CN203517753U - Full-process control system of constant-speed water feeding pump - Google Patents
Full-process control system of constant-speed water feeding pump Download PDFInfo
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- CN203517753U CN203517753U CN201320382216.XU CN201320382216U CN203517753U CN 203517753 U CN203517753 U CN 203517753U CN 201320382216 U CN201320382216 U CN 201320382216U CN 203517753 U CN203517753 U CN 203517753U
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- control valve
- control
- feedwater flow
- control system
- boiler
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Abstract
The utility model provides a full-process control system of a constant-speed water feeding pump, and belongs to the technical field of water feeding of boilers. The full-process control system comprises the constant-speed water feeding pump (4), a plurality of adjustment valves (1-3) and a scattering control system, wherein the constant-speed water feeding pump (4) is connected with multiple boiler water feeding master pipes to supply water to a boiler, the sizes of the multiple adjustment valves are different, the multiple adjustment valves are arranged on the multiple boiler water feeding master pipes, and the scattering control system is connected with the multiple adjustment valves and used for controlling the multiple adjustment valves. The technical scheme resolves the problems that the arrangement of a variable speed water feeding pump is large in occupied land, high in engineering cost and the like, and the full-process control system of the constant-speed water feeding pump has the advantages that the system is simplified and adjustment is fast in response.
Description
Technical field
The utility model belongs to boiler feedwater technical field, relates in particular to the omnidistance control system of a kind of constant speed feed pump.
Background technology
In engineering construction, the feed water system of boiler adopts Variable Speed Feedwater Pumps design to carry out the omnidistance feedwater automatic control of boiler more, and still, Variable Speed Feedwater Pumps arranges to have the shortcomings such as floor space is large, construction costs is high.In prior art, seldom use constant speed feed pump for boiler water supply, make everybody form a kind of erroneous picture, often think the omnidistance feedwater automatic control of the more difficult realization of constant speed feed pump, and in fact, constant speed feed pump can be realized omnidistance feedwater automatic control, and has the plurality of advantages such as good economy, higher operational reliability and floor space be little.
Utility model content
The purpose of this utility model is to provide a kind of constant speed feed pump omnidistance control system, adopt the Feedwater Whole Process Control System of constant speed pump operation to there is the advantages such as investment is little, floor space is little, system simplification, governing response is fast, regulation quality is good, overcome the variety of problems of using Variable Speed Feedwater Pumps to exist for boiler water supply.
For realizing above object, the utility model proposes the omnidistance control system of a kind of constant speed feed pump, this system comprises: constant speed feed pump, being connected to boiler feed main is boiler water supply; A plurality of control valves, the size specification of described a plurality of control valves is different, is separately positioned on a plurality of boiler feed mains; Scattered control system, is connected with described a plurality of control valves, for controlling described a plurality of control valve.
According to an aspect of the present utility model, wherein, described a plurality of control valve is three control valves, be respectively the first control valve, the second control valve and the 3rd control valve, wherein the maximum feedwater flow of the first control valve is less than the maximum feedwater flow of the second control valve, and the maximum feedwater flow of the second control valve is less than the maximum feedwater flow of the 3rd control valve.
According to an aspect of the present utility model, described system also comprises: a plurality of flowmeters, for detection of main feedwater flow and the main steam flow of boiler; And water-level gauge, for detection of the water level of boiler-steam dome; Wherein said scattered control system is connected with water-level gauge with described a plurality of flowmeters by wired or wireless connection.
According to an aspect of the present utility model, described scattered control system comprises microprocessor and for receiving the signal of the main feedwater flow of reflection, main steam flow and steam water-level that described a plurality of flowmeter and described water-level gauge send, wherein, the signal of reflection main steam flow is load signal; Described scattered control system is also for being sent to control valve control signal respectively described three control valves.
According to an aspect of the present utility model, described system also comprises: power meter, for detection of the power output of generator; Wherein said scattered control system is connected with described power meter by wired or wireless connection; Described scattered control system comprises microprocessor the signal of the main feedwater flow of reflection, main steam flow and steam water-level and the signal of the reflection generated output power that described power meter sends that for receiving described a plurality of flowmeter and described water-level gauge, send, wherein, the signal of reflection generated output power is load signal; Described scattered control system is also for being sent to control valve control signal respectively described three control valves.
According to an aspect of the present utility model, described constant speed feed pump is connected with high-pressure heater one end by boiler feed main, the high-pressure heater other end is connected with described three control valve one end respectively by three boiler feed mains, three the control valve other ends respectively boiler feed main by are separately connected with economizer one end, and the economizer other end is connected with drum.
