KR102511082B1 - Comprehensive pretreatment device for sewage and wastewater - Google Patents

Abstract

The present invention is to provide a comprehensive pretreatment device for sewage and wastewater, which comprises a main chamber, a pressure reduction unit, an aeration unit, a sediment and impurity removal unit, a trough type outlet, and a variable outlet weir, to reduce the pressure of sewage and wastewater introduced to be treated, successively and simultaneously remove impurities and sediments in single equipment immediately after separating the impurities and the sediments from the introduced water, and discharge treated water with oil and scum removed therefrom. Accordingly, the effect of maximizing the treatment efficiency of wastewater can be provided, and in particular, by removing even the oil and scum of organic substances, the effect of providing treated water in a cleaner state can be provided with more excellent treatment efficiency.

Description

Ha, comprehensive pretreatment device for sewage and wastewater}

The present invention relates to a comprehensive pretreatment device for sewage and wastewater, and more particularly, immediately after reducing the pressure of sewage and wastewater (hereinafter referred to as 'influent') to be treated, and then separating impurities, sand and organic matter from the influent. It relates to a comprehensive pretreatment device for wastewater that can sequentially and simultaneously remove impurities and sediment in one facility and then discharge treated water in which oil and scum are removed.

In general, a comprehensive pretreatment device for treating sewage and wastewater includes an impurities removal facility for removing impurities (paper, vinyl, etc.) and a sediment removal facility for removing sediment such as soil and sand through sedimentation.

However, as the water treatment method was converted from the conventional confluence type to the split type, as sewage and wastewater were collected and treated at once, the amount of inflow into the pretreatment device increased, and organic matter such as impurities and sand was deposited, and the process of discharging impurities and sand The problem of causing severe odor and secondary pollution is becoming more and more serious.

In addition, recently, along with the advancement of the water treatment process, the water treatment process, which has gone through several steps, has been simplified and water treatment is performed with only the pre-treatment process and the reaction treatment process. This has resulted in a problem in that the reaction efficiency is lowered and the failure of the reaction treatment equipment is frequent.

Accordingly, it is necessary to separate and remove foreign substances of the smallest size as possible in the pretreatment process to reduce the load in the reaction treatment process and increase the reaction treatment efficiency, and to remove and discharge impurities removed from the pretreatment process and organic matter deposited in the sediment. By doing so, it is important to prevent the occurrence of odor and secondary pollution in the process of discharging impurities and sand.

Conventional prior art related to the comprehensive preprocessor as described above is as follows.

First, as disclosed in Korean Patent Registration No. 10-0555142 (hereinafter referred to as 'Patent Document 1'), various impurities such as sludge along with sediment contained in wastewater can be separated and collected in a consistent process An air supply pipe connected to an air blower and a solenoid valve is embedded inside the drive tube of the circular grit tank, and a small chamber for storing high-pressure air is formed around the suction part formed at the end, so that two discharge nozzles move upward from 180° to 3 A technique for a comprehensive pretreatment device and removal of sediment from water, sewage, and wastewater, which is installed in a twisted manner and is provided with a tornado block having a mountain portion formed at the center of the lower surface of the pit, has been posted.

In addition, as disclosed in Korean Patent Publication No. 10-2009-0093772 (hereinafter referred to as 'Patent Document' 2), the main housing, screen filter, discharge unit, and transfer screw are installed to continuously filter out sediment and impurities. And technologies such as a sewage comprehensive pretreatment device including a dewatering unit have also been proposed.

In addition, as disclosed in Korean Patent Registration No. 10-0988641 (hereinafter referred to as 'Patent Document 3'), fine impurities and odors contained in water, sewage and wastewater and attached to the sediment are removed, and the sediment is separated separately. To prevent clogging of pumps and pipes in the subsequent water treatment process and to increase treatment efficiency throughout the process, the sediment sedimentation means includes a main pipe body and a discharge pipe body equipped with a blocking check valve to treat water, sewage, and wastewater in the main body. A technology such as a comprehensive pretreatment device for water, sewage, and wastewater that can be circulated to induce rapid sedimentation of sand has also been proposed.

In addition, as disclosed in Korean Patent Registration Publication No. 10-1963372 (hereinafter referred to as 'Patent Document 4'), it is possible to remove impurities as well as fine impurities from those having a large volume sequentially and having a small volume. Along with the removal of impurities, it allows sedimentation to be removed and, in particular, allows impurities having a large volume included in the initial inflow of raw water to be filtered through the longest path possible, and at the same time, smoothly without overload due to discharge of impurities having a large volume. Technologies such as a comprehensive pre-treatment facility to ensure efficient discharge have also been proposed.

