CN108751591B - Printing and dyeing wastewater treatment method and system - Google Patents
Printing and dyeing wastewater treatment method and system Download PDFInfo
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- CN108751591B CN108751591B CN201810633735.6A CN201810633735A CN108751591B CN 108751591 B CN108751591 B CN 108751591B CN 201810633735 A CN201810633735 A CN 201810633735A CN 108751591 B CN108751591 B CN 108751591B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
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- 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
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- 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
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
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- Food Science & Technology (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
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Abstract
The invention discloses a printing and dyeing wastewater treatment method and a system, wherein printing and dyeing wastewater is treated by a pre-filtering tank, a flocculation sedimentation tank, a hydrolysis acidification tank, an aerobic tank, an air flotation tank, an activated carbon tank and a secondary sedimentation tank in sequence, and then the treated water is stored in a clear water tank; then, the sludge in the flocculation sedimentation tank and the secondary sedimentation tank is sent into a sludge recovery tank, the sludge in the sludge recovery tank is sent into a high-pressure plate-and-frame filter press for filter pressing to respectively obtain dry sludge and filtered water, the filtered water reflows to the hydrolysis acidification tank again through a pipeline, and the dry sludge enters a sludge recovery tank; and (3) after the sludge enters a high-pressure plate-and-frame filter press, performing high-pressure filter pressing, drying and air drying to obtain dry sludge, and then entering a sludge recovery box. The invention has the characteristic of improving the sludge dewatering effect.
Description
Technical Field
The invention relates to a printing and dyeing wastewater treatment system, in particular to a printing and dyeing wastewater treatment method and system.
Background
Printing and dyeing enterprises can produce a large amount of printing and dyeing waste water in the production process, be rich in the pollutant of different grade type such as suspended solid, dyestuff auxiliary agent, macromolecular compound in the printing and dyeing waste water, the composition is comparatively complicated, need get rid of the pollutant of different compositions in the printing and dyeing sewage step by step through filtration, flocculation and precipitation, add multichannel processing procedures such as medicine oxidation in proper order, will reach the qualified water that discharges the requirement at last and discharge or recycle. Because the sludge obtained in the treatment process of the printing and dyeing sewage contains a large amount of water, the sludge is generally subjected to extrusion dewatering treatment by a plate-and-frame filter press or a belt filter press, but the dewatering effect is poor. Therefore, the prior art has the problem of poor sludge dewatering effect.
Disclosure of Invention
The invention aims to provide a printing and dyeing wastewater treatment method and system. The invention has the characteristic of improving the sludge dewatering effect.
The technical scheme of the invention is as follows: a circular treatment method for printing and dyeing wastewater comprises the following steps:
firstly, sending printing and dyeing wastewater into a pre-filtering tank for filtering, and removing suspended matters and floating matters in the printing and dyeing wastewater to obtain a liquid a;
secondly, feeding the solution a into a flocculation sedimentation tank, carrying out flocculation reaction on the solution a in the flocculation sedimentation tank, settling organic matters in the solution a, and carrying out vertical separation on solid and liquid to obtain solution b;
thirdly, sending the solution b into a hydrolysis acidification tank, and carrying out acidification treatment on the solution b to obtain solution c;
fourthly, feeding the liquid c into an aerobic tank, and degrading organic matters in the liquid c to obtain a liquid d;
fifthly, sending the solution d into an air floatation tank, and removing suspended particles in the solution d to obtain solution e;
sixthly, feeding the liquid e into an activated carbon tank, and performing adsorption filtration through the activated carbon tank to obtain a liquid f;
step seven, sending the solution f into a secondary sedimentation tank for standing and sedimentation, and obtaining solution g after solid-liquid separation;
eighthly, delivering the solution g into a clean water tank for storage;
and (2) conveying the sludge in the flocculation sedimentation tank and the secondary sedimentation tank into a sludge recovery tank, conveying the sludge in the sludge recovery tank into a high-pressure plate-and-frame filter press for filter pressing to respectively obtain dry sludge and filtered water, returning the filtered water to the hydrolysis acidification tank again through a pipeline, and feeding the dry sludge into a sludge recovery tank.
In the circular treatment method of the printing and dyeing wastewater, the sludge enters a high-pressure plate-and-frame filter press, is subjected to high-pressure filter pressing, drying and air drying to obtain dry sludge, and then enters a sludge recovery tank.
