CN104743590B - The solid polyaluminium chloride reaction unit of environment-protecting clean - Google Patents
The solid polyaluminium chloride reaction unit of environment-protecting clean Download PDFInfo
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Abstract
The invention discloses a kind of solid polyaluminium chloride reaction unit of environment-protecting clean, including single step reaction system, two step reaction systems, roller drying system, slag treatment system and tail gas absorbing system；The single step reaction system includes reaction tank, reaction tank transfer pond, flocculating agent formulation tank I, main filter press and a step liquid pool, the two steps reaction system includes quenched pond, quenched Chi Zhongzhuanchi, cooling tower, separate tank, separate slag saving pond, flocculating agent formulation tank II and semi-finished product pond, the roller drying system includes drying liquid gravity tank, drying drum and finished belt conveyer, the slag treatment system includes slag kitchen sink, slag filter press, slag dryer and wastewater disposal basin, the tail gas absorbing system includes tail gas absorber and the gas skirt being arranged on above main filter press.The present invention separates the insoluble matter produced in production by coagulating sedimentation, and also the filter residue, waste water and waste gas that are produced in production process are handled and comprehensively utilized.
Description
Technical field
The invention belongs to polyaluminium chloride production technical field, it is related to a kind of solid polyaluminium chloride reaction dress of environment-protecting clean
Put.
Background technology
Polyaluminium chloride, is commonly called as water purification agent, also known as aluminium polychloride, abbreviation poly-aluminium, english name PAC；It is a kind of polyhydroxy
Base, multinuclear are complexed the cationic inorganic polymer flocculant of body, and solid product outward appearance is bronzing, yellow or white solid powder
End, its chemical molecular formula is [AL2(OH)nCL6-n]m(in formula, 1≤n≤5, m≤10), wherein m represents extent of polymerization, and n is represented
The neutral degree of PAC products, it is soluble in water, there is stronger bridge formation adsorptivity, with electrochemistry, cohesion, suction in hydrolytic process
The physico changes such as precipitation are echoed, [AL is ultimately generated2(OH)3(OH)3], so as to reach purification purpose.
The fundamental difference of polyaluminium chloride and traditional inorganic coagulant is that traditional inorganic coagulant is low molecule crystal salt, and
The structure of polyaluminium chloride is made up of the changeable polycarboxy complex compound of form, and flocculation sediment speed is fast, and applicable pH range is wide, right
Pipe-line equipment non-corrosiveness, purifying water effect substantially, can effectively branch water removal in the heavy metal such as chromaticness SS, COD, BOD and arsenic, mercury from
Son, the product is widely used in drinking water, industrial water and sewage treatment area.
Polyaluminium chloride is divided into form and is divided into two kinds：A. liquid polyaluminium chloride is undried form, is had without dilution, dress
The relatively cheap advantage of easy to use, price is unloaded, has the disadvantage that transport needs tank car, unit cost increase（Solid phase per ton
When in 2-3 tons of liquid）；B. solid polyaluminium chloride is dried form, has the advantages that convenient transportation, it is not necessary to tank car, shortcoming
It is that dilution is also needed to when using, increases working strength.
The raw material of production polyaluminium chloride mainly has two major classes：One class is aluminum-containing mineral, including bauxite（Gibbsite, one
Boehmite, diaspore）, clay, kaolin, alunite etc.；Another kind of is other aluminum-containing raw materials, including metallic aluminium, useless
Aluminium skimmings, grey aluminium, aluminium hydroxide, alchlor, gangue, flyash etc..The method of production polyaluminium chloride mainly has metal at present
Aluminium（Including aluminium ash, lead skim）Method, active aluminium hydroxide method, alundum (Al2O3)（Including bauxite, gangue etc.）Method, crystallization chlorination
Aluminium method etc..
