CN203671637U - Low-low temperature flue gas waste heat recovery system - Google Patents

Low-low temperature flue gas waste heat recovery system Download PDF

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Publication number
CN203671637U
CN203671637U CN201320875173.9U CN201320875173U CN203671637U CN 203671637 U CN203671637 U CN 203671637U CN 201320875173 U CN201320875173 U CN 201320875173U CN 203671637 U CN203671637 U CN 203671637U
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China
Prior art keywords
heat exchanger
low
flue gas
waste heat
plate type
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CN201320875173.9U
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Chinese (zh)
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韩淑媛
张安国
郑明东
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Ji'nan mountain Environmental Technology Co., Ltd.
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JINAN SHANYUAN ELECTRIC EQUIPMENT Co Ltd
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    • 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
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • 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
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/62Absorption based systems
    • 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
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

A low-low temperature flue gas waste heat recovery system comprises an air heater, an air pre-heater, an electric precipitator, a glue gas cooler and a plate heat exchanger. The air heater heats the air entering the air pre-heater through the hot water in the plate heat exchanger, steam extraction is reduced, coal consumption is reduced, a lithium bromide refrigerating unit and a water tank are additionally arranged on the plate heat exchanger II to form the refrigerating system and the heating system, the refrigerating system and the heating system are used under different environments, can be used at the same time and can also be used independently, using is more flexible, the low-low temperature flue gas waste heat recovery system is used in a more pertinent mode, for example, a heat supply network circulating system can be selected and used in winter for heating, and the refrigerating system can be selected and used in summer for refrigerating. According to the technical scheme, the low-low temperature dust removing benefits are achieved, the new waste heat utilizing form is provided, the scheme system is stable, has no adverse effect on an original system and is not limited by seasons and areas, deep energy conservation is achieved, and emission is reduced.

Description

A kind of low low-temperature flue gas waste heat recovery system
Technical field
The utility model relates to a kind of low low-temperature flue gas waste heat recovery system, relates in particular to the low low-temperature flue gas waste heat recovery system of a kind of one that significantly improves dust removing effects and low low-temperature flue gas waste heat is made full use of.
Background technology
The exhaust gas temperature of domestic many station boilers is higher at present, temperature is generally at 130 ℃ ~ 150 ℃, also some exhaust gas temperature is up to 180 ~ 200 ℃, if the fume afterheat of getting rid of not made full use of, waste a large amount of heat energy, empty cost source, because the smoke discharging residual heat of station boiler is higher, therefore be necessary effectively to utilize fume afterheat, realize the degree of depth energy-conservation, improve the economy of thermal power plant's raising unit.
The existing technological means that surplus heat of power plant is utilized is generally: the mode that installs gas cooler at boiler back end ductwork additional utilizes tail flue gas waste-heat steam turbine condensate water to improve the heat-economy of unit, with regard to installing the technical scheme of gas cooler additional, there are two kinds of modes: a kind of be arranged in after electric cleaner for gas cooler; Another kind of for before gas cooler is arranged in electric cleaner; The first put scheme to efficiency of dust collection without any raising, first scheme dust collector efficiency improvement value is very little, and electric cleaner input gas temperature is higher than acid dew point, with regard to fume afterheat purposes, the scheme of fume afterheat heat-setting water, how much all can exert an influence to the vacuum of steam turbine, be unfavorable for that unit moves for a long time, and insufficient to utilizing of fume afterheat, along with the enforcement of new edition thermal power plant pollutant emission standard, utilize form and original electric precipitation effect to have higher requirement to fume afterheat.
Summary of the invention
For solving above-mentioned technological deficiency, the utility model provides a kind of low low-temperature flue gas waste heat recovery system, and it especially can be realized: 1, and reduce electric cleaner inlet flue gas temperature, and then reduce dust specific resistance, performance low temperature dustproof function, reduces deduster outlet dust emission;
2, cigarette temperature drop low (cigarette temperature can be cooled to low low temperature range: 85 ℃ ~ 110 ℃), flue gas volume reduces, and reduces fan energy consumption, improves reliability;
3, enter desulphurization system cigarette temperature drop low, reduce wet desulphurization water consumption;
4, Mist heat recovering to greatest extent, different operating mode differences are utilized form, improve economy.
For achieving the above object, the utility model is by the following technical solutions:
A kind of low low-temperature flue gas waste heat recovery system, comprise steam air heater, air preheater, electric cleaner, gas cooler, plate type heat exchanger, described gas cooler is arranged in the flue between air preheater and electric cleaner, on the water inlet pipe of gas cooler, be provided with water circulating pump, water circulating pump delivery port is provided with vacuum tank and plate type heat exchanger I, described steam air heater is arranged on the air inlet of air preheater, and steam air heater is connected with outlet pipe and the water inlet pipe of plate type heat exchanger I by plate type heat exchanger II water inlet pipe and outlet pipe.
Further, the low low-temperature flue gas waste heat recovery system of described one, also comprises lithium bromide refrigerating unit, and described lithium bromide refrigerating unit is arranged on the outlet pipe of plate type heat exchanger II.
Further, described lithium bromide refrigerating unit utilizes the warm water in the outlet pipe of plate type heat exchanger II to form refrigeration system.
Further, between the water inlet pipe of described plate type heat exchanger II and outlet pipe, also can add water tank, make the warm water between water inlet pipe and outlet pipe form a water circulation, form heating system.
Further, the heat exchanger tube that described gas cooler adopts is H type finned tube, the special steel material ND steel of heat exchanger tube material selection sulfuric acid corrosion resistant.
As preferably, gas cooler adopts modularized design, easy access and replacing, and each module can be stopped transport separately in the time there is leakage problem, does not affect the operation of other modules, the utilization rate of raising equipment.
Further, the inside and outside medium of heat exchanger tube in gas cooler carries out countercurrent flow form, and the outer medium of heat exchanger tube is flue gas, in pipe, medium is closed cycle water, the safe operation below acid dew point of assurance equipment, maximum possible absorbs fume afterheat, reaches maximum energy-saving effect.
The beneficial effects of the utility model are:
1, by adding plate type heat exchanger, the hot gas in gas cooler is made full use of, hot gas is converted into hot water, and hot water is further utilized, make full use of waste heat, reduce energy consumption;
2, make steam air heater utilize the hot water in plate type heat exchanger to heat the air entering in air preheater, reduce and draw gas thus, reduce coal consumption;
3, form refrigeration system by adding lithium bromide refrigerating unit on the outlet pipe at plate type heat exchanger II, the hot water in plate type heat exchanger is further utilized, meet refrigeration demand;
4, by also adding water tank between the water inlet pipe at plate type heat exchanger II and outlet pipe, form heating system, meet client's heating demand;
5, above-mentioned refrigeration system, heating system use under different environment, can use simultaneously, also can separately use, it uses more flexibly, has more specific aim, such as very cold in the winter time, China northeast, the Northwest that heating period is grown, can select steam air heater heating system; In summer climate sweltering heat, the south China area that the phase of need to freezing is grown, can select refrigeration system, this technical scheme had both reached low temperature dedusting benefit, and the new model of UTILIZATION OF VESIDUAL HEAT IN is provided again, this scheme system stability, to original system without any adverse effect, be not subject to the restriction of season and region, realize the degree of depth energy-conservation, reduce discharge.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Fig. 1, a kind of low low-temperature flue gas waste heat recovery system structural representation.
In figure, 1 gas cooler, 2 electric cleaners, 3 vacuum tanks, 4 plate type heat exchanger I, 5 water circulating pumps, 6 plate type heat exchanger II, 7 water tanks, 8 lithium bromide refrigerating units, 9 steam air heaters, 10 air preheaters, 11 desulfurizers.
The specific embodiment
By reference to the accompanying drawings 1, a kind of low low-temperature flue gas waste heat recovery system, comprise steam air heater 9, air preheater 10, electric cleaner 2, gas cooler 1, plate type heat exchanger, described gas cooler 1 is arranged in the flue between air preheater 10 and electric cleaner 2, on the water inlet pipe of gas cooler 1, be provided with water circulating pump 5, water circulating pump 5 delivery ports are provided with vacuum tank 3 and plate type heat exchanger I, gas cooler 1 adopts modularized design, easy access and replacing, the heat exchanger tube that gas cooler 1 adopts is H type finned tube, the inside and outside medium of heat exchanger tube carries out countercurrent flow form, the outer medium of heat exchanger tube is flue gas, in pipe, medium is closed cycle water, the special steel material ND steel of heat exchanger tube material selection sulfuric acid corrosion resistant, the safe operation below acid dew point of assurance equipment, maximum possible absorbs fume afterheat, reach maximum energy-saving effect.
Described steam air heater 9 is arranged on the air inlet of air preheater 10, steam air heater 9 is connected with outlet pipe and the water inlet pipe of plate type heat exchanger I by plate type heat exchanger II water inlet pipe and outlet pipe, the described lithium bromide refrigerating unit 8 that also comprises, lithium bromide refrigerating unit 8 is arranged on the outlet pipe of plate type heat exchanger II, and lithium bromide refrigerating unit 8 utilizes the warm water in the outlet pipe of plate type heat exchanger II to form refrigeration system; Between the water inlet pipe of described plate type heat exchanger II and outlet pipe, also can add 7 water tanks, make the warm water between water inlet pipe and outlet pipe form a water circulation, form heating system, above-mentioned refrigeration system, heating system use under different environment, can use simultaneously, also can separately use, it uses more flexibly, has more specific aim, such as very cold in the winter time, China northeast, the Northwest that heating period is grown, can select steam air heater 9 heating systems; In summer climate sweltering heat, the south China area that the phase of need to freezing is grown, can select refrigeration system, and this technical scheme had both reached low temperature dedusting benefit, make to enter cigarette temperature drop in desulfurizer 11 low, reduce wet desulphurization water consumption, provide again the new model of UTILIZATION OF VESIDUAL HEAT IN, this scheme system stability, to original system without any adverse effect, be not subject to the restriction of season and region, realize the degree of depth energy-conservation, reduce discharge.
Obviously, above-mentioned embodiment is only preferred embodiments of the present utility model, and any simple modifications on this basis all belongs to better protection domain of the present utility model.

Claims (3)

1. one kind low low-temperature flue gas waste heat recovery system, comprise steam air heater, air preheater, electric cleaner, gas cooler, plate type heat exchanger, it is characterized in that described gas cooler is arranged in the flue between air preheater and electric cleaner, on the water inlet pipe of gas cooler, be provided with water circulating pump, water circulating pump delivery port is provided with vacuum tank and plate type heat exchanger I, described steam air heater is arranged on the air inlet of air preheater, and steam air heater is connected with plate type heat exchanger I outlet pipe and water inlet pipe by plate type heat exchanger II water inlet pipe and outlet pipe.
2. the low low-temperature flue gas waste heat recovery system of one according to claim 1, characterized by further comprising lithium bromide refrigerating unit, and described lithium bromide refrigerating unit is arranged on the outlet pipe of plate type heat exchanger II.
3. the low low-temperature flue gas waste heat recovery system of one according to claim 1, is characterized in that the heat exchanger tube that gas cooler adopts is H type finned tube, the special steel material ND steel of heat exchanger tube material selection sulfuric acid corrosion resistant.
CN201320875173.9U 2013-12-30 2013-12-30 Low-low temperature flue gas waste heat recovery system Active CN203671637U (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320875173.9U CN203671637U (en) 2013-12-30 2013-12-30 Low-low temperature flue gas waste heat recovery system

Publications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104896503A (en) * 2015-06-19 2015-09-09 东方电气集团东方锅炉股份有限公司 Boiler smoke waste heat use system
CN105905873A (en) * 2016-04-22 2016-08-31 中国瑞林工程技术有限公司 Technology for producing water by using low temperature waste heat and for recycling low temperature waste heat

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104896503A (en) * 2015-06-19 2015-09-09 东方电气集团东方锅炉股份有限公司 Boiler smoke waste heat use system
CN105905873A (en) * 2016-04-22 2016-08-31 中国瑞林工程技术有限公司 Technology for producing water by using low temperature waste heat and for recycling low temperature waste heat

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GR01 Patent grant
C14 Grant of patent or utility model
CP01 Change in the name or title of a patent holder

Address after: 301 room, Airport Road, Licheng District, Shandong, Ji'nan, 7617, China

Patentee after: Ji'nan mountain Environmental Technology Co., Ltd.

Address before: 301 room, Airport Road, Licheng District, Shandong, Ji'nan, 7617, China

Patentee before: JINAN SHANYUAN ELECTRIC EQUIPMENT CO., LTD.

Address after: 301 room, Airport Road, Licheng District, Shandong, Ji'nan, 7617, China

Patentee after: Ji'nan mountain Environmental Technology Co., Ltd.

Address before: 301 room, Airport Road, Licheng District, Shandong, Ji'nan, 7617, China

Patentee before: JINAN SHANYUAN ELECTRIC EQUIPMENT CO., LTD.

CP01 Change in the name or title of a patent holder
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Low-low temperature flue gas waste heat recovery system

Effective date of registration: 20190903

Granted publication date: 20140625

Pledgee: Qilu bank Limited by Share Ltd branch of the southern suburbs of Ji'nan

Pledgor: Ji'nan mountain Environmental Technology Co., Ltd.

Registration number: Y2019370000028

PE01 Entry into force of the registration of the contract for pledge of patent right