RU2782674C2 - Biomass heating unit of a biogas plant - Google Patents

Abstract

FIELD: thermal engineering.

SUBSTANCE: invention relates to the field of thermal engineering and can be used in biogas plants for heating biomass. The biomass heating unit of a biogas plant contains a controller, a fermenter with a heat jacket through which the working coolant circuit passes, a temperature sensor connected to the controller, a return mains water pipeline, and a combustion products gas flue are installed inside the fermenter. The peculiarity of the claimed unit is that the water-water heater of the first stage connected via the heating medium to the return mains water pipeline and the gas-water heater of the second stage connected via the heating medium to the gas flue of the outgoing combustion products are sequentially included in the circuit of the working coolant. The controller is connected by pulse lines to the flow regulator on the return mains water pipeline in front of the water-water heater of the first stage and to the regulating gate on the gas flue of the outgoing combustion products in front of the gas-water heater of the second stage.

EFFECT: increase in the efficiency and efficiency of the biomass heating unit due to a more complete use of the heat of the return network water and combustion products.

1 cl, 1 dwg

Description

The invention relates to the field of heat engineering and can be used in biogas plants for heating biomass.

An analogue is known - a biomass heating unit of a biogas plant containing a controller, a fermenter with a heat jacket included in the working coolant circuit, a return network water pipeline and a flue of outgoing combustion products, a temperature sensor connected to the controller is installed inside the fermenter (see patent RU 106895 U1, publ. 07/27/2011). This analogue is taken as a prototype.

The disadvantage of the analogue and the prototype is the reduced efficiency of biogas heating due to the increased consumption of thermal energy when using network water immediately after it is heated in the heat generator and the non-use of the heat of the outgoing combustion products during the inter-heating period.

The technical problem to be solved by the invention is the development of a highly economical unit for heating the biomass of a biogas plant, which uses secondary energy resources.

The technical result is to increase the efficiency and efficiency of the biomass heating unit of a biogas plant due to a more complete use of the heat of the return network water and the outgoing combustion products.

To achieve this result, a biomass heating unit of a biogas plant is proposed, containing a controller, a fermenter, a thermal jacket, a working heat carrier circuit, a return network water pipeline and a flue of outgoing combustion products, a temperature sensor connected to the controller is installed inside the fermenter.

The peculiarity of the unit is that in front of the fermenter's heat jacket, the working heat carrier circuit is connected in series with the water-to-water heater of the first stage, connected via the heating medium to the return network water pipeline, and the gas-water heater of the second stage, connected via the heating medium to the flue of the outgoing products combustion, at the outlet of the fermenter, a circulation pump is connected to the working heat carrier circuit, the controller is connected by impulse lines to the flow regulator on the return network water pipeline before the water-to-water heater of the first stage and with the control gate on the flue gas duct of the outgoing combustion products before the gas-to-water heater of the second stage.

The set of features of the claimed invention, which are in a constructive and technological relationship, allows you to provide the required temperature in the fermenter, using the heat of the return network water and the outgoing combustion products.

Next, consider the information confirming the possibility of implementing the claimed solution to obtain the desired technical result.

The drawing shows a diagram of the biomass heating unit of a biogas plant. The unit contains a controller 1, a fermenter 2 with a heat jacket 3 included in the circuit 4 of the working heat carrier, after the heat jacket 3, the circulation pump 5 is included in the circuit 4 of the working heat carrier, which sequentially supplies the working heat carrier to the water-to-water heater 6 of the first stage, connected via the heating medium into the pipeline 7 of the return network water, and into the gas-water heater 8 of the second stage, connected through the heating medium to the flue 9 of the outgoing combustion products. A temperature sensor 10 is installed in the fermenter 2, connected to the controller 1. On the pipeline 7 of the return network water in front of the water-to-water heater 6 of the first stage, a flow controller 11 is installed, connected by an impulse line 12 to the controller 1. On the flue 9 of the outgoing combustion products in front of the gas-water the heater 8 of the second stage is equipped with a control gate 13 connected by an impulse line 14 to the controller 1.

Node heating biomass biogas plant operates as follows. The coolant along the circuit of the working coolant 4 is supplied by the circulation pump 5 to the water-to-water heater 6 of the first stage, where it takes heat from the return network water flowing through the pipeline 7 and is heated to a temperature of 38-50°C. The signal from the temperature sensor 10 installed in the fermenter 2 enters the controller 1. The flow rate of the return network water is regulated using the flow controller 11, to which a pulse from the controller 1 is received via the impulse line 12. After the water-to-water heater 6 of the first stage, the coolant is supplied to the gas - water heater 8 of the second stage, where it takes heat from the outgoing combustion products supplied through the gas duct 9, is heated to the required temperature of 55-60 ° C and then enters the heat jacket 3, where it gives off heat to the biomass. The flow rate of the outgoing combustion products through the gas-water heater 8 of the second stage is controlled by the control gate 13, to which a pulse from the controller 1 is received via the impulse line 14.

Thus, the proposed solution makes it possible throughout the year to provide the necessary temperature regime for the operation of the biomass heating unit and increase the efficiency and effectiveness of its operation due to a more complete use of the heat of the return network water and combustion products.

Claims (1)

A biomass heating unit in a biogas plant containing a controller, a fermenter with a heat jacket included in the working heat carrier circuit, a return network water pipeline and a flue gas duct for the outgoing combustion products, a temperature sensor connected to the controller is installed inside the fermenter, characterized in that before the fermenter heat jacket in the circuit of the working heat carrier, the water-to-water heater of the first stage is connected in series, connected via the heating medium to the return network water pipeline, and the gas-to-water heater of the second stage, connected via the heating medium to the gas flue of the outgoing combustion products, at the outlet of the fermenter, a circulation pump is connected to the circuit of the working heat carrier , the controller is connected by impulse lines to the flow regulator on the return network water pipeline in front of the water-to-water heater of the first stage and to the control gate on the gas duct of the outgoing combustion products in front of the gas-to-water heater of the second stage.

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