CN201411468Y - Converter gas purification and afterheat recovery system for steelmaking - Google Patents
Converter gas purification and afterheat recovery system for steelmaking Download PDFInfo
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- CN201411468Y CN201411468Y CN200920108663XU CN200920108663U CN201411468Y CN 201411468 Y CN201411468 Y CN 201411468Y CN 200920108663X U CN200920108663X U CN 200920108663XU CN 200920108663 U CN200920108663 U CN 200920108663U CN 201411468 Y CN201411468 Y CN 201411468Y
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- cleaning apparatus
- waste heat
- heat boiler
- gas purification
- coal gas
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The utility model discloses a converter gas purification and afterheat recovery system for steelmaking. The converter gas purification and afterheat recovery system comprises a dust collector, an afterheat boiler communicated with the dust collector, a gas recovery and discharge device communicated with the dust collector and a terminal device, wherein a cooling water pipe is arranged in the afterheat boiler; and the terminal device is communicated with the outlet of the cooling water pipe in the afterheat boiler through a steam collecting device. The converter gas purification and afterheat recovery system can cool the gas through the afterheat boiler so as to maximally recover the afterheat of the converter gas without the need of a huge sewage processing system, thereby obviating the direct spray cooling or water spray cooling manner of the prior art, saving energy and reducing emission.
Description
Technical field
The utility model relates to a kind of steel converter coal gas purification and heat recovery system, particularly utilizes system about a kind of coal gas of steel-smelting revolving furnace with dry method dedusting and waste heat recovery air-conditioning.
Background technology
Oxygen converter steelmaking adopts oxygen blast to smelt, and in converting process, can produce the high-temperature gas that contains volume of smoke and CO, and smoke content is up to 100～150g/Nm
3, temperature is up to 1450 ℃, and the back dedusting that therefore must cool earlier is called for short flue gas ash removal of converter.
At present, flue gas dust collecting system of converter mainly contains two kinds: the one, and extensively adopted " OG " wet method system; The 2nd, be the dry method system of representative with " LT " method.
The common technical process of wet method " OG " system is: as shown in Figure 1, converter gas is after movable gas hood, gasification cooling flue cooling, reduce to about 800 ℃ by 1600 ℃, entering the adjustable aditus laryngis Venturi meter of spray column/sizing overflow Venturi meter and circular seam type then further lowers the temperature and dedusting, again after the dehydration of whirlwind spray gun water trap, the qualified coal gas that will be reached the coal-gas recovering requirement by induced draft fan is stored in the gas chamber by the recovery valve group, and the flue gas that does not reach the coal-gas recovering requirement enters and diffuses chimney igniting discharging.
Above-mentioned " OG " wet method exists that quantity of circulating water is big, system's power consumption height, floor space are big, dust discharge index (≤50mg/Nm3) defective such as higher.
The common technical process of dry method " LT " system is: as shown in Figure 2, converter gas is after movable gas hood, gasification cooling flue cooling, directly cool off with evaporative cooler again, promptly to spraying into atomized water by the flue gas in the evaporative cooler, the water yield that wherein sprays into, will be exactly decide with the heat content that produces hot gas flow in the STEELMAKING PRODUCTION process, flue gas is cooled to 150 ℃～200 ℃ after, carry out smart dedusting via gas line introducing electric precipitator; Enter the coal gas switching station by induced draft fan then, qualified coal gas further enters gas chamber after the cooling through gas cooler, and underproof coal gas is through diffusing chimney igniting discharging.
Above-mentioned " LT " though dry method improved efficiency of dust collection, reduced system resistance and decrease, do not need huge sludge treating system, but converter gas still adopts the spraying and the direct refrigerative mode of spraying water to lower the temperature in time below 1000 ℃, about 50% heat energy has been slatterned in vain, therefore so-called " LT " dry method is not a water not, also need to consume part recirculated water, do not reach the optimum target of saving water and energy.
