CN103086443B - Equipment for preparing nickel oxide product from nickel chloride solution and recovering hydrochloric acid - Google Patents
Equipment for preparing nickel oxide product from nickel chloride solution and recovering hydrochloric acid Download PDFInfo
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- CN103086443B CN103086443B CN201310057661.3A CN201310057661A CN103086443B CN 103086443 B CN103086443 B CN 103086443B CN 201310057661 A CN201310057661 A CN 201310057661A CN 103086443 B CN103086443 B CN 103086443B
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Abstract
The invention relates to the technical field of preparing nickel oxide and recovering hydrochloric acid, and in particular relates to equipment for preparing nickel oxide and recovering hydrochloric acid by using nickel chloride solution. The equipment comprises a nickel chloride solution tank for collecting waste acid, a waste acid filter, a pre-concentrator, a roasting furnace, a furnace top sprinkler, a burner in tangent arrangement, a rotary horizontal stirrer, a crusher, a rotary valve, a nickel oxide powder pneumatic conveying and collecting system, a first-stage absorbing tower, a second-stage absorbing tower, a smoke exhaust fan, a washing tower, a feed pump sealing, cooling water circulating and water supplying device, a pyrolysis acid storage tank, a conveying pipeline, a gas-liquid separator, a chimney, a dust arrester, a pneumatic feeding device, a feeding pipeline online cleaning device, a combustion-supporting heating device, a back flushing flow assisting device, a chlorine remover and an air purifier. The equipment has the advantages that the adjustable range of the reaction temperature of the roasting furnace is expanded, waste gases reach an emission standard, the equipment utilization ratio of the roasting furnace is improved, and the environmental pollution is avoided.
Description
Technical field
The present invention relates to prepare nickel oxide and reclaim hydrochloric acid technical field, particularly a kind of equipment that utilizes nickel chloride solution to prepare nickel oxide product and recovery hydrochloric acid.
Background technology
In the preparation process of nickelous chloride, can produce the nickel compound of certain density hydrogenchloride and 100g/L～140g/L.In preparation process, the ratio regular meeting of hydrogenchloride progressively reduces, and when after the state of reaching capacity, dissolving will stop.In order to keep proceeding of dissolution process, the nickelous chloride in hydrogenchloride should be extracted, acid strength is reduced simultaneously.This just need to have a set of technology and equipment of preparing nickel oxide or nickel protoxide and reclaiming hydrochloric acid, the HCl solution that contains aforementioned proportion is delivered in preparation facilities, generate nickel oxide or nickel protoxide, also obtain concentration simultaneously and be about 20% hydrochloric acid, turn back to again in dissolution system recycling regeneration acid solution.Its process is: the nickel chloride solution that contains certain proportion concentration is collected in nickel chloride solution tank, sends into preconcentrator with nickelous chloride feeding pump through nickel chloride solution fine filter, use pneumatic adjusting valve automatic control flow.Nickel chloride solution is delivered to preconcentrator top by preconcentrator recycle pump and is sprayed by nozzle, nickel chloride solution with carry out direct heat exchange from the furnace gas (350 ℃～650 ℃) of stoving oven, part moisture content in heat exchanging process in nickel chloride solution is evaporated, and nickel chloride solution is concentrated.Nickel chloride solution after concentrated is delivered in Pneumatic feeding device through preconcentrator line strainer by preconcentrator recycle pump, then is sprayed into stoving oven through furnace roof flusher from stoving oven top by Pneumatic feeding device.
There is lower column defects in existing nickel oxide production technique and device:
1) what existing production technique adopted is chemical synthesis, and the technological process of production is long, and cost is higher;
2) chlorine contained exhaust gas producing in preparation process need neutralize with alkali, and the clorox producing after neutralization causes secondary pollution to environment;
3) in the crystallisation process of nickelous chloride, can not guarantee that epigranular degree reaches more than 85%;
4) owing to there being chlorion to produce in original production process, the equipment of unit is caused to corrosion;
5) in the crystallisation process of nickelous chloride, adopt open steam type of heating, air and environment are caused to very large pollution;
6) feed pipeline can form xln in the course of the work in pipeline, causes line clogging, necessary routine cleaning pipeline, and cleaning maintenance work is very difficult, workload is large, pipeline must be disassembled and uses artificial pipe blow-through, and time-consuming, expense is expected, is taken a lot of work.
Therefore must be improved.
