CN201606868U - Horizontal movable type fire gate gasification furnace - Google Patents
Horizontal movable type fire gate gasification furnace Download PDFInfo
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- CN201606868U CN201606868U CN2010201254182U CN201020125418U CN201606868U CN 201606868 U CN201606868 U CN 201606868U CN 2010201254182 U CN2010201254182 U CN 2010201254182U CN 201020125418 U CN201020125418 U CN 201020125418U CN 201606868 U CN201606868 U CN 201606868U
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- venturi tube
- heater
- fire grate
- boiler
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Abstract
The utility model relates to a horizontal movable type fire gate gasification furnace which comprises a furnace body with a fire gate, and an air supply device formed by a primary air supply pipe and an upper layer air supply pipe; the primary air supply pipe is connected with a plurality of wind chambers and arranged below the fire gate; the upper layer air supply pipe is arranged at both side walls of the furnace body and is communicated with the inner chamber of the furnace body; the rear of the furnace body is provided with an exhaust gas channel; the rear end of the exhaust gas channel is connected with a burner of a boiler; the rear of the burner is connected with a flue gas recirculation pipe which connects the circulated exhaust gas and the upper layer air supply pipe which are lead to a mixed air passage and respectively enter the wind box and the inner chamber of the furnace body with a steam pipe by a primary air venturi pipe and a second air venturi pipe; and mixed gas enters the front side of the boiler burner by an air mixing fan. The furnace has the advantages of being capable of reducing the Ringleman blackness and dust emission, allowing coal raw materials easily to be coked to be used, widening the flexibility of the burner and the diversity of operating mode.
Description
Technical field
The utility model relates to a kind of coal-fired gasification furnace field; Specifically refer to a kind ofly introduce circulating flue gas and subregion control gasification to realize enlarging the horizontal mobile grate gasifier that is suitable for coal scope, minimizing blackness of exhaustion and soot emissions.
Background technology
At present, various industry and civilian gasification furnace are arranged on the domestic and international market, for example Chinese patent application number 200820127031.3 " a kind of inclined coal-fired gasification furnaces " comprise body of heater, furnace bottom and air supply device, and body of heater is made of shell and refractory masses; The top of this body of heater is provided with coal supply apparatus, and the bottom of body of heater is provided with inclined grate, and promptly this body of heater turns forward and tiltedly is installed on the described furnace bottom.
The below of described fire grate is equipped with ajutage one time, the mouth of pipe of this ajutage is near the rear portion of described fire grate, on the top of described body of heater front side wall the secondary blast pipe is installed, the downward-sloping air intake passage that is provided with on this secondary blast pipe and the described body of heater front side wall is communicated with; The bottom of the rear wall of described body of heater is provided with acclivitous gas passage, and this gas passage and described air intake passage all are communicated with the body of heater inner chamber.A described ajutage is communicated with described secondary blast Guan Douyu air supply device.
Above-mentioned " inclined coal-fired gasification furnace " changed horizontal even laminating state in the fuel gasification process, makes the oxidized reduction reaction abundant, is not subjected to intermittently that coal influences, and can make gas continuously, and gas production is higher.
Yet, the weak point of above-mentioned Chinese patent application number 200820127031.3 " a kind of inclined coal-fired gasification furnaces " is not introduce circulating flue gas in a described ajutage and described secondary blast pipe, thus coal scope that influence is suitable for and blackness of exhaustion and the smoke content that improves its discharge.
The utility model content
Technical problem to be solved in the utility model is the situation at prior art, provides a kind of expansion to be suitable for coal and can to improve the blackness of exhaustion of discharge and the horizontal mobile grate gasifier of smoke content.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of horizontal mobile grate gasifier, comprise body of heater, preceding chimney arch and air supply device, this air supply device is made up of air blast and the ajutage that is connected and upper strata ajutage, the bottom of body of heater is provided with the fire grate of belt driver, a described ajutage is connected with a plurality of air compartments and is arranged in the below of this fire grate, described upper strata ajutage is arranged in the top of this fire grate, and this upper strata ajutage is arranged on the two side of described body of heater and is that vaporizer is connected with this body of heater inner chamber; The front side of chimney arch is provided with coal supply apparatus before described, and the rear portion of described body of heater is provided with exhaust gases passes, and the boiler of this exhaust gases passes rear end connecting band burner is characterized in that:
A. described upper boiler is provided with the flue gas recirculation pipe of a band exhaust gas volumn control valve, this flue gas recirculation pipe is communicated with circulating flue gas with mist blower fan by mist blower fan ac variable frequency speed regulation driven by motor, draw into air and circulating flue gas mixed-gas channel, the mist in this mixed-gas channel inputs to secondary wind Venturi tube and enters the inner chamber of described body of heater; Mist in this mixed-gas channel also was communicated with the steam pipe of the band vaporization adjusting control valve that is used to spray before entering described secondary wind Venturi tube;
B. described mixed-gas channel enters in the air compartment of described fire grate below by a wind Venturi tube again; This mist also was communicated with the steam pipe of the band vaporization adjusting control valve that is used to spray respectively before entering a described wind Venturi tube;
C. a described wind Venturi tube and described secondary wind Venturi tube respectively are set to a plurality of, and this secondary wind Venturi tube is along horizontal arranged in co-axial alignment on the two side of described body of heater, and and a described wind Venturi tube between arrange at interval.
Adopt above introducing circulating flue gas structure, thereby draw into the gasifying agent of air, steam and circulating flue gas, realize the purpose of subregion control gasification; Wherein circulating flue gas can reduce burner hearth and fire grate temperature; Its beneficial effect is to use the coal of those easy cokings as gasified raw material, thereby realizes being suitable for the increase of coal scope; Secondly the circulating flue gas in the flue gas recirculation pipe can obviously reduce the blackness of exhaustion and the smoke content of discharge.
Described fire grate is set to horizontal packaged type fire grate, and this horizontal fire grate is by fire grate operation ac variable frequency speed regulation motor-driven and governing speed.Horizontal fire grate structure advantages of simple, production cost is lower; Can come automation to adjust fuel duty and gasification dosage by the speed of regulating fire grate operation ac variable frequency speed regulation motor, thereby the boiler load gas production be regulated in automation according to the size of boiler load simultaneously.
The air compartment of described body of heater one side is arranged in order in the 1-6 position of arching upward along described forehearth and is set to 6, and this air compartment is connected with described mixed-gas channel; The air compartment of described body of heater opposite side is set to 3 along the 2-4 position that described forehearth arches upward with being arranged in order, this opposite side air compartment is connected with described startup air blast, form described gasification furnace and work the reinforcement air zone of employing, be provided with air control valve between this reinforcement air zone and the described startup air blast.Strengthening air zone helps starting gasification of the present utility model and improves the efficient of gasification.
Described startup air blast is regulated by starting air blast ac variable frequency speed regulation motor-driven and speed, and this startup air blast ac variable frequency speed regulation motor, described mist blower fan ac variable frequency speed regulation motor, described fire grate operation ac variable frequency speed regulation motor are controlled by the PLC of described boiler master chamber.Its effect is to control air blast ac variable frequency speed regulation motor, mixed gas ac variable frequency speed regulation motor, fire grate operation ac variable frequency speed regulation motor respectively with change Boiler Steam output variable by steam flow sensor and PLC program, thereby realizes the maximum energy-saving of boiler operatiopn and the purpose of reduction of discharging; This is to be the control procedure of benchmark with steam output variable.
The last plane of a described wind Venturi tube, described secondary wind Venturi tube setting and described horizontal fire grate is parallel to each other.Its effect is to improve gasification result.
Described exhaust gas volumn control valve, described vaporization adjusting control valve are by PLC control or hand control control.Regulate control by exhaust gas volumn and vaporization,, reach optimum state energy-conservation and that reduce discharging with further change Boiler Steam output variable.
Be provided with the cyclone separator of band lime-ash outlet between described exhaust gases passes and the described boiler-burner.The fire grate bottom is provided with automatic removing and leaks device for coal and explosion-protection equipment, and its effect is stability and the security of guaranteeing the utility model operation.
Be provided with water jacket with the top around the described body of heater, can reduce the use amount of insulation material, to save cost; Simultaneously, the steam of generation can reuse as gasifying agent.
A described wind Venturi tube front end and secondary wind Venturi tube front end also are communicated with the compressed air hose that is used to spray, and this compressed air hose and described steam pipe are connected in parallel.Its effect is to be infiltrated by this compressed air further to strengthen gasification function of the present utility model and operating efficiency in the gasifying agent.
The utility model compared with prior art, its advantage is; Obviously lingemann blackness and the soot emissions that reduce are to improve the protection to environment; It two is to have reduced burner hearth and fire grate temperature, helps preventing the fire grate sintering and prolongs service life of equipment; It three is the coal raw materials that allow to use easy coking, thereby has enlarged the scope of application and widened flexibility that boiler uses and the diversity of the method for operation; It four is because the coal gasification temperature is lower than ignition temperature, oozes to add lime stone and can solve because of the low problem of the higher desulfuration efficiency of ignition temperature in coal, thereby can reduce the discharging of SO2 greatly.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the B-B cutaway view of Fig. 1;
Fig. 4 is the utility model control procedure schematic diagram;
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Fig. 1 to Fig. 4 illustrates an embodiment of the present utility model, comprises body of heater 6, preceding chimney arch 3 and air supply device, is provided with water jacket 13 with the top around the body of heater, and this water jacket can reduce the use amount of insulation material, to save cost; Simultaneously, the steam that produces of this water jacket can reuse as gasifying agent.
Air supply device is made up of with the upper strata ajutage air blast 5 and an ajutage being connected 18; The bottom of body of heater 6 is provided with the fire grate 14 of belt driver, ajutage 18 is connected with a plurality of air compartments 19 and is arranged in the below of this fire grate, the upper strata ajutage is arranged in the top of this fire grate, and this upper strata ajutage is arranged on the two side of body of heater 6 and is that vaporizer is communicated with the body of heater inner chamber; The front side of preceding chimney arch 3 is provided with coal supply apparatus 2, and the rear portion of body of heater is provided with exhaust gases passes 12, is provided with the cyclone separator 11 of band lime-ash outlet 17 between exhaust gases passes 12 and the boiler 10.The boiler 10 of cyclone separator 11 rear end connecting band burners.
The function of air blast 5 is to enable when lighting a fire for blow-on, to have certain oxygen amount during the blow-on igniting, gasification furnace is started, and gasification furnace startup back produces a certain amount of steam by furnace water jacket and air, circulating flue gas form gasifying agent and send into gasification furnace by a wind Venturi tube 97 with secondary wind Venturi tube 94 respectively.
Upper boiler is provided with the flue gas recirculation pipe 9 of a band exhaust gas volumn control valve 98, this flue gas recirculation pipe is communicated with circulating flue gas with the mist blower fan 90 that is driven by mist blower fan ac variable frequency speed regulation motor 91, draw into air and circulating flue gas mixed-gas channel 93, mist in this mixed-gas channel inputs to secondary wind Venturi tube 94 and enters the inner chamber of body of heater, forms the upper strata ajutage; Mist in this mixed-gas channel also was communicated with the steam pipe 95 of the band vaporization adjusting control valve 99 that is used to spray and gasifies before entering secondary wind Venturi tube;
The ratio of air and fuel can be controlled amount of circulating gas by the exhaust gas volumn control valve 98 of flue gas recirculation pipe 9, thereby control enters the oxygen amount in the described gasification furnace; To realize best gasification operating mode.
Circulating flue gas control valve 98 can manually it be regulated amount of circulating gas, regulating by controlling automatically from boiler master controller PLC.This circulating flue gas can also be coordinated the air output from the mist blower fan that burns and need simultaneously.
Mist in the mixed-gas channel also was communicated with the steam pipe 95 and compressed air hose 96 that is used to spray respectively before entering secondary wind Venturi tube 94; Adopt circulating flue gas to sneak into gasifying agent, thereby draw into the gasifying agent of air, steam and circulating flue gas, realize the purpose of subregion control gasification; Wherein circulating flue gas can reduce burner hearth and fire grate temperature; The coal that can use those easy cokings is as gasified raw material, to be suitable for the increase of coal scope.
Mixing gas blower fan 90 enters combustion air between cyclone separator 11 and the boiler 10 again; Enter boiler in order to improve the smoke combustion temperature.
Mixed-gas channel enters in the air compartment 19 of fire grate below jointly by wind Venturi tube 97 and steam in the steam pipe 95 again; This mist also can in parallel be communicated with the compressed air hose 96 that is used to spray respectively before entering a wind Venturi tube 97; To promote gasification result.
One time wind Venturi tube 97 is set to 6, secondary wind Venturi tube 94 respectively is set to 5 along the body of heater both sides, this secondary wind Venturi tube arranges that the horizontal axle base between the both sides of this secondary wind Venturi tube 94 is half of adjacent two axle bases along level on the two side of body of heater between coaxial and wind Venturi tube at interval.Such setting is the effect in order to ensure gasification.
Fire grate is set to drive the also horizontal packaged type fire grate 14 of governing speed by fire grate operation ac variable frequency speed regulation motor 1.
The air compartment 19 of body of heater 6 one sides is arranged in order in the 1-6 position along 3 of preceding chimney arch and is set to 6, and this air compartment 19 is connected with mixed-gas channel 93 by a wind Venturi tube 97.The air compartment 20 of body of heater opposite side is set to 3 along the 2-4 position that forehearth arches upward with being arranged in order, and this opposite side air compartment 20 is connected by the startup air blast 5 with an ajutage 18, works the reinforcement air zone of employing 21 thereby form gasification furnace; Be provided with air control valve 22 between this reinforcement air zone and the startup air blast.Strengthen the efficient that air zone helps to start gasification and improves gasification.
The startup air blast is regulated with speed by starting 51 drivings of air blast ac variable frequency speed regulation motor, and this startup air blast ac variable frequency speed regulation motor 51, mist blower fan ac variable frequency speed regulation motor 91, fire grate operation ac variable frequency speed regulation motor 1 are controlled by the PLC31 of described boiler master chamber.
One time wind Venturi tube, the layout of secondary wind Venturi tube and the last plane of horizontal fire grate are parallel to each other.
Be provided with steam flow sensor 30 in the boiler, this steam flow sensor is controlled by PLC.
The utility model running is such: bunker coal enters portable traveling-grate stoker 14 from the coal supply apparatus 2 of front end, is moved by fire grate operation ac variable frequency speed regulation motor 1 drive fire grate coal is sent in the body of heater 6, and the stove layer thickness is regulated by slag trap; Coal on the fire grate carries out along the journey gasification reaction with the gas, the steam that are mixed with circulating flue gas by air that fire grate below air compartment is come; Being provided with on fire grate top simultaneously is connected with air blast 5 strengthens air zone 21; Air/the circulating flue gas of high-speed jet/steam mixture enters and forms flow-disturbing in the body of heater, strengthens the rear portion and mixes, to improve the conversion ratio of carbon.Slag through gasification after, fall by slag notch 16 from the operation end of fire grate, and high-temperature ash is discharged behind the cooling pond from the conveying worm of bottom.In order to prevent that the gas leak bottom of furnace body from adopting watertight construction.The coal gas that generates is discharged from the flue 12 of body of heater one side, through entering boiler 10 burnings after cyclone separator 11 dedustings.
The utility model control procedure is such: steam flow sensor 30 is according to the programme-control of Boiler Steam output variable parameter input PLC, control the unlatching of the speed adjusting that starts air blast ac variable frequency speed regulation motor, mist blower fan ac variable frequency speed regulation motor, fire grate operation ac variable frequency speed regulation motor and volume control damper, circulating flue gas control valve respectively regulates by the PLC program, adapting to and to change combustion conditions of the present utility model, the Boiler Steam output variable of this changes after-combustion operating mode generation is controlled again and is fed back the steam energy sensor; The On-line Control process of the automation that this boiler load continues, thus realize the maximum energy-saving of boiler operatiopn and the purpose of reduction of discharging.This is to be the control procedure of benchmark with steam output variable.
The specific heat of the circulating flue gas in the flue gas recirculation pipe of the present utility model is big than air, so it can take away more heat transfer from burner hearth, can significantly reduce the combustion temperature in hearth peak value, can cool off red-hot fire box temperature and reduce the fire grate temperature; Thereby the coal that can use those easy cokings is as gasified raw material, to enlarge suitable coal scope; Circulating flue gas in the utility model flue gas recirculation pipe can obviously reduce the blackness of exhaustion and the smoke content of discharge again.
Claims (10)
1. horizontal mobile grate gasifier, comprise body of heater, preceding chimney arch and air supply device, this air supply device is made up of air blast and the ajutage that is connected and upper strata ajutage, the bottom of body of heater is provided with the fire grate of belt driver, a described ajutage is connected with a plurality of air compartments and is arranged in the below of this fire grate, described upper strata ajutage is arranged in the top of this fire grate, and this upper strata ajutage is arranged on the two side of described body of heater and is that vaporizer is connected with this body of heater inner chamber; The front side of chimney arch is provided with coal supply apparatus before described, and the rear portion of described body of heater is provided with exhaust gases passes, and the boiler of this exhaust gases passes rear end connecting band burner is characterized in that:
A. described boiler (10) top is provided with the flue gas recirculation pipe (9) of a band exhaust gas volumn control valve (98), this flue gas recirculation pipe (9) is communicated with circulating flue gas with the mist blower fan (90) that is driven by mist blower fan ac variable frequency speed regulation motor (91), draw into air and circulating flue gas mixed-gas channel (93), the mist in this mixed-gas channel (93) inputs to secondary wind Venturi tube (94) and enters the inner chamber of described body of heater (6); Mist in this mixed-gas channel (93) is entering the steam pipe (95) that described secondary wind Venturi tube (94) also is communicated with the band vaporization adjusting control valve (99) that is used to spray before;
B. described mixed-gas channel (93) enters in the air compartment (19) of described fire grate below by a wind Venturi tube (97) again; This mist is entering the steam pipe (95) that a described wind Venturi tube (97) also is communicated with the band vaporization adjusting control valve (99) that is used to spray before respectively;
C. a described wind Venturi tube (97) respectively is set to a plurality of with described secondary wind Venturi tube (94), this secondary wind Venturi tube (94) is along horizontal arranged in co-axial alignment on the two side of described body of heater (6), and and a described wind Venturi tube (97) between arrange at interval.
2. horizontal mobile grate gasifier according to claim 1 is characterized in that: described fire grate is set to horizontal packaged type fire grate (14), and this horizontal fire grate (14) is driven and governing speed by fire grate operation frequency control motor (1).
3. horizontal mobile grate gasifier according to claim 1, it is characterized in that: described body of heater crosswind chambers (19) (6) are arranged in order in the 1-6 position that chimney arch (3) before described rises and are set to 6, and this air compartment (19) is connected with described mixed-gas channel (93); Described body of heater (6) opposite side air compartment (20) is set to 3 along the 2-4 position that described preceding chimney arch (3) rises with being arranged in order, this opposite side air compartment (20) is connected with described startup air blast (5), form described gasification furnace and work the reinforcement air zone of employing (21), be provided with air control valve (22) between this reinforcement air zone (21) and the described startup air blast (5).
4. horizontal mobile grate gasifier according to claim 1 and 2, it is characterized in that: described startup air blast (5) is regulated with speed by starting air blast ac variable frequency speed regulation motor (51) driving, and this startup air blast ac variable frequency speed regulation motor (51), described mist blower fan ac variable frequency speed regulation motor (91), described fire grate operation ac variable frequency speed regulation motor (1) are controlled by the PLC (31) of described boiler master chamber.
5. horizontal mobile grate gasifier according to claim 1 and 2 is characterized in that: a described wind Venturi tube (97), described secondary wind Venturi tube (94) are provided with and the last plane of described horizontal fire grate (14) is parallel to each other.
6. horizontal mobile grate gasifier according to claim 4 is characterized in that: described boiler (10) is provided with steam flow sensor (30), and this steam flow sensor (30) is by described PLC (31) control.
7. horizontal mobile grate gasifier according to claim 4 is characterized in that: described exhaust gas volumn control valve (98), described vaporization adjusting control valve (99) are by PLC control or hand control control.
8. horizontal mobile grate gasifier according to claim 1 is characterized in that: be provided with cyclone separator (11) between described exhaust gases passes (12) and the described boiler (10).
9. horizontal mobile grate gasifier according to claim 1 is characterized in that: a described wind Venturi tube (97) front end, described secondary wind Venturi tube (94) front end also are communicated with the compressed air hose (96) that is used to spray; This compressed air hose (96) is connected in parallel with described steam pipe (95).
10. horizontal mobile grate gasifier according to claim 1 is characterized in that: described body of heater (6) is provided with water jacket (13) with the top on every side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201254182U CN201606868U (en) | 2010-03-05 | 2010-03-05 | Horizontal movable type fire gate gasification furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201254182U CN201606868U (en) | 2010-03-05 | 2010-03-05 | Horizontal movable type fire gate gasification furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201606868U true CN201606868U (en) | 2010-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201254182U Expired - Lifetime CN201606868U (en) | 2010-03-05 | 2010-03-05 | Horizontal movable type fire gate gasification furnace |
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| Country | Link |
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| CN (1) | CN201606868U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776260A (en) * | 2010-03-05 | 2010-07-14 | 宁波怡诺能源科技有限公司 | Horizontal mobile grate gasifier |
-
2010
- 2010-03-05 CN CN2010201254182U patent/CN201606868U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776260A (en) * | 2010-03-05 | 2010-07-14 | 宁波怡诺能源科技有限公司 | Horizontal mobile grate gasifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101013 Effective date of abandoning: 20110810 |