CN208139857U - Blast furnace slag flushing waste heat and sintering flue gas waste heat comprehensive utilization system - Google Patents

Blast furnace slag flushing waste heat and sintering flue gas waste heat comprehensive utilization system Download PDF

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Publication number
CN208139857U
CN208139857U CN201820275368.2U CN201820275368U CN208139857U CN 208139857 U CN208139857 U CN 208139857U CN 201820275368 U CN201820275368 U CN 201820275368U CN 208139857 U CN208139857 U CN 208139857U
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China
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heat
heat exchange
exchange station
blast furnace
furnace slag
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Expired - Fee Related
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CN201820275368.2U
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Chinese (zh)
Inventor
王棣
张健
王涛
刘梦亭
张良
付鹏冲
刘菲
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Xi Wang Metal Technology Co Ltd
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Xi Wang Metal Technology Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The utility model belongs to heat recovery technology field, and in particular to blast furnace slag flushing waste heat and sintering flue gas waste heat comprehensive utilization system.The blast furnace slag flushing waste heat and sintering flue gas waste heat comprehensive utilization system of the utility model, by the way that by blast furnace slag quenching water and steam exhaust, four sections of ring cold-hot winds of sintering, the series connection temperature raising of sintering flue gas waste heat, stepped heating, heating is either for industrial application.The utility model utilizes the waste heat in steel production(Including blast furnace slag quenching water and steam exhaust, sintering four sections of ring cold-hot winds, sintering flue gases), realize winter central heating and annual industrial refrigeration, heating agent coolant-temperature gage is not less than 85 DEG C, reduces coal dosage, also mitigate atmosphere pollution, has developed and utilized new energy, improves efficiency of energy utilization, reduces cost, enhance one's market competitiveness, preserve the ecological environment.

Description

Blast furnace slag flushing waste heat and sintering flue gas waste heat comprehensive utilization system
Technical field
The utility model belongs to heat recovery technology field, and in particular to blast furnace slag flushing waste heat and sintering flue gas residual heat integrative Utilize system.
Background technique
Steel production middle-low temperature heat resource accounts for about the 34% of residual heat resources total amount, mainly includes low-temperature water heating, low temperature cigarette Gas, low-temperature steam exhaust etc..Low-quality waste heat is big using difficulty because the energy for including in same units is very low, lies substantially in not The state of recycling.Mainly there are two technological difficulties for low temperature exhaust heat recycling:First is that waste heat recovery apparatus should adapt to heat source characteristic, low temperature Waste heat recycling is different from high-temperature residual heat and recycles, and is not especially mature on the whole;Second is that comprehensively considering lithium bromide refrigerating The service requirement and return water temperature of unit and winter heating are retrodicted internal system water, are taken heat point using reverse design thinking Match, determines the connection type of series connection temperature raising, stepped heating, allow to give full play to the maximum potential of each heat source.
Low-quality waste heat in steel production mainly includes blast furnace slag quenching water, blast furnace slag flushing steam exhaust, sintered ring cold-hot wind, burns Tie flue gas;
Blast furnace slag quenching water and exhaust steam residual heat are from blast furnace high temperature furnace slag, and 1400-1500 DEG C of blast furnace cinder slag stream is by high pressure Water water quenching, slag-water slurry flow into detritus tank, grab slag using clamshell crane, the mistake that the water in slag bath passes through slag bath bottom or side Filtering layer is drained.Blast furnace slag quenching water water temperature is extraordinary residual heat resources at 83 DEG C or so, to reuse washing slag water, also Tower cooler need to be cooled down, the heat being rich in water wastes, and a large amount of water evaporations cause thermal pollution into air.
Blast furnace slag flushing steam exhaust be during Water Quenching Slag, when pulp water splashes high-temperature slag, moment generate high-temperature steam.It is high Warm steam is expelled directly out generally by chimney, not plus is utilized, not only waste of energy, the discharge of steam also have surrounding building Certain corrosion.
The waste heat of sintering flue gas and the cold four sections of hot winds of ring is burnt both from high temperature sinter, the cold four sections of cold airs of ring and high temperature After tying mine progress heat exchange, directly empties, residual heat resources is caused to waste, and generate thermal pollution.
