CN203687543U - High-efficiency and energy-saving heat conduction oil type roller drying system for producing PAC (Poly Aluminum Chloride) - Google Patents
High-efficiency and energy-saving heat conduction oil type roller drying system for producing PAC (Poly Aluminum Chloride) Download PDFInfo
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- CN203687543U CN203687543U CN201320767397.8U CN201320767397U CN203687543U CN 203687543 U CN203687543 U CN 203687543U CN 201320767397 U CN201320767397 U CN 201320767397U CN 203687543 U CN203687543 U CN 203687543U
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Abstract
The utility model discloses a high-efficiency and energy-saving heat conduction oil type roller drying system for producing PAC (Poly Aluminum Chloride). The drying system comprises a PAC liquid conveying pump, a drying liquid high level tank, a roller drying device, a finished-product belt conveyor and a boiler system, wherein the roller drying system comprises a plurality of drying units, and each drying unit comprises a drying roller, a scraper, a feed liquid disc, a feed inlet pipe and a feed catching plate; the boiler system comprises a heat conduction oil boiler, a waste heat boiler, a desulfurizing and dedusting device and a high-altitude chimney; the PAC liquid conveying pump is communicated with the drying liquid high level tank, the drying liquid high level tank is communicated with the feed inlet pipe of the roller drying device, the lower end of the feed catching plate of the roller drying device directly faces the finished-product belt conveyor, a heat conduction oil outlet pipeline of the heat conduction oil boiler is communicated with an oil inlet pipe of the drying roller, and an oil outlet pipe of the drying roller is communicated with a heat conduction oil inlet pipeline of the heat conduction oil boiler. The high-efficiency and energy-saving heat conduction oil type roller drying system for producing the PAC, disclosed by the utility model, has the advantages that the drying energy consumption cost can be reduced, and the drying system is energy-saving, consumption-reducing, environment-friendly and clean.
Description
Technical field
The utility model belongs to polyaluminium chloride production technical field, relates to the high-efficiency energy-saving heat-conducting oil formula roller drying system that a kind of polyaluminium chloride is produced.
Background technology
Polyaluminium chloride, is commonly called as water purification agent, has another name called aluminium polychloride, is called for short poly-aluminium, english name PAC; It is the cationic inorganic polymer flocculant of a kind of polyhydroxy, multinuclear complexing body, and solid product outward appearance is bronzing, 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, in hydrolytic process, follow the physicsization such as electrochemistry, cohesion, absorption and precipitation to change, the final [AL that generates
2(OH)
3(OH)
3], thereby reach purification object.
The fundamental difference of polyaluminium chloride and traditional inorganic coagulant is that traditional inorganic coagulant is low molecular crystalline salt, and the structure of polyaluminium chloride is made up of the changeable polynary carboxyl complex compound of form, flocculation sediment speed is fast, be suitable for pH value wide ranges, to pipe-line equipment non-corrosiveness, purifying water effect is obvious, can effectively prop up the heavy metal ion such as middle chromaticness SS, COD, BOD and arsenic, mercury that dewater, and this product is widely used in drinking water, water for industrial use and sewage treatment area.
Polyaluminium chloride is divided into form and is divided into two kinds: a. liquid polyaluminium chloride is undried form, have and need not dilute, load and unload advantage easy to use, price is relatively cheap, shortcoming is traffic requirements tank car, and unit cost increases (solid per ton is equivalent to 2-3 ton liquid); B. solid polyaluminium chloride is dried form, has the advantage of convenient transportation, while not needing tank car, shortcoming to be use, also needs dilution, increases working strength.
The raw material of producing polyaluminium 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, alchlor, gangue, flyash etc.The method of producing at present polyaluminium chloride mainly contains metallic aluminium (comprising aluminium ash, lead skim) method, active aluminium hydroxide method, alundum (Al2O3) (comprising bauxite, gangue etc.) method, crystal aluminum chloride method etc.
