CN105753240A - Novel zero discharge treatment technology for high salinity wastewater of thermal power plant - Google Patents

Novel zero discharge treatment technology for high salinity wastewater of thermal power plant Download PDF

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Publication number
CN105753240A
CN105753240A CN201610276621.1A CN201610276621A CN105753240A CN 105753240 A CN105753240 A CN 105753240A CN 201610276621 A CN201610276621 A CN 201610276621A CN 105753240 A CN105753240 A CN 105753240A
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CN
China
Prior art keywords
water
power plant
treatment
thermal power
zero discharge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610276621.1A
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Chinese (zh)
Inventor
王启栋
赵保华
韩征飞
祝燕云
陈洁薇
胡俊强
张继锋
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Huadian Zhengzhou Machinery Design and Research Institute Co Ltd
Original Assignee
Huadian Zhengzhou Machinery Design and Research Institute Co Ltd
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Application filed by Huadian Zhengzhou Machinery Design and Research Institute Co Ltd filed Critical Huadian Zhengzhou Machinery Design and Research Institute Co Ltd
Priority to CN201610276621.1A priority Critical patent/CN105753240A/en
Publication of CN105753240A publication Critical patent/CN105753240A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048Purification of waste water by evaporation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F2001/5218Crystallization

Abstract

The invention relates to the technical field of thermal power plant energy and resource recycling and energy conversation and environmental protection, in particular to a novel zero discharge treatment technology for high salinity wastewater of a thermal power plant.According to the technology, by mixing desulfurization wastewater, residue water and circulating cooling sewage water, the floor area of a treatment unit is saved, the acid-base input amount in the treatment process is decreased, the salt concentration of the desulfurization wastewater and the residue water is decreased, and therefore the operation load and treatment cost of a subsequent treatment device are reduced; the water can be reused in a segmented mode to increase the overall reuse rate of reused water and reduce the operation cost according to the treatment characteristics of the combined technology by combining the water using requirements of different workshops in the production process of the power plant.By combining a crystallization and microfiltration device, a disk-tube reverse osmosis device and a mechanical steam recompression device, the high salinity wastewater and the circulating cooling sewage water of the power plant can be completely converted into resources, and true zero discharge is finally achieved.

