CN214426448U - L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler - Google Patents

L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler Download PDF

Info

Publication number
CN214426448U
CN214426448U CN202023111571.2U CN202023111571U CN214426448U CN 214426448 U CN214426448 U CN 214426448U CN 202023111571 U CN202023111571 U CN 202023111571U CN 214426448 U CN214426448 U CN 214426448U
Authority
CN
China
Prior art keywords
flue
flue gas
shaped
steam
horizontal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202023111571.2U
Other languages
Chinese (zh)
Inventor
林仟国
杨玉慧
陈长景
程立春
曹华
杨玉
朱港林
蒋俊杰
赵国平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Dongjiu Heavy Industry Co ltd
Original Assignee
Jiangsu Dongjiu Heavy Industry Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Dongjiu Heavy Industry Co ltd filed Critical Jiangsu Dongjiu Heavy Industry Co ltd
Priority to CN202023111571.2U priority Critical patent/CN214426448U/en
Application granted granted Critical
Publication of CN214426448U publication Critical patent/CN214426448U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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

Landscapes

  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The utility model discloses an L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler, which comprises an L-shaped flue, a flue gas outlet and a flue gas inlet which are respectively arranged on the L-shaped flue; the L-shaped flue comprises a vertical flue and a horizontal flue; the vertical flue is of a shaft type structure, and a water protection section, a steam superheater and an evaporator are arranged in the vertical flue in sequence according to the flow direction of flue gas; the horizontal flue is of a horizontal tunnel kiln type structure, and a coal economizer is arranged in the horizontal flue; the flue gas inlet is arranged at the top end of the vertical flue, the lower end of the vertical flue is communicated with the horizontal flue, and the flue gas outlet is arranged at the tail end of the horizontal flue; a steam pocket is arranged on one side of the vertical flue; one end of the economizer is communicated with a water supply pipe network, the other end of the economizer is communicated with a steam pocket, the water protection section, the evaporator and the steam pocket form a steam-water natural circulation loop through an eduction pipe and a downcomer, one end of the steam superheater is connected with the steam pocket, and the other end of the steam superheater is connected with the steam pipe network. The utility model provides a hot stove flue gas heat energy waste's in ferroalloy ore deposit problem.

