CN101294775A - Heat reclamation method for wastewater of dyeing and printing industry - Google Patents
Heat reclamation method for wastewater of dyeing and printing industry Download PDFInfo
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- CN101294775A CN101294775A CNA2008100625036A CN200810062503A CN101294775A CN 101294775 A CN101294775 A CN 101294775A CN A2008100625036 A CNA2008100625036 A CN A2008100625036A CN 200810062503 A CN200810062503 A CN 200810062503A CN 101294775 A CN101294775 A CN 101294775A
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Abstract
The invention discloses a method for recovering and utilizing heat, and particularly relates to a method of recovering and utilizing the heat of waste water in the printing industry; the invention aims to provide a method of recovering and utilizing the heat of the waste water and a secondary filtering device used in the treatment of the waste water in the printing industry, wherein the method includes making full use of the residual heat in the waste water, and has no need for frequently cleaning the heat exchange equipment with the heat utilization ratio reaching 90%; after the single stage filter, the waste hot water passes through the secondary filtering device and a flat-plate type heat exchanger: the filtered hot water is reserved in an insulating hot water tank and the exchanged waste water is disposed. The method is characterized by easy operation, quick investment recovery and so on.
Description
Technical field
The present invention relates to the method that a kind of recuperation of heat utilizes, especially relate to the method for the recuperation of heat utilization of waste water in a kind of dyeing industry.
Background technology
Energy-conservation is the maximum problem of current society, is the requirement of implement scientific view of development, also is the task of building resource-conserving and friendly environment society, is the problem that concerns the sustainable development of socio-economy overall situation.No matter be the 17th Session of the General Assembly of party or the National People's Congress that holds recently, all put on the agenda, further clearly realize the goal task and general requirement () main target of energy-saving and emission-reduction energy-conservation.By 2010, ten thousand yuan of GDP energy consumptions were dropped to below the standard coal of 1D village by 1.22 tons of standard coals in 2005, reduce about 20%; Unit industrial added value water consumption reduces by 30%.The Eleventh Five-Year Plan period, total emissions of major pollutants reduces 10%, and by 2010, SO2 emissions reduced to 2,295 ten thousand tons by 2,549 ten thousand tons in 2005, and COD (COD) reduces to 1,273 ten thousand tons by 1,414 ten thousand tons; The whole nation is established city's treatment rate of domestic sewage and is not less than 70%, and percentage of industrial solid waste that is comprehensively utilized reaches more than 60%.(2) general requirement.Follow the guidance of Deng Xiaoping Theory and the thought of Three Represents, comprehensive implement scientific view of development, accelerate to build resource-conserving, friendly environment society, energy-saving and emission-reduction as adjusting economic structure, change the breach and the important handgrip of growth pattern, important goal as macro adjustments and controls, integrated use economy, law and necessary administration means, the control increment, adjust storage, depend on science and technology, increase input, perfect the legal system, perfect policies, fulfill one's duties, strengthen supervision, strengthen propaganda, strengthen the awareness, give top priority to what is the most important, the powerful propelling, mobilize whole society's strength, carry out energy-saving and cost-reducing and pollution emission reduction work in a down-to-earth manner, guarantee to realize the restrictive index of energy-saving and emission-reduction, promote the good and fast development of economic society.Two, at present present situation and development trend, the Tongxiang is national top 100 (county) city based on the light textile industry, there is family surplus the printing and dyeing enterprise 50 whole city.Printing and dyeing enterprise need carry out destarch, boiling-off, bleaching and the refining of mercerising after washing to machining object in process of production under the temperature of 90-100 ' C, just be discharged through the hot water after the processing as waste water, the temperature of these waste water also has 70-90 ' C, accounts for Total Water 1/3rd.These also have a large amount of heat energy to be wasted in containing dye discoloration and cloth from the waste water in the dyeing process fiber, we were not when considering to reclaim heat energy in the past, always eye is seen the sewage emissions in printing and dyeing mill, along with the more and more higher requirement of environmental protection, various printing and dyeing enterprises have all been set up sewage disposal system, these contaminated hot water are cooling at leisure in treatment tank, has caused a large amount of thermal waste, has also polluted atmosphere.Mention today on the agenda simultaneously in energy-saving and cost-reducing and environmental protection, we have reason these energy that is wasted is recycled again, therefore recycle the main direction that these heat energy are these subject studies.Printing and dyeing back spent hot water-foul water tank-one-level filtration-used heat water tank-sewage disposal.
For disclosing a kind of method of waste water residual heat in the textile printing and dyeing wastewater waste-heat recovery device of " 2005200632671 ", this method is utilized between heat exchanger, hot-tub, the filtering ponds and is formed a circulation by water pump in the patent No..Because this method only realizes once filtering, convenient a large amount of fibre object and other suspension pass through the one-level filter plant to heat exchanger, just the heat exchanger waste water pipeline of flowing through uses easy incrustation of a period of time, reduce the thermal efficiency of heat exchange, remove the dirty pretty troublesome of heat exchanger inwall, not easy-clear, thereby this problem is badly in need of solving.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of waste heat that makes full use of in the waste water is provided, need not often to clean heat-exchange apparatus, heat utilization efficiency reaches method that the recuperation of heat of 90% wastewater of dyeing and printing industry utilizes and wastewater of dyeing and printing industry used cascade filtration device when handling.
The method of the recuperation of heat utilization of wastewater of dyeing and printing industry has following step successively, and standby to the heat preservation hot water tank through spent hot water's process cascade filtration device, plate-type exchanger, hot water after the one-level filtration, the waste water after the exchange is to sewage disposal; Described cascade filtration device comprises that the hollow of sealing is simplified, decelerator, motor, filter screen cleaning brush, filter screen, described simplified have water inlet and delivery port; Described motor is connected with decelerator, and described decelerator is connected by axle with the filter screen cleaning brush: described filter screen cleaning brush contacts with filter screen, and described water inlet and delivery port are isolated by described filter screen; Described filter screen is cylindric, one circle boss is arranged on the described filter screen upper port outer wall, one circle boss is arranged on the simplified inwall of hollow, the simplified boss of described filter screen boss and hollow contact and the boss of hollow cylinder below, described filter screen boss top and the simplified contacted trim ring boss of hollow, described trim ring boss is littler than filter screen boss at footpath tube width, makes filter screen can freely enter hollow cylinder; Fix a trim ring on the described trim ring boss, described trim ring radial edges surpasses filter screen boss edge.
Can also connect a backwash vapor interface on described hollow is simplified.Make and can make the filter screen non-scaling, do not stop up, heat exchange effect is stable.
Because the smooth and difficult generation fouling of plate-type exchanger described in this device, heat transfer coefficient can reach more than the 5000W/M ' .K in flat interchanger, because the heat transfer coefficient height relatively is fit to the Lowlevel thermal energy heat recovery.
Characteristics such as that the method for the recuperation of heat utilization of this wastewater of dyeing and printing industry has is simple to operate, investment back cost recovery is fast.
Description of drawings
Fig. 1 is the flow chart that waste water recuperation of heat of the present invention utilizes;
Fig. 2 is the cascade filtration device.
The specific embodiment
In a printing and dyeing mill, carried out the test of this technology, cold water heating water after spent hot water's process cascade filtration device 2 after the used heat sewage process one-level filtration 1 that printing and dyeing mill prints and dyes out in Fig. 1, Fig. 2, plate-type exchanger 3, the exchange is standby to heat preservation hot water tank 4, hot water in the attemperater has become the spent hot water again after using, the water of attemperater is delivered to printing and dyeing mill's use in 14 o'clock of printing and dyeing, and the waste water after plate-type exchanger 3 exchanges to apparatus for treating sewage 5 is handled discharging then; Cascade filtration device 2 comprises hollow cylinder 6, decelerator 7, motor 8, filter screen cleaning brush 9, the filter screen 10 of sealing, and described simplified 6 have water inlet 11 and delivery port 12; Described motor 8 is connected with decelerator 7, and described decelerator 7 and filter screen cleaning brush 9 are connected by axle 13: described filter screen cleaning brush 9 contacts with filter screen 10, and it is isolated that described water inlet 11 and delivery port 12 pass through described filter screen 10; Described filter screen 10 is cylindric, one circle boss is arranged on the described filter screen 10 upper port outer walls, one circle boss is arranged on the inwall of hollow cylinder 6, the simplified boss of described filter screen boss and hollow contact and the boss of hollow cylinder below, described filter screen boss top and the simplified contacted trim ring boss of hollow, described trim ring boss is littler than filter screen boss at footpath tube width, makes filter screen can freely enter hollow cylinder; Fix a trim ring on the described trim ring boss, described trim ring radial edges surpasses filter screen boss edge; Also connect a backwash vapor interface 15 on the described hollow simplified 6.