Description

A kind of thermal power plant high slat-containing wastewater zero discharge treatment new technology
Technical field
The present invention relates to thermal power plant's energy, resource recycling, energy-conserving and environment-protective technical field, particularly relate to a kind of thermal power plant high slat-containing wastewater zero discharge treatment new technology.
Background technology
Pulp water and the desulfurization wastewater salinity of power plant emission are higher, and its total dissolved solidss (TDS) are generally up to 20000mg/L, containing heavy metal ion such as Hg, Pb, Cr, Ni, easily cause fouling and have certain corrosivity, particularly desulfurization wastewater, its Cl-At concentrations up to several ten thousand ppm, the corrosion of metal pipe material is more serious, therefore add difficulty and the operating cost of wastewater treatment.Current most of power plant high slat-containing wastewater is only directly outer after simple process to be arranged.
Circulating cooling supplements the consumption of water and accounts for the 80% of whole power plant water amount, and corresponding cooling sewer still suffers from bigger discharge capacity after being rationally back to production, accounts for outside power plant about the 90% of displacement.The salinity relatively desulfurization wastewater of cooling sewer is low, and water quality is relatively better, and directly discharge causes water resource waste.
Increasingly stringent along with environmental protection policy, the renovation technique of " ultra-clean discharge " is widelyd popularize at whole nation thermal power industry, it is increasingly serious that the appearance of simultaneous " ten, water " and water resource utilize, " zero-emission " of following Thermal Power Generation Industry waste water is also extremely urgent, high slat-containing wastewater stands in the breach as the most intractable waste water of power plant, and the Industrial Recirculating Cooling Water as " displacement rich and influential family " is also the most important thing that " zero-emission " processes object, therefore seek scientific and reasonable " zero-emission " and process technique, realize the resource of all kinds of waste water, it will be the task of top priority of Future Power Plant wastewater treatment.
Summary of the invention
The technical problem to be solved in the present invention is: the Industrial Recirculating Cooling Water discharge capacity of thermal power plant is relatively big, causes the waste of water resource, for solving the problems referred to above, it is provided that a kind of thermal power plant high slat-containing wastewater zero discharge treatment new technology.
It is an object of the invention to realize in the following manner:
A kind of thermal power plant high slat-containing wastewater zero discharge treatment new technology, comprises the following steps:
1) desulfurization wastewater, pulp water and the Industrial Recirculating Cooling Water that, produce are sufficiently mixed at collecting-tank, hereafter reacted pond, after crystallization micro-filtration, produce water and enter next stage treatment process, mud is by after sludge concentration tank and sludge filter press, obtain mud cake and filtrate, filtrate is back to reaction tank, and mud cake is transported outward;
2), step 1) in a product water part can be back to slagging-off moisturizing and coal works dust suppression etc., remainder is by after disc tube reverse osmosis (dt-ro) device, producing Water circulation in Boiler water Feeding System system, and dense water enters next stage treatment process;
3), step 2) in produce dense water after function of mechanical steam recompression device evaporative crystallization, carry out solid-liquid separation, obtain high temperature pure water and crystal salt, pure water is back to boiler feedwater, crystal salt transport outward.
In the dense water that described disc tube reverse osmosis (dt-ro) device produces, the water yield of 30% 50% is back to the water inlet pipe of disc tube reverse osmosis (dt-ro) device.
Relative to prior art, the present invention is by carrying out mixed processing by desulfurization wastewater, pulp water and Industrial Recirculating Cooling Water, save the floor space of processing unit, decrease the dosage of soda acid in processing procedure, reduce the salinity of desulfurization wastewater and pulp water, thus reducing operating load and the handling use of aftertreatment device, processing feature according to group technology also uses water requirement in conjunction with workshops different in power plant's production process, water quality can be carried out segmentation reuse, to improve the overall reclamation rate of recycle-water, reduce operating cost simultaneously.By crystallization micro-filtration, disc tube reverse osmosis (dt-ro) device and function of mechanical steam recompression device being combined, by whole to power plant's high slat-containing wastewater and Industrial Recirculating Cooling Water resources, can finally realize real zero-emission.
Accompanying drawing explanation
Fig. 1 is present invention process flow chart.
Wherein, 1 is collecting-tank;2 is reaction tank;3 is crystallization micro-filtration;4 is sludge concentration tank;5 is sludge filter press;6 is disc tube reverse osmosis (dt-ro) device;7 is function of mechanical steam recompression device.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail, as shown in Figure 1.
The present invention provides a kind of thermal power plant high slat-containing wastewater zero discharge treatment new technology, comprises the following steps:
1) characteristic of desulfurization wastewater, pulp water and three strands of waste water self of Industrial Recirculating Cooling Water, is utilized: pulp water is that acidity, Industrial Recirculating Cooling Water are in alkalescence in alkaline, desulfurization wastewater, and the Industrial Recirculating Cooling Water water yield is bigger, therefore at the mixed waste water of collecting-tank 1 in alkalescence, be conducive to the precipitation of heavy metal, greatly reduce the dosage of alkali in preprocessing process.
2) after, waste water enters reaction tank 2, by adding a small amount of alkali liquor and coagulant, most of heavy metal ion is made to form the hydroxide of indissoluble, and under flocculation, form bigger alumen ustum with the float in waste water, and entering crystallization micro-filtration 3, the mud of generation, after sludge concentration tank 4 and sludge filter press 5, obtains mud cake and filtrate, filtrate is back to reaction tank, and mud cake is transported outward.
3), crystallization micro-filtration 3 utilizes big passage micro-filtration membrane to realize mud-water separation, the pore size filter of film can reach 0.2 μm, effluent quality is better, can realize under the assosting effect of medicament useless water correction, to ensure follow-up desalting processing, this technology need not arrange backwash simultaneously, therefore can reduce the discharge capacity of waste water, the water outlet of this device can be back to as required Slag-water system moisturizing or and coal works spray dust suppression etc..
4), the water outlet after the filtration of crystallized micro-filtration 3 enters into and carries out concentration in disc tube reverse osmosis (dt-ro) device 6.Disc tube reverse osmosis (dt-ro) film is other membrane modules relatively, have the advantage such as channel width, short, the turbulent flow row of flow process, are therefore not easily blocked, and long service life, it is easy to clean.The product Water circulation obtained is in boiler feed water system, the concentrate recirculation of 30% 50% is to device water inlet, to obtain higher producing water ratio, in actual production, the concentrate recirculation of optional 30%, 32%, 35%, 38%, 40%, 41%, 42%, 44%, 45%, 47%, 49%, 50% is to device water inlet.Remain dense water and enter the process of next stage.
5), in step 4), the dense water entrance function of mechanical steam recompression device 7 of higher concentration processes.Function of mechanical steam recompression system only need to pass into a secondary steam, and the indirect steam that hereafter utilisation system produces is circulated use, saves the energy and low in energy consumption, simultaneously material wide accommodation.It is back to plant area after the highly purified steam condensation obtained, arranges outside crystal salt.

Claims (2)

1. thermal power plant's high slat-containing wastewater zero discharge treatment new technology, it is characterised in that comprise the following steps:
1) desulfurization wastewater, pulp water and the Industrial Recirculating Cooling Water that, produce are sufficiently mixed at collecting-tank (1), hereafter reacted pond (2), after crystallization micro-filtration (3), produce water and enter next stage treatment process, mud is by after sludge concentration tank (4) and sludge filter press (5), obtain mud cake and filtrate, filtrate is back to reaction tank (2), and mud cake is transported outward;
2), step 1) in a product water part can be back to slagging-off moisturizing and coal works dust suppression etc., remainder is by after disc tube reverse osmosis (dt-ro) device (6), producing Water circulation in Boiler water Feeding System system, and dense water enters next stage treatment process;
3), step 2) in produce dense water after function of mechanical steam recompression device (7) evaporative crystallization, carry out solid-liquid separation, obtain high temperature pure water and crystal salt, pure water is back to boiler feedwater, crystal salt transport outward.
2. a kind of thermal power plant according to claim 1 high slat-containing wastewater zero discharge treatment new technology, it is characterised in that: in the dense water that disc tube reverse osmosis (dt-ro) device (6) produces, the water yield of 30% 50% is back to the water inlet pipe of disc tube reverse osmosis (dt-ro) device (6).
CN201610276621.1A 2016-04-29 2016-04-29 Novel zero discharge treatment technology for high salinity wastewater of thermal power plant Pending CN105753240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610276621.1A CN105753240A (en) 2016-04-29 2016-04-29 Novel zero discharge treatment technology for high salinity wastewater of thermal power plant

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Application Number Priority Date Filing Date Title
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CN105753240A true CN105753240A (en) 2016-07-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106045169A (en) * 2016-07-15 2016-10-26 中国环境科学研究院 Treatment system and method for realizing flue gas desulfurization wastewater zero discharge of coal-fired power plant
CN106145498A (en) * 2016-08-23 2016-11-23 华电郑州机械设计研究院有限公司 A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method
CN106430780A (en) * 2016-11-02 2017-02-22 华润电力(菏泽)有限公司 Heat-engine plant wastewater treatment method and system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101891330A (en) * 2010-07-23 2010-11-24 深圳市能源环保有限公司 Waste water treatment system and method for power plant
CN202185199U (en) * 2011-05-04 2012-04-11 徐州海吉亚生物制品有限公司 Crystallization microfilter
CN202542972U (en) * 2012-03-02 2012-11-21 天壕节能科技股份有限公司 Zero discharge system for waste water
US20130199918A1 (en) * 2012-02-07 2013-08-08 Coyte R. Jones Treating waste streams with organic content
CN203486995U (en) * 2013-08-23 2014-03-19 中机国能电力工程有限公司 Waste water treatment system for thermal power plant
CN105254106A (en) * 2015-11-11 2016-01-20 中国华电工程(集团)有限公司 High-salt waste water zero emission and salt separation processing method and device
CN105254066A (en) * 2015-10-23 2016-01-20 华电电力科学研究院 Treatment device and method capable of achieving waste water zero discharge of power plant with large water volume
CN105293805A (en) * 2015-11-11 2016-02-03 光大环保技术研究院(深圳)有限公司 High-salinity high-hardness waste water zero-discharge processing apparatus and method thereof
CN105481157A (en) * 2015-12-18 2016-04-13 王辛平 Method for zero emission treatment of desulfurization waste water based on flue gas waste heat evaporation

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101891330A (en) * 2010-07-23 2010-11-24 深圳市能源环保有限公司 Waste water treatment system and method for power plant
CN202185199U (en) * 2011-05-04 2012-04-11 徐州海吉亚生物制品有限公司 Crystallization microfilter
US20130199918A1 (en) * 2012-02-07 2013-08-08 Coyte R. Jones Treating waste streams with organic content
CN202542972U (en) * 2012-03-02 2012-11-21 天壕节能科技股份有限公司 Zero discharge system for waste water
CN203486995U (en) * 2013-08-23 2014-03-19 中机国能电力工程有限公司 Waste water treatment system for thermal power plant
CN105254066A (en) * 2015-10-23 2016-01-20 华电电力科学研究院 Treatment device and method capable of achieving waste water zero discharge of power plant with large water volume
CN105254106A (en) * 2015-11-11 2016-01-20 中国华电工程(集团)有限公司 High-salt waste water zero emission and salt separation processing method and device
CN105293805A (en) * 2015-11-11 2016-02-03 光大环保技术研究院(深圳)有限公司 High-salinity high-hardness waste water zero-discharge processing apparatus and method thereof
CN105481157A (en) * 2015-12-18 2016-04-13 王辛平 Method for zero emission treatment of desulfurization waste water based on flue gas waste heat evaporation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李孟等主编: "《水质工程学》", 30 April 2012 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106045169A (en) * 2016-07-15 2016-10-26 中国环境科学研究院 Treatment system and method for realizing flue gas desulfurization wastewater zero discharge of coal-fired power plant
CN106145498A (en) * 2016-08-23 2016-11-23 华电郑州机械设计研究院有限公司 A kind of thermal power plant high slat-containing wastewater zero-emission recovery and treatment method
CN106430780A (en) * 2016-11-02 2017-02-22 华润电力(菏泽)有限公司 Heat-engine plant wastewater treatment method and system

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Application publication date: 20160713