Smoke exhaust amount adjusting mechanism of sintering flue gas deep purification device

Abstract

The utility model discloses a smoke exhaust amount adjusting mechanism of a sintering smoke deep purification device, and solves the problem of how to keep a boiler hearth in a better combustion state by controlling the flow speed of smoke exhaust. A superheater (6), an economizer (7) and an air preheater (8) are respectively arranged in the tail flue (5), the tail end of the tail flue (5) is connected with a smoke outlet (9), a smoke adjusting device (10) is arranged in the tail flue (5) between the superheater (6) and the economizer (7), the smoke adjusting device (10) is composed of a first center driving shaft (11) and a first turning plate (12), and the first center driving shaft (11) is connected with the first turning plate (12). The first turning plate (12) is movably arranged on the cross section of the tail flue (5), the first center driving shaft (11) is arranged in the center of the first turning plate (12), and the purpose of changing the smoke passing area of the tail flue (5) shielded by the first turning plate is achieved by rotating the first center driving shaft.

Description

Technical Field

[0001] The utility model relates to a sintering fume multi-pollutant cooperative purification device for purifying sintering fume, in particular to a fume exhaust volume regulating mechanism of a sintering fume deep purification device. Background Art

[0002] Existing circulating fluidized bed boilers are generally divided into two types: steam boilers and hot water boilers. The fuel of circulating fluidized bed boilers is coal or other fuels with calorific value. The combustion air in the boiler is generally air, and the oxygen content in the air is about 21%. The flue gas generated in the furnace is discharged through the furnace, separator and tail flue in turn. The medium of the boiler is heat-exchanged with the high-temperature flue gas in the boiler through the economizer, water cooling system and superheater to form high-quality steam or hot water; in the iron smelting plant, the iron ore is first crushed into iron ore powder, mixed evenly with coke, limestone powder, etc., and then fired by a sintering machine to form hot agglomerates for subsequent iron smelting. In this process, the sintering machine will generate a large amount of sintering flue gas, which contains CO, SO2, NO x Toxic and harmful gases such as HCl and dioxins. The traditional process for treating these harmful gases is to add environmental protection equipment, which has the disadvantages of large equipment investment, high use and maintenance costs, and limited elimination of harmful gases. In view of the above situation, the prior art has adopted a technology for treating sintering flue gas with a circulating fluidized bed boiler. This special circulating fluidized bed boiler is also called a sintering flue gas multi-pollutant coordinated purification device. The main principle of the sintering flue gas multi-pollutant coordinated purification device is to replace the air with the sintering flue gas generated in the sintering machine as the combustion-supporting air of the circulating fluidized bed boiler, and through the high temperature environment in the furnace of the circulating fluidized bed boiler and the unique environmental protection advantages of the circulating fluidized bed boiler, the harmful gases in the sintering flue gas are burned and removed, and the steam or hot water generated by the circulating fluidized bed boiler is supplied to other processes in the iron and steel plant, achieving the effect of killing two birds with one stone.

[0003] The general working condition of the sintering flue gas deep purification device is to replace the combustion air with sintering flue gas and convert the water medium in the boiler into steam; but in the operation process of the boiler, there will inevitably be the following three working conditions: the working condition of the circulating fluidized bed using pure sintering flue gas as the combustion air, the working condition of the circulating fluidized bed using sintering flue gas mixed with air as the combustion air, and the working condition of the circulating fluidized bed using only air as the combustion air; because the exhaust volume of the boiler will be significantly different under different working conditions, resulting in obvious differences in the exhaust flow rate of the tail flue. How to control the exhaust flow rate to keep the boiler furnace in a better combustion state has become a problem that needs to be solved in the operation of the sintering flue gas deep purification device. Summary of the invention

[0004] The utility model provides a smoke exhaust volume regulating mechanism for a sintering smoke deep purification device, which solves the technical problem of how to keep the boiler furnace in a better combustion state by controlling the flow rate of the smoke exhaust.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A smoke exhaust volume regulating mechanism for a sintering smoke deep purification device comprises a tail flue of the sintering smoke deep purification device, in which a superheater, an economizer and an air preheater are respectively arranged, a smoke outlet is connected to the end of the tail flue, and a smoke regulating device is arranged in the tail flue between the superheater and the economizer. The smoke regulating device is composed of a first central drive shaft and a first flap, the first flap is movably arranged on the cross section of the tail flue, the first central drive shaft is arranged at the central position of the first flap, and the purpose of changing the smoke passage area of ​​the tail flue shielded by the first flap is achieved by rotating the first central drive shaft.

