Deep and efficient sludge dewatering device of water supply system

Abstract

The utility model discloses a water supply system sludge deep efficient dewatering device which comprises a primary dewatering box and a secondary dewatering box, a net barrel is vertically arranged in the primary dewatering box, an air cylinder is arranged at the top of the primary dewatering box, a piston rod of the air cylinder extends into the net barrel and then is provided with a pressing block, and a gate valve is arranged on a discharging pipe. Two filter cloth belts are symmetrically arranged in the second-stage dewatering box up and down, a driving roller, a guide roller and a plurality of extrusion rollers are mounted on each filter cloth belt, the extrusion rollers mounted on the two filter cloth belts are arranged in a one-to-one correspondence manner, and a gap between the two corresponding extrusion rollers is gradually reduced in the sludge conveying direction; an arc-shaped material guide plate is arranged in the second-stage dewatering box below the discharging pipe, the lower end of the arc-shaped material guide plate extends into a gap between the two filter cloth belts, a dryer is arranged below the discharging ends of the filter cloth belts, and a water outlet is formed in the bottom of the second-stage dewatering box. In conclusion, the utility model has the advantages of high working efficiency, good dehydration effect and large handling capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge dehydration treatment, in particular to a deep and efficient sludge dehydration device for a water supply system. Background Art

[0002] The water supply system refers to a complex of reservoirs, pumps, pipelines and other projects that supply water to different water-using departments according to certain quality requirements. The water supply system will produce a large amount of sludge with complex components during operation. The sludge is a collection of bacterial flocs formed by various microorganisms and organic and inorganic substances adsorbed by them, containing a large amount of water, organic groups, heavy metals, salts, pathogenic microorganisms and parasite eggs. If a large amount of untreated sludge is randomly piled up and discharged, it will cause new pollution to the environment. The sludge treatment of the water supply system mainly includes concentration, dehydration, drying and incineration. Dehydration is the key step in sludge treatment.

[0003] There are many types of sludge dewatering devices used in my country. When used, flocculants are added to sewage to form flocculent sludge, and then the sludge dewatering device is used for solid-liquid separation. However, in general, most of them have problems such as difficulty in dewatering, poor dewatering effect, and low work efficiency. The water content in the dewatered sludge is still high; secondly, there is also the problem of small sludge processing capacity, which cannot meet the current treatment needs of increasing sludge production. Therefore, it is an objective need to develop a deep and efficient sludge dewatering device for water supply systems with high work efficiency, good dewatering effect, and large processing capacity. Utility Model Content

[0004] The utility model aims to provide a deep and efficient sludge dehydration device for a water supply system with high working efficiency, good dehydration effect and large processing capacity.

[0005] The utility model is achieved in that it comprises a primary dewatering box and a secondary dewatering box located below the primary dewatering box, a mesh cylinder is vertically arranged in the primary dewatering box, a cylinder is arranged on the top of the primary dewatering box, a pressure block is arranged after the piston rod of the cylinder extends into the mesh cylinder, a feeding port extending into the mesh cylinder is arranged on the upper part of the primary dewatering box, a downpipe and a downpipe connected with the top of the secondary dewatering box are arranged at the bottom of the primary dewatering box, a gate valve is arranged on the downpipe, two filter cloth belts are symmetrically arranged in the secondary dewatering box, a driving roller, a guide roller and a plurality of squeezing rollers are installed on each filter cloth belt, the squeezing rollers installed on the two filter cloth belts are arranged one by one, and the gap between the corresponding two squeezing rollers gradually decreases along the conveying direction of the sludge, an arc-shaped guide plate is arranged in the secondary dewatering box below the downpipe, the lower end of the arc-shaped guide plate extends into the gap between the two filter cloth belts, a dryer is arranged below the discharge end of the filter cloth belt, and a drain is arranged at the bottom of the secondary dewatering box.

[0006] Furthermore, the dryer includes a hopper and a slag discharge pipe located at the bottom of the hopper, and a heating element is arranged on the outer wall of the hopper.

[0007] Furthermore, a stirrer is arranged in the hopper.

[0008] Furthermore, the feed pipe is a rectangular tube, and the width direction of the rectangular tube is perpendicular to the sludge conveying direction of the filter cloth belt.

[0009] Furthermore, a scraper plate is provided in the secondary dewatering box at the discharge end of each filter cloth belt.

[0010] Furthermore, an exhaust pipe is arranged on the top of the first-stage dehydration box, and an exhaust fan and a gas purifier are arranged on the exhaust pipe in sequence.

