CN215808611U - Primary air heating circulation system of thermal power generating unit boiler - Google Patents
Primary air heating circulation system of thermal power generating unit boiler Download PDFInfo
- Publication number
- CN215808611U CN215808611U CN202122407142.8U CN202122407142U CN215808611U CN 215808611 U CN215808611 U CN 215808611U CN 202122407142 U CN202122407142 U CN 202122407142U CN 215808611 U CN215808611 U CN 215808611U
- Authority
- CN
- China
- Prior art keywords
- steam
- primary air
- power generating
- generating unit
- thermal power
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model discloses a primary air heating circulation system of a boiler of a thermal power generating unit, which comprises an air side heater and a steam cooler, wherein the air side heater and the steam cooler are inserted in a primary air pipe, steam is introduced into the air side heater from an inlet end of the air side heater, and an outlet end of the air side heater is connected to the steam cooler. The utility model comprehensively considers the integration of a steam turbine system and a boiler system of the thermal power generating unit, realizes reasonable and full energy utilization by fully utilizing the principle of reasonable energy gradient and grade contra-aperture based on the second law of thermodynamics, and effectively improves the energy utilization efficiency of the thermal power generating unit while heating primary air by utilizing the energy of the thermal power generating unit so as to achieve the purpose of energy conservation.
Description
Technical Field
The utility model relates to the technical field of energy conservation of coal-fired thermal power generating units, in particular to a primary air heating circulating system of a boiler of a thermal power generating unit.
Background
The power generation industry is one of the prop industries of national economy, and the current thermal power generating set relying on coal and fossil fuel is still the main force of the power generation industry of China. The energy saving and consumption reduction work of the thermal power generating unit is long-term important work of each power generating enterprise, and under the current policy background of 'carbon peak reaching and carbon neutralization', the energy saving work of each power generating enterprise faces greater pressure and requirements. In order to further improve the energy utilization efficiency of the thermal power generating unit, an energy-saving technology needs to be continuously developed on the basis of the prior art so as to further develop the energy-saving potential of the power generating unit.
SUMMERY OF THE UTILITY MODEL
The utility model provides a primary air heating circulating system of a boiler of a thermal power generating unit aiming at the requirement of energy saving of the existing thermal power generating unit, which makes full use of the principle of energy exchange of energy gradient and grade opposite, and can effectively improve the energy utilization efficiency of the thermal power generating unit while heating the primary air.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
a primary air heating circulation system of a thermal power generating unit boiler comprises an air side heater and a steam cooler which are inserted in a primary air pipe, steam is introduced into the air side heater from an inlet end of the air side heater, and an outlet end of the air side heater is connected to the steam cooler.
As a further preferable aspect, the air-side heater is vertically inserted into the primary air duct along a cross section of the primary air duct.
As a further preferable scheme, the air side heater comprises an inlet steam connecting box, an outlet steam connecting box and a heating module, the heating module is arranged between the inlet steam connecting box and the outlet steam connecting box, two ends of the heating module are respectively communicated with the inlet steam connecting box and the outlet steam connecting box, the heating module is inserted into the primary air pipe, and the inlet steam connecting box and the outlet steam connecting box are respectively positioned above and below the outer side of the primary air pipe.
As a further preferable scheme, the heating module comprises a plurality of groups of heating pipe components which are sequentially arranged in parallel in the cross section of the primary air pipe, and each group of heating pipe components comprises at least two heating pipes which are arranged along the direction vertical to the cross section of the primary air pipe.
As a further preferable scheme, one or more steam inlet joints for introducing steam are arranged on the inlet steam header, and one or more steam outlet joints are arranged on the outlet steam header.
As a further preferable mode, the primary air duct is a rectangular square tube.
As a further preferable mode, the steam cooler is disposed below the air-side heater, and the air-side heater and the steam cooler are connected by a connecting pipe, and the connecting pipe is disposed in a vertical direction.
As a further preferable mode, the water inlet and the water outlet of the steam cooler are respectively connected to a steam turbine side condensate system.
As a further preferred solution, the condensation outlet of the steam cooler is connected to a water outlet of the steam cooler.
The utility model comprehensively considers the integration of a steam turbine system and a boiler system of the thermal power generating unit, realizes reasonable and full energy utilization by fully utilizing the principle of reasonable energy gradient and grade contra-aperture based on the second law of thermodynamics, and effectively improves the energy utilization efficiency of the thermal power generating unit while heating primary air by utilizing the energy of the thermal power generating unit so as to achieve the purpose of energy conservation.
The system heats cold primary air in the primary air pipe by using a steam superheating stage through an air side heater, and superheated steam after heat exchange enters a steam cooler; the low-parameter steam is adopted to meet the requirement of the heat transfer temperature difference of the system, so that the low-parameter steam can be adopted to replace the high-parameter steam, and the aim of further realizing the energy saving of the system by replacing the high-grade energy with the low-grade energy is fulfilled.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a system according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of an arrangement structure of an air side heater and a primary air duct in the system according to the embodiment of the present invention.
Fig. 3 is a schematic view of the structure in the direction of a-a in fig. 2.
In the figure: 101. a steam turbine side steam inlet pipeline 102, a primary air pipe 103 and a connecting pipeline;
200. an air side heater 201, an inlet steam connecting box 202, a heating module 221, a heating pipe 203, an outlet steam connecting box 204, a steam inlet connector 205 and a steam outlet connector;
300. steam cooler 301, water inlet pipe, 302, outlet pipe, 303, outlet pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
Referring to fig. 1, the primary air heating cycle system of a thermal power generating unit boiler in the present embodiment includes an air side heater 200 inserted in a primary air duct 102 and a steam cooler 300, and heats cold primary air in the primary air duct by introducing steam into the air side heater 200 from an inlet end of the air side heater 200 through a steam turbine side steam introduction pipe 101, and an outlet end of the air side heater 200 is connected to the steam cooler 300.
As shown in fig. 1, 2 and 3, the air side heater 200 includes an inlet steam header 201, an outlet steam header 203 and a heating module 202, the heating module 202 is disposed between the inlet steam header 201 and the outlet steam header 202, two ends of the heating module 202 are respectively communicated with the inlet steam header 201 and the outlet steam header 202, the heating module 202 is inserted into the primary air duct 102, and the inlet steam header 201 and the outlet steam header 203 are respectively located above and below the outer side of the primary air duct 102. In this embodiment, the air side heater 200 is vertically inserted into the primary air duct 102 along the cross section of the primary air duct, so that the heating action surface of the heating module is perpendicular to the flow direction of the cold primary air in the primary air duct, and when the cold primary air flows through the heating module, heat exchange is performed between the cold primary air and the steam in the heating module to heat the cold primary air; the air side heater in the system is arranged between the outlet of the fan and the air preheater, and cold primary air heated to a certain temperature enters the air preheater.
In this embodiment, the inlet steam connecting box 201 is located above the heating module 202 and is arranged above the outer side of the primary air pipe along the width direction of the primary air pipe, and the outlet steam connecting box 203 is arranged below the heating module 202 and is arranged below the outer side of the primary air pipe along the width direction of the primary air pipe. Steam flows down into the heating module from the inlet steam header 201 and then flows out of the heating module to the outlet steam header, enabling circulation of steam within the air side heater. One or more steam inlet joints 204 for connecting with a steam inlet pipeline on the steam turbine side and introducing steam into the inlet steam header 201 are arranged on the inlet steam header 201, and one or more steam outlet joints 205 for connecting with a steam cooler are arranged on the outlet steam header 203. The inlet steam of the air side heater 200 is introduced in multiple ways and can be flexibly adjusted according to different loads and different environmental temperature conditions of the unit, so that the low-parameter steam which can meet the functional requirements of the system can be adopted.
The primary air duct 102 is a rectangular square tube, as shown in fig. 2 and 3, the heating module 202 includes a plurality of groups of heating tube assemblies arranged side by side in the cross section of the primary air duct in sequence, the heating tube assemblies are arranged at intervals, and a certain distance is provided between the heating tube assemblies at two sides and two side walls of the primary air duct; each group of heating pipe components comprises at least two heating pipes 221 arranged in the direction perpendicular to the cross section of the primary air pipe, preferably, three or four heating pipes 221 are adopted in each group of heating pipe components, the heating pipes 221 in each group of heating pipe components are sequentially arranged in the flowing direction of the cold primary air, and the cold primary air is subjected to gradient heating, so that the cold primary air is fully heated. The heating pipe components in the heating module can be arranged in sequence or staggered; the heating pipe can adopt the structural forms of a light pipe or a finned pipe capable of expanding a heating surface and the like so as to improve the heat transfer efficiency.
The steam cooler 300 is arranged below the air side heater 200, the air side heater 200 is connected with the steam cooler 300 through the connecting pipeline 103, the connecting pipeline 103 is arranged along the vertical direction, enough verticality is guaranteed, the length of the connecting pipeline 103 is set to be as short as possible, the number of elbows of the connecting pipeline is set to be as small as possible, and the steam between the air side heater and the steam cooler can flow smoothly to reduce heat loss.
The water inlet of the steam cooler 300 is connected to the steam-side condensate system via an inlet water pipe 301, and the water outlet of the steam cooler 300 is connected to the steam-side condensate system via an outlet water pipe 302. The condensation outlet of the steam cooler 300 is connected to the water outlet pipe 302 through the outlet pipe 303, so that the internal energy of the system can be fully utilized.
When the system utilizes steam to flow through the air side heater, the cold primary air in the primary air pipe is heated by utilizing a steam overheating stage; the low-parameter steam is adopted to meet the requirement of the heat transfer temperature difference of the system, namely the low-parameter steam is adopted to replace the high-parameter steam, the aim of saving energy of the system by replacing high-grade energy with low-grade energy is achieved, and the enthalpy drop of the steam source parameters of the low-parameter steam and the high-grade energy is the electric quantity generated by the steam turbine.
When the system operates, steam on the steam turbine side enters an inlet steam connecting box of the air side heater through a steam inlet pipeline on the steam turbine side, the steam is uniformly distributed through the inlet steam connecting box and flows into the heating module, superheated steam flows from top to bottom in the heating pipe, the steam is subjected to heat exchange with cold primary air in the primary air pipe through the heating module in the flowing process, the superheated steam after heat exchange finally enters an outlet steam connecting box, the superheated steam after heat exchange flows into a steam cooler through a connecting pipeline after the outlet steam connecting box converges, and the cold primary air heated to a certain temperature enters the air preheater.
The steam entering the steam cooler is cooled by the steam cooler, the residual superheat enthalpy and the vaporization latent heat of the superheated steam heat the cooling water entering the steam cooler, the cooling water entering the steam cooler comes from a steam turbine side condensation water system, the heated cooling water enters the steam turbine side condensation water system, the condensation water finally formed by the steam cooled by the steam cooler is discharged from a condensation outlet of the steam cooler, and the steam is connected to a water outlet pipeline through an outlet pipeline in a self-flowing mode or a water pump pumping mode and is sent into the steam turbine side condensation water system, so that the cyclic utilization of the energy in the unit is realized, and the energy utilization rate of the unit is improved.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like used herein refer to the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which the products of the present invention are usually placed in when used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present invention do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The primary air heating circulation system of the boiler of the thermal power generating unit is characterized by comprising an air side heater and a steam cooler which are inserted in a primary air pipe, steam is introduced into the air side heater from an inlet end of the air side heater, and an outlet end of the air side heater is connected to the steam cooler.
2. The primary air heating circulation system of a thermal power generating unit boiler as claimed in claim 1, wherein the air side heater is vertically inserted into the primary air duct along a cross section of the primary air duct.
3. The primary air heating and circulating system of a thermal power generating unit boiler as claimed in claim 1 or 2, wherein the air side heater comprises an inlet steam connecting box, an outlet steam connecting box and a heating module, the heating module is arranged between the inlet steam connecting box and the outlet steam connecting box, two ends of the heating module are respectively communicated with the inlet steam connecting box and the outlet steam connecting box, the heating module is inserted into the primary air pipe, and the inlet steam connecting box and the outlet steam connecting box are respectively positioned above and below the outer side of the primary air pipe.
4. The primary air heating circulation system of a thermal power generating unit boiler as claimed in claim 3, wherein the heating module comprises multiple groups of heating tube assemblies arranged side by side in sequence in the cross section of the primary air pipe, and each group of heating tube assembly comprises at least two heating tubes arranged along the direction perpendicular to the cross section of the primary air pipe.
5. The primary air heating and circulating system of a thermal power generating unit boiler as claimed in claim 3, wherein the inlet steam header is provided with one or more steam inlet connectors for introducing steam, and the outlet steam header is provided with one or more steam outlet connectors.
6. The primary air heating cycle system of a thermal power generating unit boiler as claimed in claim 1, wherein the primary air duct is a rectangular square tube.
7. The primary air heating and circulating system of a thermal power generating unit boiler as claimed in claim 1, wherein the steam cooler is disposed below the air side heater, the air side heater and the steam cooler are connected through a connecting pipe, and the connecting pipe is disposed in a vertical direction.
8. The primary air heating circulation system of the thermal power generating unit boiler as claimed in claim 1 or 7, wherein the water inlet and the water outlet of the steam cooler are respectively connected with a steam turbine side condensed water system.
9. The primary air heating circulation system of a thermal power generating unit boiler as claimed in claim 8, wherein the condensation outlet of the steam cooler is connected to the water outlet of the steam cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122407142.8U CN215808611U (en) | 2021-09-30 | 2021-09-30 | Primary air heating circulation system of thermal power generating unit boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122407142.8U CN215808611U (en) | 2021-09-30 | 2021-09-30 | Primary air heating circulation system of thermal power generating unit boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215808611U true CN215808611U (en) | 2022-02-11 |
Family
ID=80168709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122407142.8U Active CN215808611U (en) | 2021-09-30 | 2021-09-30 | Primary air heating circulation system of thermal power generating unit boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215808611U (en) |
-
2021
- 2021-09-30 CN CN202122407142.8U patent/CN215808611U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102454980B (en) | Method for recycling flue gas waste heat of thermal power plant boiler | |
| CN103574587B (en) | Waste heat utilizing system of thermal power plant and thermal power unit | |
| CN104728823A (en) | Novel supercritical carbon dioxide coal-fired boiler | |
| CN103471084B (en) | Low-pressure hot-water smoke cooling system and method for avoiding low-temperature corrosion of air pre-heater | |
| CN110388832A (en) | A kind of system using conduction oil recycling industrial waste gas waste heat | |
| TW201529955A (en) | Flue gas heat recovery integration | |
| CN204648753U (en) | A kind of trilogy supply and heat pump UTILIZATION OF VESIDUAL HEAT IN coupled system | |
| CN104279754B (en) | Natural gas heat conducting oil boiler waste heat comprehensive utilization system | |
| CN101832623B (en) | Pre-heat system of thermal power plant | |
| CN215808611U (en) | Primary air heating circulation system of thermal power generating unit boiler | |
| CN105605776A (en) | Heat transfer oil heat-exchanging energy-saving system | |
| CN103114881B (en) | Multiple working medium backheating type Rankine cycle system | |
| CN201561488U (en) | Electrical heating system | |
| CN209213910U (en) | A kind of light coal complementary system realizing solar energy cascade and utilizing | |
| CN104235827A (en) | Boiler smoke waste heat utilization system | |
| CN102012039A (en) | Forced circulation air preheat system | |
| CN201697309U (en) | System for heating and circulating water by residual heat of waste gas | |
| CN101598511B (en) | Gas cooling system | |
| CN205424966U (en) | Gas heater flue gas thermoelectric generation tobacco pipe device | |
| CN105526596B (en) | Gas heater flue gas thermo-electric generation smoke pipe device | |
| CN217464395U (en) | High-temperature gas heat exchange device suitable for solid heat storage | |
| CN218407560U (en) | Waste heat power generation system | |
| CN202229411U (en) | Combined water circulation device for corner tube hot water boiler | |
| CN111023237B (en) | Fluid medium heating system based on solid heat storage electric boiler | |
| CN203893220U (en) | Heat exchanger with heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |