape at the lower part of the upper end cap body,
A guide recess formed so as to have a stepped shape from the lower part of the male screw member toward the inside of the upper part of the upper end cap body,
An upper through-hole formed on the ceiling side of the guide recess,
A discharge channel hole formed around the upper through-hole,
The water treatment filter system for an exhaust gas recirculation system according to claim 5, comprising:   The water treatment filter system for an exhaust gas recirculation system according to claim 8, wherein the discharge passage hole is formed to have a sector shape. The sludge reduction unit,
A sludge tray for collecting sludge mixed with waste filter members discharged from the water treatment unit,
A hydrocyclone to which the mixed sludge of the waste filter member is supplied from the sludge tray via a third pump;
A body feed tank in which regeneration filter members separated from the hydrocyclone gather,
A sludge tank in which sludge separated from the hydrocyclone is collected,
The water treatment filter system for an exhaust gas recirculation system according to claim 1, wherein a regeneration filter member is supplied from the body feed tank to a suction side of the first pump via a fourth pump.