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CN-224207746-U - Tail gas absorbing device in desulfurization waste liquid salt extraction process

CN224207746UCN 224207746 UCN224207746 UCN 224207746UCN-224207746-U

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a tail gas absorbing device in a desulfurization waste liquid salt extraction process, which comprises a collecting tower, a spraying system and a packing layer, wherein the packing layer is arranged below the spraying pipe, the packing layer comprises a packing support grid and a pall ring, the packing support grid is horizontally and fixedly arranged inside the collecting tower, the pall ring is horizontally paved above the packing support grid, the pall ring comprises an outer ring and an inner ring, the outer ring is flexibly arranged, the inner ring is rigidly arranged, the inner ring is inserted on the outer ring, the inner ring and the outer ring are in interference fit, the structure of the pall ring is improved, the rigidity of the pall ring is improved, the packing layer is applied to the spraying device for tail gas absorption, and the problem of mass transfer efficiency reduction caused by pall ring deformation is solved, so that liquid of the tail gas absorbing device is fully mixed with acid or alkaline gas in tail gas, and the absorption efficiency is enhanced.

Inventors

  • CHU ZHONGXIN
  • TIAN LEI
  • GUO YAPING

Assignees

  • 浙江志欣环保科技有限公司

Dates

Publication Date
20260508
Application Date
20241029

Claims (9)

  1. 1. The utility model provides a tail gas absorbing device in desulfurization waste liquid salt extraction process which characterized in that includes: the collecting tower (1), the spraying system (2) and the packing layer (3); The collecting tower (1) is arranged in a cylindrical shape, an air inlet (11) is formed in the top of the collecting tower (1), and an air outlet (12) is formed in the middle of the collecting tower (1); The spray system (2) is arranged on the collecting tower (1), the spray system (2) comprises a water tank (21), a spray pump (22) and a spray pipe (23), the water tank (21) is arranged on the outer side of the bottom of the collecting tower (1), the water tank (21) is communicated with the inside of the collecting tower (1), the water tank (21) is communicated with the spray pump (22), the spray pipe (23) extends from the spray pump (22) to the inside of the collecting tower (1), and a plurality of spray nozzles (231) are arranged on the part, located in the collecting tower (1), of the spray pipe (23). The utility model discloses a shower, including shower, packing layer (3) are including packing support grid (31) and pall ring (32), packing support grid (31) level fixed mounting in inside of collecting tower (1), the top tiling of packing support grid (31) pall ring (32), pall ring (32) include outer loop (321) and inner loop (322), outer loop (321) set up flexibly, inner loop (322) are the rigidity setting, and this inner loop (322) are inserted and are located on outer loop (321), and this inner loop (322) with interference fit sets up between outer loop (321).
  2. 2. The tail gas absorbing device in the process of extracting salt from desulfurization waste liquid according to claim 1, wherein: the outer ring (321) comprises an upper ring body (3211) and a lower ring body (3211) which are staggered and integrally arranged, the ring body (3211) comprises a circular ring (32111) and a plurality of hollow columns (32112), windows (32113) are formed between the two groups of parallel circular rings (32111) by the adjacent hollow columns (32112), and gaps (32114) are formed in the hollow columns (32112).
  3. 3. The tail gas absorbing device in the process of extracting salt from desulfurization waste liquid according to claim 2, wherein: The inner ring (322) is provided with two sets of, this inner ring (322) respectively with ring body (3211) corresponds the setting, and this inner ring (322) include annular seat (3221), stand (3222) and tongue piece (3223), stand (3222) are around the center pin of annular seat (3221), circumference equidistance array set up in on annular seat (3221), this stand (3222) with hollow post (32112) correspond the interlude cooperation, tongue piece (3223) with stand (3222) one-to-one and integrated into one piece set up, this tongue piece (3223) are the arc slice, and this tongue piece (3223) follow breach (32114) wear out, extend to the center pin setting of annular seat (3221).
  4. 4. A tail gas absorbing device in a desulfurization waste liquid salt extraction process according to claim 3, wherein: The circular ring (32111) corresponding to the annular seat (3221) is arranged in a flanging mode, and the circular ring (32111) is arranged to cover the annular seat (3221).
  5. 5. The tail gas absorbing device in the process of extracting salt from desulfurization waste liquid according to claim 1, wherein: The shower (23) is provided with two groups, the shower (23) of two groups are arranged in a staggered manner, the corresponding packing layer (3) is provided with two groups, and the packing layer (3) at the bottom layer is positioned above the air outlet (12).
  6. 6. The tail gas absorbing device in the process of extracting salt from desulfurization waste liquid according to claim 1, wherein: A plurality of transparent observation windows (13) are formed in the collection tower (1), and the interior of the collection tower (1) is observed through the transparent observation windows (13).
  7. 7. The tail gas absorbing device in the process of extracting salt from desulfurization waste liquid according to claim 1, wherein: The outer side wall of the collecting tower (1) is provided with a ladder stand guardrail (14).
  8. 8. The tail gas absorbing device in the process of extracting salt from desulfurization waste liquid according to claim 1, wherein: The middle part of the water tank (21) is provided with a filter screen (211), and the other side of the water tank (21) opposite to the spray pump (22) is provided with a water supplementing port (212) and a sewage draining outlet (213).
  9. 9. The tail gas absorbing device in the process of extracting salt from desulfurization waste liquid according to claim 8, wherein: The top of water tank (21) is provided with access door (214), and this access door (214) are located directly over filter screen (211), filter screen (211) pull dismouting setting.

Description

Tail gas absorbing device in desulfurization waste liquid salt extraction process Technical Field The utility model relates to the technical field of waste gas treatment, in particular to a tail gas absorption device in a desulfurization waste liquid salt extraction process. Background The tail gas generated in the process of extracting salt from the desulfurization waste liquid mainly comprises the following components of hydrogen sulfide, sulfur dioxide, ammonia gas, dust and other particles, wherein the hydrogen sulfide has toxic gas with pungent smell, the sulfur dioxide is harmful to the environment and human health, and the ammonia gas has pungent smell and has a stimulating effect on respiratory tract. Therefore, in order to ensure the comfort of workshop personnel operation, environmental protection and other requirements, part of the concentrated tail gas of equipment which cannot achieve full-closed treatment in the production process is required to be absorbed. At present, the most mainstream treatment mode of tail gas adopts an absorption method, wherein alkaline liquor absorption is to absorb hydrogen sulfide, sulfur dioxide and other acid gases in the tail gas by using alkaline solutions such as sodium hydroxide, calcium hydroxide and the like, and generate salt substances through chemical reaction. The reaction equation is H 2S+2NaOH→Na2S+2H2O;SO2+2NaOH→Na2SO3+H2 O. The oxidation absorption is to oxidize reducing gases such as hydrogen sulfide in the tail gas into harmless substances such as sulfate radical and the like by using oxidants such as sodium hypochlorite, hydrogen peroxide and the like, and then absorb the substances by using alkali liquor. For example, H 2S+NaClO→S↓+NaCl+H2 O, the generated elemental sulfur can be recycled. In order to improve the mixing efficiency between the tail gas and the absorption solvent, the existing spray tower applied to the absorption method mostly adopts a packing layer, and a large number of pall rings or Raschig rings are paved in the packing layer, so that the mass transfer efficiency is greatly improved, wherein the mass transfer efficiency of the pall rings can be improved by 20-40% compared with that of the Raschig rings. In order to avoid acid and alkali corrosion, the prior pall ring applied to the absorption method spray tower is made of PP material, and is very easy to deform due to extrusion when being applied to a packing layer because of softer PP material, and once deformed, the gas-liquid contact effect of the PP pall ring is poor. The original regular packing layer structure is destroyed, the gas-liquid flow path is changed, and the gas and the liquid can not be fully contacted, so that the mass transfer efficiency is reduced. Moreover, the deformed pall ring may also increase the fluid resistance, so that the pressure drop in the spray tower is increased, and the energy consumption of the system is increased. Disclosure of utility model Aiming at the prior art, the utility model aims to provide the tail gas absorbing device in the process of extracting salt from the desulfurization waste liquid, by improving the structure of the pall ring, the rigidity of the pall ring is improved, the pall ring replaces the original PP pall ring, and the device is applied to a spraying device for absorbing the tail gas, so that the problem of mass transfer efficiency reduction caused by the deformation of the pall ring is solved, the liquid of the tail gas absorbing device is fully mixed with acidic or alkaline gas in the tail gas, and the absorption efficiency is enhanced. In order to achieve the above purpose, the present utility model provides the following technical solutions: An exhaust gas absorbing device in a desulfurization waste liquid salt extraction process, comprising: The collecting tower, the spraying system and the packing layer; The collecting tower is arranged in a cylindrical shape, the top of the collecting tower is provided with an air inlet, and the middle of the collecting tower is provided with an air outlet; The spray system is arranged on the collecting tower and comprises a water tank, a spray pump and a spray pipe, wherein the water tank is arranged on the outer side of the bottom of the collecting tower, the water tank is communicated with the inside of the collecting tower, the water tank is communicated with the spray pump, the spray pipe extends from the spray pump to the inside of the collecting tower, and a plurality of spray nozzles are arranged on the part of the spray pipe, which is positioned in the collecting tower; The packing layer set up in the below of shower, this packing layer include packing support grid and pall ring, packing support grid level fixed mounting in inside the collecting column, the top tiling of this packing support grid the pall ring, the pall ring includes outer loop and inner loop, the outer loop is flexible to be set up, the inner loop is the rigidity setting, and this inner loop is ins