A printing and dyeing wastewater treatment system comprises a pre-filtering tank, a flocculation sedimentation tank, a hydrolysis acidification tank, an aerobic tank, an air flotation tank, an activated carbon tank, a secondary sedimentation tank and a clean water tank which are sequentially connected through pipelines; the flocculation sedimentation tank and the secondary sedimentation tank are connected with a sludge recovery tank through pipelines, and the sludge recovery tank is connected with a high-pressure plate-and-frame filter press through a pipeline; the high-pressure plate-and-frame filter press comprises a frame, wherein a bearing plate, a filter pressing device and a pressing device are sequentially arranged on the upper part of the frame, a sludge conveying belt is arranged on the lower part of the frame, and a sludge recovery box is arranged at the discharge end of the sludge conveying belt; the middle part of the frame is provided with a crushing and drying mechanism corresponding to the filter pressing device; the mud residue conveying belt comprises a conveying belt body with a hollow structure, and a mud residue filtering net is arranged on the outer surface of the conveying belt body; an air suction mechanism is arranged below the sludge conveying belt, and a drying mechanism is arranged at the side end of the sludge conveying belt.
In the printing and dyeing wastewater treatment system, the filter pressing device comprises slide rails arranged on the front side and the rear side of the upper part of the frame, a plurality of diaphragm filter plates are arranged on the slide rails, telescopic rods are arranged between the adjacent diaphragm filter plates and between the diaphragm filter plates and the pressure bearing plate, and springs are sleeved on the telescopic rods.
In the printing and dyeing wastewater treatment system, a filter-pressing device is arranged below the filter-pressing device and is fixed on the frame, and the filter-pressing device is connected with a hydrolysis acidification tank through a pipeline.
In the printing and dyeing wastewater treatment system, the pressure bearing plate is provided with the sludge feeding hole.
In the printing and dyeing wastewater treatment system, the crushing and drying mechanism comprises a mud cake crushing box which is arranged in the middle of the frame and has a conical structure corresponding to the position of the filter pressing device, and an outlet of the mud cake crushing box corresponds to the mud residue conveying belt; the mud cake smashes the incasement and is equipped with main crushing roller, and main crushing roller below is equipped with two stoving squeeze rolls that distribute side by side, and stoving squeeze roll below is equipped with the supplementary crushing roller that is located the export of mud cake crushing case, and main crushing roller and supplementary crushing roller surface are equipped with the arc arch.
In the printing and dyeing wastewater treatment system, the drying and squeezing roller comprises a stainless steel roller body with a hollow structure, and a heating coil is arranged in the stainless steel roller body.
In the printing and dyeing wastewater treatment system, the pressing device comprises a hydraulic cylinder fixed on the frame, a pressing plate matched with the filter pressing device is arranged at the extending end of the hydraulic cylinder, and the pressing plate is embedded with the sliding rail.
In the printing and dyeing wastewater treatment system, the air suction mechanism comprises an air suction cover arranged below the sludge conveying belt, and the air suction cover is connected with an air suction pump through a pipeline; the air suction opening of the air suction cover is arranged upwards.
Compared with the prior art, the method has the advantages that the printing and dyeing wastewater is sequentially treated by the pre-filtering tank, the flocculation sedimentation tank, the hydrolysis acidification tank, the aerobic tank, the air floatation tank, the activated carbon tank and the secondary sedimentation tank which are sequentially connected, and finally, the reusable industrial water is obtained; the method comprises the following steps of (1) sending sludge in a flocculation sedimentation tank and a secondary sedimentation tank into a sludge recovery tank through a pipeline, enabling the sludge to enter a high-pressure plate-and-frame filter press for filter pressing, enabling the high-pressure plate-and-frame filter press to carry out primary filter pressing on the sludge through a filter pressing device, a bearing plate and a pressing device to obtain a relatively dry sludge cake, enabling the sludge cake to pass through crushing of a main crushing roller in a sludge cake crushing box of a crushing and drying mechanism and drying and extruding of a drying extrusion roller to obtain secondary extrusion drying sludge, enabling the sludge cake after secondary drying to pass through crushing of an auxiliary crushing roller and then enter a sludge conveying belt, carrying out air drying on the sludge cake through an air suction mechanism, enabling the sludge cake to be subjected to tertiary drying treatment to obtain dry sludge; and, through set up the mechanism that induced drafts below the mud sediment conveyer belt on upper strata, can also be with the absorption of mud sediment firmly on the mud sediment conveyer belt, prevent the raise dust. In conclusion, the invention has the characteristic of improving the sludge dewatering effect.
Drawings
FIG. 1 is a process flow diagram of the present invention;
figure 2 is a schematic structural diagram of a high pressure plate and frame filter press.
