CN205642048U

CN205642048U - Smoke waste heat utilization system

Info

Publication number: CN205642048U
Application number: CN201620501574.1U
Authority: CN
Inventors: 马永宁; 魏新华; 李兴波
Original assignee: SHAANXI SHENGHUA YEHUA CO Ltd
Current assignee: SHAANXI SHENGHUA YEHUA CO Ltd
Priority date: 2016-05-27
Filing date: 2016-05-27
Publication date: 2016-10-12
Anticipated expiration: 2026-05-27

Abstract

The utility model provides a smoke waste heat utilization system, the discharge gate department of the hot stove in ore deposit is provided with the cold machine of combing, and every petticoat pipe and a heat exchanger are through first pipe connection, be provided with first evaporimeter and second evaporimeter in the heat exchanger, all first evaporimeters pass through second pipeline polyphone, the one end of second pipeline and exhaust -heat boiler's first exit linkage, the other end and exhaust -heat boiler's first entry linkage, exhaust -heat boiler's second export is connected with the steam turbine through the third pipeline, and the steam turbine is connected with the generator, first pipeline is made by PU polyurethane or polyurethanes expanded material by inlayer, heat preservation and outer layer composition, heat preservation. The utility model discloses the rational utilization heat of a large amount of flue gases of producing in the silicon -calcium smelting production process, improved the waste heat recovery utilization efficiency of smelting technology greatly, increase the generated energy, because first pipeline is hot oil line, the in -process that the heat exchanger was carried is being gone to the high temperature flue gas of discharge gate, and the heat loss has significantly reduced.

Description

Smoke waste heat utilization system

Technical field

This utility model belongs to cogeneration technology field, is specifically related to a kind of smoke waste heat utilization system.

Background technology

The ternary alloy three-partalloy that calcium-silicon is made up of elemental silicon, calcium and ferrum, mainly has block and two kinds of things of powdery Reason state.Its amount containing Ca is general 24～31%, and si content is between 55～65%.Calcium-silicon is one Kind ideal double deoxidizer, desulfurizing agent.It is applied to the steel grade such as mild steel, rustless steel and Ni-based conjunction In the middle of the production of the specific alloys such as gold, titanium-base alloy, and it is suitable as the heating agent of pneumatic steelmaking, can also be used with Make the inovulant of cast iron and spheroidal graphite cast-iron produce in additive.Current calcium-silicon can substitute for aluminum to be carried out Final deoxidizing, is widely used in the production of high-quality steel.Additionally, calcium-silicon powder obtains in jet metaurgy It is widely applied.Calcium-silicon is not only big to the affinity of oxygen and sulfur, but also can reduce oxygen and sulfur exists Dissolubility in molten iron, simultaneous oxidation thing and sulfide etc. separate out rapidly from molten steel, thus do not stay residual in steel Slag, so many countries all produce the calcium-silicon powder of particulate in recent years.

Ca-Si smelting, predominantly high-temperature flue gas, separate unit Ca-Si smelting kiln gas flow: 186000Nm³/ h, temperature Degree: 400 DEG C, is arranged at present and enters sack cleaner dedusting after mainly being lowered the temperature by U-shaped cooler, enter cigarette Chimney.High-temperature flue gas carries energy and is not only wasted, and the most additionally increases exerting oneself of induced-draught fan, increases and run into This.

Summary of the invention

The purpose of this utility model is to provide a kind of smoke waste heat utilization system, to overcome silico-calcium in prior art The high-temperature flue gas produced in smelt production is not utilized, and the energy that high-temperature flue gas carries all is wasted Problem.

The technical solution adopted in the utility model is:

Smoke waste heat utilization system, including mineral hot furnace, waste heat boiler and multiple heat exchanger；The discharging of mineral hot furnace It is provided with grate-cooler at Kou, in grate-cooler, is provided with multiple air compartment, each air compartment is provided with a petticoat pipe； The number of petticoat pipe is corresponding with the number of heat exchanger, and each petticoat pipe and a heat exchanger are connected by the first pipeline； First vaporizer and second vaporizer it is provided with in each heat exchanger；All of first vaporizer leads to Crossing second pipe series winding, the first of one end of second pipe and waste heat boiler exports and is connected, second pipe another One end is connected with the first entrance of waste heat boiler；Second outlet of waste heat boiler is by the 3rd pipeline and steam turbine Connecting, steam turbine is connected with electromotor；First pipeline is made up of internal layer, heat-insulation layer and outer layer, and heat-insulation layer sets Putting between internal layer and outer layer, heat-insulation layer is made up of PU polyurethane or polyurethanes expanded material.

