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A method for starting up a system for oxidating organic bodies. The system includes a tubular body wherein an aqueous body is injected into the inlet thereof at a pressure P1 the tubular body having a first zone extending the inlet thereof, a second zone into which an oxidating compound can be injec

A method for starting up a system for oxidating organic bodies. The system includes a tubular body wherein an aqueous body is injected into the inlet thereof at a pressure P1 the tubular body having a first zone extending the inlet thereof, a second zone into which an oxidating compound can be injected into the output thereof. The inventive method includes the following steps: a first amount of thermal energy Q1 is provided in the first zone, the amount of thermal energy being able to raise the temperature of the liquid flowing through the tubular body from an initial temperature to a higher temperature T 1; and a determined amount of a combustible mixture which can react at the intermediate temperature T1 in order to provide an amount of thermal energy Q2 bringing the temperature of the liquid to a reaction temperature T2 is injected.

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The invention claimed is: 1. Process for starting up a system intended for the oxidation of organic bodies present in an aqueous effluent, said system comprising a tubular body (10) into the inlet (12) of which said aqueous effluent can be injected at a pressure P1 corresponding to at least the cri

The invention claimed is: 1. Process for starting up a system intended for the oxidation of organic bodies present in an aqueous effluent, said system comprising a tubular body (10) into the inlet (12) of which said aqueous effluent can be injected at a pressure P1 corresponding to at least the critical pressure of said aqueous effluent, said tubular body (10) having a first zone (16) extending said inlet (12), a second zone (18) into which an oxidising composition can be injected, and an outlet (14), said process comprising the steps of: providing to said first zone (16) of said tubular body (10), a first quantity of thermal energy Q1, which is capable of raising the temperature of said aqueous effluent passing through said tubular body (10) from an initial temperature to a higher intermediate temperature T1, which is below a temperature at which said organic bodies oxidize and providing a definite quantity of a combustible mixture which is capable of reacting at a temperature lower than an oxidation temperature of the organic bodies and of which at least a first part can react at said intermediate temperature T1 to provide a second quantity of thermal energy Q2 raising the temperature of said aqueous effluent to a reaction temperature T2 and is injected into said tubular body (10) at said pressure P1 between said inlet (12) and said zone (16) of said tubular body ( 10) in such a way that injection of said oxidising composition into said second zone (18) brings about reaction of at least a second part of said combustible mixture providing a third quantity of energy Q 3 at said outlet (14) from said tubular body (10), a fraction of said third quantity of energy Q3 being applied to said first zone (16) of said tubular body (10) to raise the temperature of the aqueous effluent passing through it at least from said initial temperature to said intermediate temperature T1. 2. The process of claim 1, further comprising stopping providing of said first quantity of energy Q1 to said first zone (16) of said tubular body (10) when said fraction of said third quantity of energy Q3 is equal to at least Q1. 3. The process of claim 2, further comprising stopping an injection of said combustible mixture and injecting said aqueous effluent at the inlet (12) to said tubular body (10) when said fraction of said third quantity of energy Q3 is equal to at least the sum of Q1 and Q2 such as to raise the temperature of the fluid passing through said tubular body (10) from said initial temperature to said reaction temperature T2. 4. The process of claim 1, wherein said combustible mixture comprises a combustible material and an oxidising agent in substoichiometric proportion so that a first portion of said combustible material reacts with said oxidising agent when said combustible mixture is raised to said temperature T1 to provide said second quantity of energy Q2 and the second portion of said combustible material reacts with said oxidising composition. 5. The process of claim 4, wherein said combustible material and said oxidising agent are capable of releasing a quantity of energy in excess of 3 megaJoules per mole of molecules of combustible material. 6. The process of claim 4, wherein said combustible material has an activation energy of less than 1 kiloJoule per mole of molecules of said combustible material. 7. The process of claim 4, wherein said oxidising agent is hydrogen peroxide. 8. The process of claim 1, wherein said combustible material comprises glucose. 9. The process of claim 1, wherein said second quantity of energy Q2 which said combustible mixture is capable of providing represents between 40 and 80% of the sum of Q1 and Q2. 10. The process of claim 1, wherein said combustible mixture is injected into the inlet (12) of said tubular body (10). 11. Process for starting up a system intended for the oxidation of organic bodies present in an aqueous effluent, said system comprising a tubular body (10) into the inlet (12) of which said aqueous effluent can be injected at a pressure P1 corresponding to at least the critical pressure of said aqueous effluent, said tubular body (10) having a first zone (16) extending said inlet (12), a second zone (4) into which an oxidising composition can be injected, and an outlet (14), said process comprising the steps of: providing to said first zone (16) of said tubular body (10), a first quantity of thermal energy Q1 capable of raising the temperature of a aqueous effuent passing through the tubular body (10) from an initial temperature to a higher intermediate temperature T1; providing a definite quantity of a combustible mixture capable of reacting at a temperature lower than an oxidation temperature of the organic bodies and of which at least a first part can react at said intermediate temperature T1 to provide a second quantity of thermal energy Q2 raising the temperature of said fluid to a reaction temperature T2 and is injected into said tubular body ( 10) at said pressure P1 between said inlet (12) and said zone (16) of said tubular body (10) in such a way that injection of said oxidising composition into said second zone (18) brings about reaction of at least a second part of said combustible mixture providing a third quantity of energy Q3 at said outlet ( 14) from said tubular body (10), a fraction of said third quantity of energy Q3 being applied to said first zone (16) of said tubular body (10) to raise the temperature of the fluid passing through it at least from said initial temperature to said intermediate temperature T1; stopping providing of said first quantity of energy Q1 to said first zone (16) of said tubular body (10) when said fraction of said third quantity of energy Q3 is equal to at least Q1; and stopping an injection of said combustible mixture and injecting said aqueous effluent at the inlet (12) to said tubular body (10) when said fraction of said third quantity of energy Q 3 is equal to at least the sum of Q1 and Q2 such as to raise the temperature of the fluid passing through said tubular body ( 10) from said initial temperature to said reaction temperature T 2. 12. The process of claim 11, wherein said combustible mixture comprises a combustible material and an oxidising agent in substoichiometric proportion so that a first portion of said combustible material reacts with said oxidising agent when said combustible mixture is raised to said temperature T1 to provide said second quantity of energy Q2 and the second portion of said combustible material reacts with said oxidising composition. 13. The process of claim 11, wherein said combustible material and said oxidising agent are capable of releasing a quantity of energy in excess of 3 megaJoules per mole of molecules of combustible material. 14. The process of claim 11, wherein said combustible material has an activation energy of less than 1 kilojoule per mole of molecules of said combustible material. 15. The process of claim 11, wherein said oxidising agent is hydrogen peroxide. 16. The process of claim 11, wherein said combustible material comprises glucose. 17. The process of claim 11, wherein said second quantity of energy Q2 which said combustible mixture is capable of providing represents between 40 and 80% of the sum of Q1 and Q2. 18. The process of claim 11, wherein said combustible mixture is injected into the inlet (12) of said tubular body (10).