CN104140187B - A kind of mud steam-tube rotatory dryer drying means - Google Patents
A kind of mud steam-tube rotatory dryer drying means Download PDFInfo
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- CN104140187B CN104140187B CN201410341724.2A CN201410341724A CN104140187B CN 104140187 B CN104140187 B CN 104140187B CN 201410341724 A CN201410341724 A CN 201410341724A CN 104140187 B CN104140187 B CN 104140187B
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Abstract
The present invention relates to a kind of mud steam-tube rotatory dryer drying means, the method comprises the following steps: (1) wet mud enters in steam-tube rotatory dryer from opening for feed; Low-pressure saturated steam enters in steam-tube rotatory dryer from steam inlet simultaneously, after drying, obtains water of condensation, dried material and tail gas respectively; (2) water of condensation is discharged from condensation-water drain and is entered hot-water cylinder and discharge through hot water pump, obtains condensed water; (3) dried material is discharged from drier outlet through blocking valve, obtains dewatered sludge; Tail gas from offgas outlet discharge enter spray scrubber carry out spraying and dedusting purification pre-cooled, the tail gas after being purified respectively, waste water, spray water; Waste water is discharged; Spray water enters in spray scrubber by recycle pump; (5) the tail gas after purification enters in condenser and cools, and obtains the tail gas after dewatering and water coolant respectively; Tail gas after dewatering enters aftertreatment systems through induced draft fan; Water coolant is discharged from water outlet and is entered condenser.The present invention is simple, stable, reliable.
Description
Technical field
The present invention relates to drying sludge technical field, particularly relate to a kind of mud steam-tube rotatory dryer drying means.
Background technology
Mud be sewage work when disposing of sewage, the pulpous state produced by mechanical dehydration or filter cake waste, water ratio is about 60% to 85%.Because source, waste water water source is wide, change of water quality is large, organic contamination substrate concentration is high and the potential of hydrogen change feature such as greatly, and the sludge components of generation is also very complicated, and subsequent disposal difficulty is very large.As printing and dyeing sludge, due to containing dyestuff, slurry, auxiliary agent etc., composition is very complicated, wherein the structure of dyestuff has nitro and the heavy metal element such as aminocompound and copper, chromium, zinc, arsenic, there is larger bio-toxicity, very strong to the pollution of environment, belong to Hazardous wastes.
The prevailing technology of current domestic sludge treatment is: mud first through mechanical dehydration, then improves calorific value by heat drying deep dehydration, then goes to burn.Mechanical sludge dewatering machine and the current relative maturity of burning process, and drying sludge existing problems are more.The mode of drying sludge is a lot, comprising blade dryer drying process, disc dryer drying process, conveyor dryer drying process and rotary kiln drying technique etc., but there is following problem in above-mentioned drying mode: (1) single device treatment capacity is little: separate unit treatment capacity is every day about 100 tons, need number of devices more during mass-producing process, the large occupation of land of equipment layout area is large; (2) dry rear dewatered sludge airborne dust is large, and cause secondary pollution, transportation problem is more; (3) system support equipment is many, complicated operation, and maintenance cost is high.Therefore, existing drying process is only applicable to process on a small scale, is not suitable for larger process.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of simple, stable, reliable mud steam-tube rotatory dryer drying means.
For solving the problem, a kind of mud steam-tube rotatory dryer drying means of the present invention, comprises the following steps:
(1) wet mud enters in described steam-tube rotatory dryer by worm conveyor from the opening for feed of steam-tube rotatory dryer; The low-pressure saturated steam of 0.2 ~ 1.0MPa enters in described steam-tube rotatory dryer from the steam inlet of described steam-tube rotatory dryer simultaneously, after drying, obtain that temperature is the water of condensation of 90 ~ 180 DEG C respectively, the dried material of water ratio≤50% and temperature are the tail gas of 90 ~ 110 DEG C;
(2) described temperature is that the water of condensation of 90 ~ 180 DEG C is discharged from the condensation-water drain of described steam-tube rotatory dryer and entered the hot-water cylinder that water temperature is 90 ~ 180 DEG C, and the hot water pump through being connected with described hot-water cylinder is discharged, and obtains the condensed water that temperature is 90 ~ 180 DEG C;
(3) the dried material of described water ratio≤50% is discharged from the drier outlet of described steam-tube rotatory dryer through blocking valve, obtains dewatered sludge;
(4) described temperature is that the tail gas of 90 ~ 110 DEG C is discharged from the offgas outlet of described steam-tube rotatory dryer and entered spray scrubber, simultaneously, temperature is that the water of 0 ~ 30 DEG C enters in described spray scrubber by pipeline, after recycle pump pressurizing atomizing, carry out spraying and dedusting purification pre-cooled, obtaining temperature is respectively tail gas, waste water, spray water after the purification of 70 ~ 90 DEG C; Described waste water is discharged through waste water transfer lime; Described spray water enters in described spray scrubber through water port by described recycle pump;
(5) described temperature is that tail gas after the purification of 70 ~ 90 DEG C enters in condenser, with the water coolant indirect contact of 0 ~ 30 DEG C, realizes cooling, and to obtain temperature be respectively tail gas after 35 ~ 40 DEG C dewatering and temperature is the water coolant of 30 ~ 35 DEG C; Described temperature is that the tail gas after 35 ~ 40 DEG C dewatering enters aftertreatment systems through induced draft fan; Described temperature is that the water coolant of 30 ~ 35 DEG C is discharged from water outlet, and enters in described condenser through circulating line.
Described step (1) in wet mud refer to that water ratio is 60 ~ 90%, grain diameter≤300mm, density are 500 ~ 3000kg/m3, temperature is 0 ~ 80 DEG C and pH value be 5.5 ~ 7.5 in pulpous state or the domestic sludge of filter cake shape and/or industrial sludge.
Described step (1) middle steam tube rotary dryer for being obliquely installed.
The present invention compared with prior art has the following advantages:
1, the steam-tube rotatory dryer treatment capacity of the present invention's employing is large, and dehumidification system equipment is few, system stability is reliable.The mud that separate unit can to process moisture about 80% every day reaches 500 tons even higher to 1000 tons.
2, the present invention wets mud while steam-tube rotatory dryer inner drying, restrains collide with drying machine, forms small-particle, forms spherical shape, make sludge-drying without airborne dust in subsequent delivery in pivotal process, convenient conveying.
3, in the present invention, mud and dried tail gas carry out in closed system, can not be leaked in surrounding environment, can not form harm to environment.
4, dried tail gas of the present invention adopts spray washing and condensation of water mode, and can guarantee that the condensed material of tail gas reduces in a large number, aftertreatment device load is low, and process is convenient.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is process flow sheet of the present invention.
In figure: 1-steam-tube rotatory dryer, 2-hot-water cylinder, 3-blocking valve, 4-spray scrubber, 5-condenser, 6-induced draft fan, 7-recycle pump, 8-hot water pump.
Embodiment
As shown in Figure 1, a kind of mud steam-tube rotatory dryer drying means, comprises the following steps:
(1) wet mud enters in steam-tube rotatory dryer 1 by worm conveyor from the opening for feed of steam-tube rotatory dryer 1; The low-pressure saturated steam of 0.2 ~ 1.0MPa enters in steam-tube rotatory dryer 1 from the steam inlet of steam-tube rotatory dryer 1 simultaneously, wet mud is by tube wall and steam indirect heat exchange, in pivotal process, wet stock is heated, while move to discharge port.After drying, obtain that temperature is the water of condensation of 90 ~ 180 DEG C respectively, the dried material of water ratio≤50% and temperature are the tail gas of 90 ~ 110 DEG C.
