CN213630999U - Raw water control system of thermal power factory - Google Patents
Raw water control system of thermal power factory Download PDFInfo
- Publication number
- CN213630999U CN213630999U CN202022635629.7U CN202022635629U CN213630999U CN 213630999 U CN213630999 U CN 213630999U CN 202022635629 U CN202022635629 U CN 202022635629U CN 213630999 U CN213630999 U CN 213630999U
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- Prior art keywords
- raw water
- water
- valve
- water pipe
- buffer tank
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 223
- 238000003756 stirring Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000012528 membrane Substances 0.000 description 7
- 238000001223 reverse osmosis Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
A raw water control system of a thermal power plant comprises a buffer tank and a water storage tank which are connected through a connecting pipe; a water passing valve is arranged on the connecting pipe and electrically connected with a controller; the buffer tank is connected with a raw water pipe, a hot water pipe and a cold water pipe, and the raw water pipe, the hot water pipe and the cold water pipe are respectively provided with a raw water valve, a hot water valve and a cold water valve; the buffer tank is internally provided with a first temperature sensor, the bottom of the buffer tank is provided with a weight sensor, the hot water pipe and the cold water pipe are respectively provided with a flowmeter and a second temperature sensor, and the first temperature sensor, the weight sensor, the flowmeter, the second temperature sensor, the raw water valve, the hot water valve and the cold water valve are electrically connected to the controller. The utility model discloses can be in the temperature of the accurate control raw water of buffer tank, need not take back raw water through the pump and carry out the secondary temperature and adjust, the energy consumption is low, and need not frequently carry out the break-make operation to the valve, and the valve is difficult bad, does not need frequent maintenance to overhaul, has reduced hand labor.
Description
Technical Field
The utility model relates to a water temperature regulation and control field, especially a raw water control system of thermal power factory.
Background
At present, most of thermal power plants adopt a mode of ultrafiltration, reverse osmosis and ion exchange desalination to treat raw water, and then the raw water is used as a water source for supplementing condensed water. However, the working efficiency of the reverse osmosis device is greatly influenced by the temperature of a water source, and researches show that: the reverse osmosis membrane water production is very sensitive to the change of the inlet water temperature, the water yield is increased by 2.5-3.0% when the inlet water temperature rises by 1 ℃, but the water temperature exceeds 45 ℃, so that the membrane is rapidly hydrolyzed, and the composite membrane is damaged. The temperature of the raw water should be controlled within the range of 25 + -5 deg.C.
In the south, many thermal power plants near rivers and lakes adopt open circulating water as condenser steam cooling water, and this type of power plant generally uses circulating water as a raw water source. The water inlet temperature of the circulating water is kept between 10 and 27 ℃, and the water outlet temperature is kept between 20 and 40 ℃.
In winter and spring, the water temperature is low, the water temperature is about 10-15 ℃, the filtration pores of the reverse osmosis membrane are reduced by low-temperature raw water, the water passing amount of the membrane is reduced, and the discharge amount of wastewater is increased; the filtration pore of the reverse osmosis membrane becomes small, and simultaneously, the pressure of the equipment can also rise, so that the pressure of the reverse osmosis membrane is increased, and the service life of the reverse osmosis device is influenced.
Current power plant raw water control system carries out the temperature to the water after adjusting at the delivery port and detects the back, if the temperature is unqualified, gets back to the regulating tank through the pump drainage with water through the control solenoid valve, adjusts the temperature once more, if detect qualified, derives water through the control solenoid valve, and the energy consumption is big like this, and the valve break-make is frequent moreover, needs often to maintain the maintenance even the maintenance.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a raw water control system of thermal power factory, the energy consumption is low, valve frequency of use is low.
The purpose of the utility model is realized through the following technical scheme:
a raw water control system of a thermal power plant comprises a buffer tank and a water storage tank which are connected through a connecting pipe; a water passing valve is arranged on the connecting pipe and electrically connected with a controller; the buffer tank is connected with a raw water pipe, a hot water pipe and a cold water pipe, and the raw water pipe, the hot water pipe and the cold water pipe are respectively provided with a raw water valve, a hot water valve and a cold water valve; the buffer tank is internally provided with a first temperature sensor, the bottom of the buffer tank is provided with a weight sensor, the hot water pipe and the cold water pipe are respectively provided with a flowmeter and a second temperature sensor, and the first temperature sensor, the weight sensor, the flowmeter, the second temperature sensor, the raw water valve, the hot water valve and the cold water valve are electrically connected to the controller.
Further, a stirring device is arranged in the buffer tank.
Furthermore, agitating unit includes the (mixing) shaft that sets up along buffer tank height direction and with the motor of (mixing) shaft transmission connection, the (mixing) shaft is last to hang down and is equipped with the blade.
Further, the hot water pipe is connected to the bottom of the buffer tank, and the cold water pipe is connected to the top of the buffer tank.
Further, a liquid level sensor is arranged in the water storage tank and electrically connected to the controller.
Furthermore, filter screens are arranged in the hot water pipe, the cold water pipe and the raw water pipe.
Further, a heat-insulating layer is arranged on the outer wall of the water storage tank.
The utility model has the advantages that:
the water temperature of the raw water can be accurately controlled in the buffer tank 11, the raw water does not need to be pumped back through a pump to be subjected to secondary water temperature adjustment, the energy consumption is low, the valve does not need to be frequently subjected to on-off operation, the valve is not easy to damage, frequent maintenance and overhaul are not needed, and the manual labor is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an electrical schematic of the present invention;
in the figure, a buffer tank 11, a water storage tank 12, a connecting pipe 21, a raw water pipe 22, a hot water pipe 23, a cold water pipe 24, a water passing valve 31, a raw water valve 32, a hot water valve 33, a cold water valve 34, a first temperature sensor 41, a weight sensor 42, a flow meter 43, a second temperature sensor 44, a stirring shaft 51, a motor 52, a blade 53, and a liquid level sensor 61 are shown.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.
The first embodiment is as follows:
as shown in fig. 1 to 2, a raw water control system of a thermal power plant includes a buffer tank 11 and a water storage tank 12 connected by a connection pipe 21; a water valve 31 is arranged on the connecting pipe 21, and the water valve 31 is electrically connected with a controller; the buffer tank 11 is connected with a raw water pipe 22, a hot water pipe 23 and a cold water pipe 24, and the raw water pipe 22, the hot water pipe 23 and the cold water pipe 24 are respectively provided with a raw water valve 32, a hot water valve 33 and a cold water valve 34; the water heater is characterized in that a first temperature sensor 41 is arranged in the buffer tank 11, a weight sensor 42 is arranged at the bottom of the buffer tank 11, a flow meter 43 and a second temperature sensor 44 are arranged on the hot water pipe 23 and the cold water pipe 24 respectively, and the first temperature sensor 41, the weight sensor 42, the flow meter 43, the second temperature sensor 44, the raw water valve 32, the hot water valve 33 and the cold water valve 34 are electrically connected to a controller.
The working principle is as follows:
after the raw water enters the buffer tank 11, hot water is added if the temperature of the raw water is lower than the required temperature, and cold water is added if the temperature of the raw water is higher than the required temperature.
Before and after hot water or cold water is added into raw water, the total heat of the hot water and the cold water is equal, and the heat of the liquid is expressed as CMT; c represents the heat capacity, equal for the same liquid, M represents the mass, and T represents the temperature. Thus, the mass of raw water is expressed as moldThe temperature of the raw water is denoted as ToldThe mass and temperature of the added water are expressed as madd、TaddFinally the water temperature after the two are mixed evenly is TneedThe mass of the water after the two are mixed evenly is mold+maddThen the following equation is present:
mold×Told+madd×Tadd＝(mold+madd)×Tneed (1)
according to the formula, the mass of the water to be added can be calculated according to the temperature and the weight of the raw water, the required temperature and the temperature of the added water, and the formula (2):
the first temperature sensor 41 senses the temperature of water in the buffer tank 11, the weight sensor 42 senses the weight of water in the buffer tank 11, the flow meter 43 senses the flow rate of water supplied into the buffer tank 11 through the hot water pipe 23 and the cold water pipe 24, and the second temperature sensor 44 senses the temperature of water in the hot water pipe 23 and the cold water pipe 24.
The controller work flow is as follows:
(1) opening the raw water valve 32, and closing the raw water valve 32 after the water in the buffer tank 11 reaches a certain quality;
(2) calculating according to the formula (2) according to the data sensed by the first temperature sensor 41, the weight sensor 42 and the second temperature sensor 44 to obtain the mass of the hot water or the cold water to be added;
(3) the cold water valve 34 and the hot water valve 33 are controlled to be opened or closed according to the determination of whether cold water or hot water is added according to the temperature of the raw water in the buffer tank 11 sensed by the first temperature sensor 41.
(4) And calculating the mass of the actually added hot water or cold water according to the signal input by the flowmeter 43, and closing the corresponding hot water valve 33 or cold water valve 34 when the mass of the actually added hot water or cold water reaches the mass of the required hot water or cold water.
(5) Reading the reading of the first temperature sensor 41 again, determining whether the temperature of the water in the buffer tank 11 reaches the required temperature, if not, returning to the step (2) to continue adding hot water or cold water, if so, opening the water valve 31 to flow the water in the buffer tank 11 into the water storage tank 12.
Like this, can be in buffer tank 11 accurate control raw water's temperature, need not take back raw water through the pump and carry out secondary temperature and adjust, the energy consumption is low, need not frequently carry out the break-make operation to the valve moreover, and the valve is difficult bad, does not need frequent maintenance to overhaul, has reduced hand labor.
Example two:
as shown in fig. 1 to 2, the second embodiment has all the features of the first embodiment, except that:
and a stirring device is arranged in the buffer tank 11. The stirring device comprises a stirring shaft 51 arranged along the height direction of the buffer tank 11 and a motor 52 in transmission connection with the stirring shaft 51, wherein blades 53 are vertically arranged on the stirring shaft 51.
The raw water and the cold/hot water in the buffer tank 11 are uniformly mixed by the stirring of the stirring device.
The hot water pipe 23 is connected to the bottom of the buffer tank 11, and the cold water pipe 24 is connected to the top of the buffer tank 11.
The density of water is maximum at 4 degrees celsius. Above 4 ℃, the density of water decreases with increasing temperature, and after hot water is added, the density increases, and after cold water is added, the density decreases.
The hot water pipe 23 is provided at the bottom of the buffer tank 11, the hot water rises from the bottom after entering the buffer tank 11 and performs partial heat exchange with the raw water in the buffer tank 11, the cold water pipe 24 is provided at the top of the buffer tank 11, and the cold water descends from the top after entering the buffer tank 11 and performs partial heat exchange with the raw water in the buffer tank 11. Thus, the stirring operation for making the water temperature uniform can be reduced, the power consumption is reduced, and the device is more environment-friendly.
Example three:
as shown in fig. 1 to 2, the third embodiment has all the features of the first embodiment, except that:
a liquid level sensor 61 is arranged in the water storage tank 12, and the liquid level sensor 61 is electrically connected to the controller.
The liquid level sensor 61 senses the liquid level of the water in the water storage tank 12, if the liquid level in the water storage tank 12 is reduced quickly, the required temperature of the water in the buffer tank 11 controlled by the controller is slightly lower, and the water in the buffer tank 11 can be used quickly because the water consumption is large; if the liquid level in the water storage tank 12 drops slowly, the required temperature of the water in the buffer tank 11 controlled by the controller is slightly higher, and because the water consumption is small, the water in the buffer tank 11 can be stored for a long time, so that the problem that the water temperature is too low due to long-time heat dissipation and is not in line with the use requirement is avoided.
And filter screens are arranged in the hot water pipe 23, the cold water pipe 24 and the raw water pipe 22. Preventing impurities from entering the surge tank 114.
The outer wall of the water storage tank 12 is provided with a heat preservation layer. The water in the water storage tank 12 is kept warm.
The water valve 31, the raw water valve 32, the hot water valve 33 and the cold water valve 34 are all electromagnetic valves, the types of the first temperature sensor 41 and the second temperature sensor 44 are DS18B20, the type of the weight sensor 42 is PTS124, the flow meter 43 adopts a SYTF-BS target type intelligent flow meter, the liquid level sensor 61 adopts an LVCN414 series sensor, and the controller adopts an AT89C51 singlechip.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (7)
1. A raw water control system of a thermal power plant comprises a buffer tank and a water storage tank which are connected through a connecting pipe; a water passing valve is arranged on the connecting pipe and electrically connected with a controller; the buffer tank is connected with a raw water pipe, a hot water pipe and a cold water pipe, and the raw water pipe, the hot water pipe and the cold water pipe are respectively provided with a raw water valve, a hot water valve and a cold water valve; the method is characterized in that: the buffer tank is internally provided with a first temperature sensor, the bottom of the buffer tank is provided with a weight sensor, the hot water pipe and the cold water pipe are respectively provided with a flowmeter and a second temperature sensor, and the first temperature sensor, the weight sensor, the flowmeter, the second temperature sensor, the raw water valve, the hot water valve and the cold water valve are electrically connected to the controller.
2. The raw water control system of a thermal power plant according to claim 1, wherein: and a stirring device is arranged in the buffer tank.
3. The raw water control system of a thermal power plant according to claim 2, wherein: the stirring device comprises a stirring shaft arranged along the height direction of the buffer tank and a motor in transmission connection with the stirring shaft, and blades are vertically arranged on the stirring shaft.
4. The raw water control system of a thermal power plant according to claim 1, wherein: the hot water pipe is connected to the bottom of the buffer tank, and the cold water pipe is connected to the top of the buffer tank.
5. The raw water control system of a thermal power plant according to claim 1, wherein: a liquid level sensor is arranged in the water storage tank and electrically connected with the controller.
6. The raw water control system of a thermal power plant according to claim 1, wherein: and filter screens are arranged in the hot water pipe, the cold water pipe and the raw water pipe.
7. The raw water control system of a thermal power plant according to any one of the preceding claims, wherein: the outer wall of the water storage tank is provided with a heat preservation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022635629.7U CN213630999U (en) | 2020-11-13 | 2020-11-13 | Raw water control system of thermal power factory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022635629.7U CN213630999U (en) | 2020-11-13 | 2020-11-13 | Raw water control system of thermal power factory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213630999U true CN213630999U (en) | 2021-07-06 |
Family
ID=76633179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022635629.7U Withdrawn - After Issue CN213630999U (en) | 2020-11-13 | 2020-11-13 | Raw water control system of thermal power factory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213630999U (en) |
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2020
- 2020-11-13 CN CN202022635629.7U patent/CN213630999U/en not_active Withdrawn - After Issue
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210706 Effective date of abandoning: 20240105 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210706 Effective date of abandoning: 20240105 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |