CN219244369U - Clean flue gas waste heat recovery system of desulfurizing tower export - Google Patents
Clean flue gas waste heat recovery system of desulfurizing tower export Download PDFInfo
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- CN219244369U CN219244369U CN202223450778.1U CN202223450778U CN219244369U CN 219244369 U CN219244369 U CN 219244369U CN 202223450778 U CN202223450778 U CN 202223450778U CN 219244369 U CN219244369 U CN 219244369U
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a flue gas purifying waste heat recovery system at an outlet of a desulfurizing tower, which comprises the following components: the economizer is used for discharging flue gas generated by the boiler; the air preheating module is connected with the economizer and is used for preheating air entering the boiler for combustion by utilizing flue gas exhausted by the economizer; the flue gas dust removal module is connected with the air preheating module and is used for discharging the flue gas passing through the air preheating module after dust removal treatment; the circulating water module is connected with the air preheating module and the flue gas dust removal module, and is used for preheating air in the air preheating module, cooling flue gas in the flue gas dust removal module and circulating in the air preheating module and the flue gas dust removal module so as to realize recycling of waste heat of clean flue gas; improves the utilization efficiency of electric coal, reduces the consumption of electric coal and reduces the production cost of enterprises.
Description
Technical Field
The utility model relates to the technical field of energy conservation of coal-fired boilers, in particular to a flue gas purifying waste heat recovery system at an outlet of a desulfurizing tower.
Background
The heat of the clean flue gas at the outlet of the desulfurizing tower belongs to the complete waste heat of the coal-fired unit, and is discharged to the atmosphere through a chimney, and the heat of the branch is huge. Waste heat in clean flue gas at the outlet of the desulfurizing tower is recycled, so that the electric coal utilization efficiency can be improved, the electric coal consumption can be reduced, the production cost of enterprises can be reduced, clean energy consumption can be promoted, and the method has important significance in promoting carbon to peak carbon neutralization target to be realized as expected.
Therefore, how to effectively recover the waste heat of the clean flue gas at the outlet of the desulfurizing tower is a problem which needs to be solved by the technicians in the field.
Disclosure of Invention
In view of the above, the utility model provides a flue gas purifying waste heat recovery system at the outlet of a desulfurizing tower, which effectively recovers the waste heat of the flue gas purifying at the outlet of the desulfurizing tower, improves the utilization efficiency of electric coal, reduces the consumption of the electric coal and reduces the production cost of enterprises.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
preferably, in the above system for recovering waste heat of clean flue gas at outlet of desulfurizing tower, the system comprises:
the economizer is used for discharging flue gas generated by the boiler;
the air preheating module is connected with the economizer and is used for preheating air entering the boiler for combustion by utilizing flue gas exhausted by the economizer;
the flue gas dust removal module is connected with the air preheating module and is used for discharging the flue gas passing through the air preheating module after dust removal treatment;
and the circulating water module is connected with the air preheating module and the flue gas dust removal module, the circulating water is used for preheating air in the air preheating module and cooling flue gas in the flue gas dust removal module, and the air preheating module and the flue gas dust removal module circulate to realize recycling of clean flue gas waste heat.
Preferably, the air preheating module includes:
the smoke inlet channel of the air preheater is connected with a smoke outlet of the economizer, and smoke generated by the boiler is utilized to preheat air to be combusted in the boiler;
the air heater is arranged in an air duct at the inlet of the air preheater and is used for preheating air entering the air preheater by using circulating water.
Preferably, the flue gas dust removal module comprises: a dust remover, a desulfurizing tower, a flue gas cooler and a chimney;
the smoke inlet of the dust remover is connected with the smoke outlet channel of the air preheater to remove dust from smoke;
the flue gas inlet of the desulfurizing tower is connected with the flue gas outlet of the dust remover to carry out desulfurization treatment on the flue gas;
the flue gas cooler is connected with a flue gas outlet of the desulfurizing tower and is used for cooling the flue gas by using circulating water;
the chimney is connected with the smoke outlet of the smoke cooler and discharges the smoke after dust removal, desulfurization and cooling to the atmosphere.
Preferably, the circulating water module includes: a cold water pipeline, a hot water pipeline, a booster pump and a heating medium auxiliary heater;
one end of the cold water pipeline is connected with the water outlet of the heater, and the other end of the cold water pipeline is connected with the water inlet of the flue gas cooler;
one end of the hot water pipeline is connected with the water inlet of the heater, and the other end of the hot water pipeline is connected with the water outlet of the flue gas cooler;
the booster pump is arranged on the cold water pipeline and is used for providing power for circulation;
the heating medium auxiliary heater is arranged on the hot water pipeline and used for heating the circulating water.
Preferably, a desulfurizing tower export net flue gas waste heat recovery system still includes: a detection module, comprising:
the first temperature sensor is arranged at an air outlet of the air preheater and is used for detecting the temperature of air heated by the air preheater;
and the second temperature sensor is arranged in a smoke inlet channel of the air preheater and is used for detecting the temperature of smoke exhausted by the economizer.
Preferably, a desulfurizing tower export net flue gas waste heat recovery system still includes: a temperature control module, comprising:
the storage unit is used for storing the data information detected by the detection module, storing the temperature threshold value of the air heated by the air preheater and storing the smoke temperature threshold value;
the temperature adjusting unit is used for analyzing and judging according to the first temperature sensor and the temperature threshold value of the air heated by the air preheater, and when the detected temperature value is lower than the air temperature threshold value, the heating medium auxiliary heater is started to heat circulating water, so that the temperature of the air heated by the air heater is increased, and the temperature of an air outlet of the air preheater is increased; and analyzing and judging according to the second temperature sensor and the flue gas temperature threshold, when the detected temperature value is lower than the flue gas temperature threshold, starting the heating medium auxiliary heater to heat circulating water, so that the temperature of air heated by the heater is increased, and the air outlet temperature of the air preheater is prevented from being lower than the temperature threshold.
Compared with the prior art, the utility model has the beneficial effects that:
1. through setting up the heater in the import wind channel of air preheater, set up the flue gas cooler in the exit flue of desulfurizing tower, utilize circulating water to heat the flue gas waste heat recovery after will desulfurizing to the air in the heater, get back to the interior heat absorption of flue gas cooler again and heat up, form waste heat recovery system, improved electric coal utilization efficiency, reduced electric coal consumption, reduced the manufacturing cost of enterprise.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of the structure of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The embodiment of the utility model discloses a flue gas purifying waste heat recovery system at an outlet of a desulfurizing tower, which comprises the following components:
the economizer 1 is used for discharging flue gas generated by a boiler;
the air preheating module is connected with the economizer 1 and is used for preheating air entering the boiler for combustion by utilizing flue gas exhausted by the economizer 1;
the flue gas dust removal module is connected with the air preheating module and is used for discharging the flue gas passing through the air preheating module after dust removal treatment;
and the circulating water module is connected with the air preheating module and the flue gas dust removal module, the circulating water preheats the air in the air preheating module, cools the flue gas in the flue gas dust removal module, circulates in the air preheating module and the flue gas dust removal module, and realizes the recycling of the waste heat of clean flue gas.
In one embodiment, an air preheating module includes:
the air preheater 21, the smoke inlet channel of which is connected with the smoke outlet of the economizer 1, uses the smoke generated by the boiler to preheat the air to be burnt in the boiler;
the air heater 22 is arranged in an air duct at the inlet of the air preheater 21, and preheats air entering the air preheater 21 by using circulating water.
In one embodiment, a flue gas dust removal module comprises: a dust remover 31, a desulfurizing tower 32, a flue gas cooler 33, and a chimney 34;
a dust remover 31, the smoke inlet of which is connected with the smoke outlet channel of the air preheater 21 to remove dust from the smoke;
a desulfurizing tower 32, the inlet of which is connected with the outlet of the dust collector 31, for desulfurizing the flue gas;
a flue gas cooler 33 connected to the flue gas outlet of the desulfurization tower 32 for cooling the flue gas with circulating water;
and a chimney 34 connected to the smoke outlet of the smoke cooler 33, and discharging the dust-removed, desulphurized and cooled smoke to the atmosphere.
In one embodiment, a circulating water module includes: a cold water pipe 41, a hot water pipe 42, a booster pump 43, and a heating medium auxiliary heater 44;
a cold water pipe 41, one end of which is connected with the water outlet of the heater 22, and the other end of which is connected with the water inlet of the flue gas cooler 33;
a hot water pipe 42 having one end connected to a water inlet of the heater 22 and the other end connected to a water outlet of the flue gas cooler 33;
a booster pump 43 provided on the cold water pipe 41 for powering the circulation;
the heating medium auxiliary heater 44 is provided on the hot water pipe 42 to heat the circulating water.
The beneficial effects of the embodiment are as follows: through setting up the heater 22 in the import wind channel of air preheater 21, set up flue gas cooler 33 in the export flue of desulfurizing tower 32, utilize circulating water to heat the flue gas waste heat recovery after will desulfurizing to the air in the heater 22, get back to the interior heat absorption of flue gas cooler 33 again and heat up, form waste heat recovery system, improved electric coal utilization efficiency, reduced electric coal consumption, reduced the manufacturing cost of enterprise.
In one embodiment, a desulfurization tower outlet net flue gas waste heat recovery system further comprises: a detection module, comprising:
the first temperature sensor 5 is arranged at an air outlet of the air preheater 21 and is used for detecting the temperature of air heated by the air preheater 21;
the second temperature sensor 6 is arranged in the smoke inlet channel of the air preheater 21 and is used for detecting the temperature of the smoke discharged by the economizer 1.
In one embodiment, a desulfurization tower outlet net flue gas waste heat recovery system further comprises: a temperature control module, comprising:
a storage unit for storing the data information detected by the detection module, storing the temperature threshold of the heated air of the air preheater 21, and storing the flue gas temperature threshold;
a temperature adjusting unit for analyzing and judging according to the first temperature sensor 5 and the temperature threshold value of the air heated by the air preheater 21, and when the detected temperature value is lower than the air temperature threshold value, starting the heating medium auxiliary heater 44 to heat the circulating water, so that the temperature of the air heated by the air heater 22 is increased, and the temperature of the air outlet of the air preheater 21 is increased; according to the second temperature sensor 6 and the flue gas temperature threshold value, when the detected temperature value is lower than the flue gas temperature threshold value, the heating medium auxiliary heater 44 is started to heat the circulating water, so that the temperature of the air heated by the air heater 22 is increased, and the air outlet temperature of the air preheater 21 is prevented from being lower than the temperature threshold value.
The beneficial effects of the embodiment are as follows: the temperature adjusting unit is used for heating the circulating water by using the heating medium auxiliary heater, so that the stability of the temperature of the air outlet of the air preheater 21 is ensured, and the running stability of the coal-fired boiler is improved.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The utility model provides a desulfurizing tower export net flue gas waste heat recovery system which characterized in that includes:
the economizer (1) is used for discharging flue gas generated by the boiler;
the air preheating module is connected with the economizer (1) and is used for preheating air entering a boiler for combustion by utilizing flue gas exhausted by the economizer (1);
the flue gas dust removal module is connected with the air preheating module and is used for discharging the flue gas passing through the air preheating module after dust removal treatment;
and the circulating water module is connected with the air preheating module and the flue gas dust removal module, the circulating water is used for preheating air in the air preheating module and cooling flue gas in the flue gas dust removal module, and the air preheating module and the flue gas dust removal module circulate to realize recycling of clean flue gas waste heat.
2. The flue gas clean-up waste heat recovery system of claim 1, wherein the air preheating module comprises:
the air preheater (21) is connected with a smoke inlet of the economizer (1), and the smoke generated by the boiler is utilized to preheat air to be combusted in the boiler;
and the air heater (22) is arranged in an air duct at the inlet of the air preheater (21) and is used for preheating air entering the air preheater (21) by using circulating water.
3. The flue gas waste heat recovery system of claim 2, wherein the flue gas dust removal module comprises: a dust remover (31), a desulfurizing tower (32), a flue gas cooler (33) and a chimney (34);
the smoke inlet of the dust remover (31) is connected with the smoke outlet channel of the air preheater (21) to remove dust from smoke;
the flue gas desulfurization tower (32) is characterized in that a flue gas inlet of the desulfurization tower is connected with a flue gas outlet of the dust remover (31) to carry out desulfurization treatment on flue gas;
the flue gas cooler (33) is connected with a flue gas outlet of the desulfurizing tower (32) and is used for cooling the flue gas by using circulating water;
the chimney (34) is connected with a smoke outlet of the smoke cooler (33) and discharges the smoke after dust removal, desulfurization and cooling to the atmosphere.
4. A flue gas clean-up waste heat recovery system at an outlet of a desulfurizing tower according to claim 3, wherein said circulating water module comprises: a cold water pipeline (41), a hot water pipeline (42), a booster pump (43) and a heating medium auxiliary heater (44);
one end of the cold water pipeline (41) is connected with the water outlet of the warm air device (22), and the other end of the cold water pipeline is connected with the water inlet of the flue gas cooler (33);
one end of the hot water pipeline (42) is connected with the water inlet of the air heater (22), and the other end of the hot water pipeline is connected with the water outlet of the flue gas cooler (33);
the booster pump (43) is arranged on the cold water pipeline (41) and is used for providing power for circulation;
the heating medium auxiliary heater (44) is arranged on the hot water pipeline (42) and is used for heating the circulating water.
5. The flue gas waste heat recovery system of claim 4, further comprising: a detection module, comprising:
the first temperature sensor (5) is arranged at an air outlet of the air preheater (21) and is used for detecting the temperature of air heated by the air preheater (21);
and the second temperature sensor (6) is arranged in a smoke inlet channel of the air preheater (21) and is used for detecting the temperature of smoke discharged by the economizer (1).
6. The flue gas waste heat recovery system of claim 5, further comprising: a temperature control module, comprising:
the storage unit is used for storing the data information detected by the detection module, storing the temperature threshold value of the heated air of the air preheater (21) and storing the smoke temperature threshold value;
a temperature adjusting unit for analyzing and judging according to the temperature threshold value of the air heated by the first temperature sensor (5) and the air preheater (21), and starting the heating medium auxiliary heater (44) to heat circulating water when the detected temperature value is lower than the air temperature threshold value, so that the temperature of the air heated by the air heater (22) is increased, and the temperature of an air outlet of the air preheater (21) is increased; and according to the analysis and judgment of the second temperature sensor (6) and the flue gas temperature threshold, when the detected temperature value is lower than the flue gas temperature threshold, starting the heating medium auxiliary heater (44) to heat circulating water, so that the temperature of the air heated by the air heater (22) is increased, and the air outlet temperature of the air preheater (21) is prevented from being lower than the temperature threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223450778.1U CN219244369U (en) | 2022-12-22 | 2022-12-22 | Clean flue gas waste heat recovery system of desulfurizing tower export |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223450778.1U CN219244369U (en) | 2022-12-22 | 2022-12-22 | Clean flue gas waste heat recovery system of desulfurizing tower export |
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| Publication Number | Publication Date |
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| CN219244369U true CN219244369U (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223450778.1U Active CN219244369U (en) | 2022-12-22 | 2022-12-22 | Clean flue gas waste heat recovery system of desulfurizing tower export |
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- 2022-12-22 CN CN202223450778.1U patent/CN219244369U/en active Active
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