CN216203455U - Gas and flue gas utilization combined transformation system of coal-fired boiler flue gas treatment system - Google Patents
Gas and flue gas utilization combined transformation system of coal-fired boiler flue gas treatment system Download PDFInfo
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- CN216203455U CN216203455U CN202121831918.2U CN202121831918U CN216203455U CN 216203455 U CN216203455 U CN 216203455U CN 202121831918 U CN202121831918 U CN 202121831918U CN 216203455 U CN216203455 U CN 216203455U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses a gas and flue gas utilization combined transformation system of a flue gas treatment system of a coal-fired boiler, which comprises a flue gas and air treatment unit and a flue gas waste heat recovery unit, wherein the flue gas and air treatment unit comprises a combustion module, a flue gas heat exchange module and a flue gas treatment module; an energy saver and an air preheater are arranged in the flue gas heat exchange module, a bag-type dust remover and an internal part of a desulfurization and denitrification tower are omitted from equipment in the flue gas treatment module to be used as a chimney, a flue gas heat collector in the absorption heat pump waste heat recovery module is arranged in the chimney, and a flue gas waste heat recovery unit is arranged in an original induced draft fan. The system modification is based on the original coal-fired boiler flue gas treatment system and carries out adaptive modification on the system, and the system has very important significance for the heat supply system in the aspects of saving energy, reducing consumption and improving comprehensive utilization efficiency.
Description
Technical Field
The utility model relates to the technical field of heat energy and environmental protection engineering, in particular to a gas and flue gas utilization combined transformation system of a flue gas treatment system of a coal-fired boiler.
Background
In recent years, with the gradual improvement of the environmental protection emission requirements of industrial enterprises in China and the increase of the application promotion of clean energy and renewable energy, a large number of coal-fired industrial boilers face the transformation requirements of 'coal-to-gas'. On one hand, due to the change of boiler fuel and the improvement of fuel cost, in the process of changing a coal-fired boiler into a gas-fired boiler, users expect to change or add various system devices according to requirements and need to further consider the energy-saving and consumption-reducing problems of the gas-fired boiler; on the other hand, in the design and construction process of the boiler coal-to-gas project, the modification workload, the working difficulty and the technical content of the boiler flue gas system can also be referred to as the significance. In order to solve the problems, the flue gas waste heat recovery, energy saving and consumption reduction are improved while the old equipment is repaired, the used waste is utilized, new and old equipment is integrated and utilized through the improvement of a coal-fired boiler flue gas treatment system and the application of an energy-saving technology, the energy cost is reduced through a series of measures, the economic benefit is brought, the national energy-saving and emission-reduction policy is responded actively, and the positive political benefit is brought.
SUMMERY OF THE UTILITY MODEL
This section is for the purpose of summarizing some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the utility model.
The utility model is provided in view of the above and/or the problems existing in the existing coal-fired boiler flue gas treatment system fuel gas and flue gas utilization combined transformation system.
Therefore, the utility model aims to solve the problem of how to provide a combined transformation system for gas and flue gas utilization of a flue gas treatment system of a coal-fired boiler.
In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a coal fired boiler flue gas processing system gas and flue gas utilization jointly transform system, its includes, flue gas waste heat recovery unit, includes the absorption heat pump waste heat recovery module of being connected with flue gas wind processing unit, absorption heat pump waste heat recovery module include the flue gas heat collector, and with the gas that the flue gas heat collector is connected directly drives the absorption heat pump.
As a preferred scheme of the combined reforming system for gas and flue gas utilization of the flue gas treatment system of the coal-fired boiler, the combined reforming system comprises the following steps: the smoke and air processing unit comprises a smoke heat exchange module, a smoke processing module connected with the smoke heat exchange module, and a combustion module connected with the smoke heat exchange module.
As a preferred scheme of the combined reforming system for gas and flue gas utilization of the flue gas treatment system of the coal-fired boiler, the combined reforming system comprises the following steps: the combustion module comprises a combustor and a heat source boiler connected with the combustor, and the flue gas heat exchange module comprises an energy saver connected with the heat source boiler and an air preheater connected with the energy saver.
As a preferred scheme of the combined reforming system for gas and flue gas utilization of the flue gas treatment system of the coal-fired boiler, the combined reforming system comprises the following steps: the flue gas treatment module comprises a flue gas and air pipeline, the heat source boiler is connected with the energy saver through the flue gas and air pipeline, and the energy saver is connected with the air preheater through the flue gas and air pipeline.
As a preferred scheme of the combined reforming system for gas and flue gas utilization of the flue gas treatment system of the coal-fired boiler, the combined reforming system comprises the following steps: the flue gas treatment module further comprises a chimney, the flue gas heat collector is arranged in the chimney, and the air preheater is introduced into the chimney and connected with the flue gas heat collector.
As a preferred scheme of the combined reforming system for gas and flue gas utilization of the flue gas treatment system of the coal-fired boiler, the combined reforming system comprises the following steps: the absorption heat pump waste heat recovery module further comprises a waste heat water circulating pump respectively connected with the flue gas heat collector and the fuel gas direct-drive absorption heat pump.
As a preferred scheme of the combined reforming system for gas and flue gas utilization of the flue gas treatment system of the coal-fired boiler, the combined reforming system comprises the following steps: the flue gas waste heat recovery unit further comprises a condensate water recovery processing module, and the condensate water recovery processing module comprises a condensate water collection water tank which is respectively connected with the heat source boiler, the economizer, the air preheater and the gas direct-drive absorption heat pump.
As a preferred scheme of the combined reforming system for gas and flue gas utilization of the flue gas treatment system of the coal-fired boiler, the combined reforming system comprises the following steps: the condensed water recovery processing module also comprises a condensed water dosing device connected with the condensed water collecting water tank.
As a preferred scheme of the combined reforming system for gas and flue gas utilization of the flue gas treatment system of the coal-fired boiler, the combined reforming system comprises the following steps: the condensed water recycling and processing module also comprises a condensed water to production water replenishing pump connected with the condensed water dosing device.
As a preferred scheme of the combined reforming system for gas and flue gas utilization of the flue gas treatment system of the coal-fired boiler, the combined reforming system comprises the following steps: the gas direct-drive absorption heat pump is connected with the pipe network water supply which is introduced into the heat source boiler.
The utility model has the advantages that the scheme is based on the original coal-fired boiler flue gas treatment system and carries out adaptive modification on the system, scientific integration and comprehensive utilization of new and old equipment are fully considered from the design aspect, the process system is reasonable in arrangement, the space and the materials are saved, the smoke exhaust temperature is reduced, the fuel gas consumption is saved, and meanwhile, the recovery and the utilization of condensed water and the effective elimination of smoke plume are realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is an overall flow chart of a gas and flue gas utilization combined reforming system of a flue gas treatment system of a coal-fired boiler.
FIG. 2 is a flow chart of a combined gas and flue gas utilization reforming system of a flue gas treatment system of a coal-fired boiler.
FIG. 3 is a flue gas flow diagram of a combined gas and flue gas utilization reforming system of a flue gas treatment system of a coal-fired boiler.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 2, a first embodiment of the present invention provides a combined gas and flue gas utilization system for a flue gas treatment system of a coal-fired boiler, and the combined gas and flue gas utilization system for a flue gas treatment system of a coal-fired boiler comprises a flue gas treatment unit 100 and a flue gas waste heat recovery unit 200.
Specifically, the flue gas waste heat recovery unit 200 comprises an absorption heat pump waste heat recovery module 201 connected with the flue gas and air treatment unit 100, the absorption heat pump waste heat recovery module 201 comprises a flue gas heat extractor 201a and a fuel gas direct-drive absorption heat pump 201b connected with the flue gas heat extractor 201a, the flue gas and air treatment unit 100 utilizes sensible heat in flue gas to heat boiler feed water and combustion-supporting air, tail gas containing water vapor flows through the flue gas waste heat recovery unit 200, the flue gas flowing through the flue gas heat extractor 201a and low-temperature water generated by the fuel gas direct-drive absorption heat pump 201b carry out heat exchange, the flue gas heat extractor 201a further recovers residual sensible heat in the flue gas and latent heat generated after vaporization of the water vapor and then discharges the recovered residual sensible heat to the atmosphere, and the fuel gas direct-drive absorption heat pump 201b recovers a part of vaporization latent heat in the flue gas and sends the recovered latent heat to a pipe network feed water.
When the flue gas heat recovery device is used, flue gas discharged after combustion of externally input fuel gas sequentially flows through the flue gas heat extractor 201a and the fuel gas direct-drive absorption heat pump 201b in the flue gas and air treatment unit 100 and the flue gas waste heat recovery unit 200, after part of sensible heat is utilized and recovered by the flue gas and air treatment unit 100, the flue gas flows through the flue gas heat extractor 201a, and at the moment, the flue gas heat extractor 201a recovers and utilizes residual sensible heat and latent heat after vaporization to exchange heat with low-temperature water generated by the fuel gas direct-drive absorption heat pump 201b, so that high-temperature heat in the flue gas is transferred to the waste heat water in a heat conduction manner.
Example 2
Referring to fig. 3, a second embodiment of the present invention is based on the previous embodiment.
Specifically, flue gas and air processing unit 100 includes flue gas heat transfer module 101, with flue gas processing module 102 that flue gas heat transfer module 101 is connected, and with combustion module 103 that flue gas heat transfer module 101 is connected, combustion module 103 include combustor 103a, and with heat source boiler 103b that combustor 103a is connected, flue gas heat transfer module 101 include with energy-saving appliance 101b that heat source boiler 103b is connected, and with air heater 101a that energy-saving appliance 101b is connected, heat source boiler 103b is energy input and heat source output device in this system transformation, and energy-saving appliance 101b and air heater 101a utilize sensible heat heating boiler feedwater and combustion-supporting wind in the flue gas.
Further, the flue gas treatment module 102 includes a flue gas and air pipeline 102a, the heat source boiler 103b is connected with the economizer 101b through the flue gas and air pipeline 102a, the economizer 101b is connected with the air preheater 101a through the flue gas and air pipeline 102a, the flue gas and air pipeline 102a is a steel pipeline, and the flue gas treatment module 102 is mainly used for flue gas and dust purification and SO purification of coal-fired boilersX、NOXAnd the flue gas dust removal, desulfurization and denitrification equipment for treating the harmful gases removes the whole set of dust removal equipment in the flue gas treatment module 102, so that an arrangement space is provided for the reconstruction of the flue gas and air treatment unit 100 and the energy saver 101 b.
Further, the flue gas treatment module 102 further comprises a chimney 102b, the flue gas heat extractor 201a is arranged in the chimney 102b, the air preheater 101a is introduced into the chimney 102b and connected with the flue gas heat extractor 201a, the chimney 102b is formed by completely removing all internal components except for structural members in the desulfurization and denitrification tower, an arrangement space is provided for the flue gas heat extractor 201a, the desulfurization and denitrification tower body is used as a chimney 102b of a heat source boiler 103b after being modified, and scientific integration and comprehensive utilization of new and old equipment are fully considered in design.
When the gas boiler is used, flue gas generated by combustion of externally input gas through the combustor 103a sequentially flows through the heat source boiler 103b, the economizer 101b, the air preheater 101a and the flue gas heat extractor 201a, the heat source boiler 103b absorbs sensible heat to heat supply water and sends the water to a user for supplying water, the economizer 101b heats boiler feed water by using the sensible heat in the flue gas in a heating and recycling manner, the air preheater 101a heats combustion-supporting air by using the sensible heat in the flue gas in a recycling manner and performs mixed combustion with the flue gas, and the flue gas heat extractor 201a further recycles residual sensible heat and latent heat of vaporization of water vapor in the flue gas and then discharges the flue gas to the atmosphere through the chimney 102 b.
Example 3
Referring to fig. 1, a third embodiment of the present invention is based on the first two embodiments.
Specifically, the absorption heat pump waste heat recovery module 201 further comprises a waste heat water circulating pump 201c respectively connected with the flue gas heat collector 201a and the gas direct-drive absorption heat pump 201b, when the flue gas flows through the flue gas heat collector 201a and exchanges heat with low-temperature water generated by the gas direct-drive absorption heat pump 201b, high-temperature heat in the flue gas is transferred to the waste heat water in a heat conduction manner, reciprocating circulation is performed through the waste heat water circulating pump 203, sensible heat and latent heat in the flue gas are recovered in the process, the process is used for heating primary network return water, and white smoke plume is reduced while deep utilization of the waste heat is achieved.
Further, the flue gas waste heat recovery unit 200 further includes a condensate water recovery processing module 202, the condensate water recovery processing module 202 includes a condensate water collection water tank 202a connected to the heat source boiler 103b, the economizer 101b, the air preheater 101a, the flue gas heat collector 201a, and the gas direct-drive absorption heat pump 201b, respectively, after the heat receiving surface space of the heat source boiler 103b is subjected to closed transformation and sealing processing, a negative pressure boiler is transformed into a micro-positive pressure boiler, a gas burner 103a, a condensate water pipeline and a condensate water collection water tank 202a of collection equipment are additionally installed, and condensate water discharged from the heat source boiler 103b, the economizer 101b, the air preheater 101a, the flue gas heat collector 201a, and the gas direct-drive absorption heat pump 201b is collected in the condensate water collection water tank 202 a.
Further, the condensed water recycling module 202 further includes a condensed water dosing device 202b connected to the condensed water collection tank 202a, the condensed water recycling module 202 further includes a condensed water to production water make-up pump 202c connected to the condensed water dosing device 202b, and the condensed water PH value in the condensed water collection tank 202a is automatically detected and subjected to processes such as automatic alkali adding adjustment by the condensed water dosing device 202 b. And the qualified condensate water is treated as a boiler and heat supply network water replenishing water source through the condensate water to production water replenishing pump 202 c.
Further, the gas direct-drive absorption heat pump 201b is connected with pipe network water supply which is introduced into the heat source boiler 103b, in the unit of the gas direct-drive absorption heat pump 201b, part of primary network backwater firstly enters the gas direct-drive absorption heat pump 201b, and after heat absorption and temperature rise, the primary network backwater is led to a raw water pipe to enter the heat source boiler 103b to be continuously heated and then enters a primary network water supply main pipe.
When in use, the gas direct-drive absorption heat pump 201b and the condensate water recovery processing module 202 are arranged nearby the flue gas heat collector 201a, flue gas generated after gas combustion is recovered and utilized by the flue gas and air processing unit 100, and when the flue gas flows through the flue gas heat collector 201a, the flue gas exchanges heat with low-temperature water generated by the gas direct-drive absorption heat pump 201b, the flue gas is circulated back and forth by the residual heat water circulating pump 201c, sensible heat and latent heat in the flue gas are recovered to a great extent, the condensate water recovery processing module 202 collects condensate water discharged by the heat source boiler 103b, the economizer 101b, the air preheater 101a, the flue gas heat collector 201a, the gas direct-drive absorption heat pump 201b and other equipment into the condensate water collection water tank 202a, and the condensate water pH value in the condensate water collection water tank 202a is subjected to process treatments such as automatic detection, automatic alkali adding adjustment and the like by the condensate water dosing device 202b, and then the qualified condensate water is treated as a boiler and heat supply network water replenishing water source by a condensate water to production water replenishing pump 202 c.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a coal fired boiler flue gas processing system gas and flue gas utilization jointly transform system which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the flue gas waste heat recovery unit (200) comprises an absorption heat pump waste heat recovery module (201) connected with the flue gas and air processing unit (100), wherein the absorption heat pump waste heat recovery module (201) comprises a flue gas heat collector (201a) and a fuel gas direct-drive absorption heat pump (201b) connected with the flue gas heat collector (201 a).
