# US 2018/0021690 A1 · Waste system utilizing waste heat to reduce water content in waste

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- Number: US 2018/0021690 A1
- Document ID: US20180021690A1
- Status: Published application
- Kind: A1
- Application number: 15/656,720
- Filed: 2017-07-21
- Published: 2018-01-25
- Earliest claimed: 2016-07-21
- Assignees: Stultman, LLC
- Applicants: Stultman, LLC
- Inventors: David Stultz
- Web page: https://patentgrep.com/patent/US20180021690A1

## CPC

- B01D 1/0058: {Use of waste energy from other processes or sources, e.g. combustion gas (for water treatment C02F1/16)}
- B01D 1/18: to obtain dry solids (B01D1/24 takes precedence)
- B01D 5/006: {with evaporation or distillation}
- C02F 1/12: Spray evaporation
- C02F 1/16: using waste heat from other processes
- C02F 2301/063: Underpressure, vacuum
- C02F 2303/10: Energy recovery
- 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)
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

According to an embodiment of the disclosure, a system reduces or eliminates the volume of waste or sewage by taking thermal energy from a waste heat source and applying it to waste or sewage. In particular configurations, the waste or sewage is homogenized and condensed prior to being sprayed across the waste heat. In particular configurations, the waste heat may be sprayed once a threshold amount of energy is contained in the waste heat.

## Claims

### Claim 1

A system comprising:
a pre-processing unit configured to make the waste more uniform;
a source of thermal energy; and
an evaporative processing unit, the evaporative processing unit configured to receive an output of the pre-processing unit and the source of thermal energy to yield dehydrated waste and evaporated water.

### Claim 2 (depends on 1)

The system of claim 1, wherein at least a portion of the source of thermal energy is waste heat.

### Claim 3 (depends on 1)

The system of claim 1, wherein the evaporative processing unit is reduced to a subambient pressure.

### Claim 4 (depends on 1)

The system of claim 1, wherein at least a portion of the dehydrated waste provides an energy source to at least partially power a unit to reduce the evaporative processing unit to a subambient pressure.

### Claim 5 (depends on 1)

The system of claim 1, wherein the waste is sprayed into the evaporative processing unit.

### Claim 6 (depends on 1)

The system of claim 1, wherein at least a portion of the dehydrated waste provides an energy source to at least partially power a unit to spray the waste into the evaporative processing unit.

### Claim 7 (depends on 1)

The system of claim 1, further comprising:
a condensing unit that condenses evaporated water.

### Claim 8 (depends on 6)

The system of claim 6, wherein the condensed evaporative water is potable.

### Claim 9 (depends on 1)

The system of claim 1, wherein at least a portion of the dehydrated waste is returned to supply at least a portion of the source of thermal energy.