The utility model content
The purpose of this utility model is, a kind of steel converter coal gas purification and heat recovery system are provided, and it does not need sewage and Sewage treatment systems, can fully reclaim waste gas residual heat and with its utilization.
Above-mentioned purpose of the present utility model can adopt following technical proposal to realize,
A kind of steel converter coal gas purification and heat recovery system, it comprises: cleaning apparatus; Waste heat boiler, it is communicated in described cleaning apparatus, is provided with cooling water pipeline in the described waste heat boiler; Coal-gas recovering and discharge equipment, it is communicated in described cleaning apparatus; Terminating set, it is connected by the outlet of vapor collection device with the cooling water pipeline of described waste heat boiler.
In preferred embodiment, described waste heat boiler comprises radiation formula waste heat boiler and convection type waste heat boiler, is equipped with described cooling water pipeline in described radiation formula waste heat boiler and the convection type waste heat boiler; Described radiation formula waste heat boiler and convection type waste heat boiler are connected with described cleaning apparatus respectively.
In preferred embodiment, described cleaning apparatus comprises thick cleaning apparatus and smart cleaning apparatus; Described steel-making converter is connected with described smart cleaning apparatus by described radiation formula waste heat boiler, thick cleaning apparatus, convection type waste heat boiler successively.
In preferred embodiment, described thick cleaning apparatus is ceramic high temperature fly-ash separator or metallic high temperature fly-ash separator; Described smart cleaning apparatus is sack cleaner, metal dusting device, sintered plate fly-ash separator or electric precipitator.
In preferred embodiment, described convection type waste heat boiler and described bottom thick, smart cleaning apparatus are equipped with the sealing ash exhauster.
In preferred embodiment, described coal-gas recovering and discharge equipment comprise recovery valve group, induced draft fan, discharging unit for discharging and recovery part, described cleaning apparatus is via described induced draft fan, and switches with discharging unit for discharging with described recovery part respectively by described recovery valve group and to be connected.
In preferred embodiment, described discharging unit for discharging is for diffusing chimney, and described recovery part is a gas chamber.
In preferred embodiment, described recovery valve group comprises T-valve and variable valve; Described variable valve is connected between described induced draft fan and the described cleaning apparatus; Three ports of described T-valve are connected with described induced draft fan, discharging unit for discharging and recovery part respectively.
In preferred embodiment, described recovery valve group also comprises by-pass valve and water seal reverse checkvalve; Described water seal reverse checkvalve is connected between described T-valve and the described recovery part, and described by-pass valve and described T-valve are connected in parallel.
In preferred embodiment, described system also comprises the coal gas evaporative cooler, and it is installed on the inlet duct of described induced draft fan.
In preferred embodiment, described vapor-recovery unit is the steam drum.
In preferred embodiment, described terminating set is an air-conditioning system.
Characteristics of the present utility model and advantage are:
1, it does not need sewage and Sewage treatment systems fully, can fully reclaim waste gas residual heat, and it is applied to air-conditioning system;
2, adopt lithium bromide refrigerating and heat-exchanger rig, can improve the comprehensive utilization ratio of caloric power of gas, realized energy-saving and cost-reducing;
3, it is to adopt absolutely dry method dust-removal system, so can guarantee to reclaim gas dust concentration below 10mg/Nm3, does not need further smart dedusting directly to use for the user.
4, plant area's affiliated facility can adopt central air conditioning, so can reduce the management inconvenience that the dispersed placement air-conditioning brings, and also can increase the air-conditioned room utilization ratio.
Description of drawings
The following drawings only is intended to the utility model done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein,
Fig. 1 is the common process flow sheet of wet method " OG " system in the correlation technique;
Fig. 2 is the common process flow sheet of dry method " LT " system in the correlation technique;
Fig. 3 is the process diagram of steel converter coal gas purification of the present utility model and heat recovery system.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 3, the utility model proposes a kind of steel converter coal gas purification and heat recovery system, it comprises cleaning apparatus, waste heat boiler, coal-gas recovering and discharge equipment and terminating set 1.Described waste heat boiler is communicated in cleaning apparatus, is provided with cooling water pipeline in the described waste heat boiler; Described coal-gas recovering and discharge equipment are communicated in cleaning apparatus; Described terminating set 1 is connected by the outlet of vapor collection device 2 with the cooling water pipeline of described waste heat boiler.
High temperature converter gas in the steel-making converter 3 of the present utility model, capture wherein dust by cleaning apparatus, cooling water pipeline in high temperature converter gas and the waste heat boiler carries out heat exchange, make that converter gas is lowered the temperature, and the water coolant in the cooling water pipeline is heated and produces steam, this steam is collected by vapor collection device 2, and is utilized by terminating set 1; In addition, the coal gas after the waste heat boiler cooling reclaims or discharges by coal-gas recovering and discharge equipment.That is to say, the utility model has been cancelled the spraying in the correlation technique or the direct cooling mode of water spray cooling down high-temperature coal gas of converter, neither need huge Sewage treatment systems by waste heat boiler cooling coal gas, reclaim the waste heat of coal gas of converter again to greatest extent, thereby reached the effect of energy-saving and emission-reduction.
In concrete embodiment, described waste heat boiler comprises radiation formula waste heat boiler 51 and convection type waste heat boiler 52, be provided with described cooling water pipeline 53 in the described convection type waste heat boiler 52, also be provided with the cooling water pipeline (not shown) in the described radiation formula waste heat boiler 51; Described radiation formula waste heat boiler 51 and convection type waste heat boiler 52 are connected with described cleaning apparatus respectively.Furthermore, cooling water pipeline has entrance and exit, and water coolant flows into from inlet, is heated generation steam in pipeline, and steam enters vapor collection device 2 from outlet.
Wherein, also automatic ash removing device can be set on the cooling water pipeline 53 in the described convection type waste heat boiler 52, it is used to remove the dust on the cooling water pipeline 53, carries out heat exchange to avoid influencing cooling water pipeline 53 with flue gas; Described automatic ash removing device is well known to those skilled in the art, so no longer describe in detail.
Described cleaning apparatus comprises thick cleaning apparatus 41 and smart cleaning apparatus 42, and described steel-making converter 3 is connected with described smart cleaning apparatus 42 by described radiation formula waste heat boiler 51, thick cleaning apparatus 41, convection type waste heat boiler 52 successively.Wherein, described thick cleaning apparatus 41 can be ceramic high temperature fly-ash separator or metallic high temperature fly-ash separator; , to capture big dust particle; Described smart cleaning apparatus 42 can be sack cleaner, metal dusting device, sintered plate fly-ash separator or electric precipitator, herein, smart cleaning apparatus 42 is a sack cleaner, it is a round tube type, and the coal gas explosion device can be installed, described coal gas explosion device is known by those skilled in the art, so no longer describe in detail.
Wherein, be equipped with sealing ash exhauster 6 in the bottom of described convection type waste heat boiler 52 and described thick, smart cleaning apparatus 41,42, be the nitrogen-sealed ash exhauster herein, the nitrogen-sealed ash exhauster generally comprises nitrogen seal device and ash exhauster, nitrogen seal device is the gas leak that is used for avoiding convection type waste heat boiler 52 and thick, smart cleaning apparatus 41,42, and ash exhauster can be discharged the dust that is trapped in good time.Wherein nitrogen seal device and ash exhauster are well known to those skilled in the art, so be not described in detail.
In preferred implementation, coal-gas recovering and discharge equipment comprise recovery valve group, induced draft fan 71, discharging unit for discharging 72 and recovery part 73, described cleaning apparatus (herein being smart cleaning apparatus 42) is via induced draft fan 71, and switches with discharging unit for discharging 72 with described recovery part 73 respectively by described recovery valve group and to be connected; That is to say, under the effect of induced draft fan 71, be sent to discharging unit for discharging 72 or recovery part 73 through the waste heat boiler cooling and through the converter gas after the cleaning apparatus dedusting, wherein qualified coal gas is sent to recovery part 73 and stores, defective flue gas is sent to discharging unit for discharging 72 and diffuses, and realization is switched in diffusing by the recovery valve group of the recovery of qualified coal gas and defective flue gas.
Wherein, described discharging unit for discharging 72 can be and diffuses chimney, and defective flue gas is sent to and diffuses the chimney discharging of lighting a fire; Described recovery part 73 can be gas chamber, and qualified coal gas is stored in the gas chamber.
In preferred implementation, the recovery valve group comprises T-valve 74 and variable valve 75; Described variable valve 75 is installed on the exit of smart cleaning apparatus 42, is herein to be connected between described induced draft fan 71 and the described smart cleaning apparatus 42, and it is used to regulate the fire door elementary errors pressure of steel-making converter 3; Three ports of described T-valve 74 are connected with described induced draft fan 71, discharging unit for discharging 72 and recovery part 73 respectively, and realization is switched in diffusing by T-valve 74 of the recovery of qualified coal gas wherein and defective flue gas.
In addition, the recovery valve group also can comprise water seal reverse checkvalve 76, by-pass valve 77 and water seal 78; Described water seal reverse checkvalve 76 is connected between described T-valve 74 and the described water seal 78, described water seal 78 is connected between described water seal reverse checkvalve 76 and the described recovery part 73, the effect of water seal reverse checkvalve 76 is: when not reclaiming coal gas, it and T-valve are united and are used in quick acting switching-off coal gas, prevent that the coal gas that gas chamber stores from blowing back into blower fan; By-pass valve 77 is connected in parallel with T-valve 74, and the effect of by-pass valve 77 is: when T-valve by reclaiming to diffusing when switching, in case break down, but the emergency opening by-pass valve is to guarantee safety.The effect of water seal 78 is: when blower fan system was shut down maintenance, it and T-valve were united use, play the effect of cutting off coal gas fully.
In preferred implementation, described system also comprises coal gas evaporative cooler 8, and it is installed on the inlet duct of induced draft fan 71, and coal gas evaporative cooler 8 is used for further cooling off the temperature of converter gas.
In preferred implementation, described vapor-recovery unit 2 is the steam drum, it is used for collecting the steam that cooling water pipeline produced from waste heat boiler, furthermore, the steam that the high-temperature flue gas waste heat that reclaims by radiation formula waste heat boiler 51 produces, the steam that produces with the middle temperature fume afterheat that reclaims by convection type waste heat boiler 52 all enters the steam drum, sends into terminating set 1 then.That is to say, vapor-recovery unit 2 fully reclaimed converter gas from high temperature to the waste heat of temperature, this heat can be used for the terminating set 1 of steelworks on the spot, air-conditioning system for example so can reach the purpose of energy-saving and emission-reduction preferably.
Wherein, air-conditioning system can comprise lithium bromide refrigerating unit 11, interchanger 12, air conditioner water waterworks 13 and air-conditioner tail end equipment capable 14.Air-conditioning system in use, summer, steam entered lithium bromide refrigerating unit 11 when using refrigeration air-conditioner, unit cooler 11 produces refrigerated waters and delivers to air-conditioner tail end equipment capable 14 through water pump, for example each system of central air-conditioning; Winter, steam entered interchanger 12 when using cooling/heating air conditioner, and interchanger 12 produces hot water and delivers to each system of central air-conditioning through water pump.The structure and the principle of air-conditioning system are well known to those skilled in the art, so be not described in detail.
Certainly, terminating set 1 can also be other suitable device except air-conditioning system, for example water-heater etc.
In addition, described system also comprises coal gas self-closing explosion venting device (not shown), and it is installed on cleaning apparatus and the system pipeline, owing to coal gas self-closing explosion venting device is known by those skilled in the art, so no longer describe in detail.
