CN112850963A - Sewage filtering and deslagging device - Google Patents

Abstract

The invention discloses a sewage filtering and deslagging device, which comprises a primary filtering deslagging device used for precipitation, bottom sealing, outward discharge and slag scraping; and a second-stage filter residue remover for receiving the first-stage filter residue remover, adjusting the pressure of the filtered water after the first-stage filtration is finished, and sending the sewage into the array type pipe column after the pressure adjustment is finished so as to perform infiltration residue removal; and a third-stage filter slag remover for receiving the output filtered water of the second-stage filter slag remover, pneumatically removing scum and injecting chlorine for disinfection. The sewage filtering and deslagging device adopts three stages of filtering and deslagging, wherein the first stage completes heavy deslagging, the second stage completes medium or light deslagging, and the third stage completes floating oil or scum deslagging; when its filter residue removal effect is good first order slagging-off, can regularly arrange the dregs of old age outward, guarantee that the water is fresh, the twice filtration can be realized in the second level slagging-off, and the third level slagging-off carries out air supporting and disinfection to the drainage through chlorine and pure air, avoids the filter screen to block up.

Description

Sewage filtering and deslagging device

Technical Field

The invention relates to a sewage treatment device, in particular to a sewage filtering and deslagging device, and belongs to the technical field of sewage treatment devices.

Background

Sewage is generated in various fields in production and life, if the sewage is not effectively treated, fresh water resources such as rivers, underground water and the like can be damaged, and serious damage is caused to animals and plants; in the prior art, methods such as sedimentation tank filtration, multi-stage filtration of a filter screen and the like are widely adopted, but the common problems are that impurities cannot be cleaned and collected in time after being filtered, so that part of the impurities flow along with water flow to cause secondary pollution of water, the impurities are accumulated on the surface of the filter screen to block the filter screen, and the filtration effect and the filtration efficiency are seriously influenced; in order to better improve the filtering and deslagging effects, the Chinese patent application No.: 201920964070.7, a sewage filtering and deslagging device, which can realize the cleaning and collection of impurities and the real-time blockage prevention of a filter screen at the same time, but has small treated water amount and can not be applied to the sewage treatment of large amount.

Disclosure of Invention

In order to solve the problems, the invention provides a sewage filtering and deslagging device which can efficiently filter and deslag sewage and has large sewage treatment capacity.

The sewage filtering and deslagging device comprises a primary filtering deslagging device used for precipitation, bottom sealing, outward discharge and slag scraping; and a second-stage filter residue remover for receiving the first-stage filter residue remover, adjusting the pressure of the filtered water after the first-stage filtration is finished, and sending the sewage into the array type pipe column after the pressure adjustment is finished so as to perform infiltration residue removal; and a third-stage filter slag remover for receiving the output filtered water of the second-stage filter slag remover, pneumatically removing scum and injecting chlorine for disinfection; and a tail end water storage tank for receiving the filtered water of the three-stage filtering slag remover.

Furthermore, the primary filtering slag remover comprises a front filtering tank, wherein a water inlet flange is arranged at the upper part of one side of the front filtering tank, and a water discharge flange is arranged at the lower part of the other side of the front filtering tank; an anti-impact plate is arranged at the water inlet flange on the inner side of the front filter tank; an extension pipe is fixed at the bottom of one side of the front filter tank, which is close to the water inlet flange; a slag settling tank is connected in series in the extension pipe; the extension pipe is respectively provided with a valve body at the top and the bottom of the slag settling tank; a partition plate is welded on one side of the front filter tank, which is far away from the extension pipe; a water permeable window is arranged at the upper part of the partition plate; a slide rail is arranged between the two inner walls of the front filtering tank and the partition plate; a scraper which is pressed with the bottom of the front filter tank is arranged on the slide rail in a sliding manner; the scraper is connected to a traction speed reducer through a reciprocating type traction rope; a hollow shutter seat plate is fixed above the slide rail; a row of louver bodies are arranged between the two louver seat plates through bearings; fluted discs are arranged at two ends of the louver body; each row of the fluted discs are installed through chain belt transmission; a belt disc is arranged outside the shutter base plate; the belt disc is fixed on the transmission shaft, and the transmission shaft penetrates through the bearing and is fixed with the belt disc; the reel is connected to a transition disc at the top of the front filtering tank through a transmission belt; the transition disc is connected to an opening and closing motor outside the front filter tank through a transmission belt; a row of partition plates are arranged above the louver bodies in the front filtering tank; the partition plates are arranged from low to high;

