CN106241961A - A kind of water treatment facilities utilizing residual heat of electric power plant and method - Google Patents
A kind of water treatment facilities utilizing residual heat of electric power plant and method Download PDFInfo
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- CN106241961A CN106241961A CN201610804956.6A CN201610804956A CN106241961A CN 106241961 A CN106241961 A CN 106241961A CN 201610804956 A CN201610804956 A CN 201610804956A CN 106241961 A CN106241961 A CN 106241961A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 118
- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 59
- 239000012528 membrane Substances 0.000 claims abstract description 35
- 230000006835 compression Effects 0.000 claims abstract description 34
- 238000007906 compression Methods 0.000 claims abstract description 34
- 238000004821 distillation Methods 0.000 claims abstract description 32
- 230000008569 process Effects 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000002510 pyrogen Substances 0.000 claims abstract description 4
- 239000000498 cooling water Substances 0.000 claims description 25
- 238000012806 monitoring device Methods 0.000 claims description 24
- 238000012545 processing Methods 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- 238000006392 deoxygenation reaction Methods 0.000 claims description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 description 15
- 239000013535 sea water Substances 0.000 description 10
- 238000006477 desulfuration reaction Methods 0.000 description 8
- 230000023556 desulfurization Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000010908 plant waste Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/447—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by membrane distillation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- 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
- C02F2103/08—Seawater, e.g. for desalination
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
Landscapes
- 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)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to a kind of water treatment facilities utilizing residual heat of electric power plant and method.Utilize the water treatment facilities of residual heat of electric power plant, including: heating bath, for adding pyrogen water, being provided with heat exchanger in described heating bath, described heating bath is externally provided with exhaust steam pipeline A, and described exhaust steam pipeline A is sequentially provided with air pump and vapour compression machine, wherein, exhaust steam enters vapour compression machine through air pump, and the gas outlet of described vapour compression machine is connected with the air inlet of heat exchanger, and the gas outlet of described heat exchanger connects boiler；Distillation device, its hot side solution end water inlet connects the outlet of heating bath, and its hot side solution brings out the mouth of a river and connects the water inlet B of heating bath through water pump, and the condensed device of steam outlet of distillation device connects product pond.The present invention can be greatly reduced the operating cost that Membrane Materials processes simultaneously with effectively save water resource and the recovery energy, can produce high-quality water, improve the efficiency of utilization of whole power plant.
Description
Technical field
The invention belongs to energy-conserving and environment-protective field, be specifically related to a kind of water treatment facilities utilizing residual heat of electric power plant and method.
Background technology
Coal fired power generation occupies critical role in China's energy resource supply.In order to ensure the normal of generating efficiency and generating equipment
Run, it usually needs exhaust steam in steam turbine is cooled down by substantial amounts of recirculated cooling water, by the volatilization of water by the heat in exhaust steam
Bringing in air, this not only wastes substantial amounts of heat, consumes the water resource of up to ten thousand tons simultaneously every day, therefore, how to recycle
Heat in exhaust steam, always energy-saving field priority research areas.
Membrane Materials (MD) technology is a kind of efficient membrane separation technique, is by controlling wastewater temperature, with hydrophobic micropore
Film is separating medium, with film both sides steam pressure difference as mass transfer force, it is achieved the process that Waste water concentrating and pure water reclaim, MD technology
Compared with conventional film isolation technics, there is many merits, as salt is retained ultrahigh in efficiency, to most nonvolatile matters
Have nearly 100% and retain efficiency, and influent quality is required low, operating condition is gentle (need not high pressure equipment), run dimension
Protect conveniently, fouling membrane is less likely to occur and the evaporation of observable index tradition is low etc..Additionally, salinity change in waste water is adapted to by Membrane Materials
Property strong, as long as solute unsaturation separates out in theory, distillation device can be properly functioning.Owing to Membrane Materials needs to enter former water
Row heating, therefore energy consumption is of a relatively high, and this is also one of key factor limiting MD technique large-scale application.
Therefore, even avoiding using in a large number recirculated water to reduce, reclaim the energy simultaneously, the efficient heat energy of exploiting economy returns
Skill of knocking off is significant.
Summary of the invention
For solving the problems referred to above, it is an object of the invention to provide a kind of water treatment facilities utilizing residual heat of electric power plant and side
Method.Residual heat of electric power plant is utilized and combines with membrane distillation technique by the present invention, while completing membrane distillation water processing procedure, and fully profit
With exhaust steam residual heat, save the energy and recirculated water consumption.
It is an object of the invention to be achieved through the following technical solutions:
A kind of water treatment facilities utilizing residual heat of electric power plant, including:
Heating bath, is used for adding pyrogen water, is provided with heat exchanger in described heating bath, and described heating bath is externally provided with exhaust steam pipeline A,
Being sequentially provided with air pump and vapour compression machine on described exhaust steam pipeline A, wherein, exhaust steam enters vapour compression machine through air pump, institute
The air inlet of the gas outlet and heat exchanger of stating vapour compression machine is connected, and the gas outlet of described heat exchanger connects boiler；
Distillation device, its hot side solution end water inlet connects the outlet of heating bath, and its hot side solution brings out mouth of a river warp
Water pump connects the water inlet B of heating bath, and the condensed device of steam outlet of distillation device connects product pond.
Further, the described water treatment facilities utilizing residual heat of electric power plant also includes pretreatment unit, for carrying out former water
Pretreatment, the outlet of described pretreatment unit connects the water inlet A of described heating bath, described pretreatment unit be sedimentation tank,
The combination of one or more of oil interceptor, oxidation pond, softening pond, filter or biochemistry pool.
Further, described vapour compression machine is single-stage vapor compression machine or uses multi-stage vapor compression machine series operation.
Further, it is additionally provided with agitating device in described heating bath.
Further, the described water treatment facilities utilizing residual heat of electric power plant also includes exhaust steam pipeline B, on described exhaust steam pipeline B
Being provided with condenser, exhaust steam enters boiler through described condenser, and in described condenser, exhaust steam and recirculated cooling water take countercurrent flow.
Further, described exhaust steam pipeline A is provided with flow monitoring device A, described flow monitoring device A and is located at air pump
And between vapour compression machine；
The recirculated cooling water water inlet end of described condenser is provided with flow monitoring device B；
It is provided with pressure monitoring device in described condenser；
Described flow monitoring device A, flow monitoring device B and pressure monitoring device are all connected with PLC self-con-tained unit.
Further, described distillation device uses the vacuum membrane distillation method of operation, it is possible to use GAP TYPE, gas sweep formula,
The combination of one or more in the direct contact membrane distillation method of operation.
Utilize, based on described water treatment facilities, the method that residual heat of electric power plant carries out water process, comprise the following steps:
Step 1, enters heating bath after the preprocessed device pretreatment of former water；
Step 2, the exhaust steam temperature that turbine low pressure cylinder is discharged is 30～50 DEG C, and exhaust steam enters after air pump is extracted out steams
Vapour compressor；
Step 3, the exhaust steam after vapour compression machine compresses is warming up to after 50～90 DEG C enter the heat exchanger in heating bath, logical
Crossing heat exchanger to heat the former water in heating bath, exhaust steam simultaneously condenses, and after exhaust steam condensation, the condensed water of generation is heated removes
Oxygen returns in boiler after processing；
Step 4, the former water in heating bath is heated to 50～90 DEG C, and former water enters Membrane Materials dress under the swabbing action of water pump
Put and carry out concentration, use this kind of suction-type water intake mode, advantageously reduce the seawater pressure in membrane module, it is to avoid hydrophobic membrane
Penetrate, film both sides steam pressure difference can be increased under equal operating condition simultaneously, be conducive to improving the permeant flux of film.Warp
Crossing the former water after membrane distillation concentration to be back in heating bath under the swabbing action of water pump again, repeat concentration process, film steams
The condensed device of water vapour that distillation unit produces enters product pond and is collected.
Further, according to water-quality constituents and the process operating mode of handled former water, when the former water salinity in heating bath reaches
During to discharge value, the former water in heating bath is discharged, repeats above-mentioned concentration process.
Further, the pretreatment in step 1 be chemistry sink to the bottom, chemical oxidation, the one carrying out a biological disposal upon, filter or adsorb
Or it is several.
Further, when distillation device processes water shortage by Membrane Materials, the exhaust steam that turbine low pressure cylinder is discharged
It is partly into condenser to be condensed by recirculated cooling water.Along with Membrane Materials processes being gradually increased of the water yield, recirculated cooling water is used
Amount is gradually reduced；When the Membrane Materials process water yield is sufficiently large, can cancel the operation of recirculated cooling water, the circulation in condenser is cold
But water system is as emergency power system.
Further, by PLC self-con-tained unit to the recirculated cooling water flow of inlet water in condenser, the pressure in condenser
The extraction flow entering vapour compression machine with exhaust steam coordinates control.
Further, in step 4, under the effect of vacuum pump, the water vapour that distillation device produces discharges membrane module warp
Condenser enters product pond and is collected.