Application for a patent for invention 200710157229.6 discloses a kind of continuous production processes and equipment thereof of preparing cobaltosic oxide powder by spray roasting.Production technique comprises solution collection, filtration, pre-concentration, oven dry, in the heating region of stoving oven, solution resolves into Co3O4 and HCl, solid Co3O4 particle reclaim with powder type, roasting gas enters preconcentrator, in this, high-temperature gas directly contacts with recycle acid, and cooling and purge gas enters in absorption tower, the hydrogenchloride that rinse water absorb in gas forms regeneration hydrochloric acid, gas discharge after smoke evacuation drop separation, washing, and whole technological process comprises the following steps:
1) send into preconcentrator through filter or after dust catcher is caught dirt, send into again preconcentrator from the spent acid of spent acid tank,
2) by Pneumatic feeding device, filtered spent acid is sent in stoving oven,
3) utilize the temperature-control device that is located at stoving oven middle part that the temperature in the heating region of stoving oven is controlled to 600～1300 ℃, furnace roof negative pressure control is built in 280MPa,
4) the solid Co3O particle that the solid that spent acid generates at roasting kiln roasting obtains through chlorine purifier dechlorination reclaims with powder type, and roasting gas enters preconcentrator after cyclone separator, dust catcher are caught dirt again,
5) the roasting gas that enters preconcentrator directly contacts with recycle acid, and cooling and purge gas enters in absorption tower, and the hydrogenchloride that rinse water absorb in gas forms regeneration hydrochloric acid,
6) from the discharge after smoke evacuation drop separation, washing again after two-level absorption tower of absorption tower expellant gas.
Equipment comprises oxide blocks crusher, cobaltosic oxide pneumatic conveyor system, absorption tower, smoke exhaust fan, washing tower, rinse water water supply installation, regeneration hydrochloric acid tank, gas-liquid separator, chimney, the PLC control device of collecting spent acid tank, waste acid filter, preconcentrator, pneumatic adjusting valve, stoving oven and the furnace roof flusher thereof of solution, the burner that is tangent line layout on stoving oven body, rotary valve, stoving oven bottom.
A dust catcher is set between spent acid tank and preconcentrator, and the roasting gas piping of stoving oven therewith dust catcher is connected.
On the combustion air pipeline being connected with stoving oven, air purifier is set.
A chlorine purifier is set between oxide blocks crusher and cobaltosic oxide pneumatic conveyor system.
Between absorption tower and smoke exhaust fan, two-level absorption tower is set.
Logical trial run in a few years, find that this equipment and Technology exist following problems:
1) some processing parameters are not suitable for and prepare nickel oxide, for example: the furnace roof negative pressure control of stoving oven is built in 280MPa, and this is impossible realize;
2) furnace bottom oxide compound discharging method is unreasonable.Original discharging method is by air blowback and the material form of naturally falling, this method is not suitable for the production of nonferrous metal oxides, because nonferrous metal oxides temperature of reaction is very high, the impact of oxidated thing proportion, temperature, pattern, viscosity etc. in the time that finished product is come out of the stove, be easy to cause discharge port to stop up, want fundamentally to address this problem the necessary mechanical system that adopts;
3) cyclonic separator prevents that wall built-up, putty mode are unreasonable, original discharging is that a vibrator by being arranged on cyclonic separator bottom completes, this mode not only can not solve obstruction, and aggravation is stopped up on the contrary, and this is because in cyclonic separator, oxide compound proportion is low, granularity is little;
4) water spot of giving of water circulation system cannot be realized circulation.
Summary of the invention
The object of the present invention is to provide a kind ofly can improve the quality of products, the utilizing nickel chloride solution to prepare nickel oxide product and reclaim the equipment of hydrochloric acid of stable technical process, energy-saving and cost-reducing, low-carbon emission reduction.
