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CN-122006468-A - Purifying device and process applied to carbon black tail gas treatment

CN122006468ACN 122006468 ACN122006468 ACN 122006468ACN-122006468-A

Abstract

The invention relates to the technical field of tail gas treatment and discloses a purification device and a purification process applied to carbon black tail gas treatment, wherein the purification device applied to carbon black tail gas treatment comprises a denitration treatment equipment main body, a connecting pipe is fixedly sleeved on the outer wall of a jet end of a jet pipe, a rotating frame is fixedly connected to the inner wall of the connecting pipe, a flow guide block is rotatably connected above the rotating frame, a plurality of through holes are formed in the middle of the connecting pipe at equal intervals in an annular shape, a lantern ring is sleeved on the outer wall of the connecting pipe, and a flow dividing ring is arranged in the connecting pipe. The arrangement of the flow guide block and the flow distribution ring enables ammonia in the connecting pipe to form two-way flow, one air flow is sprayed out through an annular gap between the flow guide block and the connecting pipe to form annular umbrella-shaped air flow, local low pressure effect caused by jet entrainment is weakened, the other air flow is sprayed out through the lantern ring, an annular air curtain is formed on the outer wall of the connecting pipe, and dust in tail gas is actively blocked from being close to a port of the connecting pipe.

Inventors

  • XIA KAI

Assignees

  • 吉林仁飞科技有限公司

Dates

Publication Date
20260512
Application Date
20260325

Claims (9)

  1. 1. Be applied to purifier of carbon black tail gas treatment, including denitration treatment facility main part (1), install ammonia injection grid (2) in the flue of denitration treatment facility main part (1), install many spray tubes (3) on ammonia injection grid (2), a serial communication port, spray tube (3) jet end outer wall is fixed to be cup jointed connecting pipe (4), connecting pipe (4) inner wall fixedly connected with rotating turret (5), rotating turret (5) top is connected with guide block (6), guide block (6) upper portion is circular cone form, and the lower part is circular truncated cone form, guide block (6) lower part sets up in connecting pipe (4) top port, connecting pipe (4) middle part is a plurality of through-holes (11) have been seted up to annular equidistant, connecting pipe (4) outer wall cover is equipped with lantern ring (27), lantern ring (27) lower extreme is less than through-hole (11) department and with connecting pipe (4) outer wall sealing connection, be provided with shunt ring (12) in connecting pipe (4), shunt ring (12) are installed in rotating turret (5) top rotation and are connected with guide block (6), the lower part is circular truncated cone form, guide block (6) lower part is equipped with in connecting pipe (4) top port (13), and the shunt ring (13) are equipped with and get into between inclined plane (13).
  2. 2. The purification device applied to carbon black tail gas treatment according to claim 1, wherein a rotating cavity (7) is formed in the lower portion of the flow guide block (6), the rotating frame (5) is of a T-shaped structure, the upper portion of the rotating frame (5) extends into the rotating cavity (7), a supporting ring (8) is arranged on the outer wall of the rotating frame (5), a plurality of balls (9) are rotatably connected to the top surface of the supporting ring (8) at equal intervals in an annular shape, and the balls (9) are in rolling contact with the top surface of the rotating cavity (7); the outer wall of the lower part of the guide block (6) is fixedly connected with a plurality of guide plates (10) at equal intervals in an annular shape, and the guide plates (10) are in a spiral structure.
  3. 3. The purification device for carbon black tail gas treatment according to claim 1, wherein the diameter of the middle part of the guide block (6) is larger than the outer diameter of the connecting pipe (4).
  4. 4. The purification device for carbon black tail gas treatment according to claim 2, wherein an impeller (14) is fixedly connected to the inner side of the flow dividing ring (12), a rotating shaft (15) is fixedly connected to the middle part of the impeller (14), and the rotating shaft (15) movably penetrates through the rotating frame (5) and extends into the rotating cavity (7); A plurality of diffusion grooves (16) are formed in the diversion inclined plane (13), and the depths of two adjacent diffusion grooves (16) are different.
  5. 5. The purification device for carbon black tail gas treatment according to claim 1, wherein a shielding ring (17) is sleeved at the upper end of the outer wall of the collar (27) in a sliding manner, a positioning ring (18) is arranged above the collar (27), the positioning ring (18) is fixedly arranged on the outer wall of the connecting pipe (4), and the shielding ring (17) is in lap joint with the positioning ring (18).
  6. 6. The purification device for carbon black tail gas treatment according to claim 4, wherein an annular groove (19) is formed in the guide block (6), the annular groove (19) is communicated with the rotating cavity (7), and a plurality of trapezoid blocks (20) are fixedly arranged on the top surface and the bottom surface of the groove body of the annular groove (19) at equal intervals in an annular shape; The rotary shaft (15) is fixedly connected with a cross rod (21) at the upper end, guide wheels (22) are rotatably connected to two ends of the cross rod (21), and the guide wheels (22) are arranged in the annular groove (19).
  7. 7. The purification device for carbon black tail gas treatment according to claim 2, wherein a plurality of protrusions are axially fixed on the upper portion of the rotating frame (5), the supporting ring (8) is vertically in sliding contact with the outer wall of the rotating frame (5), and a plurality of elastic pieces I (23) are commonly connected between the supporting ring (8) and the rotating frame (5).
  8. 8. The purification device for carbon black tail gas treatment according to claim 4, wherein a rotating groove (24) is formed in the rotating frame (5), a rotating plate (25) is arranged in the rotating groove (24), two elastic pieces (26) are connected between two sides of the rotating plate (25) and the rotating groove (24), and the middle part of the rotating plate (25) is fixedly connected with the rotating shaft (15).
  9. 9. A carbon black exhaust gas purifying process applied to the purifying device for carbon black exhaust gas treatment according to claim 1, characterized by comprising the steps of: S1, waste heat recovery, namely, enabling high-temperature tail gas to enter a front-stage flue of a denitration treatment equipment main body (1), and accurately adjusting the temperature of the flue gas to an optimal activity window of a catalyst through a waste heat recovery or heat exchange device; S2, ammonia gas mixing, namely spraying ammonia gas from a spray pipe (3) in the middle section flue, flowing in the same direction with tail gas, and uniformly mixing in a static mixer; S3, catalytic reduction reaction, namely, uniformly mixed gas enters an SCR reactor filled with a honeycomb or plate catalyst, and under the action of a catalyst surface active site, the mixed gas is subjected to selective catalytic reduction reaction to generate harmless nitrogen and water, so that tail gas denitration is realized; S4, purifying, namely, deeply purifying the denitrated tail gas in desulfurization equipment, monitoring ammonia escape amount, and discharging the tail gas after the tail gas is qualified.

Description

Purifying device and process applied to carbon black tail gas treatment Technical Field The invention relates to the technical field of tail gas treatment, in particular to a purifying device and a purifying process applied to carbon black tail gas treatment. Background In the production of carbon black, high-temperature tail gas generated by incomplete combustion of fuel contains high-concentration nitrogen oxides, sulfur dioxide and superfine carbon black dust, and the dust has small particle size, large specific surface area, strong adsorptivity and obvious pollution hazard. In order to achieve the environmental protection standard, the carbon black tail gas needs to be purified, denitration is a core process for removing nitrogen oxides in the tail gas, ammonia is sprayed to the flue gas through an ammonia spraying grid, and the nitrogen oxides are converted into harmless nitrogen and water under the action of a catalyst. The ammonia spraying grid is arranged in a flue of the denitration treatment equipment, the pretreated flue gas flows along the flue and contacts with ammonia sprayed by the ammonia spraying grid, and in the process, dust in the flue gas is very easy to adhere to a nozzle of the ammonia spraying grid and cause blockage. The blockage is complicated, and the local low pressure caused by jet entrainment causes dust to accumulate in the nozzle, and also relates to the back-flowing of dust-containing gas caused by the fluctuation of the smoke pressure when the equipment is started and stopped. The blocking of the nozzle can cause the linkage problems that firstly, the uniformity of ammonia spraying is damaged, the ammonia nitrogen ratio is disordered, the denitration efficiency is reduced, the ammonia escape amount is increased rapidly, the escaped ammonia reacts with sulfur trioxide in the flue gas to generate viscous ammonium bisulfate, the viscous ammonium bisulfate is firmly attached to the surface of a downstream filter bag after being combined with dust, the filter bag is hardened, the air permeability is reduced, the system resistance is increased suddenly, and finally, the filter bag is forced to be cleaned or replaced by unplanned shutdown. This not only seriously affects the continuous and stable operation of the purification apparatus, but also greatly increases maintenance costs. Therefore, the problem that the ammonia injection grid nozzle is easy to block is solved, and the method is a key for improving the reliability, economy and environmental protection efficiency of the carbon black tail gas treatment device. Disclosure of Invention In view of the problem that dust in tail gas is easy to block a spray pipe of an ammonia spraying grid to influence the uniformity of ammonia spraying in the prior art, the purifying device applied to carbon black tail gas treatment is provided. The device aims to reduce the low-pressure area at the pipe orifice by arranging a flow guiding block at the air outlet to diffuse the flowing range of ammonia, and simultaneously guide part of the ammonia to form an annular air curtain on the wall of the outer pipe so as to avoid the contact between dust and the pipe wall. The technical scheme of the invention is that the purification device applied to carbon black tail gas treatment comprises a denitration treatment equipment main body, an ammonia spraying grid is arranged in a flue of the denitration treatment equipment main body, a plurality of spray pipes are arranged on the ammonia spraying grid, connecting pipes are fixedly sleeved on the outer walls of the air spraying ends of the spray pipes, rotating frames are fixedly connected to the inner walls of the connecting pipes, flow guide blocks are rotatably connected above the rotating frames, the upper parts of the flow guide blocks are conical, the lower parts of the flow guide blocks are round table-shaped, the lower parts of the flow guide blocks are arranged in ports above the connecting pipes, a plurality of annular equidistant through holes are formed in the middle of the connecting pipes, lantern rings are sleeved on the outer walls of the connecting pipes, the lower ends of the lantern rings are lower than the through holes and are in sealing connection with the outer walls of the connecting pipes, a flow distribution ring is arranged in the connecting pipes, the flow distribution ring is arranged at the bottom of the rotating frames, and is provided with a flow distribution inclined surface for guiding part of ammonia gas to pass through the through holes and enter between the lantern rings and the connecting pipes. Further, a rotating cavity is formed in the lower portion of the flow guide block, the rotating frame is of a T-shaped structure, the upper portion of the rotating frame extends into the rotating cavity, a supporting ring is arranged on the outer wall of the rotating frame, a plurality of balls are connected to the top surface of the supporting ring in an annular equidistant