CN102620574B - Residue discharge and heat recovery method of pyrite acid production and equipment system - Google Patents

Residue discharge and heat recovery method of pyrite acid production and equipment system Download PDF

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CN102620574B
CN102620574B CN2012101314558A CN201210131455A CN102620574B CN 102620574 B CN102620574 B CN 102620574B CN 2012101314558 A CN2012101314558 A CN 2012101314558A CN 201210131455 A CN201210131455 A CN 201210131455A CN 102620574 B CN102620574 B CN 102620574B
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temperature
cooling
slag
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waste heat
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CN102620574A (en
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陈亮
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Jiangsu Jinglong Alloy Steel Machinery Manufacturing Co., Ltd.
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陈亮
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Abstract

The invention provides a residue discharge and heat recovery method of pyrite acid production and an equipment system for realizing the method. High-temperature dust-laden gas discharged from a roasting furnace is subjected to heat exchange of a waste heat boiler and dust collection and then is discharged; dust is collected through a cyclone separator and an electric dust collector in sequence; high-temperature ash residue discharged from the roasting furnace and the waste heat boiler is cooled through a first high-temperature material cooler; meanwhile, the high-temperature ash residue discharged from the cyclone separator and the electric dust collector is cooled through a second high-temperature material cooler; the cooled ash residue is conveyed to a destination by a closed conveying device to be reutilized; and meanwhile, cooling water heated by the high-temperature material coolers directly enters a deoxidation and water replenishing system of the waste heat boiler to fulfill the aim of heat recovery. According to the residue discharge and heat recovery method of pyrite acid production and the equipment system, environmental pollution produced by residue discharge treatment in a pyrite acid production process is reduced, and the residue discharge heat recovery and utilization rate can be efficiently increased.

Description

Pyrite-based sulfuric acid production deslagging heat recovery method and device systems
Technical field
The present invention relates to processing and the thermal cycle utilization of solid waste in the pyrite-based sulfuric acid production process, relate in particular to deslagging and the heat recovering technique of fired slags and its supporting waste heat boiler high temperature sludge in the pyrite-based sulfuric acid production process.
The invention still further relates to the device systems of realizing above-mentioned deslagging heat recovering process method.
Background technology
In the pyrite-based sulfuric acid production process, need in order to take full advantage of waste heat, save energy and reduce the cost in roasting process with troilite at the roasting kiln roasting, generally waste heat boiler and steam turbine power generation will be set, to realize the coproduction of acid, heat, electricity.in the pyrite-based sulfuric acid production process, due to roaster and a large amount of waste residue of waste heat boiler generation, the solid waste that pyrite-based sulfuric acid production produces is that the high-temperature roasting slag is the puzzlement enterprise production management always, the difficult problem of field management and the environmental protection comprehensive regulation, main cause is the fired slags temperature high (850 ℃-1100 ℃) of roaster and waste heat boiler institute output, fine size (200 orders-500 order), original processing mode mostly is greatly the hydraulic discharged slag formula or slag is directly carried out water drenches humidification, cause production scene airborne dust and water, vapour, the dirt multiple contaminates, because of water, vapour, the dirt middle acid substance is more, corrosion to field apparatus is very serious, environment is caused very large pollution.And because directly carrying out trickle or hydraulic discharged slag, high temperature sludge causes a large amount of water resource waste, and polluted source, if carry out water treatment, Meteorological is high, causes a large amount of heats to run off.Must carry out drying and processing if need to re-use through the slag after hydraulic discharged slag or water pouring humidification, the drying and processing input cost is high.
Chinese patent application 200910102626.2 discloses the method for transporting dregs in a kind of pyrite-based sulfuric acid production, roaster high temperature slag by cold slag machine cooling and reclaim heat after, directly enter Belt Conveying to set stockyard; Useless pot, electric dirt slag are cooling by immersed-type cooling cylinder separately, enter belt after humidification, send into set stockyard; The method can realize the slag ash content from, and the heat energy of high temperature slag obtains partially recycled utilization, and certain environmental benefit is arranged, but it thoroughly solves the cooling and recuperation of heat problem of thin slag.