the secondary filtering slag remover comprises a middle buffer tank connected with a drainage flange of the front filtering tank; the bottom of the middle buffer tank is connected to a first pressure regulating valve component through a bottom valve; the first pressure regulating valve assembly is connected to a filter pipe; the filter tube penetrates through the lower part of the slag removing tank in a sealing way; the other end of the filter pipe is connected to the transition tank; a blow-down valve is arranged at the bottom of the transition tank; a plurality of threaded holes are formed in the top surface of the filter tube at intervals; a slag removal pipe is screwed on each threaded hole; the bottom of the slag removing pipe is a reducing port; a filter screen plate pressed with the top surface of the deslagging pipe is fixed on the inner side of the deslagging tank; an inner pipe seat is fixed above the filter screen plate of the deslagging tank; a plurality of flow guide rods are fixed at the bottom of the inner tube seat; the guide rod sequentially penetrates through the filter screen plate and the slag removal pipe and extends to the inner side of the filter pipe; the guide rod is provided with a pier-shaped sleeve which is in sliding fit with the inner wall of the slag removing pipe in a sliding way; the bottom of the deslagging tank is hopper-shaped; and is connected to the middle buffer hopper through the first bottom valve; the middle buffer bucket is connected to the outer discharge pipe through a second bottom valve;

the third-stage filtering slag remover comprises a second pressure regulating valve component connected with the lower part of the slag removing tank through a flange; the second pressure regulating valve assembly is connected to the closed floating bin; the bottom of the floating bin is spirally connected with a plurality of pneumatic pipes; the two ends of the pneumatic pipe are of mesh structures; and the inner side of the pneumatic tube is provided with a filter screen body; the bottom of the pneumatic tube is provided with an inflation tube; the inflation pipe is connected to an air supply system; the gas supply system comprises a pure air supply pipeline and a chlorine gas supply pipeline; the pure air supply pipeline and the chlorine gas supply pipeline are respectively connected to the proportional valve; the middle end of the proportional valve is connected to an inflation tube; the floating bin and the pneumatic pipe are both arranged in the water filtering bin; a scum discharge pipe valve is arranged at the end part of the floating bin; the bottom of the water filtering bin is connected to the tail end water storage tank through a pipeline.

Further, the pier-shaped sleeve is a filter screen cover or a pier-shaped cylinder.

Further, the filter tube is of a coil tube or straight tube structure.

Further, the first pressure regulating valve assembly and the second pressure regulating valve assembly comprise an opening valve and a pressure transmitter which are connected in series; the opening valve and the pressure transmitter are linked through a controller.

Further, the tail end water storage tank is connected to a cartridge filter; the security filter is connected to a nanofiltration system or an ultrafiltration system.

Further, the working process of the primary filtering slag remover is as follows:

