CN101838713B

CN101838713B - Method for processing blast furnace liquid slag and recycling energy and application thereof

Info

Publication number: CN101838713B
Application number: CN200910019727A
Authority: CN
Inventors: 钱纲; 姚朝胜; 王子金; 魏新民; 谷卓奇; 于国华; 钱舵
Original assignee: LAIWU TIANMING METALLURGICAL EQUIPMENT CO Ltd
Current assignee: LAIWU TIANMING METALLURGICAL EQUIPMENT CO Ltd
Priority date: 2009-03-19
Filing date: 2009-03-19
Publication date: 2012-09-05
Anticipated expiration: 2029-03-19
Also published as: CN101838713A

Abstract

The invention discloses a method for processing blast furnace liquid slag and recycling energy and application thereof. The method comprises the steps of setting a pipe network, setting a control device and the like, and is characterized in that a confined space is set; the blast furnace liquid slag is led into the confined space; in the confined space, the blast furnace liquid slag entered in the confined space is granulated and then is solidified by using flowing water; the slag discharging temperature of the solidified solid slag is not higher than the boiling point of the water in the confined space; and the generated solid slag is discharged from the confined space; the generated flowing water is collected from the confined space and put to use. The invention is mainly used for solving the problems of high water consumption of a blast furnace slag processing system, unavailable recycling and/or low recycling rate of heat contained in the blast furnace liquid slag of the traditional slag processing system, recycled energy quality required to be improved and the like. Besides the application to the technical fields of blast furnace liquid slag processing and energy recycling, the invention can be also applied to the technical field of sea water desalination and the like.

Description

The processing of blast furnace liquid residue and energy reclaiming method and uses thereof

Technical field

The present invention relates to processing and energy reclaiming method of a kind of blast furnace liquid residue and uses thereof.

Background technology

When producing molten iron, blast furnace is a large amount of liquid slag of output also.Blast furnace liquid residue is containing very high heat energy.Comprise Heat of fusion and physics sensible heat, the heat that blast furnace liquid residue per ton contains is near the contained heat of 100kg standard coal equivalent.

At present, hydraulic discharged slag is the preferred manner of slag treatment before the State of Blast Furnace, and hydraulic discharged slag technology has 4 kinds of modes usually: the settling tank precipitator method, Lhasa method, mattress fragrant plant method and the makeup of wheel method furnace slag particle are put.The common feature of these methods is, requires the temperature of water coolant to be lower than 70 ℃, otherwise, will produce a large amount of foamy slags, influence the quality of grain slag.

For the heat energy that utilizes blast furnace liquid residue to contain; Utilize the heating of flushing cinder remaining hot water to be called as " a great conservation measures " and (see also " blast furnace ironmaking production technology handbook, Zhou Chuandian chief editor, the publication of metallurgical industry press; In August, 2002 first version, the first impression; The 606th～608 page), even so, this project utilizes scope also only in 53 ℃～55 ℃ to 43 ℃～45 ℃ temperature drop scope to the flushing cinder remaining hot water.

The main weak point of prior art is:

1. existing slag treatment process needs to consume a large amount of water when carrying out the slag processing, and the required water yield is approximately a ton slag ton water.YO is 1,000 ten thousand tons a iron work, annually only is used for water loss that slag handles just about 3,500,000 tons.If not adopting the fine fodder principle, because the increase of its quantity of slag, the water loss that is used for the slag processing also can be higher.

2. existing slag treatment process is being carried out when slag handles, and has ignored the recycling of high-quality that slag is contained (temperature>=1400 ℃) heat energy, but utilize again afterwards in its deterioration (temperature≤70 ℃), and be very irrational.

3. utilize the heating of flushing cinder remaining hot water lower, have only 8 ℃～12 ℃ temperature drop space the effective rate of utilization of heat energy; Except the utilization ratio of waste heat heat energy is hanged down, also will cause the operational throughput of water big, the problem that process power consumption height and original capital are big, running cost increases.

4. existing slag treatment process will produce a large amount of foamy slags during in temperature >=70 of water coolant ℃, influences the quality of grain slag, just makes the reducing greatly by source quality of water coolant, has improved and has utilized difficulty.

5. existing exhaust heat recovering method is to be characteristic with the physics sensible heat that reclaims water coolant, and the top temperature of water coolant is lower again, and therefore, the afterheat utilization cost is high, and recovery value is low.

6. utilize the heating of flushing cinder remaining hot water to have obvious seasonal,, not only will all wastes of high-quality heat energy that blast furnace slag contained (temperature >=1400 ℃) also will be cooled off cooling water again, caused dual waste at non-heating season joint.

7. separating of hydraulic discharged slag and waste heat recovery, the processing of liquid slag and the complicacy of energy-recuperation system have been increased.

8. existing slag treatment process needs huge water treatment system, also exists the second environmental pollution problem.

Summary of the invention

The object of the invention is processing and the energy reclaiming method that will provide a kind of blast furnace liquid residue and uses thereof.

The technical problem that the present invention will solve comprises: 1. will solve the high problem of blast furnace slag treatment system water loss, make the water loss of the ton slag of blast furnace slag processing reduce more than 75%, 85%, 90%, 95% or 98%; 2. to solve existing slag treatment system to the problem that heat can not be recycled and/or recovery utilization rate is extremely low that blast furnace liquid residue contained.In the time of 3. will solving temperature >=70 ℃ of water coolant, produce a large amount of foamy slag problems, and the Applicable temperature of water coolant is brought up to >=70 ℃, >=85 ℃, >=100 ℃, >=120 ℃ and higher; 4. except the physics sensible heat that can utilize water coolant, also to solve with the vapor recovery energy recovery problem of the blast furnace liquid residue that is the master, just will solve the problem of the quality that significantly improves the energy that is reclaimed; 5. to solve and carry out when slag handles, the problem of the recycling of high-quality that slag contained (temperature >=1400 ℃) heat energy; 6. solving existing slag treatment process needs huge water treatment system, also exists the second environmental pollution problem; 7. for the enterprise that borders on the sea, in case of necessity, also can solve problem of sea water desaltination or the like.

