Fluidized bed cooler with regional coordination enhancement

Patent metadata

Field	Value
Publication number	US-11338264-B2
Application number	US-202117153180-A
Country	US
Kind code	B2
Filing date	Jan 20, 2021
Priority date	Aug 19, 2020
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

The present disclosure discloses a fluidized bed cooler with regional coordination enhancement, comprising a shell, a catalyst inlet, an interior of the shell is divided into a catalyst inlet influence region, a dilute phase region, a dense phase region and a gas distributor influence region; a catalyst inlet inclined tube is provided obliquely upward at the catalyst inlet, and a regional particle distributor is provided at the catalyst inlet; the dense phase region is provided with a plurality of dense phase baffle plates, and the dilute phase region is provided with a plurality of dilute phase baffle plates; and the gas distributor influence region is provided with double gas distributors. The fluidized bed cooler simultaneously well solves the low internal stability and the low heat exchange efficiency of the fluidized bed cooler, thereby realizing the stable and efficient operation of the fluidized bed cooler.

First claim

What is claimed is:

1. A fluidized bed cooler with regional coordination enhancement, comprising a shell which is cylindrical and vertically provided, wherein a plurality of heat exchange tubes are vertically distributed in the shell, a catalyst inlet is provided at an upper portion of the shell, a catalyst outlet is provided at a bottom portion of the shell, and an interior of the shell is divided into a catalyst inlet influence region, a dilute phase region at the upper portion, a dense phase region at the lower portion and a gas distributor influence region at the bottom portion, and wherein the dilute phase region and the dense phase region are located above and below the catalyst inlet influence region, respectively, wherein a catalyst inlet inclined tube is provided obliquely upward at the catalyst inlet, and a regional particle distributor is provided at the catalyst inlet positioned in the catalyst inlet inclined tube;
wherein the regional particle distributor comprises a local gas distribution plate, a local gas pre-distributor, a left splitter partition plate and a right splitter partition plate; the local gas distribution plate is provided with a plurality of local gas distribution plate vent holes at intervals, the inner ends of the left splitter partition plate and the right splitter partition plate are fixedly connected to each other to form a partition plate included angle, the bottom portions of the left splitter partition plate and the right splitter partition plate are fixed on the local gas distribution plate, and the partition plate included angle is inside the local gas distribution plate, with outer ends of the left splitter partition plate and the right splitter partition plate extending beyond two ends of the local gas distribution plate, respectively; the local gas distribution plate is provided at a junction of the catalyst inlet inclined tube and the shell and is inclined upward towards the interior of the shell; and a lower portion of the catalyst inlet inclined tube is provided with a local fluidizing air inlet at a position directly opposite to the local gas distribution plate;
wherein the dense phase region is provided with a plurality of dense phase baffle plates, the dilute phase region is provided with a plurality of dilute phase baffle plates, both the dense phase baffle plate and the dilute phase baffle plate are provided with guide holes, and the plurality of heat exchange tubes sequentially pass through and are fixedly connected to the plurality of dense phase baffle plates and the plurality of dilute phase baffle plates vertically arranged at intervals so as to form a single piece; and
wherein the gas distributor influence region is provided with double gas distributors.

2. The fluidized bed cooler with regional coordination enhancement according to claim 1 , wherein the local gas distribution plate is shaped as a sector of 180°, and the plurality of local gas distribution plate vent holes on the local gas distribution plate are symmetrically distributed about a centerline of the local gas distribution plate; and
wherein the left splitter partition plate and the right splitter partition plate are both provided with a plurality of partition plate vent holes, wherein the left splitter partition plate and its partition plate vent holes as well as the right splitter partition plate and its partition plate vent holes are symmetrical about a vertical section where the centerline of the local gas distribution plate is located, respectively.

3. The fluidized bed cooler with regional coordination enhancement according to claim 2 , wherein a sharp corner at a top portion of the partition plate included angle is slotted to form a middle channel for facilitating the flowing of the fluidized catalyst particles.

4. The fluidized bed cooler with regional coordination enhancement according to claim 1 , wherein each of the heat exchange tubes comprises a water tube and a steam tube hermetically sleeving the water tube, a top end of each of the heat exchange tubes extends outside the shell, a water inlet is provided at a top portion of the water tube, and a steam outlet is provided at a top portion of the steam tube; and the plurality of heat exchange tubes in parallel form a heat exchange tube bundle.

5. The fluidized bed cooler with regional coordination enhancement according to claim 4 , wherein the double gas distributors comprise a central gas distributor and an annulus gas distributor, both of which are annular tube structures, wherein an outer diameter of the central gas distributor is smaller than the inter diameter of the annulus gas distributor, the central gas distributor and the annulus gas distributor are provided in parallel at the bottom portion inside the shell below the heat exchange tube bundle, and the central gas distributor is located below the annulus gas distributor;
wherein each of the central gas distributor and the annulus gas distributor is provided with a fluidizing air inlet, a bottom surface of the central gas distributor is circumferentially provided with a plurality of central gas distributor vent holes at intervals, a bottom surface of the annulus gas distributor is circumferentially provided with a plurality of annulus gas distributor vent holes at intervals, the fluidizing air inlet of the central gas distributor is communicated with the plurality of central gas distributor vent holes, and the fluidizing air inlet of the annulus gas distributor is communicated with the plurality of annulus gas distributor vent holes; and
wherein a central fluidizing air inlet and an annulus fluidizing air inlet are provided on the shell at positions corresponding to the central gas distributor and the annulus gas distributor, respectively, and are communicated with the fluidizing air inlet of the central gas distributor and the fluidizing air inlet of the annulus gas distributor, respectively.

6. The fluidized bed cooler with regional coordination enhancement according to claim 5 , wherein the central gas distributor vent hole is inclined towards a longitudinal centerline of the shell, so that fluidizing air from the central gas distributor vent hole flows to a center of the shell as much as possible; and
wherein the annulus gas distributor vent hole is inclined towards an inner wall of the shell, so that fluidizing air from the annulus gas distributor vent hole flows to a circumference of the inner wall of the shell as much as possible.

7. The fluidized bed cooler with regional coordination enhancement according to claim 1 , wherein each dense phase baffle plate is a bent plate in structure with a fold-line shaped or arc-shaped longitudinal section, and provided with a plurality of dense phase baffle plate guide holes; and
wherein in the dense phase region, the plurality of dense phase baffle plates are spirally arranged from bottom to top around a longitudinal centerline of the shell or arranged in a staggered manner from bottom to top along the longitudinal centerline of the shell.

8. The fluidized bed cooler with regional coordination enhancement according to claim 1 , wherein the dilute phase baffle plate is a cone frustum in structure, comprising an upper frustum circular hole, a lower frustum circular hole and a frustum body, the upper frustum circular hole and the lower frustum circular hole are connected through the frustum body, and the frustum body is provided with a plurality of dilute phase baffle plate guide holes; and
wherein the plurality of dilute phase baffle plates are located in the dilute phase region, centerlines of the dilute phase baffle plates are coincided with a longitudinal centerline of the shell, and one of adjacent dilute phase baffle plates is arranged upside-down with respect to the other of the ad

Assignees

• Univ China Petroleum Beijing

Inventors

• Lu Chunxi
• Li Jiantao
• Yao Xiuying

Classifications

• B01J2208/00752

  Feeding · CPC title

• B01J8/1881

  with particles moving downwards while fluidised · CPC title

• F28F9/24

  Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates (F28F1/38 takes precedence; in general F15D) · CPC title

• C10G11/18

  according to the "fluidised-bed" technique · CPC title

• F28F2009/222

  Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit · CPC title