Therefore, it is necessary to design a set of system that above-mentioned UTILIZATION OF VESIDUAL HEAT IN can be got up, recuperation of heat, effective recycling benefit are carried out With the thermal energy in production, to achieve energy-saving and emission reduction purposes.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of blast furnace slag flushing waste heat and sintering flue gas waste heat Utilization system;
The blast furnace slag flushing waste heat and sintering flue gas waste heat comprehensive utilization system of the utility model are by following technical sides Case is come the technical problem more than solving:
Blast furnace slag flushing waste heat and sintering flue gas waste heat comprehensive utilization system, the system include:
First heat exchange station, the second heat exchange station, third heat exchange station, the 4th heat exchange station, the 5th heat exchange station, the 6th heat exchange station;
First heat exchange station is connected with the first heat removal pipeline, the second heat removal pipeline, the first recovery channel;
First heat removal pipeline leads to the second heat exchange station;
Second heat removal pipeline is connected with third heat exchange station;There is on the second heat removal pipeline bypass line respectively with second simultaneously Heat exchange station, the 4th heat exchange station, the 5th heat exchange station, the 6th heat exchange station are connected;And second there are also a bypass ducts on heat removal pipeline Road is connected with heating user;
There is the first recovery channel between first heat exchange station and third heat exchange station;There is bypass line and the on first recovery channel Four heat exchange stations are connected;It is connected there are also a bypass line with central heating user on first recovery channel;
6th heat exchange station is connected by third heat removal pipeline with refrigeration system and/or heating system, third heat removal pipeline Upper to be connected there are also one article of bypass line with the 5th heat exchange station, refrigeration system and/or heating system are connected with industrial production workshop It connects;
It is connected between third heat exchange station and refrigeration system by the second recovery channel.
Refrigeration system is hot water lithium bromide unit.
The heat source of first heat exchange station is the first blast furnace slag quenching water;The heat source of second heat exchange station is the first blast furnace slag flushing steam exhaust, The heat source of third heat exchange station is the second blast furnace slag quenching water, and the heat source of the 4th heat exchange station is the second blast furnace slag flushing steam exhaust;5th heat exchange The heat source stood is sintered ring cold-hot wind, and the heat source of the 6th heat exchange station is sintering flue gas.
First heat removal pipeline, the second heat removal pipeline, third heat removal pipeline, the first recovery channel, the second recovery channel and There is valve in all bypass lines.
A kind of blast furnace slag flushing waste heat and sintering flue gas residual heat integrative utilize method, include the following steps:
(1) the first blast furnace slag flushing steam exhaust from the first blast furnace slag quenching water of the first heat exchange station and the second heat exchange station is passed through Series connection temperature raising, stepped heating are delivered to refrigeration system and/or heating system by the second heat removal pipeline, are then sent to workshop Or user;
(2) it is mentioned from the series connection of the sintering flue gas stepped heating of the sintered ring cold-hot wind of the 5th heat exchange station and the 6th heat exchange station Wen Hou is delivered to heating system and/or refrigeration system by third heat removal pipeline;
(3) be respectively from the first heat exchange station, the second heat exchange station, third heat exchange station, the 4th heat exchange station, the 5th heat exchange station, First blast furnace slag quenching water of the 6th heat exchange station, the first blast furnace slag flushing steam exhaust, the second blast furnace slag quenching water, the second blast furnace slag flushing steam exhaust, Sintered ring cold-hot wind, sintering flue gas are delivered to heating system and/or refrigeration system and/or central heating by the first heat removal pipeline User.
70-90 DEG C of supply water temperature of first blast furnace slag quenching water, the second blast furnace slag quenching water, return water temperature are 50-65 DEG C.
The heating agent coolant-temperature gage of the offer of sintered ring cold-hot wind and fume afterheat is 84-88 DEG C, and return water temperature is 64-68 DEG C.
Blast furnace slag quenching water, flushing cinder steam exhaust, sintering flue gas, ring cold-hot wind heat are recycled, (is adopted according to BrLi chiller It is warm) service requirement and return water temperature, determined using reverse design thinking in conjunction with heat source temperature, heat source position, heat source characteristic Cascade System temperature raising, stepped heating connection type, allow to give full play to the maximum potential of each heat source;
The design of the utility model is to recycle blast furnace slag quenching water, flushing cinder steam exhaust, sintering flue gas, ring cold-hot wind heat, according to The service requirement and return water temperature of BrLi chiller (heating), using reverse design thinking, in conjunction with heat source temperature, heat source position It sets, heat source characteristic, determines the connection type of Cascade System temperature raising, stepped heating, allow to give full play to each heat source most Big potentiality, whole system design science, rationally, efficiently.
