CN101893385A - Device for power generation from waste heat of metallic silicon smelting electric furnace and process flow thereof - Google Patents
Device for power generation from waste heat of metallic silicon smelting electric furnace and process flow thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of power generation from smelting electric furnace waste heat, more particularly relates to a device for the power generation from waste heat of metallic silicon smelting electric furnace and process flow thereof. The device comprises a high temperature flue, a heat-resisting valve, an air cooler, waste heat boilers, a turbo-generator unit and a flue gas dust removal device, and further comprises an electric furnace hood and a water cooling flue, wherein a channel formed by the electric furnace hood and the water cooling flue is communicated with the high temperature flue, the electric furnace hood and a cooling water pipeline of the water cooling flue are connected with circulating water pipelines of the waste heat boilers and the turbo-generator unit; water for boilers is firstly preheated through the electric furnace hood and the water cooling flue, a plurality of boilers are arranged vertically and parallelly, heat efficiency is enhanced by adjusting or closing single boiler, and the waste heat boilers are provided with a complex ash cleaning system so that the heated surfaces of the boilers are constantly clean, thereby greatly enhancing the utilization rate of waste heat, furthermore, the air cooler is connected with the waste heat boilers in parallel and an outlet is connected with the flue gas dust removal device for removing dust of the flue gas, thereby reducing environmental pollution; the entire waste heat power generation device has reliable operation and simple process flow.
Description
Technical field
The invention belongs to the smelting electric furnace waste heat power generation technical field, particularly relate to a kind of device for power generation from waste heat of metallic silicon smelting electric furnace and technological process.
Background technology
Existing technology power generation from waste heat of metallic silicon smelting electric furnace equipment and technological process, though the waste heat that produces during to the electric furnace smelting metal has carried out collecting and generating utilizes, but it is low to exist utilization rate of waste heat, the shortcoming of equipment failure rate height and power generation stabilization difference, its reason is as follows: one, metallic silicon smelting electric furnace can produce a large amount of high-temperature flue gas when metal smelting silicon, high-temperature flue gas is transported in the waste heat boiler after collecting by electric furnace petticoat pipe and water-cooled flue, the steam that produces in the waste heat boiler is transported to steam turbine generator and generates electricity, but electric furnace petticoat pipe and water-cooled flue need independent recirculating cooling water system, recirculated cooling water is injected the high temperature petticoat pipe to a large amount of utilization of power high-pressure hydraulic pump of needs consumption and flue cools off, the hot water that produces need use the cooling tower cooling so that recycling, cooling water circulation and cooling system investment are big, floor space is big, the production cost height, a large amount of high-temperature flue gas that electric furnace metal smelting silicon produces is not fully utilized, and enters the atmosphere pollution environment; Its two, high-temperature flue gas enters when carrying out heat exchange in the waste heat boiler, because the characteristic of SILICA FUME in the flue gas, a large amount of SILICA FUME dust granules can bond on the heat exchange tube tube wall of waste heat boiler, reduce heat transfer efficiency, and may be because of the overweight pipeline that crushes, thereby the device damage accident caused; Its three, waste heat boiler has carried out insulation in order to obtain high as far as possible inlet flue gas temperature to the electric furnace flue, but cause electric furnace flue work inclement condition, the cigarette temperature is high, and SILICA FUME coheres in the flue, seriously stops up flue, in addition, the fluctuation of exhaust gas volumn and flue-gas temperature is very big during the electric furnace operate as normal, and it is stable to have a strong impact on the waste heat boiler operating mode, causes the steam quality fluctuation big, the steam turbine inefficiency, power generation stabilization is poor.
Summary of the invention
It is low to the objective of the invention is to overcome in the prior art utilization rate of waste heat, environmental pollution is serious, the shortcoming of the high and power generation stabilization difference of equipment failure rate provides a kind of utilization rate of waste heat height, environment protecting is good and the device for power generation from waste heat of metallic silicon smelting electric furnace and the technological process of dependable performance.
For achieving the above object, the present invention is achieved through the following technical solutions:
Device for power generation from waste heat of metallic silicon smelting electric furnace comprises high-temperature flue, heat-resisting valve, air cooler, waste heat boiler, Turbo-generator Set, fume dust remover, its structural feature also comprises electric furnace petticoat pipe and water-cooled flue, they link to each other by the pipeline of water pipe with waste heat boiler and Turbo-generator Set, form the heat exchange loop of a sealing, the passage that electric furnace petticoat pipe and water-cooled flue form is communicated with high-temperature flue, high-temperature flue is connected with waste heat boiler with air cooler respectively, air cooler is in parallel with waste heat boiler, one heat-resisting valve respectively is set before and after the air cooler, establish a heat-resisting valve before the waste heat boiler, waste heat boiler has the combination deashing system, and air cooler links to each other with fume dust remover with waste heat boiler outlet in parallel.
Described device for power generation from waste heat of metallic silicon smelting electric furnace, its waste heat boiler comprises several boilers and combination deashing system, several boilers are vertical to be arranged in parallel, each boiler all has independently vapor collection case, pipeline and gas bag, a certain cover boiler generation problem, other still can move, fluctuation appears in silicon metal furnace flue gas flow and temperature, can take to regulate or close single cover boiler and improve the thermal efficiency, to save huge gas bypass system, guarantee that boiler reaches higher operating thermal efficiency and running rate simultaneously, solved the fluctuation of waste heat boiler output steam quality greatly, the steam turbine inefficiency, the problem of power generation stabilization difference.
The combination deashing system is made of jointly ball blast deashing device and sound wave ash cleaner.
The ball blast deashing device comprises carrier chain, driving mechanism, shot, the changed course sprocket wheel, baffle plate, flashboard hopper and several shot hoppers, several shot hoppers link to each other with carrier chain by certain spacing by hinge, four groups of changed course sprocket wheels lay respectively at four angles of several vertical boiler vertical planes in parallel, carrier chain is installed on four groups of changed course sprocket wheels, and form the ring of a sealing, the same changed course sprocket wheel of driving mechanism links to each other, drive carrier chain according to certain speed and direction running, the top and the bottom of process boiler when several shot hoppers move on carrier chain, baffle plate and flashboard hopper are installed in the top and the bottom of boiler respectively, when lifting, baffle plate stops the shot hopper, make its certain angle that tilts, like this, the operation of drive mechanism carrier chain, driving the shot hopper moves, in the time of directly over the shot hopper of filling shot passes through boiler, baffle plate lifts and stops that the shot hopper makes its certain angle that tilts, shot is sowed and is descended from the boiler flue top, successively by impacting the superheater of boiler, evaporimeter, all convection heating surfaces of economizer, the SILICA FUME particle that deposits on the generating surface is removed major part, the flashboard hopper that falls into boiler bottom behind the shot impact heating surface gathers, when the next empty shot hopper of revolution arrives boiler bottom, the flashboard of flashboard hopper is opened, shot falls into the shot hopper, the hopper of filling shot is transported to the boiler top by carrier chain, shed shot once more, reciprocation cycle like this, the state that the heating surface of boiler internal is kept clean, be beneficial to heat exchange, utilize fume afterheat to greatest extent.
Sound wave ash cleaner comprises power gas source and sonic generator, sonic generator is installed in the boiler, power gas source links to each other with sonic generator, after power gas source enters sonic generator, sonic generator produces the ultrasonic wave of high frequency, wide cut, make the heating surface of boiler internal produce resonance, make and stick to that the SILICA FUME particle comes off because of vibration on the boiler tubing heating surface, simultaneously can not damage boiler, removed the position that shot is difficult to remove, being used in combination of ball blast deashing device and sound wave ash cleaner improved the operating efficiency of removing ash of boiler greatly.
