CN206108988U - Utilize water treatment facilities of power plant's waste heat - Google Patents

Utilize water treatment facilities of power plant's waste heat Download PDF

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Publication number
CN206108988U
CN206108988U CN201621039767.6U CN201621039767U CN206108988U CN 206108988 U CN206108988 U CN 206108988U CN 201621039767 U CN201621039767 U CN 201621039767U CN 206108988 U CN206108988 U CN 206108988U
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water
heating bath
exhaust steam
power plant
treatment facilities
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CN201621039767.6U
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刘海洋
夏怀祥
江澄宇
齐勇
郭清温
郭永红
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Datang Environment Industry Group Co Ltd
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Datang Environment Industry Group Co Ltd
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Abstract

The utility model relates to an utilize water treatment facilities of power plant's waste heat. Utilize water treatment facilities of power plant's waste heat includes: heating bath for the heating raw water, be equipped with the heat exchanger in the heating bath, heating bath is equipped with exhaust steam pipeline A outward, be equipped with aspiration pump and vapor compressor on the exhaust steam pipeline A in proper order, wherein, the exhaust steam gets into vapor compressor through the aspiration pump, vapor compressor's gas outlet is connected with the air inlet of heat exchanger, the boiler is connected to the gas outlet of heat exchanger, membrane distillation unit, its heat side solution end water inlet connect delivery port of heating bath, and heating bath's water inlet B is connected through the water pump to its heat side solution end delivery port, and membrane distillation unit's vapor outlet connects production pond through the condenser. The utility model discloses effectively the water economy resource and the recovery energy reduce the running cost that the membrane distillation was handled simultaneously by a wide margin, can produce high -quality water, improve the heat utilization efficiency of whole power plant.