The present invention is applicable to various types of fired power generating unit, preferably water chiller.
The invention have the benefit that
Present invention exhaust steam of power plant being pressurizeed is the thermal source as Membrane Materials system, through treatment for reuse to pot after exhaust steam condensation
Stove, Membrane Materials system can carry out desalinization or process waste water etc., it is adaptable to processes the pure water such as waste water and desalinization and produces
Or solution desalting processing.Additionally, the present invention arranges the prison online such as circulating cooling water flow, condenser vacuum and exhaust steam rate of air sucked in required
Survey and control system, to guarantee electricity generation system safety and to realize the thermal efficiency maximization of whole system.The method can effectively drop
Low circulating cooling evaporated quantity of water, it is to avoid major part heat is volatized into air with recirculated cooling water, can utilize more than exhaust steam simultaneously
Heat carries out waste water process or produces the water resource of high-quality.The present invention can be the biggest with effectively save water resource and the recovery energy
Width reduces the operating cost that Membrane Materials processes, and can produce high-quality water, improve the efficiency of utilization of whole power plant.
Accompanying drawing explanation
Fig. 1 is the water treatment facilities structural representation utilizing residual heat of electric power plant of the present invention；
Wherein, 1-pretreatment unit, 2-heating bath, 3-condenser, 4-air pump, 5-vapour compression machine, 6-heat exchanger, 7-
Boiler, 8-distillation device, 9-water pump, 10-condenser, 11-produces pond, 12-vacuum pump, and 13-flow monitoring device A, 14-flow
Amount monitoring device B, 15-pressure monitoring device, 16-PLC self-con-tained unit.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, not
For limiting the present invention.
As it is shown in figure 1, a kind of water treatment facilities utilizing residual heat of electric power plant, including:
Pretreatment unit 1, for former water carries out pretreatment, the outlet of described pretreatment unit connects described heating bath
The water inlet A of 1, described pretreatment unit 1 is sedimentation tank, oil interceptor, oxidation pond, softening pond, filter or the one of biochemistry pool
Or several combinations.
Heating bath 2, is used for adding pyrogen water, is provided with heat exchanger 6 and agitating device, outside described heating bath 2 in described heating bath 2
Being provided with exhaust steam pipeline A, described exhaust steam pipeline A is sequentially provided with air pump 4 and vapour compression machine 5, wherein, exhaust steam is through air pump 4
Entering vapour compression machine 5, the gas outlet of described vapour compression machine 5 is connected with the air inlet of heat exchanger 6, going out of described heat exchanger 6
QI KOU connects boiler 7；Described vapour compression machine 5 is single-stage vapor compression machine or uses multi-stage vapor compression machine series operation.
Being additionally provided with exhaust steam pipeline B, described exhaust steam pipeline B outside described heating bath 2 and be provided with condenser 3, exhaust steam is through described solidifying
Vapour device 3 enters boiler, and in described condenser 3, exhaust steam and recirculated cooling water take countercurrent flow.
Distillation device 8, its hot side solution end water inlet connects the outlet of heating bath 2, and its hot side solution brings out the mouth of a river
Connect the water inlet B of heating bath 2 through water pump 9, the steam outlet condensed device 10 of distillation device 8 connects product pond 11.
Described exhaust steam pipeline A is provided with flow monitoring device A13, described flow monitoring device A13 and is located at air pump 4 and steams
Between vapour compressor 5；The recirculated cooling water water inlet end of described condenser 3 is provided with flow monitoring device B14；In described condenser 3
It is provided with pressure monitoring device 15；Described flow monitoring device A13, flow monitoring device B14 and pressure monitoring device 15 are all connected with
PLC self-con-tained unit 16.
Embodiment 1
The method that residual heat of electric power plant carries out water process is utilized, with certain Desulphurization for Coal-fired Power Plant waste water based on described water treatment facilities
For processing object, comprise the following steps:
Step 1, desulfurization wastewater, through chemical precipitation, softening, flocculation precipitation pretreatment, removes heavy metal in waste water, suspension
The pollutant such as thing and hardness, enter heating bath 2；
Step 2, in the exhaust steam that turbine low pressure cylinder is discharged, exhaust steam enters vapour compression machine 5 after air pump 4 is extracted out；
Step 3, the exhaust steam after vapour compression machine 5 compresses is warming up to after 90 DEG C enter the heat exchanger 6 in heating bath 2, logical
Crossing heat exchanger 6 to heat the desulfurization wastewater in heating bath 2, exhaust steam simultaneously condenses, the condensed water warp produced after exhaust steam condensation
Return in boiler 7 after crossing backheat and deoxygenation process；
By PLC self-con-tained unit 16 to the recirculated cooling water flow of inlet water in condenser 3, the pressure in condenser 3 and weary
Vapour enters the extraction flow of vapour compression machine 5 and coordinates control, it is ensured that the vacuum in condenser is in zone of reasonableness, it is to avoid
Affect upstream generating efficiency.
Step 4, the desulfurization wastewater in heating bath 2 is heated to 80 DEG C, and under the swabbing action of water pump, desulfurization wastewater enters film
Distilling apparatus 8, the desulfurization wastewater after membrane distillation concentration is back in heating bath 2, and Repeat-heating and membrane distillation concentration process.
Under the effect of vacuum pump 12, the water vapour that desulfurization wastewater produces in distillation device 8 is discharged membrane module and enters condenser
10, condensed water enters product pond 11 and is collected and is back in power plant's production.
Step 5, when the desulfurization wastewater salinity in heating bath 2 reaches 18%, discharges the desulfurization wastewater in heating bath 2, weight
Multiple above-mentioned concentration process.
When distillation device 8 processes water shortage by Membrane Materials, the exhaust steam part that turbine low pressure cylinder is discharged is entered
Enter condenser 3 to be condensed by recirculated cooling water.
Along with Membrane Materials processes being gradually increased of the water yield, circulating cooling water consumption is gradually reduced；When Membrane Materials processes the water yield
Time sufficiently large, can cancel the operation of recirculated cooling water, the recirculating cooling water system in condenser is as emergency power system.
Embodiment 2
The method that residual heat of electric power plant carries out water process is utilized, with the sea of certain coastal coal-burning power plant based on described water treatment facilities
Water, for processing object, carries out desalination process, comprises the following steps sea water:
Step 1, first pumps into regulating reservoir by sea water, is then passed through the pretreatment such as softening, flocculation sediment, filtration, removes useless
The pollutant such as float and hardness in water, enter heating bath 2；
Step 2, in the exhaust steam that turbine low pressure cylinder is discharged, exhaust steam enters vapour compression machine 5 after air pump 4 is extracted out；
Step 3, the exhaust steam after vapour compression machine 5 compresses is warming up to after 65 DEG C enter the heat exchanger 6 in heating bath 2, logical
Crossing heat exchanger 6 to heat the sea water in heating bath 2, exhaust steam simultaneously condenses, and the condensed water produced after exhaust steam condensation passes through back
Heat and deoxygenation return in boiler 7 after processing；
By PLC self-con-tained unit 16 to the recirculated cooling water flow of inlet water in condenser 3, the pressure in condenser 3 and weary
Vapour enters the extraction flow of vapour compression machine 5 and coordinates control, it is ensured that the vacuum in condenser is in zone of reasonableness, it is to avoid
Affect upstream generating efficiency.
Step 4, the heating of seawater in heating bath 2 to 60 DEG C, under the swabbing action of water pump, sea water enters distillation device
8, the sea water after membrane distillation concentration is back in heating bath 2, and Repeat-heating and membrane distillation concentration process.At vacuum pump 12
Under effect, the water vapour that sea water produces in distillation device 8 is discharged membrane module and enters condenser 10, and condensed water enters and produces water
Pond 11 is collected and is back to power plant's production, resident living.
Step 5, when the sea water salinity in heating bath 2 reaches 20%, discharges the sea water in heating bath 2, repeats above-mentioned dense
Contracting processing procedure.
When distillation device 8 processes water shortage by Membrane Materials, the exhaust steam part that turbine low pressure cylinder is discharged is entered
Enter condenser 3 to be condensed by recirculated cooling water.
Along with Membrane Materials processes being gradually increased of the water yield, circulating cooling water consumption is gradually reduced；When Membrane Materials processes the water yield
Time sufficiently large, can cancel the operation of recirculated cooling water, the recirculating cooling water system in condenser is as emergency power system.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. the water treatment facilities utilizing residual heat of electric power plant, it is characterised in that including:
Heating bath (2), is used for adding pyrogen water, is provided with heat exchanger (6) in described heating bath (2), and described heating bath (2) is externally provided with weary
Vapor pipeline A, described exhaust steam pipeline A is sequentially provided with air pump (4) and vapour compression machine (5), and wherein, exhaust steam is through air pump (4)
Entering vapour compression machine (5), the gas outlet of described vapour compression machine (5) is connected with the air inlet of heat exchanger (6), described heat exchanger
(6) gas outlet connects boiler (7)；
Distillation device (8), its hot side solution end water inlet connects the outlet of heating bath (2), and its hot side solution brings out the mouth of a river
Connect the water inlet B of heating bath (2) through water pump (9), the condensed device of the steam outlet (10) of distillation device (8) connects product water
Pond (11).