2. The coal-fired boiler flue gas treatment system gas and flue gas utilization combined transformation system of claim 1, wherein: the smoke and wind processing unit (100) comprises a smoke heat exchange module (101), a smoke processing module (102) connected with the smoke heat exchange module (101), and a combustion module (103) connected with the smoke heat exchange module (101).
3. The coal-fired boiler flue gas treatment system gas and flue gas utilization combined transformation system of claim 2, wherein: the combustion module (103) comprises a combustor (103a) and a heat source boiler (103b) connected with the combustor (103a), and the flue gas heat exchange module (101) comprises an economizer (101b) connected with the heat source boiler (103b) and an air preheater (101a) connected with the economizer (101 b).
4. The coal-fired boiler flue gas treatment system gas and flue gas utilization combined transformation system of claim 3, characterized in that: the flue gas treatment module (102) comprises a flue gas and air pipeline (102a), the heat source boiler (103b) is connected with the energy saver (101b) through the flue gas and air pipeline (102a), and the energy saver (101b) is connected with the air preheater (101a) through the flue gas and air pipeline (102 a).
5. The coal-fired boiler flue gas treatment system gas and flue gas utilization combined transformation system of claim 3 or 4, characterized in that: the flue gas treatment module (102) further comprises a chimney (102b), the flue gas heat collector (201a) is arranged in the chimney (102b), and the air preheater (101a) is introduced into the chimney (102b) and connected with the flue gas heat collector (201 a).
6. The coal-fired boiler flue gas treatment system gas and flue gas utilization combined transformation system of claim 4, wherein: the absorption heat pump waste heat recovery module (201) further comprises a waste heat water circulating pump (201c) respectively connected with the flue gas heat collector (201a) and the gas direct-drive absorption heat pump (201 b).
7. The coal-fired boiler flue gas treatment system gas and flue gas utilization combined modification system of any one of claims 3, 4 or 6, characterized in that: the flue gas waste heat recovery unit (200) further comprises a condensate water recovery processing module (202), and the condensate water recovery processing module (202) comprises a condensate water collection water tank (202a) which is respectively connected with the heat source boiler (103b), the economizer (101b), the air preheater (101a), the flue gas heat collector (201a) and the gas direct-drive absorption heat pump (201 b).
8. The coal-fired boiler flue gas treatment system gas and flue gas utilization combined transformation system of claim 7, wherein: the condensed water recovery processing module (202) also comprises a condensed water dosing device (202b) connected with the condensed water collecting water tank (202 a).
9. The coal fired boiler flue gas treatment system gas and flue gas utilization combined modification system of claim 8, wherein: the condensed water recovery processing module (202) further comprises a condensed water to production water replenishing pump (202c) connected with the condensed water dosing device (202 b).
10. The coal-fired boiler flue gas treatment system gas and flue gas utilization combined modification system of any one of claims 3, 4, 6, 8 or 9, wherein: the gas direct-drive absorption heat pump (201b) is connected with the pipe network water supply which is introduced into the heat source boiler (103 b).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121831918.2U CN216203455U (en) | 2021-08-06 | 2021-08-06 | Gas and flue gas utilization combined transformation system of coal-fired boiler flue gas treatment system |
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| CN202121831918.2U CN216203455U (en) | 2021-08-06 | 2021-08-06 | Gas and flue gas utilization combined transformation system of coal-fired boiler flue gas treatment system |
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