However, Patent Literatures 1 to 3 have complex configurations in which a sediment treatment means and an impurities treatment means must be separately provided to treat sand and impurities, as well as the disadvantage of not being able to treat oil or scum included in the influent.

Patent Document 4 has a technical configuration that efficiently removes sediment and impurities, but also has a disadvantage in that its technical configuration is complicated due to having separate processing means for removing sediment and impurities, as well as oil and It has the disadvantage of not being able to handle scum.

Republic of Korea Patent Registration No. 10-0555142 Republic of Korea Patent Publication No. 10-2009-0093772 Republic of Korea Patent Registration No. 10-0988641 Republic of Korea Patent Registration No. 10-1963372

The specific technical solution of the present invention to solve the above conventional problems is to reduce the pressure of wastewater (hereinafter referred to as 'influent') and separate impurities, sediment and organic matter from the influent. It is to provide a comprehensive pretreatment device for wastewater that can sequentially and simultaneously remove impurities and sand in one facility immediately afterward and then discharge treated water in which oil and scum are removed again.

Another specific technical problem of the present invention is to enable more efficient separation of impurities, sand and organic matter.

Another specific technical problem of the present invention is to ensure that oil and scum of organic matter contained in influent can be smoothly removed.

Another specific technical problem of the present invention is to ensure that impurities having a smaller size than the primarily filtered impurities can be smoothly removed again.

The specific technical solutions of the present invention for solving the above specific technical problems are included in the inlet formed on the top of one side, the outlet located at a height lower than the height of the inlet on the other side, and the influent passing through the bottom. a main body chamber including a sediment collection groove formed to be recessed so that the settled sediment settles; a pressure reducing unit for reducing pressure while the inflow water flowing from the inlet port is introduced in a zigzag form with collision from top to bottom; an aeration unit on the side of the pressure reduction unit for desorbing organic matter attached to sand and debris by aeration while having a residence time for the inflow water passing through the pressure reduction unit; A pair of side frames for filtering and removing sediments from which organic substances are separated and settling on the sediment collection groove on the side of the aeration unit, a main screen provided on the front surface of the side frame on the side of the aeration unit, and the side frame a sand and debris removal unit that sequentially and simultaneously collects and removes sand and impurities by each bucket including each rake in a pair of chains rotated in an endless orbit by one driving means on the top; A trough-type outlet in which an outflow baffle is formed at a position higher than the height of the outlet to discharge or collect oil and scum of the organic matter separated from the sand and organic matter and floating on the surface of the water on the side of the sand and impurities removal unit; and a variable type that is elevated from one surface of a blocking panel formed on the bottom surface of the body chamber higher than the height of the outlet so that oil and scum are discharged or collected from the trough-type outlet by adjusting the water level of the outlet baffle at the outlet side. Spill ware; includes.

The pressure reducing unit passes in a zigzag form as the inflow water collides between a support plate formed such that each separation space is formed between the upper and lower surfaces of the main body chamber at the front facing the inlet port, and the support plate and the inner surface of the inlet side, reducing the pressure. Preferably, each pressure reducing plate is formed in at least one zigzag shape, but the pressure reducing plate is either a flat plate inclined downward or bent upward.

The aeration unit has a plurality of diffuser tubes for ejecting air supplied from the outside at regular intervals on the bottom surface of the main body chamber, and a central passage at regular intervals so that inflow water can pass through the upper portion of the plurality of diffuser tubes while having a residence time. A plurality of stop plates are formed, and at least one partition plate provided so that passages are formed on both sides between the plurality of stop plates.

The lower part of the pair of side frames of the sediment and impurities removal unit is formed with a length corresponding to the sediment collection groove to collect and transfer the sediment settled in the sediment collection groove, and the main screen has an inclination angle of around 80° to remove impurities. The frame on the upper side of the main screen is inclined toward the trough-type outlet, and a driving means is formed on the upper side, and a sand discharge chute and a contaminant discharge chute are formed on the lower side.

The trough type discharge port includes a blocking baffle located on the outlet side and an outlet baffle located on the side of the sediment and impurities removal unit.