Description

L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler
Technical Field
The invention relates to a boiler, in particular to an L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler.
Background
In the existing process production technology, most ferroalloy products are produced by an electric heating method, have high dependence on electric energy, belong to high-energy consumption industry, and are key industries for energy conservation and emission reduction in national industrial planning. In recent years, the demand of the market on ferroalloy products is continuously increased, and meanwhile, due to energy shortage, high raw material price and severe environmental pollution problem, the national level further increases the strength of relevant energy-saving and emission-reducing policies, and the energy-saving and emission-reducing problems of the submerged arc furnace are particularly prominent.
The ore furnace usually adopts carbonaceous reducing agent to produce silicon series, manganese series, chromium series and other iron alloy products, and a large amount of N is produced in the production process2、CO、CO2、H2High-temperature flue gas with equal components. In the process of producing the ferroalloy, the heat carried by the flue gas is equivalent to 50 percent of the total energy required by smelting. Based on the principle of efficient energy utilization, reasonable process technical parameters are selected to recycle the waste heat of the flue gas of the submerged arc furnace, so that the unit energy consumption of the submerged arc furnace is reducedMeanwhile, the environment pollution can be reduced, and the method is an energy-saving and emission-reducing project advocated by the nation.
The waste heat of the flue gas refers to heat energy which is not effectively utilized in the ore smelting furnace or is not reasonably utilized in the smelting process. The waste heat recovery not only can recycle energy, but also can reduce the temperature of the flue gas, so that the subsequent environment-friendly dust removal system can continuously work within a proper temperature range. With the continuous improvement and development of ferroalloy production technology and technology, under the large environment of national regulation structure for capacity, energy conservation, consumption reduction and high-efficiency utilization of waste heat enable green smelting.
In the prior art, the flue gas discharged by the ferroalloy submerged arc furnace is usually cooled by an air cooler, and the heat carried by the flue gas cannot be effectively recovered and utilized. Therefore, the development of the submerged arc furnace flue gas waste heat boiler has important significance. The invention is provided in the process of realizing a novel industrialized road under the large background of building resource-saving and environment-friendly society in China, aims to promote low-energy-consumption production in the steel smelting industry, realizes circular economy and has good environmental benefit and social benefit.
Disclosure of Invention
The utility model aims at providing a hot stove flue gas waste heat boiler in L type ferroalloy ore deposit, hot stove flue gas waste heat boiler in L type ferroalloy ore deposit has solved the hot stove flue gas heat energy waste's of ferroalloy ore deposit problem.
In order to achieve the technical purpose, the utility model adopts the following technical proposal:
an L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler comprises an L-shaped flue, and a flue gas outlet and a flue gas inlet which are respectively arranged on the L-shaped flue;
the L-shaped flue comprises a vertical flue and a horizontal flue; wherein:
the vertical flue is of a shaft type structure, and a water protection section, a steam superheater and an evaporator are arranged in the vertical flue in sequence according to the flow direction of flue gas;
the horizontal flue is of a horizontal tunnel kiln type structure, and a coal economizer is arranged in the horizontal flue;
the flue gas inlet is arranged at the top end of the vertical flue, the lower end of the vertical flue is communicated with the horizontal flue, and the flue gas outlet is arranged at the tail end of the horizontal flue;
a steam pocket is arranged on one side of the vertical flue; one end of the economizer is communicated with a water supply pipe network, the other end of the economizer is communicated with a steam pocket, a water protection section, the evaporator and the steam pocket form a steam-water natural circulation loop through an eduction pipe and a downcomer, one end of the steam superheater is connected with the steam pocket, and the other end of the steam superheater is connected with the steam pipe network;
the flue gas inlet is communicated with a flue gas pipeline of the submerged arc furnace, and the flue gas outlet is communicated with a flue gas process system of the submerged arc furnace.
Preferably, the water protection section, the steam superheater and the evaporator are all of building block type pipe box structures; the modular tube box structure comprises a heat exchange tube group A and a shell, wherein the heat exchange tube group A is vertically suspended in the shell.
Preferably, the heat exchange tube group a is arranged in an in-line manner, and the heat transfer surface tubes of the heat exchange tube group a are needle tubes.
Preferably, a gas pulse soot blower is arranged on the shell.
Preferably, the economizer is of a building block type module structure and comprises a top cover and a plurality of economizer modules; each economizer module comprises a heat exchange tube group B; and all the heat exchange tube groups B are supported and suspended in the horizontal flue through a top cover arranged at the top of the horizontal flue and are distributed on the top cover in a building block manner.
Preferably, the heat exchange tube group B is arranged in series, and the heat transfer surface tubes of the heat exchange tube group B are needle tubes.
Preferably, the needle-shaped pipe comprises a base pipe and cylindrical welding needles uniformly welded on the normal line of the base pipe.
Preferably, the horizontal flue is provided with a gas pulse soot blower on the furnace wall between two adjacent groups of economizer modules.
Preferably, an ash hopper is arranged at the bottom end of the horizontal flue, and an automatic ash discharging device is arranged at an ash discharging port of the ash hopper.
According to the technical scheme, the flue gas waste heat boiler adopting the L-shaped ferroalloy submerged arc furnace has the following advantages and effects:
1. the water protection section of the flue gas waste heat boiler of the L-shaped ferroalloy submerged arc furnace, the steam superheater, the evaporator and the economizer are assembled in a factory for fast assembly and shipment, so that the installation efficiency of an installation site is greatly improved, the construction cost of the boiler is reduced, and the capital expenditure of ferroalloy production enterprises is saved.
2. Steam generated by the flue gas waste heat boiler of the ferroalloy submerged arc furnace is merged into a plant pipe network for production and living, so that the operation cost of production enterprises is reduced.
3. After the ferroalloy submerged arc furnace flue gas waste heat boiler is put into operation, the heat of the submerged arc furnace exhaust flue gas (the temperature is 500 ℃) can be efficiently recovered, and the economic and environmental benefits are obvious.
Drawings
FIG. 1 is a schematic structural view of a flue gas waste heat boiler of an L-shaped ferroalloy submerged arc furnace of the present invention;
FIG. 2 is a schematic view of a needle-shaped tube structure according to the present invention;
in the figure: 1. the device comprises a flue, 2, a vertical flue, 3, a horizontal flue, 4, a flue gas inlet, 5, a flue gas outlet, 6, a water protection section, 7, a steam superheater, 8, an evaporator, 9, a coal economizer, 10, a steam pocket, 11, an outlet pipe, 12, a down pipe, 13, a needle-shaped pipe, 14, a base pipe, 15, a cylindrical welding needle, 16, a gas pulse soot blower, 17, a dust hopper and 18, and an automatic soot discharging device.
Detailed Description
The attached drawings disclose a schematic structural diagram of a preferred embodiment of the invention in a non-limiting way; the technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses a flue gas waste heat boiler of L type ferroalloy submerged arc furnace, including L type flue 1, the flue is vertical, horizontal combination arranges, and vertical flue 2 is shaft type structure, and horizontal flue 3 is horizontal tunnel kiln formula structure, and the top of vertical flue 2 is equipped with flue gas inlet 4, and the tail end of horizontal flue 3 is equipped with flue gas outlet 5, flue gas inlet 4 and submerged arc furnace flue gas pipeline intercommunication, flue gas outlet 5 and submerged arc furnace flue gas process system intercommunication; a water protection section 6, a steam superheater 7 and an evaporator 8 are arranged in the vertical flue 2 in sequence according to the flow direction of flue gas, an economizer 9 is arranged in the horizontal flue 3, and a steam pocket 10 is arranged on one side of the vertical flue 2; one end of the coal economizer 9 is communicated with a water supply pipe network, the other end of the coal economizer is communicated with a steam drum 10, the water protection section 6, the evaporator 8 and the steam drum 10 form a steam-water natural circulation loop through an eduction pipe 11 and a downcomer 12, one end of the steam superheater 7 is connected with the steam drum, and the other end of the steam superheater is connected with the steam pipe network.
The water protection section 6, the steam superheater 7 and the evaporator 8 are of a building block type pipe box structure, the building block type pipe box structure comprises a heat exchange pipe group A and a shell, and the heat exchange pipe group A is vertically suspended in the shell.
The economizer 9 is of a building block type module structure and comprises a top cover and a plurality of economizer modules; each economizer module comprises a heat exchange tube group B; and all the heat exchange tube groups B are supported and suspended in the horizontal flue through a top cover arranged at the top of the horizontal flue and are distributed on the top cover in a building block manner.
The heat exchange tube group A, B is arranged in a row, the heat transfer surface tube is a needle-shaped tube 13, and the needle-shaped tube comprises a base tube 14 and cylindrical welding needles 15 uniformly welded on the normal line of the base tube 14.
And gas pulse soot blowers 16 are arranged on the building block type pipe box shell of the vertical = flue and the furnace wall of the horizontal flue between two adjacent economizer modules.
An ash hopper 17 is arranged at the bottom end of the horizontal tunnel kiln type structure flue, and an automatic ash discharging device 18 is arranged at an ash discharging port of the ash hopper 17.
Flue gas flow: flue gas from a flue gas pipeline of the ferroalloy submerged arc furnace enters the L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler from the flue gas inlet 4, the flue gas sequentially flushes the water protection section 6, the steam superheater 7, the evaporator 8 and the economizer 9 in the L-shaped flue 1, and after complete sufficient heat exchange, the flue gas is discharged through the flue gas outlet 5 and then returns to the original ferroalloy submerged arc furnace flue gas process system. The dust carried in the flue gas falls into an ash hopper 17 in the process of flowing through the coal economizer 9 and is discharged out of the furnace through an automatic ash discharging device 18.
Steam-water flow: the method comprises the following steps that feedwater from a water supply pipe network is heated by an economizer 9 and then is sent into a steam pocket 10, a steam-water natural circulation loop is constructed by a water protection section 6, an evaporator 8 and the steam pocket 10 through an eduction pipe 11 and a downcomer 12, saturated steam generated in the steam pocket 10 is further heated by a steam superheater 7 to generate superheated steam under rated pressure and temperature, and the superheated steam is merged into a plant area pipe network.
The preferred embodiments of the present invention described above with reference to the drawings are only for illustrating the embodiments of the present invention, and are not to be considered as limiting the objects of the present invention and the contents and scope of the appended claims, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still belong to the technical and claim protection scope of the present invention.

