CN209763035U - Waste heat recovery and white elimination system of thermal power plant's flash tank of surely arranging - Google Patents
Waste heat recovery and white elimination system of thermal power plant's flash tank of surely arranging Download PDFInfo
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- CN209763035U CN209763035U CN201920499190.4U CN201920499190U CN209763035U CN 209763035 U CN209763035 U CN 209763035U CN 201920499190 U CN201920499190 U CN 201920499190U CN 209763035 U CN209763035 U CN 209763035U
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Abstract
The utility model discloses a waste heat recovery and white elimination system of a fixed-discharge flash tank of a thermal power plant, which comprises a condensed water pipeline at the outlet of a condensed water pump of a unit, a cooling water shut-off valve, a heat exchanger, a backwater shut-off valve and a condensed water system of the unit; the condensed water pipeline at the outlet of the unit condensed water pump is communicated with one end of a cooling water shut-off valve, the other end of the cooling water shut-off valve is communicated with the heat absorption side inlet of a heat exchanger, the heat absorption side outlet of the heat exchanger is communicated with the unit condensed water system through a return water shut-off valve, and the emptying pipeline of the constant-discharge flash tank is used as the heat release side of the heat exchanger.
Description
Technical Field
the utility model belongs to the technical field of the white system that disappears of thermal power plant relates to a flash tank waste heat recovery that surely arranges of thermal power plant disappears white system.
Background
Along with the vigorous implementation of national energy-saving and emission-reducing policies, the thermal power plant gradually strengthens the utilization of the waste heat of the thermal power plant, the purposes of reducing energy consumption and saving cost are achieved, meanwhile, along with the proposal of concepts such as green enterprises, the requirements of the environmental protection field of the thermal power plant are more and more strict, the control on leakage and leakage is strengthened by a plurality of thermal power plants, low-grade steam is emitted out of an emptying pipeline of a fixed-discharge flash tank, so that the phenomenon of white smoke emission occurs, the thermal power plant directly discharges the part of low-grade steam at present, partial heat energy is wasted, visual pollution can be generated, and the enterprise image is influenced, therefore, the utilization of the part of heat energy is strengthened, energy can be saved, and the enterprise image can be improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a flash tank waste heat recovery white system that disappears is arranged surely to thermal power plant, this system can retrieve the low-grade heat energy of arranging in the flash tank evacuation pipeline surely, reaches the white purpose of disappearing simultaneously.
In order to achieve the purpose, the waste heat recovery and white elimination system of the fixed-discharge flash tank of the thermal power plant comprises a condensed water pipeline at the outlet of a condensed water pump of a unit, a cooling water shut-off valve, a heat exchanger, a backwater shut-off valve and a condensed water system of the unit;
The condensed water pipeline at the outlet of the condensed water pump of the unit is communicated with one end of a cooling water shut-off valve, the other end of the cooling water shut-off valve is communicated with the heat absorption side inlet of the heat exchanger, the heat absorption side outlet of the heat exchanger is communicated with the condensed water system of the unit through a backwater shut-off valve, and the emptying pipeline of the constant-discharge flash tank is used as the heat release side of the heat exchanger.
and a cooling water flow regulating device is arranged between the cooling water shutoff valve and the heat absorption side inlet of the heat exchanger.
A backwater temperature measuring device is arranged on a pipeline between the heat absorption side outlet of the heat exchanger and the backwater shutoff valve.
The cooling water circulation system is characterized by further comprising a controller, wherein the controller is connected with the backwater temperature measuring device and the cooling water flow regulating device.
The temperature measuring device is used for detecting the temperature at the outlet of the emptying pipeline, and the temperature measuring device is connected with the controller.
The utility model discloses following beneficial effect has:
Flash vessel waste heat recovery white system disappears is arranged surely to thermal power plant when concrete operation, through will drawing out the condensate water of the same kind from the condensate pump of unit export condensate water pipe and enter into the heat absorption side of heat exchanger to the low-grade heat in the evacuation pipeline is retrieved to the mode through the heat transfer, with the cooling and condensing of steam in realizing the evacuation pipeline, with the humidity that reduces evacuation pipeline discharge exhaust steam, and then the problem of effectual solution white smoke that emits, simple structure, convenient operation, the practicality is stronger. In addition, steam condenses to flow into behind the water droplet and decides to arrange the flash tank under the effect of self gravity in, it is to explain, the utility model discloses on the basis that does not increase the energy consumption, will decide to arrange flash tank evacuation pipeline low-grade heat recovery to unit condensate system in, can reduce the coal consumption of unit electricity generation to a certain extent, effectively eliminate the vision pollution that decides the calandria exhaust steam and cause simultaneously, have better economy and environmental benefit.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a cooling water shut-off valve, 2 is a cooling water flow regulating device, 3 is a fixed discharge flash tank, 4 is a heat exchanger, 5 is a backwater temperature measuring device, 6 is a backwater shut-off valve, and 7 is a controller.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
Referring to fig. 1, the waste heat recovery and white elimination system of the flash tank of the thermal power plant comprises a condensed water pipeline at the outlet of a condensed water pump of a unit, a cooling water shut-off valve 1, a heat exchanger 4, a return water shut-off valve 6 and a condensed water system of the unit; the condensed water pipeline at the outlet of the unit condensed water pump is communicated with one end of a cooling water shut-off valve 1, the other end of the cooling water shut-off valve 1 is communicated with the heat absorption side inlet of a heat exchanger 4, the heat absorption side outlet of the heat exchanger 4 is communicated with the unit condensed water system through a return water shut-off valve 6, and the emptying pipeline of the fixed-discharge flash tank 3 serves as the heat release side of the heat exchanger 4.
A cooling water flow adjusting device 2 is arranged between the cooling water shutoff valve 1 and the heat absorption side inlet of the heat exchanger 4; a backwater temperature measuring device 5 is arranged on a pipeline between the heat absorption side outlet of the heat exchanger 4 and the backwater shutoff valve 6; the utility model also comprises a controller 7, wherein the controller 7 is connected with the backwater temperature measuring device 5 and the cooling water flow adjusting device 2; the utility model discloses still including the temperature measuring device who is used for detecting evacuation pipeline exit temperature, wherein, temperature measuring device is connected with controller 7.
The utility model discloses a concrete working process does:
Condensed water led out from a condensed water pipeline at the outlet of the unit condensed water pump enters a heat absorption side of the heat exchanger 4 through the cooling water shutoff valve 1 to absorb heat and raise the temperature, and then returns to the unit condensed water system through the return water shutoff valve 6, steam in an emptying pipeline of the fixed discharge flash tank 3 and the condensed water in the heat absorption side of the heat exchanger 4 exchange heat and lower the temperature to condense the steam into water drops, then the water drops flow into the fixed discharge flash tank 3 under the action of self gravity, and then the water vapor content in the emptying pipeline of the fixed discharge flash tank 3 is reduced, so that the purposes of low-grade heat recovery and whitening elimination in the emptying pipeline of the fixed discharge flash tank 3 are achieved.
Specifically, the controller 7 detects temperature information at the outlet of the evacuation pipeline in real time through the temperature measuring device, detects temperature information of condensed water in the pipeline between the outlet of the heat absorption side of the heat exchanger 4 and the return water shut-off valve 6 in real time through the return water temperature measuring device 5, and increases the flow of the condensed water entering the heat absorption side of the heat exchanger 4 through the cooling water flow regulating device 2 when the temperature information at the outlet of the evacuation pipeline is greater than or equal to a preset temperature value or when the temperature of the condensed water in the pipeline between the outlet of the heat absorption side of the heat exchanger 4 and the return water shut-off valve 6 is greater than or equal to a preset condensed water temperature threshold value, so that steam in the evacuation pipeline is condensed to be lower than 90 ℃, and meanwhile, the condensed water recovers low-grade heat in the evacuation pipeline in a heat exchange mode, and solves the phenomenon that white smoke is emitted at.
Claims (5)
1. A waste heat recovery and white elimination system of a fixed-discharge flash tank of a thermal power plant is characterized by comprising a condensed water pipeline at an outlet of a condensed water pump of a unit, a cooling water shut-off valve (1), a heat exchanger (4), a backwater shut-off valve (6) and a condensed water system of the unit;
the condensed water pipeline at the outlet of the condensed water pump of the unit is communicated with one end of a cooling water shut-off valve (1), the other end of the cooling water shut-off valve (1) is communicated with the heat absorption side inlet of a heat exchanger (4), the heat absorption side outlet of the heat exchanger (4) is communicated with the condensed water pipeline of the unit through a backwater shut-off valve (6), and the emptying pipeline of the fixed-discharge flash tank (3) is used as the heat discharge side of the heat exchanger (4).
2. the waste heat recovery and white elimination system of the fixed-discharge flash tank of the thermal power plant as claimed in claim 1, characterized in that a cooling water flow regulating device (2) is arranged between the cooling water shutoff valve (1) and the heat absorption side inlet of the heat exchanger (4).
3. The waste heat recovery and white elimination system of the fixed-displacement flash tank of the thermal power plant as claimed in claim 2, wherein a return water temperature measuring device (5) is arranged on a pipeline between the outlet of the heat absorption side of the heat exchanger (4) and the return water shutoff valve (6).
4. The waste heat recovery and white elimination system of the fixed-discharge flash tank of the thermal power plant as claimed in claim 3, further comprising a controller (7), wherein the controller (7) is connected with the return water temperature measuring device (5) and the cooling water flow regulating device (2).
5. The thermal power plant flash tank waste heat recovery and white elimination system of claim 4, further comprising a temperature measurement device for detecting the temperature at the outlet of the emptying pipeline, wherein the temperature measurement device is connected with the controller (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920499190.4U CN209763035U (en) | 2019-04-12 | 2019-04-12 | Waste heat recovery and white elimination system of thermal power plant's flash tank of surely arranging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920499190.4U CN209763035U (en) | 2019-04-12 | 2019-04-12 | Waste heat recovery and white elimination system of thermal power plant's flash tank of surely arranging |
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| CN209763035U true CN209763035U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920499190.4U Active CN209763035U (en) | 2019-04-12 | 2019-04-12 | Waste heat recovery and white elimination system of thermal power plant's flash tank of surely arranging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915810A (en) * | 2019-04-12 | 2019-06-21 | 西安西热锅炉环保工程有限公司 | A kind of thermal power plant arranges the recycling of flash vessel waste heat surely and disappears white system and its working method |
-
2019
- 2019-04-12 CN CN201920499190.4U patent/CN209763035U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915810A (en) * | 2019-04-12 | 2019-06-21 | 西安西热锅炉环保工程有限公司 | A kind of thermal power plant arranges the recycling of flash vessel waste heat surely and disappears white system and its working method |
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