CN211902835U - Water spraying and temperature reducing system of platen superheater - Google Patents
Water spraying and temperature reducing system of platen superheater Download PDFInfo
- Publication number
- CN211902835U CN211902835U CN201922104107.1U CN201922104107U CN211902835U CN 211902835 U CN211902835 U CN 211902835U CN 201922104107 U CN201922104107 U CN 201922104107U CN 211902835 U CN211902835 U CN 211902835U
- Authority
- CN
- China
- Prior art keywords
- supply pipeline
- water supply
- water
- main
- electromagnetic valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The utility model discloses a screen superheater water spray temperature reduction system in the field of power plants, which comprises a Venturi tube, a temperature reduction nozzle arranged inside the Venturi tube, a pressure transmitter and a temperature detection element, and also comprises a water supply pipeline connected with the temperature reduction nozzle, the water supply pipeline is connected with an external water inlet pipeline through a main water supply pipeline, a filter, a water pump and a main electromagnetic valve are sequentially arranged on the main water supply pipeline along the flow direction of soft water entering the temperature reduction nozzle, one section of the main electromagnetic valve arranged on the main water supply pipeline is connected with an auxiliary water supply pipeline, a precise electromagnetic valve is arranged on the auxiliary water supply pipeline, the pressure transmitter and the temperature detection element are connected with an external PLC control system in an input way, the PLC control system outputs and is connected with a safety electromagnetic valve, the water pump, the main electromagnetic valve, the precise electromagnetic valve and an alarm, the wall temperature of, the frequency of the water pump is automatically adjusted through real-time pressure and temperature monitoring, and the operation difficulty of personnel is reduced.
Description
Technical Field
The utility model relates to a power plant technical field specifically is screen over heater water spray cooling system.
Background
The platen superheater is also commonly called a semi-radiation superheater and refers to a heating surface which is arranged at the upper part of a hearth or a smoke window at the outlet of the hearth and is used for receiving direct radiation heat in the furnace and absorbing convection heat of smoke. The water spraying desuperheater is a device which directly sprays atomized cooling water into the temperature-adjusting steam to evaporate the atomized cooling water into steam and well mixes the steam with the temperature-adjusting steam to reduce the temperature of the temperature-adjusting steam.
Modern power engineering and heat energy technology require a high-temperature-high-pressure boiler to generate superheated steam with extremely high superheat degree, and in order to guarantee the service life of a pipeline and a valve, the high-pressure superheated steam needs to be subjected to temperature reduction and pressure reduction simultaneously. However, the temperature and the air pressure of steam required by different process flow equipment are different, meanwhile, in the starting and stopping processes of a unit, the steam flow is small, the initial flow (usually about 10 t/h) can cause the wall temperature of a superheater to fluctuate greatly when a desuperheating water regulating valve is opened, and because the expansion coefficient of oxide skin on the inner wall of the superheater tube is different from that of metal, when the temperature changes greatly, the oxide skin is separated from the tube wall, the fallen oxide skin can block the tube, so that the cooling medium is reduced, and the overheating strength of the tube is reduced and burst. Therefore how to guarantee the transport of high saturation steam, and start, stop to avoid the wall temperature to fluctuate the condition to take place by a wide margin among the transportation process, utility model designs a platen superheater water spray desuperheating system to solve the above-mentioned problem
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a platen superheater water spray cooling system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the screen superheater water spray temperature reduction system comprises a Venturi tube, a temperature reduction nozzle, a pressure transmitter and a temperature detection element which are arranged in the Venturi tube, and a water supply pipeline connected with the temperature reduction nozzle, the water supply pipeline is connected with an external water inlet pipeline through a main water supply pipeline, a filter, a water pump and a main electromagnetic valve are sequentially arranged on the main water supply pipeline along the flow direction of soft water entering the temperature-reducing nozzle, one section of the main water supply pipeline provided with the main electromagnetic valve is connected with an auxiliary water supply pipeline, two ends of the auxiliary water supply pipeline are respectively positioned between the water pump and the connecting end of the safety water supply pipeline and the water supply pipeline, the auxiliary water supply pipeline is provided with a precise electromagnetic valve, the pressure transmitter and the temperature detection element are connected with the input of an external PLC control system, and the output of the PLC control system is connected with a safety electromagnetic valve, a water pump, a main electromagnetic valve, a precision electromagnetic valve and an alarm.
