CN102620574A - 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 PDFInfo
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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
Technical field
The present invention relates to the processing and the thermal cycle utilization of solid waste in the pyrite-based sulfuric acid production process, relate in particular to the 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 make full use of waste heat, save energy and reduce the cost in the roasting process, generally waste heat boiler and steam turbine power generation will be set, to realize the coproduction of acid, heat, electricity with troilite at the roasting kiln roasting.In the pyrite-based sulfuric acid production process; Because roaster and waste heat boiler produce a large amount of waste residues, the solid waste that pyrite-based sulfuric acid production produces is that the high-temperature roasting slag is the difficult problem of puzzlement enterprise production management, field management and the environmental protection comprehensive regulation always, and 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 causes production scene airborne dust and water, vapour, the multiple pollution of dirt mostly for the hydraulic discharged slag formula or slag is directly carried out water drench humidification, because of water, vapour, dirt middle acid substance more; Corrosion to field apparatus is very serious, and environment is caused very big pollution.And cause great amount of water resources waste because high temperature sludge directly carries out trickle or hydraulic discharged slag, and polluted source,, drops into costlyly, cause the great amount of heat loss if carry out water treatment.If needing to utilize again to dry processing, oven dry processing input cost is high through the slag behind hydraulic discharged slag or the water pouring humidification.
One Chinese patent application 200910102626.2 discloses the method for transporting dregs in a kind of pyrite-based sulfuric acid production, and roaster high temperature burns slag through after cold slag machine cooling and reclaiming heat, directly gets into belt and is delivered to set stockyard; Useless pot, electric dirt get into belt after burning the immersion chilling roll cooling of slag through separately, humidification, send into set stockyard; This method can realize that the slag ash content leaves, and the heat energy that high temperature burns slag obtains partially recycled utilization, certain environmental benefit is arranged, but it thoroughly solves thin slag cooling and recuperation of heat problem.
One Chinese patent application 200910115313.0 discloses a kind of method and device of dry-type slag discharge through air delivery; Comprise burning cooling, conveying and the storage of slag; It send the cooling of fired slags cooler with fired slags; By scratch board conveyor cooled burning slag is delivered to intermediate bin, with air-flow the burning slag that intermediate bin stores is delivered to the target storehouse again, concentrate outwards transportation at last.This 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 the corresponding apparatus system that higher seal is arranged; Otherwise can cause bigger environmental pollution; Also be prone to stop, influence ordinary production because of the equipment seal failure causes the equipment operation.
Summary of the invention
The object of the present invention is to provide and a kind ofly be used for that the temperature that pyrite-based sulfuric acid production process roaster and waste heat boiler produced is high, the deslagging of fine size; Both the process of dried slag removing and heat recovery was handled environmental pollution and the lower problem of deslagging recuperation of heat utilization rate that is produced with deslagging in the solution pyrite-based sulfuric acid production process.
Pyrite-based sulfuric acid production is that troilite (comprising pyrite concentrate) is sent into roasting in the roaster, generates to burn slag and impure sulfur dioxide gas.Its first deslagging point is the roaster slag-drip opening, and deslagging temperature is about 800 ~ 900 ℃.About 900 ~ 1000 ℃ sulfur dioxide dusty gas of roasting furnace roof discharge temperature gets into waste heat boiler and reclaims heat and also 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 gets into electric cleaner and gathers dust after cyclone dust collectors gather dust, last gas gets into 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, about 300 ~ 600 ℃ of ash discharge slag temperature.
