Bag type dust collector for flue gas treatment of machine head of sintering machine

Abstract

The utility model provides a bag type dust collector for flue gas treatment of a machine head of a sintering machine, which comprises a spark trapping module communicated with a flue gas inlet so as to introduce sintering flue gas and carry out primary spark trapping on the sintering flue gas; the at least one group of cloth bag dust removal module is communicated with the spark trapping module through a dust removal flue and is used for removing dust from the sintering flue gas flowing out of the spark trapping module; a second-stage spark catcher is arranged at a flue gas inlet of the cloth bag dust removal module and is used for carrying out second-stage spark catching on the sintering flue gas; a flue gas outlet of the cloth bag dust removal module is communicated with an after-dust-removal clean flue which is communicated with an after-dust-removal flue gas outlet; the ash removal device comprises a pulse ash removal device and a back-blowing ash removal device which are mutually independently arranged and are respectively communicated with the cloth bag dust removal module; wherein sintering flue gas flowing out of a flue gas outlet after dust removal is adopted by the back-blowing ash removal device as back-blowing gas; and the dust collecting system is communicated with the spark trapping module and the bag-type dust removing module and is used for collecting dust inside the spark trapping module and the bag-type dust removing module.

Description

Technical Field

[0001] The utility model belongs to the field of industrial furnace fume treatment engineering, and specifically relates to a bag type dust collector used for fume treatment of a sintering machine head. Background Art

[0002] At present, most of the dust removal of sintering machine heads adopts electrostatic precipitator, which uses the interaction between the charge of dust particles and the electric field of electrodes to achieve the dust removal effect. Generally, the particle concentration at the outlet of electrostatic precipitator can reach 50mg / m 3 However, with the improvement of national environmental protection standards, the steel industry has comprehensively promoted the ultra-low emission policy, requiring the particle concentration of sintering machine heads to reach 10mg / m 3 Below, electrostatic precipitators can no longer meet the requirements. Bag-type dust collectors, however, can fully meet the requirements of ultra-low emissions by using appropriate filter media and filtering wind speed.

[0003] At present, there are still some problems to be solved when using bag dust collector to treat sintering machine head flue gas. First, the safety problem must be solved. Sintering flue gas may contain some high-temperature particles with sparks or sparks, which may cause perforation of the bag or even catch fire; second, the resistance of the bag dust collector is greater than that of the electrostatic dust collector; third, in order to reduce the resistance of the bag, the bag dust collector needs to be cleaned periodically, which consumes a lot of compressed air, and the compressed air will affect the service life of the bag.

[0004] Chinese patent CN220715156U discloses an explosion-proof bag dust collector, which has an elimination chamber at the connection position between the air inlet pipe and the dust removal box, and a spark eliminator is arranged in the elimination chamber; during the cleaning process of the pulse dust removal device, the protection device sprays low-temperature nitrogen into the dust removal box through a liquid nitrogen storage bottle, a connecting pipe and a protection nozzle, thereby reducing the probability of dust explosion during the cleaning process. However, it only has a first-level spark elimination process, which cannot guarantee a good spark capture effect; it only has a pulse cleaning function, consumes a large amount of compressed air, and affects the service life of the bag.

[0005] Therefore, it is of great practical significance and application value to study how to improve the traditional bag dust collector to meet the requirements of ultra-low emission of flue gas from the sintering machine head. Utility Model Content

[0006] In order to overcome the deficiencies in the prior art, the utility model provides a bag dust collector for sintering machine head flue gas treatment, with a built-in multi-stage spark capture device, which reduces the damage to the bags caused by sparks that may be carried by the flue gas and improves the safety of the device; it adopts a combination of backblowing cleaning and pulse cleaning to save compressed air and extend the service life of the bags.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A bag dust collector for treating flue gas from a sintering machine head, comprising:

[0009] The spark capture module is connected to the flue gas inlet to allow the sintering flue gas to enter and perform primary spark capture on the sintering flue gas;

[0010] At least one group of bag dust removal modules is connected to the spark capture module through the dust removal flue to remove dust from the sintering flue gas flowing out of the spark capture module; and a secondary spark catcher is provided at the flue gas inlet of the bag dust removal module to perform secondary spark capture on the sintering flue gas; the flue gas outlet of the bag dust removal module is connected to the clean flue after dust removal, and the clean flue after dust removal is connected to the flue gas outlet after dust removal;

[0011] The cleaning device comprises a pulse cleaning device and a back-blowing cleaning device which are independently arranged and respectively connected to the bag dust removal module; wherein the back-blowing cleaning device uses the sintering flue gas flowing out of the flue gas outlet after dust removal as back-blowing gas;

[0012] The dust collection system is connected to the spark capture module and the bag dust removal module to collect dust inside the two.

[0013] Furthermore, the spark capture module includes an outer shell and a first-level ash hopper connected to the bottom of the outer shell, the bottom outlet of the first-level ash hopper is connected to the dust collection system, a first-level spark catcher is provided in the outer shell near the flue gas inlet, and a low-resistance guide plate is also provided in the outer shell between the first-level spark catcher and the upper edge of the first-level ash hopper to guide the flue gas.

[0014] Furthermore, the first-stage spark catcher is composed of a plurality of angle steels or steel pipes arranged in multiple layers in a staggered manner.

[0015] Furthermore, the low-resistance guide plate is composed of a plurality of inclined rectangular steel plates arranged longitudinally in sequence.

[0016] Furthermore, the bag-type dust removal module includes a straight dust removal shell and a dust hopper connected to the bottom of the straight dust removal shell, the bottom outlet of the dust hopper is connected to the dust collection system, a number of bag assemblies are fixedly installed in the straight dust removal shell through a flower plate, the dust removal flue includes a connected main flue and branch flue, the main flue is connected to the spark capture module, and the branch flue port is connected to the upper part of the dust removal hopper; a secondary spark catcher is provided at the branch flue port at the internal connecting position of the straight dust removal shell and the dust removal hopper; the top port of the bag assembly is connected to the clean air chamber, and the clean air chamber is connected to the clean flue after dust removal through a lifting valve as a smoke outlet.

[0017] Furthermore, the secondary spark catcher is composed of a number of inclined rectangular steel plates arranged in sequence transversely, each of which is fixedly connected to the inner wall of the dust collection straight section shell and the inner wall of the dust collection hopper shell, and the tops of the steel plates are aligned.

[0018] Furthermore, the steel plates constituting the secondary spark catcher are gradually extended from the inner wall of the dust collecting straight section shell toward the center, and the vertical height of the bottom end of each steel plate extending into the dust collecting ash hopper is less than the height of the branch flue.

[0019] Furthermore, the backblowing cleaning device includes a backblowing flue gas main pipe and a backblowing flue gas branch pipe branched from the backblowing flue gas main pipe and connected to the bag dust removal module accordingly, and a backblowing flue gas cut-off valve is provided on the backblowing flue gas branch pipe; the end of the backblowing flue gas main pipe is connected to the backblowing flue gas inlet interface, and a backblowing flue gas regulating valve is provided near the backblowing flue gas inlet interface.

[0020] Furthermore, the flue gas outlet after dust removal is connected to the sintering main exhaust fan, the sintering main exhaust fan is connected to the flue gas desulfurization and denitrification device, and the flue gas desulfurization and denitrification device is connected to the emission chimney; the back-blowing flue gas inlet interface is connected between the sintering main exhaust fan and the flue gas desulfurization and denitrification device, or between the flue gas desulfurization and denitrification device and the emission chimney, so as to introduce the dust-removed or desulfurization and denitrification purified flue gas into the bag dust removal module for back-blowing cleaning.

[0021] Furthermore, the dust collection system includes an ash conveyor, and air lock valves are provided on the connecting pipes between the ash conveyor and the spark capture module and the bag dust removal module, and a dust collection interface is provided at the end of the ash conveyor.

[0022] The beneficial effects of the utility model include:

[0023] There are two levels of spark capture. When passing through the first-level spark capture module, the spark particles that may exist in the flue gas collide with the multi-layer staggered angle steel or steel pipe, so that the high-temperature large-particle sparks are broken into small particles and cooled down, thereby achieving the purpose of eliminating sparks; when passing through the second-level spark catcher, the upward flue gas is deflected, and the particles that may contain sparks in the flue gas are slowed down and settled by collision, thereby reducing the damage to the bags caused by sparks that may be carried by the flue gas and improving the safety of the device; a combination of backblowing cleaning and pulse cleaning is adopted. During normal operation, backblowing cleaning is mainly used, and the negative pressure generated by the sintering main exhaust fan is used to introduce the flue gas after dust removal or desulfurization and denitrification purification into the bag dust removal module, and the bag components are backblown to achieve cleaning. When the backblowing cleaning effect is not good, or when the time setting reaches the specified value, pulse cleaning is performed, which saves compressed air and extends the service life of the bags.

[0024] In addition, a louver-type low-resistance guide plate is provided, which is composed of several inclined rectangular steel plates arranged longitudinally in sequence. The flue gas passing through the first-level spark catcher moves toward the first-level ash hopper under the guidance of the low-resistance guide plate, which can reduce resistance and prevent particulate matter in the flue gas from taking shortcuts; the several steel plates that make up the second-level spark catcher gradually extend their length from the inner side wall of the dust removal straight section shell to the center direction, which can increase the spark capture effect.

[0025] In summary, the present application improves on the traditional chamber pulse bag dust collector, adds a multi-stage spark removal and guide mechanism, and adds a new back-blowing gas cleaning device, which are integrated into one and can adapt to the application of bag dust collector in the treatment of sintering machine head flue gas, replacing the electrostatic precipitator of sintering machine head flue gas, and achieving the ultra-low emission index requirements for particulate matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the main view of the overall structure of the utility model;

[0027] Figure 2 It is a top view of the overall structure of the utility model;

[0028] Figure 3 yes Figure 1 AA view;

[0029] Figure 4 This is a schematic diagram of the first-stage Mars catcher structure;

[0030] Figure 5 is a schematic diagram of the low-resistance guide plate structure;

[0031] Figure 6 This is a schematic diagram of the second-stage Mars catcher structure.

[0032] In the figure: 2-spark capture module, 3-bag dust removal module, 4-pulse cleaning device, 5-back-blowing cleaning device, 6-dust collection system, 7-dust removal flue, 8-clean flue after dust removal, 101-smoke inlet, 102-smoke outlet after dust removal, 103-compressed air interface, 104-back-blowing flue gas inlet interface, 105-dust collection interface, 201-first-stage spark catcher, 202-low-resistance guide plate, 203-first-stage ash hopper, 301 -clean air chamber, 302-flower plate, 303-dust hopper, 304-secondary spark catcher, 305-dust straight section shell, 306-bag assembly, 401-air bag, 402-pulse solenoid valve, 403-lift valve, 501-back-blowing flue gas main pipe, 502-back-blowing flue gas regulating valve, 503-back-blowing flue gas shut-off valve, 504-back-blowing flue gas branch pipe, 601-air lock valve, 602-ash conveyor, 701-flue duct, 702-air door. DETAILED DESCRIPTION

[0033] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be noted that the terms "lateral", "longitudinal", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0035] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example 1

[0036] A bag dust collector for treating flue gas at the head of a sintering machine mainly comprises: a flue gas inlet 101, a spark capture module 2, one or more groups of bag dust removal modules 3, a pulse dust cleaning device 4, a back-blowing dust cleaning device 5, a dust collection system 6, a dust removal flue 7, a clean flue 8 after dust removal, a flue gas outlet 102 after dust removal, a compressed air interface 103, a back-blowing flue gas inlet interface 104, and a dust collection interface 105. The flue gas outlet 102 after dust removal is connected to the sintering main exhaust fan 801, the sintering main exhaust fan 801 is connected to the flue gas desulfurization and denitrification device 802, and the flue gas desulfurization and denitrification device 802 is connected to the emission chimney 803, so as to further desulfurize and denitrify the flue gas after dust removal.

[0037] refer to Figure 1-Figure 3 , the smoke from the sintering machine head enters the spark capture module 2 from the upper part through the smoke inlet 101. The spark capture module 2 mainly includes a primary spark catcher 201, a low-resistance guide plate 202, a primary ash hopper 203 and an outer shell. The bottom of the outer shell is connected to the primary ash hopper 203, and the bottom outlet of the primary ash hopper 203 is connected to the dust collection system 6. A primary spark catcher 201 is provided in the outer shell near the smoke inlet 101, and a low-resistance guide plate 202 is also provided in the outer shell between the primary spark catcher 201 and the upper edge of the primary ash hopper 203. The primary spark catcher 201 is composed of a plurality of angle steels or steel pipes arranged in multiple layers in a staggered manner, and the number of layers is 2 to 4. Preferably, wear-resistant angle steel is used, and three layers are arranged. The low-resistance guide plate 202 is louver-shaped as a whole, and is composed of a plurality of inclined rectangular steel plates arranged longitudinally in sequence.

[0038] According to the different flue gas treatment capacity, the bag dust removal module 3 can be composed of one or more groups. Figure 1, Figure 2 The bag dust removal modules 3 are arranged in six groups, divided into two columns. The dust removal flue 7 is located in the middle and lower part of the two columns of bag dust removal modules 3, and shares the side panels with the bag dust removal modules 3. The dust removal flue 7 includes a main flue and a branch flue 701 that are connected. The main flue is directly welded to the spark capture module 2. The number of branch flues 701 is the same as the number of bag dust removal modules 3. The branch flues 701 are connected to each bag dust removal module 3, and each branch flue 701 is provided with a damper 702.

[0039] The bag dust removal module 3 mainly includes a clean air chamber 301, a flower plate 302, a dust removal straight section shell 305, a bag assembly 306, a dust removal hopper 303, and a secondary spark catcher 304. The dust removal hopper 303 is connected to the bottom of the dust removal straight section shell 305, and the bottom outlet of the dust removal hopper 303 is connected to the dust collection system 6. A number of bag assemblies 306 are fixedly installed in the dust removal straight section shell 305 through the flower plate 302, and the port of the branch flue 701 is connected to the upper part of the dust removal hopper 303. The internal communication position of the dust removal straight section shell 305 and the dust removal hopper 303 is provided with a secondary spark catcher 304 located at the port of the branch flue 701; the top port of the bag assembly 306 is connected to the clean air chamber 301, and the clean air chambers 301 of each bag dust removal module 3 are isolated from each other, and are respectively connected to the clean flue 8 after dust removal through the lifting valve 403.

[0040] The secondary spark catcher 304 is composed of a plurality of inclined rectangular steel plates arranged in sequence and transversely, each of which is fixedly connected to the inner wall of the dust collecting straight section shell 305 and the inner wall of the dust collecting ash hopper 303, and the tops of the steel plates are aligned. The steel plates constituting the secondary spark catcher 304 are gradually extended from the inner wall of the dust collecting straight section shell 305 to the center direction, and the vertical height of the bottom end of each steel plate extending into the dust collecting ash hopper 303 is less than the height of the branch flue 701.

[0041] The cleaning method is a combination of pulse cleaning and back-blowing cleaning:

[0042] The pulse dust cleaning device 4 is a conventional pulse dust cleaning device, which mainly includes a compressed air interface 103, an air bag 401, a pulse solenoid valve 402 and related pipelines. The compressed air interface 103 is connected to the air bag 401, the air bag 401 is connected to the pulse air pipeline, the pulse air pipeline is correspondingly connected to the clean air chamber 301 of each bag dust removal module 3, and a pulse solenoid valve 402 is provided on the pulse air pipeline.

[0043] The back-blowing ash removal device 5 comprises a back-blowing smoke inlet interface 104, a back-blowing smoke main pipe 501, a back-blowing smoke regulating valve 502, a back-blowing smoke branch pipe 504, and a back-blowing smoke shut-off valve 503. The back-blowing smoke branch pipe 504 is separated from the back-blowing smoke main pipe 501, connected to the back-blowing smoke shut-off valve 503, and then connected to the corresponding clean air chamber 301. The end of the back-blowing smoke main pipe 501 is connected to the back-blowing smoke inlet interface 104, and a back-blowing smoke regulating valve 502 is provided near the back-blowing smoke inlet interface 104.

[0044] There are two gas intake points for back-blowing and cleaning flue gas. Gas intake point a is between the sintering main exhaust fan 801 and the flue gas desulfurization and denitrification device 802; gas intake point b is between the flue gas desulfurization and denitrification device 802 and the emission chimney 803. Preferably, when activated carbon desulfurization and denitrification are used for sintering, gas intake point b is used.

[0045] Based on the above structural settings, the overall working process of this application is as follows:

[0046] The flue gas from the sintering machine head enters the spark capture module 2 of the dust collector through the flue gas inlet 101. The flue gas moves from top to bottom. When passing through the first-level spark catcher 201, the spark particles that may exist in the flue gas collide with the multi-layer staggered angle steel or steel pipe, so that the high-temperature large-particle sparks are broken into small particles and cooled, thereby achieving the purpose of eliminating sparks. The flue gas passing through the first-level spark catcher 201 moves toward the first-level ash hopper 203 under the guidance of the low-resistance guide plate 202. In order to reduce resistance and prevent particles in the flue gas from taking shortcuts, the low-resistance guide plate 202 is designed to be louver-shaped and maintains a certain inclination angle. After colliding with the low-resistance guide plate 202, the particles slide down. The flue gas is bent at the upper part of the first-level ash hopper 203, and the particles that may contain sparks in the flue gas enter the first-level ash hopper 203 and settle under the action of gravity.

[0047] The flue gas after passing through the spark capture module 2 enters the dust removal flue 7, and enters the bag dust removal module 3 through the branch flue 701. The branch flue 701 is provided with a damper 702 for operations such as bag replacement or maintenance without stopping. The flue gas enters the bag dust removal module 3 from the upper part of the dust removal ash hopper 303 through the branch flue 701, and is provided with a secondary spark catcher 304, which is used to guide the flue gas to prevent the flue gas from directly rushing up to the bag, and at the same time deflect the upward flue gas, and slow down and settle the particles that may contain sparks in the flue gas through collision. Preferably, in order to increase the capture effect, the four capture steel plates are gradually extended from the inner side wall of the dust removal straight section shell 305 toward the center; in order to reduce resistance, the width and extension length of the secondary spark catcher 304 are limited.

[0048] Depending on the amount of smoke treatment, the bag dust removal module 3 can be composed of one or more groups. Figure 1 and Figure 2As shown in FIG. 6 , there are 6 groups of bag dust removal modules 3, and the clean air chambers 301 of each group of bag dust removal modules 3 are separated from each other and connected to the clean flue 8 after dust removal through the lifting valve 403. After closing a lifting valve 403, the group of bag dust removal modules 3 can be cleaned offline.

[0049] The cleaning adopts a combination of pulse cleaning and back-blowing cleaning, and is provided with a pulse cleaning device 4 and a back-blowing cleaning device 5. The pulse cleaning device is a traditional pulse jet cleaning. Back-blowing cleaning uses the negative pressure generated by the sintering main exhaust fan 801 to introduce the flue gas purified by dust removal or desulfurization and denitrification into the bag dust removal module 3, and back-blowing the bag assembly 306 to achieve cleaning. In normal operation, back-blowing cleaning is mainly used. When the back-blowing cleaning effect is not good, or when the time setting reaches the specified value, pulse cleaning is performed.

[0050] Two positions can be selected as the back-blowing air intake points for back-blowing cleaning. The air intake point a is between the main exhaust fan 801 and the desulfurization and denitrification device 802, and is mainly used for sintering using a wet desulfurization device; the air intake point b is between the flue gas desulfurization and denitrification device 802 and the emission chimney 803, and is mainly used for sintering using activated carbon desulfurization and denitrification or wet desulfurization and post-denitrification.

[0051] The dust collected by the primary ash hopper 203 and the dust removal ash hopper 303 passes through the dust collection system 6, the air lock valve 601 and the ash conveyor 602, and is discharged from the dust collection interface 105. Example 2

[0052] This embodiment mainly provides the specific structural parameter settings of the first-stage spark catcher 201, the low-resistance guide plate 202, and the second-stage spark catcher 304:

[0053] refer to Figure 4 The first-stage spark catcher 201 is composed of angle steel or steel pipes arranged in a multi-layer staggered arrangement. The horizontal clearance W12 between every two angle steels or steel pipes in each layer is 0.8 to 1.2 times the horizontal projection size W11 of the angle steel or steel pipe. The clearance H12 between every two layers is 1 to 1.2 times the vertical projection size H11 of the angle steel or steel pipe, and the number of layers is 2 to 4.

[0054] refer to Figure 5 The low-resistance guide plate 202 is of louver type, and the louver plate is a rectangular steel plate with a horizontal projection width of W21=300~500mm; the plate spacing H22=200~400mm; the angle between the steel plate and the horizontal plane a2=60~65°; the distance between the lowest steel plate and the upper edge of the first-level ash hopper 303 is H21≥500mm.

[0055] refer to Figure 6The secondary spark catcher 304 is composed of four inclined steel plates, and the angle a3 between the steel plates and the horizontal plane is 60~65°. The tops of the four steel plates are aligned and welded to the dust collection straight section shell 305 and the dust collection hopper 303 shell. From the inner wall of the dust collection straight section shell 305 to the center, the vertical height H32 of the first steel plate extending into the dust collection hopper 303 is ≤1 / 5 of the height H31 of the flue 701, the vertical height H33 of the second steel plate extending into the dust collection hopper 303 is ≤2 / 5 of the height H31 of the flue 701, the vertical height H33 of the third steel plate extending into the dust collection hopper 303 is ≤3 / 5 of the height H31 of the flue 701, and the vertical height H33 of the fourth steel plate extending into the dust collection hopper 303 is ≤4 / 5 of the height H31 of the flue 701. The distance W32 between the edge of the fourth steel plate and the opposite side wall of the dust removal straight section shell 305 is ≥ 1 / 3 of the width W31 of the dust removal straight section shell.

[0056] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A bag filter for treating flue gas from a sintering machine head, characterized in that: include: The spark capture module (2) is connected to the flue gas inlet (101) to allow the sintering flue gas to enter and perform primary spark capture on the sintering flue gas; At least one group of bag dust removal modules (3) is connected to the spark capture module (2) via a dust removal flue (7) to remove dust from the sintering flue gas flowing out of the spark capture module (2); a secondary spark capture device (304) is provided at the flue gas inlet of the bag dust removal module (3) to perform secondary spark capture on the sintering flue gas; the flue gas outlet of the bag dust removal module (3) is connected to the post-dust removal clean flue (8), and the post-dust removal clean flue (8) is connected to the post-dust removal flue gas outlet (102); A dust cleaning device, comprising a pulse dust cleaning device (4) and a back-blowing dust cleaning device (5) which are independently arranged and respectively connected to the bag dust removal module (3); wherein the back-blowing dust cleaning device (5) uses the sintering flue gas flowing out of the dust removal flue gas outlet (102) as back-blowing gas; The dust collection system (6) is connected to the spark capture module (2) and the bag dust removal module (3) to collect dust inside the two modules.

2. The bag filter for treating flue gas from a sintering machine head according to claim 1, characterized in that: The spark capture module (2) comprises an outer shell and a primary ash hopper (203) connected to the bottom of the outer shell, the bottom outlet of the primary ash hopper (203) is connected to the dust collection system (6), a primary spark catcher (201) is provided in the outer shell near the flue gas inlet (101), and a low-resistance guide plate (202) is also provided in the outer shell between the primary spark catcher (201) and the upper edge of the primary ash hopper (203) for guiding the flue gas.