Basic design of the present invention is: a kind of processing of blast furnace liquid residue and energy reclaiming method comprise it is characterized in that being provided with etc. of setting, gear of pipe network: enclosed space is set; Blast furnace liquid residue is got in the enclosed space; In enclosed space,, and use fluidised form water that it is solidified with the blast furnace liquid residue granulation that gets in the enclosed space; The boiling point of the water in the deslagging temperature >=enclosed space of the solid slag after solidifying; In enclosed space, discharge the solid slag that produces; In enclosed space, the fluidised form water that collection produces also is used.

Described enclosed space is meant a space with isolated from atmosphere.This enclosed space pressure inside; Can be to have certain negative pressure, for example, have 0.8～1,0.9～1,0.95～1,0.98～1 atmospheric absolute pressure; Also can have certain malleation; For example, have 0 (gauge pressure)～＜pressure of the boundary value that the boundary value of the pressurized vessel of national standard defined and the pressure of vessels not under pressure boundary or the have >=pressurized vessel of national standard defined and the pressure of vessels not under pressure are demarcated, more than the emergent pressure that reaches water.When the boundary value of this enclosed space pressure inside >=pressurized vessel of national standard defined and the pressure of vessels not under pressure boundary, requirements such as the structure design of this enclosed space must be abideed by design and the manufacturing standard of country about pressurized vessel.

Described enclosed space can be when possessing These characteristics, can also comprise the space that the internal capacity by cylinder forms, and the completely solidified of liquid slag, calculate by weight percentage, at least 10% in this space final the completion.Here said completely solidified is meant that liquid slag changes into solid-state by fluidised form fully.In fact; Should make more liquid slag in the space that the internal capacity by cylinder forms, accomplish completely crued process as far as possible; For example; Be at least 20%, 30%, 50%, 70%, 80%, 90% even 99%, with give full play to the cooling that produces owing to mixing effect in drum balanced, have advantages such as function of luming of preventing.

The method that blast furnace liquid residue is got in the enclosed space is more, needs particular problem specifically to treat.For example, when this enclosed space pressure inside is near 0.01MPa (gauge pressure), can utilize the natural fluid column pressure of liquid slag to make it to flow in the described enclosed space; When this enclosed space pressure inside higher but when not being very high; Can utilize the passage of the blast furnace liquid residue of U type tubular type; Come the inside and outside pressure of the described enclosed space of balance, utilize the natural fluid column pressure of liquid slag again, blast furnace liquid residue is got in the enclosed space; Higher relatively or even when very high when this enclosed space pressure inside; Can place in the space of all pressing getting into enclosed space preceding blast furnace liquid residue and container containing thereof with described enclosed space; Utilize the natural fluid column pressure of liquid slag again; Blast furnace liquid residue is got in the enclosed space, or the like.

In enclosed space; With the blast furnace liquid residue granulation that gets in the enclosed space, and make its concrete implementation of solidifying also more, for example; Be employed in the water jetting of enclosed space set inside; Comprise methods such as wheel method, for example, the blast furnace liquid residue granulation that gets in the enclosed space can utilize the granulation wheel to realize; Simultaneously, the blast furnace liquid residue granulation that gets in the enclosed space also can utilize fluid water to realize, just utilizes the energy of the fluid water of shower nozzle ejection to realize the blast furnace liquid residue granulation.Here and said once fluid water, can be liquid water, also can be vapourous water or even vaporous water, can also be the mixture of liquid water and vapourous water, the fluid water that promptly occurs with the steam fog form; Be necessary further clear and definite to be; To get into the blast furnace liquid residue granulation in the enclosed space in the described fluid water of utilizing; And make in its process of solidifying, can make described fluid water is that form with liquid water and steam mixture sprays to liquid slag, also can make in the described fluid water of utilizing and will get into the blast furnace liquid residue granulation in the enclosed space; And make in its process of solidifying, described fluid water is to spray to liquid slag with the form of liquid water and steam simultaneously from separately spout respectively.

Described shower nozzle, combined sprinkler preferably, every group of shower nozzle should comprise abundant nozzle, combines with corresponding injection energy, up to being enough to accomplish the task of realizing the blast furnace liquid residue granulation again; All nozzles on the same shower nozzle can use the liquid water of same type; Also can use dissimilar liquid waters; For example, can make the mixture of portion nozzle ejection liquid water and/or portion nozzle ejection vapourous water and/or portion nozzle ejection liquid water and vapourous water.

Quality for the temperature that improves cooled so-called waste water or its physics sensible heat; And/or in order to make full use of the contained physics sensible heat of backwater that returns, at least temperature >=70 of the described fluid water that is in a liquid state of part before getting into enclosed space ℃, >=80 ℃, >=90 ℃, >=95 ℃, >=97 ℃, >=106 ℃, >=120 ℃, >=200 ℃, >=300 ℃ even higher.

Requirement to the granulation degree of blast furnace liquid residue; Preferably be greatly improved than existing water jetting; For example; Can require through the blast furnace liquid residue of waterpower granulation granularity≤20mm ,≤15mm ,≤10mm ,≤7mm ,≤5mm ,≤3mm ,≤1mm even≤0.5mm or littler; Initial temperature with the fluid water of using is complementary, and makes under the situation that the initial temperature that is used for the refrigerative fluid water increases substantially, through reducing its granularity, improve its speed of cooling or improving the solid slag that its cooling conditions obtains to meet the requirements.When utilizing granulation to take turns the granulation that realizes blast furnace liquid residue, if require to obtain the granulation effect apparently higher than prior art, one of technical scheme of its solution is that this granulation wheel is had with respect to the remarkable high rotating speed of prior art; When utilizing fluid water will get into the blast furnace liquid residue granulation in the enclosed space, should guarantee that fluid water has sufficiently high energy.

Because blast furnace liquid residue granulation and refrigerative process thereof are difficult to accurately control; Therefore, under normal operation, seek out ideal, uniformly cooling performance also is the comparison difficulty; Suggestion is provided with the mixing and further refrigerative process of solid slag in described enclosed space; The mixing of solid slag can adopt mechanism mechanical or the aerodynamic force formula to realize.Owing to adopt the principle of aerodynamic force formula to realize that the mixing energy consumption of slag is higher, the mechanical mixing of suggestion employing mechanism is better.The process of machinery mixing can adopt the rotary type whipping appts that has the stirring shovel to carry out, and can adopt that also the reciprocating type whipping appts that has the stirring shovel carries out etc.