The labels in the figures are: 1-a pre-filtering tank, 2-a flocculation sedimentation tank, 3-a hydrolysis acidification tank, 4-an aerobic tank, 5-an air flotation tank, 6-an activated carbon tank, 7-a secondary sedimentation tank, 8-a clean water tank, 9-a sludge recovery tank, 10-a high-pressure plate-and-frame filter press, 11-a rack, 12-a bearing plate, 13-a filter pressing device, 14-a pressing device, 15-a sludge conveying belt, 16-a sludge recovery tank, 17-a slide rail, 18-a diaphragm filter plate, 19-a telescopic rod, 20-a spring, 21-a sludge cake crushing tank, 22-a main crushing roller, 23-a drying extrusion roller, 24-an auxiliary crushing roller, 25-a hydraulic cylinder, 26-a pressing plate, 27-an air suction hood and 28-a drying mechanism.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Examples are given. A printing and dyeing wastewater treatment method comprises the following steps:
firstly, sending printing and dyeing wastewater into a pre-filtering tank for filtering, and removing suspended matters and floating matters in the printing and dyeing wastewater to obtain a liquid a;
secondly, feeding the solution a into a flocculation sedimentation tank, carrying out flocculation reaction on the solution a in the flocculation sedimentation tank, settling organic matters in the solution a, and carrying out vertical separation on solid and liquid to obtain solution b;
thirdly, sending the solution b into a hydrolysis acidification tank, and carrying out acidification treatment on the solution b to obtain solution c;
fourthly, feeding the liquid c into an aerobic tank, and degrading organic matters in the liquid c to obtain a liquid d;
fifthly, sending the solution d into an air floatation tank, and removing suspended particles in the solution d to obtain solution e;
sixthly, feeding the liquid e into an activated carbon tank, and performing adsorption filtration through the activated carbon tank to obtain a liquid f;
step seven, sending the solution f into a secondary sedimentation tank for standing and sedimentation, and obtaining solution g after solid-liquid separation;
eighthly, delivering the solution g into a clean water tank for storage;
and (2) conveying the sludge in the flocculation sedimentation tank and the secondary sedimentation tank into a sludge recovery tank, conveying the sludge in the sludge recovery tank into a high-pressure plate-and-frame filter press for filter pressing to respectively obtain dry sludge and filtered water, returning the filtered water to the hydrolysis acidification tank again through a pipeline, and feeding the dry sludge into a sludge recovery tank.
And (3) after the sludge enters a high-pressure plate-and-frame filter press, performing high-pressure filter pressing, drying and air drying to obtain dry sludge, and then entering a sludge recovery box.
And the connecting pipelines between the reaction tanks are provided with delivery pumps.
A printing and dyeing wastewater treatment system is shown in figures 1 to 2 and comprises a pre-filtering tank 1, a flocculation sedimentation tank 2, a hydrolysis acidification tank 3, an aerobic tank 4, an air flotation tank 5, an activated carbon tank 6, a secondary sedimentation tank 7 and a clean water tank 8 which are connected in sequence through pipelines; the flocculation sedimentation tank 2 and the secondary sedimentation tank 7 are connected with a sludge recovery tank 9 through pipelines, and the sludge recovery tank 9 is connected with a high-pressure plate-and-frame filter press 10 through pipelines; the high-pressure plate-and-frame filter press 10 comprises a frame 11, wherein a bearing plate 12, a filter press device 13 and a pressing device 14 are sequentially arranged at the upper part of the frame 11, a sludge conveying belt 15 is arranged at the lower part of the frame 11, and a sludge recovery box 16 is arranged at the discharge end of the sludge conveying belt 15; the middle part of the frame 11 is provided with a crushing and drying mechanism corresponding to the filter pressing device 13; the sludge conveying belt 15 comprises a conveying belt body with a hollow structure, and a sludge filter screen is arranged on the outer surface of the conveying belt body; an air suction mechanism is arranged below the sludge conveying belt 15, and a drying mechanism 28 is arranged at the side end of the sludge conveying belt 15.
The filter pressing device 13 comprises slide rails 17 arranged on the front side and the rear side of the upper portion of the frame 11, a plurality of diaphragm filter plates 18 are arranged on the slide rails 17, telescopic rods 19 are arranged between the adjacent diaphragm filter plates 18 and between the diaphragm filter plates 18 and the pressure bearing plate 12, and springs 20 are sleeved on the telescopic rods 19.