[0011] Furthermore, a cone is arranged between the lower end of the mesh cylinder and the upper end of the feed tube, a drainage hole is arranged on the cone, and the side wall of the pressing block is consistent with the inner wall of the cone.

[0012] The utility model is in operation, and the concentrated sludge is fed into the mesh drum through the feeding port. When the sludge height in the mesh drum reaches a preset height, the feeding is stopped, and the cylinder is started. The cylinder drives the pressing block to move downward to continuously squeeze the sludge, and the moisture in the sludge continuously passes through the mesh holes on the mesh drum into the primary dewatering box, and then flows to the secondary dewatering box along the downpipe. The sludge that meets the primary dewatering requirement enters the secondary dewatering box along the downpipe under the squeezing action of the pressing block, and enters the gap between the two filter cloth belts under the guidance of the arc-shaped guide plate. The filter cloth belt runs under the driving action of the driving roller. The sludge after the primary dewatering moves forward under the driving action of the filter cloth belt, passes through the squeezing rollers in turn, and is squeezed and dehydrated by the squeezing action of the corresponding two squeezing rollers again. The squeezed moisture falls into the secondary dewatering box and is collected and discharged from the drain port. The sludge after the two-stage squeezing falls into the dryer from the discharge end of the filter cloth belt, and is further heated, dehydrated and dried by the dryer, so as to finally meet the dehydration requirement of the sludge. It can be seen that in the above dehydration process of the sludge in the water supply system, the sludge will successively undergo primary dehydration, secondary dehydration and the final drying operation. The combination of cylinder extrusion, extrusion roller extrusion and heating drying has a good dehydration efficiency and dehydration effect on the sludge, which can effectively reduce the water content of the dehydrated sludge and meet the dehydration demand of the sludge; secondly, in the whole dehydration process, each process can continuously dehydrate the sludge, with high work efficiency, strong processing capacity, and large processing capacity, which can meet the current sludge processing needs of most enterprises. In summary, the utility model has the advantages of high work efficiency, good dehydration effect and large processing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] In the figure: 1-primary dehydration box, 2-secondary dehydration box, 3-net cylinder, 4-cylinder, 5-briquetting, 6-feeding port, 7-down pipe, 8-down pipe, 9-filter cloth belt, 10-driving roller, 11-guide roller, 12-squeezing roller, 13-arc guide plate, 14-dryer, 15-drainage port, 16-hopper, 17-slag discharge pipe, 18-heating element, 19-agitator, 20-slag scraper, 21-exhaust fan, 22-gas purifier, 23-cone. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the present invention belong to the protection scope of the present invention.

[0016] like Figure 1 As shown, the utility model comprises a primary dewatering box 1 and a secondary dewatering box 2 located below the primary dewatering box 1, a mesh cylinder 3 is vertically arranged in the primary dewatering box 1, the mesh cylinder 3 is an existing structure, mesh holes are arranged on the mesh cylinder 3, and water in the sludge can be seeped out, a cylinder 4 is arranged on the top of the primary dewatering box 1, a pressure block 5 is arranged after the piston rod of the cylinder 4 is extended into the mesh cylinder 3, a feeding port 6 extending into the mesh cylinder 3 is arranged on the upper part of the primary dewatering box 1, in order to facilitate the feeding of sludge, the feeding port 6 can be set to an inclined state to prevent the sludge from flowing back, a water down pipe 7 and a feeding pipe 8 connected with the top of the secondary dewatering box 2 are arranged at the bottom of the primary dewatering box 1, a gate valve is arranged on the feeding pipe 8, the gate valve is an existing structure, and the feeding pipe 8 can be opened and closed, and in actual use, a plug plate structure can be arranged, and the opening and closing of the feeding pipe 8 can be realized by pulling and inserting the plug plate, and two symmetrically arranged upper and lower parts are arranged in the secondary dewatering box 2. A filter cloth belt 9 is provided, and the filter cloth belt 9 is an existing filtering structure, which can facilitate the discharge of moisture in the sludge. A driving roller 10, a guide roller 11 and a plurality of squeezing rollers 12 are installed on each filter cloth belt 9. The squeezing rollers 12 installed on the two filter cloth belts 9 are arranged one by one, and the gap between the corresponding two squeezing rollers 12 gradually decreases along the conveying direction of the sludge. The gap between the squeezing rollers 12 gradually decreases, and the moisture in the sludge can be gradually discharged, which has a good dehydration effect. An arc-shaped guide plate 13 is provided in the secondary dehydration box 2 below the feeding pipe 8, and the lower end of the arc-shaped guide plate 13 extends into the gap between the two filter cloth belts 9. A dryer 14 is provided below the discharge end of the filter cloth belt 9. The dryer 14 is an existing structure and can be set to a structure with an open upper end. When the sludge falls into the dryer 14, the dryer 14 can dry it. A drain port 15 is provided at the bottom of the secondary dehydration box 2.