Chinese patent application 200910115313.0 discloses a kind of method and device of dry-type slag discharge through air delivery, comprise to slag cooling, carry and store, it send the fired slags cooler cooling fired slags, by scratch board conveyor, cooled slag is delivered to intermediate bin, the slag that with air-flow, intermediate bin is stored again is delivered to the target storehouse, concentrates at last outwards transportation.The method has realized the omnidistance dried slag removing of pyrite-based sulfuric acid production roaster and waste heat boiler, but the air-flow mode of movement that it adopts requires corresponding device systems that higher seal is arranged, otherwise can cause larger environmental pollution, also easily stop because the equipment seal failure causes the equipment operation, impact is normally produced.
Summary of the invention
The object of the present invention is to provide that a kind of temperature that produces for pyrite-based sulfuric acid production process roaster and waste heat boiler is high, the deslagging of fine size, both the process of dried slag removing and heat recovery, processed with deslagging in solution pyrite-based sulfuric acid production process environmental pollution and the lower problem of deslagging recuperation of heat utilization rate that is produced.
Pyrite-based sulfuric acid production is that troilite (comprising pyrite concentrate) is sent into roasting in roaster, generates slag and impure sulfur dioxide gas.Its first deslagging point is the roaster slag-drip opening, and deslagging temperature is about 800~900 ℃.The roasting oven top discharge temperature approximately sulfur dioxide dusty gas of 900~1000 ℃ enters waste heat boiler and reclaims heat and gather dust, so the second deslagging point of system is the waste heat boiler slag-drip opening, and deslagging temperature is about 600~650 ℃.The dusty gas that goes out waste heat boiler enters electric cleaner and gathers dust after cyclone dust collectors gather dust, last gas enters the cleaning procedure dilute acid pickling purifying.Therefore, the 3rd and the 4th slag-drip opening of system is respectively cyclone dust collectors and electric cleaner ash discharging hole, approximately 300~600 ℃ of ash discharge slag temperature.
Be the Thermal Synthetic recovery utilization rate of raising whole system, and environmental contamination reduction, the present invention implements by the following technical programs:
The high-temperature dusty gas that roaster is discharged is discharged through residual heat boiler for exchanging heat, after gathering dust, and gathers dust through cyclone separator and electric cleaner successively, and roaster and the waste heat boiler high-temperature ash of discharging is cooling through cooler simultaneously; Wherein: the high-temperature ash that roaster and waste heat boiler are discharged is cooled to 80 ℃-60 ℃ through the first high temperature material cooling apparatus, and the high-temperature ash of being discharged by cyclone separator and electric cleaner simultaneously is cooled to 80 ℃-60 ℃ through the second high temperature material cooling apparatus; Cooled lime-ash is delivered to the destination by the closed conveying device; Its concrete steps comprise:
The first step is by the about warm sludge of 800~900 ℃ of roaster slag-drip opening discharge temperature; Simultaneously by the about dust-laden sulfur dioxide gas of 900~1000 ℃ of roasting oven top discharge temperature, enter waste heat boiler via the high-temperature dusty gas pipeline and carry out heat recovery and gather dust, the dust-laden dioxy
Change the sulphur gas temperature and be cooled to 600~700 ℃;
Second step is about 600~650 ℃ of warm sludges by waste heat boiler slag-drip opening discharge temperature, and is the dust-laden sulfur dioxide gas of 600~700 ℃ by waste heat boiler furnace roof discharge temperature, enters cyclone dust collectors via the high-temperature pipe tangent line and gathers dust;
In the 3rd step, the warm sludge of being discharged by roaster slag-drip opening and waste heat boiler slag-drip opening passes through respectively to be cooled to 80 ℃-60 ℃ through the first high temperature material cooling apparatus in airtight high temperature hopper Pipeline transport to the first material cooler;
In the 4th step, the dust-laden sulfur dioxide gas after cyclone dust collectors gather dust enters electric cleaner via the high-temperature dusty gas pipeline and again gathers dust;
In the 5th step, the lime-ash that is about 300~600 ℃ by cyclone dust collectors ash discharging hole and electric cleaner ash discharging hole discharge temperature passes through respectively to be cooled to 80 ℃-60 ℃ through the second high temperature material cooling apparatus in another airtight high temperature hopper Pipeline transport to the second material cooler; In the 6th step, cooled deslagging and lime-ash are discharged by the first high temperature material cooling apparatus and the second high temperature material cooling apparatus slag notch respectively, and are delivered to the destination via closed conveying device respectively.
