CN104743593A - Solid polyaluminium chloride production system - Google Patents
Solid polyaluminium chloride production system Download PDFInfo
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- CN104743593A CN104743593A CN201310748337.6A CN201310748337A CN104743593A CN 104743593 A CN104743593 A CN 104743593A CN 201310748337 A CN201310748337 A CN 201310748337A CN 104743593 A CN104743593 A CN 104743593A
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Abstract
The invention discloses a solid polyaluminium chloride production system comprising an acid tank system, a one-step reaction system, a two-step reaction system, a drum drying system and a crushing and packaging system, wherein the one-step reaction system comprises a reaction tank, a reaction tank transfer pool, a flocculant preparation tank I, a main filter press and a one-step liquid pool, the two-step reaction system comprises a conditioning tank, a conditioning tank transfer pool, a cooling tower, a separation pool, a separation residue storage pool, a flocculant preparation tank II and a semi-finished product pool, the drum drying system comprises a drying liquid high level tank, a drying drum and a finished product belt conveyor, and the crushing and packaging system comprises a feed hopper, a crusher, a bucket elevator, a finished product bit and a metering and packaging device. The solid polyaluminium chloride production system disclosed by the invention is used for effectively controlling and reducing the content of insoluble substance in reaction liquid, improving the yield and quality of a final solid polyaluminium chloride product, and saving energy and reducing consumption in the production of the solid polyaluminium chloride.
Description
Technical field
The invention belongs to poly aluminium chloride production technical field, relate to a kind of solid poly aluminium chloride production equipment.
Background technology
Poly aluminium chloride, is commonly called as water purification agent, has another name called polymerize aluminum chloride, is called for short poly-aluminium, english name PAC; It is the cationic inorganic polymer flocculant of a kind of poly-hydroxy, multinuclear complexing body, and solid phase prod outward appearance is sorrel, yellow or white solid powder, and its chemical molecular formula is [AL
2(OH)
ncL
6-n]
m(in formula, 1≤n≤5, m≤10), wherein m represents extent of polymerization, and n represents the neutral degree of PAC product, soluble in water, there is stronger bridge formation adsorptivity, with physico changes such as electrochemistry, cohesion, absorption and precipitations in hydrolytic process, final generation [AL
2(OH)
3(OH)
3], thus reach purification object.
The fundamental difference of poly aluminium chloride and conventional inorganic coagulating agent is that conventional inorganic coagulating agent is low molecule crystal salt, and the structure of poly aluminium chloride is made up of the polycarboxy complex compound that form is changeable, flocculation sediment speed is fast, be suitable for pH value wide ranges, to pipe-line equipment non-corrosiveness, purifying water effect is obvious, and effectively can prop up dewater middle chromaticness SS, COD, BOD and the heavy metal ion such as arsenic, mercury, this product is widely used in tap water, process water and sewage treatment area.
Poly aluminium chloride is divided into form to be divided into two kinds: a. liquid poly aluminium chloride to be undried form, have and need not dilute, load and unload easy to use, that price is relatively cheap advantage, shortcoming is traffic requirements tank car, and unit cost increases (solid per ton is equivalent to 2-3 ton liquid); B. solid poly aluminium chloride is dried form, has the advantage of convenient transportation, does not need tank car, also needs dilution when shortcoming is and uses, and increases working strength.
The raw material producing poly aluminium chloride mainly contains two large classes: a class is aluminum-containing mineral, comprises bauxite (gibbsite, boehmite, diaspore), clay, kaolin, alunite etc.; Another kind of is other aluminum-containing raw material, comprises metallic aluminium, aluminium scrap bits, grey aluminium, aluminium hydroxide, aluminum chloride, coal gangue, flyash etc.The method of current production poly aluminium chloride mainly contains metallic aluminium (comprising aluminium ash, lead skim) method, active aluminium hydroxide method, aluminium sesquioxide (comprising bauxitic clay, coal gangue etc.) method, crystal aluminum chloride method etc.
1. metallic aluminium method: adopt the raw material of metallic aluminium method synthesis poly aluminium chloride to be mainly the tankage of aluminium processing, as aluminium bits, aluminium ash and aluminium slag etc.Under agitation slowly add hydrochloric acid according to a certain ratio by aluminium ash to react, obtain liquid aluminium polychloride through slaking polymerization, sedimentation, then through dilute filtration, concentrated, dry obtained.Technique can be divided into acid system, alkaline process, neutralisation 3 kinds.Acid system mainly uses HCl, and quality product is wayward; Alkaline process producting process difficulty is higher, and facility investment is comparatively large and alkali charge is large, and pH controls to take raw material, and cost is higher; Maximum be neutralisation, as long as control proportioning well, generally can be up to state standards.
2. aluminium hydroxide method
The levels of toxic substances such as aluminium hydrate powder purity is higher, the poly aluminium chloride heavy metal of synthesis are low, the general production technique adopting heating and pressurizing acid-soluble.This technics comparing is simple, but the basicity of the polymerize aluminum chloride produced is lower, and therefore generally employing aluminium hydroxide temperature-pressure is acid-soluble adds in calcium aluminate breeze and two procedures.
3. aluminium sesquioxide method
Raw material containing aluminium sesquioxide mainly contains gibbsite, aluminium vanadine, kaolin, coal gangue etc.This production technique can be divided into two steps: the first step obtains crystal aluminum chloride, and second step obtains poly aluminium chloride by pyrolysis method or neutralisation.
4. aluminium chloride process
Adopt chlorination aluminium powder to be Raw material processing poly aluminium chloride, this method application is the most general.Available crystal aluminum chloride carries out boiling pyrolysis in 170 DEG C, adds water cure polymerization, then through solidification, dry obtained.
Solid poly aluminium chloride production equipment built at present, majority is that bauxitic clay and calcium aluminate two-step approach produce liquid poly aluminium chloride, is then the device of solid poly aluminium chloride by liquid poly aluminium chloride spraying dry or roller drying.The following shortcoming of existing solid poly aluminium chloride production equipment ubiquity:
1) in the acid-soluble reaction of the first step and second step polyreaction, all can produce a large amount of insolubles and be difficult to be separated with reaction solution, cause insolubles severe overweight in final solid poly aluminium chloride product;
2) roller drying system used, flow setting is reasonable not, causes energy consumption for drying high cost, and also compares through the transportation processing of the solid poly aluminium chloride of roller drying and waste time and energy;
3) the solid poly aluminium chloride that drying obtains can present bulk and harden, if directly pack sale, can affect product quality image.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of solid poly aluminium chloride production equipment, effective control and the insolubles content reduced in reaction solution, improve the seed output and quality of final solid poly aluminium chloride product, and the production of solid poly aluminium chloride is saved energy and reduce the cost.
For achieving the above object, the invention provides following technical scheme:
Solid poly aluminium chloride production equipment of the present invention, comprises sour can system, single step reaction system, two step reactive systems, roller drying system and crushing packing system;
Described sour can system comprises sulfuric acid storage tank system and hydrochloric acid tank system, sulfuric acid storage tank system comprises sulfuric acid storage tank and sulfuric acid unloading pump, sulfuric acid pump outlet of unloading is communicated with sulfuric acid storage tank, hydrochloric acid tank system comprises hydrochloric acid tank, hydrochloric acid unloading pump and hydrochloric acid transferpump, hydrochloric acid pump outlet of unloading is communicated with hydrochloric acid tank, and the entrance of hydrochloric acid transferpump is communicated with hydrochloric acid tank;
Described single step reaction system comprises reaction tank, reaction tank transfer pond, flocculating agent formulation tank I, main pressure filter and a step liquid pool, described hydrochloric acid conveying pump outlet is communicated with reaction tank, described sulfuric acid storage tank is communicated with reaction tank, described reaction tank is provided with bauxitic clay charging opening, reaction tank is communicated with reaction tank transfer pond, flocculating agent formulation tank I is communicated with reaction tank transfer pond, reaction tank transfer pond is communicated with the entrance of main pressure filter by a step liquid muddy material pump, and the liquid exit of main pressure filter is communicated with a step liquid pool;
Described two step reactive systems comprise modified pond, modified Chi Zhongzhuanchi, cooling tower, separate tank, be separated slag saving pond, flocculating agent formulation tank II and work in-process pond, a described step liquid pool is communicated with modified pond by a step liquid transferpump, described modified pond is provided with calcium aluminate charging opening, modified pond is communicated with modified Chi Zhongzhuanchi, modified Chi Zhongzhuanchi is communicated with the entrance of cooling tower by modified liquid transferpump, the outlet of cooling tower is communicated with separate tank, flocculating agent formulation tank II is communicated with separate tank, the top of separate tank is communicated with work in-process pond, the bottom of separate tank be separated slag saving pond and be communicated with, be separated slag saving pond to be communicated with reaction tank by being separated slag transferpump,
Described roller drying system comprises dry liquid high level tank, drying drum and finished belt transfer roller, described work in-process pond is communicated with dry liquid high level tank by work in-process liquid pump, dry liquid high level tank is communicated with the dry liquid entrance of drying drum, and the solid outlet of drying drum is just to finished belt transfer roller;
Described crushing packing system comprises feeding hopper, crusher, chapelet, finished product bin and metering packing system, described finished belt transfer roller is connected with feeding hopper, feeding hopper is connected with crusher, crusher is connected with chapelet, chapelet is connected with finished product bin, and finished product bin is connected with metering packing system.
Further, the quantity of described sulfuric acid unloading pump is two and parallel with one another, and the quantity of described hydrochloric acid tank is ten and parallel with one another, and the quantity of described hydrochloric acid unloading pump is two and parallel with one another, and the quantity of described hydrochloric acid transferpump is two and parallel with one another.
Further, described reaction tank, reaction tank transfer pond and flocculating agent formulation tank I are equipped with agitator, the quantity of a described step liquid muddy material pump is two and parallel with one another, and the quantity of described main pressure filter is three and parallel with one another, and the quantity of a described step liquid pool is four and parallel with one another.
Further, described modified pond, separate tank, separation slag saving pond and flocculating agent formulation tank II are equipped with agitator, and described cooling tower is the cooling tower being provided with induced draft fan.
Further, the quantity of described drying drum is 20 and parallel with one another, and described drying drum is provided with high-altitude vapor discharge channel, and the quantity of described work in-process liquid pump is two and parallel with one another.
Further, described reaction tank is provided with Waste gas outlet and vapor interface, and described reaction tank transfer pond is provided with Waste gas outlet, is provided with gas skirt above described main pressure filter, and described modified pond is provided with Waste gas outlet and vapor interface.
Beneficial effect of the present invention is:
1) the present invention arranges the devices such as flocculating agent formulation tank, pressure filter and separate tank in single step reaction system and two step reactive systems, by the insolubles produced in coagulating sedimentation separation of produced, improves the seed output and quality of final solid poly aluminium chloride product;
2) the present invention is provided with dry liquid high level tank, first by dry for the suction of liquid poly aluminium chloride liquid high level tank, high temperature dehydration drying is carried out to each drying drum by dry liquid high level tank distribution feed liquid, thus the object of uniform distribution is reached with succinct technical process efficiently, reduce energy consumption for drying cost;
3) the present invention is also provided with the finished belt transfer roller matched with drying drum, and automatically collect conveying solid substance poly aluminium chloride by finished belt transfer roller, that has saved solid poly aluminium chloride transports cost;
4) the present invention is also provided with crusher, before solid poly aluminium chloride enters finished product bin, first carry out fragmentation to it, and being hardened by broken finished product ensure that quality product.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is the structural representation of sour can system;
Fig. 2 is the structural representation of single step reaction system;
Fig. 3 is the structural representation of two step reactive systems;
Fig. 4 is the structural representation of roller drying system;
Fig. 5 is the structural representation of crushing packing system.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Solid poly aluminium chloride production equipment of the present invention, comprises sour can system, single step reaction system, two step reactive systems, roller drying system and crushing packing system.
Fig. 1 is the structural representation of sour can system, as shown in the figure, acid can system comprises sulfuric acid storage tank system and hydrochloric acid tank system, sulfuric acid storage tank system comprises sulfuric acid storage tank 11 and sulfuric acid unloading pump 12, the outlet of sulfuric acid unloading pump 12 is communicated with sulfuric acid storage tank 11, hydrochloric acid tank system comprises hydrochloric acid tank 13, hydrochloric acid unloading pump 14 and hydrochloric acid transferpump 15, and the outlet of hydrochloric acid unloading pump 14 is communicated with hydrochloric acid tank 13, and the entrance of hydrochloric acid transferpump 15 is communicated with hydrochloric acid tank 13; The quantity of described sulfuric acid unloading pump 12 is two and parallel with one another, and the quantity of described hydrochloric acid tank 13 is ten and parallel with one another, and the quantity of described hydrochloric acid unloading pump 14 is two and parallel with one another, and the quantity of described hydrochloric acid transferpump 15 is two and parallel with one another.Sulfuric acid from tank car for sulphuric acid use pumps into sulfuric acid storage tank 11 by sulfuric acid unloading pump 12, and the hydrochloric acid from hydrochloric acid tank car pumps into hydrochloric acid tank 13 by hydrochloric acid unloading pump 14.
Fig. 2 is the structural representation of single step reaction system, as shown in the figure, single step reaction system comprises reaction tank 21, reaction tank transfer pond 22, flocculating agent formulation tank I 23, main pressure filter 24 and a step liquid pool 25, the outlet of described hydrochloric acid transferpump 15 is communicated with reaction tank 21, described sulfuric acid storage tank 11 is communicated with reaction tank 21, described reaction tank 21 is provided with bauxitic clay charging opening, reaction tank 21 is communicated with reaction tank transfer pond 22, flocculating agent formulation tank I 23 is communicated with reaction tank transfer pond 22, reaction tank transfer pond 22 is communicated with the entrance of main pressure filter 24 by a step liquid muddy material pump 26, the liquid exit of main pressure filter 24 is communicated with a step liquid pool 25, described reaction tank 21, reaction tank transfer pond 22 and flocculating agent formulation tank I 23 are equipped with agitator, the quantity of a described step liquid muddy material pump 26 is two and parallel with one another, the quantity of described main pressure filter 24 is three and parallel with one another, and the quantity of a described step liquid pool 25 is four and parallel with one another.Hydrochloric acid and processing wastewater is added in reaction tank 21, then the bauxitic clay of formula ratio is dropped into, reacting by heating, reaction product is taked to put into reaction tank transfer pond 22 from stream mode, add the flocculation of poly-propionic acid amide flocculation agent by flocculating agent formulation tank I 23, then pump in main pressure filter 24 by a step liquid muddy material pump 26, reaction tank product is carried out the separation of slag liquid, an isolated step liquid pump enters in a step liquid pool 25, and the slag wash trough that removes slag carries out subsequent disposal.
Fig. 3 is the structural representation of two step reactive systems, as shown in the figure, two step reactive systems comprise modified pond 31, transfer pond, modified pond 32, cooling tower 33, separate tank 34, be separated slag saving pond 35, flocculating agent formulation tank II 36 and work in-process pond 37, a described step liquid pool 25 is communicated with modified pond 31 by a step liquid transferpump 38, described modified pond 31 is provided with calcium aluminate charging opening, modified pond 31 is communicated with transfer pond, modified pond 32, transfer pond, modified pond 32 is communicated with the entrance of cooling tower 33 by modified liquid transferpump 39, the outlet of cooling tower 33 is communicated with separate tank 34, flocculating agent formulation tank II 36 is communicated with separate tank 34, the top of separate tank 34 is communicated with work in-process pond 37, the bottom of separate tank 34 be separated slag saving pond 35 and be communicated with, be separated slag saving pond 35 to be communicated with reaction tank 21 by being separated slag transferpump 30, described modified pond 31, separate tank 34, separation slag saving pond 35 and flocculating agent formulation tank II 36 are equipped with agitator, and described cooling tower 33 is for being provided with the cooling tower of induced draft fan.By a step liquid transferpump 38, a step liquid pump is entered in modified pond 31, the reaction of formula ratio calcium aluminate is progressively dropped under agitation condition, after having reacted, material in cooling tower 33 after air cooling, enter separate tank 34 to add flocculation agent and carry out flocculation separation, after quiescent settling, supernatant liquor is put into work in-process pond 37; Flocculation separation slag pumps into reaction tank 21 from separation slag saving pond 35, when slag in question response pond 21 reaches process stipulation disposal amount, add the reaction of formula ratio hydrochloric acid, sulfuric acid and water, after slag has reacted, material enters reaction tank transfer pond 22 by previous process flow process and carries out flocculation separation.
Fig. 4 is the structural representation of roller drying system, as shown in the figure, roller drying system comprises dry liquid high level tank 41, drying drum 42 and finished belt transfer roller 43, described work in-process pond 37 is communicated with dry liquid high level tank 41 by work in-process liquid pump 44, dry liquid high level tank 41 is communicated with the dry liquid entrance of drying drum 42, and the solid outlet of drying drum 42 is just to finished belt transfer roller 43; The quantity of described drying drum 42 is 20 and parallel with one another, and described drying drum 42 is provided with high-altitude vapor discharge channel 45, and the quantity of described work in-process liquid pump 44 is two and parallel with one another.In work in-process pond 37, work in-process liquid is by the dry liquid high level tank 41 of work in-process liquid pump 44 suction, carry out high temperature dehydration drying by dry liquid high level tank 41 feed liquid that distributes to each drying drum 42, the solid poly aluminium chloride through roller drying is carried by finished belt transfer roller 43.
Fig. 5 is the structural representation of crushing packing system, as shown in the figure, crushing packing system comprises feeding hopper 51, crusher 52, chapelet 53, finished product bin 54 and metering packing system 55, described finished belt transfer roller 43 is connected with feeding hopper 51, feeding hopper 51 is connected with crusher 52, crusher 52 is connected with chapelet 53, and chapelet 53 is connected with finished product bin 54, and finished product bin 54 is connected with metering packing system 55.Solid poly aluminium chloride enters finished product bin 54 after crusher 52 fragmentation, then calculates packaging.
In the present embodiment, described reaction tank 21 is provided with Waste gas outlet 27 and vapor interface 28, described reaction tank transfer pond 22 is provided with Waste gas outlet 29, is provided with gas skirt 20 above described main pressure filter 24, and described modified pond 31 is provided with Waste gas outlet 301 and vapor interface 302; Absorption process is carried out containing the unified tail gas absorber that is collected into of sour waste gas by what produce in reaction process.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (6)
1. a solid poly aluminium chloride production equipment, is characterized in that: comprise sour can system, single step reaction system, two step reactive systems, roller drying system and crushing packing system;
Described sour can system comprises sulfuric acid storage tank system and hydrochloric acid tank system, sulfuric acid storage tank system comprises sulfuric acid storage tank and sulfuric acid unloading pump, sulfuric acid pump outlet of unloading is communicated with sulfuric acid storage tank, hydrochloric acid tank system comprises hydrochloric acid tank, hydrochloric acid unloading pump and hydrochloric acid transferpump, hydrochloric acid pump outlet of unloading is communicated with hydrochloric acid tank, and the entrance of hydrochloric acid transferpump is communicated with hydrochloric acid tank;
Described single step reaction system comprises reaction tank, reaction tank transfer pond, flocculating agent formulation tank I, main pressure filter and a step liquid pool, described hydrochloric acid conveying pump outlet is communicated with reaction tank, described sulfuric acid storage tank is communicated with reaction tank, described reaction tank is provided with bauxitic clay charging opening, reaction tank is communicated with reaction tank transfer pond, flocculating agent formulation tank I is communicated with reaction tank transfer pond, reaction tank transfer pond is communicated with the entrance of main pressure filter by a step liquid muddy material pump, and the liquid exit of main pressure filter is communicated with a step liquid pool;
Described two step reactive systems comprise modified pond, modified Chi Zhongzhuanchi, cooling tower, separate tank, be separated slag saving pond, flocculating agent formulation tank II and work in-process pond, a described step liquid pool is communicated with modified pond by a step liquid transferpump, described modified pond is provided with calcium aluminate charging opening, modified pond is communicated with modified Chi Zhongzhuanchi, modified Chi Zhongzhuanchi is communicated with the entrance of cooling tower by modified liquid transferpump, the outlet of cooling tower is communicated with separate tank, flocculating agent formulation tank II is communicated with separate tank, the top of separate tank is communicated with work in-process pond, the bottom of separate tank be separated slag saving pond and be communicated with, be separated slag saving pond to be communicated with reaction tank by being separated slag transferpump,
Described roller drying system comprises dry liquid high level tank, drying drum and finished belt transfer roller, described work in-process pond is communicated with dry liquid high level tank by work in-process liquid pump, dry liquid high level tank is communicated with the dry liquid entrance of drying drum, and the solid outlet of drying drum is just to finished belt transfer roller;
Described crushing packing system comprises feeding hopper, crusher, chapelet, finished product bin and metering packing system, described finished belt transfer roller is connected with feeding hopper, feeding hopper is connected with crusher, crusher is connected with chapelet, chapelet is connected with finished product bin, and finished product bin is connected with metering packing system.
2. solid poly aluminium chloride production equipment according to claim 1, it is characterized in that: the quantity of described sulfuric acid unloading pump is two and parallel with one another, the quantity of described hydrochloric acid tank is ten and parallel with one another, the quantity of described hydrochloric acid unloading pump is two and parallel with one another, and the quantity of described hydrochloric acid transferpump is two and parallel with one another.
3. solid poly aluminium chloride production equipment according to claim 1, it is characterized in that: described reaction tank, reaction tank transfer pond and flocculating agent formulation tank I are equipped with agitator, the quantity of a described step liquid muddy material pump is two and parallel with one another, the quantity of described main pressure filter is three and parallel with one another, and the quantity of a described step liquid pool is four and parallel with one another.
4. solid poly aluminium chloride production equipment according to claim 1, it is characterized in that: described modified pond, separate tank, separation slag saving pond and flocculating agent formulation tank II are equipped with agitator, described cooling tower is the cooling tower being provided with induced draft fan.
5. solid poly aluminium chloride production equipment according to claim 1, it is characterized in that: the quantity of described drying drum is 20 and parallel with one another, described drying drum is provided with high-altitude vapor discharge channel, and the quantity of described work in-process liquid pump is two and parallel with one another.
6. solid poly aluminium chloride production equipment according to claim 1, it is characterized in that: described reaction tank is provided with Waste gas outlet and vapor interface, described reaction tank transfer pond is provided with Waste gas outlet, be provided with gas skirt above described main pressure filter, described modified pond is provided with Waste gas outlet and vapor interface.
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