CN105819528A - Paper mill wastewater distillation and heat recovery system for recycling papermaking additives - Google Patents
Paper mill wastewater distillation and heat recovery system for recycling papermaking additives Download PDFInfo
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- CN105819528A CN105819528A CN201610319213.XA CN201610319213A CN105819528A CN 105819528 A CN105819528 A CN 105819528A CN 201610319213 A CN201610319213 A CN 201610319213A CN 105819528 A CN105819528 A CN 105819528A
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- type distillation
- distillation column
- material filling
- condenser
- filling type
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- 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
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
-
- 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
- C02F2303/10—Energy recovery
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A paper mill wastewater distillation and heat recovery system for recycling papermaking additives comprises a wastewater pond, padding type distillation columns, a plate-type distillation column and a condenser. The padding type distillation columns are provided with inlet water pipelines communicated with the wastewater pond, gas outlets in the top ends of the padding type distillation columns are connected to the condenser through steam pipelines, liquid outlets in the bottom ends of the padding type distillation columns are connected to the plate type distillation column through liquid pipelines, a gas outlet in the top end of the plate-type distillation column is connected to the condenser through a steam pipeline, and a liquid outlet in the bottom end of the plate-type distillation column is connected to a workshop water supply system. Hot air exhausted by the condenser is conveyed to a heat exchanger, and hot air passing through the heat exchanger is connected to a gas inlet of the plate type distillation column and gas inlets of the padding type distillation columns through gas pipelines. Water discharged out of the condenser is conveyed to an industrial water workshop. The paper mill wastewater distillation and heat recovery system can separate, recover and use papermaking fiber and the papermaking additives in papermaking wastewater at the same time and can recycle heat energy in the wastewater treatment process, and water waste and heat energy waste are avoided.
Description
Technical field
The present invention relates to a kind of distillation processing waste water of paper mill and heat recovery system, relate to field of industrial waste water treatment, and industrial heat energy reclaims field of Environment Protection.
Background technology
Water is Source of life, and global water shortage problem is increasingly severe, and using water wisely is advocated always, as by the commercial production industry of water rich and influential family, more should carry out the reduction of discharging of water for industrial use, improve the cyclic utilization rate of water, it is to avoid the waste of water for industrial use.
Meanwhile, problem of environmental pollution is also on the rise, and boosts environmental awareness, reduce pollutant, the discharge of the most industrial pollutant, is one of major reason causing environmental pollution, and the discharge how processing industrial pollution source becomes the important measures reducing environmental pollution.
Paper industry is the industry that a polluted source discharge is serious, and paper-making process needs to use substantial amounts of water, traditional paper mill to discharge a large amount of polluted sources, water quality and soil all can be produced pollution, also produce substantial amounts of niff.The waste water of paper mill discharge remains in the paper-making fibre in waste water containing in paper-making process, causes loss and the waste of paper-making fibre；Possibly together with additive for paper making in the waste water in paper mill, most additive for paper making is the most volatilizable, can remain in soil or sewage, and discharge can cause the pollution that cannot eliminate for a long time in the environment.
Paper industry is also an industry needing to consume a large amount of heat energy, containing heat energy in paper waste, directly discharges the problem that there is also thermal waste.
Inventor finds Patent No. 2009100012690 through retrieval, patent name is that the patent of invention of the processing method of paper waste discloses by filtration, sand setting, flocculation sediment, and the pulping wastewater treatment method of separating and recovering step, before its inventive point is to carry out flocculation sediment in flocculant interpolation to pending middle water, the flocculant accounting for total consumption 70 90% weight is carried out desalting processing, achieving the goal is that the present treatment high salt that becomes with relatively low divides the paper waste of content, and can reach gratifying result.The distillation being not involved with sewage processes, and day is asked in the recuperation of heat that distillation processes, in commercial Application, narrow and small according to there is application, it is impossible to be applicable to the process of the paper waste of relative broad range.
