CN104501568B - A kind of system improving dry tail gas Water Sproading efficiency and application process thereof - Google Patents
A kind of system improving dry tail gas Water Sproading efficiency and application process thereof Download PDFInfo
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- CN104501568B CN104501568B CN201510015771.2A CN201510015771A CN104501568B CN 104501568 B CN104501568 B CN 104501568B CN 201510015771 A CN201510015771 A CN 201510015771A CN 104501568 B CN104501568 B CN 104501568B
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Abstract
The present invention relates to a kind of system improving dry tail gas Water Sproading efficiency, this system includes scrubbing tower, flash tank, venturi tower, recovery water pot, heat exchanger.The side of scrubbing tower is provided with dry tail gas input pipe, water inlet pipe, is dried tail gas outlet tube, and its top is connected with the bottom of flash tank, and bottom it, scrubbed tower circulating pump is connected with pipeline III；It is dried tail gas outlet tube and is connected with dry tail gas line；The end of pipeline III is connected with flash tank, and this flash tank is connected with venturi tower；The side of venturi tower is provided with pipeline V, and its opposite side is provided with pipeline VI, VII, is provided with pipeline VIII bottom it；The recovered water pot of pipeline V, recovered water pump are connected with recycle-water pipeline；One end of pipeline VI is connected with the shower nozzle pipeline in venturi tower, and its other end is connected with pipeline VIII；Pipeline VII is connected with vent line；The side of heat exchanger is provided with cooling circulating water return piping, cooling circulating water water-line.The invention also discloses this systematic difference method simultaneously.The present invention invest little, efficiency is high.
Description
Technical field
The present invention relates to a kind of exhaust treatment system and method thereof, particularly relate to a kind of system improving dry tail gas Water Sproading efficiency and application process thereof.
Background technology
Development along with society, environmental problem becomes increasingly conspicuous, to waste water, the emission request of waste gas etc. is more and more higher, in the dry run of material, tail gas can carry out substantial amounts of water vapour in material, if being dried tail gas directly to discharge, not only pollute environment, and can cause being dried the waste of energy in tail gas, and the moisture of evaporation can not be obtained by dry run, dry tail gas can be effectively treated, and reclaim moisture therein, it is not only able to reduce the pollution to environment, but also substantial amounts of water resource can be saved, this is for arid, water-deficient area is particularly important.At present, in industrial process for dry tail gas and institute's moisture vapor thereof process mainly by use following processing mode:
(1) dry method dust and wet dedusting.Dry method dust is generally adopted by sack cleaner or electric cleaner and is removed by the most of dust in dry tail gas, wet dedusting typically uses the mode of water scrubber to be washed by dry tail gas, the sewage that washing produces enters in Sedimentation tank and settles, and the coal-water mixture produced after sedimentation enters back into follow-up device and processes.When the method is finally directly to be discharged by dry tail gas, environment being produced bigger pollution, and the energy in dry tail gas is wasted, wet dedusting also can produce substantial amounts of waste water, adding the discharge of waste water, waste water processes and also can cause bigger economic loss simultaneously.
(2) it is dried tail gas by after dry method dust, enter in scrubbing tower, at this, dry tail gas enters into drying system recycling after being washed water for cooling, dehumidifying, washings after Bei Jiare enter into and carry out vacuum flash in flash distillation plant, the water vapour produced enters back in air cooler and condenses, so that the moisture of evaporation is recovered in dry run.Although the energy in dry tail gas can reasonably be utilized by the method, and the moisture evaporated in dry run can be carried out the recovery of cleaning, but, owing to being limited by environment and relevant equipment, the temperature of flash distillation is higher so that the circulating load of washings increases, thus cause the inefficient of flash process, owing to washing the increase of the water yield, the power also resulting in circulating pump increases, and equipment investment also can increase accordingly.
Summary of the invention
The technical problem to be solved is to provide a kind of system investing the dry tail gas Water Sproading efficiency of little, effective raising.
Another technical problem to be solved by this invention is to provide this raising and is dried the systematic difference method of tail gas Water Sproading efficiency.
For solving the problems referred to above, a kind of system improving dry tail gas Water Sproading efficiency of the present invention, it is characterised in that: this system includes scrubbing tower, flash tank, venturi tower, recovery water pot, heat exchanger；The side of described scrubbing tower is respectively equipped with dry tail gas input pipe, water inlet pipe, is dried tail gas outlet tube, and its top is connected with the bottom of described flash tank by pipeline I, is connected with pipeline III by pipeline II scrubbed tower circulating pump bottom it；Described dry tail gas outlet tube is connected with dry tail gas line through air-introduced machine；The end of described pipeline III is connected with described flash tank, and the top of this flash tank is connected with the top of described venturi tower by pipeline IV；The side of described venturi tower is provided with pipeline V, and its opposite side is respectively equipped with pipeline VI, pipeline VII, is provided with pipeline VIII bottom it；Described pipeline V is connected with recycle-water pipeline through described recovery water pot, recovered water pump successively；One end of described pipeline VI is connected with the shower nozzle pipeline in described venturi tower, and its other end is connected with described pipeline VIII through described heat exchanger, water circulating pump successively；Described pipeline VII is connected with vent line through vacuum pump；The side of described heat exchanger is respectively equipped with cooling circulating water return piping, cooling circulating water water-line.
Described heat exchanger refers to any one in plate type heat exchanger, shell-and-tube heat exchanger, spiral heat exchanger.
A kind of systematic difference method improving dry tail gas Water Sproading efficiency as above, comprises the following steps:
(1) washings enter described scrubbing tower by described water inlet pipe, simultaneously, temperature is that the dry tail gas of 90 ~ 200 DEG C enters described scrubbing tower through described dry tail gas input pipe, and carry out counter current contacting mass transfer, heat transfer with described washings, respectively obtain the dry tail gas after washing, temperature is the washings of 60 ~ 80 DEG C；Dry tail gas after described washing passes sequentially through described dry tail gas outlet tube, described air-introduced machine enters into follow-up system through described dry tail gas line and is circulated use；
The most described temperature is that the washings of 60 ~ 80 DEG C enter described flash tank through described scrubbing tower circulating pump, flash distillation occurs under conditions of pressure is 0.0074 ~ 0.0096MPaA, respectively obtains lime set and steam that temperature is 40 ~ 45 DEG C；Described lime set enters in described scrubbing tower and recycles as washings；
The most described temperature is that the steam of 40 ~ 45 DEG C enters described venturi tower through described pipeline IV, simultaneously, cooling water enters in described venturi tower through described heat exchanger, described pipeline VI from described cooling circulating water water-line successively, after this cooling water carries out injection to the steam that described temperature is 40 ~ 45 DEG C, respectively obtain condensed fluid and not condensing；Described not condensing enters described vent line through described vacuum pump；
A part in the most described condensed fluid passes sequentially through described recovery water pot, described recovered water pump enters into follow-up operation through described recycle-water pipeline, and remainder uses as injection water the most successively in described water circulating pump, described heat exchanger, described pipeline VI enter described venturi tower.
The present invention compared with prior art has the advantage that
1, owing to being provided with venturi tower in the present invention, therefore, the flash-off steam that flash tank is discharged is by after Venturi transmission ejector, the pressure and temperature of flash distillation can be significantly reduced, reduce the consumption of circulating washing water, so that flash efficiency effectively improves, and then reduce the power consumption of system.Meanwhile, steam condensate can use as cooling medium after cooling circulating water heat exchange.
2, the present invention invests little, can be used for that coal is dried apparatus for recovering, mineral are dried apparatus for recovering, chemical products are dried apparatus for recovering it can also be used to the recovery method of some solvents.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
Fig. 1 is the structural representation of the present invention.
In figure: 1 scrubbing tower 2 air-introduced machine 3 scrubbing tower circulating pump 4 flash tank 5 venturi tower 6 reclaims water pot 7 recovered water pump 8 water circulating pump 9 heat exchanger 10 vacuum pump.
Detailed description of the invention
As it is shown in figure 1, a kind of system improving dry tail gas Water Sproading efficiency, this system includes scrubbing tower 1, flash tank 4, venturi tower 5, reclaims water pot 6, heat exchanger 9.Wherein: heat exchanger 9 refers to any one in plate type heat exchanger, shell-and-tube heat exchanger, spiral heat exchanger.