Because when utilizing fluid water will get into the blast furnace liquid residue granulation in the enclosed space, the cooling of fluid water liquid towards slag only is preliminary, exist surperficial primary solidification, the inner situation that still is in liquid state to be difficult to avoid; When utilizing the granulation wheel to realize the granulation of blast furnace liquid residue, the coagulation grade of blast furnace liquid residue is lower.Therefore, can in described enclosed space, utilize equipment water jetting cooler to realize the further cooling of solid slag.This equipment water jetting cooler can be made up of nozzle and/or set of nozzles.

The boiling point of the water in the solid slag temperature >=enclosed space after requirement is solidified is in order to improve the temperature of cooling backwater, promptly to improve the quality of its heat energy on the one hand, on the other hand, is for the ease of realizing dry cinder discharging.Particularly; When adopting the working system of dry process and energy recovery, preferably make the boiling point of the interior water of the deslagging temperature＞enclosed space of the solid slag after described the solidifying, to guarantee the safety of dry cinder discharging; For example; Can require the deslagging temperature of solid slag to be higher than about 10 ℃～20 ℃ of the boiling point of water in the enclosed space, perhaps more wide in range, for example be amplified to 5 ℃～50 ℃, 15 ℃～50 ℃, 5 ℃～100 ℃, 25 ℃～100 ℃ or bigger.

In enclosed space, discharging the problem that will note the process of the solid slag that produces is sealing and pressure balanced problem in the tapping process; Also to carry out the consideration of system to the continuity of tapping process.

In enclosed space, the fluidised form water that collection produces also is used, and emphasis is to utilize its heat energy that contains and pressure ability.The fluidised form water of collecting in the enclosed space has two kinds of forms: liquid high-temperature-hot-water and/or relatively-high temperature, highly compressed steam.Because high temperature, highly compressed steam have better quality,, just more be worth recommending so in enclosed space, collecting the fluidised form water that produces and be used is the situation of steam.

Collecting the problem that will note in steam that produces and the process that is used is to contain higher dirt and have certain alkalescence the steam of in enclosed space, directly discharging.Suggestion adopts intermediate heat that dust-laden steam is isolated, and the water of condensation that dustiness is higher is recycled as water coolant; What be necessary to mention is, under this application conditions, adopts heat pipe heat exchanging can obtain the ideal effect, and the heat pipe of no matter selecting for use is inorganic or organically.Though this has increased interchanger,, with increase the dedusting link with to comparing with link in the alkalescence, be more rational.

For under the higher condition of pressure, blast furnace liquid residue is got in the enclosed space smoothly, can adopt the passage of the blast furnace liquid residue of U type tubular type, come the inside and outside pressure of the described enclosed space of balance.

Under the condition higher and/or very high at pressure, blast furnace liquid residue is got in the enclosed space smoothly, can blast furnace liquid residue and container containing thereof be placed in the space of all pressing with described enclosed space.

It should be noted that and to carry out various selectable combinations or reorganization between above-mentioned each main points, to form more, new technical scheme.

The processing of blast furnace liquid residue of the present invention and the Application Areas of energy reclaiming method; Be not limited to the processing and the energy recovery of blast furnace liquid residue; Also being suitable for other has liquid slag need handle and carry out the field of energy recovery; For example, can be used for the processing and the energy recovery of the liquid slag that liquid slag-discharging boiler, process furnace etc. are produced, also can be used for making steel or other Metal smelting process in processing and the energy recovery etc. of the liquid slag that produces.

Being necessary special one, what carry is that the processing of blast furnace liquid residue of the present invention and energy reclaiming method can also be applied to the technical field of sea water desaltination.When the water coolant in getting into enclosed space was seawater, the steam of discharge was utilized, after the condensation, be fresh water, though it has certain dustiness and alkalescence.As long as simply handle (for example, neutralize and/or precipitate and take off dirt etc.), even do not process, just can find its rational purposes, for example, factory uses or is used as agricultural irrigation water etc. voluntarily.

Major advantage of the present invention is:

1. water saving.When implementing the scheme of dry cinder discharging, to compare with existing water jetting, its water-saving rate can reach more than 95%.With a YO is that 1,000 ten thousand tons iron work is example, and annual water-saving amount is just more than 3,000,000 tons.If this iron work is not to adopt the fine fodder principle, because the increase of its quantity of slag, its water-saving amount also can be higher.

See that from present trend the problem of water can become the key factor of restriction social development sooner or later, therefore, water saving is worth and must not weighs with present price.

2. energy-conservation, can reclaim high-quality heat energy in other words.In theory, can utilize the present invention to reclaim postcritical steam; Even only can reclaim MP steam, also can at first be used for generating, and then consider the problem of utilizing of exhaust steam; Even move back some steps again,,, also has great utility value because it is comprising the latent heat of vaporization of water even if the present invention only can recovered temperature be 100 ℃ a steam; Even retreat on the minimum bottom line, also can reclaim 95 ℃ or above hot water, this also is with respect to the outstanding feature of prior art and marked improvement.

Specifically, as far as an iron work of producing 1000 ten thousand tons of pig iron per year, callable energy is about as much as 350,000 tons of standard coal equivalents.In the same way, its meaning has exceeded the category of general economic account, and the saving that is enough to rise to social resources comes up.

If the present invention can obtain to popularize in an all-round way, calculate with the production capacity that China is present, not only can practice thrift about 2,000 ten thousand tons of standard coal equivalents, and can reduce the about 7,000 ten thousand tons CO of discharging ₂And other a large amount of objectionable impuritiess, for example, about 2,500,000 tons SO ₂Deng.

3. utilize liquid slag is granulated into thinner particulate means, improved its speed of cooling, make and use high-temperature cooling water to become possibility.When promptly solving temperature >=70 ℃ of water coolant, produce a large amount of foamy slag problems, established the basis that obtains high-quality heat energy again.

4. method of the present invention is simple, does not need the consumable accessory of frequent change, and the safety of work is higher.

5. method system compact of the present invention, floor space is little, and the first investment of equipment is little, and return rate is high, has bigger popularization and application space.

6. owing to can use water coolant, can exempt the cooling again of water coolant, both avoid the waste of the physics sensible heat of high-temperature cooling water implication, save again and carried out secondary refrigerative expense, particularly reduce energy consumption with comparatively high temps.