the sewage is continuously or discontinuously fed into the front filter tank through the water inlet flange, filtered water is discharged through the water discharge flange after being treated in the front filter tank, and when the sewage enters the front filter tank, the sewage is slowly flowed through the impact prevention plate, so that the internal oscillation of the front filter tank caused by external water pressure is avoided; after sewage is subjected to slow flow and isolation sequentially through the partition plate, the settled water flow enters one side of a drainage flange of the front filter tank through the partition plate; the sewage precipitation layer sequentially penetrates through the partition plate and the louver body to slowly descend, the louver body is perpendicular to the front filter tank when penetrating through water for precipitation, the precipitation layer is used for scraping slag periodically to remove old slag so that a water body is kept fresh, the transition disc is driven to rotate through the opening and closing motor and the transmission belt when scraping the slag, the transition disc drives the belt disc and the transmission shaft to rotate, so that the chain belt is driven to rotate through the fluted disc, the louver body rotates 90 degrees in a reverse direction, and the louver body rotates 270 degrees in a forward direction after the slag scraping is completed; re-receiving the sewage and the aged slag and slowly descending; when scraping the sediment, carry out the seal coat through the louver body to sewage, sewage and sediment below the louver body strike off through the scraper blade, and when the sediment was scraped to the scraper blade, scrape the sediment through the reciprocating type haulage rope realization of traction speed reducer drive, be about to the scraper blade and reset, sewage and sediment are scraped into the extension pipe through the scraper blade to fall into the sediment pond, realize the upper end through switching the valve body at last and seal, and sewage and sediment lower extreme blowdown.

Further, the working process of the secondary filtering slag remover is as follows:

after the drainage flange of the first-stage filtering slag remover discharges the filtered water, the filtered water enters the middle buffer tank, after the buffer flow is stored through the middle buffer tank, the water is sent to the first pressure regulating valve component by the bottom valve, the first pressure regulating valve component enables the water pressure to be in a stable state by regulating the water pressure, when the water pressure is lower than a certain threshold value, the first pressure regulating valve component is directly turned off, the filtered water which completes pressure regulation enters the filter pipe and enters the transition tank for transition and steady flow, meanwhile, the filtered water enters the deslagging pipe array through the filter pipe to carry out deslagging, the bottom of the deslagging pipe is provided with a reducing hole, one-step deslagging can be realized, the filtered water which completes pressure stabilization penetrates through the deslagging pipe array and permeates through the top surface of the deslagging pipe array, when the water flow presses to the top of the deslagging pipe, the flow is limited and guided by the guide rod and the pier-shaped sleeve, so that heavy slag can be rapidly precipitated into the filter tube, and finally, the fine heavy slag is discharged outside through the drain valve; after the water flow permeated by the deslagging pipe array is subjected to secondary flocculation or sedimentation through the deslagging tank, filtering water enters a three-stage filtering deslagging device; remove the sediment of little end middlings sediment of sediment jar and enter into middle buffering fill, when needs are discharged little end middlings sediment outward, close first bottom valve, open the second bottom valve to arrange it outward, then, first bottom valve is opened and the second bottom valve is closed, enters into again and holds the stream and deposit the state.

Further, the working process of the three-stage filtering slag remover is as follows:

when the filtered water of the two-stage filtering slag remover is discharged, the water pressure is regulated through the second pressure regulating valve component, so that the water pressure is in a stable state, when the water pressure is lower than a certain threshold value, the second pressure regulating valve component is directly turned off, the filtered water after pressure regulation enters the floating bin, meanwhile, the bottom of the floating bin is aerated through the pneumatic pipe and the air supply system, so that the floating bin is in a balanced state, scum is stopped in the floating bin, the filtered water enters the water filtering bin through the filter screen body, and when the filtered water is pneumatic, the pneumatic pipe is proportionally supplied with air through the chlorine air supply pipeline and the pure air supply pipeline, so that air floatation and disinfection are completed, and a scum discharge pipe valve on the floating bin removes scum; and finally, delivering the filtered water to a tail end water storage tank for storage.

Further, the drainage of the terminal water storage tank is directly applied through a cartridge filter; or the nano-filtration system or the ultrafiltration system is used after secondary treatment.

Compared with the prior art, the sewage filtering and deslagging device adopts three stages of filtering and deslagging, wherein the first stage completes heavy deslagging, the second stage completes medium or light deslagging, and the third stage completes floating oil or scum deslagging; when its filter residue removal effect is good first order slagging-off, can regularly arrange the dregs of old age outward, guarantee that the water is fresh, the twice filtration can be realized in the second level slagging-off, and the third level slagging-off carries out air supporting and disinfection to the drainage through chlorine and pure air, avoids the filter screen to block up.

Drawings

Fig. 1 is a block diagram showing the overall structure of embodiment 1 of the present invention.

