CN209362161U - A kind of low-temperature flue gas waste heat recovering and purifying system of alumina roasting furnace - Google Patents

A kind of low-temperature flue gas waste heat recovering and purifying system of alumina roasting furnace Download PDF

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Publication number
CN209362161U
CN209362161U CN201822222632.9U CN201822222632U CN209362161U CN 209362161 U CN209362161 U CN 209362161U CN 201822222632 U CN201822222632 U CN 201822222632U CN 209362161 U CN209362161 U CN 209362161U
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smoke
flue gas
spray
column
spray tube
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白彦江
鱼洋
樊旭
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In Color Twelve Metallurgical Chongqing Energy Saving Technology Co Ltd
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In Color Twelve Metallurgical Chongqing Energy Saving Technology Co Ltd
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Abstract

The utility model proposes a kind of low-temperature flue gas waste heat recovering and purifying system of alumina roasting furnace, including power generation sub-system and purifying subsystem, power generation sub-system includes heat exchanger, evaporator, preheater, working medium pump and generating set;Purifying subsystem includes column for smoke purification, column for smoke purification is communicated with smoke-intake pipe, the stem of smoke-intake pipe is connected to the smoke outlet of heat exchanger, gas cleaning tower bottom is equipped with water tank, scavenging solution is equipped in water tank, water tank is also communicated with circulation pipe, circulation pipe is equipped with circulating pump, spray portion is equipped with above water tank, spray portion includes the first spray tube and the second spray tube, shunting funnel is also horizontally arranged in column for smoke purification, the side wall for shunting funnel is equipped with leak hole, and the top of column for smoke purification, which is equipped with, removes diamicton and smoke outlet.The heat that flue gas can first be absorbed generates electricity, then flue gas is divided into the flue gas of small thread shape, the dust and pernicious gas in purifying smoke, rationally utilizes resource, and environment is protected in energy-saving and emission-reduction.

