Suez International

Terranova Energy Gmbh

Degremont

Pierre Emmanuel Pardo

Jean-Louis Bourdais

Eric Judenne

Ludovic Morice

Valerie Nastasi

Hugues Vanden Bossche

Jean Louis Bourdais

Marc Buttmann

Valérie Nastasi

Disclosed is a method for heating a biomass moving along an industrial treatment line including an inlet () for the incoming biomass, a pressure pump (), a heating unit () and a treatment station (). According to an embodiment, steam is injected into the line between the pressure pump () and the heating unit () such as to pre-heat the biomass by condensing the steam.

Method for the hydrothermal carbonisation of a biomass and associated device

Disclosed is a method for thermally drying pasty products, in particular wastewater sludge, and a belt dryer implementing such a method. The principle consists of partitioning the drying operations and using, for each of the successive operations, a different quality of air: (i) hot air for 'searing' the sludge, (ii) low temperature air, then (iii) cold air for quenching the sludge before the extraction of same. Also proposed are loops of air supply circuits making it possible to optimize the energy consumption of the dryer by reusing energy produced within these circuits. Moreover, the loops make it possible to recover unavoidable low temperature energy or cheap energy, further optimising the consumption of the dryer.

Method and facility for thermally drying pasty products

Disclosed is a piston press of the type used in the field of the dehydration of products to be dehydrated such as sludge from a purification plant. More particularly, it relates to a piston press including a pressing chamber supplied with sludge and able to manage air streams that it generates, and to a method for using such a press. In a preferred mode of embodiment, the piston press includes a pipeline having a water removal branch and arranged so as to remove water extracted during a sludge-pressing operation, and an air circulation branch that can channel the volumes of air circulating in the press during the operation thereof, so as to direct the vitiated air, i.e. air that has been brought into contact with the sludge during the implementation of the press, towards a deodorization system.

Method for managing air streams from mechanical dehydration of sludge, and corresponding device

A method of continuous hydrothermal carbonization of sludge containing organic matter, involving a stage of hydrothermal reaction carried out in a reactor (), includes:

Optimised energy efficiency hydrothermal carbonization method and device

A method of continuous hydrothermal carbonization of sludge containing organic matter involves a step of hydrothermal reaction carried out in a reactor, and at least one cooling step in which the sludge having undergone the hydrothermal reaction step is cooled. The hydrothermal reaction step includes: a step of injection of sludge in which the sludge is injected into the reactor by a first inlet; a step of injection of steam in which steam is injected into the reactor by a second inlet, the second inlet being distinct from the first inlet; a step of circulation, in which a mixture consisting of the sludge and the steam injected into the reactor is placed in circulation within the reactor; a step of continuous extraction of at least a portion of the mixture contained in the reactor by a sludge outlet. Also disclosed is a device for carrying out such a method.

Hydrothermal carbonization method and device with optimised sludge and steam mixing

Disclosed is a method for treating pulp, particularly a method for treating sludge from wastewater treatment plants, for producing energy and/or organic materials that have undergone hygienization, including at least the following steps: a step of aerated or non-aerated thermal hydrolysis of the pulp, a digestion step, a dehydration step and a step of recirculating part of the dehydrated pulp into the step of thermal hydrolysis.

Optimisation of a pulp treatment method

The present invention relates to the field of heat treatment of a product to be dehydrated, such as sludge from a waste water treatment process. The present invention relates more particularly to a method and to a facility for drying such a product, making it possible to implement a hydrothermal carbonization operation on reactorfollowed by a filtering and drying operation, preferably on a heating filter press. In order to dry said product in the heating filter press, a heat-transfer fluid from a heat exchangeris made to flow in said heating filter press. The heat exchangeris arranged so as to transfer, to the heat-transfer fluid, at least some of the heat contained in the product to be dehydrated that is output from the reactor

Method and facility for drying by means of hydrothermal carbonization and filtering

Disclosed is a method for heating a biomass moving along an industrial treatment line including an inlet () for the incoming biomass, a heating unit (), and a treatment station (). A fraction of the biomass heated by the heating unit () is returned along a return branch (R) to a mixing station () upstream of the heating unit () so as to form, together with the incoming biomass, a mixture having a temperature above the temperature of the incoming biomass, the heated biomass fraction being removed at an outlet () of the treatment station ().

The invention relates to a method for ultra-dehydrating thickened or pasty biomass products, in particular sludge from wastewater treatment plants, according to which the products, in particular products having a dryness of 4% to 25%, are subjected to the following steps: hydrothermal carbonization treatment, including pressurization () and thermal conditioning () for a duration in a closed reactor (); followed by dehydration of the products by a ram press (), obtaining a dryness of more than 50%; the temperature of the product upstream from the ram press dehydration being regulated by cooling between 40&#xb0; C. and 90&#xb0; C., advantageously to around 70&#xb0; C., in order to optimize the filterability in the piston press; the steps of the method being performed in a confined space making it possible to prevent the release of smells into the atmosphere.

Method for ultra-dehydrating thickened or pasty biomass products, and equipment for implementing the method

Disclosed is a reactor for treating, particularly by hydrothermal carbonization, sludge containing organic matter, including, with:

Reactor for hydrothermal carbonization with optimized mixture of sludge and steam

A method and facility for the hydrothermal carbonization of pasty products or waste, or sewage sludge, in a pressurized reactor heated to carbonization temperature T0. Before entering the reactor, the products undergo: pressurization, and preheating in an exchanger, by a thermal fluid flowing in a closed loop, and receiving heat from products exiting the reactor; the thermal fluid is heated in the loop by an external heat source, downstream from the exchange with the products exiting the reactor, and upstream from the preheating of the products entering the reactor, and the temperature of the product to be treated, preheated by the thermal fluid, when it enters the reactor, is between the carbonization temperature T0 and T0-100&#xb0; C. The product to be treated flows in at least one tube, where in at least one location therein, liquid is injected to create a liquid ring against the inner wall, and reduce pressure drops.

Optimised hydrothermal carbonisation method and facility for implementing same

The invention relates to a method for drying slurry-like materials, in particular sludge from wastewater treatment plants, including two drying stages, namely: a first indirect drying stage (), supplied with hot fluid, which receives sludge having an entry dryness Se, and outputs sludge having an intermediate dryness Si and water steam, which is channelled towards a condenser () in which a heating fluid, in particular water, is reheated and, in turn, heats a heating gas for a second drying stage (); and a step () of forming strings of sludge at the exit from the first stage; the second stage () of drying the strings of sludge using gas at least partially heated by the heat extracted from the condenser, said second stage outputting a slurry having a final dryness Sf; the intermediate dryness Si is controlled according to the measured entry dryness Se and the desired exit dryness Sf, for minimum consumption of the total energy used for drying, the flow rate, pressure and/or temperature of the hot fluid () supplying the first drying stage () being adjusted accordingly.

Growing community of inventors

Orsay, France

Pierre Emmanuel Pardo