The variable outlet weir includes an outlet weir that is lifted on each guide rail formed on both sides of the inner surface of the body chamber by an elevating means provided on the upper surface of the main body chamber, and the outlet weir is raised above the upper end of the outlet baffle to obtain oil and discharging the scum and lowering the discharge weir below the upper end of the discharge baffle so that the oil and scum are collected on the water surface.

A double chain rake screen for filtering out small-sized impurities that are not filtered by the main screen may be interposed between the sand and impurities removal unit and the trough-type outlet.

The present invention reduces the pressure of inflow water to be treated, and immediately after separating impurities, sand and organic matter from the influent, removes impurities and sand at the same time sequentially in one facility, and then treats water in a state in which oil and scum are removed again. By discharging it, it has the effect of maximizing the treatment efficiency of sewage and wastewater, as well as providing more and more clean treated water with more excellent treatment efficiency by removing oil and scum of organic matter. .

In addition, the overall structure of the comprehensive pretreatment device can be compacted due to the simple structure by enabling the separation of impurities, sand and organic matter more efficiently by one driving means, and of course, the resulting manufacturing cost can be significantly reduced has an effect

In addition, by enabling the smooth removal of oil and scum of organic substances contained in the influent, it has an effect of providing a higher quality of the treated water.

In addition, it also has an effect of providing the quality of treated water in a more purified state by allowing impurities having a smaller size than those of the primarily filtered impurities to be smoothly removed again.

1 is a perspective view for explaining the present invention;
Figure 2 is a side sectional view according to Figure 1;
Figure 3 is a plan view according to Figure 1;
4 is an enlarged plan view of a main part for explaining the aeration unit of the present invention;
5 is an operation flow chart for explaining the variable type outflow ware of the present invention;
6 is a perspective view for explaining another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, and the present invention is not limited or limited by the embodiments.

1 is a perspective view for explaining the present invention, FIG. 2 is a side cross-sectional view according to FIG. 1, FIG. 3 is a plan view according to FIG. 1, and FIG. 4 is an enlarged plan view of main parts for explaining the aeration unit of the present invention 5 is an operation flow chart for explaining the variable type outlet wear according to the present invention.

As shown, the conventional comprehensive pretreatment device for treating wastewater has a complex configuration in which a sediment treatment means and a impurities treatment means must be separately provided to treat sediment and impurities as described in the background art of the invention. It has the disadvantage of not being able to process oil or scum included in the influent.

In the present invention, after reducing the pressure of the wastewater (hereinafter referred to as 'influent'), the pressure of the wastewater (hereinafter referred to as 'influent') is separated from the influent, and then the impurities and sediment are removed sequentially and simultaneously in one facility immediately after separating the impurities and sediment from the influent. And to provide a comprehensive pretreatment device for wastewater, as long as the treated water in which the scum is removed can be discharged.

A comprehensive pretreatment device for sewage and wastewater according to the present invention (1) includes a body chamber (10), a pressure reduction unit (20), an aeration unit (30), a sediment and impurities removal unit (40), and a trough type outlet (50). And it has a specific technical configuration including a variable outflow weir (60).

The body chamber 10 has an inlet 12 formed on one side of the upper part, an outlet 14 located at a height lower than the height of the inlet 12 on the other side, and the sediment contained in the inflow water passing through the bottom surface is settled. It has a technical configuration including a sand collection groove 16 formed to be recessed as much as possible.

In the above, the main body chamber 10 has a rectangular parallelepiped shape with a predetermined length so that each of the above-mentioned parts can be sequentially arranged, and each surface is blocked, so that necessary driving means or necessary parts of each part protrude upward. Of course, it is formed in the form of a chamber in which the upper part of the sediment and impurities removal unit protrudes, and a plurality of supporting legs 18 having a predetermined interval are installed on both sides.

In addition, the sediment collecting groove 16 is recessed from the bottom surface of the body chamber 10 to efficiently remove the sediment settled by the sediment and impurities removal unit 40, and the aeration unit 30 and It is preferable to form a maximum length between the trough-type outlets 50.

The pressure reducing unit 20 has a technical configuration in which the inflow water flowing from the inlet port 12 is introduced from the top to the bottom in a zigzag form with collision to reduce the pressure.

The specific technical configuration of the pressure reducing unit 20 described above is a support plate 22 formed so that each separation space is formed between the upper and lower surfaces of the body chamber 10 at the front facing the inlet 12, the support plate At least one pressure reducing plate 24 formed in a zigzag form so that the inflow water collides between the inner surface of the inlet 12 and the pressure reducing plate and passes in a zigzag form between the pressure reducing plate 22, the pressure reducing plate (24) is either a downwardly inclined flat plate or an upwardly bent one.

In other words, the inflow water flowing through the inlet is not temporarily introduced into the pressure reducing unit, but falls downward while reducing the pressure while sequentially colliding with each pressure reducing plate, which is a pressure reducing unit. At this time, when colliding with each of the pressure reducing plates, some of the organic matter attached to the sediment or impurities contained in the influent also has a condition in which some separation or adhesion is weakened.

As a result, the inflow water introduced through the inlet is introduced with a significantly reduced pressure than the inflow, and undergoes the following process. It also has additional conditions that can further increase the efficiency of desorption of organic matter in the aeration unit.

The aeration unit 30 has a technical configuration in which the inflow water passing through the pressure reduction unit 20 has a residence time on the side of the pressure reduction unit 20 and desorbs organic matter attached to sediment and impurities by aeration.

The specific technical configuration of the aeration unit 30 is a plurality of diffuser tubes 32 that eject air supplied from the outside at regular intervals on the bottom surface of the body chamber 10, and the plurality of diffuser tubes 32 ) A plurality of stop plates 34 in which central passages are formed at regular intervals so that inflow water can pass while having a residence time at the upper part of the stop plate 34, at least provided to form passages on both sides between the plurality of stop plates 34 It includes one or more dividers (36).

In other words, the aeration unit does not flow into the aeration unit at once in the process of passing the inflow water whose pressure is reduced in the pressure reduction unit, but rotates to the center, left, and right by a plurality of stop plates and dividers to maximize the maximum. It has a long residence time, and at this time, organic matter attached to sediment or impurities is efficiently desorbed by air ejected from a plurality of diffusion pipes provided at the bottom.

In this way, the organic matter separated from sediment and impurities flows on the water surface in a floating state due to the nature of the organic matter.

The sediment and impurities removal unit 40 includes a pair of side frames 42 for filtering and removing impurities after the sediment from which organic substances are separated settles on the sediment collection groove 16 on the side of the aeration unit 30, The main screen 44 provided on the front surface of the side frame 42 on the side of the aeration part 30, and a pair of chains rotated in an endless orbit by one driving means 42 on the side frame 44 (46) has a technical configuration in which sand and impurities are sequentially and simultaneously collected by each bucket 47 including each rake 47A and then removed. Each of the rakes is mounted and fixed to the opposite surface of each bucket that comes into contact with the sand collection groove to collect the sand, and scrapes and removes impurities caught on the main screen.

In the specific technical configuration of the sediment and impurities removal unit 40, the lower part of the pair of side frames 42 is formed to a length corresponding to the sediment collection groove 16, and the sediment settled in the sediment collection groove 16 is collected and transported, and the main screen 44 has an inclination angle of about 80 ° so that impurities are caught, and the side frame 42 on the upper side of the main screen 44 has the trough-type outlet ( 50) It is formed inclined toward the side, and the driving means 45 is formed on the upper side, and the sediment discharge chute 48 and the impurity discharge chute 48A are formed on the lower side. At the lower part of the sand discharge chute and the impurities discharge chute, each transfer conveyor or each discharge container for transporting the fallen sand or impurities is installed. The main screen may have a coarse screen or a detailed screen installed according to site conditions, and the screen bar of the main screen may be formed in a bar shape, a wedge bar shape, or a rectangular cross section.

In addition, it is preferable to include a tension adjusting member having a conventional structure for adjusting the tension of a pair of chains rotated in a crawler manner on the upper side of the side frame.

In addition, the pair of chains 46 are driven by a pair of drive sprockets rotated by one driving means 45 including a motor and a reducer, a pair of driven sprockets, and a pair of idle sprockets to form an endless track. It is rotated in an endless way on each side frame 42, and each rake 47A for collecting impurities hanging on the main screen 44 is attached to the pair of chains 46 It is installed on one side of each bucket 47 for collecting the sediment settled in the sediment collection groove 16.

Accordingly, by a bucket including each rake provided in a pair of chains rotated in an endless orbit by one driving means, that is, the sediment settled into the sediment collection groove is sequentially collected and transported by the bucket, At the same time, the impurities caught on the main screen are also sequentially and simultaneously collected by the rake, and then carried out through the sediment discharge chute and the impurities discharge chute provided on the bottom of the upper side of the side frame. It has conditions that can maximize the removal efficiency.

In particular, the sediment and impurities removal unit is not provided separately to remove sediment and impurities as in the prior art, but is provided in a pair of chains rotated by one driving means. By sequentially and simultaneously removing the impurities, it is possible to significantly reduce the manufacturing cost due to the minimal and simple structure as well as to maximize the removal efficiency.

The trough-type outlet 50 has a height higher than the outlet 14 so that oil and scum of the organic matter separated from the sand and organic matter floating on the surface of the water are discharged or collected on the side of the sand and impurities removal unit 40. It has a technical configuration in which an outflow baffle 52 is formed in place.

The trough type outlet 50 includes a blocking baffle 54 located on the side of the outlet 14 and an outlet baffle 52 located on the side of the sediment and impurities removal unit 40 .

In other words, organic oil and scum floating on the water surface through the sediment and impurities removal unit float on the water surface according to the water level adjustment of the outlet of the variable outlet ware described later, that is, when the water level is higher than the top of the outlet baffle. The oil and scum that had been made are discharged to the outside along with some of the supernatant water through the trough-type discharge port beyond the outflow discharge.

Conversely, when the water level is adjusted lower than the outlet baffle by the variable outlet wear, oil and scum are collected on the surface of the water by the outlet baffle again.

In the above, the treated water from which oil and scum are removed is discharged to the outside through the outlet through the lower portion of the trough-type outlet, beyond the variable outlet ware.

The variable outlet wear 60 adjusts the water level of the outlet baffle 52 on the side of the outlet 14 so that oil and scum are discharged or collected at the trough-type outlet 50 at the bottom of the body chamber 10. It has a technical configuration that is lifted from one side of the blocking panel 62 formed higher than the height of the outlet 14 on the surface.

The specific technical configuration of the above-described variable outflow weir 60 is each guide rail 66 formed on both sides of the inner surface of the body chamber 10 by the elevating means 64 provided on the upper surface of the body chamber 10. ), wherein the outlet ware 68 is elevated above the top of the outlet baffle 52 to discharge oil and scum, and the outlet ware 68 is lower than the top so that oil and scum are collected on the water surface.

In the above, the upper end of the discharge weir is formed lower than the upper end of the discharge discharge in normal times, so that the oil and scum are collected on the water surface without being discharged by the discharge discharge. At this time, treated water in a state in which oil and scum are collected is discharged through the outlet after passing through the lower portion of the trough-type outlet and the upper portion of the variable outlet weir.

In addition, when oil and scum are collected on the surface of the water by the outflow baffle, the upper end of the outflow ware is raised than the upper end of the outflow baffle by the elevating means to raise the water level, so that the oil and scum collected on the water surface are removed from the outflow baffle. It is removed as it is discharged to the outside together with a part of the treated water through the trough-type discharge port beyond the

In this way, when the removal of oil and scum is completed, the upper end of the outflow ware is lowered than the upper end of the outflow baffle, so that oil and scum are collected again on the water surface by outflow discharge.

Therefore, the present invention does not have a complicated technical configuration, but immediately after reducing the pressure of the inflow water to be treated, and then separating impurities, sediment and organic matter from the influent, the impurities and sediment are sequentially and simultaneously removed in one facility, and then oil and By allowing treated water with scum removed to be discharged, conditions for maximizing the treatment efficiency of sewage and wastewater can be established, as well as conditions for excellent treatment efficiency by separating and removing organic matter. there is.

In addition, it is possible to reduce the inflow pressure of the influent and maximize the desorption efficiency of organic matter due to aeration.

In addition, by sequentially and simultaneously processing sediment and impurities by one driving means, the treatment efficiency of sediment and impurities can be maximized with a simple structure, as well as a condition in which the resulting manufacturing cost can be remarkably reduced. have

In addition, organic matter and scum are quickly and smoothly discharged with a simple structure and principle rather than a complex structure, so that treated water in a clean state can be provided.

6 is a perspective view for explaining another embodiment of the present invention.

As shown in the above configuration, a technical configuration capable of cleanly removing small-sized contaminants that are not removed by the sediment and contaminant removal unit is also provided.

Between the sediment and contaminant removal unit 40 and the trough-type discharge port 50, a double chain rake screen 70 is interposed to filter out small-sized contaminants that are not filtered by the main screen 44 again. do.

Since the above double chain rake screen has the same technical configuration as well as the same operational effect as disclosed in Patent Document 4, which is the prior registration right of the present applicant, specific technical configuration and operational effects are omitted.

Accordingly, the double chain rake screen 70 filters and removes small-sized impurities that are not removed in the sediment and impurities removal unit, so that it can have a condition capable of providing more quality treated water.

1: Comprehensive preprocessor
10: body chamber 12: inlet
14: Outlet 16: Grit collection groove
20: pressure reducing unit 22: support plate
24: pressure reducing plate 30: aeration unit
32: diffuser 34: low plate
36: partition plate 40: sediment and impurities removal unit
42: side frame 44: main screen
45: driving means 46: chain
47: Bucket 47A: Rake
48: sediment discharge chute 48A: impurities discharge chute
50: trough type outlet 52: outflow baffle
54: blocking baffle 60: variable outflow weir
62: blocking panel 64: lifting means
66: guide rail 68: leak wear
70: Double chain rake screen

Claims (7)

A body chamber including an inlet formed on one side, an outlet located at a height lower than the height of the inlet on the other side, and a sediment collection groove formed to be recessed so that the sediment contained in the influent passing through the bottom is settled;
a pressure reducing unit for reducing pressure while the inflow water flowing from the inlet port is introduced in a zigzag form with collision from top to bottom;
an aeration unit on the side of the pressure reduction unit for desorbing organic matter attached to sand and debris by aeration while having a residence time for the inflow water passing through the pressure reduction unit;
A pair of side frames for filtering and removing sediments from which organic substances are separated and settling on the sediment collection groove on the side of the aeration unit, a main screen provided on the front surface of the side frame on the side of the aeration unit, and the side frame a sand and debris removal unit that sequentially and simultaneously collects and removes sand and impurities by each bucket including each rake in a pair of chains rotated in an endless orbit by one driving means on the top;
A trough-type outlet in which an outflow baffle is formed at a position higher than the height of the outlet to discharge or collect oil and scum of the organic matter separated from the sand and organic matter and floating on the surface of the water on the side of the sand and impurities removal unit; and
A variable type outlet that is raised and lowered from one surface of a blocking panel formed on the bottom surface of the body chamber higher than the height of the outlet so that oil and scum are discharged or collected in the trough type outlet by adjusting the water level of the outlet baffle at the outlet side. Ware; Comprehensive pretreatment device for wastewater, including a. According to claim 1,
The pressure reducing unit passes in a zigzag form as the inflow water collides between a support plate formed such that each separation space is formed between the upper and lower surfaces of the main body chamber at the front facing the inlet port, and the support plate and the inner surface of the inlet side, reducing the pressure. It includes each pressure reducing plate formed in at least one zigzag shape as much as possible, but the pressure reducing plate is any one of a flat plate inclined downward or bent upward, and a comprehensive pretreatment device for wastewater. According to claim 1,
The aeration unit has a central passage at regular intervals so that inflow water can pass through a plurality of diffuser pipes on the bottom surface of the main body chamber at regular intervals, and an upper portion of the plurality of diffuser pipes for ejecting air supplied from the outside. Comprehensive wastewater pretreatment apparatus comprising a plurality of stop plates formed, at least one partition plate provided so that passages are formed on both sides between the plurality of stop plates. According to claim 1,
The lower part of the pair of side frames of the sediment and impurities removal unit is formed with a length corresponding to the sediment collection groove to collect and transfer the sediment settled in the sediment collection groove, and the main screen has an inclination angle of around 80° to remove impurities. is formed to hang, and the side frame on the upper side of the main screen is formed inclined toward the trough-type discharge port, and the driving means on the upper side and the sediment discharge chute and the impurities discharge chute are formed on the lower side, wastewater Comprehensive preprocessing device for According to claim 1,
The trough-type discharge port includes a blocking baffle located on the outlet side and an outlet baffle located on the side of the sediment and impurities removal unit, and a comprehensive pretreatment device for wastewater. According to claim 1,
The variable outlet weir includes an outlet weir that is lifted on each guide rail formed on both sides of the inner surface of the body chamber by an elevating means provided on the upper surface of the main body chamber, and the outlet weir is raised above the upper end of the outlet baffle to obtain oil and discharging the scum and lowering the outlet weir below the upper end of the outlet baffle so that the oil and scum are collected on the surface of the water. According to claim 1,
A comprehensive pretreatment device for wastewater further comprising a double chain rake screen for filtering out small-sized impurities that have not been filtered out by the main screen again between the sand and impurities removal unit and the trough-type outlet.

Images