Integrated lime hydrator

Patent metadata

Field	Value
Publication number	US-2019292100-A1
Application number	US-201716316365-A
Country	US
Kind code	A1
Filing date	Jul 4, 2017
Priority date	Jul 11, 2016
Publication date	Sep 26, 2019
Grant date	—

Abstract

A lime hydrator integrated into a flue gas desulfurization system or other industrial system is provided that provides an in-situ variable rate of cured hydrated lime production for a variable supply rate of the in-situ produced cured hydrated lime for use within a flue gas stream as a moistened hydrated lime for a reduction of acid gas present in a flue gas stream. Also provided is a method of using a lime hydrator integrated into a flue gas desulfurization system or other industrial system to provide in-situ a variable production rate of cured hydrated lime for a variable supply rate of the in-situ produced cured hydrated lime for use within a flue gas stream as a moistened hydrated lime for a reduction of acid gas present in a flue gas stream.

First claim

1 . A plant comprising:
an integrated lime hydrator comprising at least one first stage housing equipped with an adjustable control weir, a water supply a paddle set and a quicklime supply, operative to produce hydrated lime.

2 . The plant of claim 1 , wherein the integrated lime hydrator further comprises a second stage housing equipped with a paddle set and a hydrated lime supply from the first stage housing operative to produce cured hydrated lime.

3 . The plant of claim 1 , wherein the integrated lime hydrator further comprises a second stage housing equipped with a paddle set and a hydrated lime supply from the first stage housing operative to produce cured hydrated lime; and
wherein the integrated lime hydrator is integrated with
a distribution device equipped with a water supply and a cured hydrated lime supply from the second stage housing, the distribution device operative to produce moistened hydrated lime and to distribute the moistened hydrated lime, and
a reactor equipped with a flow of flue gas and a moistened hydrated lime supply from the distribution device operative for moistened hydrated lime distribution within the flow of flue gas for a reduction in flue gas acid gas to produce cleaned flue gas.

4 . The plant of claim 1 , wherein the quicklime supply is supplied via a conveyor supplying quicklime from a quicklime silo via a feeder.

5 . The plant of claim 1 , wherein the first stage housing is equipped with a cooling jacket operative for temperature control.

6 . The plant of claim 1 , wherein the first stage housing is operated at a temperature in the range of about 50 degrees Celsius to about 200 degrees Celsius.

7 . The plant of claim 1 , wherein the integrated lime hydrator further comprises a second stage housing operated at a temperature in the range of about 50 degrees Celsius to about 200 degrees Celsius.

8 . The plant of claim 1 , wherein the water supply, quicklime supply, adjustable control weir and temperature of the first stage housing are each controlled by a control device.

9 . The plant of claim 1 , further comprising temperature sensors for temperature control controlled by a control device.

10 . A method of using an integrated lime hydrator in a plant comprising:
producing in at least one first stage housing equipped with an adjustable control weir, a water supply and a quicklime supply, hydrated lime; and producing in a second stage housing equipped with a hydrated lime supply from the at least one first stage housing, cured hydrated lime in-situ.

11 . The method of claim 10 , further comprising
producing in a distribution device equipped with a water supply and a cured hydrated lime supply from the second stage housing, moistened hydrated lime; and reacting in a vertical reactor equipped with a flow of flue gas and moistened hydrated lime supplied from the distribution device, the moistened hydrate lime with the flow of flue gas for flue gas acid gas reduction to produce cleaned flue gas.

12 . The method of claim 10 or 11 , further comprising equipping the first stage housing with a cooling jacket operative for temperature control.

13 . The method claim 10 , further comprising operating the first stage housing at a temperature in the range of about 50 degrees Celsius to about 200 degrees Celsius.

14 . The method of claim 10 , further comprising operating the second stage housing at a temperature in the range of about 50 degrees Celsius to about 200 degrees Celsius.

15 . The method of claim 10 , further comprising controlling the water supply, the quicklime supply, the adjustable control weir, a temperature of the first stage housing, and a temperature of the second stage housing using a control device.

Assignees

• General Electric Technology Gmbh

Inventors

• Wang Wunyin
• Landmer Per Hakan Fredrik
• Johansson Evald
• Johansson Lars-Erik

Classifications

• B01D2251/604

  Hydroxides · CPC title

• B01D2251/404

  of calcium · CPC title

• B01D53/504

  characterised by a specific device · CPC title

• B01D53/80

  Semi-solid phase processes, i.e. by using slurries · CPC title

• C04B2/08 Primary

  Devices therefor · CPC title