CN105465810A - Smoke waste heat utilization system for coal-fired boiler - Google Patents

Smoke waste heat utilization system for coal-fired boiler Download PDF

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Publication number
CN105465810A
CN105465810A CN201510949634.6A CN201510949634A CN105465810A CN 105465810 A CN105465810 A CN 105465810A CN 201510949634 A CN201510949634 A CN 201510949634A CN 105465810 A CN105465810 A CN 105465810A
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CN
China
Prior art keywords
heat exchanger
supply line
water supply
input
coal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510949634.6A
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Chinese (zh)
Inventor
文鸣明
廖远东
罗森标
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Yudean Dabu Power Generation Co Ltd
Original Assignee
Guangdong Yudean Dabu Power Generation Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Yudean Dabu Power Generation Co Ltd filed Critical Guangdong Yudean Dabu Power Generation Co Ltd
Priority to CN201510949634.6A priority Critical patent/CN105465810A/en
Publication of CN105465810A publication Critical patent/CN105465810A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00Preventing emissions
    • F23J2215/20Sulfur; Compounds thereof
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

Abstract

The invention relates to the field of smoke treatment of a coal-fired boiler of a power plant, in particular to a smoke waste heat utilization system for the coal-fired boiler. The smoke waste heat utilization system comprises a dust remover smoke cooling unit, a desulfurizing tower smoke heating unit, a water circulation unit and a compressed air pipeline; the dust remover smoke cooling unit comprises front-arranged heat exchangers arranged at the input end of an electric dust remover; the desulfurizing tower smoke heating unit comprises a rear-arranged heat exchanger arranged at the output end of a desulfurizing tower; one ends of the front-arranged heat exchangers are connected to a flue of the coal-fired boiler, and the other ends of the front-arranged heat exchangers are connected to the input end of the electric dust remover; one end of the rear-arranged heat exchanger is connected to the output end of the desulfurizing tower, and the other end of the rear-arranged heat exchanger is connected to the input end of a chimney. According to the invention, the waste heat of smoke generated by the coal-fired boiler is fully utilized, the energy investment in the smoke treatment step is lowered for the power plant, and the economic benefit is improved.

Description

A kind of smoke waste heat utilization system of coal-burning boiler
Technical field
The present invention relates to the fume treatment field of coal-fired boiler in power plant, particularly a kind of smoke waste heat utilization system of coal-burning boiler.
Background technology
Thermal power plant is generated electricity by coal-burning boiler, can produce a large amount of flue gases.The flue gas that coal-burning boiler produces needs by being discharged in air after the process such as dedusting and desulfurization, and in flue gas, a large amount of waste heat is not utilized, and causes waste.The dust removing effects that the high-temperature flue gas produced by coal-burning boiler directly enters in deduster is poor, usually needs to be lowered the temperature to the flue gas entered in deduster by heat exchanger, to pack appearance effect.Discharged after desulfurizing tower desulfurization again by the flue gas after dedusting, but flue gas is lowered the temperature when flue gas ash removal, and if the direct discharge of low-temperature flue gas easily forms gypsum rain.Therefore, need again to be heated up by heat exchanger by the flue gas after desulfurizing tower desulfurization process.
Need first to lower the temperature to flue gas to heat up afterwards in the dedusting and sweetening process of flue gas, need the energy of at substantial, if the waste heat in the flue gas that coal-burning boiler can be produced is used, huge economic benefit will be brought to power plant.Therefore, the invention provides a kind of smoke waste heat utilization system being applicable to dust-removal and desulfurizing flow process.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of smoke waste heat utilization system of coal-burning boiler is provided, at the input of electric cleaner, preposition heat exchanger is set, rearmounted heat exchanger is set at the output of desulfurizing tower, is circulated between preposition heat exchanger and rearmounted heat exchanger by the lower recirculated water of water circulation system examination.Enter into the high-temperature flue gas heat exchange that recirculated water in preposition heat exchanger and coal-burning boiler produce, be lowered into the temperature of flue gas in electric cleaner, improve efficiency of dust collection; Recirculated water carries out heat exchange with the flue gas after desulfurizing tower desulfurization process, raises the temperature entering into flue gas in chimney, avoids producing gypsum rain.Take full advantage of the waste heat that coal-burning boiler produces flue gas, decrease power plant and drop at the energy of fume treatment link, improve economic benefit.
For solving the problem, the invention provides following technical scheme:
A smoke waste heat utilization system for coal-burning boiler, comprises deduster flue gas cool-down unit, desulfurizing tower flue gas intensification unit, water circulation unit and compressed air piping; Described deduster flue gas cool-down unit comprises the preposition heat exchanger being arranged at electric cleaner input; Described desulfurizing tower flue gas intensification unit comprises the rearmounted heat exchanger being arranged at desulfurizing tower output; Described one end of preposition heat exchanger is connected with the flue of coal-burning boiler, and the other end is connected with the input of electric cleaner; Described one end of rearmounted heat exchanger is connected with the output of desulfurizing tower, and the other end is connected with the input of chimney; Described preposition heat exchanger and rearmounted heat exchanger are pipe heat exchanger; Described pipe heat exchanger comprises the heat exchanger shell that is connected with flue and is located at the heat exchanger tube be connected in heat exchanger shell and with water circulation unit; Described heat exchanger shell be provided be communicated with flue enter mouth and outlet flue; Described heat exchanger tube is provided with the water inlet and delivery port that are connected with water circulation unit; Described heat exchanger shell is provided with soot blower; Described soot blower output extends to heat exchanger shell inside.
Described water circulation unit comprises the first water supply line, the second water supply line, hot media compensator and booster pump group; The input of described first water supply line is connected with the output of booster pump group; The delivery port of the heat exchanger tube of described rearmounted heat exchanger and the output parallel connection of hot media compensator are linked into the input of booster pump group; The water inlet of the heat exchanger tube of described preposition heat exchanger is linked into the output of the first water supply line; The delivery port of the heat exchanger tube of described preposition heat exchanger is linked into the input of the second water supply line; The water inlet of the heat exchanger tube of described rearmounted heat exchanger is linked into the output of the second water supply line.
Described water circulation unit also comprises auxiliary heat-exchanging unit; Described auxiliary heat-exchanging unit comprises the 3rd water supply line, the 4th water supply line, hot media auxiliary heater and hydrophobic heater; Between the input that described 3rd water supply line parallel connection is linked into the first water supply line and output; Described hydrophobic heater is installed on the 3rd water supply line; Between the input that described 4th water supply line parallel connection is linked into the second water supply line and output; Described hot media auxiliary heater is installed on the 4th water supply line; The input of described hot media auxiliary heater connects auxiliary steam mother pipe, and the output of described hydrophobic heater connects full factory draining system.
The input of the soot blower that described preposition heat exchanger is installed connects compressed air piping; The input of the soot blower that described rearmounted heat exchanger is installed connects auxiliary steam mother pipe.
Be positioned in described heat exchanger shell and be equipped with temperature monitoring point near mouth and outlet flue; Pressure detecting point is provided with in described heat exchanger shell; Described heat exchanger tube is provided with temperature detecting point.
The input of described first water supply line and the second water supply line and output are equipped with temperature detecting point and pressure detecting point.
Described first water supply line and the second water supply line are all provided with flowmeter.
The input of described hot media auxiliary heater is provided with temperature detecting point and pressure detecting point; The output of described hot media auxiliary heater and hydrophobic heater is equipped with temperature detecting point.
Described compressed air piping and the female pipe of auxiliary steam are equipped with temperature detecting point and pressure detecting point.
Beneficial effect: the smoke waste heat utilization system of a kind of coal-burning boiler of the present invention, at the input of electric cleaner, preposition heat exchanger is set, rearmounted heat exchanger is set at the output of desulfurizing tower, is circulated between preposition heat exchanger and rearmounted heat exchanger by the lower recirculated water of water circulation system examination.Enter into the high-temperature flue gas heat exchange that recirculated water in preposition heat exchanger and coal-burning boiler produce, be lowered into the temperature of flue gas in electric cleaner, improve efficiency of dust collection; Recirculated water carries out heat exchange with the flue gas after desulfurizing tower desulfurization process, raises the temperature entering into flue gas in chimney, avoids producing gypsum rain.Take full advantage of the waste heat that coal-burning boiler produces flue gas, decrease power plant and drop at the energy of fume treatment link, improve economic benefit.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present invention;
