Desulfurization device

{
  "publication_number": "US11364467B2",
  "country": "US",
  "kind": "B2",
  "title": "Desulfurization device",
  "abstract": "Provided is a desulfurization device that allows for the easy and accurate disposition of a spray pipe inside an absorption tower. Provided is a desulfurization device including: an absorption tower (10); and a spray pipe (20) disposed inside the absorption tower (10). The spray pipe (20) includes: a cylindrical pipe portion (21), the leading end of which is closed; and an attachment flange (24) attached to the pipe portion (21). The absorption tower (10) includes: an opening hole (14 e) opening toward the side; and a flange (14 a) disposed around the opening hole (14 e). The attachment flange (24) and the flange (14 a) are detachably attached.",
  "claims": [
    "1. A desulfurization device comprising: an absorption tower serving as a passage for exhaust gas; and a spray pipe disposed inside the absorption tower, wherein the spray pipe includes a cylindrical pipe portion having a leading end closed, a first flange portion attached to the pipe portion, and a leg portion attached to a lower portion of the pipe portion in the vertical direction, the absorption tower includes an opening hole opening laterally, a second flange portion disposed around the opening hole, and a supporting portion configured to support the leg portion of the spray pipe, the first flange portion and the second flange portion are detachably attached.",
    "2. The desulfurization device according to claim 1, comprising: a prescribed number of the spray pipes, wherein the absorption tower includes a prescribed number of the opening holes, and a prescribed number of the second flange portions, and a prescribed number of the first flange portions are respectively attached to the prescribed number of the second flange portions in a one-to-one manner.",
    "3. The desulfurization device according to claim 1, wherein an axis line of the pipe portion extends along a horizontal direction, and a position of the axis in a vertical direction is disposed lower than a center position of the opening hole in the vertical direction.",
    "4. The desulfurization device according to claim 1, wherein the pipe portion is disposed in a state where a lower end portion of the pipe portion does not contact the opening hole.",
    "5. The desulfurization device according to claim 1, wherein the first and second flange portions are generally rectangular in shape with the corners cut off.",
    "6. The desulfurization device according to claim 1, wherein the center position of the pipe when looking from the end of the pipe is offset from the center of the hole.",
    "7. The desulfurization device according to claim 1, wherein the opening hole is rectangular.",
    "8. The desulfurization device according to claim 7, wherein the first flange portion and the second flange portion are rectangular in shape.",
    "9. A desulfurization device comprising: an absorption tower serving as a passage for exhaust gas; and a spray pipe disposed inside the absorption tower, wherein the spray pipe includes a cylindrical pipe portion having a leading end closed, a first flange portion attached to the pipe portion, and a leg portion attached to a lower portion of the pipe portion in the vertical direction, the absorption tower includes an opening hole opening laterally, and a second flange portion disposed around the opening hole, and the first flange portion and the second flange portion are detachably attached, wherein an axis line of the pipe portion extends along a horizontal direction, and a position of the axis in a vertical direction is disposed lower than a center position of the opening hole in the vertical direction, and a position of a lower end of the leg portion in the vertical direction is disposed lower than a position of a lower end of the opening hole in the vertical direction.",
    "10. A desulfurization device according to claim 1, comprising: an absorption tower serving as a passage for exhaust gas; and a spray pipe disposed inside the absorption tower, wherein the spray pipe includes a cylindrical pipe portion having a leading end closed, and a first flange portion attached to the pipe portion, the absorption tower includes an opening hole opening laterally, and a second flange portion disposed around the opening hole, and the first flange portion and the second flange portion are detachably attached, wherein the spray pipe includes a leg portion attached to a lower portion of the pipe portion in the vertical direction and having a first surface, a plurality of nozzle holders disposed at a plurality of locations on an upper portion of the pipe portion in the vertical direction, and guiding a liquid absorbent upward in the vertical direction, the liquid absorbent flowing through the pipe portion in the horizontal direction, and a spray nozzle detachably attached to each of the plurality of nozzle holders and injecting the liquid absorbent upward in the vertical direction, the desulfurization device comprises a supporting portion installed in the absorption tower to support the spray pipe and having a second surface, the spray pipe is supported in a state where the first surface faces the second surface, and a height from a lower end portion to an upper end portion of the opening hole is higher than a height from the first surface of the leg portion to an upper end portion of the nozzle holder, in the vertical direction."
  ],
  "description_excerpt": "The present disclosure relates to a desulfurization device including an absorption tower and a spray pipe.\n\nAn exhaust gas system such as a boiler installed in a power generation facility or the like is provided with a desulfurization device for removing sulfur oxide from the exhaust gas. This allows sulfur oxide contained in the exhaust gas emitted into the atmosphere to be reduced. In Patent Document 1 and Patent Document 2, disclosed is a liquid column type desulfurization device in which an liquid absorbent is injected upward from a plurality of nozzles provided in a spray pipe (branch pipe, header) installed horizontally, and a chemical reaction between a combustion exhaust gas and the liquid absorbent causes sulfur oxide in the combustion exhaust gas to be removed. In the liquid column type desulfurization device, a reaction force directed downward is applied to the spray pipe as the liquid absorbent is injected upward. A downward impactive force is also applied to the spray pipe when the upward injected liquid absorbent drops into contact with the spray pipe. Therefore, the spray pipe is needed to be installed in the absorption tower so that a breakage is not caused even if such reaction forces or impact forces applied to the spray pipe. In the liquid column type desulfurization device, in order to effectively bring the liquid absorbent into gas-liquid contact with the exhaust gas, it is necessary to inject the liquid absorbent from the nozzles of the spray pipe along a vertical direction.",
  "cpc": [
    "B01D 53/504",
    "B01D 2247/04",
    "B01D 2247/08",
    "B01D 2247/107",
    "B01D 2251/404",
    "B01D 2252/1035",
    "B01D 2257/302",
    "B01D 2257/304",
    "B01D 2258/0283",
    "B01D 47/06",
    "B01D 53/18",
    "B01D 53/50",
    "B01D 53/505",
    "B01D 53/78",
    "B05B 1/20",
    "F16B 5/02"
  ],
  "ipc": [
    "B01D 47/06",
    "B01D 53/18",
    "B01D 53/50",
    "B01D 53/78"
  ],
  "assignees": [
    "MITSUBISHI HITACHI POWER SYS LTD",
    "MITSUBISHI POWER LTD"
  ],
  "inventors": [
    "SUGITA SATORU",
    "USHIKU TETSU",
    "SASAKI RYOZO",
    "YOSHIZUMI NAOYUKI",
    "MIYACHI TSUYOSHI",
    "KAGAWA SEIJI"
  ],
  "filing_date": "2018-09-18",
  "publication_date": "2022-06-21",
  "grant_date": "2022-06-21",
  "priority_date": "2017-09-20",
  "application_number": "US-201816603931-A",
  "family_id": "65809795",
  "citations": [
    "CA2096702C",
    "CN102151471A",
    "CN102225308A",
    "CN105169915A",
    "CN202666682U",
    "DE19757438A1",
    "DE4224691A1",
    "JP2012005978A",
    "JP2012179533A",
    "JP2014149148A",
    "JPH01184023A",
    "JPH01258729A",
    "JPH09117635A",
    "JPH09225256A",
    "JPH11104449A",
    "US2010068111A1",
    "US5271873A",
    "US6550751B1",
    "US6613133B2"
  ]
}