CN110550840B - Sludge wall breaking device and wall breaking method for deep squeezing of sludge - Google Patents
Sludge wall breaking device and wall breaking method for deep squeezing of sludge Download PDFInfo
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- CN110550840B CN110550840B CN201910917521.6A CN201910917521A CN110550840B CN 110550840 B CN110550840 B CN 110550840B CN 201910917521 A CN201910917521 A CN 201910917521A CN 110550840 B CN110550840 B CN 110550840B
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- 239000010802 sludge Substances 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 230000018044 dehydration Effects 0.000 claims abstract description 14
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims description 73
- 239000000463 material Substances 0.000 claims description 37
- 238000004140 cleaning Methods 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000005189 flocculation Methods 0.000 claims description 5
- 230000016615 flocculation Effects 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000000654 additive Substances 0.000 abstract description 2
- 230000000996 additive effect Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
A sludge wall breaking device and a wall breaking method for deep squeezing of sludge belong to a municipal sludge treatment device and a municipal sludge treatment method. The mud broken wall device comprises two parts, include: a hydraulic plunger pump and a grid wall breaking device; the hydraulic plunger pump is positioned in front of the grid wall breaking device and is connected through a wall breaking pipeline; the hydraulic plunger pump moves reciprocally to pressurize and release to pressurize and break the wall of the mud, the broken wall device of the grid breaks the wall of the mud grid, implement the double broken wall to the mud; the sludge subjected to double wall breaking is conveyed to general squeezing dehydration equipment through a squeezing pipeline connected with a grid wall breaking device, and the sludge is squeezed in the general squeezing dehydration equipment. The advantages are that: the water content of the sludge after deep squeezing of the broken wall of the sludge at normal temperature is low and reaches 55% -58%, so that the occupied space and the combustion efficiency of the sludge are greatly reduced. No additive is needed, and the method is economical and practical and has low investment and operation cost. The device has simple structure, economy, practicability, easy installation and debugging, high efficiency, energy conservation and long service life.
Description
Technical Field
The invention relates to a device and a method for treating municipal sludge, in particular to a device and a method for breaking wall of sludge by deep squeezing of sludge.
Background
Most of the sludge is a flocculent organic matter with hydrophilicity, is of a composite colloid net structure, has high hydration degree and is difficult to squeeze. At present, general sludge squeezing and dewatering equipment is a plate frame squeezer, a box type squeezer, a diaphragm squeezer and the like, and because repeated wall breaking treatment is not carried out before the sludge is squeezed, the squeezing and dewatering effects of the existing sludge squeezing equipment are not ideal, and the water content of the squeezed sludge is generally about 80%.
Disclosure of Invention
The invention aims to provide a sludge wall breaking device and a wall breaking method for deep-pressing sludge, which solve the problem of low sludge pressing dehydration rate in the prior art.
The purpose of the invention is realized in the following way: the invention comprises a wall breaking device and a wall breaking method for sludge.
The mud broken wall device comprises two parts, include: a hydraulic plunger pump and a grid wall breaking device; the hydraulic plunger pump is positioned in front of the grid wall breaking device and is connected through a wall breaking pipeline; the hydraulic plunger pump moves reciprocally to pressurize and release to pressurize and break the wall of the mud, the broken wall device of the grid breaks the wall of the mud grid, implement the double broken wall to the mud; the sludge subjected to double wall breaking is conveyed to general squeezing dehydration equipment through a squeezing pipeline connected with a grid wall breaking device, and the sludge is squeezed in the general squeezing dehydration equipment.
The hydraulic plunger pump includes: the device comprises a main pressure oil cylinder, a piston rod, a material cylinder, a feed hopper, a base, a cleaning water tank, a material cylinder piston, a hopper body and a reversing device; the cleaning water tank and the hopper body are arranged on the base; a main pressure oil cylinder is arranged on one side of the cleaning water tank; a material cylinder is arranged between the other side of the cleaning water tank and the hopper body; one end of the piston rod, which passes through the cleaning water tank, is positioned in the main pressure oil cylinder, and the other end of the piston rod is positioned in the material cylinder; the two ends of the piston rod are respectively provided with an oil cylinder piston and a material cylinder piston, the oil cylinder piston is positioned in the main pressure oil cylinder, and the material cylinder piston is positioned in the material cylinder; the upper end of one side of the hopper body is provided with a feed hopper.