3. The bag filter for treating flue gas from a sintering machine head according to claim 2 is characterized in that: The first-stage spark catcher (201) is composed of a plurality of angle steels or steel pipes arranged in multiple layers in a staggered manner.

4. A bag filter for treating flue gas from a sintering machine head according to claim 2 or 3, characterized in that: The low-resistance guide plate (202) is composed of a plurality of inclined rectangular steel plates which are arranged longitudinally in sequence.

5. The bag filter for treating flue gas from a sintering machine head according to claim 1, characterized in that: The bag dust removal module (3) comprises a dust removal straight section shell (305) and a dust removal hopper (303) connected to the bottom of the dust removal straight section shell (305); the bottom outlet of the dust removal hopper (303) is connected to the dust collection system (6); a plurality of bag assemblies (306) are fixedly installed in the dust removal straight section shell (305) through a flower plate (302); the dust removal flue (7) comprises a main flue and a branch flue (701) connected to each other; the main flue is connected to the spark capture module (6); The block (2) is connected, and the port of the branch flue (701) is connected to the upper part of the dust removal ash hopper (303); a secondary spark catcher (304) located at the port of the branch flue (701) is provided at the internal communication position of the dust removal straight section shell (305) and the dust removal ash hopper (303); the top port of the bag assembly (306) is connected to the clean air chamber (301), and the clean air chamber (301) is connected to the clean flue (8) after dust removal through the lifting valve (403) as a smoke outlet.

6. The bag filter for treating flue gas from a sintering machine head according to claim 5, characterized in that: The secondary spark catcher (304) is composed of a plurality of inclined rectangular steel plates arranged in sequence and transversely, each of the steel plates being fixedly connected to the inner wall of the dust removal straight section shell (305) and the inner wall of the dust removal hopper (303) shell, and the tops of the steel plates are aligned.

7. The bag filter for treating flue gas from a sintering machine head according to claim 6, characterized in that: The steel plates constituting the secondary spark catcher (304) are gradually extended in length from the inner side wall of the dust removal straight section shell (305) toward the center, and the vertical height of the bottom end of each steel plate extending into the dust removal ash hopper (303) is less than the height of the branch flue (701).

8. The bag filter for treating flue gas from a sintering machine head according to claim 1, characterized in that: The back-blowing dust cleaning device (5) comprises a back-blowing smoke main pipe (501) and a back-blowing smoke branch pipe (504) branched from the back-blowing smoke main pipe (501) and connected to the bag dust removal module (3) correspondingly, and a back-blowing smoke shut-off valve (503) is provided on the back-blowing smoke branch pipe (504); the end of the back-blowing smoke main pipe (501) is connected to the back-blowing smoke inlet interface (104), and a back-blowing smoke regulating valve (502) is provided near the back-blowing smoke inlet interface (104).

9. The bag filter for treating flue gas from a sintering machine head according to claim 8, characterized in that: The flue gas outlet (102) after dust removal is connected to the sintering main exhaust fan (801), the sintering main exhaust fan (801) is connected to the flue gas desulfurization and denitrification device (802), and the flue gas desulfurization and denitrification device (802) is connected to the emission chimney (803); the back-blowing flue gas inlet interface (104) is connected between the sintering main exhaust fan (801) and the flue gas desulfurization and denitrification device (802), or between the flue gas desulfurization and denitrification device (802) and the emission chimney (803), so as to introduce the dust-removed or desulfurized and denitrified flue gas into the bag dust removal module (3) for back-blowing and cleaning.

10. The bag filter for treating flue gas from a sintering machine according to claim 1, characterized in that: The dust collection system (6) comprises an ash conveyor (602), and the connecting pipes between the ash conveyor (602) and the spark capture module (2) and the bag dust removal module (3) are all provided with air lock valves (601), and the end of the ash conveyor (602) is provided with a dust collection interface (105).

Images