Title of Invention | "A PULSE INVERSE BLOW CLOTH BAG DEDUSTING DEVICE" |
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Abstract | The present relates to a pulse inverse blow cloth bag dedusting device, comprising a plurality of casings, dedusting cloth bag, separator, gas collection tank, level 1 and 2 pulse inverse blow dedusting devices, etc., wherein, the length of the dedusting cloth bag is 8 to 12 m; an end opening of the level 1 inverse blow branch pipe of the level 1 pulse inverse blow system is disposed at the location of the opening of the dedusting cloth bag; an end opening of the level 2 inverse blow branch pipe of the level 2 pulse inverse blow system extends into the dedusting cloth bag. Two levels of the pulse inverse blow dedusting in the dedusting bag can improve highly the dedusting efficiency, increase the efficient filtering area and enhance the dedusting efficiency in individual casing so as to reduce the amount of the casings being used in the whole dedusting system. |
Full Text | Technical field The present invention relates to a cloth bag dedusting device, especially to a pulse inverse blow cloth bag dedusting device generally used for the dry type gas dedusting in blast furnace in the steel industry. Background art The cloth bag dedusting device has been widely used in the gaseous medium dedusting or separating a solid from a gas, especially in the technical field of dry type gas dedusting in blast furnace. In the prior art, the cloth bag dedusting device consists of a casing, dedusting cloth bag, separator, pulse inverse blow device, gas inlet/outlet, cinder bucket, sections of cinder unloading and transporting, etc.. As shown in Fig. 1, the dust gas moves into the casing through the gas inlet, further the dedusting cloth bag after being filtered, and then the clean gas collection pipe and clean gas collection tank unit in the casing, and finally is expelled out of the casing through the clean gas outlet. The pulse inverse blow gas moves into the inverse blow manifold to remove the dust from the cloth bag by way of the pulse inverse blow through the inverse blow branch pipe connected with the opening of the dedusting cloth bag, and the removed dust is expelled out of the casing through the cinder bucket, cinder unloading device and the cinder outlet. Normally, a conventional cloth bag dedusting device is designed to be with the diameter of the casing at 3.5 m, the length of the cloth bag at 6 m with diameter of 130 mm, and 192 cloth bags to be fixed in the casing, according to features of the material used for the cloth bag and the gas as well as the temperature. However, the effective length of the cloth bag cannot be increased because of the limitation of the inverse blow effect of the pulse inverse blow cloth bag system. Moreover, a large amount of dedusting casings need to be used in the dedusting system and occupy a larger space, which result in a high consumption in economy. Contents of the Invention With respect to the shortcomings existed in the prior art, the object of the present invention is to provide a pulse inverse blow multilevel cloth bag dedusting device with high efficiency to satisfy the requirements of a long cloth bag so as to increase the dedusting areas of the cloth bag and the casing for saving space economically. The pulse inverse blow cloth bag dedusting device includes: a plurality of casings forming a whole dedusting system; a separator, disposed in the casing to divide it into two parts and the upper part is used as a gas collection unit; a gas collection tank unit, collecting the dust gas having been cleaned in the cloth bag dedusting device and the cleaned gas is expelled through the cleaned gas outlet; a dedusting cloth bag at length of at least 8 m for blowing the dust adhered thereon; a level 1 pulse inverse blow cloth bag system and a level 2 pulse inverse blow cloth bag system; an inlet of dust gas, disposed at the lower part of the casing; a clean gas outlet, disposed on the upper part of the gas collection tank in the casing. The level 1 pulse inverse blow cloth bag system includes a level 1 inverse blow gas inlet, a level 1 inverse blow manifold and a level 1 inverse blow branch pipe. The level 2 pulse inverse blow cloth bag system includes a level 2 inverse blow manifold and a level 2 inverse blow branch pipe. The end opening of the level 1 pulse inverse blow branch pipe extends toward the opening of the dedusting cloth bag. The level 2 pulse inverse blow branch pipe extends into the dedusting cloth bag through the level 1 inverse blow manifold and the level 1 inverse blow branch pipe, and the extension depth is 1/2 of the length of the dedusting cloth bag. Moreover, the level 2 inverse blow manifold is concentric with the level 1 inverse blow branch pipe. In addition, a level three or up pulse inverse blow system can be established according to the length of the cloth bag, and the total length of the level 2 or up inverse blow branch pipe is a multiple of 6m respectively. The level 2 inverse blow branch pipe consists of a plurality of sections communicated with each other by a union swivel, and each section is 1-2 m long. Said two level inverse blow points are fixed at the inlet of the dedusting cloth bag and in the middle of the bag respectively, i.e., each level inverse blow point is located on the upper part of each level: level 1 inverse blow point is at the inlet of the bag and the level 2 inverse blow point is fixed in the middle of the bag. Both level 1 and 2 systems first carry out a level 1 inverse blow and then a level 2 inverse blow, or level 2 first then level 1. The two ways can be implemented slightly overlapped. The present invention can efficiently increase the dedusting area and the length of the dedusting cloth bag, thereby enhancing the efficiency of dedusting in individual casing. Description of drawings Fig. 1 is a constructional drawing showing a conventional cloth bag dedusting device; Fig. 2 is a constructional drawing showing a casing of a pulse inverse blow cloth bag dedusting device according to the present invention; Fig. 3 shows an enlarged part 1 of Fig. 2; Fig. 4 shows an enlarged part II of Fig. 2; Fig. 5 shows an enlarged part III of Fig. 2. 1. level 2 inverse blow manifold 2. level 2 inverse blow branch pipe 3. level 1 inverse blow manifold 4. level 1 inverse blow branch pipe 5. separator 6. dedusting cloth bag 7. support framework 8. threaded union swivel 9. casing of the cloth bag dedusting device 10. gas collection tvank 11. level 2 inverse blow pipe inlet 12. level 1 inverse blow pipe inlet 13. upper flange and flange cover 14. upper stub pipe 15. lower stub pipe 16. lower flange 17. bushing flange 18. bushing 19. inlet of dust gas 20. outlet of clean gas Mode of carrying out the invention A detailed description of the present invention is provided along with the drawings as follows. In one embodiment of the constructional drawing of the present invention as shown in Figs. 2-4, the pulse inverse blow cloth bag dedusting device comprises: casing 9, separator 5, dedusting cloth bag 6, support framework 7, gas collection tank 10, a level 1 inverse blow system, a level 2 inverse blow system, inlet 19 of dust gas and outlet 20 of clean gas, etc.. The level 1 inverse blow system consists of level 1 inverse blow inlet 12, level 1 inverse blow manifold 3 and level 1 inverse blow branch pipe 4. The level 2 inverse blow system consists of level 2 inverse blow inlet 11, level 2 inverse blow manifold 1 and level 2 inverse blow branch pipe 2. Level 2 inverse blow branch pipe 2 extends into the dedusting cloth bag through level 1 inverse blow manifold 3 and level 1 inverse blow branch 4, and the extension depth is 1/2 of the length of the dedusting cloth bag. Meanwhile, level 2 inverse blow branch pipe 2 is concentric with level 1 inverse blow branch pipe 4. Level 2 inverse blow branch 2 consists of a plurality of sections communicated with each other by a union swivel, and each section is 1-2 m long. Level 2 inverse blow 2 communicates with level 2 inverse blow manifold 1 via lower flange 16 which corresponds to upper flange and cover flange 13. Level 2 inverse blow branch pipe 2 can be drawn out via level 2 inverse blow manifold 1, lower stub pipe 15 and upper stub pipe 14 by tearing out threaded union swivel 8 on level 2 inverse blow branch 2, and opening lower flange 16, upper flange and cover flange 13 and bushing flange 17, when examining and repairing the device. The level 1 inverse blow pipe inlet is disposed in casing 9 of the cloth bag dedusting device to connect with level 1 inverse blow manifold 3 via flange, and the level 2 inverse blow pipe inlet is also disposed in casing 9 of the cloth bag dedusting device to connect with level 2 inverse blow manifold 1 via flange so as to easily dismantle level 1 inverse blow manifold 3 and level 2 inverse blow manifold 1 from casing 9 of the cloth bag dedusting device. Level 2 inverse blow branch pipe 2 is installed to pass through level 1 inverse blow manifold 3 as well as bushing 18 and bushing flange 17. Meanwhile, bushing 18 and bushing flange 17 are disposed on the upper part of level 1 inverse blow manifold 3. After the installation is completed, bushing flange 17 and level 2 inverse blow branch pipe 2 are well welded to be airproof. Steps of dedusting