1. metallic aluminium method：The raw material for synthesizing polyaluminium chloride using metallic aluminium method is mainly the leftover bits and pieces of aluminium processing, such as aluminium
Bits, aluminium ash and aluminium slag etc..Hydrochloric acid is added slowly with stirring according to a certain ratio by aluminium ash to be reacted, through curing polymerization, sedimentation
Liquid aluminium polychloride is made, then through dilute filtration, concentration is dried and is made.Acid system, alkaline process, neutralisation 3 can be divided into technique
Kind.Acid system, which is mainly, uses HCl, and product quality is difficult to control；Alkaline process producting process difficulty is higher, and equipment investment is larger and alkali charge
Greatly, pH controls take raw material, and cost is higher；Most is neutralisation, as long as controlling proportioning, is typically attained by national mark
It is accurate.
2. aluminium hydroxide method
Aluminium hydroxide powder purity is higher, and the levels of toxic substances such as polyaluminium chloride heavy metal of synthesis is low, and general use adds
The molten production technology of heat pressurization acid.This technics comparing is simple, but the basicity of the aluminium polychloride of production is relatively low, therefore typically
Added using aluminium hydroxide temperature-pressure acid is molten in calcium aluminate miberal powder and two procedures.
3. alundum (Al2O3) method
Raw material containing alundum (Al2O3) mainly has gibbsite, aluminium vanadine, kaolin, gangue etc..The production technology can
It is divided into two steps：The first step is to obtain crystal aluminum chloride, and second step is to obtain polyaluminium chloride by pyrolysismethod or neutralisation.
4. Alchlor process
Chlorination aluminium powder is used for Raw material processing polyaluminium chloride, this method application is the most universal.Can with crystal aluminum chloride in
170 DEG C of progress boiling pyrolysis, add water curing polymerization, then cured, dries and is made.
The solid polyaluminium chloride reaction unit being completed at present, majority is that bauxite and calcium aluminate two-step method production liquid gather
Aluminium chloride, then by liquid polyaluminium chloride with spray drying or device that roller drying is solid polyaluminium chloride.Existing solid gathers
The following shortcoming of aluminium reaction device generally existing：
1）In the molten reaction of first step acid and second step polymerisation, it can all produce a large amount of insoluble matters and be difficult to and reaction solution point
From causing insoluble matter severe overweight in final solid polyaluminium chloride product；
2）The roller drying system used, flow setting is not reasonable, causes energy consumption for drying cost too high, and by rolling
The transportation processing for the solid polyaluminium chloride that cylinder is dried is also more time-consuming；
3）For the processing and comprehensive utilization of filter residue, waste water and processing and comprehensive utilization containing sour waste gas and energy-conservation drop
The problems such as consumption, environment-protecting clean are produced is no to be dealt carefully with.
The content of the invention
In view of this, it is an object of the invention to provide a kind of solid polyaluminium chloride reaction unit of environment-protecting clean, effectively
Insolubles content in control and reduction reaction solution, improves the yield and quality of final solid polyaluminium chloride product, and to life
The integrated treatments such as the various filter residues, waste water, the waste gas that are produced during production and recycling, make the production section of solid polyaluminium chloride
Can consumption reduction, environment-protecting clean.
To reach above-mentioned purpose, the present invention provides following technical scheme：
The present invention environment-protecting clean solid polyaluminium chloride reaction unit, including single step reaction system, two step reaction systems,
Roller drying system, slag treatment system and tail gas absorbing system；
The single step reaction system includes reaction tank, reaction tank transfer pond, flocculating agent formulation tank I, main filter press and a step
Liquid pool, the reaction tank is provided with bauxite charge door and acid solution charge door, and reaction tank is connected with reaction tank transfer pond, flocculant
Preparing tank I is connected with reaction tank transfer pond, and reaction tank transfer pond is connected by the muddy material pump of a step liquid with the entrance of main filter press, main
The liquid outlet of filter press is connected with a step liquid pool；
The two steps reaction system includes quenched pond, quenched Chi Zhongzhuanchi, cooling tower, separate tank, separation slag saving pond, wadding
Solidifying agent preparing tank II and semi-finished product pond, the step liquid pool is connected by a step liquid delivery pump with quenched pond, on the quenched pond
Provided with calcium aluminate charge door, quenched pond is connected with quenched Chi Zhongzhuanchi, and quenched Chi Zhongzhuanchi passes through quenched liquid delivery pump and cooling
The entrance connection of tower, the outlet of cooling tower is connected with separate tank, and flocculating agent formulation tank II is connected with separate tank, the top of separate tank
Connected with semi-finished product pond, the bottom of separate tank with separate slag saving pond connection, separation slag saving pond by separate slag delivery pump with
Reaction tank is connected；
The roller drying system includes drying liquid gravity tank, drying drum and finished belt conveyer, the semi-finished product
Pond is connected by semi-finished product liquid pump with drying liquid gravity tank, is dried liquid gravity tank and is connected with the drying liquid entrance of drying drum, is done
The solid outlet of dry roller is just to finished belt conveyer；
The slag treatment system includes slag kitchen sink, slag filter press, slag dryer and wastewater disposal basin, the main filter press
Filter-press residues outlet is connected with slag kitchen sink, and the slag kitchen sink is connected by washed-residue delivery pump with the entrance of slag filter press, slag
The filter-press residues outlet of filter press is connected with slag dryer, and the liquid outlet of slag filter press is connected with wastewater disposal basin, and wastewater disposal basin passes through useless
Water pump is connected with reaction tank and quenched pond respectively；
The tail gas absorbing system includes tail gas absorber and the gas skirt being arranged on above main filter press, and the tail gas is inhaled
The exhaust gas entrance for receiving tower is connected with the exhaust steam passage at the top of reaction tank, reaction tank transfer pond, quenched pond and gas skirt respectively, described
The absorbing liquid entrance of tail gas absorber is connected with tap water pipe network, and the absorbing liquid outlet of tail gas absorber is connected with wastewater disposal basin.
Further, the reaction tank, reaction tank transfer pond and flocculating agent formulation tank I are equipped with agitator, the step liquid
The quantity of muddy material pump is two and parallel with one another, and the quantity of the main filter press is three and parallel with one another, the step liquid pool
Quantity be four and parallel with one another.
Further, the quenched pond, separate tank, separation slag saving pond and flocculating agent formulation tank II are equipped with agitator, institute
Cooling tower is stated for the cooling tower provided with air-introduced machine.
Further, the quantity of the drying drum is 20 and parallel with one another, and the drying drum is provided with high-altitude steam
Discharge tube, the quantity of the semi-finished product liquid pump is for two and parallel with one another.
Further, the filter-press residues outlet of the main filter press is connected by belt conveyor with slag kitchen sink, the slag pressure
The filter-press residues outlet of filter is connected by belt conveyor with slag dryer, and the slag kitchen sink is provided with agitator, the slag pressure
The quantity of filter is two and parallel with one another, and the wastewater disposal basin is connected with tap water pipe network.
The beneficial effects of the present invention are：
1）The present invention sets flocculating agent formulation tank, filter press and separation in single step reaction system and two step reaction systems
The devices such as pond, separate the insoluble matter produced in production by coagulating sedimentation, improve the production of final solid polyaluminium chloride product
Amount and quality；
2）The present invention, which is provided with, dries liquid gravity tank, is first pumped into liquid polyaluminium chloride and dries in liquid gravity tank, by drying
Liquid gravity tank is distributed feed liquid and carries out high temperature dehydration drying to each drying drum, so as to be reached with being concisely and efficiently technological process
The purpose of uniform distribution, reduces energy consumption for drying cost；
3）The present invention is also provided with the finished belt conveyer being engaged with drying drum, by finished belt conveyer certainly
Dynamic to collect conveying solid substance polyaluminium chloride, that has saved solid polyaluminium chloride transports cost；
4）Slag treatment system and tail gas absorbing system is set to carry out the filter residue, waste water and waste gas that are produced in production process
Processing and comprehensive utilization, have saved the means of production, have reduced discharge, have reached the purpose of environment-protecting clean production.
Brief description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below and carried out
Explanation：
Fig. 1 is the structural representation of single step reaction system；
Fig. 2 is the structural representation of two step reaction systems；
Fig. 3 is the structural representation of roller drying system；
Fig. 4 is the structural representation of slag treatment system；
Fig. 5 is the structural representation of tail gas absorbing system.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
The present invention environment-protecting clean solid polyaluminium chloride reaction unit, including single step reaction system, two step reaction systems,
Roller drying system, slag treatment system and tail gas absorbing system.
Fig. 1 is the structural representation of single step reaction system, as illustrated, single step reaction system includes reaction tank 11, reaction
Pond transfer pond 12, flocculating agent formulation tank I 13, the step liquid pool 15 of main filter press 14 and one, the reaction tank 11 add provided with bauxite
Material mouth and acid solution charge door, reaction tank 11 are connected with reaction tank transfer pond 12, flocculating agent formulation tank I 13 and reaction tank transfer pond 12
Connection, reaction tank transfer pond 12 is connected by the muddy material pump 16 of a step liquid with the entrance of main filter press 14, the liquid of main filter press 14
Outlet is connected with a step liquid pool 15；The reaction tank 11, reaction tank transfer pond 12 and flocculating agent formulation tank I 13 are equipped with stirring
Device, the quantity of the muddy material pump 16 of step liquid is for two and parallel with one another, and the quantity of the main filter press 14 is for three and mutual
Parallel connection, the quantity of the step liquid pool 15 is for four and parallel with one another.Hydrochloric acid and technique waste water are added into reaction tank 11, then
The bauxite of formula ratio is put into, heating response, reaction product takes gravity flow mode to be put into reaction tank transfer pond 12, pass through flocculation
Agent preparing tank I 13 adds poly- propionamide flocculant flocculation, is then pumped into by the muddy material pump 16 of a step liquid in main filter press 14, will be anti-
Pond product is answered to carry out slag-liquid separation, the step liquid pump isolated enters in a step liquid pool 15, the slag kitchen sink that removes slag carries out subsequent treatment.
Fig. 2 is the structural representation of two step reaction systems, as illustrated, two step reaction systems include quenched pond 21, quenched
Pond transfer pond 22, cooling tower 23, separate tank 24, separation slag saving pond 25, flocculating agent formulation tank II 26 and semi-finished product pond 27, it is described
One step liquid pool 15 is connected by a step liquid delivery pump 28 with quenched pond 21, and the quenched pond 21 is provided with calcium aluminate charge door, is adjusted
Matter pond 21 is connected with quenched pond transfer pond 22, and quenched pond transfer pond 22 is connected by the entrance of quenched liquid delivery pump 29 and cooling tower 23
Logical, the outlet of cooling tower 23 is connected with separate tank 24, and flocculating agent formulation tank II 26 is connected with separate tank 24, the top of separate tank 24
Connected with semi-finished product pond 27, the bottom of separate tank 24 is connected with separating slag saving pond 25, separation slag saving pond 25 is by separating slag
Delivery pump 20 is connected with reaction tank 11；The quenched pond 21, separate tank 24, separation slag saving pond 25 and flocculating agent formulation tank II 26
Agitator is equipped with, the cooling tower 23 is the cooling tower provided with air-introduced machine.A step liquid pump is entered by a step liquid delivery pump 28
The reaction of formula ratio calcium aluminate is progressively put into quenched pond 21, under stirring condition, after the completion of reaction, material is in cooling tower 23 through sky
After air cooling, added into separate tank 24 after flocculant carries out flocculation separation, quiescent settling and supernatant is put into semi-finished product pond 27
In；Flocculation separation slag is pumped into reaction tank 11 from separation slag saving pond 25, and the slag in question response pond 11 reaches that process stipulation is disposed
During amount, formula ratio hydrochloric acid, sulfuric acid and water reaction are added, after the completion of slag reaction, material is entered in reaction tank by previous process flow
Turn pond 12 and carry out flocculation separation.
Fig. 3 is the structural representation of roller drying system, as illustrated, roller drying system includes drying liquid gravity tank
31st, drying drum 32 and finished belt conveyer 33, the semi-finished product pond 27 is by semi-finished product liquid pump 34 with drying liquid gravity tank
31 connections, dry liquid gravity tank 31 and are connected with the drying liquid entrance of drying drum 32, the solid outlet of drying drum 32 just into
Product belt conveyor 33；The quantity of the drying drum 32 is 20 and parallel with one another, and the drying drum 32 is provided with high-altitude
Vapor discharge channel 35, the quantity of the semi-finished product liquid pump 34 is for two and parallel with one another.Semi-finished product liquid in semi-finished product pond 27
It is pumped into by semi-finished product liquid pump 34 and dries liquid gravity tank 31, be distributed feed liquid by dry liquid gravity tank 31 enters to each drying drum 32
Row high temperature dehydration is dried, and is conveyed by the solid polyaluminium chloride of roller drying by finished belt conveyer 33.
Fig. 4 is the structural representation of slag treatment system, as illustrated, slag treatment system includes slag kitchen sink 41, slag
Filter press 42, slag dryer 43 and wastewater disposal basin 44, the filter-press residues outlet of the main filter press 14 are connected with slag kitchen sink 41, described
Slag kitchen sink 41 is connected by washed-residue delivery pump 45 with the entrance of slag filter press 42, the filter-press residues outlet of slag filter press 42 and slag
Dryer 43 is connected, and the liquid outlet of slag filter press 42 is connected with wastewater disposal basin 44, wastewater disposal basin 44 by waste water pump 46 respectively with instead
Pond 11 is answered to be connected with quenched pond 21；The filter-press residues outlet of the main filter press 14 is connected by belt conveyor with slag kitchen sink 41
Logical, the filter-press residues outlet of the slag filter press 42 is connected by belt conveyor with slag dryer 43, and the slag kitchen sink 41 is set
There is agitator, the quantity of the slag filter press 42 is for two and parallel with one another, and the wastewater disposal basin 44 is connected with tap water pipe network.It is main
Filter-press residues enter slag kitchen sink 41 after the press filtration of filter press 14, using press filtration again after fresh water wash to neutrality, finally enter slag
Dryer 43 is taken out after waste heat boiler steam drying, and slag washes is merged into after wastewater disposal basin 44 with tail gas absorption waste water and sent into
Reaction tank 11 and quenched pond 21 are applied mechanically.
Fig. 5 is the structural representation of tail gas absorbing system, as illustrated, tail gas absorbing system includes the He of tail gas absorber 51
Be arranged on the gas skirt of the top of main filter press 14, the exhaust gas entrance of the tail gas absorber 51 respectively with reaction tank 11, reaction tank
Transfer pond 12, quenched pond 21 are connected with the exhaust steam passage at the top of gas skirt, the absorbing liquid entrance of the tail gas absorber 51 with from
Carry out grid connection, the absorbing liquid outlet of tail gas absorber 51 is connected with wastewater disposal basin 44.What is produced in production process contains sour waste gas
Unified collect to tail gas absorber 51 is absorbed, and is absorbed after waste water is merged into wastewater disposal basin 44 with slag washes and is sent into reaction tank
11 and quenched pond 21 apply mechanically.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (5)
1. a kind of solid polyaluminium chloride reaction unit of environment-protecting clean, it is characterised in that：Reacted including single step reaction system, two steps
System, roller drying system, slag treatment system and tail gas absorbing system；
The single step reaction system includes reaction tank, reaction tank transfer pond, flocculating agent formulation tank I, main filter press and a step liquid pool,
The reaction tank is provided with bauxite charge door and acid solution charge door, and reaction tank is connected with reaction tank transfer pond, flocculating agent formulation
Tank I is connected with reaction tank transfer pond, and reaction tank transfer pond is connected by the muddy material pump of a step liquid with the entrance of main filter press, main press filtration
The liquid outlet of machine is connected with a step liquid pool；
The two steps reaction system includes quenched pond, quenched Chi Zhongzhuanchi, cooling tower, separate tank, separation slag saving pond, flocculant
Preparing tank II and semi-finished product pond, the step liquid pool are connected by a step liquid delivery pump with quenched pond, and the quenched pond is provided with
Calcium aluminate charge door, quenched pond is connected with quenched Chi Zhongzhuanchi, and quenched Chi Zhongzhuanchi passes through quenched liquid delivery pump and cooling tower
Entrance is connected, and the outlet of cooling tower is connected with separate tank, and flocculating agent formulation tank II is connected with separate tank, the top of separate tank and half
End product pool is connected, and the bottom of separate tank is with separating the connection of slag saving pond, and separation slag saving pond is by separating slag delivery pump and reaction
Pond is connected；
The roller drying system includes drying liquid gravity tank, drying drum and finished belt conveyer, and the semi-finished product pond leads to
More than half finished product liquid pumps are connected with drying liquid gravity tank, are dried liquid gravity tank and are connected with the drying liquid entrance of drying drum, dry rolling
The solid outlet of cylinder is just to finished belt conveyer；
The slag treatment system includes slag kitchen sink, slag filter press, slag dryer and wastewater disposal basin, the press filtration of the main filter press
Slag outlet is connected with slag kitchen sink, and the slag kitchen sink is connected by washed-residue delivery pump with the entrance of slag filter press, slag press filtration
The filter-press residues outlet of machine is connected with slag dryer, and the liquid outlet of slag filter press is connected with wastewater disposal basin, and wastewater disposal basin passes through waste water pump
Connected respectively with reaction tank and quenched pond；
The tail gas absorbing system includes tail gas absorber and the gas skirt being arranged on above main filter press, the tail gas absorber
Exhaust gas entrance connected respectively with the exhaust steam passage at the top of reaction tank, reaction tank transfer pond, quenched pond and gas skirt, the tail gas
The absorbing liquid entrance on absorption tower is connected with tap water pipe network, and the absorbing liquid outlet of tail gas absorber is connected with wastewater disposal basin.
2. the solid polyaluminium chloride reaction unit of environment-protecting clean according to claim 1, it is characterised in that：The reaction
Pond, reaction tank transfer pond and flocculating agent formulation tank I are equipped with agitator, and the quantity of the muddy material pump of step liquid is for two and mutual
Parallel connection, the quantity of the main filter press is for three and parallel with one another, and the quantity of the step liquid pool is for four and parallel with one another.
3. the solid polyaluminium chloride reaction unit of environment-protecting clean according to claim 1, it is characterised in that：It is described quenched
Pond, separate tank, separation slag saving pond and flocculating agent formulation tank II are equipped with agitator, and the cooling tower is provided with the cold of air-introduced machine
But tower.
4. the solid polyaluminium chloride reaction unit of environment-protecting clean according to claim 1, it is characterised in that：The dry rolling
The quantity of cylinder is for 20 and parallel with one another, and the drying drum is provided with high-altitude vapor discharge channel, the semi-finished product liquid pump
Quantity is two and parallel with one another.
5. the solid polyaluminium chloride reaction unit of environment-protecting clean according to claim 1, it is characterised in that：The main press filtration
The filter-press residues outlet of machine is connected by belt conveyor with slag kitchen sink, and the filter-press residues outlet of the slag filter press is defeated by belt
Machine is sent to be connected with slag dryer, the slag kitchen sink is provided with agitator, the quantity of the slag filter press is for two and parallel with one another,
The wastewater disposal basin is connected with tap water pipe network.
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| CN1088892A (en) * | 1992-03-26 | 1994-07-06 | 清华大学 | The manufacture method of polyphosphoric aluminium chloride coagulant |
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| CN1054955A (en) * | 1990-03-10 | 1991-10-02 | 河南省巩县中原给水排水工程材料厂 | Produce the method and the device of aluminium chlorohydroxide from aluminous ore |
| CN1088892A (en) * | 1992-03-26 | 1994-07-06 | 清华大学 | The manufacture method of polyphosphoric aluminium chloride coagulant |
| CN1381401A (en) * | 2002-06-12 | 2002-11-27 | 牛程鹏 | Process and equipment for preparing aluminium polychloride |
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| CN104743590A (en) | 2015-07-01 |
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