Lithium bromide (heating) return water is through heat-exchange system series connection temperature raising, step by step promotion heat medium water quality.Return water first by temperature compared with Low blast furnace slag flushing waste heat carries out primary heating, then carries out secondary temperature raising by sintering flue gas, ring cold-hot wind etc., carries out to return water Stepped heating, after being concatenated temperature raising, obtaining heating agent coolant-temperature gage is 85 DEG C, water 3000m3/h。
The beneficial effects of the utility model are, the utility model utilizes waste heat (including the blast furnace slag flushing in steel production Water and steam exhaust, sintering four sections of ring cold-hot winds, sintering flue gases), realize winter central heating and annual industrial refrigeration, heating agent coolant-temperature gage Not less than 85 DEG C, water is up to 3000m3/ h can recycle thermal energy 70.4MW, recycle heat in year and roll over 71585 tons of standard coal, reduce Coal dosage, also mitigates atmosphere pollution, has developed and utilized new energy, improves efficiency of energy utilization, reduces cost, enhances market Competitiveness is preserved the ecological environment.
Detailed description of the invention
Fig. 1 is the blast furnace slag quenching water temperature profile of the utility model;
Fig. 2 is flushing cinder steam exhaust temperature curve;
Fig. 3 is sintered ring cold-hot wind temperature profile;
Fig. 4 is sintering flue gas temperature profile;
Fig. 5 is the system structure diagram of the utility model;
In figure:1-the first heat exchange station, the second heat exchange station of 2-, 3- third heat exchange station, the 4th heat exchange station of 4-, 5- the 5th exchange heat It stands, the 6th heat exchange station of 6-, 7- heating system and/or refrigeration system, 8- central heating user, the second recovery channel of 9-, 10- third Heat removal pipeline, the first heat removal pipeline of 101-, the second heat removal pipeline of 102-, the first recovery channel of 103-.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and detailed description, so as to this field Technical staff knows more about the utility model, but does not limit the utility model with this.
Embodiment 1
The heat source for the first heat exchange station 1 stated below is corresponding for 1# blast furnace slag quenching water (the first blast furnace slag quenching water);(see attached drawing 5)
The heat source of second heat exchange station 2 is the steam exhaust of 1# blast furnace slag flushing (the first blast furnace slag flushing steam exhaust);
The heat source of third heat exchange station 3 is the second blast furnace slag quenching water of 2# (the second blast furnace slag quenching water);
The heat source of 4th heat exchange station 4 is the steam exhaust of the second blast furnace slag flushing of 2# (the second blast furnace slag flushing steam exhaust);
The heat source of 5th heat exchange station 5 is sintered ring cold-hot wind;
The heat source of 6th heat exchange station 6 is sintering flue gas;
It is blast furnace slag quenching water, blast furnace slag flushing steam exhaust, sintered ring cold-hot wind used by the utility model shown in attached drawing 1-4 With the temperature profile of sintering flue gas, pass through its temperature of in attached drawing 1-4 as can be seen that the utility model waste heat source to be utilized It spends higher;
The heat source of first heat exchange station 1 is the first blast furnace slag quenching water;The heat source of second heat exchange station 2 is that the first blast furnace slag flushing is weary Vapour, the heat source of third heat exchange station 3 are the second blast furnace slag quenching water, and the heat source of the 4th heat exchange station 4 is the second blast furnace slag flushing steam exhaust;5th The heat source of heat exchange station 5 is sintered ring cold-hot wind, and the heat source of the 6th heat exchange station 6 is sintering flue gas.
Blast furnace slag quenching water (waste heat) and sintering flue gas waste heat comprehensive utilization system are solved by following technical solutions Above technical problem:
Blast furnace slag flushing waste heat and sintering flue gas waste heat comprehensive utilization system, the system include:
First heat exchange station 1, the second heat exchange station 2, third heat exchange station 3, the 4th heat exchange station 4, the heat exchange of the 5th heat exchange station the 5, the 6th Stand 6;
First heat exchange station 1 is connected with the first heat removal pipeline 101, the second heat removal pipeline 102, the first recovery channel 103;
First heat removal pipeline 101 leads to the second heat exchange station 2;
Second heat removal pipeline 102 is connected with third heat exchange station 3;There is bypass line point on the second heat removal pipeline 102 simultaneously It is not connected with the second heat exchange station 2, the 4th heat exchange station 4, the 5th heat exchange station 5, the 6th heat exchange station 6;And second on heat removal pipeline 102 It is connected there are also a bypass line with central heating user 8;
There is the first recovery channel 103 between first heat exchange station 1 and third heat exchange station 3;There is branch on first recovery channel 103 Pipeline is connected with the 4th heat exchange station 4;It is connected there are also a bypass line with central heating user 8 on first recovery channel 103 It connects;
6th heat exchange station 6 is connected by third heat removal pipeline 10 with refrigeration system 7, and there are also one on third heat removal pipeline 10 Article bypass line is connected with the 5th heat exchange station 5, and refrigeration system 7 is connected with industrial production workshop;
It is connected between third heat exchange station 3 and refrigeration system 7 by the second recovery channel 9.