Inventor also retrieves a Patent No. 2009100012703, patent name is the patent of invention of the processing method of paper waste, which disclose utilization filtration, flocculation sediment, QA2O process, and advanced treating, the inventive point of this patent is to use QA2O process to process technology generations for conventional biochemical processing method, reach cost-effective, high treating effect, the simple beneficial effect of technique.But such technique needs to use substantial amounts of chemical agent, in residual waste water after treatment, and the not minimizing front with process of the water yield of the waste water after process, it is a kind of method that can not efficiently separate out the purest water.
Summary of the invention
For the problem solving above-mentioned existence, the invention discloses a kind of distillation processing waste water of paper mill and heat recovery system, the moisture of waste water of paper mill is evaporated by the Distallation systm of the present invention by multistage distillation method, clean water can be efficiently separated out, it is to avoid direct discharging of waste water pollute environment, and can allow moisture again with, allow the water to recycle, meet environmental protection concept, be also that water resource is made full use of, it is to avoid water resource waste simultaneously；Heat recovery system disclosed by the invention is used to reclaim the heat in steam after waste water of paper mill evaporates, it is to avoid thermal waste.
A kind of distillation processing waste water of paper mill and heat recovery system, including wastewater disposal basin, material filling type distillation column, plate tower and condenser, it is characterized in that described material filling type distillation column is provided with the inlet channel connected with wastewater disposal basin, the gas outlet, top of described material filling type distillation column is connected to condenser by jet chimney, the bottom liquid outlet of described material filling type distillation column is connected to the inlet of plate tower by fluid pipeline, the gas outlet, top of plate tower is connected to condenser by jet chimney, the bottom liquid outlet of described plate tower is connected to the water system in workshop.The method of work of described distillation and heat recovery system includes: a large amount of steam discharged from the gas outlet, top of material filling type distillation column and plate tower are transported to condenser by steam pipe, steam is condensed into water in condenser 4, discharge substantial amounts of heat simultaneously, in condenser, normal air is inputted by the gas feed of condenser, the hot-air containing heat can be discharged from the gas outlet of condenser, hot-air is transported to heat exchanger, hot-air realizes heat exchange in a heat exchanger, reach the high-temperature hot air needed for the evaporation conditions of material filling type distillation column and plate tower, it is then delivered to the air inlet of material filling type distillation column and plate tower, it is transported in material filling type distillation column and plate tower, waste water is distilled by material filling type distillation column and plate tower.By the condenser recuperation of heat to the steam that material filling type distillation column and plate tower give off.
The hot-air that described condenser is discharged is transported to heat exchanger, and the hot-air through described heat exchanger is connected to plate tower and the air inlet of material filling type distillation column by gas pipeline；The water that condenser is discharged, is transported to water for industrial use workshop.
Described material filling type distillation column has two, and the inlet of said two material filling type distillation column is respectively arranged with the inlet channel connected with wastewater disposal basin.
A three-way valve it is provided with on the inlet channel of said two material filling type distillation column, two ports of described three-way valve connect with the inlet channel of said two material filling type distillation column, piece waste pipe being connected to wastewater disposal basin of another port connection of described three-way valve, waste pipe described in the connection of described three-way valve and any one in the inlet channel of said two material filling type distillation column, or cut off described waste pipe and the inlet channel of said two material filling type distillation column simultaneously.
The fluid pipeline that the bottom liquid outlet of said two material filling type distillation column connects is connected with the two ends of a three-way valve simultaneously, the other end of this three-way valve is provided with the input duct being communicated to plate tower inlet, any one in the fluid pipeline that the input duct of this three-way valve connection plate tower is connected respectively with the bottom liquid outlet of said two material filling type distillation column, or the fluid pipeline that the bottom liquid outlet of the input duct and said two material filling type distillation column simultaneously cutting off described plate tower is connected respectively.
The top jet chimney of said two material filling type distillation column is connected to the two ends of a total jet chimney of one-level by a three-way valve, and the other end of the total jet chimney of described one-level connects the jet chimney from plate tower and the jet chimney being connected to condenser respectively by tee T.
The present invention is that distillation process and the distillation of waste water are processed the system that the heat energy recycle in processing procedure integrally combines, it is not only and decreases environmental pollution, the most also realize recycling of water, and the recycling of heat energy, avoid the waste of industrial heat energy, be the sewage disposal system of an environmental protection.
Waste water from paper machine room is carried out multistage distillation by material filling type distillation column and plate tower by the present invention, the paper-making fibre in waste water can be isolated, by the additive for paper making concentration and recovery in waste water, preparation technology for additive for paper making, not only by waste water again with, and the fiber in waste water and additive for paper making can be recycled, also save the waste of resource, it is to avoid paper waste arbitrarily discharges, pollutes environment.
Accompanying drawing explanation
Fig. 1 is the connection status schematic diagram of the present invention,
Reference numerals list: 1 wastewater disposal basin, 2 material filling type distillation column, 3 plate towers, 4 condensers, 5 inlet channels, 6 jet chimneys, 7 waste pipes, 8 fluid pipelines, 9 input duct, 10 three-way valve, the 11 total jet chimneys of one-level, 12 water pumps, 13 tee Ts.
Detailed description of the invention
Below in conjunction with the accompanying drawings and detailed description of the invention, it is further elucidated with the present invention.It should be understood that following detailed description of the invention is merely to illustrate the present invention rather than limits the scope of the present invention.
Accompanying drawing enters a specific embodiment as the present invention, and Fig. 1 is the connection status schematic diagram of the present invention, as seen from the figure, and the equipment connecting relation that the waste water distillation of the present invention processes, and processing of waste water flow to and heat energy is in the flow direction of each equipment room.Wastewater disposal basin 1 holds the waste water that commercial paper length emits, be commercial paper waste water deposit pond temporarily, wastewater disposal basin 1 can be in the sagging formula pond for scraping out on the ground, it can also be the pond being concealed in underground completely, the former cost of manufacture is simple, the latter easily by laying the function that insulation material realizes being incubated at four walls in pond, bottom and top, it is to avoid the thermal waste in waste water, also can be effectively prevented the air around the unpleasant gases affect come out in waste water simultaneously.Because the subsequent treatment of waste water is all to carry out in hot environment, the heat energy keeping waste water self to contain can improve the thermal energy consumption of subsequent treatment, improves treatment effect.
Waste water in wastewater disposal basin 1 is connected with three-way valve 10 through waste pipe 7, two water sides of three-way valve 10 respectively be connected to two material filling type distillation column 2 inlet channels 5 and be connected, water pump 12 on waste pipe 7 provides power that the waste water pump in wastewater disposal basin 1 is delivered in two material filling type distillation column 2, and three-way valve 10 can regulate the connection that waste pipe 7 can only be connected respectively in the inlet channel 5 of two material filling type distillation column 2 with two.nullWaste water enters in tower from the inlet of the side wall upper part of material filling type distillation column 2，Waste water flows through from top to down，Through filler，And with the hot-air convection inputted from material filling type distillation column 2 lower sidewall，Waste water is after hot-air，Absorption heat energy evaporates，Form steam and enter jet chimney from the gas outlet at material filling type distillation column 2 top，Owing to paper waste containing substantial amounts of paper-making fibre，Through filler，Paper-making fibre can rest on filler，Also the paper-making fibre contained the waste water that liquid outlet is discharged bottom material filling type distillation column 2 is made to reduce，When changing another material filling type distillation column 2 and distilling，The material filling type distillation column 2 of a large amount of paper-making fibre can be had to carry out water flushing by stopping on filler，Rinse with clean water，Obtain the clean water containing paper-making fibre，Such water can be used to be transported to slip house，It is used for allocating paper pulp，Paper-making fibre is re-introduced in paper pulp，Avoid the paper-making fibre in waste water to follow waste water to be discharged，Reduce the waste of paper-making fibre，Resource makes full use of.
Paper-making fibre in the waste water of material filling type distillation column 2 decreases, but the amount containing additive for paper making does not reduce from the waste water that material filling type distillation column 2 liquid outlet is discharged, the chemical agent that additive for paper making is the most volatilizable solubility of the overwhelming majority, from the liquid outlet of material filling type distillation column 2 discharge through single distilled water, again it is transported to plate tower 3, in plate tower 3, moisture evaporates in a large number, the water that liquid outlet is discharged bottom plate tower 3 contains the dense of additive for paper making, the medicament allotment region of paper machine room can be transported to, it is used as the water of medicament allotment, it also avoid additive for paper making to be directly discharged in environment cause water to pollute or soil pollution simultaneously.
The a large amount of steam discharged from the gas outlet, top of material filling type distillation column 2 and plate tower 3 are transported to condenser 4 by steam pipe, steam is condensed into water in condenser 4, discharge substantial amounts of heat simultaneously, in condenser 4, normal air is inputted by the gas feed of condenser 4, the hot-air containing heat can be discharged from the gas outlet of condenser 4, hot-air is transported to heat exchanger, hot-air realizes heat exchange in a heat exchanger, reach the high-temperature hot air needed for the evaporation conditions of material filling type distillation column 2 and plate tower 3, it is then delivered to material filling type distillation column 2 and the air inlet of plate tower 3, it is transported in material filling type distillation column 2 and plate tower 3, waste water is distilled by material filling type distillation column 2 and plate tower 3.By condenser 4 to material filling type distillation column 2 and the recuperation of heat of the steam given off of plate tower 3, it is to avoid substantial amounts of thermal waste.The water discharged from condenser 4 outlet, is also the water containing certain heat energy, can be transported to workshop, and hot-water supply system or Water heating system use, not only achieve water again with, also achieve making full use of of heat energy.
The fluid pipeline 8 that the bottom liquid outlet of two material filling type distillation column 2 connects is connected with the two ends of a three-way valve 10 simultaneously, the other end of this three-way valve 10 is provided with the input duct 9 being communicated to plate tower 3 inlet, any one in the fluid pipeline 8 that the bottom liquid outlet of input duct 9 and said two material filling type distillation column 2 that this three-way valve 10 connects plate tower 3 is connected respectively, or the fluid pipeline 8 that the bottom liquid outlet of the input duct 9 and said two material filling type distillation column 2 simultaneously cutting off described plate tower 3 is connected respectively.The fluid pipeline 8 of the bottom connection of the material filling type evaporating column 2 that this three-way valve regulation 10 regulation is in running order connects with the input duct 9 of plate tower 3.
The water that the liquid outlet of bottom is discharged from plate tower 3 is the hot water containing heat energy, is transported to after the hot-water heating system in workshop absorbed heat energy again, then the allotment region work additive for paper making allotment being transported to additive for paper making uses.
The steam discharged from the gas outlet at material filling type distillation column 2 and plate tower 3 top is transmitted by jet chimney 6 respectively, these two jet chimneys 6 are simultaneously connected to two ports of a three-way valve 10, another port of this three-way valve 10 connects a total jet chimney of one-level 11, the other end connecting tee pipe 13 of the total jet chimney of this one-level 11, two other port of this tee T 13 connects the jet chimney 6 from plate tower 3 and the jet chimney 6 being transported to condenser 4.This three-way valve 10 can regulate these two jet chimneys 6 can only have a jet chimney 11 total with one-level to connect, it is corresponding with the work relationship of two material filling type distillation column 2 that this connects relation, this three-way valve 10 controls the total jet chimney of one-level 11 and just connects in running order material filling type distillation column 2, just produce steam in running order material filling type distillation column 2, having material filling type distillation column 2 to work when, plate tower 3 is also at duty, the steam that they produce is delivered concurrently into a jet chimney 6 being connected to condenser 4 by tee T 13, it is delivered simultaneously to condenser 4.
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned technological means, also includes the technical scheme being made up of above technical characteristic combination in any.