The object of the invention is to realize by following technical proposals:
According to the equipment that utilizes nickel chloride solution to prepare nickel oxide product and recovery hydrochloric acid of the present invention, comprise stoving oven, the combustion air pipeline that stoving oven is connected therewith respectively, natural gas line, cyclone separator, is located on this stoving oven body and is the burner that tangent line is arranged, is located at the discharging equipment of this stoving oven bottom, the oxidation nickel block crusher that discharging equipment is connected therewith and the chlorine remover connecting successively, oxidate powder pneumatic conveyor system, feed bin, wrapping machine, fly-ash separator, nickel chloride solution tank, the solution strainer that nickel chloride solution tank is connected therewith, preconcentrator, the Pneumatic feeding device that preconcentrator is connected therewith, the furnace roof flusher of the stoving oven that Pneumatic feeding device is connected therewith, described Pneumatic feeding device is connected with pneumatic line, the first grade absorption tower being connected with preconcentrator successively, two-level absorption tower, smoke exhaust fan, droplet separator, washing tower, radially gas-liquid separator, the water supply installation that washing tower is connected therewith, the regeneration hydrochloric acid tank that first grade absorption tower is connected therewith, regenerant salt acid tube road, PLC control device, the furnace temperature detection control apparatus that PLC control device is connected therewith, is located at the back blowing flow device of stoving oven lower end, is located at the combustion-supporting warming apparatus in middle part of stoving oven, the on-line cleaning device of stoving oven feed pipeline,
It is characterized in that:
1) discharging equipment of described stoving oven furnace bottom is that rotary level stirs material stripping mechanism, and this rotary level stirs material stripping mechanism and is connected with oxidate powder pneumatic conveyor system with oxide blocks crusher by two rotary valves,
2) described solution strainer is a nickel chloride solution fine filter,
3) described cyclone separator, the gas piping of this cyclone separator is connected with dust catcher, and this dust catcher is connected with described preconcentrator, and the solid oxidation nickel pipeline of this cyclone separator is connected with described stoving oven,
4) burner blower, air heating cleaner are set on the combustion air pipeline being connected with described stoving oven,
5) circulation tank pump seal water cycle re-use device is set between described first grade absorption tower and two-level absorption tower, circulation tank pump seal water cycle re-use device is connected with first grade absorption tower by return water pipe, first grade absorption tower is connected with described preconcentrator by pipeline
Described smoke exhaust fan liquid exit returns to two-level absorption tower by pipeline, and described smoke exhaust fan pneumatic outlet is connected with droplet separator,
6) described washing tower is connected with two-level absorption tower by circulation tank,
7) pneumatic outlet of described washing tower is connected with gas-liquid separator radially, radially the de-mineralized water entrance of gas-liquid separator and de-mineralized water or the soft water pipeline of described water supply installation are connected for these, the pneumatic outlet of this radial separation device is connected with chimney, the liquid exit of this radial separation device is connected with described washing tower by return pipeline
8) described water supply installation comprises two de-mineralized waters or soft water pipeline and a feed water filter being connected in de-mineralized water or soft water pipeline therewith, and this feed water filter is connected with described washing tower.
The furnace shell of described stoving oven is stainless steel furnace shell, is added with antiseptic wearable coat at stainless steel furnace shell internal surface simultaneously.
Described Pneumatic feeding device comprises the compressed air inlet pipe being connected with described nickel chloride solution tank, be located at the air filter on this compressed air inlet pipe, the bleed pressure being connected with described stoving oven furnace roof flusher by source of the gas pipeline, Flow-rate adjustment controlling box, this bleed pressure, Flow-rate adjustment controlling box is connected with described air filter, be located at the bleed pressure table on this source of the gas pipeline, gas source and flow amount meter, the stoving oven feeding pump being connected with described stoving oven furnace roof flusher by furnace charge pipeline, be located at the feeding pressure table on this furnace charge pipeline, feed under meter, feed valve, described bleed pressure, Flow-rate adjustment controlling box, stoving oven feeding pump, bleed pressure table, gas source and flow amount meter, feeding pressure table, feed under meter, feed valve is all connected with described PLC control device.
Described rotary level stirs material stripping mechanism by the motor-speed reducer being located under the furnace bottom of described stoving oven, the horizontal agitating vane that the transmission shaft of step-down gear is connected therewith, the powder receiving tank that the oxidate powder pneumatic conveyor system with described under the furnace bottom of the stoving oven described in being located at is connected, the rotary valve being located in this oxidate powder pneumatic conveyor system forms, the transmission shaft of described step-down gear enters in stove through the furnace bottom of described stoving oven
Described motor is frequency control motor,
The transmission shaft of described step-down gear is provided with axle sleeve, and this axle sleeve is the axle sleeve of cooling air circulating sleeve structure, and the junction of the furnace bottom of this axle sleeve and described stoving oven arranges the high temperature resistant packing line of nickel wire dust seal disrupter.
Described circulation tank pump seal water cycle re-use device is by sealing water cycle groove, seal therewith by new penstock the new water lines that water cycle groove is connected, seal therewith by backwater valve the water return pipeline that water cycle groove is connected, the cooling pump housing, the induction valve door that the cooling pump housing is connected therewith form, described water return pipeline one end is connected with two-level absorption tower, the other end is connected with the cooling pump housing, and the other end of described induction valve door is connected with first grade absorption tower.
In described water return pipeline, be provided with pH value tester,
In described circulation line, be provided with pressure-detecting device PT, flow detector LT,
Side at described sealing water cycle groove is provided with the upflow tube for process safety exhaust.
Described chlorine remover is microwave chlorine remover, infrared chlorine remover or combustion gas chlorine remover.
According to equipment of the present invention, adopt rotary level to stir material stripping mechanism nickel oxide is evenly discharged as requested continuously; Adopt nickelous chloride and chlorine contained exhaust gas to exchange absorption, the chlorion in waste gas can be adsorbed; Adopt the absorption of waste gas secondary, two-step purification washing, can make exhaust gas emission reach low-carbon emission reduction and meet national environmental standard; Adopt de-mineralized water (or soft water) circulation to go forward one by one and recycle this technique, unit de-mineralized water (or soft water) consumption is reduced; Adopt all feeding pump sealings and this technology of cooling water circulation use, make unit non-wastewater discharge in process of production.
Back blowing flow device is by the back blowing flow entrance that is located at stoving oven lower end, one end therewith back blowing flow gas inlet is connected and blowback airline that the other end and compression sky source is connected, be located at tensimeter on this blowback airline and control variable valve or the pulse valve composition of flow, by the pressure-controlling of blowback air at 0.2MPa～0.8MPa scope Inner.
Combustion air adds heat purifying instrument by the combustion air entrance that is located at stoving oven middle part, one end therewith combustion air entrance is connected and combustion air pipeline that the other end is connected with burner blower, be located at air gauge, under meter, variable valve composition on this combustion air pipeline, air pressure scope control is at 5kPa～10kPa.
Stoving oven feed pipeline on-line cleaning device is by clean-out system circulation tank, the feeding pump that clean-out system circulation tank is connected therewith, the stoving oven feed pipeline that feeding pump is connected therewith, the new water lines that stoving oven feed pipeline is connected therewith, one end scavenging solution return line that the end of stoving oven feed pipeline is connected therewith, the clean-out system circulation tank that the other end of scavenging solution return line is connected therewith forms, and forms an online cleaning system of circulation.
According to the equipment that utilizes nickel chloride solution to prepare nickel oxide and recovery hydrochloric acid of the present invention, there is following feature:
1) nickel chloride solution is delivered in Pneumatic feeding device through preconcentrator line strainer by preconcentrator recycle pump, then is sprayed into stoving oven through furnace roof flusher from stoving oven top by Pneumatic feeding device;
2) on stoving oven body, be tangent line and arrange two or three burners, the heat roasting producing when burning is sprayed the nickel chloride solution after being concentrated from Pneumatic feeding device through furnace roof flusher, and in the heating region of stoving oven (500 ℃～1600 ℃), nickel chloride solution resolves into solid particulate nickel oxide and hydrogen chloride gas.Solid oxidation nickel particle drops on stoving oven bottom, and stirs stripping machine by a rotary level material is emitted through rotary valve in stove, and is directly entered in chlorine remover by chlorine remover afterbody;
3) nickel oxide material enters after chlorine remover dechlorination, and qualified nickel oxide powder enters finished product classifying bunker;
4) the stoving oven gas producing when roasting leaves stoving oven from the top of stoving oven and enters cyclone separator, between stoving oven and cyclone separator, be connected with stainless steel pipes, the nickel oxide powder being separated is by being arranged on a rotary valve of cyclone separator bottom
afterturn back in stoving oven by stainless steel pipes;
5) high-temperature roasting gas forms negative pressure by the smoke exhaust fan being arranged on after two-level absorption tower, enter preconcentrator by cyclone separator, between cyclone separator and preconcentrator, be connected with stainless steel tube, for preventing high-temperature expansion, on pipeline, install a stainless steel expansion joint additional, simultaneously for prevent unit failure stop time high-temperature gas enter back segment equipment, a pneumatic cut-off valve is installed below expansion joint simultaneously, once there is accident, valve is closed braking by chain control, prevents that high-temperature gas from entering back segment equipment;
6) 4 nozzles are installed on preconcentrator top, nickel chloride solution is by nozzle tee section, high-temperature roasting gas directly forward contacts with nickel chloride solution, furnace gas is chlorinated nickel solution cooling (cooling rear temperature is 80～105 ℃), be cooled and clean after gas enter absorption tower by preconcentrator middle part by PPH pipe connecting subsequently, a temperature monitor, a pressure detection table are installed on pipe connecting, for detection of the temperature in preconcentrator and pressure;
7) furnace gas extremely upwards flows from bottom, absorption tower by smoke exhaust fan, de-mineralized water by absorber feed pump from top, absorption tower in nozzle sprays into tower, de-mineralized water is uniformly distributed on the filler being sprayed in absorption tower, the hydrogenchloride composition in countercurrent flow is absorbed formation regenerating acid (a time specific absorption is more than 99.5 ﹪) and certainly flow to regenerating acid storage tank from bottom, absorption tower through pneumatic cut-off valve;
8) furnace gas that contains micro-hydrogenchloride enters two-level absorption tower bottom from first grade absorption tower top by PPH pipe connecting, gas flows from the bottom to top in two-level absorption tower, in flow process, carrying out area with de-mineralized water contacts, de-mineralized water by two-level absorption tower feeding pump from two-level absorption tower top in nozzle enters tower, de-mineralized water is uniformly distributed on the filler being sprayed in two-level absorption tower, remaining hydrogenchloride composition in countercurrent flow gas is absorbed, and the liquid that contains micro-hydrogenchloride is for to first grade absorption tower periodical feeding;
9) two-level absorption tower sprinkling is to obtain from circulating storage tank with de-mineralized water, and circulating storage tank water-in is connected in wash tower bottoms outlet;
10) passed through smoke exhaust fan, enter washing tower by wash tower bottoms by the waste gas after double absorption, reverse discharge enters atmosphere.
For hydrogen chloride gas in assurance system can not be revealed, whole system is negative pressure operation.
Advantage of the present invention is:
1) owing to a dust catcher being set between nickel chloride solution tank and preconcentrator and on combustion air pipeline, air purifier being set, absorb the grit in nickel chloride solution and stoving oven furnace gas, realize final dusting, made the waste gas dustiness of final discharge reach discharging standards;
2) stir material stripping mechanism material is emitted through a rotary valve in stove owing to being provided with a rotary level in stoving oven bottom, this rotary level stirs stripping machine and adopts frequency control motor control, the speed of rotation that stirs stripping machine by control is controlled the residence time of material in stove, thereby controls cl content, the pattern of product and the quality of nickel oxide in material;
3), owing to being provided with a chlorine remover, make the cl content in nickelous-nickelic oxide or nickel protoxide reach electronic grade product standard;
4) owing between first grade absorption tower and smoke exhaust fan, two-level absorption tower being set, realize double absorption, improved specific absorption, also further reduced the chloride ion content in discharge furnace gas;
5) owing to being provided with back blowing flow device in the lower end of stoving oven, middle part is provided with combustion-supporting warming apparatus, makes the material reaction in stoving oven more fully complete, mobile more smooth and easy, and efficiency is higher, better effects if;
6) be provided with stoving oven feed pipeline on-line cleaning device, can carry out on-line cleaning to stoving oven feed pipeline at any time, not only improve production operational availability and continuity, and reduced pipeline cleaning maintenance load and relevant maintenance cost, guaranteed that oxide compound quality is consistent simultaneously;
7) owing to changing feeding pump feed into pneumatic feeding, not only make stoving oven work continuously, improve the stability of feed, but also can give supplemental oxygen in stoving oven, thereby further improved plant factor and the working efficiency of stoving oven;
8), because the furnace shell of stoving oven is stainless steel, in stove, stainless steel surface is added with antiseptic wearable coat simultaneously, therefore can avoid polluting furnace charge because furnace shell is corroded.
Adopt the performance index Fe of the prepared nickel oxide series product of equipment of the present invention to be not more than 5ppm; Cl is not more than 100ppm; Magnetic foreign body is not more than 500ppb.
Accompanying drawing explanation
Fig. 1 is equipment flowsheet of the present invention.
Fig. 2 is the structural representation of Pneumatic feeding device of the present invention and dumping device.
Fig. 3 is the structural representation of circulation tank pump seal water cycle re-use device of the present invention.
Embodiment
The embodiment given below in conjunction with accompanying drawing further illustrates the specific embodiment of the present invention.
