CN210662806U - Efficient energy-saving boiler continuous blowdown waste heat utilization system - Google Patents
Efficient energy-saving boiler continuous blowdown waste heat utilization system Download PDFInfo
- Publication number
- CN210662806U CN210662806U CN201921069759.XU CN201921069759U CN210662806U CN 210662806 U CN210662806 U CN 210662806U CN 201921069759 U CN201921069759 U CN 201921069759U CN 210662806 U CN210662806 U CN 210662806U
- Authority
- CN
- China
- Prior art keywords
- continuous blowdown
- flash tank
- steam
- heat exchanger
- waste heat
- 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.)
- Active
Links
Images
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A high-efficiency energy-saving boiler continuous blowdown waste heat utilization system comprises a continuous blowdown flash tank, wherein the continuous blowdown flash tank is connected with a deaerator, a heat exchanger is installed in the continuous blowdown flash tank, a cooling water inlet and a cooling water outlet are formed in the continuous blowdown flash tank, the cooling water inlet and the cooling water outlet are connected with the heat exchanger, and cooling water discharged from the cooling water outlet enters the deaerator; the lower part of the continuous blowdown flash tank is communicated with the steam-water separator through a square pipe; the bottom of the steam-water separator is provided with a sewage discharge port, the top of the steam-water separator is communicated with the middle part and the upper part of the continuous blowdown flash tank through a pipeline, and steam at the top of the continuous blowdown flash tank enters the deaerator through the pipeline. The system is simple in structure, easy to overhaul and maintain and high in safety. The problem of secondary flash evaporation steam in the traditional mode and the problem of pipeline corrosion caused by two-phase flow are solved. The heat exchanger is arranged in the continuous blowdown heat exchanger, so that the energy utilization rate is greatly improved.
Description
Technical Field
The utility model relates to a boiler sewage utilization technical field, in particular to energy-efficient boiler blowdown waste heat utilization system in succession.
Background
In order to ensure the quality of the steam, the natural circulation boiler is provided with continuous pollution discharge and periodic pollution discharge. The continuous blowdown is to continuously discharge the boiler water from the part with the maximum salt concentration in the upper steam drum in the boiler water circulation loop so as to maintain the rated salt content of the boiler water; periodic blowdown is complementary to continuous blowdown.
The sewage is generally discharged into the continuous sewage discharge flash tank at first due to the higher temperature of the sewage, and the flash tank is generally connected with the deaerator, so that the pressure of the flash tank is lower than that of a steam drum, so that a small part of sewage is vaporized, and most of unvaporized sewage is discharged into the fixed discharge flash tank and then is emptied after the temperature of the unvaporized sewage is reduced to the saturation temperature of the pressure of the continuous flash tank. Therefore, not only is a great deal of heat and water wasted, but also great heat pollution is brought to the environment.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems existing in the prior art, the utility model provides a high-efficiency energy-saving boiler continuous blowdown waste heat utilization system. Flash distillation and heat exchange are integrated, so that the energy utilization efficiency of sewage is improved, the space is saved, and the safety of the system is improved.
The utility model provides a technical scheme that its technical problem adopted is: the efficient energy-saving boiler continuous blowdown waste heat utilization system comprises a continuous blowdown flash tank, wherein the continuous blowdown flash tank is connected with a deaerator, a heat exchanger is installed in the continuous blowdown flash tank, a cooling water inlet and a cooling water outlet are formed in the continuous blowdown flash tank, the cooling water inlet and the cooling water outlet are connected with the heat exchanger, and cooling water discharged from the cooling water outlet enters the deaerator; the lower part of the continuous blowdown flash tank is communicated with the steam-water separator through a square pipe; the bottom of the steam-water separator is provided with a sewage discharge port, the top of the steam-water separator is communicated with the middle part and the upper part of the continuous blowdown flash tank through a pipeline, and steam at the top of the continuous blowdown flash tank enters the deaerator through the pipeline.
Further, the heat exchanger is arranged at the bottom in the continuous blowdown flash tank and adopts a threaded pipe heat exchanger.
Furthermore, the continuous sewage discharge flash tank is connected with the steam-water separator in a sealing mode through a square pipe, the square pipe is made of alloy steel, and the square pipe is communicated with the steam-water separator along the tangential direction of the steam-water separator.
Further, a safety valve is installed at the top of the continuous blowdown flash tank.
Further, a pressure instrument is installed at the top of the continuous sewage flash tank.
Further, the water source of the cooling water inlet adopts desalted water or condensed water.
Further, the upper half part of the heat exchanger is contacted with steam, and an anti-corrosion sleeve is welded on the upper half part of the heat exchanger.
To sum up, the utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
1. the system is simple in structure, easy to overhaul and maintain and high in safety.
2. The problem of secondary flash evaporation steam in the traditional mode and the problem of pipeline corrosion caused by two-phase flow are solved.
3. The heat exchanger is arranged in the continuous blowdown heat exchanger, so that the energy utilization rate is greatly improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure:
1 continuous blowdown flash tank, 2 heat exchangers, 3 catch water, 4 relief valves, 5 pressure instrument, 6 cooling water intakes, 7 cooling water exports, 8 sewage inlets, 9 side's pipe, 10 sewage discharge ports.
Detailed Description
The features and principles of the present invention will be described in detail below with reference to the accompanying drawings, and the illustrated embodiments are only for explaining the present invention, and do not limit the scope of the present invention.
As shown in FIG. 1, the high-efficiency energy-saving boiler continuous blowdown waste heat utilization system comprises a continuous blowdown flash tank 1, wherein the continuous blowdown flash tank 1 is connected with a deaerator.
Heat exchanger 2 is installed to the bottom in the continuous blowdown flash tank 1, and it has cooling water inlet 6 and cooling water outlet 7 to open on the continuous blowdown flash tank 1, and cooling water inlet 6 and cooling water outlet 7 are connected with heat exchanger 2, and demineralized water or condensate water are adopted to the water source of cooling water inlet 6, and the cooling water that cooling water outlet 7 was discharged enters the oxygen-eliminating device after 2 heat transfer intensifications of heat exchanger.
The heat exchanger 2 adopts the threaded pipe heat exchanger 2, so that most of the heat exchanger 2 is guaranteed to be immersed in water, and the top of the heat exchanger 2 exchanges heat with flash steam. In order to avoid the steam corrosion of the heat exchanger 2, the upper half part of the heat exchanger 2 is contacted with the steam, and the part contacted with the steam is easier to attack the water and corrode because of the existence of condensed water drops, so an anti-corrosion sleeve is additionally welded on the outer part of the top of the heat exchanger 2 to protect the upper half part of the heat exchanger 2.
And a sewage inlet 8 is also formed in the continuous sewage discharging flash tank 1, and the continuous sewage discharging water of the boiler is connected to the sewage inlet 8 in the middle of the continuous sewage discharging flash tank 1 through a pipeline.
In order to avoid the corrosion of two-phase flow, the lower part of the continuous blowdown flash tank 1 is communicated with the steam-water separator 3 through a square pipe 9. The continuous pollution discharge flash tank 1 is hermetically connected with the steam-water separator 3 through a square pipe 9, the square pipe 9 is made of alloy steel, and the square pipe 9 is communicated with the steam-water separator 3 along the tangential direction of the steam-water separator 3. The continuous blowdown flash tank 1 and the catch water 3 adopt the square pipe 9 to connect, because the pipe produces the torrent more easily, so adopt the square pipe 9 to do benefit to catch water 3. The purpose of the tangential entry is that because the density of water and steam is different, the density of water is high, and the density of steam is low, so that the water is more easily attached to the wall surface, and the steam cannot. Is more beneficial to the discharge of steam and is beneficial to the steam-water separation 3.
The bottom of the steam-water separator 3 is provided with a sewage discharge port 10, the top of the steam-water separator is communicated with the middle part and the upper part of the continuous sewage discharge flash tank 1 through a pipeline, and steam at the top of the continuous sewage discharge flash tank 1 enters the deaerator through a pipeline. And the cooling sewage at the lower part of the steam-water separator 3 is directly discharged into a sewage disposal pool outside the plant.
In order to ensure the safety of the equipment, a safety valve 4 and a pressure instrument 5 are arranged at the top of the continuous sewage discharging flash tank 1.
The invention is further described below with reference to an engineering example:
in a certain thermal power plant, the rated evaporation capacity of a boiler is 320t/h, the pollution discharge rate is 2%, and cooling water adopts desalted water and the pressure is 0.8 MPa.
The desalted water is led out from a desalted water main pipe of the deaerating room and enters a continuous blowdown flash tank 1 (the inlet parameter is 0.8MPa, 25 ℃), and then enters the deaerator after heat exchange is carried out by a heat exchanger 2 (the temperature can reach 60 ℃). The flash steam (parameter 0.54MPa, 155 ℃) at the top of the continuous blowdown flash tank 1 enters a deaerator. Thus greatly reducing the using amount of the heating steam of the deaerator.
The sewage discharged from the continuous sewage discharging flash tank 1 tangentially enters the steam-water separator 3 through the thickened alloy steel pipe, and the top of the steam-water separator 3 is communicated with the continuous sewage discharging flash tank 1 to maintain steam pressure balance. The temperature of the sewage after the steam-water separation 3 is close to the direct discharge temperature requirement, and the sewage can be directly discharged into a periodic sewage discharge pool or a sewage discharge pool.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, which is defined by the appended claims.
Claims (7)
1. A high-efficiency energy-saving boiler continuous blowdown waste heat utilization system comprises a continuous blowdown flash tank, wherein the continuous blowdown flash tank is connected with a deaerator; the lower part of the continuous blowdown flash tank is communicated with the steam-water separator through a square pipe; the bottom of the steam-water separator is provided with a sewage discharge port, the top of the steam-water separator is communicated with the middle part and the upper part of the continuous blowdown flash tank through a pipeline, and steam at the top of the continuous blowdown flash tank enters the deaerator through the pipeline.
2. The efficient energy-saving boiler continuous blowdown waste heat utilization system as claimed in claim 1, wherein the heat exchanger is mounted at the bottom in the continuous blowdown flash tank, and a threaded pipe heat exchanger is adopted.
3. The efficient energy-saving boiler continuous blowdown waste heat utilization system according to claim 1, wherein the continuous blowdown flash tank is connected with the steam-water separator through a square pipe in a sealing mode, the square pipe is made of alloy steel, and the square pipe is communicated with the steam-water separator along the tangential direction of the steam-water separator.
4. The energy-efficient boiler continuous blowdown waste heat utilization system as claimed in claim 1, wherein a safety valve is installed at the top of the continuous blowdown flash tank.
5. The energy-efficient boiler continuous blowdown waste heat utilization system as claimed in claim 1, wherein a pressure gauge is installed at the top of the continuous blowdown flash tank.
6. The continuous blowdown and waste heat utilization system of the high-efficiency energy-saving boiler as claimed in claim 1, wherein a water source of the cooling water inlet adopts demineralized water or condensed water.
7. The efficient energy-saving boiler continuous blowdown and waste heat utilization system as claimed in claim 1, wherein the upper half portion of the heat exchanger is in contact with steam, and an anti-corrosion sleeve is welded on the upper half portion of the heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921069759.XU CN210662806U (en) | 2019-07-09 | 2019-07-09 | Efficient energy-saving boiler continuous blowdown waste heat utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921069759.XU CN210662806U (en) | 2019-07-09 | 2019-07-09 | Efficient energy-saving boiler continuous blowdown waste heat utilization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210662806U true CN210662806U (en) | 2020-06-02 |
Family
ID=70817737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921069759.XU Active CN210662806U (en) | 2019-07-09 | 2019-07-09 | Efficient energy-saving boiler continuous blowdown waste heat utilization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210662806U (en) |
-
2019
- 2019-07-09 CN CN201921069759.XU patent/CN210662806U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104713058B (en) | Self-deoxidization waste heat boiler suitable for sulfur-containing fuel | |
| CN102519032B (en) | Sewage drainage energy-saving flash tank | |
| CN102092808A (en) | Device for desalinating seawater by utilizing residual heat of tail gas exhausted by diesel engine | |
| CN101349421A (en) | Steam generator | |
| CN203549781U (en) | Waste heat deaerator | |
| CN203560885U (en) | Continuous blowdown waste heat recovery system used for boiler | |
| CN201429062Y (en) | Continuous pollution discharge energy-saving device for industrial boiler | |
| CN107741010A (en) | A kind of boiler blowdown water waste heat and water resource recycling system | |
| CN103994458B (en) | Complex phase-change heat exchanger suitable in fired power generating unit | |
| CN210662806U (en) | Efficient energy-saving boiler continuous blowdown waste heat utilization system | |
| CN207501127U (en) | A kind of boiler blowdown water waste heat and water resource recycling system | |
| CN111485350A (en) | Waste heat recovery system of setting machine | |
| CN202915353U (en) | Comprehensive cooling system for air-water combined slag cooler of CFB boiler | |
| CN102506413B (en) | Desalted water high-pressure oxygen removing method capable of utilizing low-temperature heat of catalytic cracking device | |
| CN211060085U (en) | Exhaust-heat boiler blowdown system | |
| CN111237738B (en) | Efficient boiler blow-down energy recovery device and method | |
| CN212335542U (en) | Waste heat recovery system of setting machine | |
| CN212378579U (en) | Little steam turbine exhaust steam recycling system | |
| CN201496944U (en) | Residual steam recovery device of thermal deaerator | |
| CN212537802U (en) | Waste heat and waste water recovery device | |
| CN210624494U (en) | High-temperature heat storage type steam boiler | |
| CN202902258U (en) | Closed-type condensation water recovery system of steam thermodynamic system | |
| CN220541798U (en) | Low-pressure exhaust steam and condensed water heat energy efficient utilization system | |
| CN206247310U (en) | condensed water circulation heating device | |
| CN215808417U (en) | Boiler constant-drainage waste heat utilization device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |