CN108706671A - A kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas - Google Patents
A kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas Download PDFInfo
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- CN108706671A CN108706671A CN201810869479.0A CN201810869479A CN108706671A CN 108706671 A CN108706671 A CN 108706671A CN 201810869479 A CN201810869479 A CN 201810869479A CN 108706671 A CN108706671 A CN 108706671A
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- Prior art keywords
- flue gas
- desulfurization wastewater
- sintering machine
- temperature flue
- heat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0058—Use of waste energy from other processes or sources, e.g. combustion gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
It is an object of the invention to put forward a kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas, for solving in desulfurization wastewater evaporation treatment process in the prior art, low-temperature flue gas evaporability is relatively low, is evaporated the poor technical problem of effect.A kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas, including：Heat smoke after SCR reactors enters evaporator, and the waste water drop that double fluid atomization nozzle is atomized is evaporated by heat smoke, solid granulates are precipitated；Then flue gas passes through heat exchange coil, and heat is transmitted to the waste water in heat exchange coil, is preheated to waste water；Finally, the flue gas of solid granulates is carried after being evaporated wind turbine pressurization, is discharged into electric precipitator upstream, the solid granulates in flue gas are trapped through electric precipitator.Invention advantageous effect：Using high-temperature flue gas, the rapid evaporation of desulfurization wastewater is realized, avoid the problems such as slow, fouling is evaporated in conventional 120 DEG C or so of temperature range.
Description
Technical field
It is specifically a kind of using sintering machine high-temperature flue gas the present invention relates to desulfurization wastewater evaporation process technical field
Desulfurization wastewater self-preheating type evaporation technology.
Background technology
From the second half year in 2017, country improves the discharge index of steel works sintering machine flue gas, it is desirable that reaches nitrogen oxygen comprehensively
Compound (NOx), sulfur dioxide (SO2), particulate matter (PM) are respectively 50mg/m3、35mg/m3、10mg/m3Minimum discharge standard,
Since 2018, domestic major steel mill introduced sintering device flue gas and heats SCR denitration technique comprehensively immediately.
SCR denitration have simple in structure, operation is convenient, rotating machinery is few, without byproduct, denitration efficiency height, technology maturation,
The advantages that reliable and stable is the most rational technique for being suitable for sintering flue gas denitration at present.Sintering flue gas temperature is relatively low, and about 120
DEG C~150 DEG C or so, SCR reducing process can not be directly applied, the general hot wind using after BF gas heating is mixed into sintering machine
In flue gas, flue-gas temperature is heated to 220 DEG C~320 DEG C, reaches the Process window of SCR.After SCR denitration, flue-gas temperature is about
It 300 DEG C, exchanges heat through GGH and heat is returned into SCR system, then flue gas enters desulphurization system.
In the prior art, desulfurization wastewater evaporation treatment process be applied to power plant, but due to evaporation flue gas temperature compared with
Low (100 DEG C~150 DEG C), therefore relatively low to the evaporability of waste water cause to be evaporated effect poor.In addition, sintering machine desulfuration is useless
The ingredient of the water and pollutant of water and power plant effluent has larger difference, needs distinctive analysis.
The application of sintering machine heating SCR technology provides new thinking for the processing of sintering machine desulfuration waste water, makes burning
Knot machine system has the ability for providing high-temperature flue gas, and base is provided for desulfurization wastewater high-temperature flue gas evaporation technique in the present invention
Plinth.
Invention content
The purpose of the present invention is to provide a kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas,
For solving in desulfurization wastewater evaporation treatment process in the prior art, low-temperature flue gas evaporability is relatively low, and it is poor to be evaporated effect
Technical problem.
The technical scheme adopted by the invention to solve the technical problem is that：A kind of desulfurization using sintering machine high-temperature flue gas is useless
Water self-preheating type evaporation technology, including：
Heat smoke after SCR reactors enters evaporator, and the waste water drop that double fluid atomization nozzle is atomized by heat smoke steams
Dry, solid granulates are precipitated；
Then flue gas passes through heat exchange coil, and heat is transmitted to the waste water in heat exchange coil and is preheated；
Finally, the flue gas of solid granulates is carried after being evaporated wind turbine pressurization, is discharged into electric precipitator upstream, is caught through electric precipitator
Collect the solid granulates in flue gas.
Further, installation heat exchange coil region is equipped with compressed air spraying nozzle, compressed air spraying nozzle and compression
Air inlet line is connected to.
Further, the multiple double fluid atomization nozzles of installation in evaporator, reduce the atomization intensity of unit section, improve and steam
Send out evaporation rate in device.
Further, the waste water inlet pipe road setting electrical heating being connected to the heat exchange coil or steam heater.
Further, the heat smoke inlet flue duct of evaporator is connected to the hot wind discharge pipe after blast furnace gas combustion, with into
One step improves heat smoke temperature in evaporator.