Wherein, the second vaporizer is contacted by the 4th pipeline；One end of 4th pipeline is connected with steam turbine, the The other end of four pipelines is connected with the second entrance of waste heat boiler.

Wherein, the 4th pipeline between steam turbine and the second vaporizer is disposed with condenser, condenses water Pump, oxygen-eliminating device and feed pump.

It addition, electromotor is connected with mineral hot furnace by electrical network.

The beneficial effects of the utility model are, a large amount of cigarettes 1. produced in Appropriate application Ca-Si smelting production process The heat of gas, substantially increases the heat recovery efficiency of smelting process, increases generated energy；On the one hand, Reduce and pollute, obtain good social effect；On the other hand, utilize waste heat to generate electricity, reduce production cost, Obtain good economic benefits；2. being utilidor due to the first pipeline, the high-temperature flue gas of discharging opening is toward heat exchange During device conveying, greatly reduce the loss of heat so that flue gas keeps entering in high temperature input heat exchanger Row heat radiation, thus the water in waste heat boiler is heated, save heat energy.

Accompanying drawing explanation

Fig. 1 is the structural representation of this utility model smoke waste heat utilization system；

Fig. 2 is the profile of the first pipeline.

In figure: 1. mineral hot furnace, 2. waste heat boiler, 3. heat exchanger, 4. discharging opening, 5. grate-cooler, 6. petticoat pipe, 7. First vaporizer, 8. the second vaporizer, 9. steam turbine, 10. electromotor, 11. coagulate cooler, 12. condensate pumps, 13. oxygen-eliminating devices, 14. feed pumps, 15. first pipelines, 15-1. internal layer, 15-2. heat-insulation layer, 15-3. outer layer, 16- Second pipe, 17-the 3rd pipeline, 18-the 4th pipeline.

Detailed description of the invention

Below in conjunction with the accompanying drawings this utility model is described in detail:

As it is shown in figure 1, this utility model provides a kind of smoke waste heat utilization system, including mineral hot furnace 1, waste heat Boiler 2 and multiple heat exchanger 3；It is provided with grate-cooler 5 at the discharging opening 4 of mineral hot furnace 1, sets in grate-cooler 5 It is equipped with multiple air compartment, each air compartment is provided with a petticoat pipe 6；The number of petticoat pipe 6 and the number of heat exchanger 3 Correspondence, each petticoat pipe 6 is connected by the first pipeline 15 with a heat exchanger 3；Arrange in each heat exchanger 3 There are first vaporizer 7 and second vaporizer 8.

This utility model smoke waste heat utilization system is divided into two circulations:

First circulation, all of first vaporizer 7 passes through second pipe 16 and contacts, second pipe 16 One end is connected with the first outlet of waste heat boiler 2, the other end of second pipe 16 and the first of waste heat boiler 2 Entrance connects.

Second circulation, the second outlet of waste heat boiler 2 is connected with steam turbine 9 by the 3rd pipeline 17, vapour Turbine 9 is connected with electromotor 10；All of second vaporizer 8 is contacted by the 4th pipeline 18；4th pipe The one end in road 18 is connected with steam turbine 9, the other end of the 4th pipeline 18 and the second entrance of waste heat boiler 2 Connect；Further, the 4th pipeline 18 between steam turbine 9 and the second vaporizer 8 is disposed with condenser 11, condensate pump 12, oxygen-eliminating device 13 and feed pump 14.

It addition, electromotor 10 is connected with mineral hot furnace 1 by electrical network.

As in figure 2 it is shown, the first pipeline 15 is utilidor, by internal layer 15-1, heat-insulation layer 15-2 and outer layer 15-3 forms, and heat-insulation layer 15-2 is arranged between internal layer 15-1 and outer layer 15-3, and heat-insulation layer 15-2 is gathered by PU Urethane or polyurethanes expanded material are made.

Operation principle of the present utility model is: Silicon stone, limestone and reducing agent (coal, metallurgical coke and brown coal are burnt) Smelting in mineral hot furnace 1, the calcium-silicon after smelting falls into grate-cooler 5 by the discharging opening 4 of mineral hot furnace 1 In, in grate-cooler 5, the blower fan of multiple air compartments carries out the cooling substantial amounts of high-temperature flue gas of generation to calcium-silicon blowing, High-temperature flue gas is entered in multiple heat exchanger 3 by petticoat pipe 6 and the first pipeline 15；High-temperature flue gas dissipates in heat exchanger 3 Heat, by the water in two circulating-heating waste heat boilers 2, the two circulation is respectively as follows: in 1. waste heat boilers 2 Water flow into the first vaporizer 7 in multiple heat exchanger 3 successively, in multiple heat exchangers 3 by second pipe 16 High-temperature flue gas dispels the heat, and heats the water in the first vaporizer 7, and the water after heating flows back to waste heat by second pipe 16 In boiler 2, this circulation can be heated continuously in waste heat boiler 2；2. the heat in waste heat boiler 2 Steam enters in steam turbine 9 by the 3rd pipeline 17, and steam turbine 9 converts heat energy into mechanical energy and drives electromotor 10 generate electricity, and after steam turbine 9 acting, exhaust steam is condensed into water by condenser 11, and condensate pump 12 carries Condensation water in condenser 11, to oxygen-eliminating device 13, carries out deoxygenation, finally in the effect of feed pump 14 to condensing water Under be sent in multiple second vaporizer 8 by the 4th pipeline 18, water heats in heat exchanger 3, after heating Water flow to waste heat boiler 2 again, circulate with this.Electromotor 10 is connected with mineral hot furnace 1 by electrical network, generating The electric energy that machine 10 produces flows to mineral hot furnace 1 again and uses, and greatly reduces production cost, obtains good warp Ji benefit.

Owing to the first pipeline 15 is utilidor, the high-temperature flue gas of discharging opening 4 is in the mistake toward heat exchanger 3 conveying Cheng Zhong, greatly reduces the loss of heat so that flue gas keeps dispelling the heat in high temperature input heat exchanger 3, Thus the water in waste heat boiler 2 is heated, save heat energy.

Claims

1. smoke waste heat utilization system, it is characterised in that: include mineral hot furnace (1), waste heat boiler (2) and many Individual heat exchanger (3)；Discharging opening (4) place of described mineral hot furnace (1) is provided with grate-cooler (5), grate-cooler (5) it is provided with multiple air compartment in, each air compartment is provided with a petticoat pipe (6)；The number of petticoat pipe (6) Corresponding with the number of heat exchanger (3), each petticoat pipe (6) and a heat exchanger (3) are by the first pipeline (15) Connect；First vaporizer (7) and second vaporizer (8) it is provided with in each heat exchanger (3)； All of first vaporizer (7) is contacted by second pipe (16), and one end of second pipe (16) is with remaining First outlet of heat boiler (2) connects, the of the other end of second pipe (16) and waste heat boiler (2) One entrance connects；Second outlet of waste heat boiler (2) is by the 3rd pipeline (17) with steam turbine (9) even Connecing, described steam turbine (9) is connected with electromotor (10)；Described first pipeline (15) by internal layer (15-1), Heat-insulation layer (15-2) and outer layer (15-3) composition, heat-insulation layer (15-2) is arranged on internal layer (15-1) and outward Between layer (15-3), heat-insulation layer (15-2) is made up of PU polyurethane or polyurethanes expanded material.

Smoke waste heat utilization system the most according to claim 1, it is characterised in that: all of second evaporation Device (8) is contacted by the 4th pipeline (18)；One end of 4th pipeline (18) is connected with steam turbine (9), The other end of the 4th pipeline (18) is connected with the second entrance of waste heat boiler (2).

Smoke waste heat utilization system the most according to claim 2, it is characterised in that: described steam turbine (9) And it is disposed with condenser (11) on the 4th pipeline (18) between the second vaporizer (8), condenses water Pump (12), oxygen-eliminating device (13) and feed pump (14).

Smoke waste heat utilization system the most according to claim 1, it is characterised in that: described electromotor (10) It is connected with mineral hot furnace (1) by electrical network.