# US 4,399,107 A · Anti-pollution and energy conservation system

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- Number: US 4,399,107 A
- Document ID: US4399107A
- Status: Granted
- Kind: A
- Application number: 06/154,479
- Filed: 1980-05-29
- Granted: 1983-08-16
- Earliest claimed: 1979-01-02
- Inventors: Ranendra K. Bose
- Web page: https://patentgrep.com/patent/US4399107A

## CPC

- F01N 13/009: {having two or more separate purifying devices arranged in series}
- B01D 53/62: Carbon oxides
- B01D 53/92: of engine exhaust gases (exhaust {or silencing} apparatus {for internal combustion engines, machines or engines in general}, having means for purifying, {rendering innocuous} or otherwise treating exhaust gases F01N3/00)
- F01N 3/021: by means of filters
- F01N 3/037: by means of inertial or centrifugal separators, e.g. of cyclone type, optionally combined or associated with agglomerators
- F01N 3/04: using liquids
- F01N 3/2882: {Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices (combined with absorbents or adsorbents only F01N3/0814; combined with particulate filters F01N3/035)}
- F02M 26/15: in relation to engine exhaust purifying apparatus
- F02M 26/35: with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
- F01N 2290/04: driven by exhaust gases
- F02M 26/36: with means for adding fluids other than exhaust gas to the recirculation passage; with reformers
- Y02T 10/12: Improving ICE efficiencies
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The invention provides a pair of exhaust gas separation stages comprised in a gas separating vortex tube having an exhaust gas operated turbine impeller or rotor with stator wheels. The system combination also includes a mixing chamber for heavier and lighter combustible gas components subsequent to separation, wherein such components are directed to the top surface of a water charge in the mixing chamber, and further includes a pair of chemical separation chamber downstream of the mixing chamber containing specified chemicals wherein the mixing chamber removes substantial parts of formaldehyde and nitrous oxides while the chemical chambers remove acetaldehyde and higher aldehyde components. Finally, the gas mixture from the chemical separation chamber passes through a water scrubber to remove traces of chemicals which may be used to keep traces of chemicals in the chemical chamber from reaching the engine. In particular, the use of a pair of chemical chambers in serial flow arrangement increases the actual life of the chemical solutions and also the efficiency of the aldehyde removal process.

## Claims

### Claim 1

In a system of the kind described for separating aldehyde pollutants from exhaust flow wherein said system has means for separating combustible and non-combustible exhaust components in exhaust gas, the improvement which comprises:
a pair of chemical separation chambers connected in tandem for serial flow of the combustible exhaust gas component therethrough;
one such chemical chamber having an aldehyde oxidizer and the second such chemical chamber having a higher aldehyde absorbent, for removal of aldehydes from said exhaust flow;
means for passing exhaust flow serially through such chemical chambers for retention in respective chambers of aldehyde components of exhaust gas;
including in combination therewith a mixing chamber upstream of said tandem chemical chambers and a scrubber chamber downstream of said tandem chemical chambers;
a multi-chamber tank and all of said chambers being comprised therein and being connected serially for sequential flow of exhaust gas therethrough;
said tank having an open top for all said chambers;
cover means sealingly closing the open tops of said chambers;
including tubes carried by said cover means for conducting exhaust flow sequentially through said chambers;
said cover means comprising an integral cover extending across the tops of said chambers and respective means sealing said cover at the open top of each said chamber;
said tubes comprising U-shaped members extending downwardly through said cover from said mixing chamber and each chemical chamber to said scrubber chamber so as to connect all of said chambers for flow sequence wherein each said chamber contains a liquid solution and the downstream ends of said tubes in said chemical and scrubber chambers extend below the surface of the liquid in the downstream chamber and wherein the upstream end of each of said tubes is above the liquid in the respective upstream chamber.

### Claim 2 (depends on 1)

In a system as set forth in claim 1, each of said chambers having a respective filler and drain opening, and flexible plug closures for said openings.

### Claim 3 (depends on 1)

In a system as set forth in claim 1, the periphery of said cover and said tank having flanges provided with registering bolt openings for securing said tank and cover together and to a mounting support.