7. owing to can obtain high-quality energy, its utilization receives the constraint in season few, therefore, can obtain having the utilization of greater efficiency throughout the year.

8. can solve the secondary pollution problem that cooling water causes environment basically.

9. when the present invention was used for the technical field of sea water desaltination, ironmaking enterprise is transformed into by the water consumption rich and influential family can have fresh water to export fresh water production enterprise only.This advantage of the present invention possibly just can display in the near future.

Description of drawings

9 pages of drawings attacheds of the present invention, totally 9 width of cloth.Wherein:

Fig. 1 is the synoptic diagram of embodiments of the invention 1.

Fig. 2 is the synoptic diagram of embodiments of the invention 2.

Fig. 3 is the synoptic diagram of embodiments of the invention 3.

Fig. 4 is the synoptic diagram of embodiments of the invention 4.

Fig. 5 is the synoptic diagram of embodiments of the invention 5.

Fig. 6 is the sectional view of the A-A in the synoptic diagram (Fig. 5) of embodiments of the invention 5, in order to show the deployment scenarios of discharge chute 61 and base model that divides slag turnover panel 62 and control sump 63.

Fig. 7 is the synoptic diagram of embodiments of the invention 6.

Fig. 8 is the synoptic diagram of embodiments of the invention 7.

Fig. 9 is the synoptic diagram of embodiments of the invention 8.

Embodiment

Embodiment of the present invention can combine embodiment to describe.

Embodiment 1, and is as shown in Figure 1.

In Fig. 1, the 1st, enclosed space, the 2nd, slag ladle, the 3rd, the slag liquid in the slag ladle, the 4th, middle slag chute; The 5th, in the middle of the slag hydraulic control system stopper of slag chute 4, the 6th, slag liquid gets into the passage of enclosed space 1, the 7th, the shower nozzle of fluid water, the 8th, by the current of the fluid water of shower nozzle 7 ejections of fluid water, 9 are arranged on the interior nozzle of enclosed space 1; The 10th, by the cooling-water flowing of nozzle 9 ejections, the 11st, vapor recovery pipe, the 12nd, switch-valve, the 13rd, a kind of solid materials lift; The 14th, the discharge chute of lift 13, the 15th, extra quality clock-type discharging storehouse, the 16th, unload the housing of feed bin 15, the 17th, unload the last bell of feed bin 15; The 18th, the control guide rod of last bell, the 19th, unload the following bell of feed bin 15, the 20th, the control guide rod of following bell 19, the 21st, unload the discharge chute of feed bin 15; The 22nd, be used for pressure balanced gas pipeline, the 23rd, the admission equilibrium valve, the 24th, diffuse equilibrium valve, the 25th, diffuse passage; The 26th, the housing of enclosed space 1, the 27th, the water leg of housing 26 bottoms, the 28th, the water discharge valve of water leg 27, the 29th, the water shoot of water leg 27.

The working process of present embodiment be necessary that the item that further specifies is following:

Blast furnace liquid residue gets into enclosed space 1 through passage 6 by slag chute 4 in the middle of the slag ladle 2 slow impourings under stopper 5 controls.Utilize the energy of the fluid water of shower nozzle 7 ejections, the liquid slag that gets into is smashed, and when it is smashed, carry out initial cooling.In order to make liquid slag obtain good granulation effect, shower nozzle 7 preferably adopts multi-nozzle or many jet orifice structures, thereby forms a jet face.In case of necessity, can make portion nozzle or spray orifice spray liquid water, portion nozzle or spray orifice uperize; Also can be directly in order to spray steam fog so that when obtaining good granulation effect, the cooling performance that can also obtain.In other words; To get into the blast furnace liquid residue granulation in the enclosed space in the described fluid water of utilizing exactly; And make in its process of solidifying, can make described fluid water is that form with liquid water and steam mixture sprays to liquid slag, also can make in the described fluid water of utilizing and will get into the blast furnace liquid residue granulation in the enclosed space; And make in its process of solidifying, described fluid water is to spray to liquid slag with the form of liquid water and steam simultaneously from separately spout respectively.

Very little particle by in granulation and the preliminary refrigerative liquid slag solidifies this moment; Bigger particle has also formed the solidified shell basically; At this moment, its solidified process will be finally accomplished in the continuation cooling of the water coolant (or water smoke) of the nozzle crowd ejection through being formed by nozzle 9.

A large amount of steam that said process produces can be recycled through switch-valve 12 and vapor recovery pipe 11; The solid slag that produces then is slipped to solid materials lift 13 places (when the gradient of the lower edge of illustrated housing 26 is not enough, can also increase) along the lower edge of the housing 26 of enclosed space 1.

Described solid materials lift 13 only is a kind of functional call, and in fact, it can be a chapelet, also can be the screw lift(elevator) that is used for vertical-lift; After carrying out bigger inclination on its basis in illustrated position, it can also be flight elevator or chain bucket elevator or the like.

The solid slag that is raised gets into extra quality clock-type discharging storehouse 15 through discharge chute 14, is discharged from discharge chute 21 by substep then.Adopting the basic purpose in extra quality clock-type discharging storehouse 15, is for the inside and outside sealing of maintenance system, reduces the outer discharge of steam; As for the principle of work and the working process in extra quality clock-type discharging storehouse 15, belong to the content of common-sense, just do not given unnecessary details at this.

In the present embodiment, the liquid water that offers shower nozzle 7 can be following source and combination thereof: at first, and the water of condensation after liquid water can be utilized from steam, the water coolant that reclaims from water leg 27, the new water that replenishes to system etc.; Secondly, vapourous water can be through the self-produced steam after the pressurization, outer other vapour source steam that supplies etc.

Because the generation of random events and the fluctuation of system are difficult to avoid; For example, the smooth and easy degree change of the variation of water supply, air feed (vapour) pressure, liquid slag trickling etc. will inevitably have influence on liquid slag granulation and refrigerative homogeneity; Therefore, suggestion is set up evenly mixing device in the inside of enclosed space 1.Generally speaking, as long as this device has the function of stirring, can make the uneven slag particle homogenizing of cooling degree, help realizing that cooling is just passable uniformly.Both can adopt the method for gas stirring, the method that also can adopt liquid to stir, still, the method for mechanical agitation is adopted in suggestion.Not only energy consumption is lower for the method for employing mechanical agitation, and the safety of work is also higher.Can consider to adopt the rotary type whipping appts that has the stirring shovel to carry out, also can adopt (not shown)s such as the reciprocating type whipping appts that has the stirring shovel carries out.

