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Large-temperature-difference efficient heat supply system of gas-fired boiler

A gas-fired boiler and heating system technology applied in the energy field to achieve long-distance efficient heating, eliminate winter smog, and improve energy utilization efficiency

Active Publication Date: 2014-08-20
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the regional heating system of gas-fired boiler rooms in northern cities and towns in my country, the present invention provides a gas-fired boiler with large temperature difference and high-efficiency heating system to improve the heat transfer capacity of the existing primary heating network and recycle the waste heat of gas-fired boiler flue gas , thereby reducing the fossil energy consumption of the heating system

Method used

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  • Large-temperature-difference efficient heat supply system of gas-fired boiler

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 As shown, the large temperature difference high-efficiency heating system of the gas boiler of the present invention is composed of the first heating station PHS, the primary side pipeline PHN, the heat station SHS, the secondary side pipeline SHN, the tertiary side pipeline THN and other accessories. Among them, the first heating station PHS is composed of gas boiler NGB, partition wall heat exchanger IHE, contact heat exchanger DHE, heat pump HP, circulation pump, connecting pipelines and other accessories, and the thermal station is composed of large temperature difference heat exchange unit LTHE, Circulation pump, connecting pipeline and other accessories.

[0042] The flue gas from the gas-fired boiler enters the partition heat exchanger IHE and the contact heat exchanger DHE in turn to be cooled down, and then is discharged into the atmosphere through the chimney.

[0043] When the unit is running, the primary side high-temperature heat medium pr...

Embodiment 2

[0048] Such as image 3 As shown, the gas-fired boiler large temperature difference high-efficiency heating system of the present invention is composed of the first heating station PHS, the primary side pipeline PHN, the heat station SHS, the secondary side pipeline SHN and other accessories. Among them, the first heating station PHS is composed of gas boiler NGB, partition wall heat exchanger IHE, circulation pump, connecting pipeline and other accessories, and the thermal station is composed of large temperature difference heat exchange unit LTHE, circulation pump, connecting pipeline and other accessories .

[0049] When the unit is running, the primary side high-temperature heat medium process: the primary side high-temperature heat medium from the first heating station PHS is transported and distributed to each heat station SHS through the primary side pipeline PHN, and is transferred to the secondary side in the large temperature difference heat exchange unit LTHE. Afte...

Embodiment 3

[0052] The large temperature difference heat exchange unit can adopt, adsorption heat exchange unit, compression heat exchange unit, jet heat exchange unit or absorption heat exchange unit.

[0053] Such as Figure 4 As shown, the compression heat exchange unit is composed of a compression heat pump CHP and a water-water heat exchanger WHE. The high-temperature water supply on the primary side enters the water-water heat exchanger WHE and the evaporator E of the compression heat pump CHP in turn to realize heat release step by step. , cooling; the secondary side return water or respectively enters the water-water heat exchanger WHE, and the condenser C of the compression heat pump CHP is heated up.

[0054] Such as Figure 5 As shown, the compression heat exchange unit is composed of two compression heat pumps CHP and a water-to-water heat exchanger WHE. The high-temperature water supply on the primary side enters the water-to-water heat exchanger WHE, the evaporators E1 and ...

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Abstract

The invention relates to a clean and efficient large-temperature-difference efficient heat supply system of a gas-fired boiler and belongs to the technical field of energy resources. The large-temperature-difference efficient heat supply system of the gas-fired boiler consists of the gas-fired boiler, a dividing wall type heat exchanger, a direct contact type heat exchanger, a heat pump, a large-temperature-difference heat exchanger unit, a circulating pump, a connecting pipeline and other accessories. The connecting pipeline is divided into a primary side pipeline, a secondary side pipeline and a tertiary side pipeline. The system is a clean and efficient heat supply system, can achieve large-temperature-difference remote heat supply, adopts the heat exchangers and a heat pump technology to efficiently recover smoke waste heat of the gas-fired boiler, improves the energy utilization efficiency, facilitates elimination of a northern-area haze phenomenon in winter through popularization and application, improves the urban atmospheric environmental quality and also facilitates achievement of the energy-saving and emission reduction purposes.

Description

technical field [0001] The invention relates to a clean and high-efficiency gas-fired boiler with large temperature difference and high-efficiency heating system, which belongs to the field of energy technology. Background technique [0002] With the rapid development of urbanization, the heating load demand of cities and towns in northern my country has increased sharply, and the heating density and heating radius of the central heating system have become larger and larger. Heating energy consumption in northern cities and towns accounts for about 60% of the total energy consumption of urban buildings in the country, which is an important part of building energy conservation. However, due to environmental protection and winter smog control requirements, northern cities and towns have implemented “coal-to-gas” heating systems, and a large number of gas-fired boilers have been put into use one after another. The temperature of gas-fired boiler exhaust flue gas is 150°C, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24D3/02F24D3/10F24D3/18F24D19/00
Inventor 孙方田
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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