CN112303659A - Titanium tube heat exchanger for recovering low-temperature flue gas waste heat - Google Patents
Titanium tube heat exchanger for recovering low-temperature flue gas waste heat Download PDFInfo
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- CN112303659A CN112303659A CN202011256732.9A CN202011256732A CN112303659A CN 112303659 A CN112303659 A CN 112303659A CN 202011256732 A CN202011256732 A CN 202011256732A CN 112303659 A CN112303659 A CN 112303659A
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- Prior art keywords
- condenser
- flue gas
- heat exchanger
- low
- tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
- F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
- F28F9/268—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators by permanent joints, e.g. by welding
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- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
本发明涉及电力行业烟气系统中低温烟气余热的回收与消白用钛管换热器，具体涉及一种回收低温烟气余热的钛管换热器，为了解决如何利用烟气系统中的低温余热对需要进入凝汽器低温的除盐水补水及凝结水进行加热，回收低品质热量的问题，每个换热器结构包括前水室、后水室、凝汽器前端管板、凝汽器后端管板和多根换热管；凝汽器前端管板的一侧和凝汽器后端管板的一侧通过多根换热管连接，前水室上设有冷却水入口和冷却水入口，前水室设置在凝汽器前端管板的另一侧，后水室设置在凝汽器后端管板的另一侧，新增钛管换热器实现深度余热回收，既能深度回收利用低品质的烟气余热加热低温除盐水和凝结水，又能达到烟气冷凝消白的作用。
The invention relates to a titanium tube heat exchanger for recovering and eliminating whitening of low-temperature flue gas waste heat in a flue gas system of the power industry, and in particular to a titanium tube heat exchanger for recovering low-temperature flue gas waste heat. Low-temperature waste heat heats the demineralized water and condensate that need to enter the condenser at low temperature, and recovers low-quality heat. The rear end of the condenser tube sheet and a plurality of heat exchange tubes; one side of the front end tube sheet of the condenser and one side of the rear end tube sheet of the condenser are connected by a plurality of heat exchange tubes, and a cooling water inlet and a cooling water inlet are arranged on the front water chamber. For the cooling water inlet, the front water chamber is set on the other side of the tube sheet at the front end of the condenser, and the rear water chamber is set on the other side of the tube sheet at the rear end of the condenser. It can deeply recycle and utilize the waste heat of low-quality flue gas to heat low-temperature desalinated water and condensed water, and can also achieve the effect of condensation and whitening of flue gas.
Description
Technical Field
The invention relates to a titanium tube heat exchanger for recovering and eliminating white waste heat of low-temperature flue gas in a flue gas system in the power industry, in particular to a titanium tube heat exchanger for recovering the low-temperature flue gas waste heat.
Background
In recent years, a power plant pays more attention to waste heat utilization in the process of promoting energy conservation and consumption reduction and environmental protection, after the low-pressure cylinder is cut and transformed, only a small amount of cooling steam is kept to enter the low-pressure cylinder in normal operation, on one hand, heat is needed to heat demineralized water for water supplement and low-temperature condensed water, but precious steam resources are consumed to heat low-temperature water, and on the other hand, a large amount of low-temperature waste heat resources exist in a desulfurization flue gas system. Adopt flue gas condensation technique to realize degree of depth waste heat recovery, can degree of depth recycle low-quality flue gas waste heat heating low temperature demineralized water and condensate water, can reach flue gas condensation and disappear white effect again, based on above reason, how to utilize the low temperature waste heat among the flue gas system to get into the microthermal demineralized water moisturizing of condenser and condensate water and heat, retrieve low-quality heat, improve the economic nature of power plant, have very big meaning, need a safe and reliable, reform transform simple to operate's gas heater.
Disclosure of Invention
The invention discloses the following purposes: the invention provides a titanium tube heat exchanger for recovering low-temperature flue gas waste heat, which aims to solve the problem of recovering low-quality heat by using low-temperature waste heat in a flue gas system to heat supplementing water and condensed water of low-temperature desalted water which needs to enter a condenser.
In order to achieve the aim, the titanium tube heat exchanger for recovering the waste heat of the low-temperature flue gas comprises a plurality of heat exchanger structures, wherein the heat exchanger structures are sequentially arranged along the transverse direction and the longitudinal direction;
each heat exchanger structure comprises a front water chamber, a rear water chamber, a condenser front end tube plate, a condenser rear end tube plate and a plurality of heat exchange tubes;
one side of each heat exchange tube is communicated with the front water chamber, the heat exchange tubes and the front water chamber are fixed through a front end tube plate of the condenser, the other side of each heat exchange tube is communicated with the rear water chamber, and the heat exchange tubes and the rear water chamber are fixed through a rear end tube plate of the condenser;
and a cooling water inlet is arranged on the front water chamber, and a cooling water outlet is arranged on the rear water chamber.
Furthermore, there are a plurality of preceding hydroeciums, and a plurality of preceding hydroecium sets up side by side, back hydroecium has a plurality of, and a plurality of back hydroeciums set up side by side.
Still further, the heat exchange tube is a titanium heat exchange tube.
Furthermore, a baffle is arranged between the upper end of the front end tube plate of the condenser and the upper end of the rear end tube plate of the condenser, and a condensed water collecting plate is arranged between the lower end of the front end tube plate of the condenser and the lower end of the rear end tube plate of the condenser.
Still further, the board condensate water collects the board tip and is equipped with the notch.
Furthermore, the bottom surface of the notch is obliquely arranged along the horizontal direction, and a plurality of liquid discharge pipes communicated to the lowest point of the notch are arranged on the side part of the condensed water collecting plate.
Still further, preceding hydroecium and back hydroecium are the arc hydroecium.
Further, the heat exchanger structure still includes a plurality of middle tube sheets, and a plurality of middle tube sheets all set up between condenser front end tube sheet and condenser rear end tube sheet.
And furthermore, the end part of the front end tube plate of the condenser, the end part of the rear end tube plate of the condenser and the end parts of the plurality of middle tube plates are connected through strip-shaped connecting pieces.
Further, the middle tube plate is made of stainless steel.
Has the advantages that: according to the titanium tube heat exchanger for recovering the waste heat of the low-temperature flue gas, the heat exchanger is composed of a plurality of groups of modules, the internal supporting structure is simple, and the field assembly is convenient. The front water chamber and the rear water chamber are of an all-welded structure, namely the front water chamber and the rear water chamber are welded with the tube plate, the cooling water inlet and the cooling water outlet are welded with an external water pipeline, and the front water chamber and the rear water chamber are arc-shaped water chambers with high bearing capacity, so that the recovery of the waste heat of the medium-low temperature flue gas behind the power station desulfurizing tower is realized.
The flue gas at the outlet of the desulfurizing tower flows through a channel outside the heat exchange pipe to exchange heat with the circulating cooling water in the heat exchange pipe, so that the temperature of the circulating cooling water in the heat exchange pipe is increased, and the low-temperature waste heat in the flue gas is utilized. Aiming at the economical efficiency of the utilization of the low-temperature energy consumption of the power plant and the particularity of the environmental protection requirement, the additionally arranged titanium tube heat exchanger realizes deep waste heat recovery, can deeply recycle the low-quality flue gas waste heat to heat low-temperature desalted water and condensed water, and can also achieve the effect of condensing and whitening the flue gas. The water vapor in the flue gas is condensed after being taken away by the circulating cooling water, so that the discharged flue gas achieves the effects of white elimination and environmental protection.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a top plan view of FIG. 1 of the present invention;
fig. 3 is a left side view of fig. 1 of the present invention.
Detailed Description
The first embodiment is as follows: a titanium tube heat exchanger for recovering low-temperature flue gas waste heat comprises a plurality of heat exchanger structures, wherein the heat exchanger structures are sequentially arranged along the transverse direction and the longitudinal direction;
each heat exchanger structure comprises a front water chamber 1-6, a rear water chamber 1-7, a condenser front end tube plate 1-3, a condenser rear end tube plate 1-8 and a plurality of heat exchange tubes 1-4;
one side of each heat exchange tube 1-4 is communicated with the front water chamber 1-6, the heat exchange tubes 1-4 and the front water chamber 1-6 are fixed through a front end tube plate 1-3 of a condenser, the other side of each heat exchange tube 1-4 is communicated with the rear water chamber 1-7, and the heat exchange tubes 1-4 and the rear water chamber 1-7 are fixed through a rear end tube plate 1-8 of the condenser;
the front water chamber 1-6 is provided with a cooling water inlet 1-1, and the rear water chamber 1-7 is provided with a cooling water outlet 1-2.
In the present embodiment: each heat exchanger structure adopts double tube plates, the tube plate at the front end of the condenser and the tube plate at the rear end of the condenser both adopt stainless steel composite titanium tube plates, and the heat exchange tubes and the titanium composite tube plates adopt a connection mode of expansion welding and use.
A plurality of N modules can be arranged in a stacking mode along the height direction of a single heat exchanger structure, and M groups of modules are arranged along the smoke flowing direction, wherein the number of the modules is NxM. The water side is connected with the tube plate in a water chamber mode to form baffling. The water chamber adopts an arc-shaped water chamber, and can bear higher water side pressure. In order to facilitate the installation and maintenance of the heat exchanger, the flue gas heat exchanger is designed in a modular manner, and the number of the flue gas heat exchanger modules of each unit is NxM. The flue gas at the outlet of the desulfurizing tower flows through the heat exchange tube to exchange heat with the circulating cooling water in the tube.
The second embodiment is as follows: the water-saving device is characterized in that the number of the front water chambers 1-6 is multiple, the number of the rear water chambers 1-7 is multiple, and the number of the rear water chambers 1-7 is multiple.
The other embodiments are the same as the first embodiment.
The third concrete implementation mode: the heat exchange tubes 1-4 are titanium heat exchange tubes.
The other embodiments are the same as the first embodiment.
The fourth concrete implementation mode: a baffle plate 1-9 is arranged between the upper end of the condenser front end tube plate 1-3 and the upper end of the condenser rear end tube plate 1-8, and a condensed water collecting plate 1-10 is arranged between the lower end of the condenser front end tube plate 1-3 and the lower end of the condenser rear end tube plate 1-8.
The other embodiments are the same as the first embodiment.
The fifth concrete implementation mode: the end parts of the condensed water collecting plates 1 to 10 are provided with notches.
In this embodiment, the notch is used to collect water droplets produced after condensation of the steam.
The other embodiments are the same as the second embodiment.
The sixth specific implementation mode: the bottom surface of the notch is obliquely arranged along the horizontal direction, and the side part of the condensed water collecting plate 1-10 is provided with a plurality of liquid discharge pipes 1-11 communicated to the lowest point of the notch.
In this embodiment, the drain pipes 1 to 11 are used for discharging the condensed water collected in the notch.
The other embodiments are the same as the fifth embodiment.
The seventh embodiment: the front water chambers 1-6 and the rear water chambers 1-7 are arc-shaped water chambers.
The other embodiments are the same as the first embodiment.
The specific implementation mode is eight: the heat exchanger structure also comprises a plurality of middle tube plates 1-5, and the middle tube plates 1-5 are arranged between the front end tube plates 1-3 of the condenser and the rear end tube plates 1-8 of the condenser.
In the present embodiment: the middle tube plate is used for supporting the heat exchange tube.
The other embodiments are the same as the first embodiment.
The specific implementation method nine: the end parts of the front end tube plates 1-3 of the condenser, the end parts of the rear end tube plates 1-8 of the condenser and the end parts of the plurality of middle tube plates 1-5 are connected through strip-shaped connecting pieces.
The other embodiments are the same as the eighth embodiment.
The detailed implementation mode is ten: the middle tube plate 1-5 is made of stainless steel.
The other embodiments are the same as the eighth embodiment.
Claims (10)
1. The utility model provides a retrieve titanium tube heat exchanger of low temperature flue gas waste heat which characterized in that: the heat exchanger comprises a plurality of heat exchanger structures which are arranged in sequence along the transverse direction and the longitudinal direction;
each heat exchanger structure comprises a front water chamber (1-6), a rear water chamber (1-7), a condenser front end tube plate (1-3), a condenser rear end tube plate (1-8) and a plurality of heat exchange tubes (1-4);
one side of each heat exchange tube (1-4) is communicated with the front water chamber (1-6), the heat exchange tubes (1-4) and the front water chamber (1-6) are fixed through a front end tube plate (1-3) of a condenser, the other side of each heat exchange tube (1-4) is communicated with the rear water chamber (1-7), and the heat exchange tubes (1-4) and the rear water chamber (1-7) are fixed through a rear end tube plate (1-8) of the condenser;
the front water chamber (1-6) is provided with a cooling water inlet (1-1), and the rear water chamber (1-7) is provided with a cooling water outlet (1-2).
2. The titanium tube heat exchanger for recovering the waste heat of the low-temperature flue gas as recited in claim 1, is characterized in that: the front water chambers (1-6) are arranged in a plurality, the front water chambers (1-6) are arranged in parallel, the rear water chambers (1-7) are arranged in a plurality, and the rear water chambers (1-7) are arranged in parallel.
3. The titanium tube heat exchanger for recovering the waste heat of the low-temperature flue gas as recited in claim 1, is characterized in that: the heat exchange tubes (1-4) are titanium heat exchange tubes.
4. The titanium tube heat exchanger for recovering the waste heat of the low-temperature flue gas as recited in claim 1, is characterized in that: and a baffle (1-9) is arranged between the upper end of the condenser front-end tube plate (1-3) and the upper end of the condenser rear-end tube plate (1-8), and a condensed water collecting plate (1-10) is arranged between the lower end of the condenser front-end tube plate (1-3) and the lower end of the condenser rear-end tube plate (1-8).
5. The titanium tube heat exchanger for recovering the waste heat of the low-temperature flue gas as recited in claim 2, characterized in that: the end parts of the condensed water collecting plates (1-10) are provided with notches.
6. The titanium tube heat exchanger for recovering the waste heat of the low-temperature flue gas as recited in claim 5, characterized in that: the bottom surface of the notch is obliquely arranged along the horizontal direction, and the side part of the condensed water collecting plate (1-10) is provided with a plurality of liquid discharge pipes (1-11) communicated to the lowest point of the notch.
7. The titanium tube heat exchanger for recovering the waste heat of the low-temperature flue gas as recited in claim 1, is characterized in that: the front water chambers (1-6) and the rear water chambers (1-7) are arc-shaped water chambers.
8. The titanium tube heat exchanger for recovering the waste heat of the low-temperature flue gas as recited in claim 1, is characterized in that: the heat exchanger structure further comprises a plurality of middle tube plates (1-5), and the middle tube plates (1-5) are arranged between the front end tube plates (1-3) of the condenser and the rear end tube plates (1-8) of the condenser.
9. The titanium tube heat exchanger for recovering the waste heat of the low-temperature flue gas as recited in claim 8, characterized in that: the end parts of the front end tube plates (1-3) of the condenser, the end parts of the rear end tube plates (1-8) of the condenser and the end parts of the plurality of middle tube plates (1-5) are connected through strip-shaped connecting pieces.
10. The titanium tube heat exchanger for recovering the waste heat of the low-temperature flue gas as recited in claim 8, characterized in that: the middle tube plate (1-5) is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011256732.9A CN112303659A (en) | 2020-11-11 | 2020-11-11 | Titanium tube heat exchanger for recovering low-temperature flue gas waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011256732.9A CN112303659A (en) | 2020-11-11 | 2020-11-11 | Titanium tube heat exchanger for recovering low-temperature flue gas waste heat |
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| Publication Number | Publication Date |
|---|---|
| CN112303659A true CN112303659A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011256732.9A Pending CN112303659A (en) | 2020-11-11 | 2020-11-11 | Titanium tube heat exchanger for recovering low-temperature flue gas waste heat |
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| CN (1) | CN112303659A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120080172A1 (en) * | 2010-10-01 | 2012-04-05 | Aic S.A. | Heat Exchanger |
| CN110094999A (en) * | 2019-03-27 | 2019-08-06 | 西安西热锅炉环保工程有限公司 | A kind of titanium tube of thin wall flue gas condenser with maintenance structure |
| CN210602855U (en) * | 2019-06-13 | 2020-05-22 | 国家能源投资集团有限责任公司 | Flue gas recovery condensate device |
| CN213777787U (en) * | 2020-11-11 | 2021-07-23 | 哈尔滨汽轮机厂辅机工程有限公司 | Titanium tube heat exchanger for recovering low-temperature flue gas waste heat |
-
2020
- 2020-11-11 CN CN202011256732.9A patent/CN112303659A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120080172A1 (en) * | 2010-10-01 | 2012-04-05 | Aic S.A. | Heat Exchanger |
| CN110094999A (en) * | 2019-03-27 | 2019-08-06 | 西安西热锅炉环保工程有限公司 | A kind of titanium tube of thin wall flue gas condenser with maintenance structure |
| CN210602855U (en) * | 2019-06-13 | 2020-05-22 | 国家能源投资集团有限责任公司 | Flue gas recovery condensate device |
| CN213777787U (en) * | 2020-11-11 | 2021-07-23 | 哈尔滨汽轮机厂辅机工程有限公司 | Titanium tube heat exchanger for recovering low-temperature flue gas waste heat |
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