Claims (9)

1. The utility model provides a hot stove flue gas exhaust-heat boiler in L type ferroalloy ore deposit which characterized in that: comprises an L-shaped flue, and a flue gas outlet and a flue gas inlet which are respectively arranged on the L-shaped flue;
the L-shaped flue comprises a vertical flue and a horizontal flue; wherein:
the vertical flue is of a shaft type structure, and a water protection section, a steam superheater and an evaporator are arranged in the vertical flue in sequence according to the flow direction of flue gas;
the horizontal flue is of a horizontal tunnel kiln type structure, and a coal economizer is arranged in the horizontal flue;
the flue gas inlet is arranged at the top end of the vertical flue, the lower end of the vertical flue is communicated with the horizontal flue, and the flue gas outlet is arranged at the tail end of the horizontal flue;
a steam pocket is arranged on one side of the vertical flue; one end of the economizer is communicated with a water supply pipe network, the other end of the economizer is communicated with a steam pocket, a water protection section, the evaporator and the steam pocket form a steam-water natural circulation loop through an eduction pipe and a downcomer, one end of the steam superheater is connected with the steam pocket, and the other end of the steam superheater is connected with the steam pipe network;
the flue gas inlet is communicated with a flue gas pipeline of the submerged arc furnace, and the flue gas outlet is communicated with a flue gas process system of the submerged arc furnace.
2. The L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler as recited in claim 1, wherein: the water protection section, the steam superheater and the evaporator are all of building block type pipe box structures; the modular tube box structure comprises a heat exchange tube group A and a shell, wherein the heat exchange tube group A is vertically suspended in the shell.
3. The L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler as recited in claim 2, wherein: the heat exchange tube group A is arranged in a row, and heat transfer surface tubes of the heat exchange tube group A are needle tubes.
4. The L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler as recited in claim 2, wherein: and a gas pulse soot blower is arranged on the shell.
5. The L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler as recited in claim 1, wherein: the coal economizer is of a building block type module structure and comprises a top cover and a plurality of coal economizer modules; each economizer module comprises a heat exchange tube group B; and all the heat exchange tube groups B are supported and suspended in the horizontal flue through a top cover arranged at the top of the horizontal flue and are distributed on the top cover in a building block manner.
6. The L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler as recited in claim 5, wherein: the heat exchange tube group B is arranged in a row, and heat transfer surface tubes of the heat exchange tube group B are needle tubes.
7. The L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler of claim 3 or 6, which is characterized in that: the needle-shaped pipe comprises a base pipe and cylindrical welding needles which are uniformly welded and fixed on the normal line of the base pipe.
8. The L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler as recited in claim 6, wherein: and the horizontal flue is arranged on a furnace wall between two adjacent groups of economizer modules and is provided with a gas pulse soot blower.
9. The L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler as recited in claim 6, wherein: an ash hopper is arranged at the bottom end of the horizontal flue, and an automatic ash discharging device is arranged at an ash discharging opening of the ash hopper.
CN202023111571.2U 2020-12-22 2020-12-22 L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler Active CN214426448U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023111571.2U CN214426448U (en) 2020-12-22 2020-12-22 L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023111571.2U CN214426448U (en) 2020-12-22 2020-12-22 L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler

Publications (1)

Publication Number Publication Date
CN214426448U true CN214426448U (en) 2021-10-19

Family

ID=78052384

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023111571.2U Active CN214426448U (en) 2020-12-22 2020-12-22 L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler

Country Status (1)

Country Link
CN (1) CN214426448U (en)

Similar Documents

Publication Publication Date Title
CN103644743B (en) Combination system for efficiently using waste heat in iron mine sintering cooling process
CN201218660Y (en) Power generation apparatus by waste heat of sintering production
CN101639211A (en) Float glass melting furnace parallel connection waste heat power generation system
CN203259026U (en) Efficient sintering ore waste heat recovery and electricity generation device with griddle
CN203259024U (en) Efficient sintering ore waste heat recovery and power generation device
CN214426448U (en) L-shaped ferroalloy submerged arc furnace flue gas waste heat boiler
CN102305394A (en) Coking furnace flue-gas waste-heat boiler
CN215113990U (en) Flue gas waste heat boiler of pi-shaped ferroalloy submerged arc furnace
CN214407014U (en) Flue gas waste heat boiler of vertical ferroalloy submerged arc furnace
CN111059546A (en) High-parameter garbage waste heat boiler
CN215113992U (en) Flue gas waste heat boiler of horizontal ferroalloy submerged arc furnace
CN203364124U (en) Pulverized coal boiler modified from chain-grate boiler
CN216049231U (en) Low-temperature waste heat utilization coal-saving power generation device for cement plant
CN203454081U (en) Vertical type carbon waste heat boiler
CN201852070U (en) Flue type shell-and-tube heat exchanger of waste heat boiler
CN202284786U (en) Boiler using waste heat of coking furnace flue gas
CN201636832U (en) Exhaust heat boiler of electric steelmaking furnace
CN209541168U (en) Coal dust organic heat carrier furnace in bulk
CN204404817U (en) Fume afterheat resources shifting with utilize system
CN204514070U (en) A kind of sinter fume waste heat recovery horizontal type waste heat boiler
CN214407013U (en) Steel plant vanadium slag roasting flue gas waste heat boiler
CN202371878U (en) Vertical type coal-burning fluidized bed combustion boiler with waste heat boiler
CN210741136U (en) Boiler device suitable for submerged arc furnace waste heat power generation system
CN212298915U (en) Electric furnace waste heat boiler system
CN202947111U (en) Coking furnace heat pipe waste heat boiler

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant