CN210261848U - A converter furnace gas post-treatment and waste heat recovery device - Google Patents
A converter furnace gas post-treatment and waste heat recovery device Download PDFInfo
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- CN210261848U CN210261848U CN201921218145.3U CN201921218145U CN210261848U CN 210261848 U CN210261848 U CN 210261848U CN 201921218145 U CN201921218145 U CN 201921218145U CN 210261848 U CN210261848 U CN 210261848U
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Abstract
本实用新型实施例涉及一种转炉炉气后处理及余热回收装置，所述装置包括：转炉模块、烟罩模块、热交换模块、炉气治理模块、炉气回收模块、排气模块、防爆模块、控制模块；所述热交换模块，用于回收转炉炉气后处理及余热回收装置中余热；所述炉气治理模块，用于净化所述转炉模块中转炉炉气以及回收利用所述转炉模块中颗粒物；所述炉气回收模块，用于回收存储和再利用所述转炉模块中转炉炉气；所述排气模块，用于所述转炉模块中转炉炉气的顺利排放；所述防爆模块，用于超压或爆炸时的安全保护；所述控制模块，用于转炉炉气后处理及余热回收装置的运行监控、调节和数据处理。
The embodiment of the utility model relates to a converter furnace gas post-processing and waste heat recovery device, the device includes: a converter module, a fume hood module, a heat exchange module, a furnace gas treatment module, a furnace gas recovery module, an exhaust module, and an explosion-proof module , control module; the heat exchange module is used to recover the waste heat in the converter furnace gas post-processing and waste heat recovery device; the furnace gas treatment module is used to purify the converter furnace gas in the converter module and recycle the converter module Medium particulate matter; the furnace gas recovery module is used to recover, store and reuse the converter furnace gas in the converter module; the exhaust module is used for the smooth discharge of the converter furnace gas in the converter module; the explosion-proof module , used for safety protection during overpressure or explosion; the control module is used for operation monitoring, adjustment and data processing of the converter gas post-processing and waste heat recovery device.
Description
Technical Field
The embodiment of the utility model provides a relate to steel smelting converter furnace gas technical field, especially relate to a converter furnace gas aftertreatment and waste heat recovery device.
Background
The steel industry is the basic industry of national economy, at present, because there is the problem in aspects such as production technology, management, lead to domestic steel industry process energy consumption value and international advanced level to have the gap, and then recycle a large amount of waste heat, complementary energy in the high temperature furnace gas that produce in the converter steelmaking process, reduce the emission of pollutant in the furnace gas, it is significant to the energy saving and emission reduction of steel industry.
As the converter gas of the converter has the characteristics of flammability and explosiveness (high carbon monoxide content and coexistence with oxygen), intermittence, volatility (the temperature can reach 1650 ℃, the flow rate and the component concentration change are large), wide heat flow range, large dust content (20kg/t steel), high temperature (more than 1000 ℃), large amount of instantaneous gas and the like, the sensible heat of the converter gas is challenged and difficult to efficiently and stably recycle.
In the related art, the conventional flue gas post-treatment and waste heat recovery device is not suitable for treating converter gas. On one hand, the conventional flue gas post-treatment and waste heat recovery device cannot deal with flammable and explosive gases, has huge potential safety hazards, and has certain environmental pollution due to the direct emission of diffused flue gas; on the other hand, sensible heat of converter gas is utilized in a gradient manner, so that the utilization rate of resources can be improved, and the energy consumption of the converter in operation can be reduced. Based on this, there is an urgent need for a converter gas post-treatment and waste heat recovery device in view of the requirements of safety, recycling and harmlessness of converter gas treatment.
SUMMERY OF THE UTILITY MODEL
In view of this, in order to solve the above technical problem or some technical problems, the embodiment of the present invention provides a converter gas post-treatment and waste heat recovery device.
