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US 11,662,142 B2Granted
System for reheating air in dryers
AssigneesCmpc Tissue S.A., Andritz Inc.
InventorsReinaldo Augusto Uribe Arancibia, George Z. Nowakowski
Life of this patent
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Abstract
An exemplary process air recirculation system, and an electric heater mixing apparatus is disclosed herein. Exemplary process air recirculation systems comprise the electric heating mixing apparatus. An exemplary electric heating mixing apparatus comprises: walls defining a first chamber having a first upstream opening and a first downstream opening, and a second chamber having a first upstream opening and a first downstream opening, wherein the second chamber is adjacently disposed to the first chamber, a first inlet damper disposed at the first upstream opening, a second inlet damper disposed at the second upstream opening, and a resistance-type electric air heater disposed in the first chamber.
Claims17
A process air recirculation system comprising:
- a dryer;
- a process air outlet conduit;
- a reheated air inlet conduit;
- and
- an electric heater mixing plenum having:
- an upstream end configured to fluidly communicate with the process air outlet conduit, wherein the process air outlet conduit is configured to fluidly communicate with an output of the dryer and the upstream end of the electric heater mixing plenum,
- a downstream end configured to fluidly communicate with the reheated air inlet conduit, wherein the reheated air inlet conduit is configured to fluidly communicate with the downstream end of the electric heater mixing plenum and an input of the dryer,
- walls defining a first chamber having a first upstream opening at the upstream end of the electric heater mixing plenum and a first downstream opening, and a second chamber having a second upstream opening at the upstream end of the electric heater mixing plenum and a second downstream opening, wherein the second chamber is adjacently disposed to the first chamber within the electric heater mixing plenum,
- a first inlet damper disposed at the first upstream opening,
- a second inlet damper, separate from the first inlet damper, disposed at the second upstream opening,
- a mixing chamber disposed downstream of the first downstream opening and the second downstream opening configured to fluidly communicate with the reheated air inlet conduit;
- and
- a resistance-type electric air heater disposed in the first chamber.
10 more elements
An electric heater mixing plenum comprising:
- an upstream end configured to fluidly communicate with a process air outlet conduit,
- wherein the process air outlet conduit is configured to fluidly communicate with an output of a dryer and the upstream end of the electric heater mixing plenum,
- a downstream end configured to fluidly communicate with a reheated air inlet conduit, wherein the downstream end is distally disposed from the upstream end,
- and the reheated air inlet conduit is configured to fluidly communicate with the downstream end of the electric heater mixing plenum and an input of the dryer,
- walls defining a first chamber having a first upstream opening at the upstream end of the electric heater mixing plenum and a first downstream opening, and a second chamber having a second upstream opening at the upstream end of the electric heater mixing plenum and a second downstream opening, wherein the second chamber is adjacently disposed to the first chamber within the electric heater mixing plenum;
- a first inlet damper disposed at the first upstream opening,
- a second inlet damper, separate from the first inlet damper, disposed at the second upstream opening,
- a resistance-type electric air heater disposed in the first chamber;
- and
- a first sensor disposed in the reheated air inlet conduit;
- a second sensor disposed proximate the first downstream opening;
- a third sensor disposed in the second chamber;
- and
- a fourth sensor disposed proximate to the first upstream opening, wherein each of the first sensor, second sensor, third sensor, and fourth sensor is configured to measure a temperature or a pressure of a process air passing any of the first sensor, second sensor, third sensor, or fourth sensor to define a first, second, third, or fourth sensor measurement, and wherein each of the first sensor, second sensor, third sensor, or fourth sensor is configured to transmit the respective sensor measurement to a controller.
11 more elements
An electric heater mixing plenum, comprising:
- an upstream end configured to fluidly communicate with a process air outlet conduit, wherein the process air outlet conduit is configured to fluidly communicate with an output of a dryer and the upstream end of the electric heater mixing plenum,
- a downstream end configured to fluidly communicate with a reheated air inlet conduit, wherein the reheated air inlet conduit is configured to fluidly communicate with the downstream end of the electric heater mixing plenum and an input of the dryer,
- walls defining a first chamber having a first upstream opening at the upstream end of the electric heater mixing plenum and a first downstream opening, and a second chamber having a second upstream opening at the upstream end of the electric heater mixing plenum and a second downstream opening, wherein the second chamber is adjacently disposed to the first chamber within the electric heater mixing plenum,
- a first inlet damper disposed at the first upstream opening,
- a second inlet damper, separate from the first inlet damper, disposed at the second upstream opening,
- a mixing chamber disposed downstream of the first downstream opening and the second downstream opening configured to fluidly communicate with the reheated air inlet conduit;
- and
- a resistance-type electric air heater disposed in the first chamber.
5 more elements
Dependencies are inferred from the claim text.