Description

A kind of water treatment facilities of utilization residual heat of electric power plant
Technical field
The utility model belongs to energy-conserving and environment-protective field, and in particular to a kind of water treatment facilities of utilization residual heat of electric power plant.
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 Operation, it usually needs substantial amounts of recirculated cooling water is cooled down to exhaust steam in steam turbine, by the volatilization of water by the heat in exhaust steam In bringing air into, this not only wastes substantial amounts of heat, while up to ten thousand tons of water resource is consumed daily, 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, realizes the process that Waste water concentrating and pure water are reclaimed, MD technologies With many merits compared with traditional membrane separation technique, such as to the retention ultrahigh in efficiency of salt, to most nonvolatile matters With nearly 100% retention efficiency, and low, operating condition gentle (not needing high-tension apparatus), operation dimension are required influent quality Shield is convenient, fouling membrane is less likely to occur and observable index tradition evaporation is low.Additionally, Membrane Materials are adapted to salt content change in waste water Property it is strong, separate out as long as in theory solute is unsaturated, distillation device can normally run.Because Membrane Materials need to enter raw water Row heating, therefore energy consumption is of a relatively high, this is also one of key factor of restriction MD technique large-scale applications.
Therefore, in order to reduce or even avoid to use recirculated water in a large number, while reclaiming the energy, the efficient heat energy of exploiting economy is returned Skill of knocking off is significant.
Utility model content
To solve the above problems, the purpose of this utility model is to provide a kind of water treatment facilities of utilization residual heat of electric power plant. The utility model utilizes residual heat of electric power plant in combination with membrane distillation technique, while membrane distillation water processing procedure is completed, fully Using exhaust steam residual heat, energy saving and circulation water consumption.
The purpose of this utility model is achieved through the following technical solutions:
A kind of water treatment facilities of utilization residual heat of electric power plant, including:
Heating bath, for heating raw water, is provided with heat exchanger in the heating bath, the heating bath is externally provided with exhaust steam pipeline A, Aspiration pump and vapour compression machine are sequentially provided with the exhaust steam pipeline A, wherein, exhaust steam Jing aspiration pumps enter vapour compression machine, institute State the gas outlet of vapour compression machine to be connected with the air inlet of heat exchanger, the gas outlet connection boiler of the heat exchanger;
Distillation device, its hot side solution end water inlet connects the delivery port of heating bath, and its hot side solution brings out mouth of a river Jing Water pump connects the water inlet B of heating bath, and is produced from pond in the condensed device connection of steam outlet of distillation device.
Further, the water treatment facilities of the utilization residual heat of electric power plant also includes pretreatment unit, for carrying out to raw water Pretreatment, the delivery port of the pretreatment unit connects the water inlet A of the heating bath, the pretreatment unit be sedimentation basin, Oil interceptor, oxidation pond, the combination of one or more for softening pond, filter or biochemistry pool.
Further, the vapour compression machine is for single-stage vapor compression machine or using multi-stage vapor compression machine series operation.
Further, it is additionally provided with agitating device in the heating bath.
Further, the water treatment facilities of the utilization residual heat of electric power plant also includes exhaust steam pipeline B, on the exhaust steam pipeline B Condenser is provided with, condenser described in exhaust steam Jing enters boiler, exhaust steam in the condenser takes countercurrent flow with recirculated cooling water.
Further, the exhaust steam pipeline A is provided with flow monitoring device A, and the flow monitoring device A is located at aspiration pump And vapour compression machine between;
The recirculated cooling water water inlet end of the condenser is provided with flow monitoring device B;
Pressure monitoring device is provided with the condenser;
The flow monitoring device A, flow monitoring device B and pressure monitoring device are all connected with PLC self-con-tained units.
The utility model is applied to various types of fired power generating units, preferably water chiller.
The beneficial effects of the utility model are:
Using the thermal source that power plant's pressurization exhaust steam is as Membrane Materials system, Jing treatment for reuse is arrived the utility model after exhaust steam condensation Boiler, Membrane Materials system can carry out desalinization or process waste water etc., it is adaptable to process the life of the pure water such as waste water and desalinization Produce or solution desalting processing.Additionally, the utility model arranges circulating cooling water flow, condenser vacuum and exhaust steam rate of air sucked in required etc. On-line monitoring and control system, to guarantee electricity generation system safety and realize that the thermal efficiency of whole system is maximized.The device can be with Effectively reduce circulating cooling evaporated quantity of water, it is to avoid most of heat is volatized into air with recirculated cooling water, while can utilize Exhaust steam residual heat carries out the water resource of wastewater treatment or production high-quality.The utility model can be with effectively save water resource and recovery energy Source, while the operating cost of Membrane Materials process is greatly reduced, can produce high-quality water, improve the heat utilization effect of whole power plant Rate.
Description of the drawings
Fig. 1 is the water treatment facilities structural representation of utilization residual heat of electric power plant described in the utility model;
Wherein, 1- pretreatment units, 2- heating baths, 3- condensers, 4- aspiration pumps, 5- vapour compression machines, 6- heat exchangers, 7- Boiler, 8- distillation devices, 9- water pumps, 10- condensers, 11- produces pond, 12- vavuum pumps, 13- flow monitoring device A, 14- stream Amount monitoring device B, 15- pressure monitoring devices, 16-PLC self-con-tained units.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only to explain this Utility model, is not used to limit the utility model.
As shown in figure 1, a kind of water treatment facilities of utilization residual heat of electric power plant, including:
Pretreatment unit 1, for pre-processing to raw water, the delivery port of the pretreatment unit connects the heating bath 1 water inlet A, the pretreatment unit 1 is one kind of sedimentation basin, oil interceptor, oxidation pond, softening pond, filter or biochemistry pool Or several combinations.
Heating bath 2, is provided with heat exchanger 6 and agitating device, outside the heating bath 2 for heating in raw water, the heating bath 2 Exhaust steam pipeline A is provided with, aspiration pump 4 and vapour compression machine 5 are sequentially provided with the exhaust steam pipeline A, wherein, exhaust steam Jing aspiration pumps 4 Into vapour compression machine 5, the gas outlet of the vapour compression machine 5 is connected with the air inlet of heat exchanger 6, and the heat exchanger 6 goes out Gas port connects boiler 7;The vapour compression machine 5 is for single-stage vapor compression machine or using multi-stage vapor compression machine series operation.
It is additionally provided with exhaust steam pipeline B outside the heating bath 2, the exhaust steam pipeline B is provided with condenser 3, coagulates described in exhaust steam Jing Vapour device 3 enters boiler, and exhaust steam in the condenser 3 takes countercurrent flow with recirculated cooling water.
Distillation device 8, its hot side solution end water inlet connects the delivery port of heating bath 2, and its hot side solution brings out the mouth of a river Jing water pumps 9 connect the water inlet B of heating bath 2, and is produced from pond 11 in the condensed connection of device 10 of steam outlet of distillation device 8.
The exhaust steam pipeline A is provided with flow monitoring device A13, and the flow monitoring device A13 is located at aspiration pump 4 and steams Between vapour compressor 5;The recirculated cooling water water inlet end of the condenser 3 is provided with flow monitoring device B14;In the condenser 3 It is provided with pressure monitoring device 15;The flow monitoring device A13, flow monitoring device B14 and pressure monitoring device 15 are all connected with PLC self-con-tained units 16.
Embodiment 1
The method for carrying out water process using residual heat of electric power plant using described water treatment facilities, with certain Desulphurization for Coal-fired Power Plant waste water For process object, comprise the following steps:
Step 1, desulfurization wastewater removes heavy metal in waste water, suspends through chemical precipitation, softening, flocculation precipitation pretreatment The pollutant such as thing and hardness, into heating bath 2;
Step 2, in the exhaust steam that turbine low pressure cylinder is discharged, exhaust steam enters vapour compression machine 5 after the extraction of aspiration pump 4;
Step 3, the exhaust steam Jing after vapour compression machine 5 compresses is warming up to the heat exchanger 6 entered in heating bath 2 after 90 DEG C, leads to Cross heat exchanger 6 to heat the desulfurization wastewater in heating bath 2, while exhaust steam condensation, the condensed water Jing produced after exhaust steam condensation Cross and returned in boiler 7 after backheat and deoxygenation process;
By PLC self-con-tained units 16 to the recirculated cooling water flow of inlet water in condenser 3, the pressure in condenser 3 and weary Vapour coordinates control into the extraction flow of vapour compression machine 5, 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 desulfurization wastewater enters film under the swabbing action of water pump Distilling apparatus 8, the desulfurization wastewater after membrane distillation concentration is back in heating bath 2, and Repeat-heating and membrane distillation concentration are processed. In the presence of vavuum pump 12, the water vapour that desulfurization wastewater is produced 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 salt content in heating bath 2 is up to 18%, the desulfurization wastewater in heating bath 2 is discharged, 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 by circulating cooling water condensation.
As Membrane Materials process the gradually increase of the water yield, circulating cooling water consumption is gradually reduced;When Membrane Materials process the water yield When sufficiently large, the operation of recirculated cooling water can be cancelled, the recirculating cooling water system in condenser is used as emergency power system.
Embodiment 2
The method for carrying out water process using residual heat of electric power plant using described water treatment facilities, with the sea of certain coastal coal-burning power plant Water is process object, and to seawater desalt processing is carried out, and comprises the following steps:
Step 1, pumps into regulating reservoir by seawater first, then through the pretreatment such as softening, flocculation sediment, filtration, removes useless The pollutant such as suspension and hardness in water, into heating bath 2;
Step 2, in the exhaust steam that turbine low pressure cylinder is discharged, exhaust steam enters vapour compression machine 5 after the extraction of aspiration pump 4;
Step 3, the exhaust steam Jing after vapour compression machine 5 compresses is warming up to the heat exchanger 6 entered in heating bath 2 after 65 DEG C, leads to Cross heat exchanger 6 to heat the seawater in heating bath 2, while exhaust steam condensation, the condensed water of generation is passed through back after exhaust steam condensation Heat and deoxygenation are returned in boiler 7 after processing;
By PLC self-con-tained units 16 to the recirculated cooling water flow of inlet water in condenser 3, the pressure in condenser 3 and weary Vapour coordinates control into the extraction flow of vapour compression machine 5, it is ensured that the vacuum in condenser is in zone of reasonableness, it is to avoid Affect upstream generating efficiency.
Step 4, to 60 DEG C, seawater enters distillation device to the heating of seawater in heating bath 2 under the swabbing action of water pump 8, the seawater after membrane distillation concentration is back in heating bath 2, and Repeat-heating and membrane distillation concentration are processed.In vavuum pump 12 Under effect, the water vapour that seawater is produced in distillation device 8 is discharged membrane module and enters condenser 10, and condensed water is entered and produces water Pond 11 is collected and is back to power plant's production, resident living.
Step 5, when the seawater salt content in heating bath 2 is up to 20%, the seawater in heating bath 2 is discharged, and repetition is 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 by circulating cooling water condensation.
As Membrane Materials process the gradually increase of the water yield, circulating cooling water consumption is gradually reduced;When Membrane Materials process the water yield When sufficiently large, the operation of recirculated cooling water can be cancelled, the recirculating cooling water system in condenser is used as emergency power system.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.

Claims (6)

1. a kind of water treatment facilities of utilization residual heat of electric power plant, it is characterised in that include:
Heating bath (2), for heating in raw water, the heating bath (2) heat exchanger (6) is provided with, and the heating bath (2) is externally provided with weary Vapor pipeline A, is sequentially provided with aspiration pump (4) and vapour compression machine (5) on the exhaust steam pipeline A, wherein, exhaust steam Jing aspiration pumps (4) Into vapour compression machine (5), the gas outlet of the vapour compression machine (5) is connected with the air inlet of heat exchanger (6), the heat exchanger (6) gas outlet connection boiler (7);
Distillation device (8), the delivery port at its hot side solution end water inlet connection heating bath (2), its hot side solution brings out the mouth of a river Water is produced in the water inlet B of Jing water pumps (9) connection heating bath (2), the condensed device of steam outlet (10) connection of distillation device (8) Pond (11).
2. the water treatment facilities of utilization residual heat of electric power plant according to claim 1, it is characterised in that also including pretreatment unit (1), for pre-processing to raw water, the delivery port of the pretreatment unit connects the water inlet A of the heating bath (2), institute State pretreatment unit (1) be sedimentation basin, oil interceptor, oxidation pond, the group of one or more that softens pond, filter or biochemistry pool Close.
3. the water treatment facilities of utilization residual heat of electric power plant according to claim 1, it is characterised in that the vapour compression machine (5) for single-stage vapor compression machine or using multi-stage vapor compression machine series operation.
4. the water treatment facilities of utilization residual heat of electric power plant according to claim 1, it is characterised in that in the heating bath (2) It is additionally provided with agitating device.
5. the water treatment facilities of utilization residual heat of electric power plant according to claim 1, it is characterised in that also including exhaust steam pipeline B, The exhaust steam pipeline B is provided with condenser (3), and condenser (3) described in exhaust steam Jing enters boiler, exhaust steam in the condenser (3) Countercurrent flow is taken with recirculated cooling water.
6. the water treatment facilities of utilization residual heat of electric power plant according to claim 5, it is characterised in that
The exhaust steam pipeline A is provided with flow monitoring device A (13), the flow monitoring device A (13) located at aspiration pump (4) and Between vapour compression machine (5);
The recirculated cooling water water inlet end of the condenser (3) is provided with flow monitoring device B (14);
Pressure monitoring device (15) is provided with the condenser (3);
The flow monitoring device A (13), flow monitoring device B (14) and pressure monitoring device (15) are all connected with PLC automatic controls dress Put (16).
CN201621039767.6U 2016-09-06 2016-09-06 Utilize water treatment facilities of power plant's waste heat Active CN206108988U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107676842A (en) * 2017-11-02 2018-02-09 清华大学 The system of hydro-thermal alliance and the regulation and control method of the system are realized using residual heat of electric power plant
WO2018045707A1 (en) * 2016-09-06 2018-03-15 大唐环境产业集团股份有限公司 Water treatment device and method using waste heat from power plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018045707A1 (en) * 2016-09-06 2018-03-15 大唐环境产业集团股份有限公司 Water treatment device and method using waste heat from power plant
CN107676842A (en) * 2017-11-02 2018-02-09 清华大学 The system of hydro-thermal alliance and the regulation and control method of the system are realized using residual heat of electric power plant

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