Be the comprehensive recuperation of heat utilization rate of raising whole system, and reduce environmental pollution, the present invention implements through following technical scheme:
The high temperature dust gas that roaster is discharged through residual heat boiler for exchanging heat, the back of gathering dust discharges, and gathers dust through cyclone separator and electric cleaner successively, the high-temperature ash of roaster and waste heat boiler discharge is simultaneously cooled off through cooler; Wherein: the high-temperature ash that roaster and waste heat boiler are discharged is cooled to 80 ℃-60 ℃ through the first high-temperature material cooler, 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 cooler; Cooled lime-ash is delivered to the destination by the closed transport; Its concrete steps comprise:
The first step is by about 800 ~ 900 ℃ warm sludge of roaster slag-drip opening discharge temperature; By about 900 ~ 1000 ℃ dust-laden sulfur dioxide gas of roasting furnace roof discharge temperature, get into waste heat boiler via the high temperature dust gas pipeline and carry out heat recovery and gather dust simultaneously, dust-laden sulfur dioxide gas temperature is cooled to 600 ~ 700 ℃;
Second step was about 600 ~ 650 ℃ of warm sludges by waste heat boiler slag-drip opening discharge temperature, and was 600 ~ 700 ℃ dust-laden sulfur dioxide gas by waste heat boiler furnace roof discharge temperature, got into cyclone dust collectors via the high-temperature pipe tangent line and gathered dust;
In the 3rd step, the warm sludge of being discharged by roaster slag-drip opening and waste heat boiler slag-drip opening is delivered in the first material cooler through an airtight high temperature hopper pipeline respectively, is cooled to 80 ℃-60 ℃ through the first high-temperature material cooler;
In the 4th step, the dust-laden sulfur dioxide gas after cyclone dust collectors gather dust gets into electric cleaner via the high temperature dust gas pipeline and gathers dust once more;
The 5th goes on foot, and the lime-ash that is about 300 ~ 600 ℃ by cyclone dust collectors ash discharging hole and electric cleaner ash discharging hole discharge temperature is delivered in the second material cooler through another airtight high temperature hopper pipeline respectively, is cooled to 80 ℃-60 ℃ through the second high-temperature material cooler;
In the 6th step, cooled deslagging and lime-ash are discharged by the first high-temperature material cooler and the second high-temperature material cooler slag notch respectively, and are delivered to the destination via the closed conveying device respectively.
Compare with existing process, the present invention makes the maximization of whole system heat recovery efficiency through 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, the said first high-temperature material cooler and the second high-temperature material cooler 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 for use, can directly get into boiler deoxidation water charging system after the heating, practices thrift the boiler feedwater heating cost.
Because the troilite warm sludge is better mobile, exchange rate is fast, therefore; Said 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, with continuity and the stability of guaranteeing deslagging.Simultaneously, based on troilite warm sludge good mobility, 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 control to the corresponding driving motor.
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, can slag dirt separately be carried, that is: discharge the back lime-ash by the first high-temperature material cooler and the cooling of the second high-temperature material cooler and be delivered to the destination by the closed transport respectively.
Another technical problem that the present invention will solve provides a kind of device systems of realizing above-mentioned deslagging heat recovering process method.
Device systems according to the invention comprises roaster, waste heat boiler, cyclone separator and cottrell; The high temperature dust gas pipeline is communicated to the dusty gas import of waste heat boiler top successively from roaster top; Be communicated to the cyclone separator tangent line by the outlet of waste heat boiler top dusty gas again and get into import, and be communicated to the cottrell import by the outlet of cyclone separator top dusty gas; Second slag-drip opening that is arranged on first slag-drip opening of roaster bottom and is arranged on the waste heat boiler bottom is communicated with the first high-temperature material cooler 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 cooler slag inlet; The first high-temperature material cooler and the second high-temperature material cooler slag notch are communicated with a closed conveying device.
For making things convenient for the utilization respectively of ash discharge, deslagging, the said first high-temperature material cooler and the second high-temperature material cooler slag notch can be communicated with the first closed conveying device, the second closed conveying device respectively.
The first high-temperature material cooler and the second high-temperature material cooler can all be selected water-cooled totally-enclosed spiral cooler, and the coolant outlet that on the first high-temperature material cooler and the second high-temperature material cooler, is provided with respectively is communicated with the deoxidation water charging system of waste heat boiler.
In order to guarantee the seal of cooling processing process, the slag inlet and the slag notch of said water-cooled totally-enclosed spiral cooler all adopt full-closed structure, and totally-enclosed spiral cooler slag inlet and slag notch adopt flange to connect with the corresponding pipeline that is connected.
For carrying out the setting of entire equipment system easily and flexibly; First slag-drip opening is communicated with the first material cooler through airtight high temperature hopper pipeline with second slag-drip opening; Simultaneously, the 3rd slag-drip opening is communicated with the second material cooler 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 dirt slag that cyclone separator and cottrell are collected gets in the corresponding high-temperature material cooler after airtight high temperature hopper pipeline compiles respectively and cools off.
In order further to improve the heat recovery rate of whole system; Said 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 cooler, and its coolant outlet is communicated with waste heat boiler deoxidation water charging system.So be provided with, can effectively reduce the heat loss of high temperature deslagging in course of conveying, reduce the heat exchange duty of corresponding high-temperature material cooler simultaneously.
