Biomass combined heat and power generation system capable of recycling steam exhaust and smoke waste heat at the same time

A technology for co-generation of heat and power and waste heat from flue gas is applied in heat recovery systems, heating systems, and hot water central heating systems. The effect of reducing water consumption and reducing losses

Pending Publication Date: 2019-04-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem of waste heat waste in the existing biomass cogeneration technology, and propose a biomass cogeneration system that can recover waste steam and flue gas waste heat at the same time

Method used

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  • Biomass combined heat and power generation system capable of recycling steam exhaust and smoke waste heat at the same time
  • Biomass combined heat and power generation system capable of recycling steam exhaust and smoke waste heat at the same time
  • Biomass combined heat and power generation system capable of recycling steam exhaust and smoke waste heat at the same time

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Example 1: In the factory, flue gas spray water heat exchanger and spent steam heat exchanger are used to heat the hot network water in a cascade, and an electric heat pump is used at the end to reduce the temperature of the return water, and the basic process of supplying heat to users after mixing with water

[0035] A biomass cogeneration system that can simultaneously recover spent steam and flue gas waste heat according to Embodiment 1 of the present invention, such as figure 1 As shown, the system includes biomass boiler 1, steam turbine 2, spent steam heat exchanger 3, condenser 4, cooling tower 5, boiler feed water heater 6, flue gas emission reduction and waste heat recovery integrated unit 7, flue gas injection Water shower heat exchanger 8, chimney 9, power grid 19, terminal electric heat pump 10, user heat exchanger 11 and connecting pipelines and valves; flue gas emission reduction and waste heat recovery integrated unit 7 includes desulfurization tower 7a a...

Embodiment 2

[0042] Example 2: The process of using the spent steam heat exchanger and the electric heat pump in the plant to heat the hot network water and directly supply it to the terminal heat users

[0043] A biomass cogeneration system that can simultaneously recover spent steam and flue gas waste heat according to the second embodiment of the present invention, such as figure 2 As shown, the system includes biomass boiler 1, steam turbine 2, spent steam heat exchanger 3, condenser 4, cooling tower 5, boiler feed water heater 6, flue gas emission reduction and waste heat recovery integrated unit 7, chimney 9, The power grid 19, the electric heat pump 20 of the power plant, the user heat exchanger 11 and the connecting pipelines and valves; the integrated unit 7 of flue gas emission reduction and waste heat recovery includes a desulfurization tower 7a and a waste heat recovery tower 7b; the connection relationship of each equipment is:

[0044]The high-temperature steam outlet of bio...

Embodiment 3

[0050] Example 3: The process of using the flue gas spray water heat exchanger, the spent steam heat exchanger and the extraction steam heater in the factory to heat the hot network water, and the end thermal station adopts the absorption heat exchange unit to supply the heat users through the secondary network

[0051] A biomass cogeneration system that can simultaneously recover spent steam and flue gas waste heat according to Embodiment 3 of the present invention, such as image 3 As shown, the system includes biomass boiler 1, steam turbine 2, spent steam heat exchanger 3, condenser 4, cooling tower 5, boiler feed water heater 6, flue gas emission reduction and waste heat recovery integrated unit 7, flue gas injection Water shower heat exchanger 8, chimney 9, power grid 19, extraction steam heater 21, absorption heat exchange unit 22, user heat exchanger 11 and connecting pipelines and valves; flue gas emission reduction and waste heat recovery integrated unit 7 includes de...

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Abstract

The invention provides a biomass combined heat and power generation system capable of recycling steam exhaust and smoke waste heat at the same time, and belongs to the technical field of biomass energy use. The system comprises a biomass boiler, a steam turbine, a steam exhaust heat exchanger, a condenser, a cooling tower, a boiler water supply heater, a smoke emission reduction and waste heat recycling integrated unit, a smoke spraying water heat exchanger, a chimney, a power grid, an end electric heat pump, a user heat exchanger, a connecting pipeline and a valve. The smoke emission reduction and waste heat recycling integrated unit comprises a desulfurizing tower and a waste heat recycling tower; the electric heat pump mixed water heat supply manner is adopted on the user side to reducethe heat supply network water returning temperature, through direct heat exchange, smoke condensation latent heat and steam exhaust waste heat in a power plant can be recycled in a gradient manner, the heat supply capacity of a biomass power plant can be increased, and the optimal biomass energy comprehensive use efficiency is obtained.

Description

technical field [0001] The invention provides a biomass heat and power co-generation system capable of simultaneously recovering spent steam and flue gas waste heat, and belongs to the technical field of biomass energy utilization. Background technique [0002] As an important part of renewable energy, biomass is of great significance for ensuring energy security and reducing greenhouse gas carbon emissions. There were 747 biomass power generation projects in my country in 2017, with a cumulative installed capacity of 14.762 million kW, and about 22 million tons of coal-fired power generation. Material power generation has broad prospects for development. [0003] However, due to the restriction of uneven distribution of biomass resources and the radius of raw material collection, biomass power plants have high power generation costs and can only rely on subsidies to maintain operation. The conventional biomass cogeneration provides central heating while generating electric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K11/02F01K7/38F01K7/44F01K27/00F23J15/02F23J15/06F24D3/18
CPCF01K7/38F01K7/44F01K11/02F01K27/00F23J15/02F23J15/06F24D3/18Y02B30/52Y02E20/14Y02E20/30Y02E50/10
Inventor 单明孙涛郑忠海荣杏邓梦思李鹏超杨旭东
Owner TSINGHUA UNIV
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