CN208008493U - A kind of equipment that flue residue heat is used for Waste Water From Fire Power Plant zero discharge treatment - Google Patents
A kind of equipment that flue residue heat is used for Waste Water From Fire Power Plant zero discharge treatment Download PDFInfo
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- CN208008493U CN208008493U CN201820227091.6U CN201820227091U CN208008493U CN 208008493 U CN208008493 U CN 208008493U CN 201820227091 U CN201820227091 U CN 201820227091U CN 208008493 U CN208008493 U CN 208008493U
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Abstract
A kind of equipment that flue residue heat is used for Waste Water From Fire Power Plant zero discharge treatment, dedicated for all kinds of effluent sewage advanced treating zero-emission recyclings of thermal power plant, mainly for the water treatment technology of the energy-saving zero discharge treatment technology of the produced waste water of large thermal power plant wet process of FGD processing system and the effluent sewage of other techniques generation, the waste water treatment process system is designed as waste water and is heated through chimney heat exchanger, waste water after heating enters the most moisture of induced cooling tower spraying and sprinkling evaporation, remaining concentration waste water is sent by atomizer pump after air preheater, flue section before electric precipitation carries out spray evaporation, dry particle enters electric precipitator together with flue gas, it is captured with dust, with grey outer row, it is achieved in zero-emission.
Description
Technical field
The utility model belongs to technical field of waste water processing, and in particular to flue residue heat is used for thermal power plant to a kind of
The equipment of wastewater zero discharge processing.
Background technology
Thermoelectricity accounts for about 80% or so in China's capacity of installed generator, has broken through 1,000,000,000 kilowatts, fired power generating unit based on fire coal,
With increasing substantially for installed capacity, thermoelectricity coal consumption ratio gradually increases.Coal is as a kind of low-grade fossil energy, coal
Middle ash content and sulfur content are higher.The SO2 about 90% of China's discharge comes from fire coal, the acid deposition contamination hazard ecosystem and the public
Health.Increasingly strict with national environmental protection policy, most of in-service fired power generating unit and newly-built fired power generating unit are provided with flue gas
Desulfurizer ensures boiler smoke qualified discharge.Currently, it is lime-stone that coal fired power plant flue gas desulfurization device is most widely used
The Main By product of cream wet desulfurizing process, the technique is desulfurated plaster and desulfurization wastewater, and desulfurization wastewater contains a large amount of miscellaneous
Matter, such as suspended matter, inorganic ion, heavy metal ion, desulfurization wastewater need water treatment is up to standard could recycle or discharge.
In addition to desulfurization wastewater, thermal power plant's sewage further includes industrial colling draining, chemical water treatment system acid-alkali regeneration dirt
Water, filter backwash sewage, cleaning boiler sewage, defeated coal rinses and dedusting sewage, oily wastewater, cooling tower blowdown sewage etc..
Since the type of trade effluent is more, pollutant kind, content and the discharge capacity of all kinds of sewage are not fixed, and cause the ingredient of trade effluent
Considerably complicated, major pollutants have：Suspended matter, oil, organic matter and sulfide etc., this kind of sewage, which is discharged into receiving water body, to be drawn
Different degrees of environmental pollution is played, ecological disruption is caused.
Currently, desulfuration waste water treatment process basic step is neutralized, flocculated nothing more than, precipitating and outer row.It is newly developed in recent years
Many desulfuration waste water treatment process, basically comprise pretreatment, concentration, solidification, reuse or arrange several links outside.Concentration has film
The techniques such as concentration, MVR evaporations, MED evaporations, Electrostatic Absorption, solidification have natural evaporation crystallization, evaporation pond, mechanical atomization evaporation, cigarette
Road spray evaporation, bypass smoke evaporative etc., this kind of technique respectively have advantage and disadvantage, for example film concentration needs newly with MVR evaporative crystallization techniques
Though the installations and facilities and investment consumption of increase are big, evaporation pond takes up a large area, Electrostatic Absorption is energy saving but cannot handle containing salinity
Waste water, the bypass smoke evaporative of 40000mg/L or more need to introduce air preheater entrance side high-temperature flue gas and influence the air preheater thermal efficiency
And increasing coal consumption, some prior art designs are complicated, and equipment failure rate is high, operational effect is undesirable, dehydrating effect is bad, sludge
Processing disposition is inconvenient, there are phenomenon etc. is arranged outside high-salt wastewater.If these problems are not well solved, will seriously affect
The commercial Application of various desulfuration waste water treatment process.