According to an aspect of the present utility model, the maximum feedwater flow of described the first control valve is 30% total Feedwater Flow; The maximum feedwater flow of described the second control valve is 70% total Feedwater Flow; The maximum feedwater flow of described the 3rd control valve is 100% total Feedwater Flow.
As can be seen here, the water supply system that the omnidistance control system of constant speed feed pump the utility model proposes adopts the equipment such as constant speed pump, the first control valve, the second control valve and the 3rd control valve to form, by controlling three control valves, start by sequence, stop and automatically regulating, realize feedwater full process control.The omnidistance control system of described constant speed feed pump is a set of integral control system with order start and stop, adjusting automatically, interlocking and defencive function, and the stable operation of the power station unit of assurance employing constant speed feed pump also adapts to the needs that electric load changes.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the omnidistance control system of the constant speed feed pump that the utility model proposes;
Fig. 2 is the schematic diagram that omnidistance control system automatically adjusts.
The specific embodiment
The following stated is better embodiment of the present utility model, does not therefore limit protection domain of the present utility model.
Fig. 1 is the overall diagram of the omnidistance control system of the constant speed feed pump that the utility model proposes.As shown in Figure 1, constant speed feed pump 4 is connected with high-pressure heater 5 one end by feed main, high-pressure heater 5 other ends are connected with control valve 1, control valve 2, control valve 3 respectively by three feed mains, and control valve 1-3 passes through feed main and economizer 6 separately, and then is connected with drum 7.Wherein, the omnidistance control system of described constant speed feed pump mainly comprises constant speed feed pump, control valve 1, control valve 2 and control valve 3, on boiler main feed main, be respectively equipped with the different control valve of size specification 1, valve 2, valve 3, for unit, under different operating modes, regulate.When unit load raises gradually, feedwater adjusting switches to by the lower little valve of negotiability the large valve that negotiability is higher and controls, and little valve cuts out by certain speed, the large valve of originally cutting out drops into and is regulated simultaneously.When load lowers, large valve cuts out by certain speed, and the little valve of originally cutting out drops into and regulates.Wherein, by control valve 1(≤30% total Feedwater Flow, be the multipotency of feedwater flow of control valve 1 reach total Feedwater Flow 30%), control valve 2(>30% and≤70% total Feedwater Flow), control valve 3(>70% and≤100% total Feedwater Flow) start by sequence and stop realizing automatic adjusting confluent; Described startup and stop determining according to unit load.
The concrete control of control valve realizes by comprising the scattered control system (DCS) of the electronic components such as microprocessor, it receives the signal of reflection boiler drum level, main feedwater flow and main steam flow, and transmit control signal to control valve according to one or more in these three parameters, to control its unlatching or to close, thereby composition integral control system, globality is strong, and operation maintenance is convenient; Adopt digital controlly, precision is high, and system availability is high; There is the advantages such as investment is little, floor space is little, system simplification, governing response is fast, regulation quality is good, thereby guaranteed that employing constant speed pump realizes Feedwater Whole Process Control System, and guarantee safe, stable, the economical operation of power station unit, and can adapt to the needs that electric load changes.
For this reason, the omnidistance control system of constant speed feed pump the utility model proposes also comprises the flowmeter that detects respectively main feedwater flow and main steam flow, and the water-level gauge that detects boiler drum level, described flowmeter is connected with described scattered control system by wired or wireless connection with water-level gauge, sends the signal of reflection steam water-level, main feedwater flow and main steam flow to described scattered control system.Described scattered control system is connected with described control valve 1-3 by wired or wireless connection, to it, transmits control signal with the unlatching of by-pass valve control or closes.
Fig. 2 is the schematic diagram that omnidistance control system regulates automatically.As shown in Figure 2.When unit load changes, by one or more regulating command of feedwater flow regulation device (scattered control system) delivery valve 1-3, adjust immediately main feedwater flow, make boiler feedwater adapt to the needs of unit load, guarantee that steam water-level maintains in certain scope, simultaneously using main steam flow, main feedwater flow as feed-forward signal, deliver to feedwater flow regulation device, the flow of whole feedwater and steam water-level are coordinated mutually.For example, in the situation that load is low, only adopt the output of the Water Level Control of Steam control valve 1, when load increases, by the output of steam water-level, main steam flow and main feedwater flow control and regulation valve 2 or 3.Certainly, this concrete control device can change as required, for example, when load surpasses certain threshold value, can open valve 1 simultaneously, both or many persons in 2,3 also controls automatically to both or the many persons that open, certainly, valve 1-3 is only also example in the utility model, can meet actual needs with the valve of any amount.
Should note; the specific embodiment that the utility model proposes and application be the object for illustrating only;, as the restriction to the utility model protection domain, those skilled in the art can not modify to adapt to different demands to the specific embodiment of the present utility model.
Claims (7)
1. the omnidistance control system of constant speed feed pump, is characterized in that, described system comprises:
Constant speed feed pump, being connected to a plurality of boiler feed mains is boiler water supply;
A plurality of control valves, the size specification of described a plurality of control valves is different, is separately positioned on a plurality of boiler feed mains;
Scattered control system, is connected with described a plurality of control valves, for controlling described a plurality of control valve.
2. the system as claimed in claim 1, is characterized in that:
Described a plurality of control valve is three control valves, be respectively the first control valve, the second control valve and the 3rd control valve, wherein the maximum feedwater flow of the first control valve is less than the maximum feedwater flow of the second control valve, and the maximum feedwater flow of the second control valve is less than the maximum feedwater flow of the 3rd control valve.
3. system as claimed in claim 2, is characterized in that, described system also comprises:
A plurality of flowmeters, for detection of main feedwater flow and the main steam flow of boiler; And
Water-level gauge, for detection of the water level of boiler-steam dome;
Wherein said scattered control system is connected with water-level gauge with described a plurality of flowmeters by wired or wireless connection.
4. system as claimed in claim 3, is characterized in that:
Described scattered control system comprises microprocessor and for receiving the signal of the main feedwater flow of reflection, main steam flow and the steam water-level of described a plurality of flowmeter and the transmission of described water-level gauge, wherein, the signal of reflection main steam flow is load signal;
Described scattered control system is also for being sent to control valve control signal respectively described three control valves.
5. system as claimed in claim 3, is characterized in that, described system also comprises:
Power meter, for detection of the power output of generator;
Wherein said scattered control system is connected with described power meter by wired or wireless connection;
Described scattered control system comprises microprocessor the signal of the main feedwater flow of reflection, main steam flow and steam water-level and the signal of the reflection generated output power that described power meter sends that for receiving described a plurality of flowmeter and described water-level gauge, send, wherein, the signal of reflection generated output power is load signal;
Described scattered control system is also for being sent to control valve control signal respectively described three control valves.
6. system as claimed in claim 2, is characterized in that:
Described constant speed feed pump is connected with high-pressure heater one end by boiler feed main, the high-pressure heater other end is connected with described three control valve one end respectively by three boiler feed mains, three the control valve other ends respectively boiler feed main by are separately connected with economizer one end, and the economizer other end is connected with drum.
7. system as claimed in claim 2, is characterized in that:
The maximum feedwater flow of described the first control valve is 30% total Feedwater Flow;
The maximum feedwater flow of described the second control valve is 70% total Feedwater Flow;
The maximum feedwater flow of described the 3rd control valve is 100% total Feedwater Flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320382216.XU CN203517753U (en) | 2013-06-29 | 2013-06-29 | Full-process control system of constant-speed water feeding pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320382216.XU CN203517753U (en) | 2013-06-29 | 2013-06-29 | Full-process control system of constant-speed water feeding pump |
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| Publication Number | Publication Date |
|---|---|
| CN203517753U true CN203517753U (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320382216.XU Expired - Fee Related CN203517753U (en) | 2013-06-29 | 2013-06-29 | Full-process control system of constant-speed water feeding pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120637A (en) * | 2017-05-27 | 2017-09-01 | 广东粤电中山热电厂有限公司 | A kind of throttle type is fixed, the switching system and method for Variable Speed Feedwater Pumps |
| CN113757633A (en) * | 2021-09-09 | 2021-12-07 | 中广核工程有限公司 | Water level control method and device for steam generator of nuclear power plant and computer equipment |
-
2013
- 2013-06-29 CN CN201320382216.XU patent/CN203517753U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120637A (en) * | 2017-05-27 | 2017-09-01 | 广东粤电中山热电厂有限公司 | A kind of throttle type is fixed, the switching system and method for Variable Speed Feedwater Pumps |
| CN113757633A (en) * | 2021-09-09 | 2021-12-07 | 中广核工程有限公司 | Water level control method and device for steam generator of nuclear power plant and computer equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: INNER MONGOLIA ELECTRIC POWER SURVEY DESIGN INSTIT Free format text: FORMER NAME: INNER MONGOLIA ELECTRICAL POWER INVESTIGATE AND DESIGN INSTITUTE |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 010010 Hohhot, the Inner Mongolia Autonomous Region Tin Road, No. 209 Patentee after: INNER MONGOLIA POWER SURVEY & DESIGN INSTITUTE Co.,Ltd. Address before: 010010 Hohhot, the Inner Mongolia Autonomous Region Tin Road, No. 209 Patentee before: Inner Mongolia Electric Power Survey Design Institute |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 |
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| CF01 | Termination of patent right due to non-payment of annual fee |