CN202581246U - System utilizing steel slag waste heat to generate electricity - Google Patents
System utilizing steel slag waste heat to generate electricity Download PDFInfo
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- CN202581246U CN202581246U CN 201220164740 CN201220164740U CN202581246U CN 202581246 U CN202581246 U CN 202581246U CN 201220164740 CN201220164740 CN 201220164740 CN 201220164740 U CN201220164740 U CN 201220164740U CN 202581246 U CN202581246 U CN 202581246U
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- slag
- gas recovery
- slag ladle
- waste heat
- cogeneration
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Abstract
The utility model discloses a system utilizing steel slag waste heat to generate electricity. The system comprises a gas recovery branch pipe, a gas recovery general pipe, a power generation unit and at least one hot-braising slag tank. The hot-braising slag tank is provided with a slag tank cover. The slag tank cover is provided with a spray pipe communicated with the inside of the hot-braising slag tank. Each hot-braising slag tank is connected with the gas recovery general pipe through the gas recovery branch pipe. The gas recovery general pipe is connected with the power generation unit. The system utilizing the steel slag waste heat to generate the electricity has the advantages of being high in waste heat utilization rate, strong in waste heat recovery continuity, continuous and stable in electricity generation, and strong in adaptability, and saving operation cost of a steel mill.
Description
Technical field
The utility model relates to cogeneration technology, relates in particular to a kind of system that utilizes slag cogeneration.
Background technology
Steel industry is the industry that resource-intensive, energy consumption are intensive, discharging is intensive.At present, the energy resource consumption of China's steel industry has accounted for more than 10% of national energy resource consumption.And in the process of Iron and Steel Production; Can supervene a large amount of waste heat energy; Like coke-stove gas, blast furnace gas, coal gas of converter, sintering waste heat steam, steel-making afterheat steam, heater for rolling steel afterheat steam and slag waste heat etc., we are referred to as " secondary energy sources " to these complementary energy.The recycling of steel industry secondary energy sources can further improve the utilization ratio of natural energy source, reduces the waste of resource, reduces the influence degree to environment, thereby promotes the construction of resource-conserving and friendly environment society.
Produce a large amount of liquid steel slags in the steelmaking process, generally be about 15% of crude steel output, liquid steel slag has very high temperature (about 1600 ℃), and its heat content is about 1670MJ/t, belongs to high-quality residual heat resources, has very high recovery value.
At present, both at home and abroad iron and steel enterprise all fails effectively to realize the recycling of slag waste heat, has only steel mill of several family that the slag waste heat is reclaimed.The sensible heat that Baosteel adopts drum process to carry out slag reclaims exploitation.Slag gets in the cylinder through slag ladle, and the vapor mixing gas temperature of generation is 90～170 ℃, can directly be used for living facilities or be heated to 600 ℃ being used for generating, and through test, the coefficient of heat efficency is no more than 40%.Nagoya steel mill of Nippon Steel Manufacturing Corp has applied for that the wind method of quenching handles liquid slag technology patent.This technology has following basic characteristics: the blast furnace liquid residue sensible heat rate of recovery is up to more than 70%; It is dried slag that liquid slag is handled the back; Closed processing does not have environmental pollution.Russia Ural iron and steel research institute has developed the ak quench steel slag treatment process of a cover with energy recovery.In the liquid steel slag toppling process, slag contacts with air and produces radiant heat, is provided with to collect through special use to convert hot water, steam and hot-air recycling into.The pilot plant that the wind method of quenching is handled slag has been built in NKK and Mitsubishi Heavy Industries Ltd's cooperation, liquid steel slag in the bell-type boiler with cold air and boiler in water carry out heat exchange, realize waste heat recovery.SUMITOMO CHEMICAL metal and Kawasaki Steel utilize " mechanical mixing method slag prilling ", and slag is through realizing waste heat recovery with the air heat exchange.
The common trait of above recovery method of steel slag residual heat is: the form with steam or hot water reclaims melting slag waste heat, changes into the energy of other a kind of form again.The problem that these technologies mainly exist is: 1, power conversion often, organic efficiency is low; 2, waste heat recovery process is discontinuous.The quality of the waste heat recovery efficient of method and grain slag all can meet the demands though wind is quenched, and it exists, and the waste heat recovery process is discontinuous, power consumption big, equipment bulky complex problems such as (floor space are big, investment cost is high).The defective of above-mentioned technology is the restriction principal element that domestic and international slag waste heat can't reclaim or the rate of recovery is very low, therefore develops a kind of brand-new slag waste heat recovery and utilizes technology, improves waste heat recovery efficient, just becomes needing to be resolved hurrily of task.
The utility model content
The technical problem that the utility model will solve is the deficiency that overcomes prior art, provides that a kind of utilization rate of waste heat is high, the waste heat recovery continuity is strong, the Sustainable Stability generating, saves steel mill's operation cost, the adaptable system that utilizes slag cogeneration.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of system that utilizes slag cogeneration; Comprise that the body of getting angry reclaims arm, Gas Recovery house steward, electric installation and at least one hot vexed slag ladle; The vexed slag ladle of said heat is covered with the slag ladle lid; Said slag ladle covers and is equiped with the sparge pipe that communicates with the vexed slag ladle of said heat inside, and each hot vexed slag ladle connects the Gas Recovery house steward through the Gas Recovery arm, and said Gas Recovery house steward links to each other with said TRT.
Said TRT comprises deduster, gas storage tank, screw expander and generator, and said screw expander one end is communicated with gas storage tank, and the other end links to each other with said generator, and said Gas Recovery house steward is connected with gas storage tank through deduster.
Be provided with check valve between said deduster and the said gas storage tank.
Said Gas Recovery arm is provided with the arm valve.
Said slag ladle covers and is provided with mixer drive, is provided with paddle in the vexed slag ladle of said heat, and said paddle links to each other with mixer drive through a coupling lever.
Said mixer drive comprises motor and gearbox, and the output of said motor links to each other with the input of said gearbox, and the output of said gearbox links to each other with said coupling lever.
Said mixer drive also comprises the lifting drive that is used to drive the coupling lever up-down.
Said slag ladle covers pad and is provided with thermal insulation board.
Said paddle is sheet paddle or rod-type paddle or vane type paddle.
Compared with prior art, the advantage of the utility model is:
The utility model utilizes the system of slag cogeneration; The steam driven TRT generating that produces when handling slag through the vexed slag ladle of heat; Having solved other slag waste heat reclaiming process often will be through repeatedly transforming; The problem that energy could utilize has reduced the loss in the conversion process of energy, and utilization rate of waste heat improves greatly; Can adopt the operation simultaneously of the vexed slag ladle of a plurality of heat, guarantee to have sufficient steam to continue in slag ladle, to discharge, the continuity of waste heat recovery is effectively guaranteed, what make that TRT can be continual and steady carries out generating work; Finally the form with electric energy reclaims the slag waste heat, and the electric energy of generation can directly be connected to the grid, and has not only reduced energy consumption, has also practiced thrift operation cost for steel mill; The utlity model has the characteristics of serialization, closure, high efficiency, be applicable to that each steel mill carries out heat recovery to liquid steel slag or other non-ferrous metal metallurgy slags that produces.TRT comprises deduster, gas storage tank, screw expander and generator; The waste heat gas that reclaims enters into accumulation certain pressure in the gas storage tank more earlier through the deduster dedusting, drives generator for electricity generation through pressed gas drive screw decompressor again; It is few that energy transforms number of times; Improved the transformation efficiency of slag waste heat, through test, transformation efficiency reaches 60%; Be provided with check valve between deduster and the gas storage tank, after deduster carries out purifying and dedusting to gas, can guarantee the operate as normal that check valve can be stable, check valve can guarantee that then the gas pressure in the gas storage tank tends towards stability.The hot vexed slag ladle of the utility model is through the cooperation of mixer drive, paddle and sparge pipe; In the vexed process of heat, can realize stirring slag while spraying water; Broken skull and clinker guarantee that water and hot steel slag fully react, and impel steel slag cracking, efflorescence complete; Also can keep simultaneously the relatively stable of the interior high-temperature steam pressure of slag ladle, realize that steam pressure is controlled, avoid thermal loss, guarantee hot vexed effect, reduce the hot vexed duration, raise the efficiency.
