CN105731570A - Working method of distillation and heat recovery system for treating paper mill wastewater - Google Patents
Working method of distillation and heat recovery system for treating paper mill wastewater Download PDFInfo
- Publication number
- CN105731570A CN105731570A CN201610315648.7A CN201610315648A CN105731570A CN 105731570 A CN105731570 A CN 105731570A CN 201610315648 A CN201610315648 A CN 201610315648A CN 105731570 A CN105731570 A CN 105731570A
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- distillation column
- material filling
- filling type
- condenser
- type distillation
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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
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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
The invention provides a working method of a distillation and heat recovery system for treating paper mill wastewater. The system comprises a wastewater pool, packed distillation towers, a plate distillation tower and a condenser, wherein each packed distillation tower is provided with a water inlet pipeline communicated with the wastewater pool; a top air outlet of each packed distillation tower is connected to the condenser by a steam pipeline; a bottom liquid outlet of each packed distillation tower is connected to the plate distillation tower by a liquid pipeline; a top air outlet of the plate distillation tower is connected to the condenser by the steam pipeline; a bottom liquid outlet of the plate distillation tower is connected to a water supply system of a workshop; the hot air exhausted by the condenser is delivered to a heat exchanger; the hot air of the heat exchanger is connected to air inlets of the plate distillation tower and the packed distillation towers by air pipelines; the water exhausted by the condenser is delivered to a workshop of industrial water. The system can simultaneously achieve separation and respective recycling of papermaking fibers and papermaking additives in papermaking wastewater and can also recover the heat energy in the wastewater treatment process, thus avoiding waste of water and the heat energy.
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 especially 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, and a large amount of polluted sources are discharged in traditional paper mill, all can produce to pollute to water quality and soil, also have and 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 not 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.
Through retrieval, inventor finds that the patent No. is 2009100012690, the patent of invention that patent name is the processing method of paper waste discloses by filtration, sand setting, flocculation sediment, and the pulping wastewater treatment method of separating and recovering step, its inventive point is in that before flocculant is added into and carries out flocculation sediment in pending middle water, the flocculant accounting for total consumption 70 90% weight is carried out desalting processing, achieve the goal the paper waste being to divide content with relatively low one-tenth present treatment high salt, 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 suitable in the process of the paper waste of relative broad range.
It is 2009100012703 that inventor also retrieves one section of patent No., 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 in that to use QA2O process to process technology generations for conventional biochemical processing method, reach to save cost, 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 comparatively pure water.
Summary of the invention
In order to solve above-mentioned Problems existing, the invention discloses the method for work of 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 contaminated environment, and can allow moisture again with, allow the water to recycle, meet environmental protection concept, be also making full use of water resource, it is to avoid water resource waste simultaneously；Heat recovery system disclosed by the invention is used to the heat reclaimed after waste water of paper mill evaporates in steam, 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.Described method of work 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 material filling type distillation column and the steam given off of plate tower.
The hot-air that described condenser is discharged is transported to heat exchanger, is connected to plate tower and the air inlet of material filling type distillation column by gas pipeline through the hot-air of described heat exchanger；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.
The inlet channel of said two material filling type distillation column is provided with a three-way valve, 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, any one in the inlet channel of described waste pipe and said two material filling type distillation column connected by described three-way valve, 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.
Distillation process and the distillation of waste water are processed the system that the heat energy recycle in processing procedure integrally combines by the present invention, it is not only and decreases environmental pollution, also realize recycling of water and the recycling of heat energy simultaneously, 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, contaminated 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 drawings and specific embodiments, 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 restriction 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 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 unpleasant gases affect ambient air come out in waste water simultaneously.Because the subsequent treatment of waste water is all carry out in hot environment, keeps the heat energy that waste water self contains can improve the thermal energy consumption of subsequent treatment, improve 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 filler stops，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 not 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 simultaneously and be directly discharged in environment to cause water to pollute or soil pollution.
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 the condenser 4 recuperation of heat to material filling type distillation column 2 and the steam given off of plate tower 3, it is to avoid substantial amounts of thermal waste.From the water that condenser 4 outlet is discharged, be also the water containing certain heat energy, it is possible to be transported to workshop, 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 that this three-way valve regulates the in running order material filling type evaporating column 2 of 10 adjustments 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 is transported to the allotment region work additive for paper making allotment use of additive for paper making.
The steam discharged from the gas outlet at material filling type distillation column 2 and plate tower 3 top transmits respectively through jet chimney 6, 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 11 of one-level, the other end connecting tee pipe 13 of the total jet chimney 11 of this one-level, 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 one to connect with the total jet chimney 11 of one-level, 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, when there being material filling type distillation column 2 work, 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 method for work of the distillation processing waste water of paper mill and 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, is connected to plate tower (3) and the air inlet of material filling type distillation column (2) by gas pipeline through the hot-air of described heat exchanger；The water that condenser (4) is discharged is transported to water for industrial use workshop；
Described material filling type distillation column (2) has two, and the inlet of said two material filling type distillation column (2) is respectively arranged with the inlet channel (5) connected with wastewater disposal basin (1)；
The inlet channel (5) of said two material filling type distillation column (2) is provided with a three-way valve (10, 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), described waste pipe (7) connected by described three-way valve (10)；
nullDescribed method of work includes: 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 material filling type distillation column (2) and the steam given off of plate tower (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610315648.7A CN105731570A (en) | 2014-10-24 | 2014-10-24 | Working method of distillation and heat recovery system for treating paper mill wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610315648.7A CN105731570A (en) | 2014-10-24 | 2014-10-24 | Working method of distillation and heat recovery system for treating paper mill wastewater |
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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| CN105731570A true CN105731570A (en) | 2016-07-06 |
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| CN201610315648.7A Pending CN105731570A (en) | 2014-10-24 | 2014-10-24 | Working method of distillation and heat recovery system for treating paper mill wastewater |
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Citations (4)
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|---|---|---|---|---|
| JP2005046657A (en) * | 2003-07-29 | 2005-02-24 | Hitachi Plant Eng & Constr Co Ltd | Wastewater treatment method |
| CN101811743A (en) * | 2010-04-09 | 2010-08-25 | 兰州节能环保工程有限责任公司 | Circulation evaporator |
| CN203244811U (en) * | 2013-04-17 | 2013-10-23 | 浙江大学 | Device for resourceful treatment of steel hydrochloric acid pickle liquor |
| CN203741071U (en) * | 2014-01-17 | 2014-07-30 | 北京万邦达环保技术股份有限公司 | Evaporation concentration equipment |
-
2014
- 2014-10-24 CN CN201610315648.7A patent/CN105731570A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005046657A (en) * | 2003-07-29 | 2005-02-24 | Hitachi Plant Eng & Constr Co Ltd | Wastewater treatment method |
| CN101811743A (en) * | 2010-04-09 | 2010-08-25 | 兰州节能环保工程有限责任公司 | Circulation evaporator |
| CN203244811U (en) * | 2013-04-17 | 2013-10-23 | 浙江大学 | Device for resourceful treatment of steel hydrochloric acid pickle liquor |
| CN203741071U (en) * | 2014-01-17 | 2014-07-30 | 北京万邦达环保技术股份有限公司 | Evaporation concentration equipment |
Non-Patent Citations (1)
| Title |
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| 王兵等: "《常减压蒸馏装置操作指南》", 30 April 2006, 中国石化出版社 * |
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Application publication date: 20160706 |