Fig. 2 is a schematic diagram of the primary filter cleaner of the present invention.

Fig. 3 is a schematic view of the present invention at a part enlarged in fig. 2.

Fig. 4 is a schematic diagram of the two stage filtration cleaner of the present invention.

Fig. 5 is a schematic view of the structure of the three-stage filtering cleaner of the present invention.

Fig. 6 is a schematic view of the overall structure of the present invention.

Detailed Description

Example 1:

the sewage filtering and deslagging device shown in figure 1 comprises a primary filtering deslagging device used for precipitation, bottom sealing, outward discharge and slag scraping; and a second-stage filter residue remover for receiving the first-stage filter residue remover, adjusting the pressure of the filtered water after the first-stage filtration is finished, and sending the sewage into the array type pipe column after the pressure adjustment is finished so as to perform infiltration residue removal; and a third-stage filter slag remover for receiving the output filtered water of the second-stage filter slag remover, pneumatically removing scum and injecting chlorine for disinfection; and a tail end water storage tank for receiving the filtered water of the three-stage filtering slag remover.

Example 2:

as shown in fig. 2 to 6, the primary filtering and deslagging device comprises a front filtering tank 1, wherein a water inlet flange 2 is arranged at the upper part of one side of the front filtering tank 1, and a water discharge flange 3 is arranged at the lower part of the other side of the front filtering tank 1; an impact-proof plate 4 is arranged at the water inlet flange on the inner side of the front filter tank 1; an extension pipe 5 is fixed at the bottom of one side of the front filter tank 1, which is close to the water inlet flange; a slag settling tank 6 is connected in series in the extension pipe 5; the extension pipe 5 is provided with valve bodies 7 at the top and the bottom of the slag settling tank respectively; a partition plate 8 is welded on one side of the front filter tank 1, which is far away from the extension pipe; a water permeable window 9 is arranged at the upper part of the clapboard 8; a slide rail 10 is arranged between the two inner walls of the front filtering tank 1 and the partition plate 8; a scraper 11 which is pressed with the bottom of the front filter tank is arranged on the slide rail 10 in a sliding manner; the scraping plate 11 is connected to a traction speed reducer 12 through a reciprocating type traction rope; a hollow shutter seat plate 13 is fixed above the slide rail 10; a row of louver bodies 14 are arranged between the two louver seat plates 13 through bearings; fluted discs 15 are arranged at two ends of the louver body 14; each row of the fluted disc 15 is installed through a chain belt 16 in a transmission way; a belt disc 17 is arranged outside the shutter base plate 13; the belt disc 17 is fixed on a transmission shaft, and the transmission shaft passes through a bearing and is fixed with the belt disc; the reel 17 is connected to a transition disc 18 at the top of the front filtering tank through a transmission belt; the transition disc 18 is connected to an opening and closing motor 19 outside the front filter tank through a transmission belt; a row of partition plates 20 are arranged above the louver bodies in the front filtering tank 1; the partition plates 20 are arranged from low to high;

the secondary filtering slag remover comprises a middle buffer tank 21 connected with a drainage flange of the front filtering tank; the bottom of the middle buffer tank is connected to a first pressure regulating valve assembly 22 through a bottom valve; said first pressure regulating valve assembly is connected to the filter tube 23; the filter pipe 23 passes through the lower part of the deslagging tank 24 in a sealing way; the other end of the filter pipe 23 is connected to a transition tank 25; a drain valve 26 is arranged at the bottom of the transition tank 25; a plurality of threaded holes are formed in the top surface of the filter tube 23 at intervals; a slag removal pipe 27 is screwed on each threaded hole; the bottom of the slag removing pipe 27 is a reducing hole; a filter screen plate 28 pressed with the top surface of the deslagging pipe is fixed on the inner side of the deslagging tank 24; an inner pipe seat 29 is fixed above the filter screen plate of the deslagging tank 24; a plurality of guide rods 30 are fixed at the bottom of the inner tube seat 29; the guide rod 30 sequentially penetrates through the filter screen plate 28 and the deslagging pipe 27 and extends to the inner side of the filter pipe 23; the diversion rod 30 is provided with a pier-shaped sleeve 31 which is in sliding fit with the inner wall of the slag removal pipe in a sliding way; the bottom of the slag removing tank 24 is hopper-shaped; and is connected to a middle buffer bucket 33 through a first bottom valve 32; the middle buffer bucket 33 is connected to an outer discharge pipe 35 through a second bottom valve 34;

the three-stage filtering slag remover comprises a second pressure regulating valve component 36 connected with the lower part of the slag removing tank through a flange; the second pressure regulating valve assembly 36 is connected to a closed floating bin 37; a plurality of pneumatic pipes 38 are screwed at the bottom of the floating bin 37; the double ends of the pneumatic tube 38 are in a mesh structure; and the inner side of the pneumatic tube is provided with a filter screen body 39; the bottom of the pneumatic tube 38 is provided with an inflation tube 40; the inflation tube 40 is connected to an air supply system; the gas supply system comprises a pure air supply line 41 and a chlorine supply line 42; the pure air supply line 41 and the chlorine gas supply line 42 are respectively connected to a proportional valve 43; the middle end of the proportional valve 43 is connected to the inflation tube 40; the floating bin 37 and the pneumatic pipe are both arranged in the water filtering bin 44; a scum discharge pipe valve 45 is arranged at the end part of the floating bin 37; the bottom of the water filtering bin 44 is connected to a tail end water storage tank 46 through a pipeline.

Wherein, the pier-shaped sleeve 31 is a filter screen cover or a pier-shaped cylinder. The filter tube 23 is a coil tube or a straight tube structure. The first pressure regulating valve assembly 22 and the second pressure regulating valve assembly 36 comprise an open valve and a pressure transmitter which are connected in series; the opening valve and the pressure transmitter are linked through a controller. The end water storage tank 46 is connected to a cartridge filter; the security filter is connected to a nanofiltration system or an ultrafiltration system.

The working process of the primary filtering slag remover is as follows: the sewage is continuously or discontinuously fed into the front filter tank through the water inlet flange, filtered water is discharged through the water discharge flange after being treated in the front filter tank, and when the sewage enters the front filter tank, the sewage is slowly flowed through the impact prevention plate, so that the internal oscillation of the front filter tank caused by external water pressure is avoided; after sewage is subjected to slow flow and isolation sequentially through the partition plate, the settled water flow enters one side of a drainage flange of the front filter tank through the partition plate; the sewage precipitation layer sequentially penetrates through the partition plate and the louver body to slowly descend, the louver body is perpendicular to the front filter tank when penetrating through water for precipitation, the precipitation layer is used for scraping slag periodically to remove old slag so that a water body is kept fresh, the transition disc is driven to rotate through the opening and closing motor and the transmission belt when scraping the slag, the transition disc drives the belt disc and the transmission shaft to rotate, so that the chain belt is driven to rotate through the fluted disc, the louver body rotates 90 degrees in a reverse direction, and the louver body rotates 270 degrees in a forward direction after the slag scraping is completed; re-receiving the sewage and the aged slag and slowly descending; when scraping the sediment, carry out the seal coat through the louver body to sewage, sewage and sediment below the louver body strike off through the scraper blade, and when the sediment was scraped to the scraper blade, scrape the sediment through the reciprocating type haulage rope realization of traction speed reducer drive, be about to the scraper blade and reset, sewage and sediment are scraped into the extension pipe through the scraper blade to fall into the sediment pond, realize the upper end through switching the valve body at last and seal, and sewage and sediment lower extreme blowdown.