The water treatment facilities utilizing residual heat of electric power plant the most according to claim 1, it is characterised in that also include pretreatment unit
(1), for former water carries out pretreatment, the outlet of described pretreatment unit connects the water inlet A of described heating bath (1), institute
State the group of one or more that pretreatment unit (1) is sedimentation tank, oil interceptor, oxidation pond, softening pond, filter or biochemistry pool
Close.
The water treatment facilities utilizing residual heat of electric power plant the most according to claim 1, it is characterised in that described vapour compression machine
(5) it is single-stage vapor compression machine or employing multi-stage vapor compression machine series operation.
The water treatment facilities utilizing residual heat of electric power plant the most according to claim 1, it is characterised in that in described heating bath (2)
It is additionally provided with agitating device.
The water treatment facilities utilizing residual heat of electric power plant the most according to claim 1, it is characterised in that also include exhaust steam pipeline B,
Described exhaust steam pipeline B is provided with condenser (3), and exhaust steam enters boiler, exhaust steam in described condenser (3) through described condenser (3)
Countercurrent flow is taked with recirculated cooling water.
The water treatment facilities utilizing residual heat of electric power plant the most according to claim 5, it is characterised in that
Described exhaust steam pipeline A is provided with flow monitoring device A (13), described flow monitoring device A (13) be located at air pump (4) and
Between vapour compression machine (5)；
The recirculated cooling water water inlet end of described condenser (3) is provided with flow monitoring device B (14)；
Pressure monitoring device (15) it is provided with in described condenser (3)；
Described flow monitoring device A (13), flow monitoring device B (14) and pressure monitoring device (15) are all connected with PLC automatic control dress
Put (16).
7. utilizing, based on the water treatment facilities described in any of the above-described claim, the method that residual heat of electric power plant carries out water process, it is special
Levy and be, comprise the following steps:
Step 1, enters heating bath (2) after preprocessed device (1) pretreatment of former water；
Step 2, the exhaust steam temperature that turbine low pressure cylinder is discharged is 30～50 DEG C, and exhaust steam enters after air pump (4) is extracted out steams
Vapour compressor (5)；
Step 3, the exhaust steam after vapour compression machine (5) compresses is warming up to after 50～90 DEG C enter the heat exchanger in heating bath (2)
(6), being heated the former water in heating bath (2) by heat exchanger (6), exhaust steam simultaneously condenses, and produce after exhaust steam condensation is cold
The solidifying heated deoxygenation of water returns in boiler (7) after processing；
Step 4, the former water in heating bath (2) is heated to 50～90 DEG C, and former water enters distillation device (8) and carries out concentration,
Former water after membrane distillation concentration is back in heating bath (2), repeats concentration process, and distillation device (8) produces
The condensed device of water vapour (10) enters product pond (11) and is collected.
The method utilizing residual heat of electric power plant to carry out water process the most according to claim 7, it is characterised in that according to handled former
The water-quality constituents of water and process operating mode, when the former water salinity in heating bath reaches discharge value, arrange the former water in heating bath
Go out, repeat above-mentioned concentration process.
The method utilizing residual heat of electric power plant to carry out water process the most according to claim 7, it is characterised in that work as distillation device
(8), when processing water shortage by Membrane Materials, the exhaust steam that turbine low pressure cylinder is discharged is partly into condenser (3) by circulation
Cooling water condensation.
The method utilizing residual heat of electric power plant to carry out water process the most according to claim 7, it is characterised in that by PLC automatic control
Device (16) enters both vapor compression to the pressure in the recirculated cooling water flow of inlet water in condenser (3), condenser (3) and exhaust steam
The extraction flow of machine (5) coordinates control.
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| CN201610804956.6A CN106241961A (en) | 2016-09-06 | 2016-09-06 | A kind of water treatment facilities utilizing residual heat of electric power plant and method |
| PCT/CN2017/072018 WO2018045707A1 (en) | 2016-09-06 | 2017-01-22 | Water treatment device and method using waste heat from power plant |
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| CN201610804956.6A CN106241961A (en) | 2016-09-06 | 2016-09-06 | A kind of water treatment facilities utilizing residual heat of electric power plant and method |
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