In order further to guarantee the seal of cooler, reduce the cooler maintenance cost, said spiral cooler slag inlet place is provided with the material receiving box of band water leg, cools off in advance when high-temperature ash is got into, and reduces slag inlet place's high temperature corrosion.Simultaneously, insert the minimum point that the interior slag feed pipe pelvic outlet plane of slag inlet is lower than slag inlet place sealing surface, make high-temperature ash more be prone to leading in the slag pipe of entering cooler, reduce putty, avoid the heel and toe wear of slag inlet sealing surface, guarantee the seal of cooler better.
Described closed transport can be belt conveyor, scraper conveyor, the bucket chain formula conveyer that is equiped with sealing shell, to reach on-the-spot free of contamination purpose.
Can confirm the concrete specification of each main body of the present invention and auxilliary genus equipment according to the concrete production capacity and the respective row quantity of slag of pyrite-based sulfuric acid production system.
All in airtight equipment, carry out because of whole process material, on-site does not have the generation of flue dust and steam, and the deslagging heat is able to reclaim the feedwater heating that is used for waste heat boiler.The present invention has following useful result compared with prior art:
1, the solid waste that is produced 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, and is to use the high-temperature material cooler that slag and water are carried out indirect heat exchange.The conveying of material adopts the closed conveying equipment to carry, and has solved the recycling of pollution of deslagging site environment and heat effectively.
2, do not take hydraulic discharged slag or water to drench the input expense that humidification has also been practiced thrift great amount of water resources and sewage disposal device.Simultaneously deslagging need not to dry, and has kept the grade of original slag, has practiced thrift the oven dry expense, for the postorder recycle of high-grade slag provides convenience.
Description of drawings
Fig. 1 is a process flow diagram according to the invention;
Fig. 2 is a device systems sketch map according to the invention;
Fig. 3 is the material cooling equipment system sketch map that the present invention adopted;
Fig. 4 is the high-temperature material cooler construction sketch map that the present invention adopted;
Fig. 5 is the airtight high temperature hopper pipeline structure sketch map that the present invention adopted;
Fig. 6 is a high-temperature material cooler slag inlet according to the invention place partial structurtes sketch map.
Among the figure: 1-roaster, 2-waste heat boiler, 3-cyclone separator, 4-cottrell; The 5-first high-temperature material cooler, the 6-first closed transport, the 7-second high-temperature material cooler, the 8-second closed transport; 11-first slag-drip opening, 12-first slag-drip opening, 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 30-first airtight high temperature hopper pipeline; The 31-second airtight high temperature hopper pipeline; The 301-first airtight high temperature hopper pipeline material inlet; The 302-first airtight high temperature hopper pipeline material outlet, the 311-second airtight high temperature hopper pipeline material inlet, the 312-second airtight high temperature hopper pipeline material outlet.
The specific embodiment
As shown in Figure 1; Selection process process of the present invention is following: the warm sludge of roaster and the warm sludge of waste heat boiler converge through airtight high temperature hopper pipeline and get into a high-temperature material cooler; In the high-temperature material cooler, 850 ℃-1100 ℃ high temperature sludge is cooled to 80 ℃-60 ℃, is transported to the destination through a closed transport through indirect heat exchange.The high temperature dust gas that roaster is discharged is discharged through waste heat boiler recovery section heat with after gathering dust earlier.The dusty gas that waste heat boiler is discharged gathers dust through cyclone separator and cottrell again, and the dirt slag of collection compiles after another airtight high temperature hopper pipeline after another high-temperature material cooler cooling, is transported to the destination by another closed transport.Cooling water is heated through indirect heat exchange in two high temperature material coolers, and when high-temperature ash was cooled to 80 ℃-60 ℃, cooling water was elevated to 80 ℃-90 ℃ for 15 ℃-25 ℃ by normal temperature, and directly replenishes to waste heat boiler deoxidation water charging system as boiler feedwater.Whole process material is all carried out in airtight equipment, and on-site does not have the generation of flue dust and steam, and simultaneously heat is able to reclaim and is used for waste heat boiler and produces steam and be used for generating.
As shown in Figure 2; Said device systems comprises: roaster 1, waste heat boiler 2, cyclone separator 3 and cottrell 4; Its high temperature dust gas is by pipeline UNICOM, is communicated to waste heat boiler 2 tops successively from roaster 1 top and gets into, after waste heat boiler 2 extracts the part heats and gathers dust; 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.