Liquid polyaluminium chloride is dried with spraying solid polyaluminium chloride or roller drying obtains, in at present built polyaluminium chloride process units, two kinds of drying systems all occur, and spray drying system is suitable for large-scale production, and roller drying system is suitable for scale compared with small-scale production.The drying cost of polyaluminium chloride product has accounted for greatly, and still, the roller drying system of existing polyaluminium chloride process units exists following shortcoming:
1) the roller drying device heat exchanger effectiveness using is not high, heats inhomogeneously, can not effectively utilize the heat energy of conduction oil, is unfavorable for energy-saving and cost-reducing and reduces discharging;
2) flow setting is reasonable not, causes energy consumption for drying high cost, and the transportation processing of the solid polyaluminium chloride of process roller drying also relatively wastes time and energy;
3) while utilizing boiler heating conduction oil, not high to the heat utilization rate of steam generator system, and also not effectively processing of the coal-fired flue-gas that steam generator system is produced, particularly dust content does not reach discharge standard.
Summary of the invention
In view of this, the high-efficiency energy-saving heat-conducting oil formula roller drying system that provides a kind of polyaluminium chloride to produce is provided the purpose of this utility model, reduce energy consumption for drying cost, and coal heat type heat and fume afterheat are made full use of, make the production of polyaluminium chloride energy-saving and cost-reducing, environment-protecting clean.
For achieving the above object, the utility model provides following technical scheme:
The utility model discloses the high-efficiency energy-saving heat-conducting oil formula roller drying system that a kind of polyaluminium chloride is produced, described drying system comprises liquid polyaluminium chloride delivery pump, dry liquid gravity tank, roller drying device, finished belt conveyer and steam generator system;
Described roller drying device comprises several drying units, and each drying unit comprises drying drum, scraper, feed liquid dish, feed pipe and the plate that connects material; Described drying drum comprises urceolus, inner core, oil inlet pipe, flowline, current divider and spray bar, described urceolus is coated between inner core and urceolus and inner core and forms oil pocket, described spray bar is arranged in oil pocket and spray bar is provided with nozzle opening, described oil inlet pipe one end is stretched into oil pocket and is communicated with spray bar by current divider from urceolus end face, and oil pocket is stretched into from urceolus other end in described flowline one end; The blade of described scraper is close to outer tube outer surface, and described feed liquid dish is arranged at urceolus below and urceolus bottom is positioned at feed liquid dish, and the described feed pipe mouth of pipe is just to feed liquid dish, described in the plate that connects material tilt to install, on the plate that connects material, rectify scraper;
Described steam generator system comprises heat conducting oil boiler, waste heat boiler, desulfation dust-extraction device and high-altitude chimney; Described heat conducting oil boiler is provided with conduction oil inlet duct, conduction oil outlet conduit and coal-fired flue-gas pipeline, waste heat boiler is provided with feedwater piping, jet chimney, smoke inlet pipeline and exhanst gas outlet pipeline, and desulfation dust-extraction device is provided with smoke inlet pipeline and exhanst gas outlet pipeline; The coal-fired flue-gas pipeline of described heat conducting oil boiler and the smoke inlet pipeline communication of waste heat boiler, the exhanst gas outlet pipeline of waste heat boiler and the smoke inlet pipeline communication of desulfation dust-extraction device, the exhanst gas outlet pipeline of desulfation dust-extraction device is communicated with high-altitude chimney, and the feedwater piping of waste heat boiler is communicated with tap water pipe network;
Described liquid polyaluminium chloride delivery pump is communicated with dry liquid gravity tank, and dry liquid gravity tank is communicated with the feed pipe of roller drying device, under the plate that connects material of roller drying device, rectifies finished belt conveyer; The conduction oil outlet conduit of described heat conducting oil boiler is communicated with the oil inlet pipe of drying drum, and the flowline of drying drum is communicated with the conduction oil inlet duct of heat conducting oil boiler.
Further, the quantity of described liquid polyaluminium chloride delivery pump is two and parallel with one another.
Further, the nozzle opening on described spray bar is just to urceolus.
Further, on two end faces of described urceolus, be respectively equipped with axle sleeve, described oil inlet pipe and flowline are provided with sealing ring respectively through axle sleeve and body and axle sleeve.
Further, each drying unit also comprises the dust gathering arrester that is arranged at urceolus top.
Further, the quantity of described drying unit is 20.
Further, described desulfation dust-extraction device comprises dry collector, desulfurizing tower and wet electrical dust precipitator, the outlet of described dry collector is communicated with the smoke inlet of desulfurizing tower by blower fan, the exhanst gas outlet of described desulfurizing tower is communicated with the entrance of wet electrical dust precipitator, and the outlet of described wet electrical dust precipitator is communicated with high-altitude chimney.
Further, described desulfation dust-extraction device also comprises the heat recovery heat exchanger being arranged on before dry collector, the thermal medium entrance of described heat recovery heat exchanger is communicated with the exhanst gas outlet pipeline of waste heat boiler, thermal medium outlet is communicated with the entrance of dry collector, cold medium inlet is communicated with tap water pipe network, and cold media outlet is communicated with the feedwater piping of waste heat boiler.
The beneficial effects of the utility model are:
1) the utility model is provided with dry liquid gravity tank, first by dry the suction of liquid polyaluminium chloride liquid gravity tank, carrying out high temperature dehydration by dry liquid gravity tank distribution feed liquid to each drying unit of roller drying device is dried, thereby the object that has reached uniform distribution with succinct technological process efficiently, has reduced energy consumption for drying cost;
2) roller drying device that the utility model uses is high-efficiency heat conduction oil formula roller drying device, this device adopts the form of spray that conduction oil is sprayed onto on cylinder surface, forming oil film contacts with cylinder, can at utmost realize the contact area of conduction oil and cylinder surface, thereby improve the efficiency of its heat exchange, realize the maximum utilization to heat in conduction oil, can save the energy, consumption reduction reduces discharging;
3) the utility model is also provided with the finished belt conveyer matching with drying drum, the product centralized collection of multiple cylinders being produced by finished belt conveyer is carried, avoid artificially collecting and transported dry products, greatly reduced labour intensity, saved cost;
4) the utility model is provided with heat conducting oil boiler and waste heat boiler in steam generator system, heat conducting oil boiler is to heat-conducting oil heating, and waste heat boiler reclaims coal-fired flue-gas waste heat for generating steam, and steam is miscellaneous equipment heat supply, the heat energy of steam generator system is fully utilized, and has reached energy-saving and cost-reducing object;
5) the utility model arranges dry collector and wet electrical dust precipitator completes flue gas ash removal jointly in desulfation dust-extraction device, in guaranteeing desulfuration efficiency, has improved dust pelletizing system efficiency, has reduced dust emission concentration, has reached the object that environment-protecting clean is produced.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and beneficial effect clearer, the utility model provides following accompanying drawing to describe:
Fig. 1 is the structural representation (not comprising steam generator system) of drying system of the present utility model;
Fig. 2 is the main TV structure schematic diagram of a drying unit of roller drying device;
Fig. 3 is the left TV structure schematic diagram of a drying unit of roller drying device;
Fig. 4 is the structural representation that drying drum and finished belt conveyer are used in conjunction with;
Fig. 5 is the structural representation of steam generator system.
The specific embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
Fig. 1 is the structural representation (not comprising steam generator system) of drying system of the present utility model, as shown in the figure, the high-efficiency energy-saving heat-conducting oil formula roller drying system that polyaluminium chloride of the present utility model is produced, comprises liquid polyaluminium chloride delivery pump 1, dry liquid gravity tank 2, roller drying device, finished belt conveyer 3 and steam generator system.
Fig. 2 is the main TV structure schematic diagram of a drying unit of roller drying device, Fig. 3 is the left TV structure schematic diagram of a drying unit of roller drying device, as shown in the figure, described roller drying device comprises several drying units, and each drying unit comprises drying drum 4, scraper 5, feed liquid dish 6, feed pipe 7 and the plate 8 that connects material; Described drying drum 4 comprises urceolus 41, inner core 42, oil inlet pipe 43, flowline 44, current divider 45 and spray bar 46, described urceolus 41 is coated between inner core 42 and urceolus 41 and inner core 42 and forms oil pocket 47, described spray bar 46 is arranged in oil pocket 47 and spray bar 46 is provided with nozzle opening 48, described oil inlet pipe 43 one end are stretched into oil pocket 47 and are communicated with spray bar 46 by current divider 45 from urceolus 41 end faces, and oil pocket 47 is stretched into from urceolus 41 other ends in described flowline 44 one end; The blade of described scraper 5 is close to urceolus 41 outer surfaces, and described feed liquid dish 6 is arranged at urceolus 41 belows and urceolus 41 bottoms are positioned at feed liquid dish 6, and described feed pipe 7 mouths of pipe are just to feed liquid dish 6, described in the plate 8 that connects material tilt to install, on the plate 8 that connects material, rectify scraper 5.
Fig. 5 is the structural representation of steam generator system, and as shown in the figure, described steam generator system comprises heat conducting oil boiler 9, waste heat boiler 10, desulfation dust-extraction device 11 and high-altitude chimney 12; Described heat conducting oil boiler 9 is provided with conduction oil inlet duct 13, conduction oil outlet conduit 14 and coal-fired flue-gas pipeline 15, waste heat boiler 10 is provided with feedwater piping 16, jet chimney 17, smoke inlet pipeline 18 and exhanst gas outlet pipeline 19, and desulfation dust-extraction device 11 is provided with smoke inlet pipeline 20 and exhanst gas outlet pipeline 21; The coal-fired flue-gas pipeline 15 of described heat conducting oil boiler 9 is communicated with the smoke inlet pipeline 18 of waste heat boiler 10, the exhanst gas outlet pipeline 19 of waste heat boiler 10 is communicated with the smoke inlet pipeline 20 of desulfation dust-extraction device 11, the exhanst gas outlet pipeline 21 of desulfation dust-extraction device 11 is communicated with high-altitude chimney 12, and the feedwater piping 16 of waste heat boiler 10 is communicated with tap water pipe network.
Fig. 4 is the structural representation that drying drum and finished belt conveyer are used in conjunction with, as shown in the figure, described liquid polyaluminium chloride delivery pump 1 is communicated with dry liquid gravity tank 2, dry liquid gravity tank 2 is communicated with the feed pipe 7 of roller drying device, and the plate that connects material of roller drying device is rectified finished belt conveyer 3 for 8 times; The conduction oil outlet conduit 14 of described heat conducting oil boiler 9 is communicated with the oil inlet pipe 43 of drying drum 4, and the flowline 44 of drying drum 4 is communicated with the conduction oil inlet duct 13 of heat conducting oil boiler 9.
The course of work of the present utility model is: liquid polyaluminium chloride, by the dry liquid gravity tank 2 of liquid polyaluminium chloride delivery pump 1 suction, carries out high temperature dehydration by dry liquid gravity tank 2 distribution feed liquids to each drying unit of roller drying device and is dried; When drying drum 4 is worked, heat conducting oil boiler 9 heats conduction oil, conduction oil after heating is supplied with oil inlet pipe 43 by oil pump, through current divider 45 and spray bar 46, then spray at urceolus 41 inner surfaces, urceolus 41 is heated, conduction oil is under the effect of self gravitation, progressively collect downwards, in the time that the degree of depth of the conduction oil collecting exceedes the height of flowline 44, conduction oil is discharged through flowline 44, returns to heat conducting oil boiler 9, urceolus 41 and inner core 42 rotate in the course of the work, and oil inlet pipe 43 and flowline 44 are motionless; When urceolus 41 slow circumvolve after heat-conducting oil heating, liquid polyaluminium chloride in feed liquid dish 6 is film-form and is attached to urceolus 41 outer surfaces, moisture is vaporized, fall apart in surrounding air, the solid polyaluminium chloride that is attached to urceolus 41 is scraped by scraper 5 in the form of sheets, drop on equably and connect material on plate 8, be then slipped on finished belt conveyer 3, the solid polyaluminium chloride product centralized collection of multiple cylinders being produced by finished belt conveyer 3 is carried; And the coal-fired flue-gas of heat conducting oil boiler 9 absorbs waste heat for generating steam through waste heat boiler 10, steam is miscellaneous equipment heat supply, and coal-fired flue-gas through desulfation dust-extraction device 11 desulfurization and dedustings, discharges through high-altitude chimney 12 after waste heat boiler 10.
In the present embodiment, the quantity of described liquid polyaluminium chloride delivery pump 1 is two and parallel with one another, and the quantity of described drying unit is 20.
As further improvement of the utility model, the nozzle opening 48 on described spray bar 46 is just to urceolus 41; Directly conduction oil is sprayed on urceolus 41 inner surfaces.
As further improvement of the utility model, on 41 two end faces of described urceolus, be respectively equipped with axle sleeve 49, described oil inlet pipe 43 and flowline 44 are provided with sealing ring 40 respectively through axle sleeve 49 and body and axle sleeve; It is in order to prevent that conduction oil from leaking that axle sleeve 49 and sealing ring 40 are set.
As further improvement of the utility model, each drying unit also comprises the dust gathering arrester 22 that is arranged at urceolus 41 tops; Dust gathering arrester 22 is in order to prevent that dried granular material from dispersing, and causes product loss and contaminated environment.
As further improvement of the utility model, described desulfation dust-extraction device 11 comprises dry collector 23, desulfurizing tower 24 and wet electrical dust precipitator 25, the outlet of described dry collector 23 is communicated with the smoke inlet of desulfurizing tower 24 by blower fan 26, the exhanst gas outlet of described desulfurizing tower 24 is communicated with the entrance of wet electrical dust precipitator 25, and the outlet of described wet electrical dust precipitator 25 is communicated with high-altitude chimney 12.Dry collector 23 and wet electrical dust precipitator 25 complete flue gas ash removal jointly, in guaranteeing desulfuration efficiency, have improved dust pelletizing system efficiency, have reduced dust emission concentration, have reached the object that environment-protecting clean is produced.
As further improvement of the utility model, described desulfation dust-extraction device 11 also comprises the heat recovery heat exchanger 27 being arranged on before dry collector 23, the thermal medium entrance of described heat recovery heat exchanger 27 is communicated with the exhanst gas outlet pipeline 19 of waste heat boiler 10, thermal medium outlet is communicated with the entrance of dry collector 23, cold medium inlet is communicated with tap water pipe network, and cold media outlet is communicated with the feedwater piping 16 of waste heat boiler 10.Heat recovery heat exchanger 27 further absorbs fume afterheat preheating for the water of steam occurs, energy-saving and cost-reducing.
Finally explanation is, above preferred embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from the utility model claims limited range.
Claims (8)
1. the high-efficiency energy-saving heat-conducting oil formula roller drying system that polyaluminium chloride is produced, is characterized in that: described drying system comprises liquid polyaluminium chloride delivery pump, dry liquid gravity tank, roller drying device, finished belt conveyer and steam generator system;
Described roller drying device comprises several drying units, and each drying unit comprises drying drum, scraper, feed liquid dish, feed pipe and the plate that connects material; Described drying drum comprises urceolus, inner core, oil inlet pipe, flowline, current divider and spray bar, described urceolus is coated between inner core and urceolus and inner core and forms oil pocket, described spray bar is arranged in oil pocket and spray bar is provided with nozzle opening, described oil inlet pipe one end is stretched into oil pocket and is communicated with spray bar by current divider from urceolus end face, and oil pocket is stretched into from urceolus other end in described flowline one end; The blade of described scraper is close to outer tube outer surface, and described feed liquid dish is arranged at urceolus below and urceolus bottom is positioned at feed liquid dish, and the described feed pipe mouth of pipe is just to feed liquid dish, described in the plate that connects material tilt to install, on the plate that connects material, rectify scraper;
Described steam generator system comprises heat conducting oil boiler, waste heat boiler, desulfation dust-extraction device and high-altitude chimney; Described heat conducting oil boiler is provided with conduction oil inlet duct, conduction oil outlet conduit and coal-fired flue-gas pipeline, waste heat boiler is provided with feedwater piping, jet chimney, smoke inlet pipeline and exhanst gas outlet pipeline, and desulfation dust-extraction device is provided with smoke inlet pipeline and exhanst gas outlet pipeline; The coal-fired flue-gas pipeline of described heat conducting oil boiler and the smoke inlet pipeline communication of waste heat boiler, the exhanst gas outlet pipeline of waste heat boiler and the smoke inlet pipeline communication of desulfation dust-extraction device, the exhanst gas outlet pipeline of desulfation dust-extraction device is communicated with high-altitude chimney, and the feedwater piping of waste heat boiler is communicated with tap water pipe network;
Described liquid polyaluminium chloride delivery pump is communicated with dry liquid gravity tank, and dry liquid gravity tank is communicated with the feed pipe of roller drying device, under the plate that connects material of roller drying device, rectifies finished belt conveyer; The conduction oil outlet conduit of described heat conducting oil boiler is communicated with the oil inlet pipe of drying drum, and the flowline of drying drum is communicated with the conduction oil inlet duct of heat conducting oil boiler.
2. the high-efficiency energy-saving heat-conducting oil formula roller drying system that polyaluminium chloride according to claim 1 is produced, is characterized in that: the quantity of described liquid polyaluminium chloride delivery pump is two and parallel with one another.
3. the high-efficiency energy-saving heat-conducting oil formula roller drying system that polyaluminium chloride according to claim 1 is produced, is characterized in that: the nozzle opening on described spray bar is just to urceolus.
4. the high-efficiency energy-saving heat-conducting oil formula roller drying system that polyaluminium chloride according to claim 1 is produced, it is characterized in that: on two end faces of described urceolus, be respectively equipped with axle sleeve, described oil inlet pipe and flowline are provided with sealing ring respectively through axle sleeve and body and axle sleeve.
5. the high-efficiency energy-saving heat-conducting oil formula roller drying system that polyaluminium chloride according to claim 1 is produced, is characterized in that: each drying unit also comprises the dust gathering arrester that is arranged at urceolus top.
6. the high-efficiency energy-saving heat-conducting oil formula roller drying system that polyaluminium chloride according to claim 1 is produced, is characterized in that: the quantity of described drying unit is 20.
7. the high-efficiency energy-saving heat-conducting oil formula roller drying system that polyaluminium chloride according to claim 1 is produced, it is characterized in that: described desulfation dust-extraction device comprises dry collector, desulfurizing tower and wet electrical dust precipitator, the outlet of described dry collector is communicated with the smoke inlet of desulfurizing tower by blower fan, the exhanst gas outlet of described desulfurizing tower is communicated with the entrance of wet electrical dust precipitator, and the outlet of described wet electrical dust precipitator is communicated with high-altitude chimney.
8. the high-efficiency energy-saving heat-conducting oil formula roller drying system that polyaluminium chloride according to claim 2 is produced, it is characterized in that: described desulfation dust-extraction device also comprises the heat recovery heat exchanger being arranged on before dry collector, the thermal medium entrance of described heat recovery heat exchanger is communicated with the exhanst gas outlet pipeline of waste heat boiler, thermal medium outlet is communicated with the entrance of dry collector, cold medium inlet is communicated with tap water pipe network, and cold media outlet is communicated with the feedwater piping of waste heat boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320767397.8U CN203687543U (en) | 2013-11-29 | 2013-11-29 | High-efficiency and energy-saving heat conduction oil type roller drying system for producing PAC (Poly Aluminum Chloride) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320767397.8U CN203687543U (en) | 2013-11-29 | 2013-11-29 | High-efficiency and energy-saving heat conduction oil type roller drying system for producing PAC (Poly Aluminum Chloride) |
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| Publication Number | Publication Date |
|---|---|
| CN203687543U true CN203687543U (en) | 2014-07-02 |
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ID=51009431
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|---|---|---|---|
| CN201320767397.8U Expired - Fee Related CN203687543U (en) | 2013-11-29 | 2013-11-29 | High-efficiency and energy-saving heat conduction oil type roller drying system for producing PAC (Poly Aluminum Chloride) |
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|---|---|
| CN (1) | CN203687543U (en) |
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2013
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