Biomass boiler and industrial waste heat combined heating technology

Abstract

The invention discloses a biomass boiler and industrial waste heat combined heating technology. Exergy wasted in the heating and heat exchanging process of high temperature steam generated by a biomass energy boiler is utilized, the running mode of independent heating of the biomass boiler is changed, biomass steam is used for driving a two-stage absorbing type heat pump, the industrial waste heatgrade is improved and is used for heating, the electric energy of an electric driving compression type heat pump is saved, and the energy consumption during industrial waste heat grade improvement isreduced. The steam generated by the biomass boiler is utilized as a driving heat source, the two-stage absorbing type heat pump is driven, parallel connection is adopted on the steam side, parallel connection is adopted on the industrial waste heat side, and serial connection is adopted on the heating pipe net side. By means of a flue gas waste heat recycling device, two or more heat exchangers are connected in series, and the flue gas waste heat is subjected to ladder utilizing. According to the heating temperature requirement condition, flue gas waste heat is utilized for firstly heating heating return water and then heating industrial waste heat return water. By means of automatic control system monitoring, automatic control switching, automatic recognizing and temperature monitoring,flue gas waste heat is applied at the position lower than a flue gas waste heat recycling and condensing point.

Description

technical field [0001] The invention belongs to the field of improving energy utilization efficiency, relates to recovery of second-class industrial waste heat, namely industrial waste heat and flue gas waste heat, and greatly improves heating energy efficiency. Background technique [0002] my country promotes clean energy to replace coal-fired boilers for heating. The main methods are gas and electricity. Both gas and electricity are high-grade energy. It is a waste of energy to use for heating. A large number of imports affect the security of my country's energy supply. my country is a country with a lot of coal, little oil and lack of gas. About 70% of my country's electricity is powered by coal. my country is a country with a high degree of industrialization, and the waste heat of northern industries is very huge. , Recycling industrial waste heat for heating is the most economical and feasible way, but most of the industrial waste heat exists in the form of medium and lo...

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Problems solved by technology

[0002] my country promotes clean energy to replace coal-fired boilers for heating. The main methods are gas and electricity. Both gas and electricity are high-grade energy. It is a waste of energy to use for heating. A large number of imports affect the security of my country's energy supply. my country is a country with a lot of coal, little oil and lack of gas. About 70% of my country's electricity is powered by coal. my country is a country with a high degree of industrialization, and the waste heat of northern industries is very huge. , Recycling industrial waste heat for heating is the most economical and feasible way, but most of the industrial waste heat exists in the form of medium and low grades, and the general temperature is below 40°C, so it cannot be directly used for heating, and it is not convenient for long-distance transportation At present, the recovery of low-grade waste heat generally uses electric-driven compression heat pumps to raise the low-grade waste heat to about 60°C and use it for heating residential quarters. This method consumes valuable high-grade energy.

[0003] Due to the transformation of coal into clean energy in our country, there are a large number of independent biomass energy boiler rooms at the same time. The boilers can produce high-temperature and high-pressure gas, but after heat exchange through the heat exchanger, the grade is reduced and used, only the amount of energy is used, and waste is wasted. quality of energy, resulting in substantial energy waste

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