The side of scrubbing tower 1 is respectively equipped with dry tail gas input pipe, water inlet pipe, is dried tail gas outlet tube, and its top is connected with the bottom of flash tank 4 by pipeline I, is connected with pipeline III by pipeline II scrubbed tower circulating pump 3 bottom it；It is dried tail gas outlet tube and is connected with dry tail gas line through air-introduced machine 2；The end of pipeline III is connected with flash tank 4, and the top of this flash tank 4 is connected with the top of venturi tower 5 by pipeline IV；The side of venturi tower 5 is provided with pipeline V, and its opposite side is respectively equipped with pipeline VI, pipeline VII, is provided with pipeline VIII bottom it；The most recovered water pot of pipeline V 6, recovered water pump 7 are connected with recycle-water pipeline；One end of pipeline VI is connected with the shower nozzle pipeline in venturi tower 5, and its other end is connected with pipeline VIII through heat exchanger 9, water circulating pump 8 successively；Pipeline VII is connected with vent line through vacuum pump 10；The side of heat exchanger 9 is respectively equipped with cooling circulating water return piping, cooling circulating water water-line.
This raising is dried the systematic difference method of tail gas Water Sproading efficiency, comprises the following steps:
(1) washings enter scrubbing tower 1 by water inlet pipe, simultaneously, temperature is that the dry tail gas drying tail gas input pipe of 90 ~ 200 DEG C enters scrubbing tower 1, and carries out counter current contacting mass transfer, heat transfer with washings, respectively obtains the dry tail gas after washing, temperature is the washings of 60 ~ 80 DEG C；Dry tail gas after washing passes sequentially through dry tail gas outlet tube, air-introduced machine 2 drying exhaust pipe enters into follow-up system and is circulated use；
(2) temperature is that the washings scrubbed tower circulating pump 3 of 60 ~ 80 DEG C enters flash tank 4, and flash distillation occurs under conditions of pressure is 0.0074 ~ 0.0096MPaA, respectively obtains lime set and steam that temperature is 40 ~ 45 DEG C；Lime set enters in scrubbing tower 1 and recycles as washings；
(3) temperature is that the steam of 40 ~ 45 DEG C enters venturi tower 5 through pipeline IV, simultaneously, cooling water enters in venturi tower 5 through heat exchanger 9, pipeline VI from cooling circulating water water-line successively, after this cooling water carries out injection to the steam that temperature is 40 ~ 45 DEG C, respectively obtains condensed fluid and not condensing；Condensing does not enters vent line through vacuum pump 10；
(4) the part in condensed fluid passes sequentially through recovery water pot 6, the recovered water pipeline of recovered water pump 7 enters into follow-up operation, and remainder uses as injection water the most successively in water circulating pump 8, heat exchanger 9, pipeline VI enter venturi tower 5.
Claims (3)
1. one kind is improved the system being dried tail gas Water Sproading efficiency, it is characterised in that: this system includes scrubbing tower (1), flash tank (4), venturi tower (5), reclaims water pot (6), heat exchanger (9)；The side of described scrubbing tower (1) is respectively equipped with dry tail gas input pipe, water inlet pipe, is dried tail gas outlet tube, and its top is connected with the bottom of described flash tank (4) by pipeline I, is connected with pipeline III by pipeline II scrubbed tower circulating pump (3) bottom it；Described dry tail gas outlet tube is connected with dry tail gas line through air-introduced machine (2)；The end of described pipeline III is connected with described flash tank (4), and the top of this flash tank (4) is connected with the top of described venturi tower (5) by pipeline IV；The side of described venturi tower (5) is provided with pipeline V, and its opposite side is respectively equipped with pipeline VI, pipeline VII, is provided with pipeline VIII bottom it；Described pipeline V is connected with recycle-water pipeline through described recovery water pot (6), recovered water pump (7) successively；One end of described pipeline VI is connected with the shower nozzle pipeline in described venturi tower (5), and its other end is connected with described pipeline VIII through described heat exchanger (9), water circulating pump (8) successively；Described pipeline VII is connected with vent line through vacuum pump (10)；The side of described heat exchanger (9) is respectively equipped with cooling circulating water return piping, cooling circulating water water-line.
A kind of system improving dry tail gas Water Sproading efficiency the most as claimed in claim 1, it is characterised in that: described heat exchanger (9) refers to any one in plate type heat exchanger, shell-and-tube heat exchanger, spiral heat exchanger.