Description of reference numerals: preposition heat exchanger 1, rearmounted heat exchanger 2, soot blower 3, heat exchanger tube 4, first water supply line 5, second water supply line 6, hot media compensator 7, booster pump group 8,3rd water supply line the 9, four water supply line 10, hot media auxiliary heater 11, hydrophobic heater 12.
Detailed description of the invention
Below in conjunction with Figure of description and embodiment, specific embodiments of the invention are described in further detail:
With reference to the smoke waste heat utilization system of a kind of coal-burning boiler shown in Fig. 1, comprise deduster flue gas cool-down unit, desulfurizing tower flue gas intensification unit, water circulation unit and compressed air piping; Described deduster flue gas cool-down unit comprises the preposition heat exchanger 1 being arranged at electric cleaner input; Described desulfurizing tower flue gas intensification unit comprises the rearmounted heat exchanger 2 being arranged at desulfurizing tower output; Described one end of preposition heat exchanger 1 is connected with the flue of coal-burning boiler, and the other end is connected with the input of electric cleaner; Described one end of rearmounted heat exchanger 2 is connected with the output of desulfurizing tower, and the other end is connected with the input of chimney; Described preposition heat exchanger 1 and rearmounted heat exchanger 2 are pipe heat exchanger; Described pipe heat exchanger comprises the heat exchanger shell that is connected with flue and is located at the heat exchanger tube 4 be connected in heat exchanger shell and with water circulation unit; Described heat exchanger shell be provided be communicated with flue enter mouth and outlet flue; Described heat exchanger tube 4 is provided with the water inlet and delivery port that are connected with water circulation unit; Described heat exchanger shell is provided with soot blower 3; Described soot blower 3 output extends to heat exchanger shell inside.
Described water circulation unit comprises the first water supply line 5, second water supply line 6, hot media compensator 7 and booster pump group 8; The input of described first water supply line 5 is connected with the output of booster pump group 8; The delivery port of the heat exchanger tube 4 of described rearmounted heat exchanger 2 and the output parallel connection of hot media compensator 7 are linked into the input of booster pump group 8; The water inlet of the heat exchanger tube 4 of described preposition heat exchanger 1 is linked into the output of the first water supply line 5; The delivery port of the heat exchanger tube 4 of described preposition heat exchanger 1 is linked into the input of the second water supply line 6; The water inlet of the heat exchanger tube 4 of described rearmounted heat exchanger 2 is linked into the output of the second water supply line 6.
Described water circulation unit also comprises auxiliary heat-exchanging unit; Described auxiliary heat-exchanging unit comprises the 3rd water supply line 9, the 4th water supply line 10, hot media auxiliary heater 11 and hydrophobic heater 12; Between the input that described 3rd water supply line 9 parallel connection is linked into the first water supply line 5 and output; Described hydrophobic heater 12 is installed on the 3rd water supply line 9; Between the input that described 4th water supply line 10 parallel connection is linked into the second water supply line 6 and output; Described hot media auxiliary heater 11 is installed on the 4th water supply line 10; The input of described hot media auxiliary heater 11 connects auxiliary steam mother pipe, and the output of described hydrophobic heater 12 connects full factory draining system.
The input of the soot blower 3 that described preposition heat exchanger is installed connects compressed air piping; The input of the soot blower 3 that described rearmounted heat exchanger is installed connects auxiliary steam mother pipe.
Be positioned in described heat exchanger shell and be equipped with temperature monitoring point near mouth and outlet flue; Pressure detecting point is provided with in described heat exchanger shell; Described heat exchanger tube 4 is provided with temperature detecting point.
Input and the output of described first water supply line 5 and the second water supply line 6 are equipped with temperature detecting point and pressure detecting point.
Described first water supply line 5 and the second water supply line 6 are all provided with flowmeter.
The input of described hot media auxiliary heater 11 is provided with temperature detecting point and pressure detecting point; The output of described hot media auxiliary heater 11 and hydrophobic heater 12 is equipped with temperature detecting point.
Described compressed air piping and the female pipe of auxiliary steam are equipped with temperature detecting point and pressure detecting point.
About operation principle of the present invention:
The high-temperature flue gas that coal-burning boiler produces enters in preposition heat exchanger 1 and carries out heat exchange with recirculated water, to be lowered into the temperature of flue gas in electric cleaner, improves dust removing effects; Heat exchange is carried out by the flue gas after the recirculated water after the heat exchange of preposition heat exchanger 1 enters rearmounted heat exchanger 2 and desulfurization, to improve the temperature of the flue gas entered in chimney, avoid the formation of gypsum rain, be meanwhile back in preposition heat exchanger 1 by the recirculated water after the heat exchange of rearmounted heat exchanger 2; Water circulation system is provided with hot media compensator 7 and booster pump group 8, to keep the regular supply of recirculated water.In addition, water circulation unit is also provided with auxiliary heat-exchanging unit, when the water temperature entering into the recirculated water in rearmounted heat exchanger 2 is not enough to flue gas after desulfurization to be heated to the temperature meeting discharge standard, auxiliary heating can be carried out by hot media auxiliary heater 11 to it; When entering into the recirculated water water temperature over-high in preposition heat exchanger 1 and affecting the cooling-down effect of flue gas in preposition heat exchanger 1, can be lowered the temperature to it by hydrophobic heater 12.Wherein, the input of hot media auxiliary heater 11 connects auxiliary steam mother pipe, carries out heat exchange, to improve the temperature entering into rearmounted heat exchanger 2 Inner eycle water, ensure the heat exchanger effectiveness of rearmounted heat exchanger 2 by high-temperature steam and recirculated water; After cooling, steam enters in hydrophobic heater 12 and carries out heat exchange with recirculated water, to be lowered into the temperature of preposition heat exchanger 1 Inner eycle water, ensure the heat exchanger effectiveness of preposition heat exchanger 1, the steam after simultaneously heating up sends into full factory draining system by the output of hydrophobic heater 12.
It should be noted that, in this smoke waste heat utilization system, the power of flow of flue gas is provided by compressed air, and compressed air is blown in heat exchanger through soot blower 3 by compressed air piping.
In water circulation unit, the power of recirculated water flowing is provided by booster pump group 8, the flow velocity of recycling water formulation can be carried out, by the flow velocity of the flowmeter survey recirculated water be arranged on the first water supply line 5 and the second water supply line 6 by the number of open state booster pump and the power of booster pump in adjustment booster pump group 8.
Because recirculated water has loss in heat exchanging process repeatedly, therefore hot media compensator 7 water supply circulatory system supply demineralized water.
The above, it is only preferred embodiment of the present invention, not any restriction is made to technical scope of the present invention, thus every above embodiment is done according to technical spirit of the present invention any trickle amendment, equivalent variations and modification, all still belong in the scope of technical scheme of the present invention.

Claims (9)

1. a smoke waste heat utilization system for coal-burning boiler, is characterized in that: comprise deduster flue gas cool-down unit, desulfurizing tower flue gas intensification unit, water circulation unit and compressed air piping; Described deduster flue gas cool-down unit comprises the preposition heat exchanger (1) being arranged at electric cleaner input; Described desulfurizing tower flue gas intensification unit comprises the rearmounted heat exchanger (2) being arranged at desulfurizing tower output; One end of described preposition heat exchanger (1) is connected with the flue of coal-burning boiler, and the other end is connected with the input of electric cleaner; One end of described rearmounted heat exchanger (2) is connected with the output of desulfurizing tower, and the other end is connected with the input of chimney; Described preposition heat exchanger (1) and rearmounted heat exchanger (2) are pipe heat exchanger; Described pipe heat exchanger comprises the heat exchanger shell that is connected with flue and is located at the heat exchanger tube (4) be connected in heat exchanger shell and with water circulation unit; Described heat exchanger shell be provided be communicated with flue enter mouth and outlet flue; Described heat exchanger tube (4) is provided with the water inlet and delivery port that are connected with water circulation unit; Described heat exchanger shell is provided with soot blower (3); Described soot blower (3) output extends to heat exchanger shell inside.
2. the smoke waste heat utilization system of a kind of coal-burning boiler according to claim 1, is characterized in that: described water circulation unit comprises the first water supply line (5), the second water supply line (6), hot media compensator (7) and booster pump group (8); The input of described first water supply line (5) is connected with the output of booster pump group (8); The delivery port of the heat exchanger tube (4) of described rearmounted heat exchanger (2) and the output parallel connection of hot media compensator (7) are linked into the input of booster pump group (8); The water inlet of the heat exchanger tube (4) of described preposition heat exchanger (1) is linked into the output of the first water supply line (5); The delivery port of the heat exchanger tube (4) of described preposition heat exchanger (1) is linked into the input of the second water supply line (6); The water inlet of the heat exchanger tube (4) of described rearmounted heat exchanger (2) is linked into the output of the second water supply line (6).
3. the smoke waste heat utilization system of a kind of coal-burning boiler according to claim 2, is characterized in that: described water circulation unit also comprises auxiliary heat-exchanging unit; Described auxiliary heat-exchanging unit comprises the 3rd water supply line (9), the 4th water supply line (10), hot media auxiliary heater (11) and hydrophobic heater (12); Between the input that described 3rd water supply line (9) parallel connection is linked into the first water supply line (5) and output; Described hydrophobic heater (12) is installed on the 3rd water supply line (9); Between the input that described 4th water supply line (10) parallel connection is linked into the second water supply line (6) and output; Described hot media auxiliary heater (11) is installed on the 4th water supply line (10); The input of described hot media auxiliary heater (11) connects auxiliary steam mother pipe, and the output of described hydrophobic heater (12) connects full factory draining system.
4. the smoke waste heat utilization system of a kind of coal-burning boiler according to claim 1, is characterized in that: the input of the upper soot blower (3) installed of described preposition heat exchanger (1) connects compressed air piping; The input of the upper soot blower (3) installed of described rearmounted heat exchanger (2) connects auxiliary steam mother pipe.
5. the smoke waste heat utilization system of a kind of coal-burning boiler according to claim 1, is characterized in that: be positioned in described heat exchanger shell and be equipped with temperature monitoring point near mouth and outlet flue; Pressure detecting point is provided with in described heat exchanger shell; Described heat exchanger tube (4) is provided with temperature detecting point.
6. the smoke waste heat utilization system of a kind of coal-burning boiler according to claim 2, is characterized in that: the input of described first water supply line (5) and the second water supply line (6) and output are equipped with temperature detecting point and pressure detecting point.
7. the smoke waste heat utilization system of a kind of coal-burning boiler according to claim 2, is characterized in that: described first water supply line (5) and the second water supply line (6) are all provided with flowmeter.
8. the smoke waste heat utilization system of a kind of coal-burning boiler according to claim 3, is characterized in that: the input of described hot media auxiliary heater (11) is provided with temperature detecting point and pressure detecting point; The output of described hot media auxiliary heater (11) and hydrophobic heater (12) is equipped with temperature detecting point.
9. the smoke waste heat utilization system of a kind of coal-burning boiler according to claim 4, is characterized in that: described compressed air piping and the female pipe of auxiliary steam are equipped with temperature detecting point and pressure detecting point.
CN201510949634.6A 2015-12-18 2015-12-18 Smoke waste heat utilization system for coal-fired boiler Pending CN105465810A (en)

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CN201510949634.6A CN105465810A (en) 2015-12-18 2015-12-18 Smoke waste heat utilization system for coal-fired boiler

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Application Number Priority Date Filing Date Title
CN201510949634.6A CN105465810A (en) 2015-12-18 2015-12-18 Smoke waste heat utilization system for coal-fired boiler

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006029673A (en) * 2004-07-15 2006-02-02 Central Res Inst Of Electric Power Ind Method and device for removing gaseous mercury in exhaust gas
CN203586249U (en) * 2013-10-15 2014-05-07 广东中节能环保有限公司 Water medium type smoke heat exchanging system
CN103808200A (en) * 2014-02-13 2014-05-21 浙江浙能温州发电有限公司 Automatic regulating system for controlling temperature of working media of heat exchanger
CN103968406A (en) * 2014-05-13 2014-08-06 上海发电设备成套设计研究院 Water gas smoke-smoke heat exchanging system and method capable of preventing low-temperature corrosion
CN104100994A (en) * 2014-07-04 2014-10-15 西安西热锅炉环保工程有限公司 Boiler energy saving and emission reduction system based on flue gas waste heat recovery and reheating technology
CN204388102U (en) * 2014-12-31 2015-06-10 福建龙净环保股份有限公司 A kind of flue gas waste heat utilization device
CN205261605U (en) * 2015-12-18 2016-05-25 广东粤电大埔发电有限公司 Coal fired boiler's flue gas waste heat utilization system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006029673A (en) * 2004-07-15 2006-02-02 Central Res Inst Of Electric Power Ind Method and device for removing gaseous mercury in exhaust gas
CN203586249U (en) * 2013-10-15 2014-05-07 广东中节能环保有限公司 Water medium type smoke heat exchanging system
CN103808200A (en) * 2014-02-13 2014-05-21 浙江浙能温州发电有限公司 Automatic regulating system for controlling temperature of working media of heat exchanger
CN103968406A (en) * 2014-05-13 2014-08-06 上海发电设备成套设计研究院 Water gas smoke-smoke heat exchanging system and method capable of preventing low-temperature corrosion
CN104100994A (en) * 2014-07-04 2014-10-15 西安西热锅炉环保工程有限公司 Boiler energy saving and emission reduction system based on flue gas waste heat recovery and reheating technology
CN204388102U (en) * 2014-12-31 2015-06-10 福建龙净环保股份有限公司 A kind of flue gas waste heat utilization device
CN205261605U (en) * 2015-12-18 2016-05-25 广东粤电大埔发电有限公司 Coal fired boiler's flue gas waste heat utilization system

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