As Fig. 1, shown in 2 and 3, the equipment that utilizes nickel chloride solution to prepare nickel oxide and recovery hydrochloric acid of the present invention, comprise stoving oven 24, the combustion air pipeline 20 that stoving oven 24 is connected therewith respectively, natural gas line 22, cyclone separator 19, be located at the burner that is tangent line layout on these stoving oven 24 bodies, be located at the discharging equipment of this stoving oven bottom, the oxidation nickel block crusher that discharging equipment is connected therewith and the chlorine remover 25 connecting successively, oxidate powder pneumatic conveyor system 249, feed bin 27, wrapping machine 28, fly-ash separator 26, nickel chloride solution tank 15, the solution strainer 16 that nickel chloride solution tank 15 is connected therewith, preconcentrator 17, the Pneumatic feeding device 30 that preconcentrator 17 is connected therewith, the furnace roof flusher of the stoving oven that Pneumatic feeding device 30 is connected therewith, described Pneumatic feeding device 30 is connected with pneumatic line 31, the first grade absorption tower 14 being connected with preconcentrator 17 successively, two-level absorption tower 11, smoke exhaust fan 10, droplet separator 9, washing tower 8, radially gas-liquid separator 2, the water supply installation 1 that washing tower 8 is connected therewith, the regeneration hydrochloric acid tank 13 that first grade absorption tower 14 is connected therewith, regenerant salt acid tube road 12, PLC control device, the furnace temperature detection control apparatus that PLC control device is connected therewith, be located at the back blowing flow device of stoving oven lower end, be located at the combustion-supporting warming apparatus in middle part of stoving oven, the on-line cleaning device (not shown) of stoving oven feed pipeline, it is characterized in that:
1) discharging equipment of described stoving oven 24 furnace bottoms is that rotary level stirs material stripping mechanism, this rotary level stirs material stripping mechanism and is connected with oxidate powder pneumatic conveyor system 249 with described oxide blocks crusher by two rotary valves 245, these two rotary valves 245 are as sealing and the discharge mechanism of stoving oven 24, material is iron-free special alloy GH605
) discharging equipment of described stoving oven furnace bottom is that rotary level stirs material stripping mechanism, this rotary level stirs material stripping mechanism and is connected with oxidate powder pneumatic conveyor system by two rotary valves, and these two rotary valves are as sealing and discharge mechanism,
2) described solution strainer is nickel chloride solution fine filter,
2) described solution strainer 16 is a nickel chloride solution fine filter,
3) described cyclone separator 19, the gas piping 23 of this cyclone separator 19 is connected with dust catcher 18, this dust catcher 18 is connected with described preconcentrator 17, and the solid oxidation nickel pipeline 33 of this cyclone separator 19 is connected with described stoving oven 24
4) on the combustion air pipeline being connected with described stoving oven 24, burner blower 32, air heating cleaner 21 are set,
5) circulation tank pump seal water cycle re-use device 37 is set between described first grade absorption tower 14 and two-level absorption tower 11, circulation tank pump seal water cycle re-use device 37 is connected with first grade absorption tower 14 by return water pipe 35, first grade absorption tower 14 is connected with described preconcentrator 17 by pipeline 36
Described smoke exhaust fan 10 liquid exits return to two-level absorption tower 11 by pipeline 34, and described smoke exhaust fan 10 pneumatic outlets are connected with droplet separator 9,
6) described washing tower 8 is connected with two-level absorption tower 11 by circulation tank 38,
7) pneumatic outlet of described washing tower 8 is connected with gas-liquid separator 2 radially, radially the de-mineralized water entrance of gas-liquid separator 2 and de-mineralized water or the soft water pipeline of described water supply installation 1 are connected for these, the pneumatic outlet of this radial separation device 2 is connected with chimney 29, the liquid exit of this radial separation device 2 is connected with described washing tower 8 by return pipeline
8) described water supply installation 1 comprises two de-mineralized waters or soft water pipeline 3 and a feed water filter being connected 4 in de-mineralized water or soft water pipeline 3 therewith, and this feed water filter 4 is connected with described washing tower 8.
The furnace shell of described stoving oven 24 is stainless steel furnace shell, is added with antiseptic wearable coat at stainless steel furnace shell internal surface simultaneously.
As Fig. 1, shown in 2, described Pneumatic feeding device 30 comprises the compressed air inlet pipe 31 being connected with described nickel chloride solution tank, be located at the air filter on this compressed air inlet pipe 31, the bleed pressure being connected with described stoving oven 24 furnace roof flushers by source of the gas pipeline 303, Flow-rate adjustment controlling box 301, this bleed pressure, Flow-rate adjustment controlling box 301 is connected with described air filter, be located at the bleed pressure table PLI on this source of the gas pipeline 303, gas source and flow amount meter 302, the stoving oven feeding pump 304 being connected with described stoving oven 24 furnace roof flushers by furnace charge pipeline 307, be located at the feeding pressure table on this furnace charge pipeline 307, feed under meter 306, feed valve 305, described bleed pressure, Flow-rate adjustment controlling box 301, stoving oven feeding pump 304, bleed pressure table PLI, gas source and flow amount meter 302, feeding pressure table, feed under meter 306, feed valve 305 is all connected with described PLC control device.
As shown in Figure 2, described rotary level stirs material stripping mechanism by the motor 247-step-down gear 246 being located under the furnace bottom of described stoving oven 24, the horizontal agitating vane 241 that the transmission shaft 242 of step-down gear 246 is connected therewith, powder receiving tank 248 in the furnace bottom of the stoving oven 24 described in being located at, the powder delivery system 249 that powder receiving tank 248 is connected therewith, the rotary valve 245 being located in this powder delivery system 249 forms, the transmission shaft 242 of this step-down gear 246 enters in stove through the furnace bottom of described stoving oven 24
Described motor 247 is frequency control motor, and this frequency control motor is connected with described PLC control device,
The transmission shaft 242 of described step-down gear 246 is established Packed axle sleeve 244 with the junction of the furnace bottom of described stoving oven 24, this axle sleeve 244 is cooling air circulating sleeve structure, and this axle sleeve 244 arranges the high temperature resistant packing line of nickel wire dust seal isolation 243 with the junction of described furnace bottom.