Preferably, the venturi tube is made of 12Cr1 MoV.
Preferably, the temperature detection element is a platinum thermistor.
Preferably, the water pump is a variable frequency water pump.
Preferably, a safe water supply pipeline connected with the main water supply pipeline in parallel through a tee joint is further arranged between the water supply pipeline and the water inlet pipeline, and a safe electromagnetic valve is installed on the safe water supply pipeline
Preferably, the precision of the precision electromagnetic valve is not lower than 0.5 t/h.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the auxiliary water supply pipeline is connected in parallel with the main water supply pipeline, the precise electromagnetic valve is additionally arranged, and in the process of starting or stopping the unit, the main electromagnetic valve and the precise electromagnetic valve are remotely controlled, so that the requirement of regulating the steam temperature of the unit superheater is met, the wall temperature of the superheater cannot greatly fluctuate, the accident that an oxide skin falls off in a large area when the unit is started or stopped is reduced, the steam temperature can be conveniently regulated by operation control, the temperature reduction water consumption of the superheater can be reduced, and the energy saving and consumption reduction of the unit are made contribution;
2. the steam pressure and the temperature are monitored in real time through the pressure transmitter and the temperature detection element, the variable frequency water pump is controlled in real time through the PLC control system to be regulated, the frequency of the water pump is automatically regulated through real-time pressure and temperature monitoring, the operation difficulty of personnel is reduced, and the electromagnetic valve and the water pump on the site can be automatically regulated in a central control room through remote control due to severe site environment, so that the environment and the labor intensity of site operators are improved;
3. when can prevent through increasing safe supply channel that the water pump from breaking down, supply water through safe supply channel, do not influence the use that normal water spray desuperheated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a control schematic block diagram of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a venturi tube; 2. a temperature reducing nozzle; 3. a pressure transmitter; 4. a temperature detection element; 5. a water supply line; 6. a main water supply line; 7. a safe water supply line; 8. a water inlet pipe; 9. a safety solenoid valve; 10. A filter; 11. a water pump; 12. a main electromagnetic valve; 13. a tee joint; 14. an auxiliary water supply pipeline; 15. a precision solenoid valve; 16. a PLC control system; 17. an alarm.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a screen superheater water spray temperature reduction system comprises a Venturi tube 1, a temperature reduction nozzle 2, a pressure transmitter 3 and a temperature detection element 4 which are arranged inside the Venturi tube 1, and further comprises a water supply pipeline 5 connected with the temperature reduction nozzle 2, water is supplied through the temperature reduction nozzle 2 on the water supply pipeline 5, the temperature reduction of steam is realized through the temperature reduction nozzle 2, the water supply pipeline 5 is connected with an external water inlet pipeline 8 through a main water supply pipeline 6, a filter 10, a water pump 11 and a main electromagnetic valve 12 are sequentially arranged on the main water supply pipeline 6 along the flowing direction of soft water entering the temperature reduction nozzle 2, the soft water can be prevented from scaling after being used for a long time, the problem of poor atomization effect is caused, one section of the main water supply pipeline 6 provided with the main electromagnetic valve 12 is connected with an auxiliary water supply pipeline 14, and the two ends of the auxiliary water supply pipeline 14 are respectively positioned between the connecting ends of the water pump 11 and, install accurate solenoid valve 15 on the supplementary water supply line 14, can high accuracy adjust the governing valve of reducing temperature discharge for the reducing temperature discharge that the control unit opened and stops the in-process, in order to avoid adopting main regulating valve 3 to be the over-large over heater inner wall cinder that arouses of flow drops. Pressure transmitter 3 and temperature detect element 4 and 16 input connection of outside PLC control system can carry out real-time supervision to the inside pressure of venturi 1 and temperature through pressure transmitter 3 and temperature detect element 4 to carry out data acquisition, processing through outside PLC control system 16, PLC control system 16 output connection safety solenoid valve 9, water pump 11, main solenoid valve 12, accurate solenoid valve 15 and alarm 17, then PLC control system 16 sends out the instruction to safety solenoid valve 9, water pump 11, main solenoid valve 12, accurate solenoid valve 15 and alarm 17 according to the data that detect.
Wherein, the venturi tube 1 is made of 12Cr1MoV material. The temperature detection element 4 employs a platinum thermistor. The water pump 11 is a variable frequency water pump. Still be equipped with between water supply pipeline 5 and the inlet channel 8 and connect in parallel the safe water supply pipeline 7 with main water supply pipeline 6 through tee bend 13, install safe solenoid valve 9 on the safe water supply pipeline 7, when can prevent water pump 11 trouble through increasing safe water supply pipeline 7, supply water through safe water supply pipeline 7, do not influence the use of normal water spray cooling. The precision of the precision electromagnetic valve 15 is not lower than 0.5 t/h.
The specific working principle is as follows:
when the device is used, in the process of starting the unit or stopping the unit, the main electromagnetic valve 12 and the precision electromagnetic valve 15 are controlled by the PLC control system, the main electromagnetic valve 12 is closed, the precision electromagnetic valve 15 is opened, soft water sequentially passes through the filter 10, the water pump 11, the auxiliary water supply pipeline 14 and the water supply pipeline through the water inlet pipeline 8 and enters the temperature reduction nozzle 2 in the Venturi tube 1, the steam temperature in the superheater is controlled by adjusting the precision electromagnetic valve 15, after the load of the unit is increased and the steam flow needs to be increased, the precision electromagnetic valve 15 is closed, the main electromagnetic valve 12 is started, the steam temperature is controlled by adjusting the main electromagnetic valve 12, the requirement of the superheater for adjusting the steam temperature of the unit can be met, the wall temperature of the superheater cannot fluctuate greatly, and the large-area desquamation accident; the high-precision bypass regulating valve is used for regulating the steam temperature during starting and stopping, the steam temperature is convenient to operate, control and regulate, the water consumption of the superheater desuperheating water can be reduced, and the contribution to energy conservation and consumption reduction of the unit is made.
During the use process, the pressure transmitter 3 can detect the pressure P value of the steam, and the PLC control system 16 can automatically calculate the saturation temperature T0 corresponding to the pressure P value; the T-T0 value is controlled within a certain range by comparing with the value T detected by the temperature detecting element 4, if the steam superheat degree is high by exceeding the preset threshold value, the frequency of the water pump 11 can be controlled, namely, the water injection quantity is increased, otherwise, the frequency of the water pump 11 is reduced, namely, the water injection quantity is reduced. Through real-time pressure and temperature monitoring, the frequency of automatically regulated water pump has reduced personnel's the operation degree of difficulty, because site environment is abominable, can just can carry out automatically regulated to on-the-spot solenoid valve and water pump 11 in the central control room through remote control, improved site operation personnel environment and intensity of labour.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. Screen type over heater water spray cooling system, include venturi (1) and install in inside temperature reduction nozzle (2), pressure transmitter (3) and temperature detect element (4) of venturi (1), its characterized in that: still include water supply pipeline (5) that is connected with attemperation nozzle (2), water supply pipeline (5) are connected with outside inlet channel (8) through main water supply pipeline (6), filter (10), water pump (11) and main solenoid valve (12) are installed in proper order to the flow direction that enters into attemperation nozzle (2) along soft water on main water supply pipeline (6), one section that main solenoid valve (12) were installed in main water supply pipeline (6) is connected with subsidiary water supply pipeline (14), the both ends of assisting water supply pipeline (14) are located respectively between water pump (11) and safe water supply pipeline (7) and water supply pipeline (5) link, install accurate solenoid valve (15) on subsidiary water supply pipeline (14), pressure transmitter (3) and temperature detection element (4) and outside PLC control system (16) input connection, PLC control system (16) output connection safe solenoid valve (9), A water pump (11), a main electromagnetic valve (12), a precision electromagnetic valve (15) and an alarm (17).
2. The platen superheater water spray attemperation system of claim 1, wherein: the venturi tube (1) is made of 12Cr1 MoV.
3. The platen superheater water spray attemperation system of claim 1, wherein: the temperature detection element (4) adopts a platinum thermistor.
4. The platen superheater water spray attemperation system of claim 1, wherein: the water pump (11) adopts a variable frequency water pump.
5. The platen superheater water spray attemperation system of claim 1, wherein: and a safe water supply pipeline (7) connected with the main water supply pipeline (6) in parallel through a tee joint (13) is further arranged between the water supply pipeline (5) and the water inlet pipeline (8), and a safe electromagnetic valve (9) is installed on the safe water supply pipeline (7).
6. The platen superheater water spray attemperation system of claim 1, wherein: the precision of the precision electromagnetic valve (15) is not lower than 0.5 t/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922104107.1U CN211902835U (en) | 2019-11-29 | 2019-11-29 | Water spraying and temperature reducing system of platen superheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922104107.1U CN211902835U (en) | 2019-11-29 | 2019-11-29 | Water spraying and temperature reducing system of platen superheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211902835U true CN211902835U (en) | 2020-11-10 |
Family
ID=73299305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922104107.1U Expired - Fee Related CN211902835U (en) | 2019-11-29 | 2019-11-29 | Water spraying and temperature reducing system of platen superheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211902835U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432157A (en) * | 2020-11-18 | 2021-03-02 | 哈尔滨锅炉厂有限责任公司 | Method for monitoring vaporization degree of desuperheating water |
| CN113587075A (en) * | 2021-06-24 | 2021-11-02 | 华能巢湖发电有限责任公司 | Control method for slowing down generation and falling of oxide skin in heating pipe of power station unit |
-
2019
- 2019-11-29 CN CN201922104107.1U patent/CN211902835U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432157A (en) * | 2020-11-18 | 2021-03-02 | 哈尔滨锅炉厂有限责任公司 | Method for monitoring vaporization degree of desuperheating water |
| CN112432157B (en) * | 2020-11-18 | 2022-12-06 | 哈尔滨锅炉厂有限责任公司 | Method for monitoring vaporization degree of desuperheating water |
| CN113587075A (en) * | 2021-06-24 | 2021-11-02 | 华能巢湖发电有限责任公司 | Control method for slowing down generation and falling of oxide skin in heating pipe of power station unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211902835U (en) | Water spraying and temperature reducing system of platen superheater | |
| CN104005801B (en) | A kind of low pressure steam Differential pressure power generation system and reuse steam back pressure control method thereof | |
| CN111322607A (en) | Control system and control method for early starting of high-pressure heater | |
| CN103836607B (en) | Thermal power plant's SCR denitration reactor working temperature controller and control method thereof | |
| CN113389605A (en) | System and design method for improving steam supply safety of low-pressure shaft seal of thermal power plant | |
| CN209214399U (en) | Feed forward type hydrophobic side regulation heat exchange control system | |
| CN210152732U (en) | Soft measurement thermodynamic system for detecting bypass steam flow | |
| CN109012191A (en) | A kind of reverse osmosis membrane inflow temperature regulating device | |
| CN102620278B (en) | Method and device for controlling feedwater flow of boiler | |
| CN209076428U (en) | A kind of reverse osmosis membrane inflow temperature regulating device | |
| CN203771372U (en) | Device for detecting generation rate of oxide skin on heating surface of high-temperature steam side of thermodynamic system | |
| CN110486737A (en) | A kind of intelligence adjusts the transformation device and method of the new vapour source of boiler lifting | |
| CN211259947U (en) | Temperature and pressure reducing device | |
| CN213361492U (en) | Spray cooling device and oil conveying system | |
| CN211650199U (en) | Boiler exhaust gas temperature reduction device | |
| CN209371224U (en) | A kind of Thermal generation unit steam reheat system | |
| CN212157719U (en) | Lithium bromide absorption heat pump unit and system with temperature and pressure reducing function | |
| CN107036071B (en) | The adjusting method and its regulating device of the inflow temperature of flue gas heat-exchange unit | |
| CN220957961U (en) | Waste heat steam pipeline spray water temperature reduction system device | |
| CN207486782U (en) | A kind of boiler Stream temperature degree control attemperator | |
| CN218864151U (en) | Temperature reduction control device for steam pipeline | |
| CN219473668U (en) | Intelligent control system for quenching and cooling ultra-high temperature flue gas | |
| CN219841529U (en) | Nuclear power unit economizer | |
| CN109443030A (en) | A kind of vacuum plant suitable for air cooling unit | |
| CN219976371U (en) | Industrial steam supply temperature regulating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201110 Termination date: 20211129 |