In a first aspect, an embodiment of the utility model provides a converter gas aftertreatment and waste heat recovery device, the device includes: the device comprises a converter module, a smoke hood module, a heat exchange module, a furnace gas treatment module, a furnace gas recovery module, an exhaust module, an explosion-proof module and a control module;
the converter module, the smoke hood module, the heat exchange module and the furnace gas treatment module are sequentially connected, the furnace gas treatment module is respectively connected with the furnace gas recovery module and the exhaust module, the explosion-proof module is respectively connected with the converter module, the smoke hood module, the heat exchange module, the furnace gas treatment module, the furnace gas recovery module and the exhaust module, and the control module is respectively connected with the converter module, the smoke hood module, the heat exchange module, the furnace gas treatment module, the furnace gas recovery module and the exhaust module;
the heat exchange module is used for recovering waste heat in the converter gas post-treatment and waste heat recovery device;
the furnace gas treatment module is used for purifying the furnace gas of the converter in the converter module and recycling particles in the converter module;
the furnace gas recovery module is used for recovering, storing and recycling furnace gas in the converter module;
the exhaust module is used for smoothly discharging converter gas in the converter module;
the explosion-proof module is used for safety protection during overpressure or explosion;
and the control module is used for monitoring and adjusting the operation of the converter gas post-treatment and waste heat recovery device and processing data.
In one possible embodiment, the heat exchange module comprises: vaporization cooling flue submodule, heat accumulation constant temperature submodule, high performance heat exchanger submodule, water/vapour circulation submodule, steam aftertreatment submodule, the burner gas is administered the module and is included: dust removal submodule piece, deacidification submodule piece, the burner gas recovery module includes: furnace gas cupboard module, the catalytic combustion heat transfer chamber submodule piece of diffusion furnace gas, exhaust module includes: a primary air fan submodule, a three-way valve submodule and a diffusing tower submodule;
the converter module the petticoat pipe module the vaporization cooling flue submodule heat accumulation constant temperature submodule high performance heat exchanger submodule dust removal submodule the primary air fan submodule the three-way valve submodule the burner gas cupboard module the diffusion burner gas catalytic combustion heat transfer chamber submodule deacidification submodule the diffusion tower submodule connects gradually, wherein, the three-way valve submodule respectively with the primary air fan submodule connects, with burner gas cupboard module connects, with the diffusion burner gas catalytic combustion heat transfer chamber submodule the deacidification submodule the diffusion tower submodule connects gradually.
In one possible embodiment, the water/steam circulation submodule comprises: the steam drum unit, the steam heat accumulator unit, the condensing unit, the condensate water tank unit, the condensate water pump unit and the variable frequency pump unit are arranged in the steam drum unit;
the inlet of the variable-frequency pump unit is arranged at the bottom of the steam drum unit, so that cavitation erosion can be prevented, and the steam outlet is arranged at the top of the steam drum unit, so that the subsequent normal work can be prevented from being influenced by overhigh steam humidity;
the steam heat accumulator is characterized in that a condensate water tank unit is arranged behind the condensing unit, a condensate water pump unit is arranged between the condensate water tank unit and the steam pocket unit, a steam heat accumulator unit is arranged behind the steam pocket unit, a steam post-processing submodule and the condensing unit are respectively arranged behind the steam heat accumulator unit, and the condensing unit is arranged behind the steam post-processing submodule.
In one possible embodiment, the inlet of the steam drum unit is connected with the heat storage constant temperature sub-module, the high-performance heat exchanger sub-module and the heat exchange chamber sub-module for catalytic combustion of the diffused furnace gas;
and the outlet of the variable frequency pump unit is connected with the vaporization cooling flue submodule, the high-performance heat exchanger submodule and the heat exchange chamber submodule for catalytic combustion of the diffused furnace gas.
In one possible embodiment, the heat-storage thermostatic submodule consists of porous heat-storage bricks.
In one possible embodiment, the high performance heat exchanger sub-module comprises: multistage combination formula firetube heat exchanger.
In one possible embodiment, the dust removal submodule includes at least one of: high-temperature metal bag type dust collector, ceramic pipe net type dust collector, cyclone dust collector, electric dust collection and cloth bag dust collection.
In one possible embodiment, between the heat storage constant temperature sub-module and the high performance heat exchanger sub-module, one of the following may be added: a high-temperature metal bag type dust collector, a ceramic pipe network type dust collector and a cyclone dust collector;
and electric dust removal and cloth bag dust removal can be added between the high-performance heat exchanger sub-module and the primary fan sub-module.
In one possible embodiment, the deacidification sub-module comprises: and the desulfurization unit, the denitrification unit and the dechlorination unit are arranged between the diffusing furnace gas catalytic combustion heat exchange chamber sub-module and the diffusing tower sub-module.
In one possible embodiment, the steam post-treatment submodule adopts a Laval nozzle for steam temperature and pressure increase and reduction, or adopts a heating mode to generate steam with adjustable temperature and pressure.
