CN215175164U - Deep extraction device for flue gas waste heat of thermal power plant - Google Patents
Deep extraction device for flue gas waste heat of thermal power plant Download PDFInfo
- Publication number
- CN215175164U CN215175164U CN202120602829.4U CN202120602829U CN215175164U CN 215175164 U CN215175164 U CN 215175164U CN 202120602829 U CN202120602829 U CN 202120602829U CN 215175164 U CN215175164 U CN 215175164U
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- China
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- absorption tower
- flue gas
- flue
- power plant
- liquid collecting
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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
Abstract
The utility model provides a thermal power plant flue gas waste heat degree of depth extraction element contains the absorption tower, and the low temperature flue gas pipeline is connected to the entry flue of absorption tower, and the export of entry flue is at least 1 way, and the bottom intercommunication of absorption tower, the bottom sets up in the absorption tower receives the liquid dish, the middle part is equipped with the filler, the top sets up circulating water distributor, receives the liquid dish and receives the liquid dish for the riser formula, communicates the export flue at the exhanst gas outlet of absorption tower, is equipped with the defroster in the exhanst gas outlet department of absorption tower, the utility model discloses a waste heat degree of depth extraction element, the direct contact heat transfer of usable circulating water and low temperature flue gas, effective recycle waste heat in the low temperature flue gas promotes the unit thermal efficiency, accords with the requirement of environmental protection, simple structure, equipment cost hang down simultaneously.
Description
Technical Field
The utility model is a waste heat extraction device suitable for low temperature flue gas treatment in thermal power plant.
Background
The existing coal-fired unit or gas-steam combined cycle unit is discharged on a flue behind a boiler, usually, different heat exchange equipment is arranged according to the scale of a power plant and the actual engineering condition except equipment for desulfurization, denitration and the like, so that the heat contained in the flue gas is recycled, the heat efficiency of the unit is improved, the temperature of the flue gas during discharge is reduced, and the current requirement on environmental protection is met.
However, the flue gas obtained by the existing heat exchange equipment such as a flue gas cooler also contains a small amount of recyclable waste heat, and if the existing heat exchange equipment is adopted, the equipment cost is high, the size is small, and if the heat is directly discharged, the heat is lost to cause waste.
How to effectively realize the heat recovery of the low-temperature flue gas and reduce the increased cost as much as possible is a problem to be solved urgently at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem lie in providing a steam power plant flue gas waste heat degree of depth extraction element promptly.
The technical means adopted by the utility model are as follows.
The utility model provides a steam power plant residual heat from flue gas degree of depth extraction element, contains the absorption tower, and low temperature flue gas pipeline is connected to the entry flue of this absorption tower, and the export of entry flue is 1 way at least, with the bottom intercommunication of absorption tower, the bottom sets up in the absorption tower and receives liquid dish, middle part and be equipped with filler, top setting circulation water distributor, at the exhanst gas outlet intercommunication export flue of absorption tower, is equipped with the defroster at the exhanst gas outlet department of absorption tower.
Preferably, the liquid collecting disc is a gas-rising pipe type liquid collecting disc, and comprises a gas-rising pipe with a certain height, an inclined baffle plate is arranged at the upper part of the gas-rising pipe, the edge of the baffle plate is positioned outside the pipe wall of the gas-rising pipe, confluence grooves are arranged in the middle and at the periphery of the liquid collecting disc, and one or more liquid collecting grooves communicated with the confluence grooves are arranged on the tower wall close to the absorption tower.
Preferably, the communicating part of the inlet flue and the absorption tower is a first reducing section, the diameter of the first reducing section is gradually increased along the flue gas direction and is funnel-shaped, the outlet of the absorption tower is a second reducing section, the diameter of the second reducing section is gradually decreased along the flue gas direction, and the demister is located in the second reducing section.
Preferably, a plurality of first guide plates are distributed in the inlet flue, and a plurality of second guide plates are distributed in the outlet flue.
Preferably, the filler is structured filler or bulk filler, and the material is metal or plastic.