Refrigeration system 7 is hot water lithium bromide unit.
The heat source of first heat exchange station 1 is the first blast furnace slag quenching water;The heat source of second heat exchange station 2 is that the first blast furnace slag flushing is weary Vapour, the heat source of third heat exchange station 3 are the second blast furnace slag quenching water, and the heat source of the 4th heat exchange station 4 is the second blast furnace slag flushing steam exhaust;5th The heat source of heat exchange station 5 is sintered ring cold-hot wind, and the heat source of the 6th heat exchange station 6 is sintering flue gas.
First heat removal pipeline 101, the second heat removal pipeline 102, third heat removal pipeline 10, the first recovery channel 103, second times There is valve on closed tube road 9, all bypass lines.
Embodiment 2
A kind of blast furnace slag flushing waste heat and sintering flue gas residual heat integrative utilize method, include the following steps:
(1) the first blast furnace slag flushing steam exhaust from the first blast furnace slag quenching water of the first heat exchange station 1 and the second heat exchange station 2 passes through Series connection temperature raising is crossed, stepped heating is delivered to refrigeration system 7 (being also possible to heating system) by the second heat removal pipeline 102, then send To workshop or user;
(2) it connects from the sintering flue gas stepped heating of the sintered ring cold-hot wind of the 5th heat exchange station 5 and the 6th heat exchange station 6 After temperature raising, refrigeration system 7 is delivered to by third heat removal pipeline;
(3) the first heat exchange station 1, the second heat exchange station 2, third heat exchange station 3, the heat exchange of the 4th heat exchange station the 4, the 5th are respectively from It stands the first blast furnace slag quenching water, the first blast furnace slag flushing steam exhaust, the second blast furnace slag quenching water, the second blast furnace slag flushing of the 5, the 6th heat exchange station 6 Steam exhaust, sintered ring cold-hot wind, sintering flue gas are delivered to central heating system 8 and/or refrigeration system by the first heat removal pipeline 101 7 and/or heating system.
In the utility model, specific application and implementation data are as follows:
The waste heat of the utility model is applied in community's heating of north city, it is specific as follows:
The heating of table 1 winter South community
2 winter refrigeration of table and North heating
3 spring and autumn three quarters of table refrigeration
4 washing slag water Design of Heat Exchange Station parameter of table
5 flushing cinder steam exhaust design parameter of table
6 ring cold-hot wind heat exchange station technical data of table
7 sintering flue gas station technical data of table
The low-quality waste heat money of flue gas etc. before blast furnace slag quenching water, flushing cinder steam exhaust, sintered ring cold four sections of hot winds, sintering desulfurations Source realizes the recycling to low-quality waste heat by advanced reclaimer, gives full play to weight industrial combination industrial character, realizes cold Hot coproduction is freezed for winter central heating and non-heating season, is primary courageously effectively the tasting of low-quality residual heat integrative recycling Examination.The recycling project totality utility model design of the utility model waste heat is countercurrently to change by overall planning according to energy quality Heat, step temperature raising.The exhaust heat of slag flushing water that grade is low, heat is big is recycled first, then carries out series connection temperature raising with the higher flue gas of grade, 85 ° or more of heat medium water is generated to be used for for warm industrial refrigeration.In the utility model, builds together and set 2 washing slag water heat exchange stations, 2 Flushing cinder steam exhaust heat exchange station, 1 seat ring cold-hot wind heat exchange station, 1 sintering flue gas heat exchange station, amount to 6 heat exchange stations, wherein single seat blast furnace Washing slag water heat exchange station heating agent water flow 1212.9m3/ h, recycles heat 14.5MW by 10.2 DEG C of temperature raising, and two blast furnace slag quenching waters return altogether Receive heat 29MW;Single seat flushing cinder steam exhaust heat exchange station heating agent water flow 287.1m3/ h, 20 DEG C of temperature raising, recycle heat 6.7MW, two Heat 13.4MW is recycled in blast furnace slag flushing steam exhaust altogether;Sintered ring cold-hot wind heat exchange station heating agent water flow 1500m3/ h, 5.4 DEG C of temperature raising, Recycle heat 9.5MW;Sintering flue gas heat exchange station heating agent water flow 1500m3/ h, recycles heat 18.5MW by 10.6 DEG C of temperature raising.It is comprehensive On, project builds up the heat medium water 3000m that rear recovered temperature is greater than 85 DEG C3/ h amounts to recycling heat 70.4MW.
Low-quality waste heat is recycled for cities and towns for warm industrial refrigeration, heat cost can be reduced, greatly improves energy benefit With efficiency, coal consumption and pollutant emission are reduced.By carrying out supply-demand mode analysis to residual heat resources and thermic load, using special The advanced technologies such as industry filter, high-performance heat exchanger are tried to explore to carry out non-heating period heat recovery, realize UTILIZATION OF VESIDUAL HEAT IN money Source maximizes.
The popularization and implementation of low-quality heat recovery technology can push low temperature exhaust heat recovery technology to a certain extent Research and development and investment further improve low temperature exhaust heat recovery system, the advanced recovery gear of exploitation, improve process flow, try to explore Low temperature heat mode develops low temperature heat approach.

Claims (4)

1. blast furnace slag flushing waste heat and sintering flue gas waste heat comprehensive utilization system, which is characterized in that the system includes:
First heat exchange station(1), the second heat exchange station(2), third heat exchange station(3), the 4th heat exchange station(4), the 5th heat exchange station(5), Six heat exchange stations(6);
First heat exchange station(1)It is connected with the first heat removal pipeline(101), the second heat removal pipeline(102), the first recovery channel(103);
First heat removal pipeline(101)Lead to the second heat exchange station(2);
Second heat removal pipeline(102)With third heat exchange station(3)It is connected;Second heat removal pipeline simultaneously(102)On have bypass line Respectively with the second heat exchange station(2), the 4th heat exchange station(4), the 5th heat exchange station(5), the 6th heat exchange station(6)It is connected;And second row Heat pipeline(102)It is upper that there are also a bypass line and central heating users(8)It is connected;
First heat exchange station(1)With third heat exchange station(3)Between have the first recovery channel(103);First recovery channel(103)On have Bypass line and the 4th heat exchange station(4)It is connected;First recovery channel(103)It is upper that there are also a bypass lines and central heating to use Family(8)It is connected;
6th heat exchange station(6)Pass through third heat removal pipeline(10)With refrigeration system and/or heating system(7)It is connected, third row Heat pipeline(10)It is upper that there are also one article of bypass line and the 5th heat exchange stations(5)It is connected, refrigeration system and/or heating system(7)With Industrial production workshop is connected;
Third heat exchange station(3)With heating system and/refrigeration system(7)Between pass through the second recovery channel(9)It is connected.
2. a kind of blast furnace slag flushing waste heat as described in claim 1 and sintering flue gas waste heat comprehensive utilization system, which is characterized in that Refrigeration system is hot water lithium bromide unit.
3. a kind of blast furnace slag flushing waste heat as described in claim 1 and sintering flue gas waste heat comprehensive utilization system, which is characterized in that First heat exchange station(1)Heat source be the first blast furnace slag quenching water;Second heat exchange station(2)Heat source be the first blast furnace slag flushing steam exhaust, the Three heat exchange stations(3)Heat source be the second blast furnace slag quenching water, the 4th heat exchange station(4)Heat source be the second blast furnace slag flushing steam exhaust;5th Heat exchange station(5)Heat source be sintered ring cold-hot wind, the 6th heat exchange station(6)Heat source be sintering flue gas.
4. a kind of blast furnace slag flushing waste heat as described in claim 1 and sintering flue gas waste heat comprehensive utilization system, which is characterized in that First heat removal pipeline(101), the second heat removal pipeline(102), third heat removal pipeline(10), the first recovery channel(103), second time Closed tube road(9)And there is valve in all bypass lines.
CN201820275368.2U 2018-02-27 2018-02-27 Blast furnace slag flushing waste heat and sintering flue gas waste heat comprehensive utilization system Expired - Fee Related CN208139857U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108253808A (en) * 2018-02-26 2018-07-06 西王金属科技有限公司 Blast furnace slag flushing waste heat and sintering flue gas waste heat comprehensive utilization system and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108253808A (en) * 2018-02-26 2018-07-06 西王金属科技有限公司 Blast furnace slag flushing waste heat and sintering flue gas waste heat comprehensive utilization system and method

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Granted publication date: 20181123