CN116294651A - Glass production line waste heat power generation system and control method - Google Patents
Glass production line waste heat power generation system and control method Download PDFInfo
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- CN116294651A CN116294651A CN202310283198.8A CN202310283198A CN116294651A CN 116294651 A CN116294651 A CN 116294651A CN 202310283198 A CN202310283198 A CN 202310283198A CN 116294651 A CN116294651 A CN 116294651A
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- waste heat
- flue gas
- power generation
- temperature flue
- production line
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- 239000002918 waste heat Substances 0.000 title claims abstract description 153
- 239000011521 glass Substances 0.000 title claims abstract description 71
- 238000010248 power generation Methods 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000010583 slow cooling Methods 0.000 claims abstract description 33
- 238000000137 annealing Methods 0.000 claims abstract description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 134
- 239000003546 flue gas Substances 0.000 claims description 134
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 63
- 238000001816 cooling Methods 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 238000006477 desulfuration reaction Methods 0.000 claims description 5
- 230000023556 desulfurization Effects 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 230000008676 import Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000000779 smoke Substances 0.000 description 18
- 239000002912 waste gas Substances 0.000 description 6
- 238000007507 annealing of glass Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000005329 float glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1892—Systems therefor not provided for in F22B1/1807 - F22B1/1861
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2001/00—Composition, conformation or state of the charge
- F27M2001/07—Glass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/01—Annealing
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to the technical field of waste heat utilization and discloses a glass production line waste heat power generation system and a control method. Compared with the traditional mode of carrying out waste heat utilization after introducing cold air into the annealing zone, the waste heat utilization device fully utilizes the waste heat in the waste heat utilization structure of the slow cooling zone, effectively improves the waste heat quality, and can also reduce the energy consumption of the slow cooling annealing zone.
Description
Technical Field
The invention relates to the technical field of waste heat utilization, in particular to a glass production line waste heat power generation system and a control method.
Background
In the glass industry, a large amount of energy is consumed. The average energy consumption of the existing float glass is 6500 kJ/kg-7500 kJ/kg glass liquid, wherein more than about 30% of heat energy is discharged in the form of waste gas, the waste gas waste heat utilization of the existing glass kiln is mature, the waste gas waste heat of the glass kiln can be fully utilized, the waste gas temperature is generally 400-500 ℃, the temperature of the waste gas is reduced to about 300 ℃ after passing through a high temperature section in a waste heat boiler, the waste gas becomes low-quality waste heat, the steam temperature is lower, the utilization rate is not high, no good means is provided for the utilization mode of the low-quality waste heat at present, the waste heat utilization mode of the existing glass annealing kiln is simple, the waste heat of the section is generally utilized for heating the water supply circulation of the boiler, the utilization degree is not high, and the application is provided for the problems.
Disclosure of Invention
The invention aims to provide a waste heat power generation system and a control method for a glass production line, which are used for improving the waste heat of high-quality flue gas by combining the waste heat of a glass annealing stage and ensuring the waste heat recycling efficiency.
The invention is realized by the following technical scheme.
The invention discloses a glass production line waste heat power generation system, which comprises a waste heat boiler, a power generation system, a water circulation system, a smoke treatment system, an exhaust system and an annealing waste heat utilization system, wherein the waste heat boiler comprises a high-temperature smoke zone and a low-temperature smoke zone, the Gao Wenyan smoke zone is connected with a glass kiln smoke discharge end, a smoke outlet of the high-temperature smoke zone is connected with a smoke inlet of the low-temperature smoke zone through the smoke treatment system, the annealing waste heat utilization system comprises a slow-cooling zone waste heat utilization structure, a smoke outlet of the high-temperature smoke zone is connected with the slow-cooling zone waste heat utilization structure, the slow-cooling zone waste heat utilization structure is connected with a smoke inlet of the high-temperature smoke zone and the smoke treatment system, the waste heat boiler is connected with the exhaust system and the power generation system, and the water circulation system is connected with the waste heat boiler and the power generation system.
Further, the water circulation system comprises a water supply preheating device, a condensing device and a deoxidizing device, wherein the condensing device is sequentially connected with the deoxidizing device and the water supply preheating device, the condensing device is connected with the power generation system, the water supply preheating device is connected with the waste heat boiler, and the deoxidizing device is connected with the water supplementing system.
Further, the exhaust system comprises a chimney, a flue gas outlet of the low-temperature flue gas zone of the waste heat boiler is connected with the water supply preheating device, and the water supply preheating device is connected with the exhaust system.
Further, the exhaust system further includes a desulfurization treatment device.
Further, the annealing waste heat utilization system further comprises a quick cooling zone waste heat utilization structure, and the quick cooling zone waste heat utilization structure is connected with the water supply preheating device.
Further, the flue gas treatment system comprises a dust removal device and a denitration device.
Further, the slow cooling zone waste heat utilization structure is connected with an auxiliary interface, and the auxiliary interface is connected with other glass production line waste heat power generation systems.
Further, the rapid cooling zone waste heat utilization structure comprises a medium supply end, the medium supply end can provide gas or water for the rapid cooling zone waste heat utilization structure, and the rapid cooling zone waste heat utilization structure is connected with the deoxidizing device.
A control method of a glass production line waste heat power generation system is based on the glass production line waste heat power generation system, and comprises the following steps:
the high-temperature flue gas in the glass kiln enters a high-temperature flue gas zone of the waste heat boiler, and medium-temperature flue gas is discharged after heat exchange;
part of medium-temperature flue gas enters a waste heat utilization structure of the slow cooling zone to cool the annealing slow cooling zone to become medium-high-temperature flue gas, and the other part of medium-temperature flue gas enters a flue gas treatment system;
part of the medium-high temperature flue gas after the temperature rise is mixed with the high-temperature flue gas in the glass kiln and enters a high-temperature flue gas area of the waste heat boiler, and the other part of the medium-high temperature flue gas enters a flue gas treatment system;
the medium-temperature flue gas treated by the flue gas treatment system enters a low-temperature flue gas area and is discharged, and then the medium-temperature flue gas is discharged through an exhaust system;
the waste heat boiler generates steam which enters the power generation system to generate power, and then the steam is circulated back to the waste heat boiler through the water circulation system.
Further, when the temperature of the high-temperature flue gas in the glass kiln in the other glass production line waste heat power generation systems exceeds a set value, part of the medium-high-temperature flue gas with the temperature rising enters the other glass production line waste heat power generation systems to be mixed with the temperature flue gas of the glass kiln.
The invention has the beneficial effects that:
through the cooling circulation of medium temperature flue gas in the annealing district, make its intensification, the rethread carries out the mixing of certain degree with the temperature proportional relation of high temperature flue gas, the effectual volume that gets into the high temperature flue gas district of high quality waste heat that has increased, thereby reach higher waste heat utilization efficiency, the waste heat in the slow cold district waste heat utilization structure has been fully utilized simultaneously, compare and carry out waste heat utilization's mode after traditional lets in cold air to the annealing district, the effectual waste heat quality that has improved, can also reduce slow cold annealing district energy consumption, reach the effect of two purposes, this kind of mode does not have the new gas simultaneously, can reduce follow-up flue gas processing system's load.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive effort for a person skilled in the art.
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic diagram of a system for generating waste heat in a glass production line according to a first embodiment;
fig. 2 is a schematic structural diagram of a waste heat power generation system of a glass production line in the second embodiment.
Detailed Description
The invention is described in detail below with reference to fig. 1-2.
Embodiment one:
the invention relates to a waste heat power generation system of a glass production line, which is shown in fig. 1, and comprises a waste heat boiler 1, a power generation system 4, a water circulation system, a flue gas treatment system, an exhaust system and an annealing waste heat utilization system, wherein the waste heat boiler 1 comprises a high-temperature flue gas zone 10 and a low-temperature flue gas zone 11, which can be separated by a baffle or other structures, an air inlet of the high-temperature flue gas zone 10 is connected with a flue gas discharge end of a glass kiln 20, a flue gas outlet of the high-temperature flue gas zone 10 is connected with a flue gas inlet of the low-temperature flue gas zone 11 by the flue gas treatment system, and concretely, the flue gas treatment system comprises a high-temperature electric dust collector 91 and a denitration reactor 92, the flue gas outlet of the high-temperature flue gas zone 10 is connected with the high-temperature electric dust collector 91, the high-temperature electric dust collector 91 is connected with the denitration reactor 92, and the denitration reactor 92 is connected with an air inlet of the low-temperature flue gas zone 11.
The glass annealing furnace 21 is divided into three sections according to the glass annealing process, namely a heating and heat-preserving section, a slow-zone stage and a fast-cooling section.
The task of the heat soak phase is to heat the glass articles fed into the lehr 21 to an annealing temperature. The heating rate should ensure that the temporary stresses generated by the article during heating do not exceed the ultimate strength of the glass itself to prevent the article from cracking. If the temperature of the product is higher than the annealing temperature when it enters the annealing furnace (which is often the case when using a high speed forming machine), it is not necessary to heat the product, but rather to cool it down to the annealing temperature as soon as possible, keep the product warm at the annealing temperature, make the temperature of each part of the product uniform, and eliminate internal stresses inherent in the glass. The annealing temperature and soak time are determined at this stage. The annealing temperature can be calculated as the highest annealing temperature based on the chemical composition of the glass. The annealing temperature commonly used in production is 20-30 ℃ lower than the highest annealing temperature, and is used as the annealing heat preservation temperature. After the annealing temperature is determined, the holding time can be calculated as the maximum allowable stress value of the glass article.
In the slow cooling stage, after the original stress in the glass is eliminated, new stress is generated in the cooling process due to higher temperature, and the magnitude of the new stress is controlled by the cooling speed. The slower the cooling rate, the less permanent stresses will be regenerated. Therefore, after the heat preservation, slow cooling is needed. The magnitude of the slow cooling speed depends on the allowable permanent stress value of the glass product, the allowable value is large, and the cooling speed can be correspondingly increased.
In the rapid cooling phase, the temperature difference will only generate temporary stresses when the glass cools below the strain point temperature. At this time, the glass product can be cooled as soon as possible until the kiln exit temperature is reached, while ensuring that the glass product is not broken by temporary stress.
The annealing waste heat utilization system comprises a slow cooling zone waste heat utilization structure 212 and a fast cooling zone waste heat utilization structure 211 which are respectively arranged in a slow zone stage and a fast cooling zone, wherein the waste heat utilization structure comprises a fan, a heat exchanger and the like, a flue gas outlet of the high-temperature flue gas zone 10 is connected with the slow cooling zone waste heat utilization structure 212, the slow cooling zone waste heat utilization structure 212 is connected with a flue gas inlet of the high-temperature flue gas zone 10 and a flue gas treatment system, the waste heat boiler 1 is connected with an exhaust system and a power generation system 4, and the water circulation system is connected with the waste heat boiler 1 and the power generation system 4.
The water circulation system comprises a water supply preheating device 54, a condensing device 43 and an oxygen removing device 53, wherein the condensing device 43 is sequentially connected with the oxygen removing device 53 and the water supply preheating device 54, the condensing device 43 is connected with the power generation system 4, the water supply preheating device 54 is connected with the waste heat boiler 1, and the oxygen removing device 53 is connected with the water supplementing system 52.
The exhaust system comprises a desulfurization treatment device 8 and a chimney 6, a flue gas outlet of the low-temperature flue gas zone 11 of the waste heat boiler 1 is connected with a water supply preheating device 54, and the water supply preheating device 54 is connected with the exhaust system.
Preferably, the rapid cooling zone waste heat utilization structure 211 is connected with the water supply preheating device 54.
The glass production line waste heat power generation system further comprises a temperature detection system, wherein the temperature detection system is used for detecting the exhaust temperature of the glass kiln and the exhaust temperature of the slow cooling zone waste heat utilization structure 212, and exhaust in the slow cooling zone waste heat utilization structure 212 enters the smoke inlet and the smoke treatment system of the high-temperature smoke zone 10 in proportion.
The working flow is as follows: the high-temperature flue gas (400-500 ℃) in the glass kiln enters the high-temperature flue gas zone 10 of the waste heat boiler 1, the medium-temperature flue gas (about 300 ℃) is discharged after heat exchange, the proportion of the medium-temperature flue gas entering the waste heat utilization structure 212 of the slow cooling zone and the flue gas treatment system is controlled according to the temperature at the slow cooling stage, the higher the temperature at the slow cooling stage is higher than the medium-temperature flue gas (about 300 ℃), the higher the proportion of the medium-temperature flue gas entering the waste heat utilization structure 212 of the slow cooling zone is, the other part of the medium-temperature flue gas enters the flue gas treatment system, enters the low-temperature flue gas zone 11 after dust removal and denitration, the lower the temperature of the medium-temperature flue gas is lower than the temperature of the medium-temperature flue gas at the slow cooling stage is, the proportion of the medium-temperature flue gas entering the waste heat utilization structure 212 of the slow cooling zone is smaller, and the discharged gas completely enters the low-temperature flue gas zone 11 after passing through the waste heat utilization structure 212 of the slow cooling zone.
The steam generated after heat exchange in the waste heat boiler 1 enters a steam turbine 41 in a power generation system 4 to drive a generator 42 to generate power, the generated steam enters a condensing device 43, passes through a condenser and a cooling tower, then enters an deoxidizing device 53 under the action of a water pump 51, enters a water supply preheating device 54 after deoxidizing, and the water supply preheating device 54 is connected with the waste heat boiler 1 to form a water circulation loop.
The flue gas after passing through the low-temperature flue gas area 11 and the economizer enters the chimney 6 through the desulfurization device 8 and is discharged under the action of a fan, and optionally, the flue gas enters the chimney 6 after passing through the desulfurization device 8 and the water supply preheating device 54 and is discharged.
The medium-temperature flue gas entering the slow cooling zone waste heat utilization structure 212 is heated under the action of the glass annealing waste heat, so that the slow cooling annealing effect of the glass is realized, the waste heat quality is improved, and the medium-temperature flue gas is changed into medium-temperature and high-temperature flue gas.
In the design of the glass kiln waste heat power generation system, the optimum working condition temperature is provided, the temperature of the glass kiln flue gas is influenced by multiple factors, the flue gas flow and the temperature can change in each production stage and under different production beats, when the temperature of the glass kiln flue gas is higher than the optimum working condition temperature, the opening of a valve is controlled according to the temperature proportional relation set in advance, medium-high temperature flue gas enters the glass kiln high temperature flue gas in proportion for mixing, the optimum working condition temperature enters the high temperature flue gas zone 10, the high-quality waste heat flue gas quantity is increased, and the rest medium-high temperature flue gas enters the flue gas treatment system and enters the low temperature flue gas zone 11 after dust removal and denitration.
Through the mode, the amount of high-quality waste heat entering the high-temperature flue gas zone 10 is effectively increased, so that higher waste heat utilization efficiency is achieved, waste heat in a slow cooling zone waste heat utilization structure is fully utilized, compared with a traditional mode of carrying out waste heat utilization after introducing cold air into an annealing zone, waste heat quality is effectively improved, energy consumption of the slow cooling annealing zone can be reduced, the effect of achieving two purposes is achieved, meanwhile, no new gas is introduced in the mode, and the load of a subsequent flue gas treatment system can be reduced.
The glass is rapidly cooled by blowing cold air through a fan in the rapid cooling zone waste heat utilization structure 211, and then the gas with waste heat enters the water supply preheating device 54 to heat water and then is discharged through the chimney 6.
The water replenishing system 52 (typically, a water supply pipeline) is used for replenishing water when the water amount in the water circulation (comprising a waste heat boiler, a power generation system and a water circulation system) is lower than a preset value, and the water enters the water circulation through the deaerator 53.
Embodiment two: on the basis of the first embodiment, the slow cooling zone waste heat utilization structure 212 is connected with the auxiliary interface 7, and the auxiliary interface 7 is connected with other glass production line waste heat power generation systems. As shown in FIG. 2, because the working conditions of each waste heat utilization system are different, the middle and high temperature flue gas in different systems can be intercommunicated and used through the auxiliary interface 7, and if the gas quantity in the No. 1 waste heat utilization system is small and the temperature is high, the middle and high temperature flue gas of other systems can be called for supplementing.
Embodiment III: on the basis of the first or second embodiment, the rapid cooling zone waste heat utilization structure 211 includes a medium supply end 31, and the medium supply end 31 can provide gas or water to the rapid cooling zone waste heat utilization structure 211, and the rapid cooling zone waste heat utilization structure 211 is connected with the oxygen removal device 53.
That is, the rapid cooling zone waste heat utilization structure 211 comprises a water pump and a fan, when water is needed to be supplemented in the water circulation, the medium supply end 31 supplies water to the rapid cooling zone waste heat utilization structure 211, water is directly utilized to cool the annealing rapid cooling zone, and the water after temperature rise enters the deaerator 53 and then enters the water circulation.
The fast cooling zone waste heat utilization structure 211 can be provided with two groups, wherein one group is air-cooled and the other group is water-cooled.
Only one group of quick-cooling zone waste heat utilization structures 211 can be arranged, wherein the heat exchange pipeline is used for water and gas, and water is introduced into the pipeline after the set water is absent in the water circulation.
Therefore, the primary heat exchange step is omitted, and the waste heat utilization efficiency is improved.
A control method of a glass production line waste heat power generation system based on the glass production line waste heat power generation system of the first or second embodiment comprises the following steps:
the high-temperature flue gas in the glass kiln enters a high-temperature flue gas zone 10 of the waste heat boiler 1, and medium-temperature flue gas is discharged after heat exchange;
part of medium-temperature flue gas enters the waste heat utilization structure 212 of the slow cooling zone to cool the annealing slow cooling zone to become medium-high-temperature flue gas, and the other part of medium-temperature flue gas enters the flue gas treatment system;
part of the medium-high temperature flue gas with the temperature rising is mixed with the high-temperature flue gas in the glass kiln to enter a high-temperature flue gas zone 10 of the waste heat boiler 1, and the other part of the medium-high temperature flue gas enters a flue gas treatment system;
the medium-temperature flue gas treated by the flue gas treatment system enters the low-temperature flue gas zone 11 and is discharged, and then the medium-temperature flue gas is discharged through an exhaust system;
the waste heat boiler 1 generates steam which enters the power generation system 4 to generate power, and then the steam is circulated back to the waste heat boiler 1 through the water circulation system.
Optionally, when the temperature of the high-temperature flue gas in the glass kiln in the other glass production line waste heat power generation system exceeds a set value, part of the medium-high-temperature flue gas with the temperature rising enters the other glass production line waste heat power generation system to be mixed with the temperature flue gas of the glass kiln.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and implement it without limiting the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (10)
1. A glass production line waste heat power generation system is characterized in that: including exhaust-heat boiler (1), power generation system (4), water circulation system, flue gas processing system, exhaust system and annealing waste heat utilization system, exhaust-heat boiler (1) are including high temperature flue gas district (10) and low temperature flue gas district (11), gao Wenyan gas district (10) are connected with glass kiln flue gas exhaust end, gao Wenyan gas district (10) flue gas export with pass through between low temperature flue gas district (11) flue gas entry flue gas processing system connects, annealing waste heat utilization system includes slow cold district waste heat utilization structure (212), gao Wenyan gas district (10) flue gas export with slow cold district waste heat utilization structure (212) are connected, slow cold district waste heat utilization structure (212) with Gao Wenyan gas district (10) flue gas import with flue gas processing system connects, exhaust-heat boiler (1) with exhaust system and power generation system (4) are connected, water circulation system connects waste heat boiler (1) and power generation system (4).