Description of drawings
Fig. 1 is the system architecture sketch map of the utility model.
Fig. 2 is the structural representation of hot vexed slag ladle in the utility model.
Fig. 3 is the main TV structure sketch map of rod-type paddle in the utility model.
Fig. 4 is the main TV structure sketch map of vane type paddle in the utility model.
Fig. 5 is the plan structure sketch map of vane type paddle in the utility model.
Each label is represented among the figure:
1, hot vexed slag ladle; 2, sparge pipe; 3, Gas Recovery arm; 4, Gas Recovery house steward; 5, deduster; 6, check valve; 7, gas storage tank; 8, screw expander; 9, generator; 10, slag ladle lid; 11, arm valve; 12, paddle; 13, coupling lever; 14, gearbox; 15, motor; 16, lifting drive; 17, thermal insulation board.
The specific embodiment
Fig. 1 and Fig. 2 show a kind of system embodiment of utilizing slag cogeneration of the utility model; This system comprises TRT and at least one hot vexed slag ladle 1; The vexed slag ladle 1 of heat is covered with slag ladle lid 10, is equiped with the sparge pipe 2 that communicates with hot vexed slag ladle 1 inside on the slag ladle lid 10, and each hot vexed slag ladle 1 connects Gas Recovery house steward 4 through Gas Recovery arm 3; Gas Recovery house steward 4 links to each other with TRT; The steam driven TRT generating that produces when handling slag through the vexed slag ladle 1 of heat, having solved other slag waste heat reclaiming process often will be through repeatedly transforming the problem that energy could utilize; Reduced the loss in the conversion process of energy, utilization rate of waste heat improves greatly; Can adopt vexed slag ladle 1 operation simultaneously of a plurality of heat; Assurance has sufficient steam to continue in the vexed slag ladle 1 of a plurality of heat, to discharge, and the continuity of waste heat recovery is effectively guaranteed, what make that TRT can be continual and steady carries out generating work; Finally the form with electric energy reclaims the slag waste heat; The electric energy that produces can directly be connected to the grid, and has not only reduced energy consumption, has also practiced thrift operation cost for steel mill; The utlity model has the characteristics of serialization, closure, high efficiency, be applicable to that each steel mill carries out heat recovery to liquid steel slag or other non-ferrous metal metallurgy slags that produces.
In the present embodiment, TRT comprises deduster 5, gas storage tank 7, screw expander 8 and generator 9, and screw expander 8 one ends are communicated with gas storage tank 7; The other end links to each other with generator 9, and Gas Recovery house steward 4 is connected with gas storage tank 7 through deduster 5, and the waste heat gas of recovery is earlier through deduster 5 dedustings; Enter into accumulation certain pressure in the gas storage tank 7 again; Drive generator 9 generatings through pressed gas drive screw decompressor 8 again, it is few that energy transforms number of times, improved the transformation efficiency of slag waste heat; Through test, transformation efficiency reaches 60%; Be provided with check valve 6 between deduster 5 and the gas storage tank 7, after 5 pairs of gases of deduster carry out purifying and dedusting, can guarantee the operate as normal that check valve 6 can be stable, 6 on check valve can guarantee that the gas pressure in the gas storage tank 7 tends towards stability; Gas Recovery arm 3 is provided with arm valve 11, and arm valve 11 can be controlled the gas discharge situation of each hot vexed slag ladle 1 separately.