[0007] On the same cross section in the tail flue between the superheater and the economizer, the first central drive shaft, the second central drive shaft, the third central drive shaft and the fourth central drive shaft are arranged at intervals, the second central drive shaft is connected to the second flap, the third central drive shaft is connected to the third flap, and the fourth central drive shaft is connected to the fourth flap; a first hinge seat is arranged at the front end of the first central drive shaft, a second hinge seat is arranged at the rear end of the first central drive shaft, a third hinge seat is arranged at the front end of the second central drive shaft, a fourth hinge seat is arranged at the front end of the third central drive shaft, and a first hinge seat is arranged at the front end of the third central drive shaft. A fifth hinge seat is arranged at the rear end, and a sixth hinge seat is arranged at the front end of the fourth center drive shaft; a first swing rod is connected between the second hinge seat and the fifth hinge seat, a second swing rod is arranged between the first hinge seat and the third hinge seat, and a third swing rod is connected between the fourth hinge seat and the sixth hinge seat; by rotating the second center drive shaft, the first center drive shaft, the third center drive shaft and the fourth center drive shaft rotate synchronously, so as to synchronously achieve the purpose of changing the smoke passing area of ​​the tail flue covered by the four flaps; a stepping drive motor is mechanically connected to the second center drive shaft, and an electric controller is electrically connected to the stepping drive motor.

[0008] A connecting flue is connected to the upper end of the tail flue, the other end of the connecting flue is connected to the cyclone separator, the upper end of the cyclone separator is connected to the upper end of the furnace, and a returner is connected to the lower end of the cyclone separator, the other end of the returner is connected to the lower end of the furnace.

[0009] The utility model is used in conjunction with an electric controller of a flue gas deep purification device to control the opening of the flap according to the type of combustion-supporting air introduced into the flue gas deep purification device to ensure the stability of the flow velocity of the tail flue under different working conditions, thereby ensuring the high-efficiency operation of the circulating fluidized bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is a schematic diagram of the structure of the synchronous driving connecting rod of the smoke regulating device;

[0012] Figure 3 It is a schematic diagram of the structure of the smoke conditioning device in a top view;

[0013] Figure 4 It is a schematic diagram of the structure of each flap of the smoke regulating device in an open state;

[0014] Figure 5 It is a schematic diagram of the structure of each flap of the smoke regulating device in a closed state. DETAILED DESCRIPTION

[0015] The utility model is described in detail below with reference to the accompanying drawings:

[0016] A smoke exhaust volume regulating mechanism for a sintering smoke deep purification device comprises a tail flue 5 of the sintering smoke deep purification device, in which a superheater 6, an economizer 7 and an air preheater 8 are respectively arranged, a smoke outlet 9 is connected to the end of the tail flue 5, and a smoke regulating device 10 is arranged in the tail flue 5 between the superheater 6 and the economizer 7. The smoke regulating device 10 is composed of a first central driving shaft 11 and a first flap 12, the first flap 12 is movably arranged on the cross section of the tail flue 5, the first central driving shaft 11 is arranged at the central position of the first flap 12, and the purpose of changing the smoke passage area of ​​the tail flue 5 shielded by the first flap 12 is achieved by rotating the first central driving shaft 11.

[0017] On the same cross section of the tail flue 5 between the superheater 6 and the economizer 7, the first central drive shaft 11, the second central drive shaft 15, the third central drive shaft 17 and the fourth central drive shaft 20 are arranged at intervals, the second central drive shaft 15 is connected with the second flap 25, the third central drive shaft 17 is connected with the third flap 26, and the fourth central drive shaft 20 is connected with the fourth flap 27; a first hinge seat 13 is arranged at the front end of the first central drive shaft 11, a second hinge seat 14 is arranged at the rear end of the first central drive shaft 11, a third hinge seat 16 is arranged at the front end of the second central drive shaft 15, a fourth hinge seat 18 is arranged at the front end of the third central drive shaft 17, a fifth hinge seat 19 is arranged at the rear end of the third central drive shaft 17, and a sixth hinge seat 21 is arranged at the front end of the fourth central drive shaft 20; a first swing rod 22 is connected between the second hinge seat 14 and the fifth hinge seat 19, and a first swing rod 22 is arranged at the first hinge seat A second swing rod 23 is arranged between the first hinge seat 13 and the third hinge seat 16, and a third swing rod 24 is connected between the fourth hinge seat 18 and the sixth hinge seat 21; by rotating the second central drive shaft 15, the first central drive shaft 11, the third central drive shaft 17 and the fourth central drive shaft 20 are rotated synchronously, and the synchronous rotation of the active second central drive shaft 15 and the other three driven central drive shafts drives the flaps on the respective central drive shafts to rotate an angle, so as to synchronously achieve the purpose of changing the smoke passage area of ​​the tail flue 5 covered by the four flaps; a stepping drive motor 28 is mechanically connected to the second central drive shaft 15, and an electric controller is electrically connected to the stepping drive motor, which can control the action of the stepping drive motor 28 according to the combustion state of the boiler furnace and the types and working conditions of the primary and secondary air, and change the smoke passage area covering the tail flue 5 through the four flaps, thereby stabilizing the exhaust flow rate of the smoke and making the boiler work in a better working state.

[0018] A connecting flue 4 is connected to the upper end of the tail flue 5, the other end of the connecting flue 4 is connected to the cyclone separator 2, the upper end of the cyclone separator 2 is connected to the upper end of the furnace 1, and a returner 3 is connected to the lower end of the cyclone separator 2, the other end of the returner 3 is connected to the lower end of the furnace 1.

Claims

1. A smoke exhaust volume regulating mechanism for a sintering smoke deep purification device, comprising a tail flue (5) of the sintering smoke deep purification device, wherein a superheater (6), an economizer (7) and an air preheater (8) are arranged in the tail flue (5), and a smoke outlet (9) is connected to the end of the tail flue (5), characterized in that: A flue gas regulating device (10) is provided in the tail flue (5) between the superheater (6) and the economizer (7). The flue gas regulating device (10) is composed of a first central drive shaft (11) and a first flap (12). The first flap (12) is movably arranged on the cross section of the tail flue (5). The first central drive shaft (11) is arranged at the center position of the first flap (12). By rotating the first central drive shaft (11), the purpose of changing the flue gas passing area of ​​the tail flue (5) covered by the first flap (12) is achieved.

2. The exhaust volume regulating mechanism of the sintering fume deep purification device according to claim 1 is characterized in that: A first central drive shaft (11), a second central drive shaft (15), a third central drive shaft (17) and a fourth central drive shaft (20) are arranged at intervals on the same cross section in the tail flue (5) between the superheater (6) and the economizer (7); a second flap (25) is connected to the second central drive shaft (15), a third flap (26) is connected to the third central drive shaft (17), and a fourth flap (27) is connected to the fourth central drive shaft (20); a first hinge seat (13) is arranged at the front end of the first central drive shaft (11), a second hinge seat (14) is arranged at the rear end of the first central drive shaft (11), a third hinge seat (16) is arranged at the front end of the second central drive shaft (15), a fourth hinge seat (18) is arranged at the front end of the third central drive shaft (17), and a fourth hinge seat (29) is arranged at the front end of the third central drive shaft (20). A fifth hinge seat (19) is arranged at the rear end of the hinge shaft (17), and a sixth hinge seat (21) is arranged at the front end of the fourth central drive shaft (20); a first swing rod (22) is connected between the second hinge seat (14) and the fifth hinge seat (19), a second swing rod (23) is arranged between the first hinge seat (13) and the third hinge seat (16), and a third swing rod (24) is connected between the fourth hinge seat (18) and the sixth hinge seat (21); by rotating the second central drive shaft (15), the first central drive shaft (11), the third central drive shaft (17) and the fourth central drive shaft (20) are rotated synchronously, so as to synchronously change the smoke passing area of ​​the rear flue (5) covered by the four flaps; a stepping drive motor (28) is mechanically connected to the second central drive shaft (15), and an electric controller is electrically connected to the stepping drive motor.

3. The exhaust volume regulating mechanism of the sintering fume deep purification device according to claim 2 is characterized in that: A connecting flue (4) is connected to the upper end of the tail flue (5), the other end of the connecting flue (4) is connected to the cyclone separator (2), the upper end of the cyclone separator (2) is connected to the upper end of the furnace (1), and a return device (3) is connected to the lower end of the cyclone separator (2), the other end of the return device (3) is connected to the lower end of the furnace (1).

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