The embodiment of the utility model provides a converter gas aftertreatment and waste heat recovery device realizes converter gas aftertreatment and waste heat recovery, improves the security performance, reduces the pollutant and discharges, improves waste heat resource utilization efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present specification, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic structural diagram of a converter gas post-treatment and waste heat recovery device according to an embodiment of the present invention;
fig. 2 is a schematic view of the overall structure of a converter gas post-treatment and waste heat recovery device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
To facilitate understanding of the embodiments of the present invention, the following description will be made in terms of specific embodiments with reference to the accompanying drawings, which are not intended to limit the embodiments of the present invention.
As shown in fig. 1, for a schematic structural diagram (part of connecting lines are not shown) of a converter gas post-treatment and waste heat recovery device provided by an embodiment of the present invention, the device may include: the device comprises a converter module 1, a smoke hood module 2, a heat exchange module 3, a furnace gas treatment module 4, a furnace gas recovery module 5, an exhaust module 6, an explosion-proof module 7 and a control module 8.
The heat exchange module 3 is used for recovering waste heat in a converter gas post-treatment and waste heat recovery device, namely recovering system waste heat, and improving the energy utilization rate of the device;
aiming at the furnace gas treatment module 4, purifying the furnace gas of the converter in the converter module and recycling particles in the converter module;
the furnace gas recovery module 5 is used for recovering, storing and reusing furnace gas in the converter module;
aiming at the exhaust module 6, the converter module is used for smoothly discharging converter gas in the converter module;
the explosion-proof module 7 is used for safety protection during converter gas aftertreatment and overpressure or explosion of the waste heat recovery device, namely safety protection of the device during overpressure or explosion of the system;
and the control module 8 is used for monitoring and adjusting the operation of the converter gas post-treatment and waste heat recovery device and processing data.
In an embodiment, the device for post-treatment and waste heat recovery of converter gas in the embodiment of the present invention is designed to have a micro negative pressure of-10 to 0mm water column.
As for the above heat exchange module 3, it may include: a vaporization cooling flue submodule 31, a heat storage constant temperature submodule 32, a high-performance heat exchanger submodule 33, a water/steam circulation submodule 34 and a steam post-processing submodule 35 (which respectively correspond to the vaporization cooling flue 31, the heat storage constant temperature device 32, the high-performance heat exchanger 33, the water/steam circulation submodule 34 and the steam post-processing device 35 shown in fig. 2). Through the mutual matching of the vaporization cooling flue submodule 31, the heat storage constant temperature submodule 32, the high-performance heat exchanger submodule 33 and the water/steam circulation submodule 34, the waste heat power generation, the steam and hot water generation, the preheating of working gas and materials can be realized, and the utilization rate of sensible heat of converter gas is more than or equal to 80%.
For the evaporative cooling flue submodule 31, it includes: flue, refractory material, water-cooling wall, heat insulating material, radiation protection material. The waterwalls may be placed outside the refractory, semi-embedded in the refractory, or placed inside the refractory. The form can adopt a sleeve type water-cooled wall or a mode of circularly and sequentially symmetrically distributing a plurality of pipelines. The temperature of the furnace gas at 1200-1700 ℃ can be reduced to 850-1000 ℃.
The heat storage constant temperature submodule 32 is arranged behind the evaporative cooling flue submodule 31 and is used in combination with the high-performance heat exchanger submodule 33. By adopting the porous heat storage bricks, the temperature of furnace gas at 850-1000 ℃ can be reduced to 550-650 ℃, the temperature of air at the ambient temperature is increased to 550-650 ℃, and the temperature of the furnace gas entering the high-performance heat exchanger sub-module 33 is kept stable. The problems of large heat supply fluctuation, low heat exchange efficiency of a common heat exchanger and the like caused by discontinuous converter gas, large fluctuation, large temperature and heat flux density change of the converter are solved, and the reduction of the operation energy consumption of the converter is facilitated. And the step preheating of working gas (oxygen, nitrogen and the like) and materials (molten iron, scrap steel, batch materials and the like) can also be realized.
For the high performance heat exchanger sub-module 33, it includes: multistage combination formula firetube heat exchanger. The high-performance heat exchanger submodule 33 realizes the multi-stage utilization of furnace gas temperature by designing the pressure (0.1-3MPa), temperature (105-. The temperature span is large, and the temperature of furnace gas at 550-650 ℃ can be reduced to 100-200 ℃. The adaptability is good, and the use requirements of different temperature spans and pressures can be met.
And working parameters of working media at the inlet and the outlet of the multistage combined fire tube heat exchanger are controllable and adjustable. And designing the grade and the type of the heat exchanger according to the temperature span requirement and the working medium requirement. The waste heat power generation can be realized, and superheated steam and hot water with adjustable various pressures and temperatures can be generated for production and living, so that the energy utilization rate is provided. The method is suitable for the characteristics of intermittent converter gas, high instantaneous temperature, large instantaneous heat flux density and large instantaneous gas quantity.
For the steam post-treatment submodule 35, a Laval nozzle is adopted to increase the temperature and reduce the pressure of steam, so that the moisture-containing saturated steam can become micro superheated steam with low superheat degree at 0-10 ℃; or heating to generate steam with adjustable temperature and pressure. The method can realize stable output of steam pressure and temperature, solves the problems that the steam pressure and temperature generated are too low to meet grid-connected requirements due to large heat supply fluctuation caused by intermittent work of the converter, and the like, can improve the quality of recovered energy, and reduce the impact on a steam network.
For the water/steam cycle sub-module 34, it includes: a steam pocket unit 341, a steam heat accumulator unit 342, a condensing unit 343 (corresponding to the condensing means 343 shown in fig. 2), a condensed water tank unit 344, a condensed water pump unit 345, an inverter pump unit 346, and 10-1000 mm pipes between the units. Natural circulation is adopted when the temperature of furnace gas is 800-1600 ℃, and a combined mode of natural circulation and forced circulation is adopted when the temperature is 200-800 ℃. Forced circulation is adopted to facilitate regulation and control; the system is relatively free in arrangement, and can use structures which cannot be adopted by natural circulation; the flow driving force of the working medium can be increased to form control circulation, the circulating flow pressure is obviously enhanced compared with that in natural circulation, and the water wall evaporation surface can be freely arranged; the circulation multiplying power is about 3-10. Water/steam in different states absorbs heat through the heat exchange module, physical state changes of temperature rise, evaporation or overheating occur, and the generated steam and hot water can be used for production and life. The pump may power the circulating water. The water inlet of the variable frequency pump is arranged at the bottom of the steam pocket, so that cavitation erosion can be prevented. The gas outlet of steam is placed at the top of the steam drum, so that the subsequent normal work of the steam drum can be prevented from being influenced by the overlarge humidity of the steam.
For the steam drum unit 341, the connection hub is used for the three processes of heating, evaporating and overheating of the working medium, so that the normal water circulation of the boiler is ensured; a steam-water separation subunit and a continuous blowdown subunit are arranged in the boiler, so that the steam quality of the boiler is ensured; the water has a certain amount of water, has a certain heat storage capacity and relieves the change speed of the steam pressure; the steam drum unit 341 is provided with a pressure gauge, a water level gauge, emergency water discharge, a safety valve and other devices to ensure the safe operation of the boiler.
For the steam accumulator unit 342, a variable pressure accumulator may be included. When the evaporation capacity of the boiler is larger than the steam consumption, redundant steam enters the heat accumulator to heat stored water (saturated water) in the heat accumulator, the steam is condensed in the heat accumulator, and the pressure in the heat accumulator rises along with the steam. When the amount of steam used is greater than the evaporation amount of the boiler, the stored water (saturated water) in the heat accumulator boils due to depressurization, and steam is supplied to keep the boiler load constant. The method can prevent the steam pressure and the water level of the boiler from fluctuating up and down caused by the large fluctuation of the steam consumption in the steam supply system of the industrial boiler, the operation of the boiler is difficult, and the combustion efficiency of the boiler is reduced.
And the condensed water tank unit 344 is used for storing the circulating water recovered by the condensing unit 343.
The inlet of the variable frequency pump unit 346 is arranged at the bottom of the steam drum unit 341 to prevent cavitation, and the outlet of the steam is arranged at the top of the steam drum unit 341 to prevent the subsequent normal operation from being affected by the excessive humidity of the steam.
As for the connection relationship among the steam drum unit 341, the steam heat accumulator unit 342, the condensing unit 343, the condensed water tank unit 344, the condensed water pump unit 345, the variable frequency pump unit 346, and the steam post-processing submodule 35: a condensed water tank unit 344 is provided behind the condensing unit 343, a condensed water pump unit 345 is provided between the condensed water tank unit 344 and the drum unit 341, a steam heat accumulator unit 342 is provided behind the drum unit 341, a steam post-processing sub-module 35 and the condensing unit 343 are provided behind the steam heat accumulator unit 342, respectively, and the condensing unit 343 is provided behind the steam post-processing sub-module 35, as shown in fig. 2. The water outlet of the steam heat accumulator unit 342 may also be connected between the condensed water pump unit 345 and the steam drum unit 341, as shown in fig. 2.
For furnace gas abatement module 4, include: a dust removal submodule 41 and a deacidification submodule 42. The dust removal submodule 41 can condense small particles in the furnace gas, remove large and small particle furnace dust in the furnace gas, and recycle the furnace dust according to specific components, and the deacidification submodule 42 is used for removing acidic substances in the furnace gas, so that the furnace gas is discharged up to the standard.
For the dust removal submodule 41, a cloth bag dust removal is generally adopted in consideration of agglomeration of small particles. At high temperature, such as before the high-performance heat exchanger submodule 33, a high-temperature metal bag type dust collector or a ceramic pipe net type dust collector or a cyclone dust collector can be used for coarse dust removal, and at low temperature, such as after the high-performance heat exchanger submodule 33, electric dust removal and cloth bag dust removal can be combined for fine dust removal. The dust removal effect is good, and the collection and the recycle of dust are convenient.
For deacidification sub-module 42, including: a desulfurization unit 421, a denitrification unit 422 and a dechlorination unit 423 (corresponding to the desulfurization unit 421, the denitrification unit 422 and the dechlorination unit 423 shown in fig. 2, respectively) are arranged between the heat exchange chamber submodule 52 for catalytic combustion of the exhaust gas and the exhaust tower submodule 63. Because the steelmaking raw material contains a small amount of sulfur, sulfur oxides generated after the reaction are discharged along with the furnace gas, and the desulfurization unit 421 can remove the sulfur oxides in the furnace gas, thereby reducing the corrosion to the device; nitrogen in the air possibly generates nitrogen oxides by reacting with oxygen at high temperature and is discharged along with the furnace gas, the nitrogen removal unit 422 can remove the nitrogen oxides in the furnace gas, and the nitrogen oxides in the furnace gas are discharged less than or equal to 50mg/Nm3(ii) a The dechlorination unit 423 may remove chlorine from the furnace gas. Can realize the purification of furnace gas and avoid the environmental pollution of acid rain, photochemical smog and the like. The deacidification submodule 42 adopts an atomizing nozzle, can increase the contact area of gas phase reaction, designs a certain number and special arrangement modes (continuous arrangement, staggered arrangement and the like), and can improve the removal efficiency of acid by 3-5%.
For the furnace gas recovery module 5, it comprises: the furnace gas cabinet module 51 and the diffusing furnace gas catalytic combustion heat exchange chamber submodule 52. The effective coal gas with the carbon monoxide content of more than 35 percent and the oxygen content of less than 1 percent is sent into the furnace gas cabinet module 51 for recycling and storage, and is subjected to post-treatment and reutilization. The diffused gas is sent to the diffusing furnace gas catalytic combustion heat exchange chamber submodule 52, and after excessive carbon monoxide in the furnace gas is removed, the diffused gas is discharged through the diffusing tower submodule 63. The trend of the furnace gas is controlled by adopting a combination mode of a tee joint and a valve, wherein, the sealing performance of the pipeline can be improved by adopting a metal hard sealing butterfly valve, and the purity of the furnace gas is improved.
For the regenerator gas catalytic combustion heat exchange chamber sub-module 52, it includes: combustion chamber, catalyst, carrier, heat exchanger. The residence time of the combustion chamber is designed to be more than 10s, so that the catalytic combustion is ensured to be full, and the emission concentration of carbon monoxide is less than or equal to 1 percent. The heat exchange pipeline is arranged around the combustion chamber and can be designed into a shell-and-tube heat exchanger or a water-cooled wall form for chemical heat utilization of the diffused gas, the heat released by catalytic combustion maintains the temperature required by catalytic reaction on the one hand, and the heat utilization rate of the diffused gas can be more than 60% by heating or overheating circulating cooling water/steam on the other hand.
For the exhaust module 6, it includes: a primary air fan submodule 61, a three-way valve submodule 62 and a diffusing tower submodule 63. The type selection of the induced draught fan can adopt an axial flow fan, and when the system suddenly burns, the pressure can be smoothly released, so that the system is protected from being damaged. The fan adopts a frequency conversion speed regulation mode, and can realize variable flow tracking regulation, thereby not only ensuring the quantity and quality of coal gas recovery, but also having obvious energy-saving effect. The furnace gas recovery module adopts a three-way valve to control the furnace gas trend, wherein, the combination mode of a three-way valve and a metal hard sealing butterfly valve is adopted, and the air tightness of the pipeline can be improved.
Based on the above description, the converter module 1, the smoke hood module 2, the vaporization cooling flue submodule 31, the heat storage constant temperature submodule 32, the high performance heat exchanger submodule 33, the dust removal submodule 41, the primary air fan submodule 61, the three-way valve submodule 62, the furnace gas cabinet module 51, the diffusing furnace gas catalytic combustion heat exchange chamber submodule 52, the deacidification submodule 42 and the diffusing tower submodule are sequentially connected 63, wherein the three-way valve submodule 62 is respectively connected with the primary air fan submodule 61, the furnace gas cabinet module 51, the diffusing furnace gas catalytic combustion heat exchange chamber submodule 52, the deacidification submodule 42 and the diffusing tower submodule 63, and is sequentially connected as shown in fig. 2.
The inlet of the steam drum unit 341 is connected to the heat-storage constant-temperature submodule 32, the high-performance heat exchanger submodule 33 and the heat exchange chamber submodule 52 for catalytic combustion of the exhaust gas, and the outlet of the variable-frequency pump unit 246 is connected to the vaporization cooling flue submodule 31, the high-performance heat exchanger submodule 33 and the heat exchange chamber submodule 52 for catalytic combustion of the exhaust gas, as shown in fig. 2.
In addition, between the heat-storage constant-temperature submodule 32 and the high-performance heat exchanger submodule 33, one of the following may be added: an electric dust collector 412 and a cloth bag dust collector 413 can be added between the high-temperature metal bag type dust collector 411, the ceramic pipe net type dust collector and the cyclone dust collector and between the high-performance heat exchanger submodule 33 and the primary fan submodule 61, as shown in fig. 2.
And the explosion-proof modules 7 are respectively arranged in front of and behind the long straight pipeline, the bent pipeline and the important modules. A plurality of explosion-proof modules can be installed, and the explosion-proof modules with various specifications and models can be selected according to installation safety requirements. The explosion-proof valve is opened automatically to release pressure instantly when the system is over-pressure or explosion, and the valve is reset automatically and sealed when the system pressure is less than the safety set value, so that the secondary backfire explosion of the pipeline is prevented effectively.
The control module 8 comprises a converter control submodule, a smoke hood control submodule, a heat exchange control submodule, a furnace gas treatment control submodule, a furnace gas recovery control submodule, an exhaust control submodule and an explosion-proof control submodule. The method can measure, monitor, control and record the operation parameter data of the important modules, and ensure the safe and efficient operation of the furnace gas recovery process.
For the heat exchange control submodule, data such as dryness, temperature, pressure, flow velocity and the like of working media on two sides in the heat exchange process can be measured, monitored, controlled and recorded, feedback is formed between the data and each link of the heat exchange module, and the safe and efficient operation of the heat exchange process is guaranteed.
For the furnace gas treatment control submodule, the data of the components (particularly S, N, Cl), concentration, temperature, pressure, flow velocity and the like of the furnace gas pollutants can be measured, monitored, controlled and recorded, and the data and various links of the furnace gas treatment module form feedback, so that the safe and efficient operation of the furnace gas treatment process is guaranteed.
For the furnace gas recovery control submodule, the furnace gas component (especially carbon monoxide and oxygen), concentration, temperature, pressure, flow, atmosphere and other data of the furnace gas recovery control submodule can be measured, monitored, controlled and recorded, and feedback is formed between the furnace gas component, the concentration, the temperature, the pressure, the flow, the atmosphere and other data and all links of the furnace gas recovery control submodule. The purpose of the furnace gas is judged according to the components and the concentration of the furnace gas, the flow direction of the furnace gas is controlled by a switch valve, the effective coal gas with the carbon monoxide content of more than 35 percent and the oxygen content of less than 1 percent is sent into a gas chamber for recycling and storage, and the diffused coal gas is sent into a diffused coal gas catalytic combustion chamber. And judging whether the carbon monoxide is near the explosion limit or not according to the concentrations of the carbon monoxide and the oxygen, and carrying out carbon monoxide explosion early warning. The safety problem caused by large fluctuation of components and concentration of the converter gas is solved.
Through the aforesaid to the utility model discloses converter gas aftertreatment and waste heat recovery device's that embodiment provided description:
1. the converter gas post-treatment and waste heat recovery device provided by the embodiment of the utility model does not need fixed equipment with one-to-one correspondence between the fixed converter and the converter gas post-treatment and waste heat recovery device, can meet the furnace gas treatment of a plurality of converters by only needing a single set of equipment, and greatly enhances the applicability of the device;
2. the embodiment of the utility model provides a converter gas aftertreatment and waste heat recovery device, has greatly improved converter gas aftertreatment and waste heat recovery device's security performance, and explosion-proof equipment can satisfy the converter gas security requirement at main device and pipeline;
3. the embodiment of the utility model provides a converter gas aftertreatment and waste heat recovery device, according to the special nature design heat exchange device of converter gas, can satisfy the production demand of converter gas waste heat stable recovery and output, improve waste heat resource utilization efficiency;
4. the converter gas post-treatment and waste heat recovery device provided by the embodiment of the utility model can greatly reduce the emission of pollutants through the dust removal submodule, the deacidification submodule and the furnace gas treatment module;
5. the embodiment of the utility model provides a converter gas aftertreatment and waste heat recovery device can control or independently work through the personnel and realize measurement, supervision, control and the record of each main module of converter gas aftertreatment and waste heat recovery device. The intellectualization of the device is greatly improved, the requirements of post-treatment and waste heat recovery of converter gas of different types can be met, and the working efficiency of the device is improved.
In the process of applying the converter gas aftertreatment and waste heat recovery device provided by the embodiment of the utility model, the flow of the converter gas is as follows:
converter gas enters a smoke hood module from a converter module, a smoke hood is connected with a vaporization cooling flue submodule, and the converter gas is quenched in the vaporization cooling flue submodule; entering a heat storage constant temperature sub-module to stabilize the temperature of furnace gas at 600 ℃; entering a high-temperature metal bag type dust remover or a ceramic pipe network type dust remover for coarse dust removal, and filtering large-particle furnace dust in furnace gas; entering a high-performance heat exchanger submodule for further cooling; entering an electric dust collector and a bag type dust collector for fine dust collection, and filtering small-particle furnace dust in the furnace gas; the primary fan submodule provides power for furnace gas; the three-way valve submodule is connected with the furnace gas recovery module: effective coal gas is introduced into the gas chamber submodule; the diffused gas enters a submodule of a catalytic combustion heat exchange chamber of the diffused gas to remove carbon monoxide in the furnace gas and reduce the temperature of the furnace gas after combustion; entering a deacidification module to remove sulfur, nitrogen and chlorine in the furnace gas; and (4) discharging through a diffusing tower sub-module.
Water/steam flow: saturated water at the lower part of the steam drum unit is pumped to a vaporization cooling flue submodule, a high-performance heat exchanger submodule and a heat exchange chamber submodule for catalytic combustion of diffused furnace gas by a variable frequency pump unit; the steam part is in natural circulation; 1-2MPa steam at each outlet of the heat storage constant temperature submodule, the high-performance heat exchanger submodule and the diffusing furnace gas catalytic combustion heat exchange chamber submodule enters the upper part of the steam drum unit; the steam enters a steam heat accumulator unit, wherein saturated water flows into a steam drum unit, part of dry steam is supplied for production and life, and the other part of the dry steam enters a steam post-processing submodule and is connected with a steam net and is connected to the grid; the condensed water enters a condensing unit to be condensed and flows into a condensed water tank unit; and finally, pumping the steam to the lower part of the steam drum unit by a condensate pump unit.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, a software module executed by a processor, or a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110331251A (en) * | 2019-07-30 | 2019-10-15 | 中国科学院力学研究所 | A kind of post-processing of converter gas and waste-heat recovery device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331251A (en) * | 2019-07-30 | 2019-10-15 | 中国科学院力学研究所 | A kind of post-processing of converter gas and waste-heat recovery device |
| WO2021018030A1 (en) * | 2019-07-30 | 2021-02-04 | 中国科学院力学研究所 | Converter gas aftertreatment and waste heat recovery device |
| CN110331251B (en) * | 2019-07-30 | 2023-12-12 | 中国科学院力学研究所 | Converter gas aftertreatment and waste heat recovery device |
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