[
    {
        "key": "GVJXXPX9",
        "version": 1,
        "library": {
            "type": "group",
            "id": 6064,
            "name": "Chemical Engineering",
            "links": {
                "alternate": {
                    "href": "https://www.zotero.org/groups/chemical_engineering",
                    "type": "text/html"
                }
            }
        },
        "links": {
            "self": {
                "href": "https://api.zotero.org/groups/6064/items/GVJXXPX9",
                "type": "application/json"
            },
            "alternate": {
                "href": "https://www.zotero.org/groups/chemical_engineering/items/GVJXXPX9",
                "type": "text/html"
            }
        },
        "meta": {
            "createdByUser": {
                "id": 62319,
                "username": "zorn81",
                "name": "",
                "links": {
                    "alternate": {
                        "href": "https://www.zotero.org/zorn81",
                        "type": "text/html"
                    }
                }
            },
            "numChildren": 0
        },
        "data": {
            "key": "GVJXXPX9",
            "version": 1,
            "itemType": "note",
            "note": "<p>A third common type of liquid distribution device is a chimney tray. This device uses a number of standpipes laid out typically on a regular square or triangular pitch pattern on a horizontal tray. The standpipes typically have holes or notches cut through the sides for the passage of liquid. The tops of the standpipes are open to allow vapor flow down through the center of the chimneys. Some designs use special vapor chimneys to handle the bulk of the vapor flow. Functionally, the chimney tray design is very similar to the perforated tray design, except the holes or perforations are elevated above the surface of the tray to allow some capacity to maintain a liquid level and hold debris that may collect of the tray. The chimney design is an improvement over a perforated tray, since it can be designed for a wider range of liquid/vapor loadings and is less susceptible to fouling. However, the spacing of the chimney risers typically reduces the number of distribution points compared to a perforated tray. A properly designed chimney must either become taller or have smaller holes drilled in the side to maintain a liquid level on the tray as the liquid rate changes. At turndown, it is possible that some holes will be covered with liquid and others will not. This results in uneven liquid distribution over the surface below the tray. Examples of this type are U.S. Patent 4,126,540 by Grossboll, et al., assigned to ARCO, and U.S. Patent 3,353,924 by Riopelle assigned to Shell Oil Co.</p>",
            "tags": [],
            "collections": [],
            "relations": {},
            "dateAdded": "2009-10-19T17:09:38Z",
            "dateModified": "2009-10-19T17:09:52Z"
        }
    },
    {
        "key": "BWQMGI39",
        "version": 1,
        "library": {
            "type": "group",
            "id": 6064,
            "name": "Chemical Engineering",
            "links": {
                "alternate": {
                    "href": "https://www.zotero.org/groups/chemical_engineering",
                    "type": "text/html"
                }
            }
        },
        "links": {
            "self": {
                "href": "https://api.zotero.org/groups/6064/items/BWQMGI39",
                "type": "application/json"
            },
            "alternate": {
                "href": "https://www.zotero.org/groups/chemical_engineering/items/BWQMGI39",
                "type": "text/html"
            }
        },
        "meta": {
            "createdByUser": {
                "id": 62319,
                "username": "zorn81",
                "name": "",
                "links": {
                    "alternate": {
                        "href": "https://www.zotero.org/zorn81",
                        "type": "text/html"
                    }
                }
            },
            "numChildren": 0
        },
        "data": {
            "key": "BWQMGI39",
            "version": 1,
            "itemType": "webpage",
            "title": "FEMA Library - FEMA's Multi-Hazard Identification and Risk Assessment (MHIRA)",
            "creators": [],
            "abstractNote": "",
            "websiteTitle": "",
            "websiteType": "",
            "date": "",
            "publisher": "",
            "place": "",
            "DOI": "",
            "citationKey": "",
            "url": "http://www.fema.gov/library/viewRecord.do?id=2214",
            "accessDate": "2009-10-19T11:47:22Z",
            "shortTitle": "",
            "language": "",
            "rights": "",
            "extra": "",
            "tags": [],
            "collections": [],
            "relations": {},
            "dateAdded": "2009-10-19T11:47:22Z",
            "dateModified": "2009-10-19T11:47:22Z"
        }
    }
]