Multi-source complementary heat supply system and method for gradient utilization of energy

A heating system and cascade technology, applied in the field of multi-source complementary heating systems, can solve problems such as poor output safety and stability, low energy utilization, resource waste, etc., to improve linkage coupling, reduce heating network imbalance, The effect of increasing the heating capacity

Pending Publication Date: 2021-06-11
联美智慧能源科技(沈阳)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, most central heating systems only use a single heat source, and there are many limiting factors. Once a failure occurs and there is no alternative heat source, the heating system will be paralyzed, and the output safety and stability will be poor.
Moreover, the traditional heating system uses coal as the main fuel, and coal combustion will bring serious pollution problems and cause irreversible impacts on the environment
In addition, the energy utilization rate of the existing heating system is low, which is easy to cause waste of resources
[0003] In order to solve the above problems, clean energy such as wind energy and solar energy can be reasonably introduced into the field of centralized heating to form a form of multi-source complementary heating. It is difficult to achieve uniformity, and it is difficult to ensure that the water supply temperature of the heating network is stable and meets the heating demand; moreover, the formed heating system only simply connects several heating methods together, and the energy utilization rate is low, which still results in low energy utilization rate , waste of resources, and the problem of environmental pollution cannot be significantly improved

Method used

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  • Multi-source complementary heat supply system and method for gradient utilization of energy

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Embodiment 1

[0077] Embodiment 1 of the present invention discloses a multi-source complementary heat supply system for cascaded utilization of energy, including a coal-fired steam boiler, a steam turbine, a waste steam waste heat recovery mechanism, a primary flue gas waste heat recovery mechanism, a secondary flue gas waste heat recovery mechanism, Sewage waste heat recovery mechanism, near-end network circulation mechanism, remote primary network circulation mechanism, remote secondary network circulation mechanism and gas boiler;

[0078] The high-temperature steam outlet of the coal-fired steam boiler is connected to the steam turbine, and the flue gas outlet is connected to the first-level flue gas waste heat recovery mechanism and the second-level flue gas waste heat recovery mechanism through the flue;

[0079] Among them, the waste steam heat recovery mechanism includes a steam pipe, a steam-water heat exchanger and a condensate water pipe; the steam pipe is connected to the steam ...

Embodiment 2

[0101] Embodiment 2 of the present invention discloses a multi-source complementary heating method for cascaded energy utilization. Using the multi-source complementary heating system for cascaded energy utilization disclosed in Embodiment 1 includes the following steps:

[0102] (1) The high-pressure steam generated by the coal-fired steam boiler is input into the steam turbine to do work, and the low-temperature exhaust steam is discharged. The low-temperature exhaust steam is transported to the steam-water heat exchanger through the steam pipe for heat exchange, and the condensed water is returned to the coal-fired steam boiler through the condensate pipe for heating; Among them, the pressure of high-pressure steam is 3.11-3.96Mpa, the temperature is 430-480°C, the pressure of low-temperature exhaust steam is 0.12Mpa, and the temperature is 190°C

[0103] (2) The flue gas produced by the coal combustion process in the coal-fired steam boiler is transported to the first-level...

Embodiment 3

[0112] Embodiment 3 of the present invention takes the heating system of a heating company in Shenyang as an example. The company’s heat source is 60MW coal-fired steam boiler and 20MW gas boiler, the heating area is 1 million square meters, and the indoor standard temperature is 18°C. A heat supply method for cascade utilization of energy, comprising the steps of:

[0113] (1) The high-pressure steam generated by the coal-fired steam boiler is input into the steam turbine to do work, and the low-temperature exhaust steam is discharged. The low-temperature exhaust steam is transported to the steam-water heat exchanger through the steam pipe for heat exchange, and the condensed water is returned to the coal-fired steam boiler through the condensate pipe for heating; Among them, the pressure of high-pressure steam is 3.12Mpa and the temperature is 480°C, the pressure of low-temperature exhaust steam is 0.12Mpa and the temperature is 190°C;

[0114] (2) The flue gas produced duri...

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Abstract

The invention discloses a multi-source complementary heat supply system for gradient utilization of energy. The multi-source complementary heat supply system comprises a coal-fired steam boiler, a steam turbine, a dead steam waste heat recovery mechanism, a first-stage flue gas waste heat recovery mechanism, a second-stage flue gas waste heat recovery mechanism, a sewage waste heat recovery mechanism, a near-end network circulation mechanism, a far-end first-stage network circulation mechanism, a far-end network second-stage circulation mechanism and a gas-fired boiler. The invention also discloses a multi-source complementary heat supply method for gradient utilization of energy. By the adoption of the multi-source complementary heat supply system for gradient utilization of energy, heat loss in the heat conveying process can be effectively reduced, equipment investment is reduced, and the ideal effect of excellent energy and excellent use is achieved; gradient utilization of energy is realized on the basis of ensuring that the indoor temperature of a heat consumer is appropriate, and pollution to the environment is reduced.

Description

technical field [0001] The invention relates to the technical field of new energy centralized heating, and more specifically relates to a multi-source complementary heating system and method for cascaded utilization of energy. Background technique [0002] At present, most central heating systems only use a single heat source, and there are many limiting factors. Once a failure occurs and there is no alternative heat source, the heating system will be paralyzed, and the output safety and stability will be poor. Moreover, the traditional heating system uses coal as the main fuel, and coal combustion will cause serious pollution problems and cause irreversible impacts on the environment. In addition, the energy utilization rate of the existing heating system is low, which is easy to cause waste of resources. [0003] In order to solve the above problems, clean energy such as wind energy and solar energy can be reasonably introduced into the field of centralized heating to for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24D3/10F24D3/18F24D3/02
CPCF24D3/02F24D3/10F24D3/18F24D2200/18Y02B30/12
Inventor 胡鹏龙李卓辰武海滨边福忠
Owner 联美智慧能源科技(沈阳)有限公司
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