CN109574457A - A kind of energy-saving and environment-friendly dewatering technology of mud - Google Patents
A kind of energy-saving and environment-friendly dewatering technology of mud Download PDFInfo
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- CN109574457A CN109574457A CN201811620577.7A CN201811620577A CN109574457A CN 109574457 A CN109574457 A CN 109574457A CN 201811620577 A CN201811620577 A CN 201811620577A CN 109574457 A CN109574457 A CN 109574457A
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Classifications
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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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- 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
-
- 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
- C02F11/16—Treatment of sludge; Devices therefor by de-watering, drying or thickening using drying or composting beds
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of energy-saving and environment-friendly dewatering technology of mud, comprising the following steps: it is lower seep filtering, prepare initial sludge slurry, prepare pretreating sludge, preparation secondary treatment sludge, separation of solid and liquid, natural desiccation, air-heater is dry and is granulated；The dewatering technology of mud, sludge is first handled into removal portion of water by lower infiltration, inorganic acid is added, also with deodorizing effect while dehydration can be helped, avoid fermentation rotten, then it is percolated and is dehydrated through filter cloth, again by occurring to be separated by solid-liquid separation by pressure in filter press after the mixing of addition inorganic fertilizer, mixing, drying and be granulated after natural desiccation, the mud pellet produced can apply to the fertilizer of crops, refuse reclamation, it can achieve energy-saving and environment-friendly effect, and the equipment requirement of the technique is lower, there is good promotion effect.
Description
Technical field
The present invention relates to technical field of sludge treatment, specially a kind of energy-saving and environment-friendly dewatering technology of mud.
Background technique
Sludge refers to the end product waste i.e. domestic sludge of sewage treatment plant, and prints and dyes, papermaking, plating, smelting, machine
The end product waste of the industries such as tool, oil refining, brewing, chemical pharmaceutical i.e. be referred to as industrial sludge, in addition there are also rivers, lake,
The sludge in pond is referred to as river sludge.With the development of national economy and the continuous improvement of people's lives, the discharge of sludge quantity
It is increasing.Requirement with the mankind to environmental protection is increasingly stringent, and correct, science, reasonably processing disposition sludge, have been pendulum
A project in face of us；
The main disposition means of sludge have at present: landfill, compost, burning；But landfill will cause land wastage, Er Qiehui
Cause secondary pollution, compost then needs to conserve that sunning evaporation water, occupied ground is more, transformation time is longer, equally can also be dirty
Contaminate environment；The equipment investment directly burned is big, operation cost is higher, but also can there are problems that toxic gas discharge；For this purpose,
It is proposed that a kind of energy-saving and environment-friendly dewatering technology of mud.
Summary of the invention
The purpose of the present invention is to provide a kind of energy-saving and environment-friendly dewatering technology of mud, to solve asking for background technique proposition
Topic.
A kind of energy-saving and environment-friendly dewatering technology of mud, comprising the following steps:
Step 1: surrounding and be separated on the ground smooth with earth embankment, the laying depth 50-80mm on the level land
Then rubble and sand are launched sludge to the surface of rubble and sand, evaporation reduction is blended under and banishes the dirt on showing up
The water content of mud, infitration process are 48-96 hours；
Step 2: the sludge after infiltration lower in step 1 is collected into sludge agitation equipment, 20-35% inorganic acid is added
Stirring, in 50-80r/min, mixing time is 60-120 minutes for mixing speed control, and precipitation processing is carried out after stirring, is obtained
To initial sludge slurry；
Step 3: prepare a face wire mesh, wire mesh both ends are welded in two metal supporting frames in left and right, so that golden
Belong to silk screen apart from about 5-10 centimeters of ground, one block of filter cloth in same size is fixed in the upper surface of wire mesh, by step 2
Obtained in initial sludge slurry take out and launch onto filter cloth so that the moisture in initial sludge slurry seeps filter cloth, be arranged so that 6-
Pretreating sludge is obtained after 12 hours；
Step 4: pretreating sludge is launched in mixing plant again, and 15-30% inorganic salts and macromolecule coagulation is added
Agent stirring, obtains secondary treatment sludge；
Step 5: inorganic fertilizer and chemical conditioner are added into secondary treatment sludge obtained in step 4, stirs evenly
After put into filter press and press, make sludge slurry occur to be separated by solid-liquid separation and form dehydrated sludge cake；
Step 6: dehydrated sludge cake obtained in step 5 is uniformly stacked, then natural desiccation 3-7 days puts into mud cake
48-72 hours dry into air drier, taking-up obtains dry mud cake；
Step 7: it will be granulated in dry mud cake investment pelletizer, obtain the mud pellet that diameter is 2-5 μm.
Preferably, water content of the sludge after lower infiltration is 75-85%. in the step 1
Preferably, in the step 2 inorganic acid be nitric acid, hydrochloric acid, hydroiodic acid or hydrobromic acid any one.
Preferably, the mixing speed in the step 4 is 70-110r/min, and mixing time is 30-45 minutes, when stirring
Temperature is 20-30 DEG C；Mixing speed in the step 5 is 80-130r/min, and mixing time is 20-35 minutes, when stirring
Temperature is 45-60 DEG C.
Preferably, in the step 5 inorganic fertilizer be calcium phosphate, potassium nitride, ammonium phosphate, plant ash, calcium magnesium phosphate appoint
It anticipates one or more, the chemical conditioner is any one of clay, bentonite, talcum powder or mica.
Compared with prior art, the beneficial effects of the present invention are: technique of the invention is more scientific and reasonable, the sludge is de-
Sludge is first handled removal portion of water by lower infiltration, inorganic acid is added, also has both while can helping dehydration by hydraulic art
There is deodorizing effect, avoid fermentation rotten, be then percolated and be dehydrated through filter cloth, then by being passed through after the mixing of addition inorganic fertilizer, mixing
It crosses pressure in filter press to occur to be separated by solid-liquid separation, dry and be granulated after natural desiccation, the mud pellet produced can apply to crops
Fertilizer, refuse reclamation can achieve energy-saving and environment-friendly effect, and the equipment requirement of the technique is lower, have and push away well
Wide effect.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment one:
A kind of energy-saving and environment-friendly dewatering technology of mud, comprising the following steps:
Step 1: surrounding and be separated on the ground smooth with earth embankment, and laying depth 50mm's is broken on the level land
Then stone and sand are launched sludge to the surface of rubble and sand, evaporation reduction is blended under and banishes the sludge on showing up
Water content, infitration process be 48 hours；
Step 2: the sludge after infiltration lower in step 1 is collected into sludge agitation equipment, 20% inorganic acid is added and stirs
It mixes, in 50r/min, mixing time is 60 minutes for mixing speed control, and precipitation processing is carried out after stirring, obtains initial sludge
Slurry；
Step 3: prepare a face wire mesh, wire mesh both ends are welded in two metal supporting frames in left and right, so that golden
Belong to silk screen apart from about 5 centimeters of ground, one block of filter cloth in same size is fixed in the upper surface of wire mesh, will obtain in step 2
To initial sludge slurry take out and launch on filter cloth so that the moisture in initial sludge slurry seeps filter cloth, after being arranged so that 6 hours
Obtain pretreating sludge；
Step 4: pretreating sludge is launched in mixing plant again, and 15% inorganic salts and high-molecular coagulant adopting is added
Stirring, obtains secondary treatment sludge；
Step 5: inorganic fertilizer and chemical conditioner are added into secondary treatment sludge obtained in step 4, stirs evenly
After put into filter press and press, make sludge slurry occur to be separated by solid-liquid separation and form dehydrated sludge cake；
Step 6: dehydrated sludge cake obtained in step 5 is uniformly stacked, then natural desiccation 3 days is put into mud cake
48 hours dry in air drier, taking-up obtains dry mud cake；
Step 7: it will be granulated in dry mud cake investment pelletizer, obtain the mud pellet that diameter is 2 μm.
Further, water content of the sludge after lower infiltration is 75%. in step 1
Further, inorganic acid is nitric acid in step 2.
Further, the mixing speed in step 4 is 70r/min, and mixing time is 30 minutes, and temperature is 20 when stirring
℃；Mixing speed in step 5 is 80r/min, and mixing time is 20 minutes, and temperature is 45 DEG C when stirring.
Further, inorganic fertilizer is calcium phosphate in step 5, and chemical conditioner is clay.
Embodiment two:
A kind of energy-saving and environment-friendly dewatering technology of mud, comprising the following steps:
Step 1: surrounding and be separated on the ground smooth with earth embankment, and laying depth 60mm's is broken on the level land
Then stone and sand are launched sludge to the surface of rubble and sand, evaporation reduction is blended under and banishes the sludge on showing up
Water content, infitration process be 60 hours；
Step 2: the sludge after infiltration lower in step 1 is collected into sludge agitation equipment, 25% inorganic acid is added and stirs
It mixes, in 60r/min, mixing time is 80 minutes for mixing speed control, and precipitation processing is carried out after stirring, obtains initial sludge
Slurry；
Step 3: prepare a face wire mesh, wire mesh both ends are welded in two metal supporting frames in left and right, so that golden
Belong to silk screen apart from about 7 centimeters of ground, one block of filter cloth in same size is fixed in the upper surface of wire mesh, will obtain in step 2
To initial sludge slurry take out and launch on filter cloth so that the moisture in initial sludge slurry seeps filter cloth, after being arranged so that 8 hours
Obtain pretreating sludge；
Step 4: pretreating sludge is launched in mixing plant again, and 20% inorganic salts and high-molecular coagulant adopting is added
Stirring, obtains secondary treatment sludge；
Step 5: inorganic fertilizer and chemical conditioner are added into secondary treatment sludge obtained in step 4, stirs evenly
After put into filter press and press, make sludge slurry occur to be separated by solid-liquid separation and form dehydrated sludge cake；
Step 6: dehydrated sludge cake obtained in step 5 is uniformly stacked, then natural desiccation 4 days is put into mud cake
56 hours dry in air drier, taking-up obtains dry mud cake；
Step 7: it will be granulated in dry mud cake investment pelletizer, obtain the mud pellet that diameter is 3 μm.
Further, water content of the sludge after lower infiltration is 78%. in step 1
Further, inorganic acid is hydrochloric acid in step 2.
Further, the mixing speed in step 4 is 80r/min, and mixing time is 35 minutes, and temperature is 24 when stirring
℃；Mixing speed in step 5 is 100r/min, and mixing time is 25 minutes, and temperature is 45-60 DEG C when stirring.
Further, inorganic fertilizer is potassium nitride and ammonium phosphate in step 5, and chemical conditioner is bentonite.
Embodiment three:
A kind of energy-saving and environment-friendly dewatering technology of mud, comprising the following steps:
Step 1: surrounding and be separated on the ground smooth with earth embankment, and laying depth 70mm's is broken on the level land
Then stone and sand are launched sludge to the surface of rubble and sand, evaporation reduction is blended under and banishes the sludge on showing up
Water content, infitration process be 82 hours；
Step 2: the sludge after infiltration lower in step 1 is collected into sludge agitation equipment, 30% inorganic acid is added and stirs
It mixes, in 70r/min, mixing time is 100 minutes for mixing speed control, and precipitation processing is carried out after stirring, obtains initial dirt
Mud；
Step 3: prepare a face wire mesh, wire mesh both ends are welded in two metal supporting frames in left and right, so that golden
Belong to silk screen apart from about 8 centimeters of ground, one block of filter cloth in same size is fixed in the upper surface of wire mesh, will obtain in step 2
To initial sludge slurry take out and launch on filter cloth so that the moisture in initial sludge slurry seeps filter cloth, be arranged so that 10 hours
After obtain pretreating sludge；
Step 4: pretreating sludge is launched in mixing plant again, and 25% inorganic salts and high-molecular coagulant adopting is added
Stirring, obtains secondary treatment sludge；
Step 5: inorganic fertilizer and chemical conditioner are added into secondary treatment sludge obtained in step 4, stirs evenly
After put into filter press and press, make sludge slurry occur to be separated by solid-liquid separation and form dehydrated sludge cake；
Step 6: dehydrated sludge cake obtained in step 5 is uniformly stacked, then natural desiccation 6 days is put into mud cake
65 hours dry in air drier, taking-up obtains dry mud cake；
Step 7: it will be granulated in dry mud cake investment pelletizer, obtain the mud pellet that diameter is 4 μm.
Further, water content of the sludge after lower infiltration is 82%. in step 1
Further, inorganic acid is hydroiodic acid in step 2.
Further, the mixing speed in step 4 is 100r/min, and mixing time is 40 minutes, and temperature is 27 when stirring
℃；Mixing speed in step 5 is 120r/min, and mixing time is 30 minutes, and temperature is 55 DEG C when stirring.
Further, inorganic fertilizer is ammonium phosphate and plant ash in step 5, and chemical conditioner is talcum powder.
Example IV:
A kind of energy-saving and environment-friendly dewatering technology of mud, comprising the following steps:
Step 1: surrounding and be separated on the ground smooth with earth embankment, and laying depth 80mm's is broken on the level land
Then stone and sand are launched sludge to the surface of rubble and sand, evaporation reduction is blended under and banishes the sludge on showing up
Water content, infitration process be 96 hours；
Step 2: the sludge after infiltration lower in step 1 is collected into sludge agitation equipment, 35% inorganic acid is added and stirs
It mixes, in 80r/min, mixing time is 120 minutes for mixing speed control, and precipitation processing is carried out after stirring, obtains initial dirt
Mud；
Step 3: prepare a face wire mesh, wire mesh both ends are welded in two metal supporting frames in left and right, so that golden
Belong to silk screen apart from about 10 centimeters of ground, one block of filter cloth in same size is fixed in the upper surface of wire mesh, will be in step 2
Obtained initial sludge slurry, which takes out, to be launched onto filter cloth, so that the moisture in initial sludge slurry seeps filter cloth, is arranged so that 12 is small
When after obtain pretreating sludge；
Step 4: pretreating sludge is launched in mixing plant again, and 30% inorganic salts and high-molecular coagulant adopting is added
Stirring, obtains secondary treatment sludge；
Step 5: inorganic fertilizer and chemical conditioner are added into secondary treatment sludge obtained in step 4, stirs evenly
After put into filter press and press, make sludge slurry occur to be separated by solid-liquid separation and form dehydrated sludge cake；
Step 6: dehydrated sludge cake obtained in step 5 is uniformly stacked, then natural desiccation 7 days is put into mud cake
72 hours dry in air drier, taking-up obtains dry mud cake；
Step 7: it will be granulated in dry mud cake investment pelletizer, obtain the mud pellet that diameter is 5 μm.
Further, water content of the sludge after lower infiltration is 85%. in step 1
Further, inorganic acid is hydrobromic acid in step 2.
Further, the mixing speed in step 4 is 110r/min, and mixing time is 45 minutes, and temperature is 30 when stirring
℃；Mixing speed in step 5 is 130r/min, and mixing time is 35 minutes, and temperature is 60 DEG C when stirring.
Further, inorganic fertilizer is plant ash and calcium magnesium phosphate in step 5, and chemical conditioner is mica.