Receive the restriction of the slag input mode of present embodiment employing, promptly the reasonable altitudes of the fluid column of liquid slag is limited on the one hand, and the manometric head that can produce is also limited naturally; On the other hand; Also consider the safety factorss such as antispray when system is in abnomal condition, therefore, present embodiment should be operated in the pressure lower region; For example, be operated near the 0.01MPa.

Though present embodiment has adopted solid materials lift 13,, it is not the essential of the present invention or present embodiment; Present embodiment adopts its purpose, is to reduce the difference of altitude of slag ladle 2 and discharge chute 21.If with solid materials lift 13 cancellation, and discharge chute 14 and extra quality clock-type discharging storehouse 15 moved down together, and make discharge chute 14 arrive water legs 27 near; At this moment, can utilize the deadweight of solid slag to carry out discharging fully, just in this case; Because slag ladle 2 is too big, reasonable inadequately with the difference of altitude of discharge chute 21, still; But to the safety that improves system works, reduce aspect such as energy expenditure, very big benefit is arranged.

Divide according to the wet degree of doing of deslagging, present embodiment can adopt three kinds of working systems: the working system of the working system of dry type, the working system of half dry type and wet type.

When present embodiment adopts the working system of dry type and the pressure enclosed space 1 in (gauge pressure) is controlled at 0.01MPa when neighbouring, can deslagging temperature be controlled at about 110 ℃～120 ℃.If the temperature of deslagging has exceeded above-mentioned scope, just strengthen the feed rate of water coolant; Otherwise, then reduce.Because under this condition, therefore the boiling point of water, under normal circumstances, does not have the existence of liquid water only a little more than 100 ℃ in the enclosed space 1, just can realize dry operation, the i.e. working system of described dry type reliablely.At this moment, in water leg 27, can there be ponding.

When present embodiment adopted the working system of half dry type, what need control no longer was deslagging temperature, but the humidity of deslagging, what need control in other words is the water cut of slag.If the humidity of the slag of discharging has exceeded predetermined scope, just reduce the feed rate of water coolant; Otherwise, then increase.In this case, the solid slag of discharge will be moist slightly, but not produce dripping phenomenon.At this moment, the temperature of slag will be consistent with the boiling point of water under this operating mode.Liquid water will exist with the mode of being received by the hole of slag, has also just realized the half dry type operation, i.e. the working system of said half dry type.At this moment, in water leg 27, can there be ponding yet.

When present embodiment adopted the working system of wet type, it was just passable only need to control the flow that gets into the unnecessary water coolant in the water leg 27.Owing to adopted obvious excessive water coolant, therefore, cooling performance is best, and just water loss and the traditional residues processing technique of this moment are approaching.At this moment, slag and the temperature that gets into water coolant excessive in the water leg 27 will with the boiling point basically identical of water under this operating mode.

Though more than three kinds of working systems cut both ways,, the present invention and/or present embodiment preferentially recommend to adopt the working system of dry type.

Be necessary to be noted that, directly take from the steam of enclosed space 1 and can contain certain dirt and water smoke, before it is sent to the final user, preferably carry out dedusting, demist is handled.The present invention or present embodiment suggestion adopt quarantine measures to simplify the work of dedusting, demist.Particularly, adopt intermediate heat that dust-laden steam is isolated exactly, as one of desirable scheme.

In the present embodiment, should take necessary insulation measure, fire-resistant heat-resisting measure or the like,, also not add to give unnecessary details owing to can solve by prior art.

What deserves to be mentioned is; For the enterprise that borders on the sea, if with seawater as water coolant, after the steam of producing is fully utilized; The water of condensation that order produces no longer retrieval system carries out recycle; The present invention has just brought up a desalinator, and just when to the water quality requirement of described desalination water when higher, needs are necessary processing in addition again.

Embodiment 2, and is as shown in Figure 2.

Present embodiment only is on the basis of embodiment 1, to have adopted intermediate heat that dust-laden, the steam that contains water smoke are isolated.

In Fig. 2, the 30th, intermediate heat, the 31st, get into the inlet of intermediate heat 30 from the steam of enclosed space 1; The 32nd, intermediate heat 30 is divided into the central dividing plate of evaporator room 33 and condensing chamber 34; The 35th, be used for the heat pipe of heat exchange, the 36th, diffuse valve, the 37th, hot water pump; The 38th, water purification inlet duct, the 39th, water of condensation water leg.Rest part sees also the relevant explanation of embodiment 1.

In the present embodiment; Steam from enclosed space 1 passes through the condensing chamber 34 that inlet 31 gets into intermediate heats 30, utilizes heat pipe 35 to carry out heat exchange, and the water of condensation that in heat exchanging process, produces is carrying the grit in the steam; Flow into water of condensation water leg 39 together, and take away by pump 37.The hot water of being taken away by pump 37 is through after further handling, and for example, to secondary absorption and/or cooling and/or the purification and/or the neutralization etc. of its heat energy that contains, other uses it for anything else, and for example, sends into other watering equipment of this enterprise, supplies etc. as fresh water is outer; Also can not treated or only handle, make it to return native system, be used as the cooling water of present embodiment etc. through simple.

In evaporator room 33, come the water purification of self-purification inlet duct 38 carrying out in the process of heat exchange with heat pipe 35, with producing clean steam, and recycle through vapor recovery pipe 11.Present embodiment does not repel the scheme of producing high-temperature-hot-water (95 ℃～100 ℃ or slightly high) and being used yet.

In Fig. 2, shown intermediate heat 30 is attached on the housing 26 of enclosed space 1, and this only is one of desirable scheme.It can adopt independent structures fully, also can adopt in the prior art other heat exchange mode, or the like.

Present embodiment is also that with the different of embodiment 1 being used for pressure balanced gas pipeline 22 is to be connected condensing chamber 34 away from inlet 31 places.Its reason is, contains a spot of gas in the steam from enclosed space 1 and is difficult to avoid, and the existence of gas can influence the condensation efficiency of steam; Away from inlet 31 places, the gas in the steam can produce the enrichment effect, and the preferential steam that consumes here can have the effect of getting rid of the gas in the steam concurrently.Iff relies in the tapping process; Take away the gas of sneaking in the steam with the steam that pressure equilibrium consumed; Also deficiency then can solve this problem through diffusing valve 36 discharge unit steam so that the gas content in the steam in the condensing chamber 34 maintains on the reasonable levels.

Other content of present embodiment is identical with embodiment 1, has not just repeated at this.

Embodiment 3, and is as shown in Figure 3.

Present embodiment is the improvement project on the basis of embodiment 1 and embodiment 2.Main improvement is: described enclosed space is comprising the space that the internal capacity by cylinder forms, and the completely solidified of liquid slag, calculate by weight percentage, at least 10% in this space final the completion.

In Fig. 3, the 40th, cylinder, the 41st, the driving gear of cylinder 40, the 42nd, the rolling ring of cylinder 40; As for the support roller of cylinder 40 and device for revolving and driving etc., then not shown among the figure, the 43rd, exhaust end end seat, the 44th, winding-up end end seat; The 45th, be erected at the inner fixed beam of cylinder 40, facilities such as nozzle 46 (being actually a set of nozzles), detection probe are installed on this beam, the 47th, the protective shield of winding-up end can be fixed on the winding-up end end seat 44; The 48th, sealing member, it can be various finished parts with standard construction, for example, O shape circle; Y shape sealing members etc. also can be atypic sealing members, for example, can adopt various packings etc.; The 49th, the backgauge dish of exhaust end, it is installed on the cylinder 40, mainly plays dustproof effect, and the 50th, the recycling output channel of the steam of output; The 51st, the solid slag of being discharged by cylinder 40 slides to extra quality clock-type discharging storehouse 15 passages, and the 52nd, special enhanced protective refractory layer is to adapt to abominable especially working conditions here.In addition, also advise residue cleaning eye (not shown) being set, be convenient to cleaning when unforeseen circumstances occurs, possibly accumulate in the residue here etc. at winding-up end.

The working process of present embodiment is; After liquid slag is by the energy granulation (comprising the preliminary cooling effect of carrying out simultaneously) of the fluid water of shower nozzle 7 ejections; Sprayed into the internal space of cylinder 40; Be beneficial to the water coolant of the mixing of cylinder 40, the function that prevents to lump and nozzle 46 ejections, accomplished its curing and refrigerative process gradually, and through the exhaust end discharge.

Smooth and easy for discharge, cylinder 40 can be provided with certain obliquity, for example, has the gradient of 3 °～10 ° or 5 °～15 ° or 10 °～20 ° etc.Because cylinder 40 do not need the intensive crushing effect, its rotating speed can be confirmed according to 1/8～2/3 of the rotating speed of the ball mill of equal turning diameter.

Present embodiment recommends to adopt the working system of dry type or the working system of half dry type, particularly recommends to adopt the working system of dry type.Because in the present embodiment, good stirring, mixing and cooling conditions have made the working system that adopts wet type lose the value that exists.

When adopting the working system of dry type, as long as measure the medial temperature of the solid slag of being discharged at exhaust end, and make it to be higher than the boiling point of water in the enclosed space about 10 ℃～20 ℃ just passable.Certainly, this TR can also be more wide in range, for example is amplified to 5 ℃～50 ℃, 15 ℃～50 ℃, 5 ℃～100 ℃, 25 ℃～100 ℃ or bigger.When the medial temperature of solid slag is too high, just increase the injection flow rate of water coolant and/or shower nozzle 7; Otherwise, just reduce its injection flow rate.

When adopting the working system of half dry type, as long as measure the medial humidity of the solid slag of being discharged at exhaust end, and it is just passable to make it the humidity range of accord with expectation.Cross when low when the medial humidity of solid slag, just increase the injection flow rate of water coolant and/or shower nozzle 7; Vice versa.

The steam of system's output is seen off by output channel 50.

The NM item of present embodiment comprises the implication of unaccounted label seeing also the relevant explanation of embodiment 1 and embodiment 2.

Embodiment 4, and is as shown in Figure 4.

Present embodiment is improved a kind of scheme on the basis of embodiment 3, to improve the temperature and/or the pressure of the steam of exporting.

As shown in Figure 4, present embodiment has increased tightness system 53, balance steam transmitting pipe 54, the valve 55 of balance steam transmitting pipe 54 and the special enclosed appts 57 that diffuses equilibration tube (comprising switch-valve) 56 and slag inlet of slag ladle 2 on the basis of embodiment 3.The function of this special enclosed appts 57 is from the inside of enclosed space 1 passage 6 to be carried out shutoff, the higher or very high situation with the internal pressure that adapts to enclosed space 1; Certainly, this also only is one of scheme of plurality of optional.Constructing the tightness system 53 of this slag ladle 2, is to realize getting into enclosed space preceding blast furnace liquid residue and container containing thereof to place one of means in the space of all pressing with described enclosed space.All the other, except heatproof, voltage endurance capability aspect should be mated with actual needs, identical with embodiment 3 in principle.

The working process of present embodiment is such:

Earlier begin explanation from cold start-up.At first open the valve 55 that diffuses equilibration tube (comprising switch-valve) 56, balance steam transmitting pipe 54, balance steam transmitting pipe 54, open the special enclosed appts 57 of slag inlet, and make output channel 50 be in the state of diffusing, make shower nozzle 7 and nozzle 46 be in closing condition; Secondly, open the tightness system 53 of slag ladle 2, and slag ladle 2 is put into tightness system 53; And tightness system 53 sealed; Make stopper 5 temporarily with passage 6 sealings again, the slag ladle 2 that slowly fascinates makes slag liquid in middle slag chute 4, accumulate certain degree of depth; For example 50cm (annotate: this degree of depth also can supply other embodiment with reference to using) closes then and diffuses equilibration tube (comprising switch-valve) 56; At last, when mentioning stopper 5, open shower nozzle 7 and nozzle 46, just begun the process of slag processing and output steam.Continue slowly to fascinate slag ladle 2, make slag liquid in middle slag chute 4, keep certain degree of depth (for example 50cm), just guaranteed carrying out continuously of processing of slag liquid and energy recovery.

Because before startup, accumulating air in the enclosed space 1, therefore, need make output channel 50 be in the state of diffusing and keep the regular hour, accumulated in the inner air of enclosed space 1 originally so that get rid of; After achieving the goal, output channel 50 is returned to give down the road user and to its functional status that utilizes the delivery of steam of output.

Through the quantity of slag of control entering system and/or the quantity of steam of output, can realize system's internal pressure and temperature controlling.

When adopting the working system of dry type, as long as measure the medial temperature of the solid slag of being discharged at exhaust end, and make it to be higher than the boiling point of water in the enclosed space about 15 ℃～25 ℃ just passable, certainly, can also revise again according to practical situation.

Ask for an interview the relevant explanation of embodiment 3 about the content of others.

When the liquid slag in the slag ladle 2 is use up, utilize stopper 5 temporarily with passage 6 sealings earlier, and after stopper 5 is temporarily with passage 6 sealings; When the liquid slag in accumulating in passage 6 is flow to end, close shower nozzle 7 and nozzle 46, close the special enclosed appts 57 of cinder notch again; Close the valve 55 of balance steam transmitting pipe 54, open slowly then and diffuse equilibration tube (comprising switch-valve) 56, make tightness system 53 pressure inside gradually with the barometric point balance; Open tightness system 53 at last, and the slack tank of the slag liquid of will having turned is replaced with heavy jar, and again tightness system 53 sealed; Slowly open valve 55 again; And when opening valve 55 slowly, close slowly and diffuse equilibration tube (comprising switch-valve) 56, purpose is to diffuse away in the process of changing slag ladle 2, getting into tightness system 53 inner air.Like this; After valve 55 is opened, is diffused equilibration tube (comprising switch-valve) 56 fully and closes fully; Confirm tightness system 53 pressure inside with enclosed space 1 in pressure recovery after the balance, just can open the special enclosed appts 57 of cinder notch again, and when mentioning stopper 5; Open shower nozzle 7 and nozzle 46, proceed the operation of slag processing and heat recuperation.

Circulation is so constantly gone down, and the processing of blast furnace liquid residue and the operation of energy recovery just can constantly have been carried out.

What be necessary to mention is, in the process of changing slag ladle 2, will inevitably cause slag to handle and the briefly interrupted of energy recovery operation.For fear of in the process of changing slag ladle, cause the bigger fluctuating of system pressure, except can setting up the accumulation of energy link, suggesting system for wearing adopts the scheme of two cover tightness systems 53.For example, can each cover of symmetric arrangement.When wherein a cover changed the jar operation, the another set of works better of carrying out made system that big pressure surge not take place.

In theory, the top temperature of the steam that present embodiment can provide can be enough to carry out overcritical operation near the zero pour of liquid slag.As for whether being necessary to carry out this operation, should be according to actual needs and other factors, for example, economic index, safety indexes etc. are carried out necessary assessment, the decision-making before implementing again.

Embodiment 5, and is as shown in Figure 5.

Present embodiment is a kind of improvement project on the basis of embodiment 1 and embodiment 2.

The main difference of present embodiment and embodiment 1 and embodiment 2 has 2 points:

First is that down structure with enclosed space 1 has become a pond 58,59th, the flow profile in this pond, and 60 is the scum silica frost thumb wheel that increases newly.

Second is that extra quality clock-type discharging storehouse 15 has been transformed into two chamber structures arranged side by side; Supporting with it, newly established control sump 63, control sump 63 also has two chamber structures arranged side by side, and makes a control sump corresponding respectively with an extra quality clock-type discharging storehouse, and supporting use.The purpose of doing like this is under the condition that tapping process can not pause, to make the solid slag that effluxes can obtain the enough control water time.Constitute by rotatable bushing 64 at the bottom of the storehouse of control sump 63, be shaped on a plurality of leaking holes on it.When bushing 64 rotated and stops at the top, the solid slags in the control sump 63 were accumulated in wherein, and moisture wherein then leaks down through small opening, and turns back in the pond 58; After the solid slag of control in the sump 63 accomplished the operation of control water, below making bushing 64 rotations and stopping at, then control controlled water in the sump 63 solid slag then by the extra quality clock-type discharging of impouring storehouse 15, efflux then.

In order under the condition of solid materials lift 13 uninterrupted dutys, to realize the dynamic assignment of solid slag, also the discharge chute among Fig. 1 14 has been transformed into the discharge chute 61 among Fig. 5, Fig. 6.This discharge chute 61 has reducing that solid slag is concentrated to the centre (this as can be seen from Figure 6).Like this, divide the slag turnover panel 62 residing different positionss, just can make solid slag fall into specified that control sump 63 through control.Particular case also can be found out from Fig. 6.

The working process of present embodiment is: shower nozzle 7 directly sprays to liquid slag the metal line 59 in pond 58, and assists cooling by the water coolant of nozzle 9 ejections.The most solid slags that form will sink under water, and slide to solid materials lift 13, seen off then; Can produce unavoidably in the process a spot of, swim in the foamy slag on the water surface, then they are dialled to solid materials lift 13, and at solid materials lift 13 1 lateral enrichments by scum silica frost thumb wheel 60, last, also will be seen off by solid materials lift 13.Another effect of scum silica frost thumb wheel 60 is the flowing of water that promotes in the pond 58, makes the warm sludge that just falls into the pond that a good cooling interface arranged.Under the effect of discharge chute that has reducing 61 and branch slag turnover panel 62, solid slag just falls into specified control sump 63 together with the moisture that carries; At this moment, the solid slag that accumulates in another control sump 63 is in the control water state.After the solid slag in this control sump 63 is accomplished the operation of control water, make bushing 64 rotations in this storehouse and rest on the below, with the extra quality clock-type discharging of the solid slag impouring storehouse 15 in the storehouse, discharge then; After with the extra quality clock-type discharging of the solid slag impouring storehouse 15 in the storehouse, recover bushing 64 again to original position, promptly rotate and stop at and control sump 63 tops, for the collection operation that is about to carry out is got ready.At this moment, rechange the working position of branch slag turnover panel 62, make that control sump 63 of collecting solid slag originally change the control water state over to, make the empty control sump that just inclines get into collection status.Through switching so repeatedly, both kept working continuously of system, controlled out the moisture in the slag again, avoided the waste of water.

About other situation of present embodiment, ask for an interview the relevant explanation of embodiment 1 and embodiment 2.

Embodiment 6, and is as shown in Figure 7.

Present embodiment is at above-mentioned relevant embodiment, mainly is embodiment 4 and embodiment 5, the basis on a kind of improvement that reconfigures formula of carrying out; Particularly, exactly tightness system among the embodiment 4 53 and relevant portion thereof have been transplanted to embodiment 5.Except the angle of inclination that increased backwater channel 65, the shape that has changed housing 26 of independently controlling water, adjusted solid materials lift 13 (certainly; Concrete variation can also be more, bigger) outside; The round line that increases at the cylindrical place of described scum silica frost thumb wheel 60; Be when the spherical end of being shaped as of housing 26 conical, the projection of the columniform installing space that adopts for the top that prevents described scum silica frost thumb wheel 60 and housing 26 interferes and the intersection of conical housing 26.All the other all can particularly from embodiment 4 and embodiment 5, obtain understanding from other embodiment, have not just given unnecessary details at this.

Embodiment 7, and is as shown in Figure 8.

Present embodiment is a kind of improvement of on the basis of embodiment 6, carrying out.It is characterized in that the passage that it adopts the blast furnace liquid residue of U type tubular type comes the inside and outside pressure of the described enclosed space of balance.Its main points have been to cancel the tightness system 53 and the associate member thereof of the slag ladle 2 among the aforementioned relevant embodiment; For example, the valve 55 of balance steam transmitting pipe 54, balance steam transmitting pipe 54 diffuses equilibration tube (comprising switch-valve) 56 etc.; Increased U-shaped pipe 67; And transforming original middle slag chute 4 as new middle slag chute 66, the characteristics of new middle slag chute 66 are that it has sealing function, and are provided with pressure equalizing pipe 68; Also this is set as partly form under water with scum silica frost thumb wheel 60, to strengthen its agitation capability to the water in the pond.

In order to prevent that the Yin Wendu deficiency from causing solidifying of liquid slag to cause the work of U type pipe not normal, suggestion increases the insulation and/or the facility of heating, for example; Add thick insulation layer, set up the pipeline of heating, preset the electrically heated mechanism of similar salt bath furnace etc.; In case of necessity, also can slag-drip opening be set, so that when shutting down maintenance in the bottom of U type pipe; With depositing the slag emptying in the U type pipe, prevent the obstruction of U type pipe etc.All the other can obtain understanding from embodiment 6, have not just given unnecessary details at this.

Present embodiment mainly is applicable under the higher relatively but not too high condition of vapor pressure, for example, when the pressure of steam 0.1MPa～0.2MPa and near the time so that, simplify the operation in safety, easily under the prerequisite.But after system pressure further improved, the height of U type pipe will be very high, reduced its comprehensive advantage on the contrary, thereby become the scheme of not recommending.As for the principle of work of U type pipe, belong to physics general knowledge, also repeated no more.

Embodiment 8, and is as shown in Figure 9.

Present embodiment is a kind of improvement of on the basis of embodiment 4, carrying out.Its main improvements are, it is to have adopted granulation wheel 69 to replace shower nozzle 7, and utilize this granulation wheel 69 to realize getting into the granulation of the blast furnace liquid residue in the enclosed space; Simultaneously, also increased splasher 70, to prevent splashing of blast furnace liquid residue.In addition, also should take the cooling provision (not shown) to granulation wheel 69, water smoke refrigerative mode is adopted in suggestion; When taking cooling provision, should also be noted that the cleaning function that comprises granulation wheel 69, suggestion is handled through the form of the projection velocity of raising water smoke; The mechanism that certainly, also can adopt machinery to scrape slag is limited in the maximum ga(u)ge of the slag that condenses that the cylindrical place of granulation wheel 69 possibly accumulate etc.

It should be noted that in granulation being taken turns 69 refrigerative processes the consumption of water coolant is superfluous often; Therefore; Should take preventive measures, prevent that liquid water from accumulating in enclosed space 1, to prevent because the unexpected vaporization of water causes the part " to blow out " generation of phenomenon.

Prevent that the preventive measures that liquid water accumulates from can have kinds of schemes available in enclosed space 1.For example, can below granulation wheel, water storage tank be set, and steam spraying gun be set it is purged incessantly, make it the ponding that can not form; Also can install seamless (wear-resisting) lining in cylinder 40 inside additional; Make and in enclosed space 1, can not form the secondary seal space; Like this; Behind the protective shield 47 inflow cylinders 40 that the water of surplus is held along winding-up, can only in its space of opening wide relatively, vaporize gradually, be unlikely to the works better of the system that influences.

What need special instruction is: on the one hand, above-mentioned each embodiment is a case of the present invention, and one of their effect is that the present invention is played explanation, and should not be construed as any restriction that the present invention is made; On the other hand, can also carry out new combination at above-mentioned each embodiment and in summary of the invention of the present invention between cited technical parameter and the technical scheme, thereby obtain new embodiment etc.

Claims

1. the processing of a blast furnace liquid residue and energy reclaiming method comprise the setting of pipe network, the setting of gear, it is characterized in that:

1.1 enclosed space is set, and this enclosed space pressure inside, the pressure of the boundary value of the pressurized vessel of >=national standard defined and the boundary of the pressure of vessels not under pressure,

1.2 the blast furnace liquid residue and the container containing thereof that will get into before the described enclosed space place the passage that perhaps adopts the blast furnace liquid residue of U type tubular type in the space of all pressing with described enclosed space; Come the inside and outside pressure of the described enclosed space of balance; Blast furnace liquid residue is got in the described enclosed space

1.3 in described enclosed space,, and use fluidised form water that it is solidified with the blast furnace liquid residue granulation that gets in the described enclosed space,

1.4 the boiling point of the water in the deslagging temperature of the solid slag after solidifying >=described enclosed space,

1.5 in described enclosed space, discharge the solid slag that produces,

1.6 in described enclosed space, the fluidised form water that collection produces also is used.

2. the processing of blast furnace liquid residue as claimed in claim 1 and energy reclaiming method is characterized in that:

2.1 described enclosed space is comprising the space that the internal capacity by cylinder forms, and the completely solidified of liquid slag, calculate by weight percentage, at least 10% in this space final the completion.

3. the purposes of the processing of a blast furnace liquid residue according to claim 1 or claim 2 and energy reclaiming method is characterized in that:

3.1 it is applied to the technical field of sea water desaltination.