Low-grade waste heat utilization and smoke CO2 capturing utilization method and system in natural gas distributed energy resource

A distributed energy and natural gas technology, applied in heating systems, heat recovery systems, energy-saving heating/cooling, etc., can solve problems such as economical applications, and achieve the effects of reducing emissions, reducing production energy consumption, and reducing emissions

Pending Publication Date: 2019-03-19
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Application Information

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Problems solved by technology

At present, in the world's advanced natural gas distributed energy, the utilization of waste heat is also in the stage of high-temperature waste heat util

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  • Low-grade waste heat utilization and smoke CO2 capturing utilization method and system in natural gas distributed energy resource
  • Low-grade waste heat utilization and smoke CO2 capturing utilization method and system in natural gas distributed energy resource

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Embodiment Construction

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0016] Example.

[0017] see figure 1 , in this embodiment, the utilization of low-grade waste heat and CO in flue gas can be realized in the natural gas distributed energy 2 The method of capture and utilization, its operation process is as follows: gas turbine 1 uses natural gas to generate electricity by burning natural gas to generate high-temperature flue gas, high-temperature flue gas enters waste heat boiler 2 to heat boiler water, and generates high-temperature steam, high-temperature steam enters turbogenerator set 5 to drive steam turbine and The generator generates electricity, and at the same time, the steam turbine generator set 5 is extracted to supply the steam demand users. The high-temperature flue...

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Abstract

The invention relates to a low-grade waste heat utilization and smoke CO2 capturing utilization method and system in natural gas distributed energy resource. Currently, waste heat utilization is generally in a high-temperature waste heat utilization stage, and utilization of low-temperature low-grade waste heat is not applied to a distributed energy resource system. A gas turbine performs combustion and power generation, high-temperature smoke is generated and enters a waste heat boiler to heat boiler water, high-temperature steam is generated and enters a steam turbine generator unit to pusha steam turbine and a power generator to generate power, meanwhile steam extraction is performed on the steam turbine generator unit so as to supply steam to a demanding user, the high-temperature smoke generated by the gas turbine forms low-temperature smoke through the waste heat boiler, a heat pump unit recycles heat in the low-temperature smoke so as to supply heat, the smoke temperature is further lowered, cooled smoke enters a CO2 capturing device for CO2 capturing, and captured CO2 is used for displacement of reservoir oil of an oil field . By means of the method and the system, low-grade waste heat utilization of the distributed energy resource can be improved, and meanwhile energy consumption in a CO2 capturing utilization process is reduced.

Description

technical field [0001] The invention relates to the utilization of low-grade waste heat and CO in flue gas in natural gas distributed energy 2 The method and system for capture and utilization belong to the field of distributed energy application technology. Background technique [0002] In some industrial parks, there are industries with large demand for steam, such as oilfield mining industry and biopharmaceuticals, and there is a large amount of CO produced by oilfield flooding. 2 need. The natural gas distributed energy station can not only meet the steam load demand, but also contains a large amount of high concentration of CO in the flue gas 2 , which captures the CO 2 It has good economy and can also reduce the CO of distributed energy stations 2 emission. The exhaust gas temperature of the natural gas distributed energy system is between 90°C and 120°C, and the CO 2 In the capture device, the flue gas needs to be cooled first, and then the CO 2 Absorption and ...

Claims

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Application Information

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IPC IPC(8): F01K23/10E21B43/16F24D15/04
CPCE21B43/164F01K23/10F24D15/04Y02B30/52Y02P90/70
Inventor 柯冬冬周宇昊谢玉荣王世朋梁晶
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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