Enter 90 ℃ of recovery system temperature after measured, need the temperature 16 ' C of heat exchange clear water, the temperature of clear water is 80 ℃ after the heat exchange, and maximum working pressure (MWP) is 0.6Mpa.
Economic benefit:
The theoretical steam expense of saving is calculated as follows:
Computing formula: Qx 6tx1000 ÷ 600000
Q: discharge
6t: temperature difference: 80 ' C-16 ' C 2 64 ' C
1000: ' heat that C water needs is 1000 kilocalories in every intensification 1
600000: the one tons of heats that steam contains
With 5 tons of used heat sewage is example, can save quantity of steam:
Qx 6tx1000 ÷ 600,000 2 5x 64x1000 ÷ 600,000 2 0.53n village //J, sun
That is to say by, under the flow of the village of 5n per hour, ' C, it can from 16 ℃ through reaching 80 after the heat exchange for clear water
Save 0.53 ton/hour of steam,, can economize on the use of funds 130.53 2 68.90 yuan/ton with 130 yuan of calculations of present steam price per ton.
Economize on the use of funds the whole year as following table:
Saving amount/ton production time producing days steam unit price is reduced expenses and is saved the mark coal
0.53T/H 10 300 130 yuan/ton 206700
0.53T/H 15 300 130 yuan/ton 310050
0.53T/H 20 300 130 yuan/ton 413400
Therefore, the method for the recuperation of heat utilization of wastewater of dyeing and printing industry will have than great society benefit and economic benefit, and the hot water yield reaches about 90%, and use heat exchanger to need not cleaning for a long time.
Claims (4)
1, the method for a kind of recuperation of heat of wastewater of dyeing and printing industry utilization, it comprises that the spent hot water that printing and dyeing mill comes out carries out the one-level filtration earlier, again through heat exchanger, the hot water of the formation after the cold water exchange is standby to the heat preservation hot water tank, the spent hot water's discharging after the exchange; It is characterized in that: the spent hot water after filtering through one-level is through the cascade filtration device, carries out heat exchange to heat exchanger again, and described heat exchanger is a plate-type exchanger; Described cascade filtration device comprises that the hollow of sealing is simplified, decelerator, motor, filter screen cleaning brush, filter screen, described simplified have water inlet and delivery port; Described motor is connected with decelerator, and described decelerator is connected by axle with the filter screen cleaning brush: described filter screen cleaning brush contacts with filter screen, and described water inlet and delivery port are isolated by described filter screen; Described filter screen is cylindric, one circle boss is arranged on the described filter screen upper port outer wall, one circle boss is arranged on the simplified inwall of hollow, the simplified boss of described filter screen boss and hollow contact and the boss of hollow cylinder below, described filter screen boss top and the simplified contacted trim ring boss of hollow, described trim ring boss is littler than filter screen boss at footpath tube width, makes filter screen can freely enter hollow cylinder; Fix a trim ring on the described trim ring boss, described trim ring radial edges surpasses filter screen boss edge.
2, the method for the recuperation of heat of a kind of wastewater of dyeing and printing industry according to claim 1 utilization is characterized in that: also connect a backwash vapor interface on described hollow is simplified.
