Back to results
US 12,617,705 B2Granted
Applying chemical oxygen demand and heating value diagnostics to enhance performance of a SCWO process
Assignee374Water Inc.
InventorsYaacov Nagar, David Ballenghien, Marc Deshusses
Life of this patent
Estimating the term…
Abstract
A system for on-line monitoring of a supercritical water oxidation (SCWO) process, the system including an SCWO reactor, a feedstock supply line which supplies a feedstock to the SCWO reactor, an oxidant supply line which supplies an oxidant to the SCWO reactor, at least one sensor which measures at least one parameter of the feedstock and the oxidant, and a controller which determines a Chemical Oxygen Demand (COD) and a Heating Value (HV) of the feedstock based on the at least one parameter, such that the controller adjusts the amount of the oxidant supplied to the SCWO reactor based upon the COD and the HV of the feedstock.
Claims15
A system for on-line monitoring of a supercritical water oxidation (SCWO) process, said system comprising:
- an SCWO reactor;
- a feedstock supply line which supplies a feedstock to said SCWO reactor;
- an oxidant supply line which supplies an oxidant to said SCWO reactor;
- at least one sensor which measures at least one parameter of said feedstock and said oxidant;
- a controller which determines a Chemical Oxygen Demand (COD) and a Heating Value (HV) of said feedstock based on said at least one parameter, such that said controller adjusts the amount of said oxidant supplied to said SCWO reactor based upon said COD and said HV of said feedstock;
- a co-fuel supply line which supplies a co-fuel to said SCWO reactor;
- and
- at least one co-fuel supply line sensor which measures at least one parameter of said co-fuel, wherein said controller adjusts the amount of said co-fuel based on said HV of said feedstock, wherein said controller determines said COD of said feedstock based on the following Equation 1 and said controller determines said HV of said feedstock based on the following Equation 2:
- the following equation 1 is:
- OMF
-
- m
- .
- Ox
- (
- t
- 0
- )
- -
- m
- ˙
- F
-
- D
- (
- t
- 0
- )
-
- COD
- F
-
- D
- (
- t
- 0
- )
- -
- m
- ˙
- C
-
- F
- (
- t
- 0
- )
-
- COD
- C
-
- F
- (
- t
- 0
- )
- =
- Q
- ˙
- G
- (
- t
- 0
- +
- τ
- )
-
- 1
- V
- M
- (
- t
- 0
- +
- τ
- )
-
- O
- 2
- G
- (
- t
- 0
- +
- τ
- )
-
- M
- O
- 2
- and,
- the following Equation 2 is:
- (
- m
- ˙
- o
- +
- m
- ˙
- F
-
- D
- )
-
- h
-
- (
- x
- i
- ,
- T
- R
- ,
- P
- )
- =
- m
- ˙
- o
-
- h
-
- (
- x
- j
- ,
- T
- o
- ,
- P
- )
- +
- m
- ˙
- F
-
- D
-
- h
-
- (
- x
- k
- ,
- T
- F
-
- D
- ,
- P
- )
- +
- m
- ˙
- F
-
- D
-
- H
-
- V
- -
- Φ
- where, the indexes FD, CF, Ox and G stand respectively for said feedstock, said co-fuel, said oxidant, and a gas effluent stream of said SCWO reactor;
- OMF stands for the oxygen mass fraction in said oxidant;
- {dot over (m)}* stands for the mass flow rate of stream *;
- COD* stands for said COD of stream *;
- {dot over (Q)}G stands for the volumetric flow rate of said gas effluent stream;
- O2G stands for the oxygen volumetric concentration of said gas effluent stream;
- VM stands for the molar volume of said gas effluent stream;
- MO2 stands for oxygen molar mass;
- τ stands for the system residence time;
- t0 stands for the timestamp to which said COD values refer;
- h stands for the specific enthalpy function;
- xi stands for the mass fraction of compound i, where i varies over the list of all the compounds;
- T* stands for the temperature of stream *;
- P stands for pressure;
- and Φ stands for the heat losses within said SCWO system.
175 more elements
A method for an on-line monitoring of a supercritical water oxidation (SCWO) process, said method comprising:
- supplying a feedstock and an oxidant to an SCWO reactor;
- measuring at least one parameter of said feedstock and said oxidant with at least one sensor;
- determining, with a controller, a Chemical Oxygen Demand (COD) and a Heating Value (HV) of said feedstock based on said at least one parameter;
- adjusting the supply of said oxidant based on said COD and said HV of said feedstock;
- supplying a co-fuel to said SCWO reactor;
- and
- adjusting the supply of said co-fuel based on said HV of said feedstock, wherein said controller adjusts the amount of said co-fuel based on said HV of said feedstock, wherein said controller determines said COD of said feedstock based on the following Equation 1 and said controller determines said HV of said feedstock based on the following Equation 2:
- the following equation 1 is:
- OMF
-
- m
- .
- Ox
- (
- t
- 0
- )
- -
- m
- ˙
- F
-
- D
- (
- t
- 0
- )
-
- COD
- F
-
- D
- (
- t
- 0
- )
- -
- m
- ˙
- C
-
- F
- (
- t
- 0
- )
-
- COD
- C
-
- F
- (
- t
- 0
- )
- =
- Q
- ˙
- G
- (
- t
- 0
- +
- τ
- )
-
- 1
- V
- M
- (
- t
- 0
- +
- τ
- )
-
- O
- 2
- G
- (
- t
- 0
- +
- τ
- )
-
- M
- O
- 2
- and,
- the following Equation 2 is:
- ({dot over (m)}O+{dot over (m)}FD)h(xi,TR,P)={dot over (m)}Oh(xj,TO,P)+{dot over (m)}FDh(xk,TFD,P)+{dot over (m)}FDHV−Φ
- where, the indexes FD, CF, Ox and G stand respectively for said feedstock, said co-fuel, said oxidant, and a gas effluent stream of said SCWO reactor;
- OMF stands for the oxygen mass fraction in said oxidant;
- {dot over (m)}* stands for the mass flow rate of stream *;
- COD* stands for said COD of stream *;
- {dot over (Q)}G stands for the volumetric flow rate of said gas effluent stream;
- O2G stands for the oxygen volumetric concentration of said gas effluent stream;
- VM stands for the molar volume of said gas effluent stream;
- MO2 stands for oxygen molar mass;
- τ stands for the system residence time;
- t0 stands for the timestamp to which said COD values refer;
- h stands for the specific enthalpy function;
- xi stands for the mass fraction of compound i, where i varies over the list of all the compounds;
- T* stands for the temperature of stream *;
- P stands for pressure;
- and Φ stands for the heat losses within said SCWO system.
104 more elements
Dependencies are inferred from the claim text.