CN218583130U - Drainage heat recovery system of thermoelectric boiler - Google Patents
Drainage heat recovery system of thermoelectric boiler Download PDFInfo
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- CN218583130U CN218583130U CN202223135415.9U CN202223135415U CN218583130U CN 218583130 U CN218583130 U CN 218583130U CN 202223135415 U CN202223135415 U CN 202223135415U CN 218583130 U CN218583130 U CN 218583130U
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Abstract
The utility model provides a boiler hydrophobic heat recovery system, which comprises a hydrophobic recoverer, a hydrophobic flash tank and a hydrophobic box, wherein the hydrophobic recoverer is provided with a first water inlet pipe, a water outlet pipe and a steam outlet pipe; the drain flash tank is connected with a water outlet pipe of the drain recoverer; the drain tank is connected with the drain recoverer; the drain tank is provided with a first reuse water pipe connected with the pin removal system and a second reuse water pipe connected with the deaerator. The utility model provides a boiler dredges hydrothermal recovery system, hydrophobic recoverer can receive the high pressure drainage and the low pressure drainage of air preheater, and supply steam to air conditioning unit in through the play steam pipe at top, make the heat in the steam obtain abundant retrieval and utilization, hot water among the hydrophobic recoverer then carries to hydrophobic flash tank, and deliver to the drain tank in through hydrophobic flash tank, deliver to deNOx systems with the hot water supply through first retrieval and utilization water pipe, deliver to the oxygen-eliminating device with the hot water supply through the second retrieval and utilization water pipe, realize hydrothermal recycle, the recycle who has improved heat energy.
Description
Technical Field
The utility model belongs to the technical field of the thermal power plant furnace body is hydrophobic, more specifically says, relates to a hydrophobic heat recovery system of thermoelectric boiler.
Background
Boiler of steam power plant is at the normal operating in-process, a large amount of high-pressure side drainage and low pressure side drainage of wind air preheater can discharge, among the prior art, supply its denitration system to dissolve and prepare urea solution in the hydrophobic case directly sending to above-mentioned drainage, although the heat to in hydrophobic has carried out the retrieval and utilization of certain degree, thermal reuse rate is lower relatively, meanwhile, in order to satisfy the requirement of the required temperature of denitration system, still need supply a large amount of demineralized water to the hydrophobic incasement and reduce the pressure and cool down, the waste of demineralized water has been caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydrophobic heat recovery system of thermoelectric boiler can effectively reduce the consumption of demineralized water, improves thermal rate of recovery.
In order to achieve the above object, the utility model adopts the following technical scheme: provided is a hydrophobic heat recovery system of a thermoelectric boiler, comprising:
a first water inlet pipe used for receiving drainage of the primary air pre-heater is arranged on one side of the drainage recoverer, a water outlet pipe is arranged on the lower portion of the other side of the drainage recoverer, and a steam outlet pipe connected with an air conditioning unit is further arranged at the top of the drainage recoverer;
the drain flash tank is connected with a water outlet pipe of the drain recoverer and used for receiving hot water in the drain recoverer;
the drain tank is connected with the drain recoverer and used for receiving hot water in the drain flash tank;
wherein, be equipped with the first reuse water pipe that links to each other with the system of taking off a round pin and the second reuse water pipe that links to each other with the oxygen-eliminating device on the drain box, the drain box is arranged in supplying the reuse water to taking off a round pin system and oxygen-eliminating device.
In one possible implementation mode, the drainage recoverer is connected with a first desalted water inlet pipe; the drainage flash tank is connected with a second demineralized water inlet pipe.
In one possible implementation mode, a first control valve is arranged on the first demineralized water inlet pipe, and a second control valve is arranged on the second demineralized water inlet pipe; a gas-liquid two-phase drain valve is also arranged between the drain recoverer and the drain flash tank.
In a possible implementation manner, a second water inlet pipe which is connected with the secondary air preheater and used for receiving the drainage of the secondary air preheater is further arranged on the drainage flash tank.
In a possible implementation manner, an emptying pipe for emptying steam is further connected to the steam outlet pipe.
In a possible implementation manner, the drainage heat recovery system of the thermoelectric boiler further comprises a control system, and the control system is electrically connected with the first control valve, the second control valve and the gas-liquid two-phase drainage valve respectively.
In a possible implementation mode, a temperature sensor and a pressure sensor are arranged in the drain recoverer, and the temperature sensor and the pressure sensor are respectively electrically connected with the control system.
In a possible implementation mode, a turning plate liquid level meter is arranged in the drain tank and is electrically connected with the control system.
In a possible implementation manner, a first hot water pump is arranged on the first reuse water pipe, a second hot water pump is arranged on the second reuse water pipe, and the first hot water pump and the second hot water pump are respectively electrically connected with the control system.
In a possible implementation manner, the drainage heat recovery system of the thermoelectric boiler further comprises a display unit, and the display unit is electrically connected with the control system and used for receiving and displaying parameter information of the control system.
The shown scheme of this application embodiment, compared with the prior art, the hydrophobic heat recovery system of thermoelectric boiler that this application embodiment provided, hydrophobic recoverer links to each other with air preheater, can receive air preheater's high pressure drainage and low pressure drainage, and supply steam in to air conditioning unit through the play steam pipe at top, make the heat in the steam obtain abundant retrieval and utilization, hot water in the hydrophobic recoverer then carries to hydrophobic flash vessel, and send to the drain box in through hydrophobic flash vessel, supply hot water to deNOx systems through first retrieval and utilization water pipe, supply hot water to the oxygen-eliminating device through the second retrieval and utilization water pipe, realize hydrothermal recycle, the effectual consumption of having practiced thrift the resource, the recycle of heat energy has been improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions 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 to obtain other drawings without inventive labor.
Fig. 1 is a schematic view of a flow structure of a hydrophobic heat recovery system of a thermoelectric boiler according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1. a drainage recoverer; 11. a first demineralized water inlet pipe; 12. a first control valve; 13. a steam outlet pipe; 14. emptying the pipe; 15. a first water inlet pipe; 2. a hydrophobic flash tank; 21. a second demineralized water inlet pipe; 22. a second control valve; 23. a gas-liquid two-phase drain valve; 24. a second water inlet pipe; 3. a drain tank; 31. a first recycled water pipe; 32. a second recycled water pipe; 33. a first hot water pump; 34. a second hot water pump.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or several of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, a hydrophobic heat recovery system of a thermoelectric boiler according to the present invention will now be described. The heat recovery system of the drainage of the thermal power boiler, including drainage recoverer 1, hydrophobic flash vessel 2 and drain tank 3, there is the first inlet pipe 15 used for receiving the air preheater drainage of primary air on one side of the drainage recoverer 1, there are water outlet pipes on the other side inferior part, the top of the drainage recoverer 1 also has steam outlet pipes 13 linking with air conditioning unit; the drain flash tank 2 is connected with a water outlet pipe of the drain recoverer 1 and used for receiving hot water in the drain recoverer 1; the drain tank 3 is connected with the drain recoverer 1 and used for receiving hot water in the drain flash tank 2;
wherein, be equipped with on the drain box 3 with take off the first reuse water pipe 31 that the system links to each other and with the second reuse water pipe 32 that the oxygen-eliminating device links to each other, the drain box 3 is arranged in supplying the reuse water to taking off the system and oxygen-eliminating device.
Compared with the prior art, the hydrophobic heat recovery system of thermoelectric boiler that this embodiment provided, hydrophobic recoverer 1 links to each other with air preheater, can receive air preheater's high pressure drainage and low pressure drainage, and supply steam in to air conditioning unit through the play steam pipe 13 at top, make the heat in the steam obtain abundant retrieval and utilization, hot water in the hydrophobic recoverer 1 then carries to hydrophobic flash tank 2, and send to in drain box 3 through hydrophobic flash tank 2, supply hot water to the deNOx systems through first retrieval and utilization water pipe 31, supply hot water to the oxygen-eliminating device through second retrieval and utilization water pipe 32, realize hydrothermal recycle, the consumption of effectual resources of having practiced thrift, the recycle ratio of heat energy has been improved.
Specifically, high-temperature steam in the drainage recoverer 1 is delivered to the air conditioning unit through the steam outlet pipe 13, so that the steam utilization requirement of the air conditioning unit can be met, and the resource waste caused by the fact that the air conditioning unit additionally utilizes electric energy for heating is avoided. In order to meet the requirement of hot water temperature (between 60 ℃ and 70 ℃) required in a subsequent denitration system or a deaerator, the heat in the hydrophobic recoverer 1 can be dispersed to a certain degree by the operation, so that the reduction of the hot water temperature in the hydrophobic recoverer 1 is facilitated, the problem of overlarge consumption of the subsequently-utilized desalted water in the hot water cooling process is avoided, and the difficulty of subsequent hot water temperature regulation is reduced to a certain degree.
The desalted water is finished water obtained by removing impurities in water such as suspended matters, colloid, inorganic cations and anions and the like by various water treatment processes. The demineralized water does not mean that all the salts in the water are removed, but is allowed to contain a small amount of impurities, depending on the application, for technical reasons and for water production cost considerations. The less impurities in the desalted water, the higher the water purity.
In some possible implementations, the above-described features of the drain recoverer 1 and the drain flash tank 2 adopt the structure shown in fig. 1. Referring to fig. 1, a first demineralized water inlet pipe 11 is connected to the hydrophobic recoverer 1; the drain flash tank 2 is connected with a second demineralized water inlet pipe 21.
In this embodiment, the first desalination inlet pipe is used to supply desalination water into the drain recovery unit 1, and the desalination water has a lower temperature, so as to reduce the pressure and temperature of hot water in the drain recovery unit 1. The second demineralized water inlet pipe 21 is connected to the drain flash tank 2 and used for supplying demineralized water to the drain flash tank 2, so that hot water in the drain flash tank 2 is subjected to pressure reduction and cooling operation, the drain flash tank 1 and the drain flash tank 2 are subjected to the step-by-step cooling effect, and therefore drain in the drain tank 3 has a proper water outlet temperature (between 60 and 70 degrees), and the temperature requirements of a denitration system and a deaerator on the hot water are met.
The drainage recoverer 1 conveys steam to the air conditioning unit through the steam outlet pipe 13, so that not only is the heat recycling realized, but also the heat dispersion is realized to a certain extent, the consumption of the desalted water in the first desalted water inlet pipe 11 and the second desalted water inlet pipe 21 is reduced, and a good energy-saving effect is realized.
Specifically, a first control valve 12 is arranged on the first demineralized water inlet pipe 11, and a second control valve 22 is arranged on the second demineralized water inlet pipe 21; a gas-liquid two-phase drain valve 23 is also arranged between the drain recoverer 1 and the drain flash tank 2. The water flow of the demineralized water in the first brine inlet pipe is controlled through the first control valve 12 so as to meet the cooling requirement of the hot water in the drain recoverer 1, and the water flow of the demineralized water in the second brine inlet pipe is controlled through the second control valve 22 so as to meet the cooling requirement of the hot water in the drain flash tank 2.
In some possible implementations, the hydrophobic flash tank 2 described above is configured as shown in fig. 1. Referring to fig. 1, a second water inlet pipe 24 connected to the secondary air pre-heater and used for receiving the water drained by the secondary air pre-heater is further disposed on the drain flash tank 2.
In this embodiment, the second water inlet pipe 24 can receive high-pressure drainage and low-pressure drainage of the secondary air pre-heater, and because the differential drainage quantity of the secondary air pre-heater is relatively small and the temperature is relatively low, the secondary air pre-heater does not need to enter the drainage recoverer 1 and directly enters the drainage flash tank 2 for heat recycling.
In some possible implementations, the steam outlet pipe 13 has a structure as shown in fig. 1. Referring to fig. 1, an evacuation pipe 14 for evacuating steam is further connected to the steam outlet pipe 13. The steam outlet pipe 13 supplies steam to the air conditioning unit and also performs evacuation processing on excess steam through an evacuation pipe 14. Due to the connection of the air conditioning unit, most heat energy of steam can be recycled, the discharge amount of the steam in the emptying pipe 14 is reduced, effective recycling of energy is realized, and excessive consumption of the desalted water in the subsequent hot water cooling process is reduced.
In some possible implementations, referring to fig. 1, the drainage heat recovery system of the thermoelectric boiler further includes a control system, and the control system is electrically connected to the first control valve 12, the second control valve 22, and the gas-liquid two-phase drainage valve 23.
In this embodiment, the control system is provided to facilitate the automatic control of the drain heat recovery system of the thermoelectric boiler. The first control valve 12 and the second control valve 22 are respectively electrically connected with the control system, the control system can respectively send control instructions to the first control valve 12 and the second control valve 22 to correspondingly adjust the flow of desalted water in the first desalted water inlet pipe 11 and the second desalted water inlet pipe 21, so that the access amount of desalted water meets the adjusting requirements of the temperature and the pressure of hot water in the drain recoverer 1 and the drain flash tank 2, and the temperature requirement of the water in the drain tank 3 for supplying hot water to a subsequent denitration system and a deaerator is met.
In some possible implementations, the above-described characteristic hydrophobic recoverer 1 adopts a structure as shown in fig. 1. Referring to fig. 1, a temperature sensor and a pressure sensor are arranged in the drainage recoverer 1, and the temperature sensor and the pressure sensor are respectively electrically connected with a control system.
In this embodiment, a temperature sensor and a pressure sensor are arranged in the drain recoverer 1, so that a temperature value and a pressure value in the drain recoverer 1 can be monitored in real time, and the temperature value and the pressure value are transmitted to the control system. The control system judges the adding speed of the demineralized water according to a preset program and sends a control instruction to the first control valve 12, so that the first control valve 12 adjusts and meets the flow requirement.
On the basis of this, the above-described characteristic drain tank 3 adopts a structure as shown in fig. 1. Referring to fig. 1, a flap level gauge is arranged in the drain tank 3 and is electrically connected with the control system.
In this embodiment, the liquid level in the drain tank 3 is monitored in real time by using the flap level meter to determine the speed of supplying hot water into the drain tank 3 by the drain flash tank 2. Specifically, the turning plate liquid level device adopts a magnetic turning plate remote transmission liquid level device, and when a magnetic floating ball of the turning plate liquid level device rises along with the liquid level, the color sheet turns so as to display the liquid level height. The flap liquid level gauge is suitable for occasions of high temperature, high pressure, corrosion resistance and the like, and can realize remote control by being connected with a control system.
In some possible implementations, the first and second recycled water pipes 31 and 32 are constructed as shown in fig. 1. Referring to fig. 1, a first hot water pump 33 is disposed on the first reuse water pipe 31, a second hot water pump 34 is disposed on the second reuse water pipe 32, and the first hot water pump 33 and the second hot water pump 34 are electrically connected to the control system respectively.
In this embodiment, the denitration system and the deaerator normally operate by using the hot water supplied in the drain tank 3. Be equipped with first hot-water pump 33 on the first reuse water pipe 31, the hot water is sent to the deNOx systems through first reuse water pipe 31 under the effect of first hot-water pump 33, utilizes the hot water of confession to dissolve and prepare urea solution, satisfies subsequent denitration operation requirement.
Meanwhile, under the action of the second hot water pump 34, hot water is delivered to the deaerator through the second reuse water pipe 32, the water using requirement of the deaerator is met, and the hot water is fully reused.
In some possible implementations, the above-described feature of the hydrophobic heat recovery system of a thermal power boiler is configured as shown in fig. 1. Referring to fig. 1, the drainage heat recovery system of the thermoelectric boiler further comprises a display unit electrically connected with the control system for receiving and displaying parameter information of the control system.
In order to facilitate the real-time understanding of various parameters in the hot water recycling process by operators, the display unit electrically connected with the control system is further arranged, the display unit can display parameter values such as temperature, pressure or flow, the operators can conveniently master the operation condition of the equipment in real time, and the corresponding handling to the abnormal condition is facilitated.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The hydrophobic heat recovery system of the thermoelectric boiler is characterized by comprising:
the air conditioner comprises a drainage recoverer, a first air preheater and a second air preheater, wherein a first water inlet pipe for receiving drainage of a primary air preheater is arranged on one side of the drainage recoverer, a water outlet pipe is arranged on the lower portion of the other side of the drainage recoverer, and a steam outlet pipe connected with an air conditioning unit is further arranged at the top of the drainage recoverer;
the drain flash tank is connected with a water outlet pipe of the drain recoverer and used for receiving hot water in the drain recoverer;
the drain tank is connected with the drain recoverer and used for receiving hot water in the drain flash tank;
the drain box is provided with a first reuse water pipe connected with the pin removal system and a second reuse water pipe connected with the deaerator, and the drain box is used for supplying reuse water to the pin removal system and the deaerator.
2. The hydrophobic heat recovery system of claim 1 wherein a first demineralized water inlet pipe is connected to the hydrophobic recovery unit; and the drainage flash tank is connected with a second demineralized water inlet pipe.
3. The hydrophobic heat recovery system of a thermoelectric boiler as set forth in claim 2, wherein a first control valve is provided on the first demineralized water inlet pipe, and a second control valve is provided on the second demineralized water inlet pipe; and a gas-liquid two-phase drain valve is also arranged between the drain recoverer and the drain flash tank.
4. The hydrophobic heat recovery system of claim 1, wherein the hydrophobic flash tank further comprises a second inlet pipe connected to the overfire air pre-heater for receiving water from the overfire air pre-heater.
5. The hydrophobic heat recovery system of a thermoelectric boiler as set forth in claim 1, wherein an evacuation pipe for evacuating steam is further connected to the steam outlet pipe.
6. The hydrophobic heat recovery system of the thermoelectric boiler as set forth in claim 3, further comprising a control system electrically connected to the first control valve, the second control valve and the gas-liquid two-phase hydrophobic valve, respectively.
7. The hydrophobic heat recovery system of claim 6, wherein a temperature sensor and a pressure sensor are disposed in the hydrophobic recoverer, and the temperature sensor and the pressure sensor are electrically connected to the control system respectively.
8. The hydrophobic heat recovery system of claim 6 wherein a flap level gauge is disposed in the hydrophobic tank, the flap level gauge being electrically connected to the control system.
9. The hydrophobic heat recovery system of any one of claims 6-8, wherein a first hot water pump is disposed on the first reuse water pipe, a second hot water pump is disposed on the second reuse water pipe, and the first hot water pump and the second hot water pump are respectively electrically connected to the control system.
10. The hydrophobic heat recovery system of the thermoelectric boiler as set forth in any one of claims 6 to 8, further comprising a display unit electrically connected to the control system for receiving and displaying parameter information of the control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223135415.9U CN218583130U (en) | 2022-11-17 | 2022-11-17 | Drainage heat recovery system of thermoelectric boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223135415.9U CN218583130U (en) | 2022-11-17 | 2022-11-17 | Drainage heat recovery system of thermoelectric boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218583130U true CN218583130U (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223135415.9U Active CN218583130U (en) | 2022-11-17 | 2022-11-17 | Drainage heat recovery system of thermoelectric boiler |
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| Country | Link |
|---|---|
| CN (1) | CN218583130U (en) |
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- 2022-11-17 CN CN202223135415.9U patent/CN218583130U/en active Active
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