Description

A kind of low-temperature flue gas waste heat recovering and purifying system of alumina roasting furnace
Technical field
The utility model relates to industry environmental protection technical fields, and in particular to a kind of low-temperature flue gas waste heat of alumina roasting furnace Recovering and purifying system.
Background technique
Aluminium, use scope and consumption figure are only second to steel, are the second largest metals.Along with science and technology progress, Aluminium and its alloy using more and more extensive, thus metallic aluminium is called 21 century metal again by people.Into over 10 years, China's aluminium work How phenomena such as industry development is swift and violent, but big in face of the roasting apparatus fuel heavy oil smell of aluminium oxide, energy consumption is high, pollution environment, have Effect ground rationally utilizes the flue gas generated in alumina producing process, to have the function that energy-saving and emission-reduction, becomes industry Problem.
Utility model content
The utility model aims to solve at least the technical problems existing in the prior art, especially innovatively proposes a kind of oxygen Change the low-temperature flue gas waste heat recovering and purifying system of aluminium roaster, rationally to carry out energy conservation using low-temperature flue gas, and reduces to environment Pollution.
In order to realize the above-mentioned purpose of the utility model, the utility model provides a kind of low temperature cigarette of alumina roasting furnace Gas waste heat recovering and purifying system, including power generation sub-system and purifying subsystem, the power generation sub-system include and baking furnace fume The heat exchanger of the smoke outlet connection of general pipeline, the heat source water inlet of the high temperature feed water inlet connection evaporator of the heat exchanger, the steaming Send out the heat source water inlet of the heat source water outlet connection preheater of device, the low temperature of the heat source water outlet connection heat exchanger of the preheater Water return outlet, the sender property outlet of the working medium inlet communication working medium pump of the preheater, the sender property outlet and evaporator of the preheater Working medium import be connected, the sender property outlet of the evaporator is communicated to the working medium import of generating set, the work of the generating set Matter exports the working medium import for being connected to condenser, and the sender property outlet of the condenser is connected to the sender property outlet of working medium pump;
The purifying subsystem includes column for smoke purification, and the column for smoke purification is communicated with smoke-intake pipe, the smoke-intake pipe Stem is connected to the smoke outlet of heat exchanger, and the gas cleaning tower bottom is equipped with the water tank of upper opening shape, is equipped in the water tank Scavenging solution, the water tank are also communicated with circulation pipe, and the circulation pipe is equipped with circulating pump, and the water tank top is equipped with and circulation pipe The spray portion of connection, the spray portion include the first spray tube and the second spray tube, and first spray tube, which spirals, to be arranged in cigarette On gas purifying column inner sidewall, second spray tube extends to the middle part of column for smoke purification, first spray tube and the second spray Several spray heads are equipped in shower pipe, second spray tube is located at the top of the first spray tube, and on second spray tube Spray head is sprinkler tip;Spray head on first spray tube is atomizer, is also horizontally arranged in the column for smoke purification Funnel is shunted, for the shunting funnel between water tank and spray portion, the side wall for shunting funnel is equipped with leak hole, the spray It is equipped with above leaching portion and removes diamicton, the top of the column for smoke purification is equipped with smoke outlet.
Heat exchanger is used to recycle the thermal energy of flue gas in baking furnace fume general pipeline, hot water is generated, as heat source driven generator Group power generation.Working medium pump is used to provide the pressure of flowing for working medium, and working medium successively passes through preheater under the pressure-driven of working medium pump And evaporator, gaseous working medium is formed by hot water heating, into generating set and the acting power generation of pushing generator group, through generating set Condenser is gone successively to after discharge, is condensed into liquid refrigerant through condenser, is returned to working medium pump and is continued cycling through, is completed with this to flue gas The power generation of thermal energy acts on.