The converter gas that produces in the steel-making converter 3 of the present utility model, after the cooling water pipeline heat absorption of radiation formula waste heat boiler 51, flue-gas temperature is reduced to 1000 ℃ by 1450 ℃, and the water in the cooling water pipeline is heated and the steam that produces enters the steam drum simultaneously; Flue gases in the radiation formula waste heat boiler 51 lead to rough cleaner 41 by pipeline, i.e. ceramic high temperature fly-ash separator, and the big dust particle in the flue gas is captured in the ceramic high temperature fly-ash separator; Afterwards, flue gas enters in the convection type waste heat boiler 52, makes flue-gas temperature reduce to 250 ℃ by 1000 ℃, and simultaneously the water in the cooling water pipeline in the convection type waste heat boiler 52 are heated and the steam that produces also enters the steam drum; Flue gas after 52 coolings of convection type waste heat boiler enters smart cleaning apparatus 42, i.e. further smart dedusting in the sack cleaner; Flue gas after the smart dedusting enters coal gas evaporative cooler 8 and cools be sent to induced draft fan 71 after 72 ℃; Realization is switched in diffusing by the T-valve in the recovery valve group 74 of the recovery of qualified coal gas and defective flue gas, and qualified coal gas is sent in the gas chamber to be stored, and defective coal gas is sent to and diffuses the chimney discharging of being lighted a fire.
The above only is several embodiment of the present utility model, and those skilled in the art can carry out various changes or modification to the utility model embodiment and do not break away from spirit and scope of the present utility model according to application documents are disclosed.
Claims (12)
1, a kind of steel converter coal gas purification and heat recovery system is characterized in that, described system comprises:
Cleaning apparatus;
Waste heat boiler, it is communicated in described cleaning apparatus, is provided with cooling water pipeline in the described waste heat boiler;
Coal-gas recovering and discharge equipment, it is communicated in described cleaning apparatus;
Terminating set, it is connected by the outlet of vapor collection device with the cooling water pipeline of described waste heat boiler.
2, steel converter coal gas purification according to claim 1 and heat recovery system, it is characterized in that, described waste heat boiler comprises radiation formula waste heat boiler and convection type waste heat boiler, is equipped with described cooling water pipeline in described radiation formula waste heat boiler and the convection type waste heat boiler; Described radiation formula waste heat boiler and convection type waste heat boiler are connected with described cleaning apparatus respectively.
3, steel converter coal gas purification according to claim 2 and heat recovery system is characterized in that, described cleaning apparatus comprises thick cleaning apparatus and smart cleaning apparatus; Described steel-making converter is connected with described smart cleaning apparatus by described radiation formula waste heat boiler, thick cleaning apparatus, convection type waste heat boiler successively.
4, steel converter coal gas purification according to claim 3 and heat recovery system is characterized in that, described thick cleaning apparatus is ceramic high temperature fly-ash separator or metallic high temperature fly-ash separator; Described smart cleaning apparatus is sack cleaner, metal dusting device, sintered plate fly-ash separator or electric precipitator.
5, steel converter coal gas purification according to claim 3 and heat recovery system is characterized in that, described convection type waste heat boiler and described bottom thick, smart cleaning apparatus are equipped with the sealing ash exhauster.
6, according to each described steel converter coal gas purification of claim 1-5 and heat recovery system, it is characterized in that, described coal-gas recovering and discharge equipment comprise recovery valve group, induced draft fan, discharging unit for discharging and recovery part, described cleaning apparatus is via described induced draft fan, and switches with discharging unit for discharging with described recovery part respectively by described recovery valve group and to be connected.
7, steel converter coal gas purification according to claim 6 and heat recovery system is characterized in that, described discharging unit for discharging is for diffusing chimney, and described recovery part is a gas chamber.
8, steel converter coal gas purification according to claim 6 and heat recovery system is characterized in that, described recovery valve group comprises T-valve and variable valve; Described variable valve is connected between described induced draft fan and the described cleaning apparatus; Three ports of described T-valve are connected with described induced draft fan, discharging unit for discharging and recovery part respectively.
9, steel converter coal gas purification according to claim 8 and heat recovery system is characterized in that, described recovery valve group also comprises by-pass valve and water seal reverse checkvalve; Described water seal reverse checkvalve is connected between described T-valve and the described recovery part, and described by-pass valve and described T-valve are connected in parallel.
10, steel converter coal gas purification according to claim 6 and heat recovery system is characterized in that, described system also comprises the coal gas evaporative cooler, and it is installed on the inlet duct of described induced draft fan.
According to each described steel converter coal gas purification of claim 1-5 and heat recovery system, it is characterized in that 11, described vapor-recovery unit is the steam drum.
12, steel converter coal gas purification according to claim 11 and heat recovery system is characterized in that, described terminating set is an air-conditioning system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920108663XU CN201411468Y (en) | 2009-05-31 | 2009-05-31 | Converter gas purification and afterheat recovery system for steelmaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920108663XU CN201411468Y (en) | 2009-05-31 | 2009-05-31 | Converter gas purification and afterheat recovery system for steelmaking |
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| CN201411468Y true CN201411468Y (en) | 2010-02-24 |
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| CN200920108663XU Expired - Lifetime CN201411468Y (en) | 2009-05-31 | 2009-05-31 | Converter gas purification and afterheat recovery system for steelmaking |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892089A (en) * | 2010-08-04 | 2010-11-24 | 中冶京诚工程技术有限公司 | Electric furnace gas purification and reclamation equipment |
| CN102681471A (en) * | 2011-03-10 | 2012-09-19 | 中国恩菲工程技术有限公司 | Method for controlling stop of smelting |
| CN102978333A (en) * | 2012-11-19 | 2013-03-20 | 首钢总公司 | System and method for converter gas recovery |
| CN104096436A (en) * | 2013-04-12 | 2014-10-15 | 无锡市西漳环保设备有限公司 | Microfiltration method for treating PM2.5 particulates in hot rolling mill |
| CN107828447A (en) * | 2017-11-08 | 2018-03-23 | 中科合肥煤气化技术有限公司 | A kind of high temperature heating gas waste heat recovery refrigerating plant |
| CN107904353A (en) * | 2017-11-23 | 2018-04-13 | 华北理工大学 | A kind of converter gas waste heat reclaiming process |
-
2009
- 2009-05-31 CN CN200920108663XU patent/CN201411468Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892089A (en) * | 2010-08-04 | 2010-11-24 | 中冶京诚工程技术有限公司 | Electric furnace gas purification and reclamation equipment |
| CN101892089B (en) * | 2010-08-04 | 2013-10-16 | 中冶京诚工程技术有限公司 | Electric furnace gas purification and reclamation equipment |
| CN102681471A (en) * | 2011-03-10 | 2012-09-19 | 中国恩菲工程技术有限公司 | Method for controlling stop of smelting |
| CN102978333A (en) * | 2012-11-19 | 2013-03-20 | 首钢总公司 | System and method for converter gas recovery |
| CN102978333B (en) * | 2012-11-19 | 2014-08-27 | 首钢总公司 | System and method for converter gas recovery |
| CN104096436A (en) * | 2013-04-12 | 2014-10-15 | 无锡市西漳环保设备有限公司 | Microfiltration method for treating PM2.5 particulates in hot rolling mill |
| CN107828447A (en) * | 2017-11-08 | 2018-03-23 | 中科合肥煤气化技术有限公司 | A kind of high temperature heating gas waste heat recovery refrigerating plant |
| CN107904353A (en) * | 2017-11-23 | 2018-04-13 | 华北理工大学 | A kind of converter gas waste heat reclaiming process |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100224 Effective date of abandoning: 20090531 |