Above four groups of embodiments are the dewatering process of sludge, and technique of the invention is more scientific and reasonable, the dirt
Sludge is first handled removal portion of water by lower infiltration, inorganic acid is added, gone back while can helping dehydration by mud dewatering process
It with deodorizing effect, avoids fermentation rotten, is then percolated and is dehydrated through filter cloth, then pass through the mixing of addition inorganic fertilizer, mixing
Occur to be separated by solid-liquid separation by pressure in filter press afterwards, dry and be granulated after natural desiccation, the mud pellet produced can apply to farming
The fertilizer of object, refuse reclamation can achieve energy-saving and environment-friendly effect, and the equipment requirement of the technique is lower, have fine
Promotion effect.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of energy-saving and environment-friendly dewatering technology of mud, which comprises the following steps:
Step 1: surrounding and be separated on the ground smooth with earth embankment, the rubble of laying depth 50-80mm on the level land
And sand, then sludge is launched to the surface of rubble and sand, evaporation reduction is blended under and banishes the sludge on showing up
Water content, infitration process are 48-96 hours；
Step 2: the sludge after infiltration lower in step 1 is collected into sludge agitation equipment, 20-35% inorganic acid is added and stirs
It mixes, in 50-80r/min, mixing time is 60-120 minutes for mixing speed control, and precipitation processing is carried out after stirring, is obtained
Initial sludge slurry；
Step 3: prepare a face wire mesh, wire mesh both ends are welded in two metal supporting frames in left and right, so that wire
For net apart from about 5-10 centimeters of ground, one block of filter cloth in same size is fixed in the upper surface of wire mesh, will obtain in step 2
To initial sludge slurry take out and launch on filter cloth so that the moisture in initial sludge slurry seeps filter cloth, be arranged so that 6-12 is small
When after obtain pretreating sludge；
Step 4: pretreating sludge is launched in mixing plant again, and 15-30% inorganic salts are added and high-molecular coagulant adopting stirs
It mixes, obtains secondary treatment sludge；
Step 5: inorganic fertilizer and chemical conditioner are added into secondary treatment sludge obtained in step 4, throws after mixing evenly
Enter and press into filter press, sludge slurry is made to occur to be separated by solid-liquid separation and forms dehydrated sludge cake；
Step 6: dehydrated sludge cake obtained in step 5 is uniformly stacked, then mud cake is put into heat by natural desiccation 3-7 days
48-72 hours dry in wind drying machine, taking-up obtains dry mud cake；
Step 7: it will be granulated in dry mud cake investment pelletizer, obtain the mud pellet that diameter is 2-5 μm.
2. a kind of energy-saving and environment-friendly dewatering technology of mud according to claim 1, it is characterised in that: sludge passes through in the step 1
The water content crossed down after seeping is 75-85%.
3. a kind of energy-saving and environment-friendly dewatering technology of mud according to claim 1, it is characterised in that: inorganic strong in the step 2
Acid is any one of nitric acid, hydrochloric acid, hydroiodic acid or hydrobromic acid.
4. a kind of energy-saving and environment-friendly dewatering technology of mud according to claim 1, it is characterised in that: the stirring in the step 4
Speed is 70-110r/min, and mixing time is 30-45 minute, and temperature is 20-30 DEG C when stirring；Stirring in the step 5
Speed is 80-130r/min, and mixing time is 20-35 minute, and temperature is 45-60 DEG C when stirring.
5. a kind of energy-saving and environment-friendly dewatering technology of mud according to claim 1, it is characterised in that: inorganic fertilizer in the step 5
Material be calcium phosphate, potassium nitride, ammonium phosphate, plant ash, calcium magnesium phosphate any one or more, the chemical conditioner be clay,
Any one of bentonite, talcum powder or mica.
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| CN201811620577.7A CN109574457A (en) | 2018-12-28 | 2018-12-28 | A kind of energy-saving and environment-friendly dewatering technology of mud |
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| CN201811620577.7A CN109574457A (en) | 2018-12-28 | 2018-12-28 | A kind of energy-saving and environment-friendly dewatering technology of mud |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786908A (en) * | 2010-02-04 | 2010-07-28 | 苏州群瑞环保科技有限公司 | Method for producing compound fertilizer by industry sludge |
| CN101921050A (en) * | 2010-08-03 | 2010-12-22 | 中国船舶重工集团公司第七○二研究所 | Device and method for dewatering and drying mud under water |
| CN103663887A (en) * | 2012-09-06 | 2014-03-26 | 郑百祥 | Sludge treatment method and treatment system |
-
2018
- 2018-12-28 CN CN201811620577.7A patent/CN109574457A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786908A (en) * | 2010-02-04 | 2010-07-28 | 苏州群瑞环保科技有限公司 | Method for producing compound fertilizer by industry sludge |
| CN101921050A (en) * | 2010-08-03 | 2010-12-22 | 中国船舶重工集团公司第七○二研究所 | Device and method for dewatering and drying mud under water |
| CN103663887A (en) * | 2012-09-06 | 2014-03-26 | 郑百祥 | Sludge treatment method and treatment system |
Non-Patent Citations (1)
| Title |
|---|
| 苏会东 等: "《水污染控制工程》", 31 May 2017, 中国建材工业出版社 * |
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