In the present embodiment; The vexed slag ladle 1 of heat is established ten (the vexed slag ladle 1 of portion of hot does not illustrate in the drawings) altogether; Ten vexed slag ladle 1 operations simultaneously of heat can produce continuous steam, have guaranteed the continuity of exhaust heat recovery power generation; Each hot vexed slag ladle 1 adopts exotic material to make, and slag ladle lid 10 adopts fire-resistant cast iron to make; On each slag ladle lid 10 ten sparge pipes 2 are housed, sparge pipe 2 is evenly distributed on the slag ladle lid 10 (part sparge pipe 2 does not illustrate in the drawings); Slag ladle lid 10 also is equipped with Gas Recovery arm 3, and arm valve 11 has been installed on the Gas Recovery arm 3; Gas Recovery arm 3 is connected with Gas Recovery house steward 4 usefulness threeways; Gas Recovery arm 3, Gas Recovery house steward 4 and gas storage tank 7 outer surfaces all coat one deck insulation material; The exhaust outlet of gas storage tank 7 leads to the air inlet that connects screw expander 8 through pipe; Screw expander 8 and generator 9 link to each other through connecting rod, in the process that reclaims the slag waste heat, by steam lead-screw decompressor 8, drive generators 9 generatings by screw expander 8.
In the present embodiment; On slag ladle lid 10, be provided with mixer drive; Be provided with paddle 12 in the vexed slag ladle 1 of heat, paddle 12 links to each other with mixer drive through a coupling lever 13, and mixer drive comprises motor 15 and gearbox 14; The output of motor 15 links to each other with the input of gearbox 14, and the output of gearbox 14 links to each other with coupling lever 13.The hot vexed slag ladle 1 of the utility model can be realized stirring slag while spraying water in the vexed process of heat, and broken skull and clinker guarantee that water and hot steel slag fully react, and impels steel slag cracking, efflorescence complete; High-temperature steam pressure is relatively stable in simultaneously also can the vexed slag ladle 1 of maintaining heat, realizes that steam pressure is controlled, avoids thermal loss, guarantees hot vexed effect, reduces the hot vexed duration, raises the efficiency.In the present embodiment, mixer drive also comprises the lifting drive 16 that is used to drive coupling lever 13 up-downs, and lifting drive 16 is used to drive coupling lever 13 and drives paddles 12 up-downs, makes stirring more abundant.Pad is provided with thermal insulation board 17 on the slag ladle lid 10, is used for heat-insulation and heat-preservation, and paddle 12 adopts common sheet paddle, and is provided with three sheet paddles, can adopt rod-type paddle as shown in Figure 3 in addition, or like Fig. 4 and vane type paddle shown in Figure 5.
With the vexed processing procedure of actual steel slag heat is the operation principle that example is explained the utility model: the temperature that produces of will make steel is that 1550 ℃ slag is poured in the hot vexed slag ladle 1, covers slag ladle and covers 10; Open sparge pipe 2,, open the arm valve 11 (do not carry out the hot vexed slag ladle 1 that vexed slag is handled, its arm valve 11 is closed) on the Gas Recovery arm 3 simultaneously constantly to the slag surface sprinkling; The temperature of treating steam in the hot vexed slag ladle 1 reaches 400 ℃, when steam pressure reaches 0.6MPa, and open check valve 6; In opening one-way valve 6, start deduster 5, steam is carried out the dedusting operation, make the content of its dust be reduced to 10mg/m
3Steam after the dedusting gets into gas storage tank 7; Treat that the steam pressure in the gas storage tank 7 maintains 0.4MPa, temperature feeds screw expander 8 with steam in the time of 270 ℃, makes steam drive screw expander 8 runnings; The screw expander 8 of running drives generator 9 and carries out power generation operation.
The above-mentioned just preferred embodiment of the utility model is not that the utility model is done any pro forma restriction.Though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model.Any those of ordinary skill in the art; Under the situation that does not break away from the utility model technical scheme scope; All the technology contents of above-mentioned announcement capable of using is made many possible changes and modification to the utility model technical scheme, or is revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from the utility model technical scheme, all should drop in the scope of the utility model technical scheme protection any simple modification, equivalent variations and modification that above embodiment did according to the utility model technical spirit.
Claims (9)
1. system that utilizes slag cogeneration; It is characterized in that: comprise Gas Recovery arm (3), Gas Recovery house steward (4), TRT and at least one hot vexed slag ladle (1); The vexed slag ladle of said heat (1) is covered with slag ladle lid (10); Be equiped with the sparge pipe (2) that communicates with the vexed slag ladle of said heat (1) inside on the said slag ladle lid (10); Each hot vexed slag ladle (1) connects Gas Recovery house steward (4) through Gas Recovery arm (3), and said Gas Recovery house steward (4) links to each other with said TRT.
2. the system that utilizes slag cogeneration according to claim 1; It is characterized in that: said TRT comprises deduster (5), gas storage tank (7), screw expander (8) and generator (9); Said screw expander (8) one ends are communicated with gas storage tank (7); The other end links to each other with said generator (9), and said Gas Recovery house steward (4) is connected with gas storage tank (7) through deduster (5).
3. the system that utilizes slag cogeneration according to claim 2 is characterized in that: be provided with check valve (6) between said deduster (5) and the said gas storage tank (7).
4. according to each described system that utilizes slag cogeneration in the claim 1 to 3, it is characterized in that: said Gas Recovery arm (3) is provided with arm valve (11).
5. according to each described system that utilizes slag cogeneration in the claim 1 to 3; It is characterized in that: said slag ladle lid (10) is provided with mixer drive; Be provided with paddle (12) in the vexed slag ladle of said heat (1), said paddle (12) links to each other with mixer drive through a coupling lever (13).
6. the system that utilizes slag cogeneration according to claim 5; It is characterized in that: said mixer drive comprises motor (15) and gearbox (14); The output of said motor (15) links to each other with the input of said gearbox (14), and the output of said gearbox (14) links to each other with said coupling lever (13).
7. the system that utilizes slag cogeneration according to claim 6 is characterized in that: said mixer drive also comprises the lifting drive (16) that is used to drive coupling lever (13) up-down.
8. the system that utilizes slag cogeneration according to claim 7 is characterized in that: said slag ladle lid (10) is gone up pad and is provided with thermal insulation board (17).
9. the system that utilizes slag cogeneration according to claim 8 is characterized in that: said paddle (12) is sheet paddle or rod-type paddle or vane type paddle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220164740 CN202581246U (en) | 2012-04-18 | 2012-04-18 | System utilizing steel slag waste heat to generate electricity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220164740 CN202581246U (en) | 2012-04-18 | 2012-04-18 | System utilizing steel slag waste heat to generate electricity |
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| Publication Number | Publication Date |
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| CN202581246U true CN202581246U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220164740 Expired - Lifetime CN202581246U (en) | 2012-04-18 | 2012-04-18 | System utilizing steel slag waste heat to generate electricity |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628586A (en) * | 2012-04-18 | 2012-08-08 | 长沙凯瑞重工机械有限公司 | System for generating power by means of waste heat of steel slag |
| CN104533557A (en) * | 2014-11-19 | 2015-04-22 | 鞍山钢铁集团公司矿渣开发公司 | Method for generating electricity through recovering metallurgical slag afterheat |
| CN104709716A (en) * | 2015-03-11 | 2015-06-17 | 张家港市双龙氧化锌厂 | High-temperature powder conveying and guiding-out device |
-
2012
- 2012-04-18 CN CN 201220164740 patent/CN202581246U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628586A (en) * | 2012-04-18 | 2012-08-08 | 长沙凯瑞重工机械有限公司 | System for generating power by means of waste heat of steel slag |
| CN104533557A (en) * | 2014-11-19 | 2015-04-22 | 鞍山钢铁集团公司矿渣开发公司 | Method for generating electricity through recovering metallurgical slag afterheat |
| CN104709716A (en) * | 2015-03-11 | 2015-06-17 | 张家港市双龙氧化锌厂 | High-temperature powder conveying and guiding-out device |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |