[특허]Control system for allocating steam flow through elements

ENERO INVENTIONS INC

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Control system for allocating steam flow through elements

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F22B-035/00 F01K-013/02
출원번호	US-0398640 (2012-05-04)
등록번호	US-10012380 (2018-07-03)
국제출원번호	PCT/CA2012/050293 (2012-05-04)
§371/§102 date	20141103 (20141103)
국제공개번호	WO2013/163722 (2013-11-07)
발명자 / 주소	Janvier, Benoît
출원인 / 주소	ENERO INVENTIONS INC
대리인 / 주소	Norton Rose Fulbright Canada LLP
인용정보	피인용 횟수 : 0 인용 특허 : 9

초록

There is described herein a method and system for dispatching a single steam flow command to multiple control elements by prioritizing control elements and measuring responsiveness and availability of the control elements using feedbacks. The dispatched single steam flow command may then be adjusted as a function of the responsiveness of each control element.

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1. A control system for allocating a flow of steam from or to a steam header having a first pressure level to or from a plurality of pressure adjusting devices, the system comprising a pressure unit adapted to measure the first pressure level in the steam header, determine a difference between the first pressure level as measured and a desired pressure level, and generate a demand signal representative of a steam flow demand needed to adjust the pressure level in the steam header to correspond to the desired pressure level;at least one status monitoring unit coupled to the plurality of pressure adjusting devices for monitoring an output flow thereof; and a dispatching device having at least one input coupled to the pressure unit and to the at least one status monitoring unit, and at least one output coupled to the plurality of pressure adjusting devices, the dispatching device adapted to:receive the demand signal from the pressure unit;allocate the flow of steam among the plurality of pressure adjusting devices from the steam header as a function of the demand signal and in accordance with a priority scheme;receive from the status monitoring unit at least one feedback signal representative of a response of the plurality of pressure adjusting devices to allocation of the flow of steam; andadjust allocation of the flow of steam on the basis of the at least one feedback signal. 2. The system of claim 1, wherein the pressure unit is adapted to generate the demand signal as a difference between a preceding demand and a current demand. 3. The system of claim 1, wherein the at least one status monitoring unit comprises a status monitoring unit for each of the plurality of pressure adjusting devices. 4. The system of claim 1, wherein the dispatching device is adapted to compare the output flow of each one of the plurality of pressure adjusting devices to the flow of steam allocated to each one of the plurality of pressure adjusting devices to assess the response of each one of the plurality of pressure adjusting devices. 5. The system of claim 1, wherein the dispatching device comprises at least one first input coupled to the pressure unit and at least one second input coupled to the at least one status monitoring unit. 6. The system of claim 1, wherein the dispatching device comprises at least one output coupled to each one of the plurality of pressure adjusting devices. 7. The system of claim 1, wherein the dispatching device is adapted to allocate the flow of steam amongst at least one of a pressure control valve, a steam turbine, a condenser, a boiler, and a compressor. 8. The system of claim 1, wherein the dispatching device is adapted to allocate the flow of steam among the plurality of pressure adjusting devices using the priority scheme while taking into account a manual setting of the flow of steam through at least one of the plurality of pressure adjusting devices. 9. The system of claim 8, wherein the manual setting corresponds to a fixed amount of steam set to flow through the at least one of the plurality of pressure adjusting devices. 10. The system of claim 1, wherein the dispatching device is adapted to allocate the flow of steam in accordance with the priority scheme by taking into account a steam flow capacity of at least one of the pressure adjusting devices. 11. The system of claim 1, wherein the dispatching device is adapted to allocate the flow of steam in accordance with the priority scheme by taking into account at least one economic factor. 12. The system of claim 11, wherein the at least one economic factor comprises at least one of a selling price of electricity and a cost of burning fuel. 13. The system of claim 1, wherein the dispatching device allocates the flow of steam by considering pre-assigned priorities, steam flow capacity, manual settings, economic factors, and malfunctioning equipment, and adjusts allocation as a function of responsiveness of the pressure adjusting devices. 14. A method for allocating a flow of steam from or to a steam header having a first pressure level to or from a plurality of pressure adjusting devices, the method comprising: measuring the first pressure level in the steam header;determining a difference between the first pressure level as measured and a desired pressure level;generating a demand signal representative of a steam flow demand needed to adjust the pressure level in the steam header to correspond to the desired pressure level;allocating the flow of steam among the plurality of pressure adjusting devices from the steam header as a function of the demand signal and in accordance with a priority scheme;monitoring a response of the plurality of pressure adjusting devices to allocation of the flow of steam; andadjusting the allocation of the flow of steam on the basis of the response as monitored. 15. The method of claim 14, wherein the demand signal is generated as a difference between a preceding demand and a current demand. 16. The method of claim 14, wherein monitoring comprises monitoring each of the plurality of pressure adjusting devices independently. 17. The method of claim 14, wherein monitoring comprises measuring the output flow downstream from at least one of the plurality of pressure adjusting devices. 18. The method of claim 14, wherein monitoring an output flow comprises comparing the output flow of each one of the plurality of pressure adjusting devices to the flow of steam allocated to each one of the plurality of pressure adjusting devices to assess the response of each one of the plurality of pressure adjusting devices. 19. The method of claim 14, wherein allocating the flow of steam comprises allocating amongst at least one of a pressure valve and a steam turbine. 20. The method of claim 14, wherein allocating the flow of steam comprises allocating among the plurality of pressure adjusting devices using the priority scheme while taking into account a manual setting of the flow of steam through at least one of the plurality of pressure adjusting devices. 21. The method of claim 20, wherein the manual setting corresponds to a fixed amount of steam set to flow through the at least one of the plurality of pressure adjusting devices. 22. The method of claim 14, wherein allocating comprises allocating the flow of steam in accordance with the priority scheme by taking into account a steam flow capacity of at least one of the pressure adjusting devices. 23. The method of claim 14, wherein allocating comprises allocating the flow of steam in accordance with the priority scheme by taking into account at least one economic factor. 24. The method of claim 23, wherein the at least one economic factor comprises at least one of a selling price of electricity and a cost of burning fuel. 25. The method of claim 14, wherein allocating comprises allocates the flow of steam by considering pre-assigned priorities, steam flow capacity, manual settings, economic factors, and malfunctioning equipment, and adjusts allocation as a function of responsiveness of the pressure adjusting devices.

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Control system for allocating steam flow through elements

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Control system for allocating steam flow through elements

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