3, a kind of cascade filtration device is characterized in that: the hollow that comprises sealing is simplified, decelerator, motor, filter screen cleaning brush, filter screen, described simplified have water inlet and delivery port; Described motor is connected with decelerator, and described decelerator is connected by axle with the filter screen cleaning brush: described filter screen cleaning brush contacts with filter screen, and described water inlet and delivery port are isolated by described filter screen; Described filter screen is cylindric, one circle boss is arranged on the described filter screen upper port outer wall, one circle boss is arranged on the simplified inwall of hollow, the simplified boss of described filter screen boss and hollow contact and the boss of hollow cylinder below, described filter screen boss top and the simplified contacted trim ring boss of hollow, described trim ring boss is littler than filter screen boss at footpath tube width, makes filter screen can freely enter hollow cylinder; Fix a trim ring on the described trim ring boss, described trim ring radial edges surpasses filter screen boss edge.
4, a kind of cascade filtration device according to claim 3 is characterized in that: also connect a backwash vapor interface on described hollow is simplified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008100625036A CN101294775B (en) | 2008-06-13 | 2008-06-13 | Heat reclamation method for wastewater of dyeing and printing industry |
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| CN2008100625036A CN101294775B (en) | 2008-06-13 | 2008-06-13 | Heat reclamation method for wastewater of dyeing and printing industry |
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| CN101294775A true CN101294775A (en) | 2008-10-29 |
| CN101294775B CN101294775B (en) | 2010-06-23 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672542B (en) * | 2009-06-04 | 2012-02-01 | 浙江美欣达印染集团股份有限公司 | Recovery processing method and recovery processing device of heat energy |
| CN102880209A (en) * | 2012-09-10 | 2013-01-16 | 福建众和股份有限公司 | Automatic control system for water flow |
| CN104998505A (en) * | 2015-07-30 | 2015-10-28 | 江苏倪家巷集团精毛纺织有限公司 | Waste heat utilization system for dyeing and finishing workshop smoke purification devices |
| CN109268800A (en) * | 2018-08-17 | 2019-01-25 | 常州大学 | A kind of solar energy-natural gas combined heat steam colo(u)r printing and electricity generation system |
| CN109708495A (en) * | 2018-12-24 | 2019-05-03 | 吉祥三宝高科纺织有限公司 | Hot waste water waste-heat recovery device during textile dyeing final finishing |
| CN111735327A (en) * | 2020-06-29 | 2020-10-02 | 顾艳波 | Fluid heat exchange equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2183804Y (en) * | 1993-10-16 | 1994-11-30 | 祝发文 | Combined waste water purifier |
| CN2481394Y (en) * | 2001-04-26 | 2002-03-13 | 李延东 | Rotary cleanable filter |
| CN2814305Y (en) * | 2005-08-23 | 2006-09-06 | 广州赛唯热工设备有限公司 | Textile dyeing waste water residual heat recovering apparatus |
-
2008
- 2008-06-13 CN CN2008100625036A patent/CN101294775B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672542B (en) * | 2009-06-04 | 2012-02-01 | 浙江美欣达印染集团股份有限公司 | Recovery processing method and recovery processing device of heat energy |
| CN102880209A (en) * | 2012-09-10 | 2013-01-16 | 福建众和股份有限公司 | Automatic control system for water flow |
| CN102880209B (en) * | 2012-09-10 | 2015-05-13 | 福建众和股份有限公司 | Automatic control system for water flow |
| CN104998505A (en) * | 2015-07-30 | 2015-10-28 | 江苏倪家巷集团精毛纺织有限公司 | Waste heat utilization system for dyeing and finishing workshop smoke purification devices |
| CN109268800A (en) * | 2018-08-17 | 2019-01-25 | 常州大学 | A kind of solar energy-natural gas combined heat steam colo(u)r printing and electricity generation system |
| CN109708495A (en) * | 2018-12-24 | 2019-05-03 | 吉祥三宝高科纺织有限公司 | Hot waste water waste-heat recovery device during textile dyeing final finishing |
| CN111735327A (en) * | 2020-06-29 | 2020-10-02 | 顾艳波 | Fluid heat exchange equipment |
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| Publication number | Publication date |
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| CN101294775B (en) | 2010-06-23 |
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