Wherein:
Wet mud refer to that water ratio is 60 ~ 90%, grain diameter≤300mm, density are 500 ~ 3000kg/m3, temperature is 0 ~ 80 DEG C and pH value be 5.5 ~ 7.5 in pulpous state or the domestic sludge of filter cake shape and/or industrial sludge.
Steam-tube rotatory dryer 1 for being obliquely installed, and is produced by Tianhua Institute of Chemical Machinery & Automation Co., Ltd..
(2) temperature is that the water of condensation of 90 ~ 180 DEG C is discharged from the condensation-water drain of steam-tube rotatory dryer 1 and entered the hot-water cylinder 2 that water temperature is 90 ~ 180 DEG C, and the hot water pump 8 through being connected with hot-water cylinder 2 is discharged, and obtains the condensed water that temperature is 90 ~ 180 DEG C.
(3) the dried material of water ratio≤50% is discharged from the drier outlet of steam-tube rotatory dryer 1 through blocking valve 3, obtains dewatered sludge.
(4) temperature is that the tail gas of 90 ~ 110 DEG C is discharged from the offgas outlet of steam-tube rotatory dryer 1 and entered spray scrubber 4, simultaneously, temperature is that the water of 0 ~ 30 DEG C enters in spray scrubber 4 by pipeline, after recycle pump 7 pressurizing atomizing, carry out spraying and dedusting purification pre-cooled, obtaining temperature is respectively tail gas, waste water, spray water after the purification of 70 ~ 90 DEG C; Waste water is discharged through waste water transfer lime; Spray water is entered in spray scrubber 4 by recycle pump 7 through water port.
(5) temperature is that tail gas after the purification of 70 ~ 90 DEG C enters in condenser 5, with the water coolant indirect contact of 0 ~ 30 DEG C, realizes cooling, and to obtain temperature be respectively tail gas after 35 ~ 40 DEG C dewatering and temperature is the water coolant of 30 ~ 35 DEG C; Temperature is that the tail gas after 35 ~ 40 DEG C dewatering enters aftertreatment systems through induced draft fan 6; Temperature is that the water coolant of 30 ~ 35 DEG C is discharged from water outlet, and enters in condenser 5 through circulating line.
Claims (2)
1. a mud steam-tube rotatory dryer drying means, comprises the following steps:
(1) wet mud enters in described steam-tube rotatory dryer (1) by worm conveyor from the opening for feed of steam-tube rotatory dryer (1); The low-pressure saturated steam of 0.2 ~ 1.0MPa enters in described steam-tube rotatory dryer (1) from the steam inlet of described steam-tube rotatory dryer (1) simultaneously, after drying, obtain that temperature is the water of condensation of 90 ~ 180 DEG C respectively, the dried material of water ratio≤50% and temperature are the tail gas of 90 ~ 110 DEG C; Described wet mud refer to that water ratio is 60 ~ 90%, grain diameter≤300mm, density are 500 ~ 3000kg/m3, temperature is 0 ~ 80 DEG C and pH value be 5.5 ~ 7.5 in pulpous state or the domestic sludge of filter cake shape and/or industrial sludge;
(2) described temperature is that the water of condensation of 90 ~ 180 DEG C is discharged from the condensation-water drain of described steam-tube rotatory dryer (1) and entered the hot-water cylinder (2) that water temperature is 90 ~ 180 DEG C, and the hot water pump (8) through being connected with described hot-water cylinder (2) is discharged, and obtains the condensed water that temperature is 90 ~ 180 DEG C;
(3) the dried material of described water ratio≤50% is discharged from the drier outlet of described steam-tube rotatory dryer (1) through blocking valve (3), obtains dewatered sludge;
(4) described temperature is that the tail gas of 90 ~ 110 DEG C is discharged from the offgas outlet of described steam-tube rotatory dryer (1) and entered spray scrubber (4), simultaneously, temperature is that the water of 0 ~ 30 DEG C enters in described spray scrubber (4) by pipeline, after recycle pump (7) pressurizing atomizing, carry out spraying and dedusting purification pre-cooled, obtaining temperature is respectively tail gas, waste water, spray water after the purification of 70 ~ 90 DEG C; Described waste water is discharged through waste water transfer lime; Described spray water enters in described spray scrubber (4) through water port by described recycle pump (7);
(5) described temperature is that tail gas after the purification of 70 ~ 90 DEG C enters in condenser (5), with the water coolant indirect contact of 0 ~ 30 DEG C, realizes cooling, and to obtain temperature be respectively tail gas after 35 ~ 40 DEG C dewatering and temperature is the water coolant of 30 ~ 35 DEG C; Described temperature is that the tail gas after 35 ~ 40 DEG C dewatering enters aftertreatment systems through induced draft fan (6); Described temperature is that the water coolant of 30 ~ 35 DEG C is discharged from water outlet, and enters in described condenser (5) through circulating line.
2. a kind of mud steam-tube rotatory dryer drying means as claimed in claim 1, is characterized in that: described step (1) middle steam tube rotary dryer (1) for being obliquely installed.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105084710A (en) * | 2015-09-15 | 2015-11-25 | 南京大学环境规划设计研究院有限公司 | Sludge energy-saving drying unit and sludge energy-saving drying method |
| CN107382014A (en) * | 2017-08-31 | 2017-11-24 | 上海通华不锈钢压力容器工程有限公司 | A kind of steam-type sludge drier |
| CN109809670A (en) * | 2019-04-09 | 2019-05-28 | 兰州天昊环保工程有限公司 | A kind of drying device of power plant desulfurization denitration wastewater sludge |
| CN115388638A (en) * | 2022-08-25 | 2022-11-25 | 天华化工机械及自动化研究设计院有限公司 | Wet material drying system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11137950A (en) * | 1997-09-11 | 1999-05-25 | Lindauer Dornier Gmbh | Treatment of waste gas of hot drying process and more particularly sludge drying process of sewer sludge drying device and equipment for execution this method |
| FR2862634A1 (en) * | 2003-11-24 | 2005-05-27 | Idra Environnement | Procedure for drying sludge containing waste materials uses horizontal rotary kiln with recycling of previously dried fines |
| CN103408213A (en) * | 2013-08-02 | 2013-11-27 | 天华化工机械及自动化研究设计院有限公司 | Energy-saving off-gas self-lazy circular sludge drying system and application method thereof |
| CN203382627U (en) * | 2013-08-02 | 2014-01-08 | 天华化工机械及自动化研究设计院有限公司 | Energy-saving type dyeing sludge drying system for combined heat and power generation |
| CN203653403U (en) * | 2013-12-13 | 2014-06-18 | 天华化工机械及自动化研究设计院有限公司 | Dyeing sludge drying equipment |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11137950A (en) * | 1997-09-11 | 1999-05-25 | Lindauer Dornier Gmbh | Treatment of waste gas of hot drying process and more particularly sludge drying process of sewer sludge drying device and equipment for execution this method |
| FR2862634A1 (en) * | 2003-11-24 | 2005-05-27 | Idra Environnement | Procedure for drying sludge containing waste materials uses horizontal rotary kiln with recycling of previously dried fines |
| CN103408213A (en) * | 2013-08-02 | 2013-11-27 | 天华化工机械及自动化研究设计院有限公司 | Energy-saving off-gas self-lazy circular sludge drying system and application method thereof |
| CN203382627U (en) * | 2013-08-02 | 2014-01-08 | 天华化工机械及自动化研究设计院有限公司 | Energy-saving type dyeing sludge drying system for combined heat and power generation |
| CN203653403U (en) * | 2013-12-13 | 2014-06-18 | 天华化工机械及自动化研究设计院有限公司 | Dyeing sludge drying equipment |
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