The effect provided in invention content is only the effect of embodiment, rather than invents all whole effects, above-mentioned
It is had the following advantages that in technical solution or advantageous effect：
1, the present invention is effectively utilized the temperature range for the high-temperature flue gas that steel plant's high temperature SCR denitration device is formed, real
The rapid evaporation of existing desulfurization wastewater avoids the problems such as slow, fouling is evaporated in conventional 120 DEG C or so of temperature range.
2, using about 150 DEG C of flue gas after desulfurization wastewater is evaporated, further discharge heat, will atomization be evaporated before desulfurization
Waste water preheats, and good basic condition is provided for the atomization and vaporization of desulfurization wastewater；The waste heat heat of flue gas is taken full advantage of simultaneously
Energy.
3, being evaporated device can realize integration, integrated design, it can be achieved that batch production processing and fabricating and precision assembly, are improved
Site operation speed and quality.
Description of the drawings
Fig. 1 is the structural principle framework figure of the embodiment of the present invention；
In figure：1, desulfurization wastewater entrance pipe；2, it is evaporated wind turbine；3, compressed air inlet pipeline；4, twin sprays
Mouth；5, compressed air spraying nozzle；6, heat exchange coil；7, evaporator；8, heat smoke inlet flue duct；9, heat smoke exhaust pass；
10, electric precipitator.
Specific implementation mode
In order to clearly illustrate the technical characterstic of this programme, below by specific implementation mode, and its attached drawing is combined, to this
Invention is described in detail.It should be noted that illustrated component is not drawn necessarily to scale in the accompanying drawings.Present invention omits right
Known assemblies and known technology description, to avoid the present invention is unnecessarily limiting.
As shown in Figure 1, a kind of system of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas, including
Evaporator 7, desulfurization wastewater entrance pipe 1, heat exchange coil 6, double fluid atomization nozzle 4, heat smoke inlet flue duct 8, heat smoke go out
Mouth flue 9 and compressed air inlet pipeline 3.
The evaporator 7 uses double-level-metal siding, the inner wall of evaporator 7 to use smooth stainless steel plate, avoids fouling, same
When be convenient for deashing, the structure pressure-bearing body of evaporator 7 to use carbon steel structure.The double fluid atomization nozzle 4 is mounted in evaporator 7
Top, heat exchange coil 6 is mounted on the lower part in evaporator 7, the liquid feeding end of heat exchange coil 6 and the desulfurization wastewater entrance pipe
1 outlet end connection, the outlet end of heat exchange coil 6 are connected to the liquid feeding end of double fluid atomization nozzle 4；Meanwhile the two-fluid
Atomizer 4 is connected to the top branch pipe of the compressed air inlet pipeline 3.Compressed air spray is additionally provided in the evaporator 7
Blow and spray mouth 5, compressed air spraying nozzle 5 is located at the heat exchange coil 6, for be adhered to the particle on heat exchange coil 6 into
Row injection；The air intake of compressed air spraying nozzle 5 is connected to the lower part branch pipe of the compressed air inlet pipeline 3.The steaming
It sends out device 7 to be mounted on after SCR reactors, the top air intake of evaporator 7 passes through heat smoke inlet flue duct 8 and SCR reactors
Air outlet pipeline is connected to, and the lower part outlet air end of evaporator 7 passes through heat smoke exhaust pass 9 and SCR reactors front electric precipitator 10
The connection of front end blast pipe, the heat smoke exhaust pass 9 is equipped with and is evaporated wind turbine 2.
A kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas
Fume side：300 DEG C or more of the heat smoke after SCR reactors, be evaporated wind turbine 2 draw suction under, pass through hot cigarette
Gas inlet flue duct 8 enters evaporator 7, and the moisture drop that double fluid atomization nozzle 4 is atomized is evaporated by flue gas heat, salt analyzes,
Flue-gas temperature is down to 150 DEG C or so；Then flue gas gives up the desulfurization that heat is transmitted in heat exchange coil 6 back through heat exchange coil 6
Water preheats, and flue gas is down to 90 DEG C or less；Finally, flue gas is discharged into 10 upstream of electric precipitator, is removed through electricity after being evaporated wind turbine 2 and pressurizeing
Dirt device 10 traps the solid granulates in flue gas.Water side：It is not less than 0.5MPa after steel plant's desulfurization wastewater is pressurized, it is useless by desulfurization
Water inlet pipeline 1 enters heat exchange coil 6, is fully warmed-up to 90 DEG C or more through heat exchange coil 6, and good basis is provided for evaporation；
Then, become 50 μm of drops below through the atomization of double fluid atomization nozzle 4, and be evaporated rapidly under 300 DEG C of heat smoke environment,
And then the ingredients such as inorganic salts, heavy metal in waste water are evaporated rapidly precipitation as solid granular, are taken away with flue gas.It is empty in compression
Gas side：High pressure air is divided into two-way after entering system by compressed air inlet pipeline 3, and upper branch enters two-fluid mist
Change nozzle 4, drop is fully smashed, assisted atomization；Lower leg enters the compressed air spraying being arranged in 6 region of heat exchange coil
Nozzle 5 is blown the particle being adhered on heat exchange coil 6, prevents particle from adhering to, influences heat transfer effect.
Preferably, double fluid atomization nozzle quantity can suitably be increased, multiple double fluid atomization nozzles 4 can upper and lower parallel cloth
It sets, to reduce the atomization intensity of unit section, improves evaporation rate in evaporator 7.The installation of double fluid atomization nozzle 4, Ying Chong
Divide and consider the factors such as spray angle, jet length, particle evaporation intensity and time, the wall surface of evaporator 7 is fully avoided to become dry
Wet interface.Electrical heating can be added on desulfurization wastewater entrance pipe 1 or steam heater auxiliary improves waste water temperature, in water pump
In the case that pressure reaches, waste water temperature can be carried to 100 DEG C or more.Heat smoke inlet flue duct 8 can with after blast furnace gas combustion
The connection of hot wind discharge pipe, waste water is evaporated the hot wind after flue gas utilization part blast furnace gas combustion used, can further improve
Evaporating temperature is to 350 DEG C even 400 DEG C.Spiral-flow type structure can be used inside evaporator 7, raising heat smoke connects with waste water drop
It touches intensity and time of contact, guarantee is evaporated effect.
It is the known technology of those skilled in the art in addition to the technical characteristic described in specification.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, based on the technical solution of the present invention, those skilled in the art, which would not require any inventive effort, to be done
The various modifications or changes gone out are still within the scope of the present invention.
Claims (5)
1. a kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas, characterized in that including：
High warm flue gas after SCR reactors enters evaporator, and the waste water drop that double fluid atomization nozzle is atomized by heat smoke steams
Dry, solid granulates are precipitated；
Then flue gas passes through heat exchange coil, and heat is transmitted to the waste water in heat exchange coil and is preheated；
Finally, the flue gas of solid granulates is carried after being evaporated wind turbine pressurization, is discharged into electric precipitator upstream, cigarette is trapped through electric precipitator
Solid granulates in gas.
2. a kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas according to claim 1,
It is characterized in, installation heat exchange coil region is equipped with compressed air spraying nozzle, and compressed air spraying nozzle is managed with compressed air inlet
Road is connected to.
3. a kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas according to claim 1,
It is characterized in, the multiple double fluid atomization nozzles of installation in evaporator reduce the atomization intensity of unit section, improve evaporation in evaporator
Rate.
4. a kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas according to claim 1,
It is characterized in, the waste water inlet pipe road setting electrical heating being connected to the heat exchange coil or steam heater.
5. a kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas according to claim 1,
It is characterized in, the heat smoke inlet flue duct of evaporator can be connected to the hot wind discharge pipe after blast furnace gas combustion, to further increase
Heat smoke temperature in evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810869479.0A CN108706671A (en) | 2018-08-02 | 2018-08-02 | A kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810869479.0A CN108706671A (en) | 2018-08-02 | 2018-08-02 | A kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas |
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| Publication Number | Publication Date |
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| CN108706671A true CN108706671A (en) | 2018-10-26 |
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ID=63875611
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810869479.0A Withdrawn CN108706671A (en) | 2018-08-02 | 2018-08-02 | A kind of desulfurization wastewater self-preheating type evaporation technology using sintering machine high-temperature flue gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557062A (en) * | 2018-12-10 | 2019-04-02 | 徐州工程学院 | A kind of desulfurization wastewater drop evaporation test device and test method |
| CN110260348A (en) * | 2019-07-08 | 2019-09-20 | 江苏朗润环保科技有限公司 | Hot-blast stove bypass preheating flue gas heat-exchange unit prevents low-temperature corrosion process system and method |
| CN112169361A (en) * | 2020-11-10 | 2021-01-05 | 上海天晓环保工程有限公司 | Energy-saving high-efficiency ammonia water evaporation device |
| CN113908678A (en) * | 2021-12-15 | 2022-01-11 | 山东东源新材料科技有限公司 | Cement pit flue gas denitration device and using method thereof |
-
2018
- 2018-08-02 CN CN201810869479.0A patent/CN108706671A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557062A (en) * | 2018-12-10 | 2019-04-02 | 徐州工程学院 | A kind of desulfurization wastewater drop evaporation test device and test method |
| CN110260348A (en) * | 2019-07-08 | 2019-09-20 | 江苏朗润环保科技有限公司 | Hot-blast stove bypass preheating flue gas heat-exchange unit prevents low-temperature corrosion process system and method |
| CN110260348B (en) * | 2019-07-08 | 2024-04-16 | 江苏朗润环保科技有限公司 | Low-temperature corrosion prevention process system and method for bypass preheating flue gas heat exchanger of hot blast stove |
| CN112169361A (en) * | 2020-11-10 | 2021-01-05 | 上海天晓环保工程有限公司 | Energy-saving high-efficiency ammonia water evaporation device |
| CN113908678A (en) * | 2021-12-15 | 2022-01-11 | 山东东源新材料科技有限公司 | Cement pit flue gas denitration device and using method thereof |
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Application publication date: 20181026 |