Described device for power generation from waste heat of metallic silicon smelting electric furnace, its fume dust remover comprises the dual stage cyclone deduster, main induced draft fan, the back suction blower fan, the positive-pressure cloth bag deduster, the grader leveling blade machine, conveyer and storage bin, they link to each other successively, the dual stage cyclone deduster links to each other with the exhanst gas outlet of waste heat boiler and the heat-resisting pipeline of air cooler outlet, like this, when the waste heat boiler operate as normal, heat-resisting valve closing before and after the air cooler, the high-temperature flue gas that enters waste heat boiler is through after the heat exchange, become low-temperature flue gas and enter fume dust remover from the exhanst gas outlet of waste heat boiler, under the effect of main induced draft fan and back suction blower fan, dust in the flue gas deposits in dual stage cyclone deduster and positive-pressure cloth bag deduster, through storing at storage bin under the conveying of grader leveling blade machine and conveyer, sell as the metallic silicon smelting byproduct.
Described device for power generation from waste heat of metallic silicon smelting electric furnace, its Turbo-generator Set comprises steam turbine generator, condenser and feed pump, they are connected successively, the steam that waste heat boiler produces is delivered to steam turbine generator and is generated electricity, steam after the generating condenses into water through condenser, water is transported to the electric furnace petticoat pipe and water-cooled flue carries out preheating by feed pump.
Described device for power generation from waste heat of metallic silicon smelting electric furnace; the water inlet of its electric furnace petticoat pipe and water-cooled flue links to each other with the feed pump of Turbo-generator Set by pipeline respectively; delivery port links to each other with the water inlet of waste heat boiler by pipeline respectively; electric furnace petticoat pipe and water-cooled flue are the pipelines that high-temperature flue gas passes through; for reducing the loss of this section flue heat; improve heat utilization ratio; adopt coiled pipe to be coiled into the tube wall of petticoat pipe and flue; condensate water after pipe interior is used by the Turbo-generator Set generating is as cooling water; condensate water is conveyed into waste heat boiler after the heating of electric furnace petticoat pipe and water-cooled flue; electric furnace petticoat pipe and water-cooled flue have promptly been protected; also made full use of waste heat; improve utilization rate of waste heat; it is high to have solved electric furnace flue cigarette temperature simultaneously, and SILICA FUME coheres in the flue, seriously stops up the problem of flue; consider when there is fault in Turbo-generator Set that the electric furnace petticoat pipe and the water-cooled flue of metallic silicon smelting electric furnace should be connected standby recirculating cooling water system.
Described power generation from waste heat of metallic silicon smelting electric furnace technological process:
When the metallic silicon smelting electric furnace initial ignition is produced, should close the preceding heat-resisting valve of waste heat boiler, open the heat-resisting valve in front and back of air cooler, Turbo-generator Set is not generated electricity, high-temperature flue gas from the electric furnace discharge, through the electric furnace petticoat pipe, water-cooled flue and high-temperature flue enter air cooler, cooling through air cooler, high-temperature flue gas becomes low-temperature flue gas, low-temperature flue gas is transported to fume dust remover by pipeline and carries out dedusting, under the effect of main induced draft fan and back suction blower fan, dust in the flue gas deposits in dual stage cyclone deduster and positive-pressure cloth bag deduster, through storing at storage bin under the conveying of grader leveling blade machine and conveyer, sell as the metallic silicon smelting byproduct.
When metallic silicon smelting electric furnace enters normal smelting when producing, close the heat-resisting valve in front and back of air cooler, open the preceding heat-resisting valve of waste heat boiler, high-temperature flue gas from the electric furnace discharge, through the electric furnace petticoat pipe, water-cooled flue and high-temperature flue enter waste heat boiler, high-temperature flue gas carries out heat exchange by the heating surface of waste heat boiler, after being heated, the stove water of waste heat boiler produces superheated steam, superheated steam enters Turbo-generator Set by steam valve and generates electricity, steam after the generating becomes condensed water after cooling off in condenser, condensed water enters electric furnace petticoat pipe and water-cooled flue after pressurizeing by feed pump, carry out first flue gas waste heat recovery, be transported to waste heat boiler through the water of preheating by pipeline at electric furnace petticoat pipe and water-cooled flue, high-temperature flue gas is through making the superheated steam of its generation behind the heating surface of waste heat boiler, being sent to Turbo-generator Set by steam pipework generates electricity, waste heat boiler is equipped with the combination deashing system, be ball blast deashing device and sound wave ash cleaner, under the composite dedusting effect of ball blast deashing device and sound wave ash cleaner, the heating surface of waste heat boiler is in the state of cleaning all the time, improves the heat exchanger effectiveness of waste heat boiler.
In sum, the present invention has the following advantages compared to existing technology: the superheated steam input Turbo-generator Set generating that waste heat boiler produces, condensate water after generating is used is as cooling water, be conveyed into waste heat boiler after being input to the heating in electric furnace petticoat pipe and the water-cooled flue, promptly protected electric furnace petticoat pipe and water-cooled flue, also made full use of waste heat, improve utilization rate of waste heat, it is high to have solved electric furnace flue cigarette temperature simultaneously, and SILICA FUME coheres in the flue, seriously stops up the problem of flue; Waste heat boiler is equipped with the combination deashing system, be ball blast deashing device and sound wave ash cleaner, under the acting in conjunction of ball blast deashing device and sound wave ash cleaner, the heating surface of waste heat boiler is in the state of cleaning all the time, improve heat transfer efficiency, improved the afterheat utilization rate greatly; Several boilers are vertical to be arranged in parallel, a certain cover boiler generation problem, other still can move, fluctuation appears in silicon metal furnace flue gas flow and temperature, can take to regulate or close single cover boiler and improve the thermal efficiency, simultaneously to save huge gas bypass system, guarantee that boiler reaches higher operating thermal efficiency and running rate, it is big to have solved the fluctuation of waste heat boiler output steam quality, the steam turbine inefficiency, the problem of power generation stabilization difference is furnished with fume dust remover in the low-temperature flue gas outlet simultaneously, and the dust in the flue gas is carried out dedusting, collect and store again and utilize, reduced environmental pollution, whole device for generating power by waste heat is simple in structure, reliable operation, and technological process is simple.
Description of drawings
Accompanying drawing is a structural configuration schematic overview of the present invention.
1. electric furnace petticoat pipes, 2. water-cooled flue, 3. high-temperature flue among the figure, 4. heat-resisting valve, 5. air cooler, 6. waste heat boiler, 61. boiler, 62. combination deashing systems, 621. ball blast deashing devices, 6211. carrier chain, 6212. driving mechanisms, 6213. shots, 6214. the changed course sprocket wheel, 6215. baffle plates, 6216. flashboard hoppers, 6217. the shot hopper, 622. sound wave ash cleaners, 6221. power gas sources, 6222. sonic generator, 7. fume dust remover, 71. dual stage cyclone dedusters, 72. main induced draft fan, 73. back suction blower fans, 74. positive-pressure cloth bag dedusters, 75. grader leveling blade machine, 76. conveyer, 77. storage bins, 8. Turbo-generator Set, 81. steam turbine generator, 82. condenser, 83. feed pumps, 9. heat exchange loop.
The specific embodiment
Comprise high-temperature flue 3 with reference to the accompanying drawing device for power generation from waste heat of metallic silicon smelting electric furnace, heat-resisting valve 4, air cooler 5, waste heat boiler 6, Turbo-generator Set 8, fume dust remover 7, its structural feature also comprises: electric furnace petticoat pipe 1 and water-cooled flue 2, they link to each other with the pipeline of waste heat boiler 6 with Turbo-generator Set 8 by water lines, form the heat exchange loop 9 of a sealing, the passage that electric furnace petticoat pipe 1 and water-cooled flue 2 form is communicated with high-temperature flue 3, high-temperature flue 3 is connected with waste heat boiler 6 with air cooler 5 respectively, air cooler 5 is in parallel with waste heat boiler 6, air cooler 5 front and back respectively are provided with a heat-resisting valve 4, establish a heat-resisting valve 4 before the waste heat boiler 6, air cooler 5 links to each other with fume dust remover 7 with the in parallel public outlet of waste heat boiler 6.
Waste heat boiler 6 comprises several boilers 61 and combination deashing system 62, several boiler 61 vertical being arranged in parallel, configuration one cover combination deashing system 62 on several boilers 61, each boiler 61 all has independently vapor collection case, pipeline and gas bag, a certain cover boiler generation problem, other still can move, fluctuation appears in silicon metal furnace flue gas flow and temperature, can take to regulate or close single cover boiler 61 and improve the thermal efficiency, simultaneously to save huge gas bypass system, guarantee that boiler 61 reaches higher operating thermal efficiency and running rate, it is big to have solved the fluctuation of waste heat boiler output steam quality, Turbo-generator Set 8 inefficiencys, the problem of power generation stabilization difference.
Combination deashing system 62 comprises ball blast deashing device 621 and sound wave ash cleaner 622.
Ball blast deashing device 621 is by carrier chain 6211, driving mechanism 6212, shot 6213, changed course sprocket wheel 6214, baffle plate 6215, flashboard hopper 6216 and several shot hoppers 6217 are formed, several shot hoppers 6217 link to each other with carrier chain 6211 by certain spacing by hinge, four groups of changed course sprocket wheels 6214 lay respectively at four angles of several vertical boiler vertical planes in parallel, carrier chain 6211 is installed on four groups of changed course sprocket wheels 6214, and form the ring of a sealing, ring is by the top and the bottom of boiler 61, driving mechanism 6212 same changed course sprocket wheels 6214 link to each other, drive carrier chain 6211 according to certain speed and direction running, the top and the bottom of process boiler 61 when several shot hoppers 6217 move on carrier chain 6211, baffle plate 6215 and flashboard hopper 6216 are installed in the top and the bottom of boiler 61 respectively, when lifting, baffle plate 6215 can stop shot hopper 6217, make its certain angle that tilts, like this, driving mechanism 6212 drives carrier chain 6211 operations, driving shot hopper 6217 moves, in the time of directly over the shot hopper 6217 of filling shot 6213 passes through boilers 61, baffle plate 6215 lifts and stops shot hopper 6217, the certain angle of shot hopper 6217 inclinations, shot 6213 is sowed and is descended from boiler 61 flue tops, successively by impacting the superheater of boiler 61, evaporimeter, all convection heating surfaces of economizer, the SILICA FUME particle that deposits on the generating surface is removed major part, the flashboard hopper 6216 that falls into boiler 61 bottoms behind the shot 6213 impact heating surfaces gathers, when the empty shot hopper 6217 that transfers arrives boiler 61 bottoms, the flashboard of flashboard hopper 6216 is opened, shot 6213 falls into shot hopper 6217, the hopper of filling shot 6213 is transported to boiler 61 tops by carrier chain 6211, shed shot 6213 once more, move in circles like this, the state that the heating surface of boiler 61 inside is kept clean, be beneficial to heat exchange, utilize waste heat to a greater extent.
Sound wave ash cleaner 622 comprises power gas source 6221 and sonic generator 6222, sonic generator 6222 is installed in the boiler 61, power gas source 6221 links to each other with sonic generator 6222, after power gas source 6221 enters sonic generator 6222, sonic generator 6222 produces high frequency, the ultrasonic wave of wide cut, make the heating surface of boiler 61 inside produce resonance, make and stick to that the SILICA FUME particle comes off because of vibration on the boiler 61 pipeline heating surfaces, simultaneously can not damage boiler 61, removed the position that shot 6213 is difficult to remove, the common use of ball blast deashing device 621 and sound wave ash cleaner 622 has improved the operating efficiency of boiler 61 deashings greatly.
Fume dust remover 7 comprises dual stage cyclone deduster 71, main induced draft fan 72, back suction blower fan 73, positive-pressure cloth bag deduster 74, grader leveling blade machine 75, conveyer 76 and storage bin 77, they link to each other successively, dual stage cyclone deduster 71 links to each other with the exhanst gas outlet of waste heat boiler 6 and the heat-resisting pipeline of air cooler 5 outlets, like this, when waste heat boiler 6 operate as normal, the heat-resisting valve 4 of air cooler 5 front and back is closed, the high-temperature flue gas that enters waste heat boiler 6 is through after the heat exchange, become low-temperature flue gas and enter fume dust remover 7 from the exhanst gas outlet of waste heat boiler 6, under the effect of main induced draft fan 72 and back suction blower fan 73, dust in the flue gas is in dual stage cyclone deduster 71 and 74 li depositions of positive-pressure cloth bag deduster, through storing at storage bin 77 under the conveying of grader leveling blade machine 75 and conveyer 76, sell as the metallic silicon smelting byproduct.
Turbo-generator Set 8 comprises steam turbine generator 81, condenser 82, feed pump 83, they are connected successively, the steam that waste heat boiler 6 produces is delivered to steam turbine generator 81 and is generated electricity, steam after the generating condenses into water through condenser 82, by feed pump 83, water is transported to electric furnace petticoat pipe 1 and water-cooled flue 2 carries out preheating.
The water inlet of electric furnace petticoat pipe 1 and water-cooled flue 2 links to each other with the feed pump 83 of Turbo-generator Set 8 by pipeline respectively; delivery port links to each other by the water inlet of pipeline with waste heat boiler 6 respectively; electric furnace petticoat pipe 1 and water-cooled flue 2 are pipelines that high-temperature flue gas passes through; for reducing the loss of this section flue heat; improve heat utilization ratio; adopt coiled pipe to be coiled into the tube wall of petticoat pipe and flue; condensate water after pipe interior is used by Turbo-generator Set 8 generatings is as cooling water; condensate water feeds waste heat boiler 6 after the heating of electric furnace petticoat pipe 1 and water-cooled flue 2; electric furnace petticoat pipe 1 and water-cooled flue 2 have promptly been protected; also make full use of waste heat, improved utilization rate of waste heat.
The power generation from waste heat of metallic silicon smelting electric furnace technological process:
When the metallic silicon smelting electric furnace initial ignition is produced, should close the heat-resisting valve 4 before the waste heat boiler 6, open the heat-resisting valve 4 in front and back of air cooler 5, Turbo-generator Set 8 is not generated electricity, high-temperature flue gas from the electric furnace discharge, through electric furnace petticoat pipe 1, water-cooled flue 2 and high-temperature flue 3 enter air cooler 5, cooling through air cooler 5, high-temperature flue gas becomes low-temperature flue gas, low-temperature flue gas is transported to fume dust remover 7 by pipeline and carries out dedusting, under the effect of main induced draft fan 72 and back suction blower fan 73, dust in the flue gas is in dual stage cyclone deduster 71 and 74 li depositions of positive-pressure cloth bag deduster, through storing at storage bin 77 under the conveying of grader leveling blade machine 75 and conveyer 76, sell as the metallic silicon smelting byproduct.
When metallic silicon smelting electric furnace enters normal smelting when producing, close the heat-resisting valve 4 in front and back of air cooler 5, open the heat-resisting valve 4 before the waste heat boiler 6, high-temperature flue gas from the electric furnace discharge, through electric furnace petticoat pipe 1, water-cooled flue 2 and high-temperature flue 3 enter waste heat boiler 6, high-temperature flue gas carries out heat exchange by the heating surface of waste heat boiler 6, after being heated, the stove water of waste heat boiler 6 produces superheated steam, superheated steam enters Turbo-generator Set 8 and generates electricity, steam after the generating becomes condensate water after cooling off in condenser 82, after feed pump 83 pressurizations, enter electric furnace petticoat pipe 1 and water-cooled flue 2, carry out first flue gas waste heat recovery, water through preheating is transported to waste heat boiler 6 by pipeline, high-temperature flue gas is through making the superheated steam of its generation behind the heating surface of waste heat boiler 6, being sent to Turbo-generator Set 8 by steam pipework generates electricity, waste heat boiler 6 is equipped with combination deashing system 62, be ball blast deashing device 621 and sound wave ash cleaner 622, under the composite dedusting effect of ball blast deashing device 621 and sound wave ash cleaner 622, the heating surface of waste heat boiler 6 is in the state of cleaning all the time, improves the heat exchanger effectiveness of waste heat boiler 6.
It is same as the prior art that the present invention does not state part.
Claims (8)
1. device for power generation from waste heat of metallic silicon smelting electric furnace, comprise high-temperature flue (3), heat-resisting valve (4), air cooler (5), waste heat boiler (6), fume dust remover (7), Turbo-generator Set (8), it is characterized in that, also comprise electric furnace petticoat pipe (1) and water-cooled flue (2), they link to each other with the waterpipe of waste heat boiler (6) with Turbo-generator Set (8) respectively by water lines, form the heat exchange loop (9) of a sealing, the passage that electric furnace petticoat pipe (1) and water-cooled flue (2) form is communicated with high-temperature flue (3), high-temperature flue (3) is connected with waste heat boiler (6) with air cooler (5) respectively, air cooler (5) is in parallel with waste heat boiler (6), one heat-resisting valve (4) respectively is set before and after the air cooler (5), the preceding heat-resisting valve (4) of establishing of waste heat boiler (6), air cooler (5) links to each other with fume dust remover (7) with the flue outlet of waste heat boiler (6).
2. device for power generation from waste heat of metallic silicon smelting electric furnace according to claim 1, it is characterized in that, waste heat boiler (6) comprises several boilers (61) and combination deashing system (62), vertical being arranged in parallel of several boilers (61), each boiler (61) all has independently vapor collection case, pipeline and gas bag, and several boilers (61) are gone up configuration one cover combination deashing system (62).
3. device for power generation from waste heat of metallic silicon smelting electric furnace according to claim 2 is characterized in that, combination deashing system (62) comprises ball blast deashing device (621) and sound wave ash cleaner (622).
4. device for power generation from waste heat of metallic silicon smelting electric furnace according to claim 3, it is characterized in that, ball blast deashing device (621) comprises carrier chain (6211), driving mechanism (6212), shot (6213), changed course sprocket wheel (6214), baffle plate (6215), flashboard hopper (6216) and several shot hoppers (6217), several shot hoppers (6217) link to each other with carrier chain (6211) by certain spacing by hinge, four groups of changed course sprocket wheels (6214) lay respectively at four angles of several vertical boiler in parallel (61) vertical planes, carrier chain (6211) is installed on four groups of changed course sprocket wheels (6214), and form the ring of a sealing, closed-loop is through the top and the bottom of boiler (61), the same changed course sprocket wheel of driving mechanism (6212) (6214) links to each other, the top and the bottom of several shot hoppers (6217) process boiler (61) when carrier chain (6211) is upward mobile, baffle plate (6215) and flashboard hopper (6216) are installed in the top and the bottom of boiler (61) respectively, baffle plate (6215) can stop shot hopper (6217) when lifting, make its certain angle that tilts.
5. device for power generation from waste heat of metallic silicon smelting electric furnace according to claim 3, it is characterized in that, sound wave ash cleaner (622) comprises power gas source (6221) and sonic generator (6222), sonic generator (6222) is installed in the boiler (61), and power gas source (6221) links to each other with sonic generator (6222).
6. device for power generation from waste heat of metallic silicon smelting electric furnace according to claim 1, it is characterized in that, fume dust remover (7) comprises dual stage cyclone deduster (71), main induced draft fan (72), back suction blower fan (73), positive-pressure cloth bag deduster (74), grader leveling blade machine (75), conveyer (76) and storage bin (77), they link to each other successively, and dual stage cyclone deduster (71) links to each other with the exhanst gas outlet of waste heat boiler (6) and the heat-resisting pipeline of air cooler (5) outlet.
7. device for power generation from waste heat of metallic silicon smelting electric furnace according to claim 1, it is characterized in that, Turbo-generator Set (8) comprises steam turbine generator (81), condenser (82) and feed pump (83), they are connected successively, feed pump (83) links to each other with the water inlet of electric furnace petticoat pipe (1) with water-cooled flue (2) by pipeline, and steam turbine generator (81) steam pipe inlet links to each other with the steam pipe outlet of waste heat boiler (6).