And a filter water collecting pipe fixed on the frame 11 is arranged below the filter pressing device 13, and the filter water collecting pipe is connected with the hydrolysis acidification tank 3 through a pipeline.
And a sludge feeding hole is formed in the pressure bearing plate 12.
The crushing and drying mechanism comprises a mud cake crushing box 21 which is arranged in the middle of the frame 11 and has a conical structure corresponding to the position of the filter pressing device 13, and the outlet of the mud cake crushing box 21 corresponds to the mud residue conveying belt 15; the mud cake smashes the incasement and is equipped with main crushing roller 22 in the case 21, and main crushing roller 22 below is equipped with two stoving squeeze roll 23 that distribute side by side, and stoving squeeze roll 23 below is equipped with the supplementary crushing roller 24 that is located the export of mud cake crushing case 21, and main crushing roller 22 and supplementary crushing roller 24 surface are equipped with the arc arch.
The drying squeeze roller 23 comprises a stainless steel roller body with a hollow structure, and a heating coil is arranged in the stainless steel roller body.
The pressing device 14 comprises a hydraulic cylinder 25 fixed on the frame 11, a pressing plate 26 matched with the filter pressing device 13 is arranged at the extending end of the hydraulic cylinder 25, and the pressing plate 26 is embedded with the slide rail 17.
The air suction mechanism comprises an air suction cover 27 arranged below the sludge conveying belt 15, and the air suction cover 27 is connected with an air suction pump through a pipeline; the air suction inlet of the air suction hood 27 is arranged upwards.
The diaphragm filter plate comprises a filter frame, a core plate is arranged in the filter frame, and rubber membranes are arranged on two sides of the core plate; and the corners of the filter frame are provided with feed holes. The filter frame is also provided with an air blowing port, the frame is provided with an air blowing pipe corresponding to the air blowing port, and the bottom of the filter frame is also provided with a liquid outlet. And the liquid outlet is positioned between the core plate and the rubber film. And the frame is also provided with an air blowing pipe connected with the diaphragm filter plate.
The drying mechanism may be an oven.
The main crushing roller and the mud cake crushing box are connected in a rotating mode, the mud cake falls to the main crushing roller to drive the main crushing roller to rotate, the auxiliary crushing roller is connected with the first motor through a transmission belt, the drying squeezing rollers are connected with one another through a transmission gear, and one of the drying squeezing rollers is connected with the second motor.
The working process of the high-pressure plate-and-frame filter press is as follows: the compacting device acts on the filter pressing device, so that the diaphragm filter plates of the filter pressing device are tightly attached to each other, then sludge is fed into the filter pressing device through the sludge feeding hole, a containing cavity is formed between the adjacent diaphragm filter plates, the sludge enters the containing cavity, when the containing cavity is filled with the sludge, the sludge is continuously input, extrusion force is generated on the sludge in the containing cavity, so that moisture in the sludge is extruded, filtered water flows into the filtered water collecting pipe through the liquid outlet on the diaphragm filter plates, and then the filtered water is pumped into the hydrolysis acidification tank for re-filtration; after the mud extrusion is accomplished, form the mud cake, closing device resets, and the mutual separation of diaphragm filter plate under the effect of spring force, and all mud cakes will fall into the mud cake and smash the incasement, smash the mud cake through main crushing roller, then extrude the stoving through the stoving squeeze roll to the mud residue after smashing, further smash the mud residue through supplementary crushing roller at last for the mud residue particle diameter that gets into on the mud residue conveyer belt is less, is convenient for air-dry and adsorb, and mud residue sends into the mud residue collection box through the mud residue conveyer belt at last.