Smoke-intake pipe is for introducing flue gas into column for smoke purification.Water tank is used for for holding with collection and purification liquid, circulating pump Purification liquid pump is sprayed scavenging solution into spray woods system, then through spray head, scavenging solution is fallen under the effect of gravity to be leaked in shunting On bucket, fall in recovery tank through collection funnel, the circulation to scavenging solution is realized with this.The leak hole on funnel is shunted to be used for flue gas point The flue gas of one one thread of thread of chemical conversion, realizes the shunting to flue gas with this.In the process that scavenging solution is flowed from the side wall for shunting funnel In can also tentatively wash off impurity in flue gas and water-soluble pernicious gas, then flue gas with the smoke contacts passed through from leak hole Rise, the scavenging solution that spray head sprays is used for sufficiently in conjunction with flue gas, fully absorbs the impurity and pernicious gas in flue gas.Except diamicton For absorbing remaining moisture, impurity and pernicious gas in flue gas.
In above scheme: first spray tube is equipped with atomizer.Misty scavenging solution can be sprayed, it is small in size, just It is merged in flue gas, the impurity and pernicious gas in flue gas can be fully absorbed.
In above scheme: the side wall for shunting funnel is corrugated.Collector groove can be formed by the lower of corrugated, just It is flowed in scavenging solution.
In above scheme: the beginning of the circulation pipe is equipped with filter screen.It is miscellaneous by dust in filter screen filtration water tank etc. Matter avoids the blocking that spray portion is caused due to impurity.
In above scheme: the tail end of the smoke-intake pipe extends to the underface for shunting funnel lower port, and the smoke-intake pipe Tail end be scarf, wherein be longer than on the upside of smoke-intake pipe downside.Flue gas can be broken up by shunting the water flow in funnel, Further achieve the effect that break up flue gas.
In above scheme: described except diamicton is active carbon layer.The adsorption effect of active carbon is good, and material is easy to get, at low cost.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are: hair can be passed through first The heat that electronic system absorbs flue gas generates electricity, and avoids improving environment temperature, rationally utilizes the thermal energy of flue gas, moreover it is possible to reduce heat Damage of the gas to follow-up equipment, then by the impurity of pernicious gas, dust in purifying subsystem processing flue gas, reduction is produced into This, reduces dust emission, protects social environment, energy-saving and emission-reduction;Flue gas is divided into the flue gas of small thread shape by shunting funnel, just In scavenging solution and smoke contacts, avoid excessively concentrating due to flue gas cause to purify it is insufficient.
Detailed description of the invention
The above-mentioned and/or additional aspect and advantage of the utility model from the description of the embodiment in conjunction with the following figures will Become obvious and be readily appreciated that, in which:
Fig. 1 is the system diagram of the utility model;
Fig. 2 is the structural schematic diagram of the column for smoke purification of the utility model;
Fig. 3 is the top view of the shunting funnel of the utility model.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and should not be understood as to the utility model Limitation.
As shown in Figure 1-Figure 3, the low-temperature flue gas waste heat recovering and purifying system of a kind of alumina roasting furnace, including power generation subsystem System and purifying subsystem, the power generation sub-system includes the heat exchanger 11 being connected to the smoke outlet of baking furnace fume general pipeline 1, described The heat source water inlet of the high temperature feed water inlet connection evaporator 12 of heat exchanger 11, the heat source water outlet of the evaporator 12 are connected to preheating The heat source water inlet of device 16, the low-temperature return water mouth of the heat source water outlet connection heat exchanger 11 of the preheater 16, the preheater The sender property outlet of 16 working medium inlet communication working medium pump 15, the working medium import of the sender property outlet and evaporator 12 of the preheater 16 It is connected, the sender property outlet of the evaporator 12 is communicated to the working medium import of generating set 13, and the working medium of the generating set 13 goes out Mouth is connected to the working medium import of condenser 14, and the sender property outlet of the condenser 14 is connected to the sender property outlet of working medium pump 15;
The purifying subsystem includes column for smoke purification 5, and the column for smoke purification 5 is communicated with smoke-intake pipe 51, described into cigarette The stem of pipe 51 is connected to the smoke outlet of heat exchanger 11, and 5 bottom of column for smoke purification is equipped with the water tank 2 of upper opening shape, described Scavenging solution is equipped in water tank 2, the water tank 2 is also communicated with circulation pipe 33, and the beginning of the circulation pipe 33 is equipped with filter screen 31, leads to The impurity such as the dust in 31 water tank with strainer 2 of filter screen are crossed, the blocking for causing spray portion due to impurity is avoided.On the circulation pipe 33 Equipped with circulating pump 32, the spray portion being connected to circulation pipe 33 is equipped with above the water tank 2, the spray portion includes the first spray tube 35 and second spray tube 34, first spray tube 35, which spirals, to be arranged on 5 inner sidewall of column for smoke purification, second spray tube 34 extend to the middle part of column for smoke purification 5, are equipped with several spray heads on first spray tube 35 and the second spray tube 34, described Second spray tube 34 is located at the top of the first spray tube 35, and the spray head on second spray tube 34 is sprinkler tip 36;Institute It states the first spray tube 35 and is equipped with atomizer 37, the spray head on first spray tube 35 is atomizer, can spray mist Scavenging solution, it is small in size, convenient for merging with flue gas, the impurity such as the dust in flue gas and pernicious gas can be fully absorbed.It is described It is equipped with above spray portion and removes diamicton 4, it is described except diamicton 4 is active carbon layer, except diamicton 4 is used to adsorb the moisture and remnants in flue gas Impurity, pernicious gas etc., the top of the column for smoke purification 5 is equipped with smoke outlet 52.
It is also horizontally arranged in the column for smoke purification 5 and shunts funnel 6, the shunting funnel 6 is located at water tank 2 and spray portion Between, the side for shunting 6 larger caliber of funnel is located at upside, and the side wall for shunting funnel 6 is equipped with leak hole 62, described The side wall for shunting funnel 6 is corrugated, can form collector groove 61 by the lower of corrugated, collect convenient for scavenging solution, flows.Institute The tail end 511 for stating smoke-intake pipe 51 extends to the underface for shunting 6 lower port of funnel, can be dropped out by shunting the lower port of funnel Scavenging solution and smoke contacts, further purifying smoke, while flue gas can also be broken up, and the tail end 511 of the smoke-intake pipe 51 is Scarf, wherein the upside of smoke-intake pipe 51 is longer than downside, and upper side edge can stop flue gas directly to rise, and from the right side in Fig. 2 Or front and rear sides discharge, the effect of dispersion discharge flue gas can be further increased.
150 DEG C of low-temperature flue gas is fired kiln gas general pipeline 1 and is discharged into the recycling heat of heat exchanger 11, with heating heat exchanger Intranet water in 11 is to 80 DEG C~120 DEG C, and Intranet water passes sequentially through evaporator 12 and preheater 16 again, and working medium is in working medium pump 15 Preheater 16 and evaporator 12 are sequentially entered under driving, working medium is preheated after entering preheater 16 with the heat exchange of Intranet water, then into Enter to be formed steam in evaporator 12 and is drained into generating set 13, the acting power generation of pushing generator group 13.Through generating set 13 Enter the condensation of condenser 14 after discharge to form liquid refrigerant and return to working medium pump 15, continues cycling through, completed with this to flue gas heat Recycling power generation effect.
Flue gas through heat exchanger 1111 heat absorption after temperature be reduced to 100 DEG C or so, from smoke-intake pipe 51 enter column for smoke purification into Row purification.After flue gas enters in column for smoke purification, the leak hole for first passing through shunting funnel is shunted, and forms the dispersion of one thread of thread Flue gas comes into full contact with the misty scavenging solution for being atomized ejection from the first spray tube 35, and misty scavenging solution is allowed to adsorb in flue gas Dust and pernicious gas.The drops scavenging solution formed again by the sprinkle water and spray on the second spray tube 34 carries out flue gas secondary Exhaustionization the case where can not adsorbing to avoid the excessive and misty scavenging solution of part dust, improves clean-up effect.Simultaneously, moreover it is possible to logical It crosses drops scavenging solution to collect with misty scavenging solution, to take away the misty scavenging solution being mingled in flue gas, reduces scavenging solution and take out of.
Scavenging solution is fallen when on the shunting funnel of corrugated by gravity, can be converged by shunting the collector groove on funnel Collection, and dropped out from the lower port for shunting funnel, it then falls into water tank 2, then liquid pump will be purified to the first spray by circulating pump 32 At shower pipe 35 and the second spray tube 34, the circulation of scavenging solution is completed.Scavenging solution can break up flue gas when dropping out from lower port, avoid Flue gas is excessively concentrated and leads to scavenging solution and the insufficient situation of smoke contacts.The protrusion that shunts funnel of the scavenging solution from corrugated Rib falls can further increase net when flowing at collector groove by leak hole, so as to contact with each other with the flue gas passed through from leak hole Change contact of the liquid with flue gas, to improve clean-up effect.
While there has been shown and described that the embodiments of the present invention, it will be understood by those skilled in the art that: These embodiments can be carried out with a variety of variations, modification, replacement in the case where not departing from the principles of the present invention and objective And modification, the scope of the utility model are defined by the claims and their equivalents.

Claims (6)

1. a kind of low-temperature flue gas waste heat recovering and purifying system of alumina roasting furnace, it is characterised in that: including power generation sub-system and Purifying subsystem, the power generation sub-system includes the heat exchanger (11) being connected to the smoke outlet of baking furnace fume general pipeline (1), described The heat source water outlet of the heat source water inlet of high temperature feed water inlet connection evaporator (12) of heat exchanger (11), the evaporator (12) connects The heat source water inlet of logical preheater (16), the low-temperature return water of heat source water outlet connection heat exchanger (11) of the preheater (16) Mouthful, the sender property outlet of the working medium inlet communication working medium pump (15) of the preheater (16), the sender property outlet of the preheater (16) Be connected with the working medium import of evaporator (12), the sender property outlet of the evaporator (12) be communicated to the working medium of generating set (13) into Mouthful, the sender property outlet of the generating set (13) is connected to the working medium import of condenser (14), the working medium of the condenser (14) Outlet is connected to the sender property outlet of working medium pump (15);
The purifying subsystem includes column for smoke purification (5), and the column for smoke purification (5) is communicated with smoke-intake pipe (51), it is described into The stem of smoke pipe (51) is connected to the smoke outlet of heat exchanger (11), and column for smoke purification (5) bottom is equipped with the water of upper opening shape Case (2), the water tank (2) are provided with scavenging solution, and the water tank (2) is also communicated with circulation pipe (33), on the circulation pipe (33) Equipped with circulating pump (32), the spray portion being connected to circulation pipe (33) is equipped with above the water tank (2), the spray portion includes first Spray tube (35) and the second spray tube (34), first spray tube (35), which is spiraled, to be arranged on column for smoke purification (5) inner sidewall, Second spray tube (34) extends to the middle part of column for smoke purification (5), first spray tube (35) and the second spray tube (34) several spray heads are equipped on, second spray tube (34) is located at the top of the first spray tube (35), and second spray Spray head in shower pipe (34) is sprinkler tip (36);Spray head on first spray tube (35) is atomizer, the flue gas It is also horizontally arranged in purifying column (5) and shunts funnel (6), the shunting funnel (6) is located between water tank (2) and spray portion, institute The side wall for shunting funnel (6) is stated equipped with leak hole (62), the spray portion top, which is equipped with, removes diamicton (4), the column for smoke purification (5) top is equipped with smoke outlet (52).
2. a kind of low-temperature flue gas waste heat recovering and purifying system of alumina roasting furnace according to claim 1, feature exist In: first spray tube (35) is equipped with atomizer (37).
3. a kind of low-temperature flue gas waste heat recovering and purifying system of alumina roasting furnace according to claim 1, feature exist In: the side wall for shunting funnel (6) is corrugated.
4. a kind of low-temperature flue gas waste heat recovering and purifying system of alumina roasting furnace according to claim 1, feature exist In: the beginning of the circulation pipe (33) is equipped with filter screen (31).
5. a kind of low-temperature flue gas waste heat recovering and purifying system of alumina roasting furnace according to claim 3, feature exist In: the tail end (511) of the smoke-intake pipe (51) extends to the underface of shunting funnel (6) lower port, and the smoke-intake pipe (51) Tail end (511) be scarf, wherein be longer than on the upside of smoke-intake pipe (51) downside.
6. a kind of low-temperature flue gas waste heat recovering and purifying system of alumina roasting furnace according to claim 2, feature exist In: it is described except diamicton (4) are active carbon layer.
CN201822222632.9U 2018-12-27 2018-12-27 A kind of low-temperature flue gas waste heat recovering and purifying system of alumina roasting furnace Active CN209362161U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112076578A (en) * 2020-09-15 2020-12-15 苏州兰晶电力设备有限公司 Combustion furnace purification device
CN112377940A (en) * 2020-11-09 2021-02-19 山东岱荣节能环保科技有限公司 Purification system for recycling waste heat of flue gas
CN112393627A (en) * 2020-10-30 2021-02-23 南京焓能环保科技有限公司 Low-temperature dew point corrosion resistant waste heat recovery device of suspension roasting furnace

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112076578A (en) * 2020-09-15 2020-12-15 苏州兰晶电力设备有限公司 Combustion furnace purification device
CN112393627A (en) * 2020-10-30 2021-02-23 南京焓能环保科技有限公司 Low-temperature dew point corrosion resistant waste heat recovery device of suspension roasting furnace
CN112377940A (en) * 2020-11-09 2021-02-19 山东岱荣节能环保科技有限公司 Purification system for recycling waste heat of flue gas

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