The reversing device comprises: the device comprises a feeding oil cylinder, a feeding valve plug, a discharging oil cylinder, a feeding valve port, a discharging valve port and a discharging chamber; the feeding oil cylinder is arranged on the side wall of the hopper body and is positioned on the hopper body above the material cylinder; a discharging chamber is connected to the other side wall of the hopper body, and the discharging chamber is positioned on the hopper body below the feeding hopper; a feeding valve port and a discharging valve port are arranged on the side wall of the hopper body at one side of the feeding hopper, the feeding valve port is positioned at the position of the feeding hopper, and the discharging valve port is positioned at the position of the discharging chamber; the end part of the feeding oil cylinder is connected with a feeding valve plug which is positioned in the hopper body and corresponds to the feeding valve port; the side wall of the discharging chamber is connected with a discharging oil cylinder and a broken wall pipeline, the end part of the discharging oil cylinder is connected with a discharging valve plug, and the discharging valve plug is positioned in the discharging chamber and corresponds to the discharging valve port.
Preferably, the hydraulic plunger pump is a double-cylinder cone valve plunger pump; the pump can also be a single-cylinder cone valve plunger pump; or an S-pendulum plunger pump; or a single cylinder plunger pump.
The grid broken wall device include: the shell, the broken-wall grating and the grating clamping groove; the shell is internally provided with a grid clamping groove which is arranged into 2-3 channels, and a wall breaking grid is placed in the grid clamping groove; the side wall of the shell is provided with a wall breaking input port and a wall breaking output port; the wall breaking input port is connected with the output port of the plunger pump through a conveying pipeline; the wall breaking output port is connected with the input port of the general squeezing dehydration equipment; the wall-broken grids are provided with a group of 2-3 blocks, each wall-broken grid is provided with holes, the sizes of the holes on the wall-broken grids in the group are different, and the wall-broken grids placed in the grid clamping grooves are sequentially arranged from large to small according to the sizes of the holes; the grid broken wall device is installed between the hydraulic plunger pump and the general sludge squeezing device through the squeezing pipeline, a group of built-in broken wall grids of the grid broken wall device can be replaced at any time, the later broken wall grid is smaller than the holes of the former broken wall grid, and the sludge is broken wall through the multistage grid, so that the secondary broken wall of the sludge is realized.
Sludge, which refers to municipal sludge, has a certain heat value after being squeezed and dehydrated, and can be burnt.
The method for breaking the wall of the sludge comprises the following specific steps:
when the hydraulic plunger pump works, the feeding oil cylinder opens the feeding valve plug to open the feeding valve port; the discharging cylinder closes the discharging valve plug to seal the discharging valve port, the cylinder piston drives the cylinder piston to retreat through the piston rod, and the sludge enters the feeding cylinder from the feeding hopper, the feeding valve port and the hopper body under the action of negative pressure; after the material cylinder is full of sludge, the material discharging cylinder opens the material discharging valve plug, and opens the material discharging valve port; the feeding cylinder closes the feeding valve plug, the feeding valve port is closed, the cylinder piston drives the feeding cylinder piston to advance through the piston rod, and sludge is pushed to the broken wall pipeline through the discharging valve port and the discharging chamber, so that the sludge is circulated and reciprocated;
the hydrophilic structure of the sludge is destroyed by repeated extrusion of high pressure of a hydraulic plunger pump, partial bonding bonds are broken, most of interstitial water and partial capillary water of sludge particles in the sludge flocculation group can be released to form free water, and the first pressurizing wall breaking of the sludge is realized;
step (2), the sludge after the first wall breaking enters a grid wall breaking device through a wall breaking pipeline;
step (3), the sludge subjected to wall breaking treatment by a hydraulic plunger pump enters a grating wall breaking device, 2-3 grating walls of the grating wall breaking device, the holes of the later grating wall breaking device are smaller than those of the former grating wall breaking device, and a second grating wall breaking is carried out on the sludge; extruding, cutting and mixing the sludge again, and destroying the hydrophilic structure of the sludge again to form loose slurry which is convenient for quickly releasing the bound water by squeezing;
step (4), conveying the sludge processed into loose slurry to general sludge dewatering equipment through a squeezing pipeline; the sludge of loose slurry is squeezed by common sludge dewatering equipment.
The method has the beneficial effects that by adopting the scheme, the deep-squeezing sludge wall breaking device is adopted, the sludge is input into the hydraulic plunger pump conveying and feeding cylinder, the hydraulic plunger pump conveying and feeding cylinder extrudes the sludge for multiple times at the action frequency of (4-6) times/min, the large pressure is generated when the sludge is extruded, the pressure is instantaneously disappeared when the hydraulic plunger pump is in reversing clearance, the hydrophilic structure of the sludge is destroyed under the action of alternating of a high pressure state and a high pressure intermittent state, part of bonding bonds are broken, most of interstitial water in a sludge flocculation group and capillary water of part of sludge particles are released to form free water, the hydrophilic property of sludge molecules is effectively destroyed, and the first wall breaking treatment is carried out on the sludge; the mud that carries out broken wall processing through hydraulic plunger pump and carry out gets into grid broken wall device once more, because the grid of grid broken wall device is porous structure, and the later stage grid hole is less than preceding stage grid hole, and mud is through the re-extrusion of grid hole, cutting, mixing, and the hydrophilic structure of mud is destroyed once more, forms into a loose thick liquids that is convenient for release the combination water through squeezing, carries out the broken wall processing of secondary to mud. The free water in the sludge is released by the squeezing of the squeezing equipment. The general squeezing equipment can deeply squeeze and deeply dehydrate the wall-broken sludge, the water content of the squeezed sludge is about 55-58%, and the dehydration effect is very good.
When the hydraulic plunger pump works, a valve is not arranged on a wall breaking pipeline between the hydraulic plunger pump and the grid wall breaking device, when an oil cylinder piston connected with a main pressure oil cylinder does work in pushing, the pressure in the wall breaking pipeline is increased, high pressure is transmitted to the grid wall breaking device, when the main pressure oil cylinder retreats, the pressure in the wall breaking pipeline is instantaneously lost when a feeding oil cylinder acts, the structure of sludge is destroyed through the actions of repeated pressurization and instantaneous pressure drop of reversing of the oil cylinder piston, the sludge becomes loose, part of bonding bonds are broken, and most of interstitial water and capillary water of part of sludge particles in a sludge flocculation group are released to form free water; the combination energy between the sludge particles and the combination water adsorbed on the surfaces of the sludge particles is also destroyed to a certain extent, the solid-liquid separation of the sludge is realized to a certain extent, and the squeezing effect is further improved.
Solves the problems of higher sludge squeezing difficulty and low dehydration rate in the prior art, and achieves the aim of the invention.
Compared with the existing sludge pressing technology, the technology has the following advantages:
1. the water content of the sludge after deep squeezing of the broken wall of the sludge is low and reaches 55% -58%, the occupied space and the combustion efficiency of the sludge are greatly reduced, and no redundant working procedures are caused.
2. The system is simple, the technology is advanced, no additive is needed, and the method is economical and practical and has low investment and operation cost.
3. The wall breaking and squeezing of the sludge are all at normal temperature, and the environmental pollution is small.
4. The device has simple structure, economy, practicability, easy installation and debugging, high efficiency, energy conservation and long service life.
5. Can effectively improve the sludge dewatering efficiency and improve the labor productivity and the economic benefit.
Drawings
Fig. 1 is a structural diagram of the present invention.
Fig. 2 is a structural view of the hydraulic ram pump of the present invention.
FIG. 3 is a block diagram of the grating wall breaking apparatus of the present invention.
Fig. 4 is a block diagram of the reversing device of the present invention.
In the figure, 1, a hydraulic plunger pump; 2. a main pressure oil cylinder; 3. a feeding oil cylinder; 4. a piston rod; 5. a material cylinder; 6. a feed hopper; 7. a grating wall breaking device; 8. breaking the wall of the grille; 9. a press line; 10. a base; 11. cleaning the water tank; 12. a cylinder piston; 13. a hopper body; 14. a feed valve plug; 15. a discharging valve plug; 16. breaking the wall of the pipeline; 17. a discharging oil cylinder; 18. a feed valve port; 19. a discharge valve port; 20. and a discharging chamber.
Detailed Description
The sludge wall breaking device of the invention consists of two parts, including: a hydraulic plunger pump 1 and a grid wall breaking device 7; the hydraulic plunger pump 1 is positioned in front of the grid wall breaking device 7 and is connected through a wall breaking pipeline 16; the hydraulic plunger pump 1 performs reciprocating motion and pressurization release to pressurize and break the wall of the sludge, the grid wall breaking device 7 breaks the wall of the sludge grid, and double wall breaking is performed on the sludge; the sludge subjected to double wall breaking is conveyed to a general squeezing dehydration device through a squeezing pipeline 9 connected with a grid wall breaking device 7, and the sludge is squeezed in the general squeezing dehydration device.
The hydraulic plunger pump 1 includes: the device comprises a main pressure oil cylinder 2, a piston rod 4, a material cylinder 5, a feed hopper 6, a base 10, a cleaning water tank 11, a material cylinder piston 12, a hopper body 13 and a reversing device; the cleaning water tank 11 and the hopper body 13 are arranged on the base 10; a main pressure oil cylinder 2 is arranged on one side of the cleaning water tank 11; a material cylinder 5 is arranged between the other side of the cleaning water tank 11 and the hopper body 13; one end of the piston rod 4, which passes through the cleaning water tank 11, is positioned in the main pressure oil cylinder 2, and the other end is positioned in the material cylinder 5; the two ends of the piston rod 4 are respectively provided with an oil cylinder piston and a material cylinder piston, the oil cylinder piston is positioned in the main pressure oil cylinder 2, and the material cylinder piston 12 is positioned in the material cylinder 5; a feed hopper 6 is arranged at the upper end of one side of the hopper body 13.
The reversing device comprises: the feeding cylinder 3, the feeding valve plug 14, the discharging valve plug 15, the discharging cylinder 17, the feeding valve port 18, the discharging valve port 19 and the discharging chamber 20; the feeding oil cylinder 3 is arranged on the side wall of the hopper body 13 and is positioned on the hopper body 13 above the material cylinder 5; a discharging chamber 20 is connected to the other side wall of the hopper body 13, and the discharging chamber 20 is positioned on the hopper body 13 below the feeding hopper 6; a feeding valve port 18 and a discharging valve port 19 are arranged on the side wall of the hopper body 13 at one side of the feeding hopper 6, the feeding valve port 18 is positioned at the position of the feeding hopper 6, and the discharging valve port 19 is positioned at the position of the discharging chamber 20; the end part of the feeding oil cylinder 3 is connected with a feeding valve plug 14, and the feeding valve plug 14 is positioned in the hopper body 13 and corresponds to the feeding valve port 18; the side wall of the discharging chamber 20 is connected with a discharging oil cylinder 17 and a broken wall pipeline 16, the end part of the discharging oil cylinder 17 is connected with a discharging valve plug 15, and the discharging valve plug 15 is positioned in the discharging chamber 20 and corresponds to the discharging valve port 19.
The preferable hydraulic plunger pump is a double-cylinder cone valve plunger pump; the pump can also be a single-cylinder cone valve plunger pump; or an S-pendulum plunger pump; or a single cylinder plunger pump.
The grid broken wall device 7 includes: the shell, the broken-wall grating and the grating clamping groove; the shell is internally provided with a grid clamping groove which is arranged into 2-3 channels, and a wall breaking grid is placed in the grid clamping groove; the side wall of the shell is provided with a wall breaking input port and a wall breaking output port; the wall breaking input port is connected with the output port of the plunger pump through a conveying pipeline; the wall breaking output port is connected with the input port of the general squeezing dehydration equipment; the broken wall grids are provided with a group of 2-3 blocks, each broken wall grid is provided with holes, the sizes of the holes on the broken wall grids in the group are different, and the broken wall grids placed in the grid clamping grooves are sequentially arranged from large to small according to the sizes of the holes.
The grid broken wall device 7 is installed between the hydraulic plunger pump 1 and a general sludge squeezing device through the squeezing pipeline 9, a group of broken wall grids built in the grid broken wall device 7 can be replaced at any time, the back broken wall grid is smaller than the holes of the front broken wall grid, and the sludge is broken wall through the multistage grid, so that the secondary broken wall of the sludge is realized.