Claims (1)
1. The printing and dyeing wastewater treatment method is characterized by comprising the following steps:
firstly, sending printing and dyeing wastewater into a pre-filtering tank for filtering, and removing suspended matters and floating matters in the printing and dyeing wastewater to obtain a liquid a;
secondly, feeding the solution a into a flocculation sedimentation tank, carrying out flocculation reaction on the solution a in the flocculation sedimentation tank, settling organic matters in the solution a, and carrying out vertical separation on solid and liquid to obtain solution b;
thirdly, sending the solution b into a hydrolysis acidification tank, and carrying out acidification treatment on the solution b to obtain solution c;
fourthly, feeding the liquid c into an aerobic tank, and degrading organic matters in the liquid c to obtain a liquid d;
fifthly, sending the solution d into an air floatation tank, and removing suspended particles in the solution d to obtain solution e;
sixthly, feeding the liquid e into an activated carbon tank, and performing adsorption filtration through the activated carbon tank to obtain a liquid f;
step seven, sending the solution f into a secondary sedimentation tank for standing and sedimentation, and obtaining solution g after solid-liquid separation;
eighthly, delivering the solution g into a clean water tank for storage;
feeding the sludge in the flocculation sedimentation tank and the secondary sedimentation tank into a sludge recovery tank, feeding the sludge in the sludge recovery tank into a high-pressure plate-and-frame filter press for filter pressing to respectively obtain dry sludge and filtered water, returning the filtered water to the hydrolysis acidification tank again through a pipeline, and feeding the dry sludge into a sludge recovery tank;
after the sludge enters a high-pressure plate-and-frame filter press, performing high-pressure filter pressing, drying and air drying to obtain dry sludge, and then entering a sludge recovery box;
a treatment system of a printing and dyeing wastewater treatment method comprises a pre-filtering tank (1), a flocculation sedimentation tank (2), a hydrolysis acidification tank (3), an aerobic tank (4), an air floatation tank (5), an activated carbon tank (6), a secondary sedimentation tank (7) and a clean water tank (8) which are sequentially connected through pipelines; the flocculation sedimentation tank (2) and the secondary sedimentation tank (7) are connected with a sludge recovery tank (9) through pipelines, and the sludge recovery tank (9) is connected with a high-pressure plate-and-frame filter press (10) through pipelines; the high-pressure plate-and-frame filter press (10) comprises a frame (11), wherein a bearing plate (12), a filter pressing device (13) and a pressing device (14) are sequentially arranged on the upper part of the frame (11), a sludge conveying belt (15) is arranged on the lower part of the frame (11), and a sludge recovery box (16) is arranged at the discharge end of the sludge conveying belt (15); the middle part of the frame (11) is provided with a crushing and drying mechanism corresponding to the filter pressing device (13); the mud residue conveying belt (15) comprises a conveying belt body with a hollow structure, and a mud residue filter screen is arranged on the outer surface of the conveying belt body; an air suction mechanism is arranged below the sludge conveying belt (15), and a drying mechanism (28) is arranged at the side end of the sludge conveying belt (15);
the filter pressing device (13) comprises slide rails (17) arranged on the front side and the rear side of the upper part of the frame (11), a plurality of diaphragm filter plates (18) are arranged on the slide rails (17), telescopic rods (19) are arranged between adjacent diaphragm filter plates (18) and between the diaphragm filter plates (18) and the pressure bearing plate (12), and springs (20) are sleeved on the telescopic rods (19);
a filter water collecting pipe fixed on the frame (11) is arranged below the filter pressing device (13), and the filter water collecting pipe is connected with the hydrolysis acidification tank (3) through a pipeline;
a sludge feeding hole is formed in the pressure bearing plate (12);
the crushing and drying mechanism comprises a mud cake crushing box (21) which is arranged in the middle of the frame (11) and has a conical structure corresponding to the position of the filter pressing device (13), and the outlet of the mud cake crushing box (21) corresponds to the mud residue conveying belt (15); a main crushing roller (22) is arranged in the mud cake crushing box (21), two drying squeeze rollers (23) which are distributed side by side are arranged below the main crushing roller (22), an auxiliary crushing roller (24) which is positioned at an outlet of the mud cake crushing box (21) is arranged below the drying squeeze rollers (23), and arc-shaped bulges are arranged on the surfaces of the main crushing roller (22) and the auxiliary crushing roller (24);
the drying extrusion roller (23) comprises a stainless steel roller body with a hollow structure, and a heating coil is arranged in the stainless steel roller body;
the pressing device (14) comprises a hydraulic cylinder (25) fixed on the frame (11), a pressing plate (26) matched with the filter pressing device (13) is arranged at the extending end of the hydraulic cylinder (25), and the pressing plate (26) is embedded with the slide rail (17);
the air suction mechanism comprises an air suction cover (27) arranged below the sludge conveying belt (15), and the air suction cover (27) is connected with an air suction pump through a pipeline; the air suction opening of the air suction cover (27) is arranged upwards.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810633735.6A CN108751591B (en) | 2018-06-20 | 2018-06-20 | Printing and dyeing wastewater treatment method and system |
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| CN201810633735.6A CN108751591B (en) | 2018-06-20 | 2018-06-20 | Printing and dyeing wastewater treatment method and system |
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| CN108751591A CN108751591A (en) | 2018-11-06 |
| CN108751591B true CN108751591B (en) | 2021-03-30 |
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