gas: the dust gas moves into casing 9 of the cloth bag dedusting device through inlet 19 of the dust gas, further gas collection tank 10 after dust is filtered in dedusting cloth bag 6, and finally the clean gas manifold through outlet 20 of the clean gas. The length of each dedusting cloth bag 6 in casing 9 of the cloth bag dedusting device is 8-12 m. Each dedusting cloth bag 6 in casing 9 of the cloth bag dedusting device is cleaned by way of two levels of pulse inverse blow, and the inverse blow points of the two levels of inverse blow system in dedusting cloth bag 6 are disposed at the entrance and in the middle of the bag respectively, i.e., each inverse blow point is located on upper part of each level: the inverse blow point of level 1 inverse blow system is at the entrance of the bag and the inverse blow point of the level 2 inverse blow system is in the middle of the bag. When the pulse inverse blow cloth bag carries out the dedusting, in addition to operate simultaneously the two systems, the preferred step is to implement level 1 inverse blow first and then level 2 inverse blow, or vice versa, and the two inverse blow operations can be slightly overlapped. The present invention is not limited to the models mentioned above and various modifications on the mode are possible, e.g., properly increasing the length of the dedusting cloth bag and constructing a level 3 or up of pulse inverse blow system based on the principle of two levels of pulse inverse blow. Numeral list 1. level 2 inverse blow manifold 2. level 2 inverse blow branch pipe 3. level 1 inverse blow manifold 4. level 1 inverse blow branch pipe 5. separator 6. dedusting cloth bag 7. support framework 8. threaded union swivel 9. casing of the cloth bag dedusting device 10. gas collection tank 11. level 2 inverse blow pipe inlet 12. level 1 inverse blow pipe inlet 13. upper flange and flange cover 14. upper stub pipe 15. lower stub pipe 16. lower flange 17. bushing flange 18. bushing 19. inlet of dust gas 20. outlet of clean gas 10 We Claim: 1. A pulse inverse blow cloth bag dedusting device, comprising: a casing (9); a separator (9, disposed in the casing (9), dividing said casing (9) into two parts and the upper part is used as a gas collection unit (10); a dedusting cloth bag (6) disposed in the casing (9); an inlet (19) of dust gas, disposed at the lower part of the casing (9); an outlet (20) of clean gas, disposed on the upper part of the casing (9); a level 1 pulse inverse blow cloth bag system; characterized in that said dedusting cloth bag (6) is at least 8 m long; and a level 2 pulse inverse blow cloth bag system is also disposed therein, the level 2 pulse inverse blow cloth bag system comprising: a level 2 inverse blow manifold (1) and a level 2 inverse blow branch pipe (2) having a inverse blow end opening extending into the dedusting cloth bag (6), and said level 1 pulse inverse blow cloth bag system comprises a level 1 inverse blow manifold (3) and a level 1 inverse blow branch pipe (4), the level 2 inverse blow branch pipe (2) extends into the cloth bag (6) via the level 1 inverse blow manifold (3) and the level 1 inverse blow branch pipe (4), and the extension depth is 112 of the length of the dedusting cloth bag (6); the level 2 inverse blow branch pipe (2) is concentric with level 1 inverse blow branch pipe (4), said level 2 inverse blow branch pipe (4) consists of a plurality of sections communicated with each other by a union swivel@), and each section is 1-2 m long. 2. The pulse inverse blow cloth bag dedusting device of claim 1, wherein a level three or up pulse inverse blow dedusting system can be disposed therein. |
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Patent Number | 259026 | |||||||||||||||||||||
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Indian Patent Application Number | 1079/DELNP/2007 | |||||||||||||||||||||
PG Journal Number | 09/2014 | |||||||||||||||||||||
Publication Date | 28-Feb-2014 | |||||||||||||||||||||
Grant Date | 21-Feb-2014 | |||||||||||||||||||||
Date of Filing | 08-Feb-2007 | |||||||||||||||||||||
Name of Patentee | SHANDONG PROVINCE METALLURGICAL ENGINEERING CO., LTD | |||||||||||||||||||||
Applicant Address | NO. 134, LISHAN RD. LIXIA DISTRICT, JINAN, SHANDONG PROVINCE, CHINA 250014 | |||||||||||||||||||||
Inventors:
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PCT International Classification Number | B01D 46/02 | |||||||||||||||||||||
PCT International Application Number | PCT/CN2005/001405 | |||||||||||||||||||||
PCT International Filing date | 2005-09-05 | |||||||||||||||||||||
PCT Conventions:
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