The sludge is generally municipal sludge, has a certain heat value after being squeezed and dehydrated, and can be combusted.
The method for breaking the wall of the sludge comprises the following specific steps:
step (1), when the hydraulic plunger pump 1 works, the feeding oil cylinder 3 opens the feeding valve plug 14 to open the feeding valve port 18; the discharging cylinder 17 closes the discharging valve plug 15 to seal the discharging valve port 19, the cylinder piston drives the cylinder piston 12 to retreat through the piston rod 4, and the sludge enters the cylinder 5 from the feed hopper 6, the feeding valve port 18 and the hopper body 13 under the action of negative pressure; after the material cylinder 5 is full of sludge, the material discharging cylinder 17 opens the material discharging valve plug 15 and opens the material discharging valve port 19; the feeding cylinder 3 closes the feeding valve plug 14 to close the feeding valve port 18, the cylinder piston drives the feeding cylinder piston 12 to advance through the piston rod 4, and the sludge is pushed to the broken wall pipeline 16 through the discharging valve port 19 and the discharging chamber 20, so that the sludge is circulated and reciprocated;
the hydrophilic structure of the sludge is destroyed by repeated extrusion of the hydraulic plunger pump 1 under high pressure, partial bonding bonds are broken, most of interstitial water and partial capillary water of sludge particles in the sludge flocculation group can be released to form free water, and the first pressurizing wall breaking of the sludge is realized;
step (2), the sludge after the first wall breaking enters a grid wall breaking device 7 through a wall breaking pipeline 16;
step (3), the sludge subjected to wall breaking treatment by the hydraulic plunger pump 1 enters a grating wall breaking device 7, 2-3 grating wall breaking gratings 8 of the grating wall breaking device 7, the pores of the later grating wall breaking grating are smaller than those of the former grating wall breaking grating 8, and a second grating wall breaking is carried out on the sludge; extruding, cutting and mixing the sludge again, and destroying the hydrophilic structure of the sludge again to form loose slurry which is convenient for quickly releasing the bound water by squeezing;
step (4), conveying the sludge processed into loose slurry to general sludge dewatering equipment through a pressing pipeline 9; the sludge of loose slurry is squeezed by common sludge dewatering equipment.
Claims (4)
1. A sludge wall breaking device for deep squeezing of sludge is characterized in that: the mud broken wall device comprises two parts, include: a hydraulic plunger pump and a grid wall breaking device; the hydraulic plunger pump is positioned in front of the grid wall breaking device and is connected through a wall breaking pipeline; the hydraulic plunger pump moves reciprocally to pressurize and release to pressurize and break the wall of the mud, the broken wall device of the grid breaks the wall of the mud grid, implement the double broken wall to the mud; the sludge subjected to double wall breaking is conveyed to general squeezing dehydration equipment through a squeezing pipeline connected with a grid wall breaking device, and the sludge is squeezed in the general squeezing dehydration equipment;
the hydraulic plunger pump includes: the device comprises a main pressure oil cylinder, a piston rod, a material cylinder, a feed hopper, a base, a cleaning water tank, a material cylinder piston, a hopper body and a reversing device; the cleaning water tank and the hopper body are arranged on the base; a main pressure oil cylinder is arranged on one side of the cleaning water tank; a material cylinder is arranged between the other side of the cleaning water tank and the hopper body; one end of the piston rod, which passes through the cleaning water tank, is positioned in the main pressure oil cylinder, and the other end of the piston rod is positioned in the material cylinder; the two ends of the piston rod are respectively provided with an oil cylinder piston and a material cylinder piston, the oil cylinder piston is positioned in the main pressure oil cylinder, and the material cylinder piston is positioned in the material cylinder; a feed hopper is arranged at the upper end of one side of the hopper body;
the reversing device comprises: the device comprises a feeding oil cylinder, a feeding valve plug, a discharging oil cylinder, a feeding valve port, a discharging valve port and a discharging chamber; the feeding oil cylinder is arranged on the side wall of the hopper body and is positioned on the hopper body above the material cylinder; a discharging chamber is connected to the other side wall of the hopper body, and the discharging chamber is positioned on the hopper body below the feeding hopper; a feeding valve port and a discharging valve port are arranged on the side wall of the hopper body at one side of the feeding hopper, the feeding valve port is positioned at the position of the feeding hopper, and the discharging valve port is positioned at the position of the discharging chamber; the end part of the feeding oil cylinder is connected with a feeding valve plug which is positioned in the hopper body and corresponds to the feeding valve port; the side wall of the discharging chamber is connected with a discharging oil cylinder and a broken wall pipeline, the end part of the discharging oil cylinder is connected with a discharging valve plug, and the discharging valve plug is positioned in the discharging chamber and corresponds to the discharging valve port;
the grid broken wall device include: the shell, the broken-wall grating and the grating clamping groove;
the shell is internally provided with a grid clamping groove which is arranged into 2-3 channels, and a wall breaking grid is placed in the grid clamping groove; the side wall of the shell is provided with a wall breaking input port and a wall breaking output port; the wall breaking input port is connected with the output port of the plunger pump through a conveying pipeline; the wall breaking output port is connected with the input port of the general squeezing dehydration equipment; the wall-broken grids are provided with a group of 2-3 blocks, each wall-broken grid is provided with holes, the sizes of the holes on the wall-broken grids in the group are different, and the wall-broken grids placed in the grid clamping grooves are sequentially arranged from large to small according to the sizes of the holes; the grid broken wall device is installed between the hydraulic plunger pump and the general sludge squeezing device through the squeezing pipeline, a group of built-in broken wall grids of the grid broken wall device can be replaced at any time, the later broken wall grid is smaller than the holes of the former broken wall grid, and the sludge is broken wall through the multistage grid, so that the secondary broken wall of the sludge is realized.
2. The sludge wall breaking device for deep pressing of sludge according to claim 1, characterized in that: the hydraulic plunger pump is a double-cylinder cone valve plunger pump; the pump can also be an S-pendulum plunger pump; or a single cylinder plunger pump.
3. The sludge wall breaking device for deep pressing of sludge according to claim 1, characterized in that: sludge, which refers to municipal sludge, has a certain heat value after being squeezed and dehydrated, and can be burnt.
4. The sludge wall breaking method based on the sludge wall breaking device for deep pressing of sludge, which is characterized by comprising the following steps of: the method for breaking the wall of the sludge comprises the following specific steps:
when the hydraulic plunger pump works, the feeding oil cylinder opens the feeding valve plug to open the feeding valve port; the discharging cylinder closes the discharging valve plug to seal the discharging valve port, the cylinder piston drives the cylinder piston to retreat through the piston rod, and the sludge enters the feeding cylinder from the feeding hopper, the feeding valve port and the hopper body under the action of negative pressure; after the material cylinder is full of sludge, the material discharging cylinder opens the material discharging valve plug, and opens the material discharging valve port; the feeding cylinder closes the feeding valve plug, the feeding valve port is closed, the cylinder piston drives the feeding cylinder piston to advance through the piston rod, and sludge is pushed to the broken wall pipeline through the discharging valve port and the discharging chamber, so that the sludge is circulated and reciprocated;
the hydrophilic structure of the sludge is destroyed by repeated extrusion of high pressure of a hydraulic plunger pump, partial bonding bonds are broken, most of interstitial water and partial capillary water of sludge particles in the sludge flocculation group can be released to form free water, and the first pressurizing wall breaking of the sludge is realized;
step (2), the sludge after the first wall breaking enters a grid wall breaking device through a wall breaking pipeline;
step (3), the sludge subjected to wall breaking treatment by a hydraulic plunger pump enters a grating wall breaking device, 2-3 grating walls of the grating wall breaking device, the holes of the later grating wall breaking device are smaller than those of the former grating wall breaking device, and a second grating wall breaking is carried out on the sludge; extruding, cutting and mixing the sludge again, and destroying the hydrophilic structure of the sludge again to form loose slurry which is convenient for quickly releasing the bound water by squeezing;
step (4), conveying the sludge processed into loose slurry to general sludge dewatering equipment through a squeezing pipeline; the sludge of loose slurry is squeezed by common sludge dewatering equipment.
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| CN110550840A (en) | 2019-12-10 |
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