Like Fig. 2, shown in 3, be arranged on first slag-drip opening 11 of roaster 1 bottom and be arranged on second slag-drip opening 12 of waste heat boiler 2 bottoms, be communicated with the slag inlet of the first high-temperature material cooler 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 cooler, 7 slag inlets through the second airtight high temperature hopper pipeline 31; The slag notch of the first high-temperature material cooler 5 and the second high-temperature material cooler 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 dirt slag that cyclone separator and cottrell are collected gets in the corresponding high-temperature material cooler after airtight high temperature hopper pipeline compiles respectively and cools off.Simultaneously; The coolant outlet of the water leg at airtight high temperature hopper pipeline, high-temperature material cooler and high-temperature material cooler 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 cooler.
As shown in Figure 4, the first high-temperature material cooler 5 and the second high-temperature material cooler 7 are water-cooled totally-enclosed spiral cooler.Like Fig. 2, shown in 4, the coolant outlet 15 that on the first high-temperature material cooler 5 and the second high-temperature material cooler 7, is provided with respectively is communicated with the moisturizing import 16 of waste heat boiler 2.
Like Fig. 3 and shown in Figure 5, first airtight high temperature hopper the pipeline 30 and second airtight high temperature hopper pipeline 31 all adopts airtight water leg structure.
Simultaneously; Like Fig. 4, shown in Figure 6; The slag inlet and the slag notch of the first high-temperature material cooler 5 and the second high-temperature material cooler 7 all adopt full-closed structure, and its slag notch adopts flange to be connected with the slag feed pipe road junction of corresponding closed conveying device, and the charging aperture place is provided with high temperature material lock 19.
As shown in Figure 6; The slag inlet place of the first high-temperature material cooler 5 and the second high-temperature material cooler 7 is provided with the material receiving pipe of band water leg 20; Water leg water inlet 21 is connected with the coolant outlet 15 of high-temperature material cooler; Water leg delivery port 22 is communicated with deoxidation moisturizing import 16, cools off in advance when high-temperature ash is got into.Simultaneously, as shown in Figure 6, the pelvic outlet plane that inserts the feed pipe 18 in the slag inlet is lower than the minimum point of slag inlet place sealing surface 17, reduces slag inlet place's high temperature corrosion.
Based on troilite warm sludge good mobility, the preferred rotating speed of cylinder of the first high-temperature material cooler 5 and the second high-temperature material cooler 7 is 4-6r/min, and can carry out variable frequency adjustment control to the corresponding driving motor, to adapt to the deslagging changes in flow rate.
When the present invention uses in reality; The selection process process is following: the slag of roaster 1 and waste heat boiler 2 slags get into the first high-temperature material cooler 5 through the first airtight high temperature hopper pipeline 30; Through indirect heat exchange 850 ℃-1100 ℃ high temperature sludge is cooled to 80 ℃-60 ℃ at the first high-temperature material cooler 5, is transported to the destination through the first closed transport 6.The high temperature dust gas that roaster 1 is discharged is earlier 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 dirt slag compiles after the second airtight high temperature hopper pipeline 31 gets into the second high-temperature material cooler 7; After 7 coolings of the second high-temperature material cooler, be transported to the destination by the second closed transport 8.Cooling water is heated through indirect heat exchange in two high temperature material coolers; 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 the deoxidation water charging system that gets into waste heat boiler as boiler feedwater.
Implement through experiment: the roaster capacity is 140m
3, the waste heat boiler ability is 75-85t/h, and about 900 ℃ of the high temperature furnace slag of roaster 1 and waste heat boiler 2 generations is cooled to 65 ℃ through the first high-temperature material cooler 5, and the cold in-water temperature of the first high-temperature material cooler 5 is 18 ℃, and leaving water temperature is 92 ℃.720 ℃ of the high temperature dirt slags of cyclone separator 3 and cottrell 4 collections, the warp second high-temperature material cooler cold 7 is but to 58 ℃.The cold in-water temperature of the second high-temperature material cooler 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 cooler 5 and the second high-temperature material cooler, 7 cooled materials.The hot water that the first high-temperature material cooler 5 and the second high-temperature material cooler 7 are produced directly gets into the deoxidation water charging system of waste heat boiler 2 through the soft water pipe network.
The present invention compares with original technology, and its corresponding techniques effect such as following table are said:
| ? | Energy consumption | Heat recovery | Discharge standard | Dust pollution | To corrosion on Equipment |
| Original technology | Use great lot of water resources, polluted source needs to drop into high water treatment facilities and carries out water treatment. | Do not have | Directly, there is not any retracting device to airborne release.Water pollution also is penetrated in the soil. | Directly discharging | Seriously |
| The present invention | Use boiler water, do not have any pollution, and can recycle | Calculated recyclable nearly 9000 tons of mark coals by annual 8500 hours | Realize reducing discharging, annual by calculating in 8500 hours, be equivalent to reduce discharging CO 2Be 23069 tons, SO 2Be 74.8 tons, 66.3 tons of nitrogen oxide.Water body and environment there is not any pollution | Closed does not have and leaks | Do not have |
Be equivalent to mark the calorific value of coal 14.95Kg/t according to troilite slag sensible heat amount per ton, the hot residual value of cooling back slag is that 80KJ/Kg calculates, and per hour 85T troilite slag cooling back is reclaimed heat to be converted into the mark coal be 1.04T, is equivalent to reduce discharging CO
2Be 2714Kg, SO
2Be 8.8Kg, nitrogen oxide 7.8Kg.
Claims (10)
1. pyrite-based sulfuric acid production deslagging heat recovery method; The high temperature dust gas that roaster is discharged through residual heat boiler for exchanging heat, the back discharge of gathering dust; Gather dust through cyclone separator and electric cleaner successively, the high-temperature ash of roaster and waste heat boiler discharge is simultaneously cooled off through cooler; It is characterized in that: the high-temperature ash that roaster and waste heat boiler are discharged is cooled to 80 ℃-60 ℃ through the first high-temperature material cooler, 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 cooler; Cooled lime-ash is delivered to the destination by the closed transport; The concrete steps of said pyrite-based sulfuric acid production deslagging heat recovery method comprise:
The first step is by about 800 ~ 900 ℃ warm sludge of roaster slag-drip opening discharge temperature; By about 900 ~ 1000 ℃ dust-laden sulfur dioxide gas of roasting furnace roof discharge temperature, get into waste heat boiler via the high temperature dust gas pipeline and carry out heat recovery and gather dust simultaneously, dust-laden sulfur dioxide gas temperature is cooled to 600 ~ 700 ℃;
Second step was about 600 ~ 650 ℃ of warm sludges by waste heat boiler slag-drip opening discharge temperature, and was 600 ~ 700 ℃ dust-laden sulfur dioxide gas by waste heat boiler furnace roof discharge temperature, got into cyclone dust collectors via the high-temperature pipe tangent line and gathered dust;
In the 3rd step, the warm sludge of being discharged by roaster slag-drip opening and waste heat boiler slag-drip opening is delivered in the first material cooler through an airtight high temperature hopper pipeline respectively, is cooled to 80 ℃-60 ℃ through the first high-temperature material cooler;
In the 4th step, the dust-laden sulfur dioxide gas after cyclone dust collectors gather dust gets into electric cleaner via the high temperature dust gas pipeline and gathers dust once more;
The 5th goes on foot, and the lime-ash that is about 300 ~ 600 ℃ by cyclone dust collectors ash discharging hole and electric cleaner ash discharging hole discharge temperature is delivered in the second material cooler through another airtight high temperature hopper pipeline respectively, is cooled to 80 ℃-60 ℃ through the second high-temperature material cooler;
In the 6th step, cooled deslagging and lime-ash are discharged by the first high-temperature material cooler and the second high-temperature material cooler slag notch respectively, and are delivered to the destination via the closed conveying device respectively.
2. pyrite-based sulfuric acid production deslagging heat recovery method according to claim 1 is characterized in that: the said first high-temperature material cooler and the second high-temperature material cooler are water-cooled totally-enclosed cooler, high-temperature ash and cooling water indirect heat exchange in cooler; When high-temperature ash was cooled to 80 ℃-60 ℃, cooling water was elevated to 80 ℃-90 ℃ by 15 ℃-25 ℃, and directly gets into waste heat boiler deoxidation water charging system.
3. pyrite-based sulfuric acid production deslagging heat recovery method according to claim 2; It is characterized in that: said water-cooled totally-enclosed cooler is a water-cooled totally-enclosed spiral cooler; Drum rotation speed is 4-6 rev/mins, and spiral cooler drive motors carries out variable frequency adjustment control.
4. pyrite-based sulfuric acid production deslagging heat recovery equipment system; Comprise roaster, waste heat boiler, cyclone separator and cottrell; The high temperature dust gas pipeline is communicated to the dusty gas import of waste heat boiler top successively from roaster top; Be communicated to the cyclone separator tangent line by the outlet of waste heat boiler top dusty gas again and get into import, and be communicated to the cottrell import by the outlet of cyclone separator top dusty gas; It is characterized in that: second slag-drip opening that is arranged on first slag-drip opening of roaster bottom and is arranged on the waste heat boiler bottom is communicated with the first high-temperature material cooler 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 cooler slag inlet; The first high-temperature material cooler and the second high-temperature material cooler slag notch are communicated with a closed conveying device.
5. pyrite-based sulfuric acid production deslagging heat recovery equipment system; Comprise roaster, waste heat boiler, cyclone separator and cottrell; The high temperature dust gas pipeline is communicated to the dusty gas import of waste heat boiler top successively from roaster top; Be communicated to the cyclone separator tangent line by the outlet of waste heat boiler top dusty gas again and get into import, and be communicated to the cottrell import by the outlet of cyclone separator top dusty gas; It is characterized in that: second slag-drip opening that is arranged on first slag-drip opening of roaster bottom and is arranged on the waste heat boiler bottom is communicated with the first high-temperature material cooler 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 cooler slag inlet; The first high-temperature material cooler and the second high-temperature material cooler slag notch are communicated with the first closed conveying device, the second closed conveying device respectively.
6. according to claim 4 or 5 said pyrite-based sulfuric acid production deslagging heat recovery equipment systems; It is characterized in that: the first high-temperature material cooler and the second high-temperature material cooler are water-cooled totally-enclosed spiral cooler, and the coolant outlet that on the first high-temperature material cooler and the second high-temperature material cooler, is provided with respectively is communicated with waste heat boiler deoxidation water charging system.
7. according to the said pyrite-based sulfuric acid production deslagging of claim 6 heat recovery equipment system; It is characterized in that: first slag-drip opening is communicated with the first material cooler through airtight high temperature hopper pipeline with second slag-drip opening; Simultaneously, the 3rd slag-drip opening is communicated with the second material cooler through another airtight high temperature hopper pipeline with the 4th slag-drip opening.
8. according to the said pyrite-based sulfuric acid production deslagging of claim 7 heat recovery equipment system; It is characterized in that: said 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 cooler, and its coolant outlet is communicated with waste heat boiler deoxidation water charging system.
9. according to the said pyrite-based sulfuric acid production deslagging of claim 6 heat recovery equipment system, it is characterized in that: the slag inlet place of the full spiral cooler of said water-cooled is provided with the material receiving box of band water leg; Simultaneously, insert the minimum point that the interior slag feed pipe pelvic outlet plane of slag inlet is lower than slag inlet place sealing surface.
10. according to claim 4 or 5 said pyrite-based sulfuric acid production deslagging heat recovery equipment systems, it is characterized in that: described closed transport is belt conveyor, scraper conveyor or the bucket chain formula conveyer that is equiped with sealing shell.
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| CN112283700A (en) * | 2020-09-17 | 2021-01-29 | 温岭绿能新能源有限公司 | Method for conveying ash in circulating fluidized bed boiler |
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| CN112283700A (en) * | 2020-09-17 | 2021-01-29 | 温岭绿能新能源有限公司 | Method for conveying ash in circulating fluidized bed boiler |
| CN115491460A (en) * | 2022-10-17 | 2022-12-20 | 江苏中碳节能技术有限公司 | Converter flue gas treatment system and treatment method |
| CN115491460B (en) * | 2022-10-17 | 2024-06-07 | 江苏华和能科技术有限公司 | Converter flue gas treatment system and treatment method |
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Effective date of registration: 20170602 Address after: 214532, Jiangsu, Taizhou, Dongxing Town, Jingjiang Hui Feng head dam East Patentee after: Jiangsu Jinglong Alloy Steel Machinery Manufacturing Co., Ltd. Address before: 214500, Huimin road 28, Dongxing Town, Taizhou, Jiangsu, Jingjiang Patentee before: Chen Liang |