A kind of systematic difference method improving dry tail gas Water Sproading efficiency the most as claimed in claim 1, comprises the following steps:
(1) washings enter described scrubbing tower (1) by described water inlet pipe, simultaneously, temperature is that the dry tail gas of 90 ~ 200 DEG C enters described scrubbing tower (1) through described dry tail gas input pipe, and carry out counter current contacting mass transfer, heat transfer with described washings, respectively obtain the dry tail gas after washing, temperature is the washings of 60 ~ 80 DEG C；Dry tail gas after described washing passes sequentially through described dry tail gas outlet tube, described air-introduced machine (2) enters into follow-up system through described dry tail gas line and is circulated use；
The most described temperature is that the washings of 60 ~ 80 DEG C enter described flash tank (4) through described scrubbing tower circulating pump (3), flash distillation occurs under conditions of pressure is 0.0074 ~ 0.0096MPaA, respectively obtains lime set and steam that temperature is 40 ~ 45 DEG C；Described lime set enters in described scrubbing tower (1) and recycles as washings；
The most described temperature is that the steam of 40 ~ 45 DEG C enters described venturi tower (5) through described pipeline IV, simultaneously, cooling water enters in described venturi tower (5) through described heat exchanger (9), described pipeline VI from described cooling circulating water water-line successively, after this cooling water carries out injection to the steam that described temperature is 40 ~ 45 DEG C, respectively obtain condensed fluid and not condensing；Described not condensing enters described vent line through described vacuum pump (10)；
A part in the most described condensed fluid passes sequentially through described recovery water pot (6), described recovered water pump (7) enters into follow-up operation through described recycle-water pipeline, and remainder uses as injection water the most successively in described water circulating pump (8), described heat exchanger (9), described pipeline VI enter described venturi tower (5).
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1258712A (en) * | 1998-12-30 | 2000-07-05 | 中国科学院广州能源研究所 | Biomass gasifying and purifying circular fluid-bed system |
| CN102128548A (en) * | 2010-01-12 | 2011-07-20 | 神华集团有限责任公司 | Method and equipment for purifying and recovering evaporated vapor obtained by drying coal |
| CN102199464A (en) * | 2010-03-24 | 2011-09-28 | 天华化工机械及自动化研究设计院 | Drying and water-recovering process of heat conduction coal by venturi injecting circulation of tail gas with low oxygen content |
| CN102995702A (en) * | 2011-09-17 | 2013-03-27 | 天华化工机械及自动化研究设计院有限公司 | Method for recovering water vapor evaporated by drying coal by utilizing vacuum condensing cooling method and equipment thereof |
| CN103245130A (en) * | 2012-02-14 | 2013-08-14 | 天华化工机械及自动化研究设计院有限公司 | Method for recycling heat and water in dried tail gas by heat pump working media and device of method |
| CN103900842A (en) * | 2014-03-22 | 2014-07-02 | 哈尔滨工程大学 | Self-suction-type Venturi water scrubber performance testing system |
-
2015
- 2015-01-13 CN CN201510015771.2A patent/CN104501568B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1258712A (en) * | 1998-12-30 | 2000-07-05 | 中国科学院广州能源研究所 | Biomass gasifying and purifying circular fluid-bed system |
| CN102128548A (en) * | 2010-01-12 | 2011-07-20 | 神华集团有限责任公司 | Method and equipment for purifying and recovering evaporated vapor obtained by drying coal |
| CN102199464A (en) * | 2010-03-24 | 2011-09-28 | 天华化工机械及自动化研究设计院 | Drying and water-recovering process of heat conduction coal by venturi injecting circulation of tail gas with low oxygen content |
| CN102995702A (en) * | 2011-09-17 | 2013-03-27 | 天华化工机械及自动化研究设计院有限公司 | Method for recovering water vapor evaporated by drying coal by utilizing vacuum condensing cooling method and equipment thereof |
| CN103245130A (en) * | 2012-02-14 | 2013-08-14 | 天华化工机械及自动化研究设计院有限公司 | Method for recycling heat and water in dried tail gas by heat pump working media and device of method |
| CN103900842A (en) * | 2014-03-22 | 2014-07-02 | 哈尔滨工程大学 | Self-suction-type Venturi water scrubber performance testing system |
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