[0017] When the utility model is in operation, the concentrated sludge is fed into the mesh cylinder 3 along the feeding port 6. When the sludge height in the mesh cylinder 3 reaches a preset height, the feeding is stopped and the cylinder 4 is started. The cylinder 4 drives the pressing block 5 to move downward to continuously squeeze the sludge. The water in the sludge continuously passes through the mesh holes on the mesh cylinder 3 and enters the primary dehydration box 1, and then flows along the downpipe 7 to the secondary dehydration box 2. The sludge that meets the primary dehydration requirements enters the secondary dehydration box 2 along the downpipe 8 under the squeezing action of the pressing block 5, and enters the two filter cloth belts under the guidance of the arc-shaped guide plate 13. 9, the filter cloth belt 9 is driven by the driving roller 10 to run, and the sludge after the primary dehydration moves forward under the drive of the filter cloth belt 9, passes through the squeezing rollers 12 in turn, and is squeezed and dehydrated again under the squeezing action of the two corresponding squeezing rollers 12, and the squeezed water falls into the secondary dehydration box 2 and is collected and discharged from the drain port 15, and the sludge after two-stage squeezing falls from the discharge end of the filter cloth belt 9 into the dryer 14, and is further heated, dehydrated and dried by the dryer 14, and finally the dehydration requirement of the sludge is met. It can be seen that in the above-mentioned dehydration process of the sludge in the water supply system, the sludge will undergo primary dehydration, secondary dehydration and final drying operations in succession. The combination of the extrusion of the cylinder 4, the extrusion of the extrusion roller 12 and the heating and drying has a good dehydration efficiency and dehydration effect on the sludge, which can effectively reduce the water content of the dehydrated sludge and meet the dehydration demand of the sludge; secondly, in the whole dehydration process, each process can continuously dehydrate the sludge, has high work efficiency, strong processing capacity, and large processing capacity, which can meet the current sludge processing needs of most enterprises.

[0018] The dryer 14 includes a hopper 16 and a slag discharge pipe 17 located at the bottom of the hopper 16. A heating element 18 is provided on the outer wall of the hopper 16. The heating element 18 is a prior art and can be a structure such as an electric heating wire. The heating element 18 is used to heat and dry the sludge in the hopper 16 to further reduce the moisture in the sludge and improve the dehydration effect.

[0019] An agitator 19 is provided in the hopper 16. The agitator 19 is a prior art. It is installed in the hopper 16 and has two functions. One is that it can disperse the sludge, greatly increase the heating area of ​​the sludge, and thus improve the drying effect of the sludge. The other is that it makes the sludge looser so that it can be smoothly discharged from the slag discharge pipe 17, reducing the chance of blockage.

[0020] The feed pipe 8 is a rectangular tube. The length direction of the cross section of the rectangular tube is perpendicular to the sludge conveying direction of the filter cloth belt 9. The sludge is conveyed from the primary dewatering tank 1 to the secondary dewatering tank 2 through the feed pipe 8, and the sludge is conveyed to the gap between the two filter cloth belts 9. However, there is often a problem of uneven sludge distribution, which reduces the dewatering effect of the sludge. Therefore, the feed pipe 8 is set to be a rectangular tube. In this way, when the sludge is discharged from the feed pipe 8, the sludge is in a flat strip shape and can be evenly sandwiched between the two filter cloth belts 9, which is convenient for extrusion dehydration by the extrusion roller 12, thereby improving the dewatering effect of the sludge.

[0021] A scraper plate 20 is provided in the secondary dewatering box 2 at the discharge end of each filter cloth belt 9. When the sludge is dewatered in the secondary dewatering box 2, the sludge is wrapped in the two filter cloth belts 9. After the dehydrated sludge is discharged, there will always be a certain amount of residue adhering to the filter cloth belt 9. These sludges will affect the subsequent dewatering effect of the filter cloth belt 9 on the sludge. Therefore, a scraper plate 20 is provided to scrape off the sludge to ensure the water filtering effect of the filter cloth belt 9.