2. The glass production line waste heat power generation system according to claim 1, wherein: the water circulation system comprises a water supply preheating device (54), a condensing device (43) and an oxygen removal device (53), wherein the condensing device (43) is sequentially connected with the oxygen removal device (53) and the water supply preheating device (54), the condensing device (43) is connected with the power generation system (4), the water supply preheating device (54) is connected with the waste heat boiler (1), and the oxygen removal device (53) is connected with the water supplementing system (52).
3. The glass production line waste heat power generation system according to claim 2, wherein: the exhaust system comprises a chimney (6), a flue gas outlet of the low-temperature flue gas zone (11) of the waste heat boiler (1) is connected with the water supply preheating device (54), and the water supply preheating device (54) is connected with the exhaust system.
4. A glass production line waste heat power generation system according to claim 3, wherein: the exhaust system further comprises a desulfurization treatment device (8).
5. The glass production line waste heat power generation system according to claim 2, 3 or 4, wherein: the annealing waste heat utilization system further comprises a quick cooling zone waste heat utilization structure (211), and the quick cooling zone waste heat utilization structure (211) is connected with the water supply preheating device (54).
6. The glass production line waste heat power generation system according to claim 5, wherein: the flue gas treatment system comprises a dust removal device and a denitration device.
7. The glass production line waste heat power generation system according to claim 6, wherein: the slow cooling zone waste heat utilization structure (212) is connected with the auxiliary interface (7), and the auxiliary interface (7) is connected with other glass production line waste heat power generation systems.
8. The glass production line waste heat power generation system according to claim 6, wherein: the rapid cooling zone waste heat utilization structure (211) comprises a medium supply end (31), the medium supply end (31) can provide gas or water for the rapid cooling zone waste heat utilization structure (211), and the rapid cooling zone waste heat utilization structure (211) is connected with the deoxidizing device (53).
9. A control method of a glass production line waste heat power generation system, based on the glass production line waste heat power generation system according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
the high-temperature flue gas in the glass kiln enters a high-temperature flue gas zone (10) of the waste heat boiler (1), and medium-temperature flue gas is discharged after heat exchange;
part of medium-temperature flue gas enters a waste heat utilization structure (212) of the slow cooling zone to cool the annealing slow cooling zone to become medium-high-temperature flue gas, and the other part of medium-temperature flue gas enters a flue gas treatment system;
part of the medium-high temperature flue gas with the temperature rising is mixed with the high-temperature flue gas in the glass kiln and enters a high-temperature flue gas zone (10) of the waste heat boiler (1), and the other part of the medium-high temperature flue gas enters a flue gas treatment system;
the medium-temperature flue gas treated by the flue gas treatment system enters a low-temperature flue gas zone (11) and is discharged, and then the medium-temperature flue gas is discharged through an exhaust system;
the waste heat boiler (1) generates steam which enters the power generation system (4) to generate power, and then the steam is circulated back to the waste heat boiler (1) through the water circulation system.
10. The control method of the glass production line waste heat power generation system according to claim 9, wherein the control method comprises the following steps: when the temperature of the high-temperature flue gas in the glass kiln in the other glass production line waste heat power generation systems exceeds a set value, part of the medium-high-temperature flue gas with the temperature rising enters the other glass production line waste heat power generation systems to be mixed with the temperature flue gas of the glass kiln.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116573843A (en) * | 2023-07-13 | 2023-08-11 | 张家港市锦明机械有限公司 | Annealing kiln capable of recycling waste heat |
| CN116573843B (en) * | 2023-07-13 | 2023-09-12 | 张家港市锦明机械有限公司 | Annealing kiln capable of recycling waste heat |
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