In conclusion needing design a kind of reasonable in design, operating cost is low, and operation stability is high, can effectively remove
The pollution factors such as high salinity (salt content 15000mg/L~110000mg/L), heavy metal ion and solid suspension in waste water
Desulfurizing waste water processing device.
Invention content
The technical problem to be solved by the utility model is to overcome the deficiencies of existing technologies, provide a kind of reasonable design,
It is simple in structure, operating cost is low, operation stability is high, can effectively remove high salinity in waste water and heavy metal ion and solid
The equipment for Waste Water From Fire Power Plant zero discharge treatment of the pollution factors such as suspended matter.
Solve above-mentioned technical problem the technical solution adopted is that：Waste water is pumped into the water inlet pipe of chimney heat exchanger by recycling,
The outlet pipe of chimney heat exchanger is connected by pipeline with the entrance of ball screen, and ball screen ball side outlet is by being mounted on pipeline
Rubber ball pump be connected with the entrance of glueballs supply device, the outlet of glueballs supply device passes through pipeline and chimney heat exchanger water inlet pipe phase
Connection；Ball screen water side outlet is connected by pipeline with the water distribution system entrance of induced cooling tower, mechanical draft cooling
Tower lower part is provided with wastewater disposal basin, is fallen into the wastewater disposal basin of lower section by the density wastewater of induced cooling tower spraying and sprinkling evaporation；Wastewater disposal basin
Interior first outlet is connected by the circulating pump on pipeline with the water inlet pipe of chimney heat exchanger, second outlet passes through peace
The entrance phase that atomizer pump and filter on pipeline are connected with atomising device, third outlet passes through pipeline and desliming device
The outlet of connection, desliming device returns to wastewater disposal basin, the compressed air of compressed air unit by the clear liquid pump on pipeline
It sprays through atomising device outlet nozzle after converging into atomising device with waste water, atomising device is arranged in air preheater and electrostatic
On flue between deduster, by the shell-side air inlet of air-introduced machine and chimney heat exchanger on flue after electrostatic precipitator
Mouth is connected, and the shell-side gas outlet of chimney heat exchanger is connected by flue with the desulfurizing tower being arranged before chimney.
The chimney heat exchanger of the utility model is：Vertical flow of flue gas direction is provided with and is mounted on shell inside housings
The tube bank that tube sheet in opposing sidewalls is connected, tube bank horizontally disposed can also arrange that tube sheet is at least provided with one group, pipe vertically
It is provided with hydroecium on the outside of plate, detachable end is provided on hydroecium, corresponding water inlet pipe and outlet pipe are provided on hydroecium, is managed
Beam interior media is waste water.
The induced cooling tower of the utility model is：It is provided with cooling blower at the top of tower body, is provided in the middle part of tower body
Water collection device is provided with water distribution system in tower body below water collection device, and water distribution system is connected with ball screen water side outlet, matches in tower body
It is provided with packing layer below water system, is provided with V-type pillar below tower body, air is introduced by branch intercolumniation when operation, V-type pillar bottom
Portion is provided with wastewater disposal basin.
The desliming device of the utility model is decanter centrifuge or plate and frame filter press.
The utility model has the following advantages：
1, the technology of the utility model can realize energy-saving zero discharge treatment compared with the prior art.
2, the technique of the utility model absorb traditional handicraft concentration, solidification technology the advantages of, each link is excellent
First consider energy conservation measure, the chimney heat exchanger before desulfurizing tower takes full advantage of fume afterheat, environmental protection and energy saving, while reducing desulfurizing tower
Into smoke temperature degree, reduce desulfurizing tower water consume；Chimney heat exchanger realizes that the direct heat transfer of desulfurization wastewater, the logical glueballs in inside avoid dirt
It is stifled；Chimney heat exchanger tube bank arranges that both ends are equipped with removable end cap, and not shutting down can repair and maintenance perpendicular to flue gas flow direction；Machine
The evaporation cooling of power aerating and cooling tower is of less demanding to water temperature, as long as having the temperature difference that natural evaporation can be realized with external environment；Spraying
Evaporation process Technology design is reliable, and compressed air is sprayed with suitable gas-liquid two-phase than being atomized after mixing with density wastewater, atomized liquid
Drip diameter and the optimized design of drop initial velocity, it is ensured that drop is all evaporated before entering electric precipitation.At spray evaporation
After reason technology, smoke moisture increases in right amount, flue-gas temperature declines in right amount, flue gas still in undersaturated condition, be higher than acid dew point temperature
Degree will not generate corrosion to flue and electric precipitation；And the appropriate increase of smoke moisture reduces specific resistance grey in flue gas, can carry
The efficiency of high electric precipitation, the appropriate of flue-gas temperature decline the cooling water consume for also reducing electric precipitation；Skill is handled using spray evaporation
Postoperative, dust size increases in flue gas, also improves efficiency of dust collection.After spray evaporation treatment technology, chlorine in waste water from
Son is captured in the form of particulate matter by electric precipitation, overcomes chlorion in traditional technology and corrodes big lack in slant acidity water environment
Point.
3, the concentration water that spray evaporation is handled in the utility model is small, by taking the power plant units of 300MW as an example, at spraying
It manages concentrated water amount and is less than 2 ton hours, electric precipitation ash disposal is run useful and harmless.
4, the utility model technological design is reasonable, and operating cost is low, maintenance is few, and work is handled better than traditional desulfurization wastewater
Skill.The utility model is suitable for the processing of thermal power plant's lime-gypsum wet desulfurization wastewater, is also applied for the other waste water of thermal power plant
Processing.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model one embodiment.
Fig. 2 is the structural schematic diagram of induced cooling tower 5 in Fig. 1.
Fig. 3 is the structural schematic diagram of chimney heat exchanger 16 in Fig. 1.
In figure：1, circulating pump；2, glueballs supply device；3, Rubber ball pump；4, ball screen；5, induced cooling tower；6, waste water
Pond；7, atomizer pump；8, filter；9, clear liquid pump；10, desliming device；11, air preheater；12, atomising device；13, compressed air list
Member；14, electrostatic precipitator；15, air-introduced machine；16, chimney heat exchanger；17, desulfurizing tower；18, chimney；5-1, cooling blower；5-2,
Tower body；5-3, water collection device；5-4, water distribution system；5-5, packing layer；5-6, V-type pillar；16-1, end cap；16-2, shell；16-3,
Tube sheet；16-4, tube bank；16-5, outlet pipe；16-6, hydroecium；16-7, water inlet pipe.
Specific implementation mode
The utility model is described in further details with reference to the accompanying drawings and examples, but the utility model is not limited to this
A little embodiments.
Embodiment 1
In Fig. 1,2,3, a kind of equipment that flue residue heat is used for Waste Water From Fire Power Plant zero discharge treatment, waste water is by following
Ring pump 1 is sent into the water inlet pipe of chimney heat exchanger 16, and the chimney heat exchanger 16 of the present embodiment is by end cap 16-1, shell 16-2, tube sheet
16-3, tube bank 16-4, outlet pipe 16-5, hydroecium 16-6, water inlet pipe 16-7 are connected and composed, in shell 16-2 internal vertical flue gas streams
Dynamic direction is provided with tube bank 16-4, restrains 16-4 and is connected with the tube sheet 16-3 in shell opposing sidewalls, tube sheet 16-3
At least provided with one group, ensure, tube sheet 16-3 outside at least primary by heating in tube bank 16-4 from the waste water that circulating pump 1 enters
Hydroecium 16-6 is installed, detachable end 16-1 is installed on hydroecium 16-6, corresponding water inlet pipe is provided on hydroecium 16-6
16-7 and outlet pipe 16-5, tube bank 16-4 interior medias are waste water, restrain to be full of outside 16-4 inside shell 16-2 and be removed by electrostatic
The heat smoke that dirt device 14 enters, tube bank 16-4 are arranged perpendicular to flow of flue gas direction, horizontally disposed also can vertically arrange, ensure
The flow area of chimney heat exchanger 16 meets the requirement of flue gas overcurrent, eliminates drag losses, the detachable end being arranged on hydroecium 16-6
Cover 16-1, realization do not shut down can repair and maintenance, improve waste water treatment efficiency.
The outlet pipe of chimney heat exchanger 16 is connected by pipeline with the entrance of ball screen 4, and 4 ball side outlet of ball screen passes through
Rubber ball pump 3 on pipeline is connected with the entrance of glueballs supply device 2, and the outlet of glueballs supply device 2 passes through pipeline and cigarette
Heat exchanger 16 water inlet pipe in road is connected；The water distribution system entrance that 4 water side outlet of ball screen passes through pipeline and induced cooling tower 5
Be connected, the induced cooling tower 5 of the present embodiment by cooling blower 5-1, tower body 5-2, water collection device 5-3, water distribution system 5-4,
Packing layer 5-5, V-type pillar 5-6 are connected and composed, and cooling blower 5-1 is equipped at the top of tower body 5-2, is equipped in the middle part of tower body 5-2
Water distribution system 5-4 is installed below water collection device 5-3 in water collection device 5-3, tower body 5-2, water distribution system 5-4 goes out with 4 water side of ball screen
Mouth is connected, and is equipped with packing layer 5-5 below water distribution system 5-4 in tower body 5-2, tower body bottom is equipped with V-type pillar 5-7, machine
5 lower part of power aerating and cooling tower is provided with wastewater disposal basin 6, and the useless of lower part is fallen by the density wastewater of induced cooling tower spraying and sprinkling evaporation
In pond.
The water inlet pipe phase that first outlet in wastewater disposal basin 6 passes through circulating pump 1 and chimney heat exchanger 16 on pipeline
Connection, second outlet are connected by atomizer pump 7 on pipeline and filter 8 with atomising device 12, third outlet leads to
Piping is connected with the entrance of desliming device 10, and the desliming device 10 of the present embodiment is decanter centrifuge or plate and frame filter press,
Wastewater sedimentation mud is dehydrated by desliming device 10 and is discharged, and the clear liquid that desliming device 10 is thrown away passes through the clear liquid on pipeline
Pump 9 sends back to wastewater disposal basin, and the compressed air of compressed air unit 13 enters after atomising device 12 converges with waste water through atomising device
12 outlet nozzles are sprayed, and atomising device 12 is arranged on the flue between air preheater 11 and electrostatic precipitator 14, and electrostatic removes
It is connected with the shell-side air inlet of chimney heat exchanger 16 by the air-introduced machine 15 on flue after dirt device 14, chimney heat exchanger
16 shell-side gas outlet is connected by flue with the desulfurizing tower 17 being arranged before chimney 18.
The atomising device 12 of the present embodiment is detachable atomizing stem, and one end is arranged on flue, the other end is provided with atomization
Nozzle, further, spraynozzle are uniformly arranged perpendicular to flue two side, and density wastewater atomizer pump 7 is sent into atomising device
12 air exported with compressed air unit 13 are mixed with certain gas-liquid two-phase ratio, and cigarette is sprayed into perpendicular to flue gas flow direction after atomization
In road, atomized drop is absorbed in flue and is evaporated after fume afterheat, and with flue gas emission, the solids and flue stream in desulfurization wastewater are grey
Enter electrostatic precipitator together, captured by electrode, with grey outer row.
The operation principle of the utility model is as follows：
Waste water is heated to carry out spray steaming into induced cooling tower 5 afterwards through the entrance chimney heat exchanger 16 of circulating pump 1
Hair, the concentrated water after evaporation fall into lower section wastewater disposal basin 6, and the concentrated water supernatant in wastewater disposal basin 6 is sent through atomizer pump 7 to atomising device 12,
It is atomized together with the compressed air that compressed air unit 13 is sent into after being ejected to air preheater 11, the flue before electrostatic precipitator 14
Interior, spray droplet is evaporated with heat smoke confluence, and brings dust the removal of into 14 electrostatic of electrostatic precipitator.
Claims (4)
1. a kind of equipment that flue residue heat is used for Waste Water From Fire Power Plant zero discharge treatment, it is characterised in that：Waste water is by recycling
It is pumped into the water inlet pipe of chimney heat exchanger, the outlet pipe of chimney heat exchanger is connected by pipeline with the entrance of ball screen, and ball is received
Tennis side outlet is connected by the Rubber ball pump on pipeline with the entrance of glueballs supply device, and the outlet of glueballs supply device is logical
Piping is connected with chimney heat exchanger water inlet pipe；Ball screen water side outlet matches water system by pipeline and induced cooling tower
System entrance is connected, and induced cooling tower lower part is provided with wastewater disposal basin, by the dense useless of induced cooling tower spraying and sprinkling evaporation
Water is fallen into the wastewater disposal basin of lower section；First outlet in wastewater disposal basin by circulating pump on pipeline and chimney heat exchanger into
Water pipe is connected, second outlet is by atomizer pump on pipeline and filter is connected with atomising device, third exports
It is connected with the entrance of desliming device by pipeline, the outlet of desliming device returns to waste water by the clear liquid pump on pipeline
Pond, the compressed air of compressed air unit enters after atomising device converges with waste water sprays through atomising device outlet nozzle,
On the flue that atomising device is arranged between air preheater and electrostatic precipitator, by drawing on flue after electrostatic precipitator
Wind turbine is connected with the shell-side air inlet of chimney heat exchanger, and the shell-side gas outlet of chimney heat exchanger by flue and is arranged in chimney
Preceding desulfurizing tower is connected.
2. a kind of equipment that flue residue heat is used for Waste Water From Fire Power Plant zero discharge treatment according to claim 1,
It is characterized in that the chimney heat exchanger is：Vertical flow of flue gas direction is provided with and is mounted on shell opposite side inside housings
The tube bank that tube sheet on wall is connected, tube bank horizontally disposed also can vertically arrange, tube sheet is at least provided with one group, on the outside of tube sheet
It is provided with hydroecium, detachable end is provided on hydroecium, corresponding water inlet pipe and outlet pipe are provided on hydroecium, tube bank is internal
Medium is waste water.
3. a kind of equipment that flue residue heat is used for Waste Water From Fire Power Plant zero discharge treatment according to claim 1,
It is characterized in that the induced cooling tower is：It is provided with cooling blower at the top of tower body, water collection device is provided in the middle part of tower body,
It is provided with water distribution system below water collection device in tower body, water distribution system is connected with ball screen water side outlet, water distribution system in tower body
Lower section is provided with packing layer, is provided with V-type pillar below tower body, and air is introduced by branch intercolumniation when operation, the setting of V-type posts bottom
There is wastewater disposal basin.
4. a kind of equipment that flue residue heat is used for Waste Water From Fire Power Plant zero discharge treatment according to claim 1,
It is characterized in that：The desliming device is decanter centrifuge or plate and frame filter press.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820227091.6U CN208008493U (en) | 2018-02-08 | 2018-02-08 | A kind of equipment that flue residue heat is used for Waste Water From Fire Power Plant zero discharge treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820227091.6U CN208008493U (en) | 2018-02-08 | 2018-02-08 | A kind of equipment that flue residue heat is used for Waste Water From Fire Power Plant zero discharge treatment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110342714A (en) * | 2019-07-04 | 2019-10-18 | 华电电力科学研究院有限公司 | A kind of coal-burning power plant's process without drainage of waste water system and method based on semi-dry desulphurization technology |
| CN111252993A (en) * | 2020-03-25 | 2020-06-09 | 成都锐思环保技术股份有限公司 | System and method for evaporating and concentrating desulfurization wastewater by using flue gas waste heat |
| CN112225280A (en) * | 2020-10-26 | 2021-01-15 | 中国电力工程顾问集团中南电力设计院有限公司 | Desulfurization waste water advances in enhancement evaporation decrement system in indirect air cooling tower |
| CN112456586A (en) * | 2020-10-26 | 2021-03-09 | 中国电力工程顾问集团中南电力设计院有限公司 | Method for enhancing evaporation reduction of desulfurization wastewater in indirect air cooling tower |
| CN114573061A (en) * | 2022-02-28 | 2022-06-03 | 中国水利水电科学研究院 | External desulfurization waste liquid treatment system based on natural draft wet cooling tower |
-
2018
- 2018-02-08 CN CN201820227091.6U patent/CN208008493U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110342714A (en) * | 2019-07-04 | 2019-10-18 | 华电电力科学研究院有限公司 | A kind of coal-burning power plant's process without drainage of waste water system and method based on semi-dry desulphurization technology |
| CN111252993A (en) * | 2020-03-25 | 2020-06-09 | 成都锐思环保技术股份有限公司 | System and method for evaporating and concentrating desulfurization wastewater by using flue gas waste heat |
| CN112225280A (en) * | 2020-10-26 | 2021-01-15 | 中国电力工程顾问集团中南电力设计院有限公司 | Desulfurization waste water advances in enhancement evaporation decrement system in indirect air cooling tower |
| CN112456586A (en) * | 2020-10-26 | 2021-03-09 | 中国电力工程顾问集团中南电力设计院有限公司 | Method for enhancing evaporation reduction of desulfurization wastewater in indirect air cooling tower |
| CN114573061A (en) * | 2022-02-28 | 2022-06-03 | 中国水利水电科学研究院 | External desulfurization waste liquid treatment system based on natural draft wet cooling tower |
| CN114573061B (en) * | 2022-02-28 | 2023-08-15 | 中国水利水电科学研究院 | External desulfurization waste liquid treatment system based on natural ventilation wet cooling tower |
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