8. power generation from waste heat of metallic silicon smelting electric furnace technological process, it is characterized in that, when the metallic silicon smelting electric furnace initial ignition is produced, should close the preceding heat-resisting valve (4) of waste heat boiler (6), open the heat-resisting valves in front and back (4) of air cooler (5), Turbo-generator Set (8) is not generated electricity, high-temperature flue gas from the electric furnace discharge, through electric furnace petticoat pipe (1), water-cooled flue (2) and high-temperature flue (3) enter air cooler (5), cooling through air cooler (5), high-temperature flue gas becomes low-temperature flue gas, low-temperature flue gas is transported to fume dust remover (7) by pipeline and carries out dedusting, under the effect of main induced draft fan (72) and back suction blower fan (73), dust in the flue gas is in dual stage cyclone deduster (71) and positive-pressure cloth bag deduster (74) lining deposition, store at storage bin (77) under the conveying through grader leveling blade machine (75) and conveyer (76), sell as the metallic silicon smelting byproduct, when metallic silicon smelting electric furnace enters normal smelting when producing, close the heat-resisting valves in front and back (4) of air cooler (5), open the preceding heat-resisting valve (4) of waste heat boiler (6), high-temperature flue gas from the electric furnace discharge, through electric furnace petticoat pipe (1), water-cooled flue (2) and high-temperature flue (3) enter waste heat boiler (6), high-temperature flue gas carries out heat exchange by the heating surface of waste heat boiler (6), after being heated, the stove water of waste heat boiler (6) produces superheated steam, superheated steam input steam turbine generator (81) generates electricity, steam after the generating becomes condensate water after cooling off in condenser (82), after feed pump (83) pressurization, enter electric furnace petticoat pipe (1) and water-cooled flue (2), carry out first flue gas waste heat recovery, water through preheating is transported to waste heat boiler (6) by pipeline, make it produce superheated steam behind the heating surface of high-temperature flue gas through waste heat boiler (6), being sent to Turbo-generator Set (8) by steam pipework generates electricity, become low-temperature flue gas after the heat exchange of high-temperature flue gas through waste heat boiler (6), low-temperature flue gas enters fume dust remover (7) and carries out dedusting, waste heat boiler (6) is equipped with combination deashing system (62), it comprises ball blast deashing device (621) and sound wave ash cleaner (622), the driving mechanism (6212) of ball blast deashing device (621) drives carrier chain (6211) operation, driving shot hopper (6217) moves, in the time of directly over the shot hopper (6217) of filling shot (6213) passes through boiler (61), baffle plate (6215) lifts and stops shot hopper (6217), make the certain angle of shot hopper (6217) inclination, shot (6213) is sowed and is descended from boiler (61) flue top, successively by impacting the superheater of boiler (61), evaporimeter, all convection heating surfaces of economizer, the SILICA FUME particle that deposits on the generating surface is removed major part, the flashboard hopper (6216) that falls into boiler (61) bottom behind shot (6213) the impact heating surface gathers, when the next empty shot hopper (6217) of revolution arrives boiler (61) bottom, the flashboard of flashboard hopper (6216) is opened, shot (6213) falls into shot hopper (6217), the hopper of filling shot (6213) is transported to boiler (61) top by carrier chain (6211), shed shot (6213) once more, move in circles like this, simultaneously, the power gas source (6221) of sound wave ash cleaner (622) enters sonic generator (6222), sonic generator (6222) produces high frequency, the ultrasonic wave of wide cut, make the inner heating surface of boiler (61) produce resonance, make and stick to that the SILICA FUME particle comes off because of vibration on boiler (61) the pipeline heating surface, can not damage simultaneously boiler (61), removed the position that shot (6213) is difficult to remove, the common use of ball blast deashing device (621) and sound wave ash cleaner (622), improved the operating efficiency of boiler (61) deashing greatly, made the heating surface of boiler (61) be in the state of cleaning all the time.
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| CN2010101957089A CN101893385A (en) | 2010-06-09 | 2010-06-09 | Device for power generation from waste heat of metallic silicon smelting electric furnace and process flow thereof |
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| CN2010101957089A CN101893385A (en) | 2010-06-09 | 2010-06-09 | Device for power generation from waste heat of metallic silicon smelting electric furnace and process flow thereof |
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| CN106643149A (en) * | 2017-01-18 | 2017-05-10 | 绵阳易简环保科技有限公司 | Multifunctional electric furnace dust removal and afterheat utilization equipment |
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| CN110948397A (en) * | 2019-11-04 | 2020-04-03 | 深圳市能源环保有限公司 | Sand blasting and ash removing method for waste heat boiler heating surface of waste incineration power plant |
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Application publication date: 20101124 |