Preferably, the absorption tower is of a steel or concrete structure, the liquid collecting disc and the inner wall of the absorption tower above the liquid collecting disc are coated with an anticorrosive coating, or the liquid collecting disc and the inner wall of the absorption tower above the liquid collecting disc are made of stainless steel.
Preferably, the temperature of the low-temperature flue gas passing through the absorption tower is reduced to 20-30 ℃, and the heat exchange upper end difference can be less than 1 ℃.
The utility model has the advantages that: the utility model discloses a waste heat degree of depth extraction element, the direct contact heat transfer of usable circulating water and low temperature flue gas, waste heat in the effective recycle low temperature flue gas promotes the unit thermal efficiency, accords with the requirement of environmental protection, and simple structure, equipment cost are low simultaneously.
Drawings
FIG. 1 is the structure schematic diagram of the deep extraction device for flue gas waste heat of thermal power plant of the present invention.
Fig. 2 is an enlarged schematic view of the middle draft tube of the present invention.
Detailed Description
The utility model belongs to a steam power plant flue gas waste heat degree of depth extraction element, it sets up in low temperature flue gas pipeline department.
Specifically, the extraction device comprises a hollow absorption tower 10, and an inlet flue 1 of the absorption tower 10 is connected with a low-temperature flue gas pipeline. The outlet of the inlet flue 1 can be divided into 2 paths as shown in fig. 1, and is communicated with the bottom of the absorption tower 10, and the communication part of the inlet flue 1 and the absorption tower 10 is a first reducing section 11, wherein the diameter of the first reducing section is gradually increased along the flue gas direction, and the first reducing section is in a funnel shape. A plurality of first guide plates 31 can be arranged at proper positions in the inlet flue 1, and the funnel-shaped arrangement is matched with the first guide plates 31, so that the flue gas can uniformly enter the absorption tower 10.
The bottom of the absorption tower 10 is provided with a liquid collecting tray 2, the middle part is provided with a filler 3, and the top is provided with a circulating water distributor 4.
The liquid collecting disc 2 can be an air-lift tube type liquid collecting disc, an air-lift tube 21 contained in the liquid collecting disc is a round tube or a rectangular tube with a certain height, an inclined baffle plate 22 is arranged at the upper part of the air-lift tube 21, the edge of the baffle plate 22 is positioned outside the vertical projection of the tube wall of the air-lift tube 21, circulating water can be prevented from falling into the air-lift tube 21, converging grooves (not shown in the figure) are formed in the middle and the periphery of the liquid collecting disc 2, and one or more liquid collecting grooves communicated with the converging grooves are formed in the position close to the tower wall and used for leading out the hot circulating water.
The circulating water distributor 4 adopts an existing distributor, so that the circulating water flows out from the circulating water distributor in a natural liquid drop mode.
The filler 3 can be regular filler or bulk filler, is made of metal or plastic, and is used for dispersing liquid drops to increase the heat exchange area of circulating water and flue gas.
The outlet of the absorption tower 10 is provided with a second reducing section 12, the diameter of the second reducing section is gradually reduced along the flue gas direction, a demister 5 is arranged at a proper flow speed position, the outlet of the second reducing section 12 is communicated with an outlet flue 6, and a plurality of second guide plates 32 can be arranged at a proper position in the outlet flue 6.
The whole absorption tower 10 is of a steel or concrete structure, and the liquid receiving disc 2 and the parts above are anticorrosive by adopting a coating anticorrosive coating or directly adopting stainless steel.
When the device is operated, flue gas at the temperature of about 45-100 ℃ in the flue enters the flue 1, low-temperature flue gas is guided by the first guide plate 31 to enter the riser 21 upwards and enter the filler 3, and meanwhile low-temperature circulating water flows out of the circulating water uniform distributor 4 and flows downwards to the surface of the filler 3. The heat exchange between the low-temperature flue gas and the circulating water is realized in the filler 3, the heat of the low-temperature flue gas is transferred to the circulating water, the low-temperature flue gas with the temperature of 20-30 ℃ is formed and upwards enters the demister 5 to remove carried liquid drops, and then the low-temperature flue gas is guided to enter the outlet flue 6 by the second guide plate 32. Circulating water after absorbing heat falls into the liquid receiving disc 2 based on the action of gravity, and meanwhile, circulating water falling on the baffle plate 22 is guided to the periphery and finally enters the liquid receiving disc 2 to be discharged and reused, and the temperature of the discharged circulating water is increased. In the process, the temperature of the low-temperature flue gas is reduced, the temperature of the circulating water is increased, and the extraction and utilization of the waste heat are effectively realized.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings and examples, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide a solution of the present invention with a plurality of simple modifications to avoid unnecessary repetition, and the present invention is not described separately for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (7)
1. The utility model provides a steam power plant flue gas waste heat degree of depth extraction element, its characterized in that contains absorption tower (10), and low temperature flue gas pipeline is connected in entry flue (1) of this absorption tower (10), and the export of entry flue (1) is 1 way at least, with the bottom intercommunication of absorption tower (10), bottom setting liquid receiving tray (2), middle part are equipped with filler (3), top set up circulation water distributor (4) in absorption tower (10), at the exhanst gas outlet intercommunication export flue (6) of absorption tower (10), are equipped with defroster (5) in the exhanst gas outlet department of absorption tower (10).
2. The deep extraction device for the residual heat from flue gas of the thermal power plant as claimed in claim 1, wherein the liquid collecting tray (2) is a riser type liquid collecting tray, and comprises a riser (21) with a certain height, the upper part of the riser (21) is provided with an inclined baffle (22), the edge of the baffle (22) is positioned outside the pipe wall of the riser (21), the liquid collecting tray (2) is provided with flow converging grooves in the middle and at the periphery, and the tower wall near the absorption tower (10) is provided with one or more liquid collecting grooves communicated with the flow converging grooves.
3. The deep extraction device for the residual heat from flue gas of the thermal power plant as claimed in claim 1, wherein the connection part between the inlet flue (1) and the absorption tower (10) is a first reducing section (11), the diameter of the first reducing section (11) gradually increases along the flue gas direction and is funnel-shaped, the outlet of the absorption tower (10) is a second reducing section (12), the diameter of the second reducing section (12) gradually decreases along the flue gas direction, and the demister (5) is located at the second reducing section (12).
4. The deep extraction device for the residual heat from flue gas of thermal power plant as claimed in claim 1, wherein a plurality of first guide plates (31) are arranged in the inlet flue (1), and a plurality of second guide plates (32) are arranged in the outlet flue (6).
5. The deep extraction device for the residual heat from flue gas of thermal power plant as claimed in claim 1, wherein the filler (3) is structured filler or bulk filler, and is made of metal or plastic.
6. The deep extraction device for the residual heat from flue gas of thermal power plant as claimed in claim 1, wherein the absorption tower (10) is of steel or concrete structure, the liquid collecting tray (2) and the inner wall of the absorption tower above the liquid collecting tray (2) are coated with an anticorrosive coating, or the liquid collecting tray (2) and the inner wall of the absorption tower above the liquid collecting tray (2) are made of stainless steel.
7. The deep extraction device for the waste heat of the flue gas of the thermal power plant as claimed in claim 1, wherein the temperature of the low-temperature flue gas passing through the absorption tower (10) is reduced to 20-30 ℃, and the difference between the upper ends of heat exchange is less than 1 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120602829.4U CN215175164U (en) | 2021-03-24 | 2021-03-24 | Deep extraction device for flue gas waste heat of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120602829.4U CN215175164U (en) | 2021-03-24 | 2021-03-24 | Deep extraction device for flue gas waste heat of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215175164U true CN215175164U (en) | 2021-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120602829.4U Active CN215175164U (en) | 2021-03-24 | 2021-03-24 | Deep extraction device for flue gas waste heat of thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215175164U (en) |
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2021
- 2021-03-24 CN CN202120602829.4U patent/CN215175164U/en active Active
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