The working process of the secondary filtering slag remover is as follows: after the drainage flange of the first-stage filtering slag remover discharges the filtered water, the filtered water enters the middle buffer tank, after the buffer flow is stored through the middle buffer tank, the water is sent to the first pressure regulating valve component by the bottom valve, the first pressure regulating valve component enables the water pressure to be in a stable state by regulating the water pressure, when the water pressure is lower than a certain threshold value, the first pressure regulating valve component is directly turned off, the filtered water which completes pressure regulation enters the filter pipe and enters the transition tank for transition and steady flow, meanwhile, the filtered water enters the deslagging pipe array through the filter pipe to carry out deslagging, the bottom of the deslagging pipe is provided with a reducing hole, one-step deslagging can be realized, the filtered water which completes pressure stabilization penetrates through the deslagging pipe array and permeates through the top surface of the deslagging pipe array, when the water flow presses to the top of the deslagging pipe, the flow is limited and guided by the guide rod and the pier-shaped sleeve, so that heavy slag can be rapidly precipitated into the filter tube, and finally, the fine heavy slag is discharged outside through the drain valve; after the water flow permeated by the deslagging pipe array is subjected to secondary flocculation or sedimentation through the deslagging tank, filtering water enters a three-stage filtering deslagging device; remove the sediment of little end middlings sediment of sediment jar and enter into middle buffering fill, when needs are discharged little end middlings sediment outward, close first bottom valve, open the second bottom valve to arrange it outward, then, first bottom valve is opened and the second bottom valve is closed, enters into again and holds the stream and deposit the state.

The working process of the three-stage filtering slag remover is as follows: when the filtered water of the two-stage filtering slag remover is discharged, the water pressure is regulated through the second pressure regulating valve component, so that the water pressure is in a stable state, when the water pressure is lower than a certain threshold value, the second pressure regulating valve component is directly turned off, the filtered water after pressure regulation enters the floating bin, meanwhile, the bottom of the floating bin is aerated through the pneumatic pipe and the air supply system, so that the floating bin is in a balanced state, scum is stopped in the floating bin, the filtered water enters the water filtering bin through the filter screen body, and when the filtered water is pneumatic, the pneumatic pipe is proportionally supplied with air through the chlorine air supply pipeline and the pure air supply pipeline, so that air floatation and disinfection are completed, and a scum discharge pipe valve on the floating bin removes scum; and finally, delivering the filtered water to a tail end water storage tank for storage.

In yet another embodiment, the terminal water storage tank is directly applied with its drainage through a cartridge filter; or the nano-filtration system or the ultrafiltration system is used after secondary treatment.

The above-described embodiments are merely preferred embodiments of the present invention, and all equivalent changes or modifications of the structures, features and principles described in the claims of the present invention are included in the scope of the present invention.

Claims (10)

1. The utility model provides a sewage filters dross removal mechanism which characterized in that: comprises a primary filtering slag remover for precipitation, bottom sealing, outward discharge and slag scraping; and a second-stage filter residue remover for receiving the first-stage filter residue remover, adjusting the pressure of the filtered water after the first-stage filtration is finished, and sending the sewage into the array type pipe column after the pressure adjustment is finished so as to perform infiltration residue removal; and a third-stage filter slag remover for receiving the output filtered water of the second-stage filter slag remover, pneumatically removing scum and injecting chlorine for disinfection; and a tail end water storage tank for receiving the filtered water of the three-stage filtering slag remover.

2. The sewage filtering and deslagging device of claim 1, wherein: the primary filtering slag remover comprises a front filtering tank, wherein a water inlet flange is arranged at the upper part of one side of the front filtering tank, and a water discharge flange is arranged at the lower part of the other side of the front filtering tank; an anti-impact plate is arranged at the water inlet flange on the inner side of the front filter tank; an extension pipe is fixed at the bottom of one side of the front filter tank, which is close to the water inlet flange; a slag settling tank is connected in series in the extension pipe; the extension pipe is respectively provided with a valve body at the top and the bottom of the slag settling tank; a partition plate is welded on one side of the front filter tank, which is far away from the extension pipe; a water permeable window is arranged at the upper part of the partition plate; a slide rail is arranged between the two inner walls of the front filtering tank and the partition plate; a scraper which is pressed with the bottom of the front filter tank is arranged on the slide rail in a sliding manner; the scraper is connected to a traction speed reducer through a reciprocating type traction rope; a hollow shutter seat plate is fixed above the slide rail; a row of louver bodies are arranged between the two louver seat plates through bearings; fluted discs are arranged at two ends of the louver body; each row of the fluted discs are installed through chain belt transmission; a belt disc is arranged outside the shutter base plate; the belt disc is fixed on the transmission shaft, and the transmission shaft penetrates through the bearing and is fixed with the belt disc; the reel is connected to a transition disc at the top of the front filtering tank through a transmission belt; the transition disc is connected to an opening and closing motor outside the front filter tank through a transmission belt; a row of partition plates are arranged above the louver bodies in the front filtering tank; the partition plates are arranged from low to high;

the secondary filtering slag remover comprises a middle buffer tank connected with a drainage flange of the front filtering tank; the bottom of the middle buffer tank is connected to a first pressure regulating valve component through a bottom valve; the first pressure regulating valve assembly is connected to a filter pipe; the filter tube penetrates through the lower part of the slag removing tank in a sealing way; the other end of the filter pipe is connected to the transition tank; a blow-down valve is arranged at the bottom of the transition tank; a plurality of threaded holes are formed in the top surface of the filter tube at intervals; a slag removal pipe is screwed on each threaded hole; the bottom of the slag removing pipe is a reducing port; a filter screen plate pressed with the top surface of the deslagging pipe is fixed on the inner side of the deslagging tank; an inner pipe seat is fixed above the filter screen plate of the deslagging tank; a plurality of flow guide rods are fixed at the bottom of the inner tube seat; the guide rod sequentially penetrates through the filter screen plate and the slag removal pipe and extends to the inner side of the filter pipe; the guide rod is provided with a pier-shaped sleeve which is in sliding fit with the inner wall of the slag removing pipe in a sliding way; the bottom of the deslagging tank is hopper-shaped; and is connected to the middle buffer hopper through the first bottom valve; the middle buffer bucket is connected to the outer discharge pipe through a second bottom valve;

the third-stage filtering slag remover comprises a second pressure regulating valve component connected with the lower part of the slag removing tank through a flange; the second pressure regulating valve assembly is connected to the closed floating bin; the bottom of the floating bin is spirally connected with a plurality of pneumatic pipes; the two ends of the pneumatic pipe are of mesh structures; and the inner side of the pneumatic tube is provided with a filter screen body; the bottom of the pneumatic tube is provided with an inflation tube; the inflation pipe is connected to an air supply system; the gas supply system comprises a pure air supply pipeline and a chlorine gas supply pipeline; the pure air supply pipeline and the chlorine gas supply pipeline are respectively connected to the proportional valve; the middle end of the proportional valve is connected to an inflation tube; the floating bin and the pneumatic pipe are both arranged in the water filtering bin; a scum discharge pipe valve is arranged at the end part of the floating bin; the bottom of the water filtering bin is connected to the tail end water storage tank through a pipeline.

3. The sewage filtering and deslagging device of claim 2, wherein: the pier-shaped sleeve is a filter screen cover or a pier-shaped cylinder.

4. The sewage filtering and deslagging device of claim 2, wherein: the filter tube is of a coil tube or straight tube structure.

5. The sewage filtering and deslagging device of claim 2, wherein: the first pressure regulating valve component and the second pressure regulating valve component comprise an opening valve and a pressure transmitter which are connected in series; the opening valve and the pressure transmitter are linked through a controller.

6. The sewage filtering and deslagging device of claim 1, wherein: the tail end water storage tank is connected to the cartridge filter; the security filter is connected to a nanofiltration system or an ultrafiltration system.

7. The sewage filtering and deslagging device of claim 2, wherein: the working process of the primary filtering slag remover is as follows:

the sewage is continuously or discontinuously fed into the front filter tank through the water inlet flange, filtered water is discharged through the water discharge flange after being treated in the front filter tank, and when the sewage enters the front filter tank, the sewage is slowly flowed through the impact prevention plate, so that the internal oscillation of the front filter tank caused by external water pressure is avoided; after sewage is subjected to slow flow and isolation sequentially through the partition plate, the settled water flow enters one side of a drainage flange of the front filter tank through the partition plate; the sewage precipitation layer sequentially penetrates through the partition plate and the louver body to slowly descend, the louver body is perpendicular to the front filter tank when penetrating through water for precipitation, the precipitation layer is used for scraping slag periodically to remove old slag so that a water body is kept fresh, the transition disc is driven to rotate through the opening and closing motor and the transmission belt when scraping the slag, the transition disc drives the belt disc and the transmission shaft to rotate, so that the chain belt is driven to rotate through the fluted disc, the louver body rotates 90 degrees in a reverse direction, and the louver body rotates 270 degrees in a forward direction after the slag scraping is completed; re-receiving the sewage and the aged slag and slowly descending; when scraping the sediment, carry out the seal coat through the louver body to sewage, sewage and sediment below the louver body strike off through the scraper blade, and when the sediment was scraped to the scraper blade, scrape the sediment through the reciprocating type haulage rope realization of traction speed reducer drive, be about to the scraper blade and reset, sewage and sediment are scraped into the extension pipe through the scraper blade to fall into the sediment pond, realize the upper end through switching the valve body at last and seal, and sewage and sediment lower extreme blowdown.

8. The sewage filtering and deslagging device of claim 2, wherein: the working process of the secondary filtering slag remover is as follows:

after the drainage flange of the first-stage filtering slag remover discharges the filtered water, the filtered water enters the middle buffer tank, after the buffer flow is stored through the middle buffer tank, the water is sent to the first pressure regulating valve component by the bottom valve, the first pressure regulating valve component enables the water pressure to be in a stable state by regulating the water pressure, when the water pressure is lower than a certain threshold value, the first pressure regulating valve component is directly turned off, the filtered water which completes pressure regulation enters the filter pipe and enters the transition tank for transition and steady flow, meanwhile, the filtered water enters the deslagging pipe array through the filter pipe to carry out deslagging, the bottom of the deslagging pipe is provided with a reducing hole, one-step deslagging can be realized, the filtered water which completes pressure stabilization penetrates through the deslagging pipe array and permeates through the top surface of the deslagging pipe array, when the water flow presses to the top of the deslagging pipe, the flow is limited and guided by the guide rod and the pier-shaped sleeve, so that heavy slag can be rapidly precipitated into the filter tube, and finally, the fine heavy slag is discharged outside through the drain valve; after the water flow permeated by the deslagging pipe array is subjected to secondary flocculation or sedimentation through the deslagging tank, filtering water enters a three-stage filtering deslagging device; remove the sediment of little end middlings sediment of sediment jar and enter into middle buffering fill, when needs are discharged little end middlings sediment outward, close first bottom valve, open the second bottom valve to arrange it outward, then, first bottom valve is opened and the second bottom valve is closed, enters into again and holds the stream and deposit the state.

9. The sewage filtering and deslagging device of claim 2, wherein: the working process of the three-stage filtering slag remover is as follows:

when the filtered water of the two-stage filtering slag remover is discharged, the water pressure is regulated through the second pressure regulating valve component, so that the water pressure is in a stable state, when the water pressure is lower than a certain threshold value, the second pressure regulating valve component is directly turned off, the filtered water after pressure regulation enters the floating bin, meanwhile, the bottom of the floating bin is aerated through the pneumatic pipe and the air supply system, so that the floating bin is in a balanced state, scum is stopped in the floating bin, the filtered water enters the water filtering bin through the filter screen body, and when the filtered water is pneumatic, the pneumatic pipe is proportionally supplied with air through the chlorine air supply pipeline and the pure air supply pipeline, so that air floatation and disinfection are completed, and a scum discharge pipe valve on the floating bin removes scum; and finally, delivering the filtered water to a tail end water storage tank for storage.

10. The sewage filtering and deslagging device of claim 1, wherein: the drainage of the tail end water storage tank is directly applied through a cartridge filter; or the nano-filtration system or the ultrafiltration system is used after secondary treatment.

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