As shown in Figure 3, described circulation tank pump seal water cycle re-use device 37 is by sealing water cycle groove 372, seal therewith by new penstock 373 the new water lines 374 that water cycle groove 372 is connected, seal therewith by backwater valve 376 water return pipeline 378 that water cycle groove 372 is connected, the cooling pump housing 379,375 levels of induction valve door that the cooling pump housing 379 is connected therewith become, described water return pipeline 378 one end are connected with two-level absorption tower 11, the other end is connected with the cooling pump housing 379, and the other end of described induction valve door 375 is connected with first grade absorption tower 14.
In described water return pipeline, be provided with pH value tester 377,
In described circulation line, be provided with pressure-detecting device PT, flow detector LT,
Side at described sealing water cycle groove is provided with the upflow tube 371 for process safety exhaust.
Described de-mineralized water or soft water pipeline are connected with washing tower moisturizing spray thrower, de-mineralized water or soft water water supply installation are connected with strainer respectively, strainer is connected with washing tower wash spray pipe respectively, the acid tube road of sending of pyrolysis acid storage tank is connected with nickelous chloride production line, nickel oxide powder pneumatic transport gathering system is connected with nickel oxide powder packing plant with fly-ash separator respectively, and gas line is connected with stoving oven.
Described chlorine remover 25 is microwave chlorine remover, infrared chlorine remover or combustion gas chlorine remover.
The technology and equipment of preparing nickel oxide product and reclaiming hydrochloric acid of the present invention, the temperature of reaction of stoving oven is more stable, has expanded the regulation range of temperature of reaction; The waste gas of discharge reaches emission standard; Improve the plant factor of stoving oven; Can environment not produced and be polluted.
Claims (7)
1. utilize nickel chloride solution to prepare an equipment for nickel oxide product and recovery hydrochloric acid, comprise stoving oven, the combustion air pipeline that stoving oven is connected therewith respectively, natural gas line, cyclone separator, be located on this stoving oven body and be the burner that tangent line is arranged, be located at the discharging equipment of this stoving oven bottom, the oxidation nickel block crusher that discharging equipment is connected therewith and the oxidate powder pneumatic conveyor system connecting successively, chlorine remover, feed bin, wrapping machine, fly-ash separator, nickel chloride solution tank, the solution strainer that nickel chloride solution tank is connected therewith, preconcentrator, the Pneumatic feeding device that preconcentrator is connected therewith, the furnace roof flusher of the stoving oven that Pneumatic feeding device is connected therewith, the first grade absorption tower being connected with preconcentrator successively, two-level absorption tower, smoke exhaust fan, washing tower, radially gas-liquid separator, the water supply installation that washing tower is connected therewith, the regeneration hydrochloric acid tank that first grade absorption tower is connected therewith, PLC control device, the furnace temperature detection control apparatus that PLC control device is connected therewith, is located at the back blowing flow device of stoving oven lower end, is located at the combustion-supporting warming apparatus in middle part of stoving oven, the on-line cleaning device of stoving oven feed pipeline, is characterized in that:
1) discharging equipment of described stoving oven furnace bottom is that rotary level stirs material stripping mechanism, and this rotary level stirs material stripping mechanism and is connected with oxidate powder pneumatic conveyor system by two rotary valves, and these two rotary valves are as sealing and discharge mechanism,
2) described solution strainer is nickel chloride solution fine filter,
3) gas piping of described cyclone separator is connected with dust catcher, and this dust catcher is connected with described preconcentrator, and the solid oxidation nickel pipeline of this cyclone separator is connected with described stoving oven,
4) burner blower, air heating cleaner are set on the combustion air pipeline being connected with described stoving oven,
5) circulation tank pump seal water cycle re-use device is set between described first grade absorption tower and two-level absorption tower,
6) described washing tower is connected with two-level absorption tower by circulation tank,
7) outlet of described washing tower is connected with gas-liquid separator radially, radially the de-mineralized water entrance of gas-liquid separator and de-mineralized water or the soft water pipeline of described water supply installation are connected for these, this radially the pneumatic outlet of gas-liquid separator be connected with chimney, this radially the liquid exit of gas-liquid separator be connected with described washing tower by return pipeline
8) described water supply installation comprises two de-mineralized waters or soft water pipeline and a feed water filter being connected in de-mineralized water or soft water pipeline therewith, and this feed water filter is connected with described washing tower.
2. according to claim 1 for utilizing nickel chloride solution to prepare the equipment of nickel oxide product and recovery hydrochloric acid, the furnace shell of the stoving oven described in it is characterized in that is stainless steel furnace shell, and in stove, stainless steel surface is added with antiseptic wearable coat simultaneously.
3. according to claim 1 for utilizing nickel chloride solution to prepare the equipment of nickel oxide product and recovery hydrochloric acid, it is characterized in that described Pneumatic feeding device comprises the compressed air inlet pipe being connected with described nickel chloride solution tank, be located at the air filter on this compressed air inlet pipe, the bleed pressure being connected with described stoving oven furnace roof flusher by source of the gas pipeline, Flow-rate adjustment controlling box, this bleed pressure, Flow-rate adjustment controlling box is connected with described air filter, be located at the bleed pressure table on this source of the gas pipeline, gas source and flow amount meter, the stoving oven feeding pump being connected with described stoving oven furnace roof flusher by furnace charge pipeline, be located at the feeding pressure table on this furnace charge pipeline, feed under meter, feed valve, described bleed pressure, Flow-rate adjustment controlling box, stoving oven feeding pump, bleed pressure table, gas source and flow amount meter, feeding pressure table, feed under meter, feed valve is all connected with described PLC control device.
4. according to claim 1 for utilizing nickel chloride solution to prepare the equipment of nickel oxide product and recovery hydrochloric acid, it is characterized in that described rotary level stirs material stripping mechanism by the motor-speed reducer being located under the furnace bottom of described stoving oven, the horizontal agitating vane that the transmission shaft of step-down gear is connected therewith, the powder receiving tank that the oxidate powder pneumatic conveyor system with described under the furnace bottom of the stoving oven described in being located at is connected, the rotary valve being located in this oxidate powder pneumatic conveyor system forms, the transmission shaft of described step-down gear enters in stove through the furnace bottom of described stoving oven,
Described motor is frequency control motor,
The transmission shaft of described step-down gear is provided with axle sleeve, and this axle sleeve is the axle sleeve of cooling air circulating sleeve structure, and the junction of the furnace bottom of this axle sleeve and described stoving oven arranges the high temperature resistant packing line of nickel wire dust seal disrupter.
5. according to claim 1 for utilizing nickel chloride solution to prepare the equipment of nickel oxide product and recovery hydrochloric acid, it is characterized in that described circulation tank pump seal water cycle re-use device is by sealing water cycle groove, seal therewith by new penstock the new water lines that water cycle groove is connected, seal therewith by backwater valve the water return pipeline that water cycle groove is connected, the cooling pump housing, the induction valve door that the cooling pump housing is connected therewith forms, described water return pipeline one end is connected with two-level absorption tower, the other end is connected with the cooling pump housing, the other end of described induction valve door is connected with first grade absorption tower,
In described water return pipeline, be provided with pH value tester,
In described circulation line, be provided with pressure-detecting device PT, flow detector LT,
Side at described sealing water cycle groove is provided with the upflow tube for process safety exhaust.
6. according to claim 1 for utilizing nickel chloride solution to prepare the equipment of nickel oxide product and recovery hydrochloric acid, it is characterized in that described de-mineralized water or soft water pipeline are connected with washing tower moisturizing spray thrower, de-mineralized water or soft water water supply installation are connected with strainer respectively, strainer is connected with washing tower wash spray pipe respectively, the acid tube road of sending of pyrolysis acid storage tank is connected with nickelous chloride production line, nickel oxide powder pneumatic transport gathering system is connected with nickel oxide powder packing plant with fly-ash separator respectively, and gas line is connected with stoving oven.
7. according to claim 1 for utilizing nickel chloride solution to prepare the equipment of nickel oxide product and recovery hydrochloric acid, it is characterized in that described chlorine remover is microwave chlorine remover, infrared chlorine remover or combustion gas chlorine remover.
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| CN101164902A (en) * | 2007-09-30 | 2008-04-23 | 赫东波 | Continuous producing technique and device for preparing cobaltosic oxide powder by spray roasting |
| CN201095598Y (en) * | 2007-09-30 | 2008-08-06 | 赫东波 | On-line cleaning device for feed pipe of roasting furnace for preparing cobaltosic oxide powder |
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| JP5621268B2 (en) * | 2010-02-03 | 2014-11-12 | 住友金属鉱山株式会社 | Nickel oxide fine powder and method for producing the same |
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