Claims (1)
1. the distillation processing waste water of paper mill and the method for work of heat recovery system, this system includes: wastewater disposal basin (1), material filling type distillation column (2), plate tower (3) and condenser (4), it is characterized in that described material filling type distillation column (2) is provided with the inlet channel (5) connected with wastewater disposal basin (1), the gas outlet, top of described material filling type distillation column (2) is connected to condenser (4) by jet chimney (6), the bottom liquid outlet of described material filling type distillation column (2) is connected to the inlet of plate tower (3) by fluid pipeline (8), the gas outlet, top of plate tower (3) is connected to condenser (4) by jet chimney (6), the bottom liquid outlet of described plate tower (3) is connected to the water system in workshop；
The hot-air that described condenser (4) is discharged is transported to heat exchanger, and the hot-air through described heat exchanger is connected to plate tower (3) and the air inlet of material filling type distillation column (2) by gas pipeline；The water that condenser (4) is discharged is transported to water for industrial use workshop；
It is provided with a three-way valve (10 on the inlet channel (5) of said two material filling type distillation column (2), two ports of described three-way valve (10) connect with the inlet channel (5) of said two material filling type distillation column (2), piece waste pipe (7) being connected to wastewater disposal basin (1) of another port connection of described three-way valve (10), the inlet channel (5) of said two material filling type distillation column (2) connected by described three-way valve (10), cuts off the inlet channel (5) of described waste pipe (7) and said two material filling type distillation column (2) simultaneously；
The top jet chimney (6) of said two material filling type distillation column (2) is connected to the two ends of the total jet chimney of an one-level (11) by a three-way valve (10), and the other end of the total jet chimney of described one-level (11) is connected the jet chimney (6) from plate tower (3) respectively by tee T (13) and is connected to the jet chimney (6) of condenser (4)；
nullDescribed method of work，Including: a large amount of steam discharged from the gas outlet, top of material filling type distillation column (2) and plate tower (3) are transported to condenser (4) by steam pipe，Steam is condensed into water in condenser 4，Discharge substantial amounts of heat simultaneously，In condenser (4), normal air is inputted by the gas feed of condenser (4)，The hot-air containing heat can be discharged from the gas outlet of condenser (4)，Hot-air is transported to heat exchanger，Hot-air realizes heat exchange in a heat exchanger，Reach the high-temperature hot air needed for the evaporation conditions of material filling type distillation column (2) and plate tower (3)，It is then delivered to material filling type distillation column (2) and the air inlet of plate tower (3)，It is transported in material filling type distillation column (2) and plate tower (3)，Waste water is distilled by material filling type distillation column (2) and plate tower (3)；By the condenser (4) recuperation of heat to the steam that material filling type distillation column (2) and plate tower (3) give off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610319213.XA CN105819528A (en) | 2014-10-24 | 2014-10-24 | Paper mill wastewater distillation and heat recovery system for recycling papermaking additives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610319213.XA CN105819528A (en) | 2014-10-24 | 2014-10-24 | Paper mill wastewater distillation and heat recovery system for recycling papermaking additives |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410570437.9A Division CN104355342B (en) | 2014-10-24 | 2014-10-24 | A kind of distillation processing waste water of paper mill and heat recovery system |
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| Publication Number | Publication Date |
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| CN105819528A true CN105819528A (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610319213.XA Pending CN105819528A (en) | 2014-10-24 | 2014-10-24 | Paper mill wastewater distillation and heat recovery system for recycling papermaking additives |
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| CN203269605U (en) * | 2013-05-22 | 2013-11-06 | 北京万邦达环保技术股份有限公司 | Evaporation system |
| CN203577339U (en) * | 2013-11-11 | 2014-05-07 | 广州汉泰环境技术有限公司 | Mechanical vapor recompression type evaporation and concentration device |
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| WO1995014640A1 (en) * | 1993-11-23 | 1995-06-01 | Park, Yong, Hee | Vaporizing and concentration drying apparatus and method |
| JP2001276808A (en) * | 2000-03-31 | 2001-10-09 | Onodera Kozaburo | Process for separating water, and water separator for the same |
| CN201864591U (en) * | 2010-11-29 | 2011-06-15 | 昆明理工大学 | Low-pressure water-saving efficient water distiller |
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Application publication date: 20160803 |