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CN-121797707-B - Electrolytic tank smoke flow balancing device

CN121797707BCN 121797707 BCN121797707 BCN 121797707BCN-121797707-B

Abstract

The invention relates to the technical field of electrolytic tank flue gas treatment, and particularly discloses an electrolytic tank flue gas flow balancing device which comprises a collecting pipeline, electrolytic tank main flue gas pipes and auxiliary flue gas pipe branch pipes, wherein the number of the electrolytic tank main flue gas pipes is a plurality, the plurality of the electrolytic tank main flue gas pipes are respectively arranged on the outer wall of the collecting pipeline at equal intervals along the left-right direction, the inner cavities of the electrolytic tank main flue gas pipes are communicated with the inner cavities of the collecting pipeline, the number of the auxiliary flue gas pipe branch pipes is a plurality, the plurality of the auxiliary flue gas pipe branch pipes are respectively arranged on the outer wall of the collecting pipeline at equal intervals along the left-right direction, and the inner cavities of the auxiliary flue gas pipe branch pipes are communicated with the inner cavities of the collecting pipeline. The device solves the defects of limited regulation effect of the traditional reducer pipe and high energy consumption and disturbance of the butterfly valve, achieves excellent and stable flow balance effect under the conditions of low system resistance and small regulation disturbance, and remarkably improves gas collection efficiency, system energy efficiency and operation reliability.

Inventors

  • LI XUEJIAO
  • SONG HAICHEN
  • HU HONGSHENG

Assignees

  • 沈阳博宇科技有限责任公司

Dates

Publication Date
20260508
Application Date
20260311

Claims (7)

  1. 1. An electrolyzer flue gas flow balancing device, comprising: the collecting pipeline (1), the collecting pipeline (1) comprises a plurality of reducing pipes with different diameters, the diameters of the reducing pipes gradually increase from left to right, and a straight pipe is connected between every two reducing pipes so as to form a reducing pipeline structure; The number of the main smoke pipes (2) of the electrolytic tank is a plurality, the main smoke pipes (2) of the electrolytic tank are respectively arranged on the outer wall of the collecting pipeline (1) at equal intervals along the left-right direction, the inner cavity of the main smoke pipe (2) of the electrolytic tank is communicated with the inner cavity of the collecting pipeline (1), and each main smoke pipe (2) of the electrolytic tank is a reducing pipe in a reducing pipeline structure; The auxiliary smoke pipe branch pipes (3) are arranged in number, the auxiliary smoke pipe branch pipes (3) are arranged on the outer wall of the collecting pipeline (1) at equal intervals along the left-right direction, the inner cavities of the auxiliary smoke pipe branch pipes (3) are communicated with the inner cavities of the collecting pipeline (1), and the positions of the auxiliary smoke pipe branch pipes (3) are in one-to-one correspondence with the positions of the main smoke pipes (2) of the electrolytic cells on the left side; The auxiliary smoke pipe main pipe (4), the outer ends of a plurality of auxiliary smoke pipe branch pipes (3) are arranged at the inner ends of the auxiliary smoke pipe main pipe (4), the inner cavities of the auxiliary smoke pipe branch pipes (3) are communicated with the inner cavities of the auxiliary smoke pipe main pipe (4), the right end of the auxiliary smoke pipe main pipe (4) is arranged at the right end of the collecting pipeline (1), and the inner cavities of the auxiliary smoke pipe main pipe (4) are communicated with the inner cavities of the collecting pipeline (1); The flow measuring devices (6) are arranged at the top of the inner cavity of the main smoke tube (2) of the electrolytic cell, and a plurality of the flow measuring devices (6) are electrically connected; the flow regulating mechanism (7) is arranged in the middle of the outer wall of the main smoke tube (2) of the electrolytic cell; the flow rate adjustment mechanism (7) includes: the number of the connecting flanges (71) is two, and the two connecting flanges (71) are respectively connected with the upper end and the lower end of the main smoke pipe (2) of the electrolytic cell through bolts; The device comprises a first valve body (72), wherein the upper end and the lower end of the first valve body (72) are respectively arranged at the inner ends of two connecting flanges (71), and a power groove (73) communicated with the inner cavity of the power groove is formed in the middle of the rear side of the outer wall of the first valve body (72); The upper end and the lower end of the elastic body (74) are respectively arranged on the upper side and the lower side of the inner cavity of the first valve body (72); and the execution assembly is arranged in the middle of the inner cavity of the first valve body (72).
  2. 2. An electrolyzer stack gas flow balancing device as claimed in claim 1, characterized in that: the execution assembly includes: The limiting base (75) is arranged in the middle of the inner cavity of the first valve body (72), the elastic body (74) penetrates through the inner cavity of the limiting base (75), an interval exists between the inner wall of the limiting base (75) and the outer wall of the elastic body (74), and six limiting grooves (76) are formed in the top end of the limiting base (75) at equal intervals along the circumferential direction; The limiting blocks (77) are six in number, and the six limiting blocks (77) are respectively and slidably inserted into the inner cavities of the six limiting grooves (76) in a matched mode; The middle part of the outer side of the bottom end of the extrusion block (78) is arranged at the top end of the limiting block (77), and the outer wall of the extrusion block (78) is contacted with the outer wall of the elastic body (74); A drive block (79), wherein the drive block (79) is arranged in the middle of the outer side of the top end of the extrusion block (78); The worm wheel driving disc (710), the worm wheel driving disc (710) is rotatably arranged in the middle of the inner cavity of the first valve body (72) through a bearing, the position of the worm wheel driving disc (710) corresponds to the position of the power groove (73), six driving grooves (711) penetrating up and down are formed in the top end of the worm wheel driving disc (710) at equal intervals along the circumferential direction, and the six driving blocks (79) are respectively slidably matched and inserted into the inner cavities of the six driving grooves (711); And the driving assembly is arranged at the rear side of the outer wall of the first valve body (72).
  3. 3. The flue gas flow balance device for an electrolytic cell according to claim 2, wherein the driving assembly comprises: The protective shell (712), the protective shell (712) is arranged in the middle of the rear side of the outer wall of the first valve body (72), and the power groove (73) is positioned in the inner cavity of the protective shell (712); The motor (713), the screw connection of said motor (713) is in the right side of the protective housing (712), the said motor (713) and flow measurement device (6) are electrically connected, the said motor (713) and flow measurement device (6) corresponding to it are electrically connected; the worm (714), one end of worm (714) is locked in the output of motor (713) through the shaft coupling, the other end of worm (714) is rotatably set up in the left side of protecting crust (712) through the bearing, the position of worm (714) corresponds with the position of power groove (73), worm (714) and worm wheel drive dish (710) mesh.
  4. 4. The device for balancing the flow of the flue gas of the electrolytic tank according to claim 3, wherein a differential pressure balancing mechanism (5) is arranged on the right side of the outer wall of the main pipe (4) of the auxiliary flue pipe.
  5. 5. A flue gas flow balance device for an electrolytic cell according to claim 4, wherein the included angle between the main flue pipe (2) of the electrolytic cell and the collecting main pipeline (1) is 30 degrees.
  6. 6. An electrolyzer stack gas flow balancing device as claimed in claim 5, characterized in that: the differential pressure balancing mechanism (5) comprises: The second valve body (51) is arranged on the right side of the outer wall of the auxiliary smoke pipe main pipe (4), and a valve hole (52) penetrating up and down is formed in the middle of the inner cavity of the second valve body (51); A drive cylinder (53), wherein the drive cylinder (53) is arranged at the top end of the second valve body (51); The piston (54) is slidably matched and inserted in the middle of the inner cavity of the driving cylinder (53); the top end of the valve rod (55) is arranged at the bottom end of the piston (54), the bottom end of the valve rod (55) slidably extends into the inner cavity of the second valve body (51), and the position of the valve rod (55) corresponds to the position of the valve hole (52); the valve core (56) is arranged at the bottom end of the valve rod (55), and the positions of the valve core (56) and the valve hole (52) are corresponding and matched; The spring (57), spring (57) cup joints in the outer wall of valve rod (55), the top joint of spring (57) is in the bottom of piston (54), the bottom joint of spring (57) is in the inner chamber bottom of actuating cylinder (53).
  7. 7. A flue gas flow balance device for an electrolytic cell according to claim 6, wherein the differential pressure balance mechanism (5) further comprises: the first communication pipe (58), one end of the first communication pipe (58) is arranged at the top end of the inner cavity of the driving cylinder (53), the other end of the first communication pipe (58) is arranged on the right side of the inner cavity of the auxiliary smoke pipe main pipe (4), and the inner cavity of the auxiliary smoke pipe main pipe (4) can be promoted to be communicated with the inner cavity of the driving cylinder (53) through the first communication pipe (58); The second communicating pipe (59), the one end of second communicating pipe (59) sets up in the inner chamber bottom of actuating cylinder (53), the other end of second communicating pipe (59) sets up in the inner chamber right side of collecting pipeline (1), can promote the inner chamber of collecting pipeline (1) and the inner chamber of actuating cylinder (53) to be linked together through second communicating pipe (59).

Description

Electrolytic tank smoke flow balancing device Technical Field The invention relates to the technical field of electrolytic tank flue gas treatment, in particular to a flue gas flow balancing device for an electrolytic tank. Background In the metallurgical industrial production of electrolytic aluminum and the like, the flue gas generated by the electrolytic tank is required to be effectively collected and treated through a smoke discharging system so as to meet the environmental protection requirement and recover valuable components, the traditional electrolytic tank flue gas collecting system generally adopts a collecting pipeline to be connected with main smoke pipes of a plurality of electrolytic tanks, and negative pressure generated by a tail end fan is used for uniform suction, however, in actual operation, due to the hydrodynamic characteristics, the tail end electrolytic tank far away from the fan often causes insufficient flue gas suction force and low flow in the main smoke pipe due to large pipeline along-way resistance and serious static pressure attenuation, and the electrolytic tank close to the fan is easy to generate overlarge flue gas flow due to lower static pressure and overlarge suction force at the position, so that the problem of uneven flow distribution of 'large middle, small ends' or 'large near ends and small ends' is not only reduced, the overall gas collecting efficiency is influenced, the environmental protection is met, but also partial flue gas overflow or partial overspray in the electrolytic tank is possibly caused, the production process stability is disturbed, and the energy consumption of the system is increased is also caused; In order to alleviate the problems, the prior art generally adopts two modes, namely, a reducing pipe is arranged on a collecting main pipeline, the on-way resistance distribution is regulated by gradually reducing the sectional area of the pipeline to try to balance the flow of each branch, a manual or electric butterfly valve is arranged on a main smoke pipe of each electrolytic tank, the flow distribution is manually or automatically interfered by regulating the opening degree of a valve to change the local resistance, however, the reducing pipe belongs to static structure regulation, once the reducing pipe is designed and shaped, the working condition change cannot be adapted, the lifting effect on the tail end flow is limited, the inherent problem of insufficient remote pumping force cannot be thoroughly solved, and the mode of regulating the butterfly valve is relied on has obvious defects that firstly, the butterfly valve generates larger local resistance in the regulating process, particularly, the throttling loss is obvious in the small opening degree, the whole operation energy consumption of the system is high, and secondly, the butterfly valve severely disturbs the flow state of air flow, vortex and pressure pulsation are easy to generate, and the stable conveying of smoke is influenced. Disclosure of Invention The invention aims to solve the defects of uneven distribution of the flue gas flow of an electrolytic tank caused by position difference and high energy consumption, large flow field disturbance and poor system stability caused by butterfly valve adjustment in the prior art, and provides a flue gas flow balancing device of the electrolytic tank. The invention provides a smoke flow balancing device for an electrolytic tank, which comprises a collecting pipeline, a main smoke pipe of the electrolytic tank, auxiliary smoke pipe branch pipes, auxiliary smoke pipe main pipes, a flow measuring device and a flow regulating mechanism, wherein the collecting pipeline comprises a plurality of reducing pipes with different diameters, the diameters of the reducing pipes are gradually increased from left to right, a straight pipe is connected between every two reducing pipes to form a reducing pipeline structure, the number of the main smoke pipes of the electrolytic tank is a plurality, the main smoke pipes of the electrolytic tank are respectively arranged on the outer wall of the collecting pipeline at equal intervals along the left-right direction, the inner cavity of the main smoke pipe of the electrolytic tank is communicated with the inner cavity of the collecting pipeline, each main smoke pipe of the electrolytic tank corresponds to the reducing pipes in the reducing pipeline structure, the auxiliary smoke pipe branch pipes are respectively arranged on the outer wall of the collecting pipeline at equal intervals along the left-right direction, the inner cavities of the auxiliary branch pipes are communicated with the inner cavities of the collecting pipeline, the positions of the auxiliary smoke pipe branch pipes are respectively arranged at the positions corresponding to the inner cavities of the main smoke pipe main pipes of the left side, the auxiliary smoke pipe main pipes are respectively arranged at the outer ends of the collec