Compare with existing process, the present invention maximizes the whole system heat recovery efficiency by the design of each process parameter, has realized being recycled of pyrite-based sulfuric acid production process deslagging heat and slag with simple as far as possible device systems.
For reducing equipment cost, described the first high temperature material cooling apparatus and the second high temperature material cooling apparatus can be water-cooled totally-enclosed coolers, high-temperature ash and cooling water indirect heat exchange in cooler.Be cooled in 80 ℃-60 ℃ in high-temperature ash, cooling water can be elevated to 80 ℃-90 ℃ by 15 ℃-25 ℃ of normal temperature.Cooling water is selected softened water for boiler, can directly enter boiler deoxidation water charging system after heating, saves the boiler feedwater heating cost.
Because troilite warm sludge mobility is better, exchange rate is fast, therefore, described water-cooled totally-enclosed cooler can be spiral or heat-pipe type cooling apparatus, consider based on equipment cost and maintenance cost, but preferred water cold type totally-enclosed spiral cooler, to guarantee the stability of deslagging.Simultaneously, based on troilite warm sludge mobility preferably, water-cooled totally-enclosed spiral cooler is under the prerequisite that satisfies the lime-ash conveying capacity, for reducing equipment attrition, can suitably reduce drum rotation speed, preferred rotating speed is 4-6 rev/mins, and can carry out variable frequency adjustment to corresponding drive motors and control.
For grade ferro-sulphur ore acid making system in general, the iron content of its roaster deslagging is usually less than 50%, and the iron content of the high-temperature ash of being discharged by cyclone separator and electric cleaner is higher than 50%, in order to improve the deslagging rate of recovery, slag dirt separately can be carried, that is: be delivered to the destination by the closed conveying device respectively by lime-ash after the first high temperature material cooling apparatus and the cooling discharge of the second high temperature material cooling apparatus.
Another technical problem that the present invention will solve is to provide a kind of device systems of realizing above-mentioned deslagging heat recovering process method.
Device systems of the present invention comprises roaster, waste heat boiler, cyclone separator and cottrell, the high-temperature dusty gas pipeline is communicated to waste heat boiler top dusty gas import from roaster top successively, be communicated to the cyclone separator tangent line by waste heat boiler top dusty gas outlet again and enter import, and be communicated to the cottrell import by cyclone separator top dusty gas outlet; The second row cinder notch that is arranged on the first row cinder notch of roaster bottom and is arranged on the waste heat boiler bottom is communicated with the first high temperature material cooling apparatus slag inlet; Be separately positioned on the 3rd slag-drip opening and the 4th slag-drip opening of cyclone separator and cottrell bottom, be communicated with the second high temperature material cooling apparatus slag inlet; The first high temperature material cooling apparatus and the second high temperature material cooling apparatus slag notch are communicated with a closed conveying device.
For convenience of the utilization respectively of ash discharge, deslagging, described the first high temperature material cooling apparatus and the second high temperature material cooling apparatus slag notch can be communicated with the first closed conveying device, the second closed conveying device respectively.
The first high temperature material cooling apparatus and the second high temperature material cooling apparatus can all be selected water-cooled totally-enclosed spiral cooler, and the coolant outlet that arranges respectively on the first high temperature material cooling apparatus and the second high temperature material cooling apparatus is communicated with the deoxidation water charging system of waste heat boiler.
In order to guarantee the seal of cooling processing process, slag inlet and the slag notch of described water-cooled totally-enclosed spiral cooler all adopt full-closed structure, and totally-enclosed spiral cooler slag inlet and slag notch adopt flange to be connected with corresponding connecting pipe.
For convenience of carrying out neatly the setting of whole device systems, the first row cinder notch is communicated with the first high temperature material cooling apparatus through airtight high temperature hopper pipeline with the second row cinder notch, simultaneously, the 3rd slag-drip opening is communicated with the second high temperature material cooling apparatus through another airtight high temperature hopper pipeline with the 4th slag-drip opening.The stove of roaster and the high temperature furnace slag of waste heat boiler, the high-temperature dust slag that cyclone separator and cottrell are collected, enter after airtight high temperature hopper pipeline collects respectively carry out in corresponding high temperature material cooling apparatus cooling.
In order further to improve the heat recovery rate of whole system, described airtight high temperature hopper pipeline adopts airtight water leg structure, its cooling water inlet is communicated with the cooling water system of corresponding high temperature material cooling apparatus, and its coolant outlet is communicated with waste heat boiler deoxidation water charging system.So arrange, can effectively reduce the heat loss of high temperature deslagging in course of conveying, reduce simultaneously the heat exchange duty of corresponding high temperature material cooling apparatus.
In order further to guarantee to reduce the cooler maintenance cost by the seal of cooler, described water-cooled totally-enclosed spiral cooler slag inlet place arranges the material receiving box with water leg, and is cooling in advance when high-temperature ash is entered, and reduces slag inlet place's high temperature corrosion.Simultaneously, insert slag feed pipe pelvic outlet plane in slag inlet lower than the minimum point of slag inlet place sealing surface, make high-temperature ash more easily enter leading in the slag pipe of cooler, reduce putty, avoid the heel and toe wear of slag inlet sealing surface, guarantee better the seal of cooler.
Described closed conveying device can be belt conveyor, scraper conveyor, the bucket chain type conveyer that is equiped with sealing shell, to reach on-the-spot free of contamination purpose.
Can according to concrete production capacity and the respective row quantity of slag of pyrite-based sulfuric acid production system, determine the concrete specification of each main body of the present invention and auxiliary genus equipment.
Because whole process material all carries out in airtight equipment, the generation of on-site smoke dust and steam, and the deslagging heat is reclaimed the feedwater heating for waste heat boiler.The present invention has following useful result compared with prior art:
1, the solid waste that produces in the pyrite-based sulfuric acid production process has realized the total closed type processing, does not adopt hydraulic discharged slag or water to drench humidification, but uses high temperature material cooling apparatus that slag and water are carried out indirect heat exchange.The conveying of material adopts the closed conveying equipment to carry, and has effectively solved the recycling of the pollution of deslagging site environment and heat.
2, do not take hydraulic discharged slag or water to drench humidification and saved a large amount of water resources and the Meteorological of sewage disposal device yet.Deslagging need not to dry simultaneously, has kept the grade of original slag, has saved the oven dry expense, and the recycling convenience that provides of the postorder of high-grade slag is provided.
Description of drawings
Fig. 1 is process flow diagram of the present invention;
Fig. 2 is device systems schematic diagram of the present invention;
Fig. 3 is material cooling equipment system schematic diagram of the present invention;
Fig. 4 is high temperature material cooling apparatus structural representation of the present invention;
Fig. 5 is airtight high temperature hopper pipeline structure schematic diagram of the present invention;
Fig. 6 is high temperature material cooling apparatus slag inlet of the present invention place partial structurtes schematic diagram.
In figure: 1-roaster, 2-waste heat boiler, 3-cyclone separator, the 4-cottrell, 5-the first high temperature material cooling apparatus, 6-the first closed conveying device, 7-the second high temperature material cooling apparatus, 8-the second closed conveying device, 11-first row cinder notch, 12-first row cinder notch, 13-the 3rd slag-drip opening, 14-the 4th slag-drip opening, 15-coolant outlet, 16-moisturizing import; The 17-sealing surface, 18-feed pipe, 19-high temperature material lock, 20-water leg, 21-water leg water inlet, 22-water leg delivery port; The airtight high temperature hopper of 30-first pipeline, the airtight high temperature hopper of 31-second pipeline, the airtight high temperature hopper of 301-first pipeline material inlet, the airtight high temperature hopper of 302-first pipeline material outlet, the airtight high temperature hopper of 311-second pipeline material inlet, the airtight high temperature hopper of 312-second pipeline material outlet.
The specific embodiment
As shown in Figure 1, selection process process of the present invention is as follows: the warm sludge of roaster and the warm sludge of waste heat boiler converge through airtight high temperature hopper pipeline and enter a high temperature material cooling apparatus, by indirect heat exchange, the high temperature sludge of 850 ℃-1100 ℃ is cooled to 80 ℃-60 ℃ in high temperature material cooling apparatus, is transported to the destination through a closed conveying device.The high-temperature dusty gas that roaster is discharged is first discharged through waste heat boiler recovery section heat with after gathering dust.The dusty gas that waste heat boiler is discharged gathers dust through cyclone separator and cottrell again, and the dirt slag of collection collects by another airtight high temperature hopper pipeline after another high temperature material cooling apparatus is cooling, is transported to the destination by another closed conveying device.Cooling water is heated through indirect heat exchange in two high temperature material cooling apparatus, and when high-temperature ash was cooled to 80 ℃-60 ℃, cooling water was elevated to 80 ℃-90 ℃ by 15 ℃-25 ℃ of normal temperature, and directly replenishes to waste heat boiler deoxidation water charging system as boiler feedwater.Whole process material all carries out in airtight equipment, the generation of on-site smoke dust and steam, and heat is reclaimed and is used for waste heat boiler generation steam for generating simultaneously.
As shown in Figure 2, described device systems comprises: roaster 1, waste heat boiler 2, cyclone separator 3 and cottrell 4, its high-temperature dusty gas is by pipeline UNICOM, be communicated to successively waste heat boiler 2 tops enters from roaster 1 top, waste heat boiler 2 Extraction parts heats and gather dust after, be communicated to cyclone separator 3 tangential inlets by top dusty gas outlet conduit, and be communicated to cottrell 4 imports by cyclone separator 3 top dusty gas outlets.
As shown in Fig. 2,3, be arranged on the first row cinder notch 11 of roaster 1 bottom and be arranged on the second row cinder notch 12 of waste heat boiler 2 bottoms, be communicated with the slag inlet of the first high temperature material cooling apparatus 5 through the first airtight high temperature hopper pipeline 30; Be separately positioned on the 3rd slag-drip opening 13 and the 4th slag-drip opening 14 of cyclone separator 3 and cottrell 4 bottoms, be communicated with the second high temperature material cooling apparatus 7 slag inlets through the second airtight high temperature hopper pipeline 31; The slag notch of the first high temperature material cooling apparatus 5 and the second high temperature material cooling apparatus 7 is communicated with the first closed conveying device 6, the second closed conveying device 8 respectively.The high temperature furnace slag of roaster and waste heat boiler, the high-temperature dust slag that cyclone separator and cottrell are collected, enter after airtight high temperature hopper pipeline collects respectively carry out in corresponding high temperature material cooling apparatus cooling.Simultaneously, the coolant outlet of the water leg at airtight high temperature hopper pipeline, high temperature material cooling apparatus and high temperature material cooling apparatus slag inlet place all is communicated with moisturizing import 16, and the cooling water inlet of airtight high temperature hopper pipeline is communicated with the coolant outlet 15 of high temperature material cooling apparatus.
As shown in Figure 4, the first high temperature material cooling apparatus 5 and the second high temperature material cooling apparatus 7 are water-cooled totally-enclosed spiral cooler.As shown in Fig. 2,4, the coolant outlet 15 that arranges respectively on the first high temperature material cooling apparatus 5 and the second high temperature material cooling apparatus 7 is communicated with the moisturizing import 16 of waste heat boiler 2.
As Fig. 3 and shown in Figure 5, the first airtight high temperature hopper pipeline 31 of airtight high temperature hopper pipeline 30 and second all adopts airtight water leg structure.
Simultaneously, as Fig. 4, shown in Figure 6, slag inlet and the slag notch of the first high temperature material cooling apparatus 5 and the second high temperature material cooling apparatus 7 all adopt full-closed structure, and the slag feed pipe road junction of its slag notch and corresponding closed conveying device adopts flange to be connected, and the charging aperture place arranges high temperature material lock 19.
As shown in Figure 6, the slag inlet place of the first high temperature material cooling apparatus 5 and the second high temperature material cooling apparatus 7 arranges the material receiving pipe with water leg 20, water leg water inlet 21 is connected with the coolant outlet 15 of high temperature material cooling apparatus, water leg delivery port 22 is communicated with deoxidation moisturizing import 16, and is cooling in advance when high-temperature ash is entered.Simultaneously, as shown in Figure 6, the pelvic outlet plane that inserts the feed pipe 18 in slag inlet reduces slag inlet place's high temperature corrosion lower than the minimum point of slag inlet place sealing surface 17.
Based on troilite warm sludge mobility preferably, the preferred rotating speed of cylinder of the first high temperature material cooling apparatus 5 and the second high temperature material cooling apparatus 7 is 4-6r/min, and can carry out variable frequency adjustment to corresponding drive motors and control, to adapt to the deslagging changes in flow rate.
When the present invention uses in reality, the selection process process is as follows: the slag of roaster 1 and waste heat boiler 2 slags enter the first high temperature material cooling apparatus 5 through the first airtight high temperature hopper pipeline 30, by indirect heat exchange, the high temperature sludge of 850 ℃-1100 ℃ is cooled to 80 ℃-60 ℃ at the first high temperature material cooling apparatus 5, is transported to the destination through the first closed conveying device 6.The high-temperature dusty gas that roaster 1 is discharged is first through waste heat boiler 2 recovery section heats, the dusty gas that waste heat boiler is discharged gathers dust through cyclone separator 3 and cottrell 4, collected high-temperature dust slag collects by the second airtight high temperature hopper pipeline 31 and enters the second high temperature material cooling apparatus 7, after the second high temperature material cooling apparatus 7 is cooling, be transported to the destination by the second closed conveying device 8.Cooling water is heated through indirect heat exchange in two high temperature material cooling apparatus, be cooled in 80 ℃-60 ℃ in high-temperature ash, cooling water is elevated to 80 ℃-90 ℃ by 15 ℃-25 ℃ of normal temperature, and directly replenishes as boiler feedwater the deoxidation water charging system that enters waste heat boiler.
Implement through experiment: the roaster capacity is 140m 3, the waste heat boiler ability is 75-85t/h, and approximately 900 ℃ of the high temperature furnace slags that roaster 1 and waste heat boiler 2 produce are cooled to 65 ℃ through the first high temperature material cooling apparatus 5, and the cold in-water temperature of the first high temperature material cooling apparatus 5 is 18 ℃, and leaving water temperature is 92 ℃.720 ℃ of the high-temperature dust slags that cyclone separator 3 and cottrell 4 collected, through the second high temperature material cooling apparatus cold 7 but to 58 ℃.The cold in-water temperature of the second high temperature material cooling apparatus 7 is 18 ℃, and leaving water temperature is 85 ℃.Be transported to the destination through the first closed conveying device 6 and the second closed conveying device 8 respectively through the first high temperature material cooling apparatus 5 and the second cooled material of high temperature material cooling apparatus 7.The hot water that the first high temperature material cooling apparatus 5 and the second high temperature material cooling apparatus 7 produce directly enters the deoxidation water charging system of waste heat boiler 2 by the soft water pipe network.
The present invention compares with original technique, and its corresponding technique effect is as described in following table:
The calorific value that is equivalent to mark coal 14.95Kg/t according to troilite slag sensible heat amount per ton, the hot residual value of cooling rear slag are that 80KJ/Kg calculates, and per hour to be converted into the mark coal be 1.04T to the cooling rear recovery heat of 85T troilite slag, is equivalent to reduce discharging CO 2Be 2714Kg, SO 2Be 8.8Kg, nitrogen oxide 7.8Kg.

Claims (5)

1. pyrite-based sulfuric acid production deslagging heat recovery equipment system, comprise roaster, waste heat boiler, cyclone separator and cottrell, the high-temperature dusty gas pipeline is communicated to waste heat boiler top dusty gas import from roaster top successively, be communicated to the cyclone separator tangent line by waste heat boiler top dusty gas outlet again and enter import, and be communicated to the cottrell import by cyclone separator top dusty gas outlet; It is characterized in that: the second row cinder notch that is arranged on the first row cinder notch of roaster bottom and is arranged on the waste heat boiler bottom is communicated with the first high temperature material cooling apparatus slag inlet; Be separately positioned on the 3rd slag-drip opening and the 4th slag-drip opening of cyclone separator and cottrell bottom, be communicated with the second high temperature material cooling apparatus slag inlet; The first high temperature material cooling apparatus and the second high temperature material cooling apparatus slag notch are communicated with a closed conveying device; Described the first high temperature material cooling apparatus and the second high temperature material cooling apparatus are water-cooled totally-enclosed spiral cooler, and the coolant outlet that arranges respectively on the first high temperature material cooling apparatus and the second high temperature material cooling apparatus is communicated with waste heat boiler deoxidation water charging system; The slag inlet place of described water-cooled totally-enclosed spiral cooler arranges the material receiving box with water leg; Simultaneously, insert slag feed pipe pelvic outlet plane in slag inlet lower than the minimum point of slag inlet place sealing surface.
2. pyrite-based sulfuric acid production deslagging heat recovery equipment system, comprise roaster, waste heat boiler, cyclone separator and cottrell, the high-temperature dusty gas pipeline is communicated to waste heat boiler top dusty gas import from roaster top successively, be communicated to the cyclone separator tangent line by waste heat boiler top dusty gas outlet again and enter import, and be communicated to the cottrell import by cyclone separator top dusty gas outlet; It is characterized in that: the second row cinder notch that is arranged on the first row cinder notch of roaster bottom and is arranged on the waste heat boiler bottom is communicated with the first high temperature material cooling apparatus slag inlet; Be separately positioned on the 3rd slag-drip opening and the 4th slag-drip opening of cyclone separator and cottrell bottom, be communicated with the second high temperature material cooling apparatus slag inlet; The first high temperature material cooling apparatus and the second high temperature material cooling apparatus slag notch are communicated with the first closed conveying device, the second closed conveying device respectively; Described the first high temperature material cooling apparatus and the second high temperature material cooling apparatus are water-cooled totally-enclosed spiral cooler, and the coolant outlet that arranges respectively on the first high temperature material cooling apparatus and the second high temperature material cooling apparatus is communicated with waste heat boiler deoxidation water charging system; The slag inlet place of described water-cooled totally-enclosed spiral cooler arranges the material receiving box with water leg; Simultaneously, insert slag feed pipe pelvic outlet plane in slag inlet lower than the minimum point of slag inlet place sealing surface.
3. pyrite-based sulfuric acid production deslagging heat recovery equipment according to claim 1 and 2 system, it is characterized in that: the first row cinder notch is communicated with the first high temperature material cooling apparatus through airtight high temperature hopper pipeline with the second row cinder notch, simultaneously, the 3rd slag-drip opening is communicated with the second high temperature material cooling apparatus through another airtight high temperature hopper pipeline with the 4th slag-drip opening.
4. pyrite-based sulfuric acid production deslagging heat recovery equipment according to claim 3 system, it is characterized in that: described airtight high temperature hopper pipeline is airtight water leg structure, its cooling water inlet is communicated with the cooling water system of corresponding high temperature material cooling apparatus, and its coolant outlet is communicated with waste heat boiler deoxidation water charging system.
5. pyrite-based sulfuric acid production deslagging heat recovery equipment according to claim 1 and 2 system, it is characterized in that: described closed conveying device is belt conveyor, scraper conveyor or the bucket chain type conveyer that is equiped with sealing shell.
CN2012101314558A 2012-05-02 2012-05-02 Residue discharge and heat recovery method of pyrite acid production and equipment system Active CN102620574B (en)

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CN103528347A (en) * 2013-11-05 2014-01-22 宁夏新航能源环境科技有限公司 Energy-saving dryer
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CN201250262Y (en) * 2008-09-04 2009-06-03 山东国大黄金股份有限公司 System for producing iron ore concentrate by utilizing gold extraction waste slag
CN101551110A (en) * 2009-05-07 2009-10-07 中国瑞林工程技术有限公司 Method and device for dry-type slag discharge through air delivery
CN101580231A (en) * 2009-06-22 2009-11-18 瓮福(集团)有限责任公司 Method for transporting dregs in pyrite-based sulphuric acid
CN101963461A (en) * 2010-10-26 2011-02-02 瓮福(集团)有限责任公司 Pyrite cinder heat recovery method
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