[0022] An exhaust pipe is provided at the top of the first-stage dehydration box 1, and an exhaust fan 21 and a gas purifier 22 are provided on the exhaust pipe in sequence. The gas purifier 22 is a prior art and can purify the gas. During the dehydration and drying process of the sludge, a large amount of gas with peculiar smell will be emitted, which will undoubtedly pollute the surrounding environment. Therefore, these gases are extracted by the exhaust fan 21 and processed by the gas purifier 22 to achieve the purpose of purification.

[0023] A cone 23 is provided between the lower end of the net cylinder 3 and the upper end of the feed pipe 8, and a drainage hole is provided on the cone 23. The side wall of the pressing block 5 is matched with the inner wall of the cone 23. In actual operation of the utility model, when the sludge in the net cylinder 3 is squeezed out, the gate valve on the feed pipe 8 is opened, and then the piston rod of the cylinder 4 continues to drive the pressing block 5 to move downward. The sludge continues to move downward under the squeezing action of the pressing block 5, and then is squeezed out from the feed pipe 8. Since the diameter of the net cylinder 3 is much larger than the diameter of the feed pipe 8, the sludge will accumulate at the bottom of the primary dewatering box 1 between the feed pipe 8 and the net cylinder 3, and then affect the normal operation of the device. In order to avoid this situation, the cone 23 is provided, and the pressing block 5 that is matched with the inner wall of the cone 23 is provided to ensure that the pressing block 5 can squeeze out all the sludge and prevent sludge accumulation.

Claims

1. A high-efficiency deep dehydration device for sludge in a water supply system, comprising a primary dehydration tank (1) and a secondary dehydration tank (2) located below the primary dehydration tank (1), characterized in that A net cylinder (3) is vertically arranged in the first-stage dewatering box (1), a cylinder (4) is arranged on the top of the first-stage dewatering box (1), a pressure block (5) is arranged after the piston rod of the cylinder (4) extends into the net cylinder (3), a feeding port (6) extending into the net cylinder (3) is arranged on the top of the first-stage dewatering box (1), a downpipe (7) and a downpipe (8) connected to the top of the second-stage dewatering box (2) are arranged at the bottom of the first-stage dewatering box (1), a gate valve is arranged on the downpipe (8), two filter cloth belts (9) are symmetrically arranged in the second-stage dewatering box (2), and each filter cloth belt (9) is provided with a A driving roller (10), a guide roller (11) and a plurality of squeezing rollers (12) are provided. The squeezing rollers (12) installed on the two filter cloth belts (9) are arranged one by one, and the gap between the two corresponding squeezing rollers (12) gradually decreases along the conveying direction of the sludge. An arc-shaped guide plate (13) is provided in the secondary dewatering box (2) below the discharge pipe (8). The lower end of the arc-shaped guide plate (13) extends into the gap between the two filter cloth belts (9). A drying machine (14) is provided below the discharge end of the filter cloth belt (9). A drainage outlet (15) is provided at the bottom of the secondary dewatering box (2).

2. A water supply system sludge deep and efficient dehydration device according to claim 1, characterized in that The dryer (14) comprises a hopper (16) and a slag discharge pipe (17) located at the bottom of the hopper (16), and a heating element (18) is arranged on the outer wall of the hopper (16).

3. A water supply system sludge deep and efficient dehydration device according to claim 2, characterized in that A stirrer (19) is provided in the hopper (16).

4. A water supply system sludge deep and efficient dehydration device according to claim 1, characterized in that The feed pipe (8) is a rectangular tube, and the length direction of the cross section of the rectangular tube is perpendicular to the sludge conveying direction of the filter cloth belt (9).

5. The device for deep and efficient dehydration of sludge in a water supply system according to claim 1 is characterized in that A scraper plate (20) is provided in the secondary dewatering box (2) at the discharge end of each filter cloth belt (9).

6. A water supply system sludge deep and efficient dehydration device according to claim 1, characterized in that An exhaust pipe is arranged on the top of the primary dehydration box (1), and an exhaust fan (21) and a gas purifier (22) are arranged on the exhaust pipe in sequence.

7. A deep and efficient dehydration device for sludge in a water supply system according to claim 1, characterized in that A cone (23) is provided between the lower end of the net cylinder (3) and the upper end of the feed pipe (8), and a drainage hole is provided on the cone (23). The side wall of the pressing block (5) is consistent with the inner wall of the cone (23).

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